• 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 rotary piston machine (1) with at least one rotary piston (3) revolving in a housing around a centrically or eccentrically mounted shaft (4), which has substantially the same cross section in the axial direction everywhere and which on its peripheral wall at least two vertex edges, wherein at least between two adjacent on the piston peripheral wall vertex edges a piston flank wall extends, with at least one disposed in an inner housing peripheral wall spark plug (9, 10), wherein between the piston skirt wall, an inner housing peripheral wall and inner housing side walls a combustion chamber (13, 14, 15, 16) and the spark plug (9, 10) is connected to the combustion chamber (13, 14, 15, 16) through at least one spark plug passage (20), at least one spark plug passage (20) having a substantially circular, elliptical or slot-shaped cross-section has u and wherein the spark plug (9, 10) is disposed in a spark plug cavity (21) having a larger diameter than at least one spark plug channel (20). To improve the function and the efficiency, it is provided that the volume of the spark plug cavity (21) relative to at least one spark plug channel (20) is arranged rearwardly, as seen in the direction of rotation.
    公开号:AT512152A4
    申请号:T503342012
    申请日:2011-12-19
    公开日:2013-06-15
    发明作者:Alexander Dipl Ing Machold；Andreas Dipl Ing Ennemoser；Josef Dipl Ing Fh Ruetz
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    Pnrrted: 24 ^ 08-20 * 2 1 56470
    The invention relates to a rotary piston machine with at least one in a housing about a centrically or eccentrically mounted axis rotating, one-piece or multi-piece rotary piston, which has substantially the same cross-section in the axial direction everywhere and which has on its peripheral wall at least two vertex edges, at least between two vertex edges adjacent to the piston perimeter wall extend a piston flank wall having at least one spark plug disposed in an inner shell peripheral wall and an intake port disposed in an inner shell peripheral wall, wherein a combustion chamber is formed between the piston skirt wall, an inner shell peripheral wall, and inner shell sidewalls, and the spark plug is passed through at least one spark plug channel connected to the combustion chamber.
    In this case, a housing is generally understood to be fixed to the vehicle or vibration-damping, for example resilient, suspended within the vehicle, which forms a cavity for accommodating the rotary piston. A rotary piston is understood to mean a centrically or eccentrically revolving element which can mechanically interact on its surface with a gas present in its surroundings, for example by the peripheral element exerting pressure on the gas by its movement and thereby compressing it, or vice versa the gas exerts a pressure on the rotating element and thereby moves it.
    A rotary piston machine of the type considered is preferably used as the sole drive in a motor vehicle, but may for example also be provided in addition to an electric motor in a hybrid drive. In the latter case, the output shaft of the rotary piston machine can either be connected directly to the mechanical drive train, or the output shaft is connected to an electrical generator which generates electrical energy for operating the electric motor and / or for charging a battery.
    As part of a hybrid drive, the rotary piston machine can also be designed relatively small compared to the electric motor and, in conjunction with a generator, merely serve as an additional power source to allow continued operation of the motor vehicle in the case of an empty battery and thus the range and thus the reliability and availability of
    Printed: 24 * 08-2012 E014 102012/50334 2
    Motor vehicle increase. In this case we also speak of a use as a "Range Extender".
    The rotary piston has in this case in the axial direction everywhere substantially the same cross-section and has on its peripheral wall at least two vertex edges, at least between two on the piston peripheral wall adjacent vertex edges a piston flank wall extends. Preferably, the rotary piston has three vertex surfaces and is referred to in this case as a triangular piston. Furthermore, the rotary piston has two parallel to its plane of rotation side surfaces.
    Furthermore, the piston flank wall of the rotary piston has a so-called piston recess, d. H. a trough-like depression in the surface of Kol benflanken wall.
