Mechanical valve actuator

专利摘要:
The invention relates to a valve actuating device for actuating at least one valve of a reciprocating engine, in particular an internal combustion engine, with variable valve lift, comprising: a first rocker arm part with a pivotable first coupling element, a second rocker arm part with a pivotable second coupling element, wherein the first rocker arm part and the second rocker arm part both are rotatably mounted about a common axis of rotation, and wherein a rotational movement about the common axis of rotation between the first Kipphebelteil and the second Kipphebelteil is transferable when the first coupling element and / or the second coupling element are in a coupling position.
公开号:AT519812A1
申请号:T50281/2017
申请日:2017-04-05
公开日:2018-10-15
发明作者:Andreas Zurk Ing；Thomas Salmutter Ing；Martin Klampfer Ing；Ing Gelter Jürgen
申请人:Avl List Gmbh；
IPC主号:

专利说明:

Summary
The invention relates to a valve actuation device for actuating at least one valve of a reciprocating piston machine, in particular an internal combustion engine, with a variable valve lift, comprising: a first rocker arm part with a pivotable first coupling element, a second rocker arm part with a pivotable second coupling element, the first rocker arm part and the second rocker arm part both are rotatably supported about a common axis of rotation, and wherein a rotational movement about the common axis of rotation between the first rocker arm part and the second rocker arm part is transferable when the first coupling element and / or the second coupling element are in a coupling position.
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Mechanical valve actuation device
The invention relates to a valve actuation device for actuating at least one valve of a reciprocating piston engine, in particular an internal combustion engine, with a variable valve lift.
Due to the ever increasing requirements in terms of performance, efficiency and emissions, variable valve trains in internal combustion engines, especially those in four-stroke operation, are becoming increasingly important.
With the variable valve trains, the need for
Engine designers and the desire of thermodynamics are met to alternatively transfer different valve lift curves to an engine valve, whereby both the valve lift and the opening and closing times can be adapted. This is generally achieved by switching over the transmission path of the valve train. Hubum15 and lift cut-off systems with switchable cam followers such as cup tappets, roller tappets or rocker arms are in series in various applications. The rule here is that a corresponding cam must also be present as a stroke-giving element for each additional alternative valve stroke - unless the alternative stroke is a zero stroke.
There are different areas of application for the use of valve trains with variable or variable valve lift. Some examples are listed below:
Stroke changeover: The stroke changeover enables the use of at least two different valve lifts depending on the operating point.
This uses a smaller valve lift that is specially tailored to the partial load range, which improves the torque curve and reduces consumption and emissions. The large valve lift can be extended to / 63
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Performance increase can be optimized. A smaller valve stroke with a smaller maximum stroke and a shorter length of the event enables a reduction in the gas exchange work (Miller cycle) due to a significantly earlier inlet closing time and dethrottling in the intake tract.
Similar results are possible with the Atkinson cycle, which means extremely late admission. Optimal filling of the combustion chamber results in an increase in torque in the partial load range.
Cylinder deactivation: The cylinder deactivation is mainly used for large-volume, multi-cylinder engines (for example with four, eight, ten or twelve engine cylinders). Selected engine cylinders are shut down by switching off the lift on the intake and exhaust valves; there is a complete decoupling from the cam lift. Due to equidistant firing sequences, common V8 and V12 engines can be switched to A4 or R6 engines. The purpose of the
Engine cylinder deactivation is to minimize the charge exchange losses and to shift the operating point to higher mean pressures and thus higher thermodynamic efficiency levels, which can achieve considerable fuel savings.
Engine brake operation: It is known to be in the engine cylinders one
To provide internal combustion engine additional macro valves with which a so-called decompression braking can be carried out by decompressing the cylinder via the additional engine valves at the end of the compression stroke of a four-stroke engine, that is to say at the end of the second stroke. As a result, the work performed on the compressed gas escapes via the exhaust system of the internal combustion engine. Furthermore, the internal combustion engine must again work to refill the cylinder with gas.
Furthermore, engine brakes are known which achieve the braking effect via variable valve operation of the actual exhaust valves.
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Engine brake systems are becoming increasingly important in vehicle internal combustion engines, in particular for commercial vehicles, since these are inexpensive and space-saving additional brake systems which can relieve the wheel brakes, especially on longer downhill journeys. In addition, the increase in the specific output of modern commercial vehicle engines also means an increase in the braking power to be achieved.
Against this background, DE 10 2005 010 182 A1 describes a variable mechanical valve control of an internal combustion engine, in particular with a camshaft underneath, for setting a valve lift and an opening and closing time of at least one intake and / or exhaust valve, tilt valves driven by a camshaft. or rocking lever actuate the inlet and outlet valves via a transmission gear and at least one push rod, an intermediate lever being connected to a push rod via an axle in such a way that a link roller rotatably mounted on the axle is moved in a link driven by a camshaft, whereby a first contact surface on the intermediate lever is supported by a spring on an eccentric shaft or on a second contour surface and a lever can be moved via a working curve, by means of which the gas exchange valves are opened and / or closed, and in particular on one on the st ßelstange provided follower means for the additional adjustment of the phase position of the valve lift of gas exchange valves at the same time play-free adjustment of the valve lift and means for additional, independently controllable Ventilhuböffnung and 25 closing each camshaft revolution are provided.
DE 10 2010 015 719 A1 relates to a switchable rocker arm for a valve train of an internal combustion engine with an inner lever, which has a system for a gas exchange valve on one underside at one end and a contact surface for a head of a support element on the other end, which inner lever on the one end with both sides / 63
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AVL List GmbH protruding axle pieces is provided, wherein on one axle piece a first and on the other axle piece a second outer arm can be pivoted relative to the inner lever, which outer arms extend towards the other end, flanking the outer walls of the inner lever, exist as individual pieces to each other and have a cam circumferential surface on their respective top, and the sections of the other end on the one hand in the inner lever a coupling device for selectively connecting the outer arms to the inner lever and on the other hand return spring means are provided for each of the outer arms, which one end against the
Act inner lever and other against the respective outer arm.
DE 100 66 056 B4 relates to a lift valve control for at least one valve of an engine, the lift valve control having a control shaft with a non-rotatably connected adjusting lever having an articulation point for a balance beam, the balance beam having rollers arranged at its two ends in contact surfaces of a engages first and a second, on a common axis rocker arm, the first rocker arm is driven by a cam via a cam and actuates the second rocker arm, which acts on the at least one valve, via the balance beam.
DE 10 2005 012 081 A1 relates to a variable mechanical valve control of an internal combustion engine, in particular with a camshaft below, for setting a valve lift and an opening, closing and control time of at least one intake and / or exhaust valve, with rocker or rocker arms driven by means of a camshaft about a
Transmission gearbox and at least one push rod actuate the inlet and exhaust valves, an intermediate lever being connected to a push rod via a joint in such a way that the intermediate lever, which is rotatably mounted on a fixed axis, can be driven by a camshaft, a lever being movable via a working curve, on the
Gas exchange valves are opened and / or closed, and where / 63
