• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a length-adjustable connecting rod (1) for a reciprocating engine, in particular for an internal combustion engine, with at least a first rod part (2) and a second rod part (4), which two rod parts (2, 4) relative to each other in the direction of a longitudinal axis (1a ) of the connecting rod (1) are displaceable and connected to one another via a helical gear (6), wherein the helical gear (6) has at least a first gear part (7) and a second gear part (8) which is in engagement with the first gear part (7), wherein the first gear part (7) as a spindle nut (9) or threaded spindle (10) and the second gear part (8) as a threaded spindle (10) or as a spindle nut (9) is formed and first (7) and second gear part (8 ) are formed coaxially with respect to a common parallel to the longitudinal axis (1 a) of the connecting rod (1) arranged screw axis (11), wherein the helical gear (6) is non-self-locking un d) the first gear part (7) can be brought into contact with at least one turnstile device (20) which can be switched by means of at least one switching device (30), which turnstop device (20) prevents the first gear part (7) from rotating in at least one blocking position (A1, A2) and in at least one movement position (B; A) allows. To enable a rapid and reproducible length adjustment and locking the Drehsperreinrichtung (20) by at least one wedge element (21) is formed on a coaxial with the screw axis (11) in the first rod part (2) extending cam track between the at least one blocking position (A) and the at least one movement position (B) about the helical gear (6) is movable.
    公开号:AT518265A4
    申请号:T50498/2016
    申请日:2016-05-31
    公开日:2017-09-15
    发明作者:Greylinger Wilhelm
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    Connecting rod with hydraulic clamping wedge
    The invention relates to a length-adjustable connecting rod for a reciprocating engine, in particular for an internal combustion engine, with at least a first rod part and a second rod part, which two rod parts relative to each other in the direction of a longitudinal axis of the connecting rod displaceable and connected via a helical gear, wherein the helical gear at least one the first gear part and a second gear part engaging with the first gear part, wherein the first gear part is designed as a spindle nut or threaded spindle and the second gear part as a threaded spindle or spindle nut and the first and second gear part coaxial with respect to a common parallel to the longitudinal axis of the Connecting rod arranged screw axis are formed, wherein the helical gear is non-self-locking and the first gear part with at least one switchable by means of at least one switching device D. rehsper device can be brought into contact, which prevents rotation locking device in at least one blocking position, a rotation of the first gear part and allows in at least one movement position. The invention also relates to a reciprocating engine, in particular internal combustion engine, with at least one such connecting rod.
    Hydraulically actuated, length-adjustable connecting rods have the disadvantage that the oil is to some extent compressible, the compressibility depending on physical parameters of the oil, such as: the gas content, the modulus of compression and the toughness. This compressibility of the oil can lead to vibrations that can lead to premature wear of already loaded by very high pressure components, such as the seals. These vibrations also lead to an increase in the oil temperature.
    From the documents WO 06/115898 Al, US Pat. No. 5,406,911 A, GB 441 666 A it is known to mechanically adjust the length of connecting rods by helical gears. In each case, the piston is rotated over its toothed piston skirt or via a thread in the region of the piston skirt, which in addition to leakage problems also brings a very complex production with it.
    At length-adjustable connecting rods, which change the length of the connecting rod with a self-locking thread, a torque must act to rotate the two gear parts of the helical gear relative to each other. This relative rotation can be done with coarse thread and / or helical gears having further helical gear or hydraulic rotary valves. Since the adjustment can only be made in the very short time periods in which the rod is low-loaded or load-free, the self-locking must be sufficient to allow adjustment only in the desired direction. The disadvantage is that an additional rotary drive is required, which requires increased space requirements and production costs.
    In the Austrian patent application A 50725/2015 the applicant a length-adjustable connecting rod for a reciprocating engine with a non-self-locking helical gear with a first and a second gear part is proposed, locked with a designed as a pawl freewheeling switchable locking device rotation of the first gear in one direction and in the opposite direction of rotation is released. Although this design works very satisfactorily, it still requires a certain amount of space and a large number of individual parts.
    The object of the invention is to allow the simplest possible way a reproducible change in the compression ratio.
    This object is achieved with an initially mentioned length-adjustable connecting rod according to the invention that the Drehsperreinrichtung is formed by at least one wedge element which is movable on a coaxial with the screw axis in the first rod part extending cam track between the at least one blocking position and the at least one movement position to the helical gear.