    A rotary piston engine of the type considered is operated as an internal combustion engine with a fuel-air mixture, which is either sucked into the combustion chamber and compressed there, or the fuel is injected directly into the combustion chamber. The combustion chamber is formed between the piston circumferential wall and the inner wall of the housing, wherein the inner wall is typically in the form of a Trochoide.
    Due to the apex edges of the rotary piston, the combustion chamber is divided during the eccentric rotation of the rotary piston into a plurality of combustion chambers which displace with the rotation and whose size changes. For this purpose, edges along the apex sealing strips for sealing the combustion chambers formed on both sides of the apex edge may be arranged against each other.
    In one of the combustion chambers - in the case of a fuel-compressing machine - the fuel-air mixture is sucked, this is compressed there and ignited by means of at least one spark plug, and the resulting combustion gases are discharged again from the combustion chamber. In this case, a spark plug is understood to mean a device which can emit a spark at a predetermined time, which is suitable for igniting a combustible gas, in particular a fuel-air mixture. 3 3 10 2012/50334
    Printed: 24-08-2012
    Preferably, the rotary piston machine has two spark plugs, since this results in a particularly favorable operating point. In order to adapt the operating characteristics of the rotary piston machine, depending on the operating point, one or the other spark plug is ignited first.
    The spark plugs are arranged in the considered rotary piston engine in an inner housing peripheral wall, preferably centrally with respect to the axial extent of the rotary piston and the combustion chamber. An arrangement of the spark plugs in the viewed in the axial direction front or rear inner side wall housing is conceivable, but not so easy to implement, since these walls usually parts of the water cooling of Rotationskolbenmaschlne are arranged and therefore for the spark plugs and their connections no sufficient space for Available.
    Each spark plug is arranged in a spark plug cavity in or adjacent to the inner housing peripheral wall and connected by at least one spark plug with the combustion chamber, wherein a spark plug is a, preferably elongated, cavity understood, which for the passage of the - ignited or ignited - fuel-air mixture is suitable for or from a spark plug.
    Also disposed in an inner housing peripheral wall is an inlet channel for the fuel-air mixture, wherein an inlet channel is a, preferably elongated, cavity understood, which is suitable for introducing the ignited fuel-air mixture into the combustion chamber. The inlet channel may differ significantly in shape and diameter from the spark plug channels. The inlet channel is preferably arranged on the side opposite the spark plug side of the inner housing peripheral wall.
    Correspondingly, an outlet channel for the exhaust gases formed in the combustion chamber is arranged on the inner housing peripheral wall, preferably likewise on the side of the inner housing peripheral wall opposite the spark plugs.
    The mutual position and the shape of said elements of the rotary piston machine contribute significantly to the end of the combustion process
    Printed: 24-08-2012 E014 10 2012/50334 4 within the combustion chamber and thus the efficiency of the rotary piston machine.
    Individual positional relationships between elements of the rotary piston machine also result from requirements for the functionality and safety of the combustion process. Thus, for example, it must be ensured that in any rotational division of the rotary piston both the opening of the inlet channel in the inner housing peripheral wall wholly or partially and the opening of at least one of the spark plug channels in the inner housing peripheral wall are connected in whole or in part simultaneously with the same combustion chamber.
    Otherwise, for example, in the case of a misfire, the pressure of the ignited fuel-air mixture in this combustion chamber could propagate back into the inlet channel, which could cause a pressure wave and a blast there, which disturb the smoothness of the rotary piston machine significantly or even to their damage could lead.
    From DE 2 344 690 Al a rotary piston engine with at least one rotary piston is known. It is proposed to form the opening for receiving the spark plug as a slot whose longitudinal extent is parallel to the longitudinal direction of the edge seal. The spark plug cavity is formed symmetrically with respect to its volume in the direction of rotation of the rotary piston.
    From JP 56-059 934 U a rotary piston machine with two ignition devices is known whose shot channels have different diameters. The volume of these shot channels is - in particular in the direction of rotation of the rotary piston - each distributed symmetrically.