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AVL List GmbH, in particular on a tappet or rocker arm provided on the push rod, means are provided for adjusting the phase position, the stroke and the opening time of the valve lift of the gas exchange valves with simultaneous play-free adjustment.
US Pat. No. 4,612,887 A relates to a valve actuation device for intake and exhaust valves in an internal combustion engine, which has a rocker arm in an end pivoting manner. The rocker arm has two rocker arms which are connected by a connecting pin so as to be foldable. A lock pin selectively places the rocker arm in either a single fixed rocker arm state or a foldable rocker arm state that absorbs the lift of the cam to stop the valve from operating even though the cam continues to rotate. The connecting pin is arranged so that the displacement of the rocker arm during the foldable movement thereof is minimized.
US 4,617,880 A relates to a valve actuation device for intake and exhaust valves in an internal combustion engine, which has a rocker arm in an end pivoting manner. The rocker arm has two rocker arms which are connected by a connecting pin so as to be foldable. A locking pin either places the rocker arm in a position for a single fixed rocker arm or in a position for a foldable rocker arm in which it absorbs the lift of the cam to stop the valve from operating even though the cam continues to rotate. A stopper is provided to limit the reverse position of the arms when they are folded into the cam.
It is an object of the invention to provide an improved valve actuation device. In particular, it is an object of the invention to provide a valve actuation device which can be actuated mechanically.
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This object is achieved according to the invention by a valve actuation device according to claim 1 and a method for actuating a valve actuation device according to claim 27. Advantageous refinements are claimed in the subclaims. The teaching of
Claims are expressly made part of the description.
A first aspect of the invention relates to a valve actuation device for actuating at least one valve of a reciprocating piston engine, in particular an internal combustion engine, with a variable valve lift, comprising: a first rocker arm part with a pivotable first coupling element, a second rocker arm part with a pivotable second coupling element, the first rocker arm part and the second rocker arm part are both rotatably mounted about a common axis of rotation, and wherein a rotational movement about the common axis of rotation between the first rocker arm part and the second rocker arm part is transmissible when the first
Coupling element and / or the second coupling element are in a coupling position.
A second aspect of the invention relates to a method for actuating a valve actuation device, the coupling elements being pivoted into an uncoupling position by an actuating device, starting from a coupling position of a first and a second rocker arm part, in which the first and the second rocker arm part are force-free and in a second step, force is exerted on the rocker arm parts, so that the coupling elements are pivoted further into a defined end position.
A motor brake in the sense of the invention is a mechanical resistance which an internal combustion engine opposes to a torque which is forced on from the outside.
A valve in the sense of the invention is an intake or an exhaust valve, in particular a four-stroke engine.
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A valve control movement in the sense of the invention is a kinematic event, which is generated in particular by a camshaft and is transmitted to a valve. This event is described in particular by the physical parameters position, speed and acceleration.
A variable valve lift in the sense of the invention is a valve lift which can be changed in any way. In particular, two states can exist with respect to the variable valve lift, namely firstly a zero lift and secondly a defined valve lift.
A rocker arm part in the sense of the invention is a section of a valve lever, which is used to transmit a valve control movement from a camshaft to a valve of a reciprocating piston engine, in particular an internal combustion engine. The valve lever can in particular be designed as a rocker arm or rocker arm. According to the invention, the first rocker arm part and the second rocker arm part together form a valve lever, in particular a rocker arm.
A coupling position in the sense of the invention is a position in which two elements interact in such a way to transmit a rotary movement, in particular a rotary movement of a first element to the second element or vice versa. Accordingly, the elements interact in a decoupling position in such a way or are decoupled in such a way that no rotary movement can be transmitted.
The solution according to the invention is based in particular on the approach of designing the valve actuation device in such a way that a transmission of a
Rotary movement via a valve lever, which according to the invention is formed by a first rocker arm part and a second rocker arm part, can be switched in a simple manner from outside the valve lever.
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In particular, the pivotable coupling elements can be actuated mechanically by an actuating device of the valve actuating device, as provided in the following advantageous configurations.
Hydraulic, electronic or electromagnetic devices to the
According to the invention, it is therefore not necessary to transmit valve lift from camshaft to valve. According to the invention, the setting of the valve lift can also be exploited by the rotary movement generated by a cam, which acts on one of the rocker arm parts.
If the first coupling element and / or the second coupling element are in the coupling position, a valve control movement can be transmitted from a camshaft via the first rocker arm part and the second rocker arm part to a valve. The first rocker arm part and the second rocker arm part preferably form a fixed valve lever in the coupling position.
In an advantageous embodiment of the valve actuation device, the first rocker arm part and the second rocker arm part form a foldable valve lever in order to absorb a rotary movement from one of the rocker arm parts when the first coupling element and / or the second coupling element are in a decoupling position. In particular, by folding the valve lever formed by the first rocker arm part and the second rocker arm part, a movement which is introduced into the valve actuation device via one of the rocker arm parts can be absorbed. The e.g. lever not actuated on the cam side thus makes a “lost motion” stroke. According to the invention, the first coupling element and the second coupling element preferably pivot out against one another for this purpose, so that the overall extent of the valve lever formed from the first rocker arm part and the second rocker arm part is reduced about the common axis of rotation. Due to the smaller overall extent, the initiated movement is not forwarded.
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In a further advantageous embodiment of the valve actuation device, the first coupling element and the second coupling element are coupled, in particular connected, by a first joint. By providing the first joint, the rocker arm parts can be defined in relation to one another
Position held and operated together.
In a further advantageous embodiment of the valve actuation device, the first coupling element is connected to the first rocker arm part by a second joint and the second coupling element is connected to the second rocker arm part by a third joint.
In a further advantageous embodiment of the valve actuation device, the first coupling element and / or the second coupling element are prestressed by a resetting device, in particular at least one spring. By providing a reset device in relation to the coupling elements, a rest position of the coupling elements can be defined, which is assumed to be the normal position when no actuating device acts on the coupling elements.
In a further advantageous embodiment, the valve actuation device furthermore has an actuation device which is set up to actuate at least one of the coupling elements, in particular via the first joint. For this purpose, a tread is preferably provided on the coupling elements or on the first joint or one of their elements, which can interact with the actuating device. Due to the action of the actuating device on the coupling elements, they can be removed from it
Bring normal position. As a result, either a coupling position or a decoupling position can be realized.
In a further advantageous embodiment of the valve actuation device, the actuation device is set up to act to decouple the rocker arm parts in the radial direction outwards with respect to the axis of rotation.
