WO2008098932A1 - Système d'entraînement par came - Google Patents

Système d'entraînement par came Download PDF

Info

Publication number
WO2008098932A1
WO2008098932A1 PCT/EP2008/051679 EP2008051679W WO2008098932A1 WO 2008098932 A1 WO2008098932 A1 WO 2008098932A1 EP 2008051679 W EP2008051679 W EP 2008051679W WO 2008098932 A1 WO2008098932 A1 WO 2008098932A1
Authority
WO
WIPO (PCT)
Prior art keywords
cam
spring
shaft portion
shaft
cam drive
Prior art date
Application number
PCT/EP2008/051679
Other languages
German (de)
English (en)
Inventor
Oliver Fritz
Original Assignee
Mahle International Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle International Gmbh filed Critical Mahle International Gmbh
Priority to EP08708912.4A priority Critical patent/EP2118452B1/fr
Publication of WO2008098932A1 publication Critical patent/WO2008098932A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • F01L1/267—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L13/0047—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0471—Assembled camshafts
    • F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L2001/34486—Location and number of the means for changing the angular relationship
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00—Using particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • the invention relates to a cam drive for an internal combustion engine, in particular for a motor vehicle engine, with at least one camshaft, on which at least one cam is arranged.
  • camshafts are used to open the intake and exhaust valves of the cylinders.
  • the camshaft mounted on the cam to convert the rotational movement of the camshaft in a longitudinal movement, which usually corresponds to a valve lift.
  • a cam follower which may be formed for example in the manner of a rocker arm or a rocker arm and direct or indirect transmission of a working curve formed by an outer contour of the associated cam on an associated valve the internal combustion engine is used.
  • a spring device is provided which presses the cam follower on the associated cam and thereby ensures a permanent contact between the cam and the cam follower.
  • Such a spring device may be formed on the valve in contact with the cam follower.
  • the invention is concerned with the problem of improving a cam drive in that its assembly is much simpler.
  • the invention is based on the general idea to design a cam drive such that an assembly of the same can be done with a relaxed spring device and this can be stretched easily, for example by means of a torque wrench, after mounting the cam follower and the camshaft.
  • at least one spring device is provided, which has a spring device arranged on at least one fixable shaft section. element.
  • the spring device is designed so that it is at one end in contact with the associated cam follower and the other end rotatably connected to the at least one shaft portion, so that by rotating the at least one shaft portion, a tensioning of the spring element of the spring means against the cam follower can be effected.
  • the at least one shaft section can be fixed, whereby the previously applied spring tension is maintained. It is of particular advantage that the entire assembly of the cam drive according to the invention can be done without biased spring means and this can be tightened until the end, for example by means of a torque wrench. This simplifies and simplifies the assembly considerably and at the same time a subsequent change or adjustment of the spring tension by a corresponding rotation of the at least one shaft portion easily possible, whereby the cam gear according to the invention compared to conventional cam drives is easy to adjust even if necessary maintenance.
  • the at least one camshaft is an adjustable camshaft with a coaxially arranged in an outer shaft inner shaft, which is rotatably mounted against the outer shaft.
  • the cam gear according to the invention is not is limited to a specific design of camshafts, but can be used in both unchanged and non-adjustable camshafts in an unchanged manner, whereby a broad economic applicability is given.
  • a plurality of spring means may be arranged along a common shaft portion, wherein each of the spring means is associated with an associated cam follower.
  • This embodiment also shows the wide range of use of the spring devices according to the invention, which may be provided both individually and in a plurality along a common shaft portion.
  • spring devices which are positioned on separate shaft sections have the advantage that they are individually adjustable in terms of their torque and the resulting spring tension, while the arrangement of several spring devices on a common shaft section offers the great advantage that at the end of the assembly of the invention Nockentriebes several spring devices can be stretched simultaneously by a corresponding application of torque on the common shaft section.
  • the spring element is designed as a leg spring wound around the at least one shaft section.
  • leg springs are on the one hand inexpensive to produce and on the other hand offer the advantage that a almost any spring tension by an appropriate selection of the material, such as a spring steel, and / or by the cross section of the spring element can be realized.
  • each spring device comprises in addition to the spring element two rotatably connected to the at least one shaft portion spring holder, which are formed as equal parts.
  • the spring holder can be connected by means of a fixing member rotatably connected to the at least one shaft portion and usually have at least one passage opening into which a leg of the associated spring element is inserted and thus fixed in this. Due to the design of the spring holder as a common part, on the one hand simplifies the assembly of the spring device according to the invention, since the spring holder is suitable for both mounting positions on the spring device. At the same time reduce the storage and logistics costs and a failure rate when assembling the cam gear according to the invention.
  • FIG. 2 is a sectional view in the region of a cam follower with a spring device according to the invention
  • FIG. 3 is a view as in FIG. 1, but from a different perspective and limited to a spring device