    The JP 61-178 035 U is concerned with the configuration of the opening of a firing channel in the raceway of a rotary piston engine in Wankelbauweise.
    The opening has the shape of a standing eight in the direction of rotation of the rotary piston. The ignition device is arranged centrally in the cavity, which also forms the firing channel.
    From the document US 4,755,116 A further a rotary piston engine with two ignition devices is known, wherein the opening of the second firing channel is larger than the opening of the first firing channel. The spark plug cavity below the ignition device is symmetrical.
    A symmetrical design of the spark plug cavity is also found in the known from JP 52 049 204 U rotary piston engine.
    It is the object of the present invention to improve the mutual position and the shape of the elements of the rotary piston machine, in particular the spark plug channels, in terms of function, in particular in terms of efficiency, of the rotary piston machine.
    This object is solved by the independent claim 1. Advantageous developments of the invention are contained in the subclaims.
    In a rotary piston machine according to the invention, it is provided that, in any rotational position of the rotary piston, both the opening of the inlet channel in the inner housing peripheral wall wholly or partially and the opening of at least one of the spark plug channels in the inner housing peripheral wall wholly or partly simultaneously with the same combustion chamber Under this condition, in accordance with the present invention, the distance between the opening of the inlet duct and the opening of the spark plug channel closest to the opening of the inlet duct measured along the inner peripheral wall of the housing is minimal or approximately minimal.
    In an inner housing peripheral wall in Trochoidenform, in which the considered spark plug is arranged on the same side of the shorter axis of symmetry of the trochoid as the inlet channel, the inventive arrangement means that the distance of the considered spark plug channel opening from this axis of symmetry is maximum or approximately maximum.
    In the functional sequence of the rotary piston machine, the arrangement according to the invention means that a vertex edge of the rotary piston passes over the considered spark plug channel opening at the moment or immediately after the moment when the vertex edge trailing this vertex edge in the direction of rotation completely passes over the inlet channel, the two vertex edges considered at both ends determine the combustion chamber. ΗΟΜΒΗκΙβΕ
    Printed: 24-08-2012 E014 10 2012/50334 6
    The inventive arrangement, the ignition of the fuel-air mixture can take place as early as possible, whereby the efficiency of the rotary piston engine is increased.
    Furthermore, it can be provided in a rotary piston machine according to the invention that at least one spark plug channel has a substantially circular, elliptical or slot-shaped cross section. It has been found that also by such variations of the cross section of the spark plug channel favorable effects for the combustion of the fuel-air mixture can be achieved.
    In a preferred embodiment of the invention, the spark plug is disposed in a spark plug cavity which has a larger diameter than at least one spark plug channel.
    In a particularly preferred variant of this embodiment, the volume of the spark plug cavity is arranged rearwardly relative to at least one spark plug channel, viewed predominantly in the direction of rotation. As a result, the flow movement in the combustion chamber supports the flame core in the spark plug channel in its direction of movement into the combustion chamber, which assists in a trouble-free burning of the flame from the spark plug channel into the combustion chamber.
    Another positive effect of this variant is a homogeneous supply of the fuel-air mixture to the spark plug in the spark plug cavity.
    In a further preferred variant of this embodiment, the spark plug cavity has a tapered, in particular tapered, tapered side surface, wherein one end of at least one spark plug channel lies wholly or partially within this side surface.
    In a further preferred variant of this embodiment, the spark plug cavity extends substantially parallel to at least one spark plug channel.
    These last-mentioned variants also lead, as has been shown, to a favorable and efficient course of ignition and combustion of the fuel-air mixture.
    Printed: 24-08-2012 E014 10 2012/50334 7
    In a further preferred embodiment of the invention it is provided that along at least one vertex edge of the piston peripheral wall at least one sealing strip for sealing the combustion chambers formed on both sides of the vertex edge is arranged against each other and that the sealing strip the outlet opening of the spark plug channel or the outlet openings of all belonging to a spark plug spark plug channels in the combustion chamber when sweeping the exit opening (s) completely or almost completely covers.