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As a result, the rocker arm parts can be brought from their normal position, in this case the coupling position, into a decoupling position. In this decoupling position, initiating a rotary movement on one of the rocker arm parts does not lead to rotation of the other rocker arm part and thus of the entire valve lever, but rather a valve control movement is absorbed by the coupling elements and leads to a movement of the valve lever parts relative to one another.
In a further advantageous embodiment, the valve actuation device is set up to couple the
Rocker arm parts in the radial direction to act in relation to the axis of rotation on the at least one of the coupling elements. In this advantageous embodiment, the normal position is a decoupling position and the actuating device brings the coupling elements into the coupling position.
In a further advantageous embodiment of the valve actuation device, the actuation device is set up to press the two coupling elements (or rocker arm parts) into the coupling position against a bias of a resetting device, in particular at least one spring.
In a further advantageous embodiment of the valve actuation device, the actuation device is set up to hold the two coupling elements (or rocker arm parts) in a decoupling position against a bias of a resetting device, in particular at least one spring, in such a way that a rotary movement of one of the rocker arm parts causes the pivoting of the Coupling elements against each other and in relation to the
Rocker arm parts can cause.
In a further advantageous embodiment of the valve actuation device, the actuation device has a disk, in particular arranged coaxially with the rocker arm parts, which has at least two different radii on its circumference, a first, smaller / 63
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Radius for realizing the coupling position of the coupling elements (or rocker arm parts) and a second, larger radius for realizing the decoupling position of the coupling elements (or rocker arm parts), the disc preferably being rotatable about the axis of rotation independently of the rocker arm parts. The disk, which is preferably mounted on the camshaft by means of a hollow shaft, can be brought into the coupling position and the decoupling position by twisting.
In a further advantageous embodiment of the valve actuation device, the actuation device has a latching element and the at least one
Coupling element has a detent, which are designed to hold the at least one coupling element in a defined position, in particular in a coupling position or a decoupling position, when interacting. The latching element preferably prevents a reset device from being able to bring at least one of the two coupling elements back into the normal position, that is to say the coupling position or decoupling position.
In a further advantageous embodiment of the valve actuation device, the coupling elements are designed in such a way that their pivoting movement when a torque is applied to the
To block rocker arm parts in the coupling position. This mutual blocking corresponds to a kind of "self-locking". The greater the torque applied to the rocker arm parts about the common axis of rotation, the stronger the blocking between the two coupling elements of the rocker arm parts.
In a further advantageous embodiment of the valve actuation device, the blocking is achieved in that a first plane in which a second pivot axis of the second joint and a first pivot axis of the first joint lie, and a second plane in which a third pivot axis of the third joint and the first pivot axis of the first / 63
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Hinge lie, in the coupling position on one side facing the axis of rotation to each other an angle α of more than 180 °, preferably at least about 185 °. As a result, in the region of the first pivot axis when a torque acts on the two rocker arm parts
Generates torque, which causes a pivoting movement towards the common axis of rotation and thus blocks the coupling elements in the coupling position.
In a further advantageous embodiment of the valve actuation device, one-sided blocking of the coupling elements is achieved in that a first plane in which a second pivot axis of the second joint and a first pivot axis of the first joint lie, and a second plane in which a third pivot axis of the third Joint and the first pivot axis of the first joint are, in the coupling position on one side facing the axis of rotation to each other, an angle α of less than
180 °, preferably at most about 175 °. As a result, the
Action of a torque on the rocker arm parts on the first joint causes a torque away from the common axis of rotation and thus causes a pivoting movement. Through this, the two coupling elements are folded against each other, so that the extension of the
Valve lever is lower. The torque applied to the rocker arm parts and the subsequent movement is thus absorbed by the valve actuation device.
In a further advantageous embodiment of the valve actuation device, the first joint has a locking element, in particular a bolt or a ball, which is mounted on both coupling elements and defines the relative position of the two coupling elements to one another at least in the coupling position.
In a further advantageous embodiment of the valve actuation device according to the invention, the blocking element is on at least one of the / 63
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In a further advantageous embodiment of the valve actuation device, the first coupling element and / or the second coupling element have force-acting surfaces which, in the coupling position, can come into contact or are in contact with one another or with the blocking element. The active force surfaces serve to transmit a main part of a torque, which acts on one of the rocker arm parts, in the coupling position.
In a further advantageous embodiment of the valve actuation device, the force-acting surfaces are planes, which each include an angle β with an amount less than approximately 10 ° and a radial plane in which the axis of rotation and the first pivot axis lie, and are preferably arranged at least substantially parallel to the radial plane , This ensures that the coupling elements block each other in the coupling position.
In a further advantageous embodiment of the valve actuation device, the force-acting surfaces are arranged on a side of the coupling elements facing away from the axis of rotation. This also blocks the
Coupling elements reinforced in the coupling position.
In a further advantageous embodiment, the locking element is a ball and the force effective surface of the first coupling element and / or the force effective surface of the second coupling element are spherical and arranged in such a way that they interact with the locking element.
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In a further advantageous embodiment of the valve actuation device according to the invention, the blocking element is a cylindrical element and the force-acting surface of the first coupling element and / or the force-acting surface of the second coupling element are hollow-cylindrical and arranged in such a way that they interact with the blocking element.
In a further advantageous embodiment of the valve actuation device according to the invention, the blocking element is formed in one piece with the first coupling element or with the second coupling element.
In a further advantageous embodiment of the valve actuation device according to the invention, the first rocker arm part has a first doffer, in particular a roller doffer, to grip a contour of a first cam, and the second rocker arm part has a valve tappet to actuate the at least one valve, the
Valve actuation device is set up to transmit a valve control movement from the first cam to the at least one valve. The valve tappet is preferably designed as a valve bridge, or there is an additional valve bridge in order to actuate two valves.
In a further advantageous embodiment of the valve actuation device, the second rocker arm part has a second pickup, in particular a roll pickup, in order to tap a contour of a second cam. In this case, the valve control movement of the second cam is continuously transmitted to the valve tappet via the second rocker arm part. In addition, a second can via the first rocker arm part and the coupling elements
Valve control movement can be transmitted from the first cam to the valve lifter.
In a further advantageous embodiment, which is alternative to the previous advantageous embodiment, the valve actuation device has a third rocker arm with a pivotable / 63
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Rocker arm part and / or a second valve control movement are transmitted from the second cam via the third rocker arm part and the second rocker arm part to a valve.
In a further advantageous embodiment of the valve actuation device, the first rocker arm part is at least in the decoupling position by a first one