    The solution according to the invention makes possible a simple and rapid adjustment, which, moreover, can only be influenced to a lesser extent by inertial forces of the components of the connecting rod which occur due to fire and / or mass forces or inertial forces occurring at high rotational speeds. As a result, a simple and reproducible adjustment of the length of the connecting rod is possible.
    In a variant of the invention, the turnstile device has a first blocking position in which a rotation of the first gear part in a first rotational direction is prevented, a second blocking position in which a rotation of the first gear part is prevented in a second, different from the first direction of rotation, on, in the movement position, a rotation in the first and in the second direction of rotation is possible. This can be realized in a simple way to extend and shorten the connecting rod. Conveniently, the curved path runs in a normal plane on the screw axis.
    In this context, a helical gear is understood to mean a gear which changes a movement of a displaceable component along a lifting axis into a rotary movement of a rotatable component about an axis of rotation or a rotational movement of a rotatable component into a translatory movement of a rotatable component is, with each other corresponding effective surfaces of the two coaxial components slide along each other. The active surfaces are removed from the common rotation or lifting axis, on the one hand in the region of the outer circumference of one - for example displaceable - component, and on the other hand in the region of the inner circumference of the other - for example rotatable - component arranged. The corresponding active surfaces have a defined pitch and can be formed by threads or by helical toothing of the components. Thus, it is provided in the context of the present invention that the threaded spindle has an external thread or an external helical toothing and the corresponding spindle nut has an internal thread or an internal helical toothing.
    The terms thread, threaded spindle and spindle nut used here are thus by no means limitative to helical thread forms, but of course include embodiments in which the thread forms are formed by helical gears.
    From a self-locking a helical gear is generally spoken when the pitch angle of the corresponding effective surfaces, so the thread flanks of the thread or helical toothing, smaller than the arc tangent of the coefficient of friction (static friction coefficient or Gleitreibzahl) of the material pairing of the first and second gear part. A self-locking is thus prevented when the pitch angle of the active surfaces of the thread or helical gearing is at least equal to or greater than the arc tangent of the friction coefficient of the material pairing of the first and second gear part.
    The fact that a self-locking of the helical gear is prevented, the acting over a relatively long time gas and inertial forces can be used to adjust the helical gear. In particular, it is possible with the gas force occurring in the internal combustion engine to shorten the length of the connecting rod and extend it with the existing mass force. These adjusting forces rotate the spindle nut or threaded spindle on the non-self-locking thread and act during each cycle constantly, with the exception of a short phase, in which there is no load.
    The Drehsperreinrichtung has the task to lock the rotation of the first gear formed by a spindle nut or threaded spindle in a blocking position and release in a movement position to selectively allow shortening or lengthening the connecting rod. In particular, the shortening or lengthening of the connecting rod should be maintained over a defined period of time.
    In a variant of the invention, the first gear part is rotatably mounted in a guide cylinder formed by the first rod part and the wedge element is movably mounted in a wedge element recess adjoining the first gear part in the circumferential direction at least partially adjacent to the guide cylinder. The rotatable mounting of the first gear part in the first rod part can be done on balls, hydrostatic or similar, low-friction manner. Conveniently, an outer wall of the wedge-element recess facing away from a jacket region of the first gear part extends essentially in a circular manner, wherein preferably the center of the circular outer wall is arranged offset from the screw axis of the helical gear. In this case, the circular recess radius of the outer wall of the wedge element recess is smaller than the radius of the jacket region of the first gear part.
    In a variant of the invention, a jacket region of the first gear part is designed to be cylindrically convex, and the wedge element has at least one preferably concave first wedge section facing the jacket region, which contacts the jacket region in at least one blocking position of the wedge element. In this case, the inner radius of curvature of the concave first wedge portion is greater than the radius of the corresponding convex jacket portion.
    A particularly good function of the turnstile device can be achieved if the wedge element has on its side facing away from a jacket region of the first gear part at least one convex wedge section, wherein the outer radius of curvature of the convex wedge section corresponds to the circle recess radius. In a variant of the invention, the wedge element on its side facing away from a jacket region of the first gear part has a first convex wedge portion and a second convex wedge portion, wherein the first convex wedge portion and the second convex wedge portion are separated by a separating edge. Here, the first outer radius of curvature of the first convex wedge portion and the second outer radius of curvature of the second convex wedge portion correspond to the circular recess radius, wherein the first wedge portion and the second wedge portion are inclined to each other.