    In this way, a complete separation of the two considered combustion chambers is achieved by the sealing strip in each rotational position of the rotary piston by preventing the two combustion chambers are indirectly connected to each other via one or more spark plug channels and / or via the spark plug cavity during the sweeping these spark plug channels through the sealing strip , As a result, supported by the pressure difference in the two combustion chambers, already burning fuel-air mixture could inadvertently get from one combustion chamber to the other and there mix with the still unburned fuel-air mixture and ignite this also, causing the combustion process disturbed and Thus, the efficiency of the rotary piston machine would be reduced again.
    Further advantages of the invention will be explained below with reference to partially schematic representations of a rotary piston machine according to the invention together with the associated description. Showing:
    1 shows a section through a rotary piston machine according to the invention;
    2 shows an abstracted sectional illustration of the elements which are essential for the kinematics of the rotary piston machine, as points and lines;
    3 shows an illustration of a spark plug channel according to the invention and of a spark plug cavity according to the invention.
    4 shows a schematic illustration of the flow behavior in a spark plug channel and in a spark plug cavity, on the one hand in an arrangement according to the prior art and on the other hand in an arrangement according to the invention.
    Printed: 24-08-2012 10 2012/50334 E014 δ
    In the sectional view in Fig, l a mixture-compacting rotary piston machine 1, in which the invention can be used, as essential components, the housing 2 having a plurality of cooling channels, an inlet opening 7 for the fuel-air mixture and an outlet opening 8 for the Combustion gases and the rotary piston 3, which edges three vertices and corresponding to three piston flank walls 11, each having a piston recess 12 shown. At the apex edges of the rotary piston radially outward sealing strips 17, 18, 19 are mounted. The rotary piston 3 eccentrically rotates about a fixed axis 4 with an external toothing 5, wherein it rolls on the external toothing 5 with an internal toothing 6. The rotary piston 3 rotates in a clockwise direction,
    Approximately diametrically opposite the inlet opening 7 and the outlet opening 8, two spark plugs are arranged in the housing wall at the positions designated 9 and 10. Due to the rotational position of the rotary piston 3 in the interior of the housing 2 (again in a clockwise direction) four combustion chambers 13, 14, 15 and 16 are defined, which in this order the intake, compression, ignition or. Output stroke are assigned.
    Fig. 2 shows various elements of the rotary piston machine in an abstracted sectional view as points or lines, which determine the kinematics of the rotary piston engine, namely the inner housing peripheral wall in the form of a Trochoide 2a, the outer peripheral wall 3a of the rotary piston and the outer edge 5a of the fixed gear on which rolls the inner edge 6a of the rotary piston. Also visible are the forward and aft edge points 7a and 7a 'of the inlet opening on the trochoid seen in the direction of rotation, the corresponding edge points 8a and 8a' of the outlet opening on the trochoid, and the positions 9a and 10a of the spark plug channel of the rear and front spark plugs. Finally, the short (in Fig. 2 horizontally extending) and the long (in Fig. 2 perpendicular) axis of the trochoid are denoted by Al and A2.
    The rotary piston is in Fig. 2 in the following position: The inlet channel is just closed, d. H. the compression combustion chamber 14 has no connection to the inlet channel (sealing strip 17 covers the front edge point 7a of the inlet opening). At the same time, the compression combustion chamber 9 9 10 2012/50334
    Printed: 24-08-2012 14 but still no connection to the rear spark plug channel 9a (sealing strip 18 is about to cover spark plug channel 9a). The rear spark plug channel 9a is arranged in the inventive embodiment of the rotary piston machine according to FIG. 2 such that its distance from the short axis Al derTrochoide 12 mm is approximately maximum. In a conventional arrangement, this distance was only 8.3 mm. In this way, the ignition of the rear spark plug can be done as early as possible.