Resetting element can be pretensioned against the first cam and / or the second or third rocker arm part can be pretensioned against the second cam at least in the decoupling position by a second resetting element. This can ensure that a valve pickup is in constant contact with the respective cam. This has the advantage that no shocks occur due to the valve pickup contacting the cam again, which generates a lot of noise and would result in wear of the cam and / or the pickup.
The features and advantages described in relation to the valve actuation device according to the invention also apply to an inventive one
Method of actuating a valve actuation device and vice versa. In the method according to the invention, starting from a coupling position of the first and second rocker arm parts, during a first step, during which the first and second rocker arm parts are preferably free of force, the coupling elements are replaced by a
Actuating device pivoted into a decoupling position, and in a / 63
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Further features and advantages result from the description of the embodiments with reference to the figures. At least partially, they show schematically:
Fig. 1 a perspective view of a first embodiment of a valve actuation device according to the invention; 10 Figs. 2 and 3 Side views of a valve actuation device according to Figure 1 in the coupling position. 4 and 5 Side views of a valve actuation device according to Figure 1 in the decoupling position. 6 and 7 Side views of a second embodiment of a 15 valve actuation device according to the invention inCoupling position; 8 and 9 Side views of the second embodiment of the valve actuation device according to the invention inuncoupling; 20 Fig. 10 (a) - (e) different views of a first exemplary embodiment of an entirety of the first joint and the coupling elements for the first or second embodiment of the inventionValve actuator; 25 Fig. 11 (a) - (e) different views of a second embodiment of an entirety of the first joint and the
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Coupling elements for the first or second embodiment of the invention
Valve actuator;
Fig. 12 (a) - (e) different views of a third embodiment 5 of an entirety of the first joint and the
Coupling elements for the first or second embodiment of the invention
Valve actuator;
13 (a) - (c), (d-1), (d-2), (e) different views of a fourth embodiment of an assembly consisting of the first joint and the coupling elements for the first or second embodiment of the invention
Valve actuator;
14 (a) - (d) different views of a fifth exemplary embodiment 15 of an entirety of the first joint and the
Coupling elements for the first or second embodiment of the invention
Valve actuator;
15 and 16 are side views of a third embodiment of the valve actuation device according to the invention;
17 (a) - (d) show different views of a sixth exemplary embodiment of an assembly consisting of the first joint and the coupling elements for the third embodiment of the valve actuation device according to the invention;
18 and 19 are side views of a fourth embodiment of the valve actuation device according to the invention;
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Fig. 20
21 is a perspective view of a variant of the first embodiment of the invention
Valve actuation device with a switchable valve lever and a fixed valve lever; and a perspective view of a further variant of a first embodiment of the valve actuation device according to the invention with two switchable valve levers.
1 shows a first embodiment of a valve actuation device 1 according to the invention. Comparable elements are denoted by the same reference symbols in all the figures.
1 has a first rocker arm part 2 and a second rocker arm part 4, which together form a valve lever, in the embodiment shown a so-called
Form rocker arm, with which a valve control movement, which is predetermined by a contour of a first cam 19, can be passed on to a valve lifter 20 or a valve bridge, which actuate at least one intake or exhaust valve of an internal combustion engine.
In order to decrease the movement predetermined by the contour of the cam 19, the first rocker arm part 2 preferably has a pickup roller 18, which is further preferably rotatably mounted on the second rocker arm part 2. Furthermore, the second rocker arm part 2 is preferably provided with a reset element 26, in the embodiment shown in FIG. 1
Return spring 26, with the take-up roller 18 pressed against the contour of the cam 19. The return spring 26 is preferably supported on the housing of the internal combustion engine, which preferably supports the valve actuation device 1.
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The first valve lever part 2 and the second valve lever part 4 are rotatably mounted about a common axis of rotation 6, preferably on a common axis.
The first valve lever part 2 has a first coupling element 3, which is pivotably attached to the first valve lever part 2 by means of a second joint 8. The second valve lever part 4 also has a second coupling element 5, which is preferably also pivotably attached to the second valve lever part 4 via a third joint 9.
The first coupling element 3 and the second coupling element 5 are preferably connected by means of a joint 7, so that the first coupling element 3 and the second coupling element 5 can also be pivoted relative to one another.
The joint 7 is preferably realized by respective receptacles in the first coupling element 3 and in the second coupling element 5, which are coupled to one another in a pivotable manner by means of a locking element 12, a ball (not visible) in the embodiment in FIG. 1.
Furthermore, the valve actuating device 1 preferably has an actuating device 11, which in the embodiment of FIG. 1 is formed by a disk. The disk 11, like the first rocker arm part 2 and the second rocker arm part 4, is preferably arranged concentrically with the common axis of rotation 6 and can also, preferably independently of the first rocker arm part 2 and / or the second rocker arm part 4, be rotated about the common axis of rotation 6 become.
The actuator 11 is on the same axis as the first
Rocker arm part 2 and the second rocker arm part 4 are preferably mounted by means of a kind of hollow shaft.
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The disk 11 has two areas with different outer radii r1, r2.
Both the disk 11 has a running surface 28, and preferably a doffer of the first coupling element 3 has a running surface 29.
The running surface 28 of the actuating disk 11 and the running surface 29 of the bolt can cooperate in order to bring the coupling elements 3, 5 into defined positions.
The second coupling element 5 is likewise provided with a restoring spring by a restoring device 10 in the embodiment shown, in such a way that the second coupling element, and thus also the first coupling element 3, is biased radially inwards towards the common axis of rotation 6 are. This prestress defines a normal position of the coupling elements 3, 5, which corresponds to the coupling position in the embodiment shown. Alternatively or additionally, the resetting device could also act on the first coupling element 3, for example as a second resetting spring.
In the arrangement of the actuating disk 11 shown in relation to the bolt 12, the joint 7 and thus also the two ends of the coupling elements 3, 4 pointing towards one another are in a coupling position, since the
Tread 29 of the bolt 12 lies on a region of the actuating disc 11 which has a small radius r1. If the running surface 29 of the bolt 12 were in contact with the running surface 28 of the actuating disk 11 in the region of the larger radius r2 of the actuating disk 11, the joint 7 and thus the two ends of the first one pointing towards each other would
Coupling element 3 and the second coupling element 5 pushed radially outward from the common axis of rotation 6, as a result of which they would assume a decoupling position.
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FIGS. 2 and 3 show the first embodiment of the valve actuation device according to the invention according to FIG. 1 in a side view, the coupling elements 3, 5 being in the coupling position.
2, the actuating disc 11 is in a rotational position in which the running surface 29 of the first coupling element 3 interacts with the small radius r1 of the running surface 28. As a result, the first coupling element 3 and the second coupling element 5 are blocked against one another, as a result of which the first rocker arm part 2 and the second rocker arm part 4 are coupled for common rotation about the common axis of rotation 6.
2, the first cam 19 is in a position in which the roller pickup 18 of the first rocker arm part 2 lies against a small radius of the first cam 19. 3, on the other hand, the first cam 19 is rotated such that the roller pickup 18 rests in an area of the contour of the first cam 19 in which it has a large radius and thus the first rocker arm 2 and thus the second rocker arm coupled for rotation therewith Rocker arm part 4 rotated about the common axis of rotation 6, so that on the one hand the valve tappet 20 actuates a valve (not shown) and on the other hand the restoring element 26 is compressed.