    To implement a variant of the switching device, the wedge element has two pressure sides facing away from each other, each pressure side being adjacent to a working space defined by a jacket region of the first gear part and the outer wall of the wedge element recess. In this case, at least one working space is advantageously flow-connected to the switching device via at least one control opening, wherein the switching device releases or blocks a connection of the working space to a pressure medium source and / or sink.
    In a further variant of the invention, a first pressure side of the wedge element adjoins a first working space, which is flow-connected to the switching device via at least one first control opening and a second pressure side of the wedge element adjoins a second working space, which is flow-connected to the switching device via at least one second control opening is, wherein the switching device in a first position, the connection of the first working space with a pressure medium source and the connection of the second working space with a pressure medium sink releases and releases the connection of the first working space with a pressure medium sink and the connection of the second working space with a pressure medium source in a second position , Conveniently, the pressure medium source and / or the pressure medium sink are the connecting rod bearings of the large connecting rod eye. The pressure medium sink is, for example, the crank space surrounding the connecting rod.
    The invention is explained in more detail below with reference to the non-limiting exemplary embodiments illustrated in the figures. Show in it
    1 is a schematic representation of a connecting rod according to the invention,
    2 is a sectional view of the connecting rod according to the invention in a longitudinal section,
    Fig. 3 is a view of the connecting rod according to the invention in a section along the line A-A in Fig. 2 and
    4 is a detail view of the sectional view of Fig. 3rd
    Functionally identical parts are provided in the various figures with the same reference numerals.
    Fig. 1 shows a schematic representation of the connecting rod 1 according to the invention with a first rod part 2 with the big connecting rod 3a and a second rod part 4 with the small connecting rod 3b, wherein the large connecting rod 3a a crank pin bearing or connecting rod bearing 3 for connection to a in no further shown crankshaft and the small connecting rod 3b form a piston pin bearing for connection to a piston not shown. The rod parts 2, 4 are mutually displaceable in one direction along the longitudinal axis la of the connecting rod, wherein a helical gear 6 is provided for this length adjustment, which can be influenced via a Drehsperreinrichtung 20 in its directions of rotation. The turnstile device 20 is switchable by means of a switching device 30. The switching device 30 can be designed arbitrarily - are conceivable mechanical, hydraulic, electrical, electromagnetically or otherwise running variants. Fig. 1 indicates a hydraulic variant, wherein the switching device 30 is fluidly connected on the one hand with the connecting rod bearing 3 of the large connecting rod 3a, on the other hand with the Drehsperreinrichtung 20.
    The two rod parts 2, 4 can be moved via the helical gear 6 relative to each other in the direction of the longitudinal axis la of the connecting rod 1. The helical gear 6 shown in FIG. 2 has a first gear part 7 and a second gear part 8 engaged with the first gear part 7, in this embodiment the first gear part 7 being a spindle nut 9 and the second gear part 8 being a threaded spindle 10. The screw axis 11 of the helical gear unit 6 is arranged parallel to the longitudinal axis la of the connecting rod 1, in particular in a normal plane ε normal to the axis of rotation 12a of the large rod eye 3a formed rod bearing or normal to the axis of rotation 12b of here by the small connecting rod eye 3b defined crankpin bearing (or normal to the axis of rotation of the crankshaft) is formed. In the figures, the screw axis 11 coincides with the longitudinal axis la of the connecting rod 1.
    The spindle nut 9 has on its inside effective surfaces with a pitch which are spaced from the longitudinal axis la of the connecting rod 1 and which are formed as internal screw thread with one thread or several threads, or as internal helical teeth. Corresponding thereto, the threaded spindle 10 on its outer side corresponding active surfaces with a pitch, which are spaced from the longitudinal axis la of the connecting rod 1 and which are formed as external screw thread with one thread or multiple threads, or as external helical teeth. The thread, in particular the pitch of the thread is designed so that a self-locking is reliably avoided. Self-locking can usually be avoided if the pitch angle is greater than 7 °. On the other hand, to limit the torque occurring, the pitch angle should not be made too large. In one embodiment, an optimum pitch angle was chosen at about 8 °.