    Figure 3 shows the shape of the space in the inner housing peripheral wall of the rotary piston 3, in which the rear spark plug 9 is housed in this embodiment. The spark plug 9 is arranged in a spark plug cavity 21 with a substantially elliptical cross section, which has a conical side surface 22. The conical side surface 22 is pierced by one end of the spark plug channel 20, the spark plug channel 20 also having an elliptical cross section and extending parallel to the longitudinal direction of the spark plug cavity 21. The spark plug channel 20 is arranged eccentrically with respect to the spark plug cavity 21, more specifically, the outer edge of the spark plug cavity 21 and the Zündkerzenkanai 20 lie on a straight line.
    As can be seen in Fig. 3, the volume of the spark plug cavity 21 is arranged relative to the spark plug channel 20 seen mainly in the direction of rotation rear. As a result, the flow conditions within these two rooms undergo a decisive improvement. This will be explained in more detail below with reference to FIG. 4.
    FIG. 4 a shows a prior art arrangement in which the spark plug cavity 21 is arranged predominantly in the direction of rotation relative to the spark plug channel 20. The position of the ignition point of the spark plug 9 is also shown in FIG. 4a. The direction of movement of the rotor, which at the same time corresponds to the flow direction of the fuel-air mixture in the combustion chamber, is also characterized by a straight arrow.
    The flow movement pushes in this known from the prior art embodiment, the flame core against its desired propagation direction back into the spark plug channel 20 into it. There are two independent circulating flows in the spark plug hollow space 21 and in the
    Printed: 24-08-2012 E014 10 2012/50334 10 Spark plug channel 20, indicated in the figure by two rings of rotating arrows. As a result, a trouble-free burning of the flame from the spark plug channel 20 is hindered in the combustion chamber.
    In the arrangement according to the invention shown in FIG. 4b, in which the spark plug cavity 21 is located at the front relative to the spark plug channel 20, viewed in the direction of rotation, the flame core is supported by the flow movement in the direction of the combustion chamber.
    As a result, a trouble-free burning of the flame from the spark plug channel is supported in the combustion chamber. Since only a single circulating flow in the spark plug cavity 21 and in the spark plug channel 20 results, in turn indicated in the figure by a ring of rotating arrows, a homogeneous mixture feed to the spark plug 9 results as a further advantage.
    The larger diameter of the elliptical spark plug channel 20 in this embodiment is about 4 mm and is less than half the size of the larger diameter of the elliptical spark plug cavity 21. This difference in diameter has the effect that the flow from the relatively narrow spark plug channel 20 is the swirl of the Spark plug cavity 21 rotating fuel-air mixture drives. Depending on the selected operating point of the rotary piston machine 1, the spark plug channel 20 can be selected with a certain, preferably circular, more preferably elliptical or slot-shaped, cross-section.
    Furthermore, it is possible to connect the spark plug cavity 21 with the spark plug 9 through two spark plug channels with the combustion chamber. It should be noted, however, that in one position of the rotary piston 3, in which the openings of the two spark plug channels in the combustion chamber belong to different combustion chambers, a kind of "short circuit". would arise between the two combustion chambers. At the same time, a large pressure difference can prevail between the two combustion chambers. This can lead to an undesirable " burn back " from one combustion chamber to the other.