FIGS. 4 and 5 show two further side views of a valve actuation device 1 according to the invention in accordance with the first embodiment according to FIG. 1, in contrast to FIGS. 2 and 3 the first rocker arm part 2 and the second rocker arm part 4 being decoupled from one another.
FIG. 4 corresponds to the situation shown in FIG. 2 with respect to the first cam 19, that is to say the pickup roller 18 lies against the contour of the first cam 19 in an area in which it has a small radius.
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In contrast to FIG. 2, the actuating disk 11 of the valve actuating device 1 is in a rotational position with respect to the first joint 7 or the ball 12 of the first joint 7, in which the tread 29 of the first coupling element 3 is in a region of the tread 28
Operating disc is arranged in which it has its large radius r2. 4, the bolt 12 and thus the first joint 7 and the adjoining ends of the coupling elements 3, 5 are pressed radially outward from the common axis of rotation 6. As a result, the first coupling element 3 and the second coupling element 5 rotate relative to one another and the two coupling elements 3, 5 are in a folded position.
If the trolley 18 now moves on the contour of the first cam 19 in the direction of the region of the large radius of the cam 19, the first rocker arm part 2 begins to rotate about the common axis of rotation 6 in
To turn clockwise. Since the valve or the valves (not shown) exert a resistance on the first rocker arm part 4 via the valve tappet 20 and / or a valve bridge (not shown) and the coupling elements 3, 5 are in a decoupling position, the rotational movement of the first rocker arm part 2 does not become clockwise passed on to the second rocker arm part 4, but the first coupling element 3 and the second coupling element 5 continue to rotate against each other and form a folded position so that the first rocker arm part 2 approaches the second rocker arm part 4. The movement induced by the first cam 19 therefore does not result in one in the situation of FIG. 4
Valve control movement, but is absorbed by the entirety of the two coupling elements 3, 5 and the first joint 7, the second joint 8 and the third joint 9.
FIGS. 6 to 9 relate to a second embodiment of the valve actuation device 1 according to the invention.
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In contrast to the first embodiment shown in FIGS. 1 to 5, the coupling elements 3, 5 are displaced radially from the common axis of rotation 6 by a resetting device (not shown), in particular a spring, or a resetting device in each case
Valve actuating device 1 pressed outwards.
The normal position of the coupling elements 3, 5 in the second embodiment shown here is therefore a decoupling position, as shown in FIGS. 8 and 9 in a side view of the second embodiment of the valve actuation device 1 according to the invention. The coupling position, in which a valve control movement is transmitted from the first cam 19 to the valve lifter 20 via the first rocker arm part 2 and the second rocker arm part 4, is achieved, as in FIGS. 6 and 7, by the fact that the actuating device 11 in the present case Embodiment is a role, for example, movably mounted on the housing of the internal combustion engine.
The actuating device 11 is pressed to effect the coupling position, as shown in FIGS. 6 and 7, on an outer surface of the first coupling element and / or the second coupling element 5, so that the entirety of the first coupling element, the first joint 7 and the second coupling element 5 in the direction the common axis of rotation 6 is pressed.
The coupling position can be maintained on the one hand by the contact pressure of the actuating device 11, alternatively it can also be provided in the coupling position that the first coupling element
3 and the second coupling element 5 mutually in the coupling position when
Block the action of a torque on the valve lever 2, 4.
In FIGS. 8 and 9, which correspond to FIGS. 4 and 5 in relation to the first embodiment, the actuating device 11 is not in contact with the first coupling element 3 and / or the second / 63
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Coupling element 5, so that the coupling elements 3, 5 are brought into the normal position of a decoupling position by the resetting device. If, as shown in FIG. 9, the first rocker arm part 2 is now rotated by the large radius of the first cam 19, there is a relative movement between the first rocker arm part 2 and the second rocker arm part 4, since the first coupling element 3 and the second coupling element 5 swivel against each other or folded.
With reference to FIGS. 10 to 14 and FIG. 17, four exemplary embodiments for assemblies with first coupling element 3 and second are shown
Coupling element 5 and first joint 7 explained. A partial figure (a) shows a side view, a partial figure (b) a perspective view, the partial figures (c), and (d) (or in FIG. 13 the partial figures (d-1) and (d2)) perspective Views of the two coupling elements 3, 5 and a partial figure (s), as far as a separate element in each
Embodiment available, a locking element 12.
10 shows various views of a first exemplary embodiment of an assembly comprising the first coupling element 3, the second coupling element 5, the first joint 7, the second joint 8 and the third joint 9. This unit can be used in valve actuation devices 1 of the first embodiment or the second embodiment according to FIGS 9 are used.
10a shows the entirety in an arrangement which corresponds to the coupling position. In this case, the respective force-acting surfaces 16 of the first coupling element 3 and the force-acting surfaces 17 of the second coupling element 5 shown in FIGS. 10c and 10d are in abutment.
In this case, the angle α, which in the installed state would lie on the side of the common axis of rotation 6 of a valve actuation device 1, is between a plane which is spanned by a first pivot axis 13 of the first joint 7 and a second pivot axis 14 of the second joint 8, and a level defined by the first / 63
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Pivot axis 13 of the first joint 7 and the third pivot axis 15 of the third joint 9 is spanned more than 180 °.
The angle shown in FIG. 10a is 185 °, for example.
Acts between the second joint 8 and the third joint 9
Torque, for example when a cam causes rotation of the first rocker arm part 2 of the valve actuation device 1, the arrangement of the first pivot axis 13 with respect to the second pivot axis 14 and the third pivot axis 15, which is defined by the previously defined planes, results in a blockage of the first
Coupling element 3 by interacting with the second coupling element 5.
The angle β between the arrangement of the force surfaces and a radial plane in which the axis of rotation 6 and the common pivot axis 13 lie is preferably less than 10 °.
FIG. 11 shows a further exemplary embodiment of an assembly according to FIG. 10, which can be used in a valve actuation device 1 according to the first embodiment or the second embodiment according to FIGS. 1 to 9. The main difference from the embodiment of FIG. 10 is that the first
Coupling element 3 has tabs 30a, 30b, which together with the bolt 12 from FIG. 11e and the bore 31 of the second coupling element 5 in FIG. 11d form the first joint 7. In contrast to FIG. 10, these tabs 30a, 30b of the first coupling element 3 have elongated recesses 32a, 32b. This allows the bolt 12 in the
Shift the direction of the recesses 32a, 32b.
In cooperation with reset elements 26, 27, as shown in FIGS. 1 to 9, in the unloaded state of a valve lever this can result in a valve play and thus the lifting of a roller pickup 18 from the contour / 63
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The consequence of this is that the entire valve lever comprising the first rocker arm part 3 and the second rocker arm part 4 is lengthened, so that a pickup 18 is prevented from being lifted off the cam.
FIG. 12 shows various views of a third exemplary embodiment of an assembly as it is also shown in FIGS. 10 and 11.
The third exemplary embodiment of FIG. 12 differs from the second exemplary embodiment of FIG. 11 in particular in that the force effective surface 17 around the bore 31 of the second coupling element 5 is designed as a cylinder and the corresponding force effective surface 16 of the first coupling element 3 is designed as a partial hollow cylinder as shown in Fig. 12e.
This has the advantage that the force effective surface 17 is as close as possible to an imaginary connecting line between the joints 8, 9 of the
Coupling elements 3, 5 is arranged.
13 shows various views of a fourth exemplary embodiment of a
Whole, as is also shown in Figures 10 to 12. The fourth embodiment of FIG. 13 differs from the second embodiment of FIG. 11 and the third embodiment of FIG. 12 in particular in that the locking element 12 shown in FIG. 13e is designed as a ball. This ball 12 is also elongated
Recesses 32a, 32b received in tabs 30a, 30b of the first coupling element 3. In the second coupling element 5, the ball 12 is inserted in two bores 31a, 31b arranged opposite one another (not visible since / 63