    The term "thread" (for example, in threaded spindle) is generally used here for both screw thread, and helical teeth and thus covers both training.
    The first gear part 7 formed by the spindle nut 9 is rotatably mounted, but purely axially immovable, in a guide cylinder 5 formed by the first rod part 2 and designed as a blind hole bore. This storage can be done, for example, by means of spheres, hydrostatically on an oil film or in a similar manner known to a person skilled in the art. The axial position of the first gear part 7 is limited in the direction of the small connecting rod 3b by an ababschließende the upper end of the guide cylinder 5 clamping sleeve 13, which can also act as a spacer.
    The first gear part 7 of the helical gear unit 6 is rotatable, but mounted purely axially immovable in the first rod part 2. The second gear part 8 of the helical gear unit 6 is displaceable with respect to the first rod part 2 in the direction of the longitudinal axis la, but rotatably formed and fixedly connected to the second rod part 4 or executed integrally therewith. The first gear part 7 is connectable to the switchable by means of at least one switching device 30 Drehsperreinrichtung 20, which prevents rotation of the first gear part 7 in at least one blocking position and allows in at least one movement position.
    The turnstile device 20 is formed by a wedge element 21. The wedge element 21 is mounted transversely to the screw axis 11, in particular normal to the normal plane ε, ie parallel to the axis of rotation of the crankshaft, on a coaxial with the screw axis 11 in the first rod part 2 extending cam track between the at least one blocking position and the movement position slidably in the first rod part 2. Conveniently, the Drehsperreinrichtung 20 has a first blocking position Al, in which rotation of the first gear member 7 is prevented in a first rotational direction, a second blocking position A2, in which rotation of the first gear member 7 in a second, different from the first direction of rotation is prevented , in which, in the movement position B, a rotation in the first and in the second rotational direction is made possible. Fig. 4 shows the first blocking position Al and with dotted lines the second blocking position A2. The wedge element 21 is movably mounted in a wedge element recess 100 which adjoins the first gear part 7 in the circumferential direction at least partially in the radial direction and adjoins the guide cylinder 5. Conveniently, the wedge element recess 100 surrounds the first gear part 7 over at most 180 °, ie half the circumference of the gear part.
    An outer wall 101 of the wedge-element recess 100 facing away from a jacket region 24a of the first gear part 7 runs substantially circularly, as shown in FIG. The center of the circular outer wall 101 is arranged offset from the screw axis 11 of the helical gear 6. The circular recess radius RI of the outer wall 101 of the wedge element recess 100 is smaller than the radius R of the jacket region 24a of the first gear part 7.
    As particularly shown in FIGS. 3 and 4 show the jacket portion 24a of the first gear member 7 is cylindrically convex and the wedge member 21 has at least one preferably concave, the shell portion 24a facing first wedge portion 22, which in at least one blocking position Al, A2 of the wedge member 21 the Cladding region 24a contacted. In this case, the inner radius of curvature R2 of the concave first wedge portion 22 is greater than the radius R of the corresponding convex shell portion 24a.
    In addition, the wedge element 21 has on its side facing away from a jacket region 24a of the first gear part 7 at least one convex wedge section 210, 211, wherein the outer radius of curvature of the convex wedge section 210, 211 corresponds to the circular recess radius RI. A first convex wedge portion 210 and a second convex wedge portion 211 are separated from each other by a separating edge 212, wherein the two convex wedge portions 210, 211 are inclined to each other - so they have the same radius, which corresponds to the circular recess radius RI, but do not go steplessly into each other but are inclined and separated by the separating edge 212.
    As a result, in the respective blocking positions A1, A2, the wedge element 21 can be clamped in between the jacket region 24a and outer wall 101 and thus blocks the rotation of the first gear part 7. In the movement position, the wedge element 21 can move between the blocking positions Al, A2 and a rotation of the helical gear 6 and thus Längenverstellen the connecting rod 1 is possible.
    This now depends on the design of the switching device 30 in interaction with the wedge element 21. For this purpose, the wedge element 21 has two pressure sides 213, 214 facing away from each other, wherein each pressure side 213, 214 adjoins a working space 215, 216 spanned by the jacket region 24a of the first gear part 7 and the outer wall 101 of the wedge element recess 100. The working spaces 215, 216 are in each case flow-connected via at least one control opening 217, 218 to the switching device 30, wherein the switching device 30 releases or blocks a connection of the respective working space 215, 216 with a pressure medium source and / or sink.