  • FIG. 5 is a view as in Fig. 4, but with only a single spring device
  • FIG. 6a, b show different views of a single spring device according to the invention with two shaft sections, Fig. 7a, b, an inventive spring element in a dissolved or tensioned state.
  • a cam drive 1 has a camshaft 2 with cams 3 and 4 arranged thereon.
  • 1 is a so-called adjustable camshaft having an inner shaft 6 arranged coaxially in an outer shaft 5 (see FIG. 2) (see FIG. 2), the inner shaft 6 being rotatable against the outer shaft 5 is stored.
  • Longitudinal end of the camshaft 2 is shown in FIG. 1 at one end a so-called sprocket 7 and the other end a phase adjusting device 8 is arranged, with which a relative rotation between the outer shaft 5 and the inner shaft 6 is adjustable.
  • the phase adjusting device 8 serves in a known manner for adjusting a valve opening time or a valve lift.
  • a cam follower 9 is provided in the region of the camshaft 2, which transmits a working curve formed by an outer contour of the cam 3, 4 to one or more associated valve (s) 10 of the internal combustion engine.
  • the cam follower (9) is designed according to FIG. 2 as a rocker arm, wherein it is also conceivable that in another arrangement or guide shape of the cam drive 1 of the cam follower 9 is designed as a drag lever.
  • the cam follower 9 is preferably in contact with the cam or the cam 3, 4 of the camshaft 2 via rolling elements 11. Also conceivable here are sliding contacts.
  • each cam ⁇ follower 9 a spring 12 is associated which presses the No ⁇ ckensammlunger 9 to the associated cams 3, 4 of the camshaft 2 and biases against these (cf. FIGS. 1 to 7).
  • the spring device 12 is arranged on at least one fixable, that is fixable in its rotational position shaft portion 13 and has a arranged on this shaft portion 13 spring element 14. A force with which the spring element 14 presses the cam follower 9 against the associated cams 3, 4, can be adjusted via a rotational position of the shaft portion 13.
  • the spring device 12 is designed such that a rotation of the at least one fixable Wel ⁇ lenabiteses 13 causes a tensioning of the spring element 14 against the cam follower 9.
  • a spring 15 is arranged in the region of the at least one valve 10, which biases the valve 10 in its closed position.
  • the cam follower 9 actuates one or more valves 10.
  • the spring element 14 has been designed as a at least one shaft section 13 wound leg spring is formed, the first leg 16 are coupled to spring holders 17, while the second leg 18 as shown in FIG. 2 and 3 rests on the cam follower 9.
  • the two spring holders 17 of each spring device 12 are designed as identical parts, so that they can be mounted either on the right and left of the spring element 14 on the at least one shaft portion 13.
  • Each of the spring holder 17 in this case has corresponding passage openings 19, through which the respective first leg 16 of the spring element 14 inserted therethrough and thereby can be fixed to the associated spring holder 17.
  • the spring holder 17 can be rotatably connected to the at least one shaft portion 13, so that a rotation of the shaft portion 13 causes at clamping the cam follower 9 leg 18 causes a tensioning of the spring element 14.
  • a torque wrench can be attached to at least one longitudinal end of the at least one shaft section 13, for which purpose an engaging engagement profile 21, in particular a free flute, an external hexagon (see Fig. 4) or a corresponding outer longitudinal end of the shaft section 13 Allen is attached.
  • an engaging engagement profile 21, in particular a free flute, an external hexagon (see Fig. 4) or a corresponding outer longitudinal end of the shaft section 13 Allen is attached.
  • a free-grinding is arranged at the longitudinal end of the shaft section 13.
  • the shaft section 13 according to FIGS. 6a and 6b consists of two shaft sections 13 'and 13'', while the shaft section 13 according to FIGS. 4 and 5 is formed as a continuous shaft section 13.
  • a corresponding engagement profile 21 is provided at both longitudinal ends of the respective shaft section 13 'and 13 ", so that preferably at both, but at least at one longitudinal end, a torque for tensioning the spring device 12 on the respective Shaft section 13 'and 13''can be applied.
  • the engagement profile 21 can also be arranged at a distance from the longitudinal end of the shaft section 13 (compare FIGS. 4 and 5).
  • the at least one shaft portion 13 has a substantially transverse to the shaft portion axis 22 extending through hole 19 ', which is aligned with mounted spring means 12 with an associated and not shown opening in a cylinder head or in a cylinder head cover and for receiving a also not shown fixing, in particular a fixing bolt is formed.
  • a fixing bolt is formed.
  • the applied torque can thus be fixed by inserting the fixing element into the passage opening 19 'and a corresponding opening in the cylinder head or in the cylinder head cover.
  • at least one additional fixing device 23 in particular a clamping screw, can be provided, by means of which the at least one shaft section 13 can be fixed with the spring device 12 tensioned (compare FIG. 5).
  • the spring element 14 is shown in a relaxed position (FIG. 7a) and in a tensioned position (FIG. 7b), such a design as a leg spring being inexpensive and easy to implement with respect to a desired spring characteristic.
  • the at least one spring device 12 can be arranged via the at least one shaft section 13, for example, on a cylinder head (not shown) or on a cylinder head cover (also not shown).
  • An arrangement can be made directly or indirectly via a frame, in particular an aluminum frame.
  • the inventive spring means 12 and by the inventive cam drive 1 of the cam assembly of the drive 1 or the zuge culinaryi ⁇ gen internal combustion engine, because the spring means 12 can be tensioned after assembly of the camshaft. 2 Due to the arrangement of the spring device 12 on the cylinder head cover or on the cylinder head and in particular by the combination of several spring devices 12 along a single shaft section 13 whose assembly is additionally simplified.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