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In the fourth exemplary embodiment according to FIG. 13, as shown in FIGS. 13d-1, the force active surface is formed on the one hand by the surface 17 of the ball and on the other hand by a likewise spherically shaped hollow surface 16a of the first coupling element 3 and a likewise spherically shaped hollow surface 16b (not visible, because covered by the ball 12) of the second coupling element 5. However, the spherical force effective surface 16b is visible in the view according to FIGS. 13d-2 without a ball 12.
FIG. 14 shows various views of a fifth exemplary embodiment of an assembly as it is also shown in FIGS. 10 to 13.
The entirety of the fifth exemplary embodiment according to FIG. 14 differs from the third exemplary embodiment according to FIG. 13 in particular in that the locking element 12, which in both
Embodiments is designed as a ball, in which Fig. 14 is firmly connected to the second coupling element.
This ball 12 is guided in a recess 32, which is closed on three sides, in the first coupling element 3, wherein, as in the exemplary embodiments in FIGS. 11 to 13, displacement of the ball in the recess 32 is also possible in order to lift the roller holder 18 from to avoid the cam. As in the fourth exemplary embodiment of FIG. 13, as shown in FIG. 14c, the force effective surface 16 of the first coupling element 3, which cooperates with the force effective surface 17 of the ball 12, is spherical.
FIGS. 15 and 16 show two side views of a third embodiment of the valve actuation device 1 according to the invention. In contrast to the first and second embodiments, the first coupling element 3 and the second coupling element 5 are in this third / 63
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Embodiment not firmly connected. In this way, as shown in FIG. 16, continuous contact between the roller and cam can be ensured by forming a gap S between the first rocker arm part 2 and the second rocker arm part 4, in particular between their first coupling element 3 and their second coupling element 5 ,
A whole of the first coupling element 3 and the second coupling element 4 is shown here in FIG. 17 from different perspectives with reference to the third embodiment.
The first joint 7 is in the totality shown by a cylinder
12 is formed, which is a fixed component of the second coupling element 5, and part of a hollow cylinder with the force effective surface 16, which is part of the first coupling element 3. The force active surfaces 16, 17 shown in FIGS. 17c and 17d interact accordingly.
The person skilled in the art knows that the respectively interacting elements of the first rocker arm part 2 and the second rocker arm part 4 could be interchanged. In particular, the recesses 32, 32a, 32b and the bores 31, 31a, 31b and also an arrangement of the respective locking element 12 could each be interchanged.
FIGS. 18 and 19 show a fourth embodiment of a valve actuation device 1 according to the invention. This differs from the first, second and third embodiment in particular in that the actuation device 11 is a detent element, which has a corresponding detent on the second coupling element 5 of the second rocker arm part 4 interacts.
18 shows a coupling position in which the latching element 11 engages with the latch 33 and thus prevents the first coupling element 3 and the second coupling element 5 from pivoting or folding relative to one another. This position therefore represents a coupling position in which a / 63
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Valve control movement is transmitted from the first cam 19 to the valve lifter 20.
18, the locking element 11 is in a position in which it does not engage with the locking 33 of the second coupling element. Since the angle α in the locked position in FIG. 18 is less than 180 °, which corresponds to a decoupling position, the coupling elements 3, 5 are pivoted against one another when a rotation acts on the first rocker arm part 2, so that a valve control movement is not transmitted here either ,
19 shows the coupling elements 3, 5 in the pivoted position.
Of course, the person skilled in the art knows that the latching element 11 could also be arranged in the first rocker arm part 2 and could cooperate there with a latch arranged on the first coupling element 3 in order to achieve the coupling position.
FIG. 20 shows a variant of the first embodiment of the valve actuation device 1 according to FIG. 1. In this embodiment, the second rocker arm part 4 is not only designed as a second half of a valve lever, which comprises the first rocker arm part 3 and the second rocker arm part 4, but the second rocker arm part Instead, 4 additionally forms a valve lever, which has no variable valve lift.
As a result, not only can a valve control movement generated by the first cam 19 be transmitted to the valve tappet 20 with a variable valve lift via the first roller customer 18, but in addition a valve control movement which is caused by the second cam 22 is transmitted via the second roller customer 21 and the second Rocker arm part 4 permanently transferred to the valve lifter 20.
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20, two different valve control movements can be transmitted in this way, only one having a variable valve lift.
FIG. 21 shows a further variant of the valve actuation device 1 in the first embodiment according to FIG. 1.
In contrast to the second variant according to FIG. 20, the valve actuation device 1 has a third rocker arm part 23, which comprises a third coupling element 24. The second rocker arm part 4 has a fourth, in addition to the second coupling element 5
Coupling element 25.
The third coupling element 24 and the fourth coupling element 25 interact in a similar manner to the first coupling element 3 and the second coupling element 5. Thus, the valve control movement caused by the second cam 22 can also be carried out, in contrast to the second
20, can be transmitted with a variable valve lift, depending on whether the third and fourth coupling elements 24, 25 are in a coupling position or in a decoupling position.
To actuate this variable valve lift, the valve actuation device 1 has a further actuation disc 11b, in addition to an actuation disc 11a, which actuates the entirety of the first coupling element 3, the second coupling element 5 and the first joint 7 (not visible in FIG. 21 because it is covered).
Accordingly, the valve actuation device 1 according to FIG. 21 has a second reset element 27, which prestresses the third rocker arm part 23 against the second cam 22. Such a second reset element 27 could of course also be provided in the second variant according to FIG. 20.
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It is pointed out that the teaching according to the invention can also be implemented in a large number of modifications of the embodiments, exemplary embodiments and variants described above.
In particular, the other embodiments of the valve actuating device 1, which are shown in FIGS. 6 to 9, in FIGS. 15 and 16 and in FIGS. 18 and 19, as well as other exemplary embodiments of the assemblies comprising the coupling elements 3, 5, which are shown in FIGS 14 are shown in
Valve actuation devices 1 for transmitting a plurality of valve control movements, as shown in FIGS. 20 and 21, are used and thereby form further variants of the valve actuation device 1 according to the invention.
The valve actuation device 1 according to the invention can also be used with overhead camshafts as well as with underlying camshafts.
In addition, it should be pointed out that the embodiments, exemplary embodiments and variants presented above are merely examples which are not intended to restrict the scope of protection, the application and the structure in any way. Rather, the person skilled in the art is given a guideline for the implementation of at least one exemplary embodiment by the preceding description, it being possible for various changes, in particular with regard to the function and arrangement of the described components, to be carried out without leaving the scope of protection as it is the claims and these equivalent combinations of features.
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1235 45678th10 9 LIST OF REFERENCE NUMBERSValve actuatorFirst rocker armFirst coupling elementSecond rocker arm partSecond coupling elementaxis of rotationFirst jointSecond jointThird joint
Reset device
11, 11a, 11b actuating device
121315 1415 blocking elementFirst pivot axisSecond swivel axisThird pivot axis
16, 16a, 16b force effective area of the coupling elements 17 force effective area
1820 192021222325 2425262728, 2930 30a, 30b First customerFirst camtappetSecond customerSecond camThird rocker arm partThird coupling elementFourth coupling elementFirst reset elementSecond reset elementtreadflap
31,31a, 31b bore
32, 32a, 32b recess
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1.
Second
Third
4th