    As shown particularly in FIG. 4, a first pressure side 213 of the wedge element 21 adjoins a first working space 215, which is flow-connected to the switching device 30 via a first control opening 217. A second pressure side 214 of the wedge element 21 adjoins a second working space 216, which is flow-connected to the switching device 30 via a second control opening 218. The switching device 30 is in a first position, the connection of the first working space 215 with a pressure medium source and the connection of the second working space 216 with a pressure medium sink and in a second position, the connection of the first working space 215 with a pressure medium sink and the connection of the second working space 216 with a Free pressure medium source.
    The pressure medium source and / or the pressure medium sink are, for example, the connecting rod bearing 3 of the large connecting-rod eye 3a. Conveniently, the pressure medium sink is the crankcase surrounding the connecting rod 1. The corresponding channels or holes are not shown for reasons of clarity.
    Thus, by applying or draining the working spaces 215, 216 with oil from the connecting rod bearing 3, the wedge element 21 between the blocking positions Al, A2 reciprocated or brought into the movement position B. As a result, the helical gear 6 can rotate in one or the other direction and an extension or shortening of the connecting rod 1 is possible.
    权利要求:
    Claims (16)
    [1]
    1. Length-adjustable connecting rod (1) for a reciprocating engine, in particular for an internal combustion engine, with at least a first rod part (2) and a second rod part (4), which two rod parts (2, 4) relative to each other in the direction of a longitudinal axis (la) of Connecting rod (1) slidably and a helical gear (6) are interconnected, wherein the helical gear (6) at least a first gear part (7) and with the first gear part (7) in engagement second gear part (8), wherein the first Gear part (7) as a spindle nut (9) or threaded spindle (10) and the second gear part (8) as a threaded spindle (10) or as a spindle nut (9) is formed and first (7) and second gear part (8) coaxial with respect a common parallel to the longitudinal axis (la) of the connecting rod (1) arranged screw axis (11) are formed, wherein the helical gear (6) is non-self-locking and the first gear part ( 7) can be brought into contact with at least one turnstile device (20) which can be switched by means of at least one switching device (30), which turnstop device (20) prevents the first gearbox part (7) from rotating in at least one blocking position (Al, A2) and in at least one movement position (B; A), characterized in that the Drehsperreinrichtung (20) by at least one wedge element (21) is formed, which on a coaxial with the screw axis (11) in the first rod part (2) extending cam track between the at least one blocking position (A) and the at least one movement position (B) about the helical gear (6) is movable.
    [2]
    2. length-adjustable connecting rod (1) according to claim 1, characterized in that the Drehsperreinrichtung (20) a first blocking position (Al), in which rotation of the first gear part (7) is prevented in a first rotational direction, a second blocking position (A2) in which rotation of the first gear part (7) is prevented in a second direction of rotation different from the first direction of rotation, wherein in the movement position (B), rotation in the first and in the second rotational direction is made possible.
    [3]
    3. Length-adjustable connecting rod (1) according to claim 1 or 2, characterized in that the curved path in a normal plane (ε) on the screw axis (11).
    [4]
    4. Length-adjustable connecting rod (1) according to one of claims 1 to 3, characterized in that the first gear part (7) in a by the first rod part (2) formed guide cylinder (5) is rotatably mounted and the wedge element (21) in one on the guide cylinder (5) in the radial direction subsequent, the first gear part (7) in the circumferential direction at least partially surrounding Keilelementausnehmung (100) is movably mounted.
    [5]
    5. Length-adjustable connecting rod (1) according to claim 4, characterized in that one of a jacket region (24a) of the first gear part (7) facing away from the outer wall (101) of the wedge element recess (100) extends substantially circular, wherein preferably the center of the circular outer wall (101) offset from the screw axis (11) of the helical gear (6) is arranged.
    [6]
    6. length-adjustable connecting rod (1) according to claim 5, characterized in that the Kreisausnehmungs radius (RI) of the outer wall (101) of the wedge element recess (100) is smaller than the radius (R) of the jacket region (24a) of the first gear part (7 ).