La présente invention concerne un système d'entraînement par came (1) pour un moteur à combustion interne, en particulier pour un moteur d'automobile, comprenant au moins un arbre à cames (2) sur lequel se trouve au moins une came (3, 4). Le système d'entraînement par came (1) présente également un poussoir de came (9) permettant une transmission directe ou indirecte d'une courbe caractéristique engendrée par un contour extérieur de la ou des cames (3, 4) à une ou plusieurs soupapes associées du moteur à combustion interne. Le système d'entraînement par came (1) comprend également au moins un dispositif à ressort (12) permettant de comprimer le poussoir de came (9) sur une came associée (3, 4). Ce ou ces dispositifs à ressort (12) présentent un élément ressort (14) situé sur au moins une section d'arbre (13) pouvant être fixée. Le dispositif à ressort (12) est conçu de manière qu'une torsion de la ou des sections d'arbre (13) pouvant être fixées induise une tension de l'élément ressort (14) contre le poussoir de came (9).
PCT/EP2008/051679 2007-02-13 2008-02-12 Système d'entraînement par came WO2008098932A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08708912.4A EP2118452B1 (fr) 2007-02-13 2008-02-12 Système d'entraînement par came

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007007604A DE102007007604A1 (de) 2007-02-13 2007-02-13 Nockentrieb
DE102007007604.7 2007-02-13

Publications (1)

Publication Number Publication Date
WO2008098932A1 true WO2008098932A1 (fr) 2008-08-21

Family

ID=39389350

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/051679 WO2008098932A1 (fr) 2007-02-13 2008-02-12 Système d'entraînement par came

Country Status (3)

Country Link
EP (1) EP2118452B1 (fr)
DE (1) DE102007007604A1 (fr)
WO (1) WO2008098932A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016201118A1 (de) * 2016-01-27 2017-07-27 Schaeffler Technologies AG & Co. KG Drehungleichförmigkeitsausgleichsvorrichtung an einem Nockenwellentrieb mit nockenwellenparalleler Feder

Citations (8)