权利要求:
Claims (13)
[1]
claims
Valve actuating device (1) for actuating at least one valve of a reciprocating piston machine with variable valve lift, in particular an internal combustion engine, comprising:
a first rocker arm part (2) with a pivotable first coupling element (3), a second rocker arm part (4) with a pivotable second coupling element (5), the first rocker arm part (2) and the second rocker arm part (4) both being rotatable about a common axis of rotation (6) are mounted, and wherein a rotary movement about the common axis of rotation (6) can be transmitted between the first rocker arm part (2) and the second rocker arm part (4) when the first coupling element (3) and / or the second coupling element (5) are in a coupling position.
The valve actuation device (1) according to claim 1, wherein the first rocker arm part (2) and the second rocker arm part (4) form a foldable valve lever to absorb rotary motion from one of the rocker arm parts (2, 4) when the first coupling element (3) and / or the second coupling element (5) is in a decoupling position.
Valve actuation device (1) according to claim 1 or 2, wherein the first coupling element (3) and the second coupling element (5) are coupled, in particular connected, by a first joint (7).
Valve actuation device (1) according to one of the preceding claims, wherein the first coupling element (3) with the first rocker arm part (2) by a second joint (8) and the second
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Coupling element (5) are connected to the second rocker arm part (4) by a third joint (9).
5. Valve actuating device (1) according to one of the preceding claims, wherein the first coupling element (3) and / or the second
5 coupling element (5) are prestressed by a resetting device (10), in particular at least one spring.
6. Valve actuating device (1) according to one of the preceding claims, further comprising an actuating device (11), which is set up around at least one of the coupling elements
10 (3, 5), in particular via the first joint (7).
7. The valve actuating device (1) according to claim 6, wherein the actuating device (11) is set up to decouple the rocker arm parts (2, 4) in the radial direction with respect to the axis of rotation (6) or to couple the rocker arm parts (2, 4)
15 to act in the radial direction inwards with respect to the axis of rotation (6) on the at least one of the coupling elements (3, 5).
8. Valve actuation device (1) according to claim 6 or 7, wherein the
Actuator (11) is set up, the two
Coupling elements (3, 5) against a bias
20 reset device (10), in particular at least one spring, into the
Push coupling position.
9. valve actuating device (1) according to claim 6 or 7, wherein the
Actuator (11) is set up, the two
Coupling elements (3, 5) against a bias
25 to hold the resetting device (10), in particular at least one spring, in a decoupling position in such a way that a rotary movement of one of the rocker arm parts (2, 4) causes the coupling elements (3, 5) to pivot relative to one another and in relation to the rocker arm parts (2 , 4) can cause.
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10. Valve actuating device (1) according to one of claims 6 to 9, wherein the actuating device (11) has a, in particular coaxially arranged with the rocker arm parts (2, 4), which has on its circumference at least two different radii (r1, r2) having,
5 a first, smaller radius (r1) for realizing the coupling position of the coupling elements (3, 5) and a second, larger radius (r2) for realizing a decoupling position of the coupling elements (3, 5), the disc preferably independent of the rocker arm parts ( 2, 4) about the axis of rotation (6) is rotatable.
10 11. Valve actuator (1) according to claim 6, wherein the
Actuating device (11) is a latching device and the at least one coupling element has a notch (33) which, when they cooperate, are configured to at least one coupling element (3, 5) in a defined position, in particular in
15 the coupling position or a decoupling position.
12. Valve actuating device (1) according to any one of the preceding claims, wherein the coupling elements (3, 5) are designed in such a way to in relation to their pivoting movement when a torque is applied to the rocker arm parts 2, 4 in the
20 mutually blocking position.
13. Valve actuation device (1) according to one of claims 4 to 12, wherein a first plane, in which a second pivot axis (14) of the second joint (8) and a first pivot axis (13) of the first joint (7) lie, and a second level, in which a third
25 pivot axis (15) of the third joint (9) and the first
The pivot axis (13) of the first joint (7) lie, in the coupling position on one side facing the axis of rotation (6) to each other an angle α of more than 180 °, preferably at least about 185 °.
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14. Valve actuation device (1) according to one of claims 4 to 12, wherein a first plane, in which a second pivot axis (14) of the second joint (8) and a first pivot axis (13) of the first joint (7) lie, and a second level, in which a third
5 pivot axis (15) of the third joint (9) and the first
The pivot axis (13) of the first joint (7) lie, in the coupling position on one side facing the axis of rotation (6) to each other an angle α of less than 180 °, preferably at most about 175 °.
15 15. Valve actuation device (1) according to one of claims 3 to 14, wherein the first joint (7) has a locking element (12), in particular a bolt or a ball, which is mounted on both coupling elements (3, 5) and the relative position of the two coupling elements (3, 5) to each other at least in the
15 Coupling position defined.
16. The valve actuation device (1) according to claim 15, wherein the locking element (12) on at least one of the coupling elements (3, 5) is displaceable, in particular in an elongated recess (32, 32a, 32b), in particular in such a way that between the
20 first coupling element (2) and the second coupling element (4) and / or between the locking element (12) and the first or second coupling element in the coupling position can form a gap (S).
17. Valve actuating device (1) according to one of the preceding
25 Claims, wherein the first coupling element (3) and / or the second
Coupling element (5) have force-acting surfaces (16, 17) which, in the coupling position, can come into contact or are in contact with one another or with the locking element (12).
18. Valve actuator (1) according to claim 17, wherein the
30 active force surfaces (16, 17) are planes, which each have an angle β
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5 19. Valve actuator (1) according to claim 17 or 18, wherein the
Force active surfaces (16, 17) are arranged on the side of the coupling elements (3, 5) facing away from the axis of rotation (6).
20. Valve actuation device (1) according to one of claims 15 to 19, wherein the locking element (12) is a ball and the force effective surface
10 (16a) of the first coupling element (3) and / or the force effective surface (16b) of the second coupling element (5) are spherical and are arranged in such a way that they interact with the locking element (12).
21. Valve actuating device (1) according to one of claims 15 to 19,
15 wherein the locking element (12) is a cylindrical element and wherein the force effective surface (16) of the first coupling element (3) and / or the force effective surface (17) of the second coupling element (5) is hollow cylindrical and are arranged in such a way as to the locking element (12) cooperate.
22. The valve actuating device (1) according to one of claims 15 to 21, wherein the locking element is formed in one piece with the first coupling element or with the second coupling element.
23. Valve actuating device (1) according to one of the preceding claims, wherein the first rocker arm part (2) has a first customer
25 (18), in particular a trolley, to tap a contour of a first cam (19) and the second rocker arm part (4) has a valve tappet (20) to actuate the at least one valve, the valve actuating device (1) being set up is a
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To transmit valve control movement from the first cam (19) to the at least one valve.
24. The valve actuation device (1) according to claim 23, wherein the second rocker arm part (4) has a second pickup (21), in particular one
5 trolley, to tap a contour of a second cam (22).
25. Valve actuation device (1) according to claim 23, a third rocker arm part (23) with a pivotable third coupling element (24) and a second pickup (21), in particular one
10 trolleys, comprising to tap a contour of a second cam (22), the second rocker arm part (4) additionally having a pivotable fourth coupling element (25), the third rocker arm part (23) also being rotatable about the axis of rotation (6) 15 and a rotary movement between the third rocker arm part (23) and the second rocker arm part (4) can be transmitted when the third coupling element (24) and the fourth coupling element (25) are in a coupling position.
26. Valve actuating device (1) according to one of claims 23 to 25,
20, wherein the first rocker arm part (2) can be pretensioned against the first cam (19) at least in the decoupling position by a first reset element (26) and / or the second or third rocker arm part (4; 24) in each case at least in the decoupling position by a second reset element (27) against the second cam (22) is biased.
27. The method of actuating a valve actuation device (1) according to one of claims 1 to 26, wherein, starting from a coupling position of the first and second rocker arm parts (2, 4) in a first step, during which the first and second rocker arm parts (2, 4) are preferably free of force,
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5 defined end position can be pivoted.
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1.15
Fig.l
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13 12
Fig. 11
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13 5
Fig. 13
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DE102020123529A1|2022-03-10|rocker arm device