    [7]
    7. Length-adjustable connecting rod (1) according to one of claims 1 to 6, characterized in that a jacket region (24a) of the first gear part (7) is cylindrically convex and the wedge element (21) at least one preferably concave, the jacket region (24a) facing first wedge portion (22) which in at least one blocking position of the wedge element (21) contacts the jacket region (24a).
    [8]
    8. A length-adjustable connecting rod (1) according to claim 7, characterized in that the inner radius of curvature (R2) of the concave first wedge portion (22) is greater than the radius (R) of the corresponding convex jacket portion (24a).
    [9]
    9. length-adjustable connecting rod (1) according to one of claims 6 to 8, characterized in that the wedge element (21) on its jacket portion (24 a) of the first gear part (7) facing away from at least one convex wedge portion (210, 211), wherein the outer radius of curvature of the convex wedge portion (210, 211) corresponds to the Kreisausnehmungs radius (RI).
    [10]
    10. Length-adjustable connecting rod (1) according to one of claims 1 to 9, characterized in that the wedge element (21) on itseinmantel a jacket portion (24 a) of the first gear part (7) facing away from a first convex wedge portion (210) and a second convex Wedge portion (211), wherein the first convex wedge portion (210) and the second convex wedge portion (211) are separated by a separating edge (212).
    [11]
    The length-adjustable connecting rod (1) according to claim 10, characterized in that the first outer radius of curvature of the first convex wedge portion (210) and the second outer radius of curvature of the second convex wedge portion (211) correspond to the circle recess radius (RI), the first one Wedge portion and the second wedge portion inclined to each other.
    [12]
    12. Length-adjustable connecting rod (1) according to one of claims 5 to 11, characterized in that the wedge element (21) has two opposite pressure sides (213, 214), wherein each pressure side (213, 214) to one of a jacket portion (24a ) of the first gear part (7) and the outer wall (101) of the wedge element recess (100) spanned working space (215, 216) borders.
    [13]
    13. Length-adjustable connecting rod (1) according to claim 12, characterized in that at least one working space (215, 216) via at least one control opening (217, 218) is flow-connected to the switching device (30), wherein the switching device (30) connects the Working space (215, 216) with a pressure medium source and / or sink releases or locks.
    [14]
    14. Length-adjustable connecting rod (1), according to claim 12 or 13, characterized in that a first pressure side (213) of the wedge element (21) to a first working space (215) borders, via at least a first control opening (217) with the switching device (30) is flow-connected and a second pressure side (214) of the wedge element (21) adjoins a second working space (216) which is flow-connected via at least one second control opening (218) to the switching device (30), wherein the switching device (30) in a first position the connection of the first working space (215) with a pressure medium source and the connection of the second working space (216) with a pressure medium sink releases and in a second position the connection of the first working space (215) with a pressure medium sink and the connection of the second working space (216) with a source of pressure medium.
    [15]
    15. Length-adjustable connecting rod (1) according to claim 13 or 14, characterized in that it is at the pressure medium source and / or the pressure medium sink to the connecting rod bearing of the large connecting rod.
    [16]
    16. A reciprocating piston engine, in particular an internal combustion engine, with at least one length-adjustable connecting rod (1) according to one of claims 1 to 15.
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    同族专利:
    公开号 | 公开日
    AT518265B1|2017-09-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1784192A|1929-08-09|1930-12-09|Arthur D Macfarlane|Engine construction|
    GB441666A|1934-05-25|1936-01-23|Louis De Monge|Improvements in or relating to means for varying the cylinder clearance in internal combustion engines|
    US5406911A|1993-08-12|1995-04-18|Hefley; Carl D.|Cam-on-crankshaft operated variable displacement engine|
    WO2006115898A1|2005-04-28|2006-11-02|Laitram, L.L.C.|Variable-compression engine|
    EP2944789A1|2014-05-15|2015-11-18|Luis Alberto Velazquez|System for a mechanical conversion of an internal combustion engine|DE102018124781A1|2018-10-08|2020-04-09|Avl List Gmbh|Assembly method for joining the telescopic rod part of a VCR connecting rod|
    法律状态:
    2022-01-15| MM01| Lapse because of not paying annual fees|Effective date: 20210531 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50498/2016A|AT518265B1|2016-05-31|2016-05-31|Connecting rod with hydraulic clamping wedge|ATA50498/2016A| AT518265B1|2016-05-31|2016-05-31|Connecting rod with hydraulic clamping wedge|
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