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Publication number Priority date Publication date Assignee Title
JPS5970842A (ja) * 1982-10-18 1984-04-21 Toyota Motor Corp 可変排気量型エンジンのバルブ停止機構
DE3523531A1 (de) * 1984-07-02 1986-02-13 Honda Giken Kogyo K.K., Tokio/Tokyo Ventilbetaetigungseinrichtung mit sperrfunktion fuer einen verbrennungsmotor
EP0733783A1 (fr) * 1995-03-20 1996-09-25 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Ensemble de culbuteur
WO2003106818A1 (fr) * 2002-06-13 2003-12-24 Delphi Technologies, Inc Mecanisme d'actionnement a soupape reglable comprenant une came oscillante
GB2424257A (en) * 2005-03-18 2006-09-20 Mechadyne Plc Single cam phaser camshaft with adjustable connections between the inner shaft and associated cam lobes
EP1710402A1 (fr) * 2003-12-18 2006-10-11 Toyota Jidosha Kabushiki Kaisha Mecanisme de distributeur variable
DE102005031241A1 (de) * 2005-07-01 2007-01-04 Fev Motorentechnik Gmbh Variabler Ventiltrieb einer Kolben-Brennkraftmaschine
WO2007138451A1 (fr) * 2006-05-29 2007-12-06 Toyota Jidosha Kabushiki Kaisha Dispositf d'entraînement de soupape destiné à un moteur à combustion interne

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AT249456B (de) * 1963-01-29 1966-09-26 Edouard M Torossian Vorrichtung für die Längsblockierung von zylindrischen Wellen
DE1908423U (de) * 1964-02-19 1965-01-14 Alfred Schilling Deckelfederung.
US4759321A (en) * 1985-06-24 1988-07-26 Nissan Motor Co., Ltd. Valve timing arrangement for internal combustion engine having multiple inlet valves per cylinder
FR2585766B1 (fr) * 1985-08-05 1987-11-27 Peugeot Dispositif de commande de soupapes d'un moteur a combustion interne par culbuteurs desactivables
DE4414421A1 (de) * 1994-04-26 1995-11-02 Schiel Hans Josef Einrichtung zum Spannen einer Torsionsfeder
DE10058539C2 (de) * 2000-11-24 2003-07-17 Konrad Harter Maschb Gmbh Montierwerkzeug für eine Drehfeder und Verfahren zum Montieren einer derartigen Drehfeder
US6745734B2 (en) * 2002-05-24 2004-06-08 Delphi Technologies, Inc. Variable valve actuating mechanism having torsional lash control spring
US6988473B2 (en) * 2003-06-26 2006-01-24 Delphi Technologies, Inc. Variable valve actuation mechanism having an integrated rocker arm, input cam follower and output cam body
JP4179158B2 (ja) * 2003-12-17 2008-11-12 トヨタ自動車株式会社 可変動弁機構
DE102004006186A1 (de) * 2004-02-06 2005-08-25 Volkswagen Ag Ventiltrieb-Vorrichtung zur variablen Hubverstellung eines Gaswechselventils

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5970842A (ja) * 1982-10-18 1984-04-21 Toyota Motor Corp 可変排気量型エンジンのバルブ停止機構
DE3523531A1 (de) * 1984-07-02 1986-02-13 Honda Giken Kogyo K.K., Tokio/Tokyo Ventilbetaetigungseinrichtung mit sperrfunktion fuer einen verbrennungsmotor
EP0733783A1 (fr) * 1995-03-20 1996-09-25 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Ensemble de culbuteur
WO2003106818A1 (fr) * 2002-06-13 2003-12-24 Delphi Technologies, Inc Mecanisme d'actionnement a soupape reglable comprenant une came oscillante
EP1710402A1 (fr) * 2003-12-18 2006-10-11 Toyota Jidosha Kabushiki Kaisha Mecanisme de distributeur variable
GB2424257A (en) * 2005-03-18 2006-09-20 Mechadyne Plc Single cam phaser camshaft with adjustable connections between the inner shaft and associated cam lobes
DE102005031241A1 (de) * 2005-07-01 2007-01-04 Fev Motorentechnik Gmbh Variabler Ventiltrieb einer Kolben-Brennkraftmaschine
WO2007138451A1 (fr) * 2006-05-29 2007-12-06 Toyota Jidosha Kabushiki Kaisha Dispositf d'entraînement de soupape destiné à un moteur à combustion interne

Also Published As

Publication number Publication date
EP2118452B1 (fr) 2013-04-10
EP2118452A1 (fr) 2009-11-18
DE102007007604A1 (de) 2008-08-14

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