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DE202018103827U1|2018-07-16|Switchable drag lever for a valve train of an internal combustion engine

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DE102020117726A1|2021-01-07|Variable valve train device

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DE102020123951A1|2022-03-17|Rocker arm device and actuator

同族专利:

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公开号 | 公开日

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JP2020516804A|2020-06-11|

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AT519812B1|2019-07-15|

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DE112018001882A5|2020-01-02|

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WO2018185197A1|2018-10-11|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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JP2004100555A|2002-09-09|2004-04-02|Toyota Motor Corp|Variable valve mechanism of internal combustion engine|

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DE10358924A1|2002-12-17|2004-07-08|Mitsubishi Jidosha Kogyo K.K.|Valve system for an internal combustion engine|

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DE102008058897A1|2008-03-27|2009-10-01|Hyundai Motor Co.|Device for achieving a variable valve lift|

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JP3388634B2|1994-06-15|2003-03-24|本田技研工業株式会社|Valve train for internal combustion engine|

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AT511050A1|2011-01-27|2012-08-15|Avl List Gmbh|Combustion engine with a variable valve actuator|

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DE102013215946A1|2013-08-12|2015-02-12|Avl List Gmbh|Valve operating device for changing the valve lift|

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WO2016059456A1|2014-10-15|2016-04-21|Shanghai Universoon Auto Parts Co., Ltd.|Engine braking method and system|

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US9926816B2|2015-07-09|2018-03-27|Schaeffler Technologies AG & Co. KG|Switchable rocker arm with pivot joint|TWI693337B|2019-03-11|2020-05-11|趙秀雄|Engine valve actuation mechanism|

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DE102019119870A1|2019-07-23|2021-01-28|Man Truck & Bus Se|Variable valve train for an engine braking mode|

法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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ATA50281/2017A|AT519812B1|2017-04-05|2017-04-05|Mechanical valve actuator|ATA50281/2017A| AT519812B1|2017-04-05|2017-04-05|Mechanical valve actuator|

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JP2019554871A| JP2020516804A|2017-04-05|2018-04-05|Mechanical valve operating device|

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PCT/EP2018/058671| WO2018185197A1|2017-04-05|2018-04-05|Mechanical valve actuating device|

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DE112018001882.2T| DE112018001882A5|2017-04-05|2018-04-05|MECHANICAL VALVE ACTUATOR|