    This " short-circuit effect " can be avoided - in the case of both a spark plug channel and two spark plug channels - in that each sealing strip 17, 18, 19 is wide enough to completely or completely pass the exit opening (s) of the one or both of the spark plug channels
    Printed: 24-08-2012 E014 10 2012/50334 11 almost completely, so that no parts of these outlets belonging to different combustion chambers are simultaneously " opened ". 10 2012/50334
    Printed: 24-08-2012 E014 12 1 REFERENCE SIGNS Rotary piston machine 2 Housing 3 Rotationskoiben 4 fixed axis 5 External teeth 6 Internal teeth 7 Inlet 8 Outlet 9 Rear spark plug 10 Front spark plug 11 Piston skirt wall 12 Piston cavity 13 Intake combustion chamber 14 Compression combustion chamber 15 Ignition combustion chamber 16 Outlet combustion chamber 17,18,19 Sealing strips 2a Trochoide 3a Outer peripheral wall of the rotary piston 5a Outer edge of the stationary gear 6a Inner edge of the rotary piston 7a Front edge point of the inlet opening on the trochoid 7a 'Rear edge point of the inlet opening on the trochoid 8a Front edge point of the outlet opening on the trochoid 8a 'Rear edge point of the outlet opening on the trochoid 9a Position of the rear spark plug channel 10 2012/50334
    Printed: 24-08-2012 E014 13 10a Position of the front spark plug channel 17a, 18a, 19a Positions of the sealing strips Al Short axis of the trochoid A2 Long axis of the trochoid 20 Spark plug channel 21 Spark plug cavity 22 Cone-shaped side surface of the spark plug cavity
    权利要求:
    Claims (4)
    [1]
    Printed: 24-08-2012 E015 10 2012/50334 14 Claims 1. Rotary piston machine (1) with at least one, one-part or multi-part rotary piston (3) revolving in a housing about a centrically or eccentrically mounted axis (4), which in the axial direction has substantially the same cross section and which has on its peripheral wall at least two vertex edges, at least between two on the piston peripheral wall adjacent vertex edges a piston flank wall extends, with at least one arranged in an inner housing peripheral wall spark plug (9, 10), wherein between the Piston flank wall, an inner housing peripheral wall and inner housing side walls of a combustion chamber (13, 14, 15, 16) is formed and the spark plug (9, 10) by at least one spark plug channel (20) with the combustion chamber (13, 14, 15, 16) is connected wherein at least one spark plug channel (20) has a substantially circular, elliptical o the slot-shaped cross-section, and wherein the spark plug (9, 10) is disposed in a spark plug cavity (21) having a larger diameter than at least one spark plug channel (20), characterized in that the volume of the spark plug cavity (21) relative to at least one spark plug channel (20) is arranged behind seen mainly in the direction of rotation.
    [2]
    2. Rotary piston engine (1) according to claim 1, characterized in that the spark plug cavity (21) has a tapered, in particular conically pointed, side surface (22) and that one end of at least one spark plug channel (20) wholly or partially within this side surface (22). 22) is located.
    [3]
    3. Rotary piston engine (1) according to claim 1 to 2, characterized in that the spark plug cavity (21) extends substantially parallel to at least one spark plug channel (20).
    [4]
    4. Rotary piston machine (1) according to one of claims 1 to 3, characterized in that along at least one vertex edge of the rotary piston (3) at least one sealing strip (17, 18, 19) for sealing the combustion chambers formed on the two sides of the vertex edge (13 .

    Printed: 24-08-2012 E015 10 2012/50334 15 14, 15, 16) is arranged against each other and that the sealing strip (17, 18, 19), the outlet opening of the spark plug channel (20) or the outlet openings of all to a spark plug (9, 10) belonging to the spark plug channels (20) in the combustion chamber when sweeping the outlet opening (s) completely or almost completely covers. 2012 08 23; Fu / St
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    WO2013091797A1|2013-06-27|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    AT503342012A|AT512152B1|2011-12-19|2011-12-19|Rotary piston engine|AT503342012A| AT512152B1|2011-12-19|2011-12-19|Rotary piston engine|
    PCT/EP2012/005127| WO2013091797A1|2011-12-19|2012-12-12|Rotary piston engine|
    DE201211005349| DE112012005349A5|2011-12-19|2012-12-12|Rotary piston engine|
    JP2014546355A| JP2015504999A|2011-12-19|2012-12-12|Rotary piston engine|
    US14/222,323| US20140202419A1|2011-12-19|2014-03-21|Rotary piston engine|
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