EP2157292A1 - Ensemble de soupape d'échappement pour moteur à combustion interne - Google Patents

Ensemble de soupape d'échappement pour moteur à combustion interne Download PDF

Info

Publication number
EP2157292A1
EP2157292A1 EP08162684A EP08162684A EP2157292A1 EP 2157292 A1 EP2157292 A1 EP 2157292A1 EP 08162684 A EP08162684 A EP 08162684A EP 08162684 A EP08162684 A EP 08162684A EP 2157292 A1 EP2157292 A1 EP 2157292A1
Authority
EP
European Patent Office
Prior art keywords
valve
gear assembly
valve gear
assembly according
intermediate lever
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP08162684A
Other languages
German (de)
English (en)
Inventor
Manfred Kolkman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP08162684A priority Critical patent/EP2157292A1/fr
Publication of EP2157292A1 publication Critical patent/EP2157292A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating 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
    • 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
    • F01L13/0021—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 by modification of rocker arm ratio
    • 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
    • F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • 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
    • F01L1/08—Shape of cams
    • 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
    • F01L1/20—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
    • 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
    • F01L1/462—Valve return spring arrangements
    • 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
    • F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F01L2013/0068—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
    • 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
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/032—Electric motors

Definitions

  • the present invention generally relates to the field of internal combustion engines, and more specifically to a valve gear assembly for such engine with variable valve actuation capability.
  • VVA variable valve actuation
  • VVA voltasity valve lift
  • Cylinder deactivation can be used to increase fuel economy by deactivating certain cylinders of an engine in case of a low power demand that does not require firing of all cylinders.
  • the well-known BMW "Valvetronic” system for instance uses a camshaft driven VVA that comprises a pivotable intermediate lever comprising a roller acted upon by a cam.
  • the lever comprises a shoe with a profiled surface that acts on a roller of the rocker finger follower (RFF).
  • the valve stroke depends on the portion of the guide surface of the intermediate lever on which the RFF roller is forced to roll under the action of the cam lobe. This can be adjusted by moving the angular position of the pivoting lever, which is carried out by means of an eccentric shaft, common to all cylinders and controlled by a gear mechanism with electric motor.
  • US 5,373,818 describes another valve gear assembly by BMW with valves having a variable stroke.
  • the adjustment of the stroke of these valves is also made via an eccentric shaft, which displaces the supporting point of a transfer element disposed between each cam and each stroke valve, the two eccentrics assigned to one cylinder being however of different geometry.
  • the transfer element is formed by a valve lever, which is supported on the eccentric and is actuated by the cam, and in turn acts upon the valve stem or rocker lever, the respective contact surfaces being formed by rollers.
  • US 2003/0037739 relates to a further valve gear assembly with camshaft driven VVA, wherein the valves can be individually deactivated.
  • a given cam of the camshaft actuates its associated valve using a pulley assembly, which can be displaceably guided in a sliding block part along an adjusting inclined plane, together with a valve actuating element connected in series.
  • valve gear assembly do not permit individual and independent valve stroke adjustment (especially deactivation). Moreover, the above designs appear to be quite complex, using many parts.
  • the object of the present invention is to provide an alternative valve gear assembly with individual variable valve stroke adjustment. This is achieved by a valve gear assembly according to claim 1.
  • a valve gear assembly for an internal combustion engine in accordance with the present invention comprises at least one valve per engine cylinder and a camshaft with a cam for actuating a valve.
  • a transfer device is interposed between the cam and the corresponding valve for allowing varying the stroke of the valve. According to the present invention, the transfer device comprises:
  • the present transfer device makes it possible to individually and independently control the stroke (amplitude of valve lift) of a valve.
  • the particular design of the intermediate lever that has a sliding pivot i.e. the lever is hinged about a pivot, which is itself slideable
  • the pivot has a through bore therein by which it is slidingly mounted on a shaft.
  • the present valve gear assembly may comprise one or more inlet valves and one or more outlet valves.
  • the respective valve lifts may be actuated by one or more camshafts and a transfer device may be provided for each valve for which a variable lift capability is desired.
  • a transfer device may be associated with each inlet valve.
  • a cradle element extending parallel to the camshaft may be used, on which each of the transfer devices associated with the valves actuated by the camshaft are pre-assembled.
  • the intermediate lever's roller assembly may comprise three rollers that are aligned on a common shaft, the central roller being in contact with the cam and the outer rollers rolling on a respective track of the guide path defined by the crank element.
  • the guide path preferably defines a flat, idle guide portion continuing into a sloped portion. While such a cranked guide path is preferred, various shapes of the guide path may be used that comprise a zero-lift portion and an actuating portion, provided that rolling along said actuating portion will cause the intermediate lever to push the valve in actuating direction.
  • the pivot's pivoting axis is preferably parallel to the axis of the roller assembly.
  • the intermediate lever has a foot for transmitting the actuating force to the corresponding valve.
  • the foot has a flat actuating surface and the transfer device is configured so that the foot's actuating surface remains parallel to the idle guide portion when the roller assembly rolls thereon due to cam actuation.
  • the idle guide portion of the crank element, the adjustment direction of the crank element and the axis of the pivot's sliding shaft are parallel.
  • the intermediate lever is elastically biased against its respective cam to ensure a force contact with the roller assembly.
  • This may be advantageously achieved by a compression spring fitted around the pivot's sliding shaft, resulting again in a simple and compact structure.
  • the actuator is advantageously provided to operate a reciprocating movement, preferably linear, of the crank element so as to adjust its position relative to the roller assembly of the intermediate lever, and thereby control the portion of guide path on which the latter runs.
  • the technology of the actuator is not critical, but an electric motor with appropriate gearing system is preferred for ease and rapidity of operation.
  • the electric motor is coupled to the crank element by means of a leadscrew that is received in a threaded bore in the crank element.
  • the leadscrew is advantageously of the self-locking type, to prevent repositioning of the crank element due to the force exerted by the cam on the transfer device and thereby allow actuator shut-off upon positioning.
  • FIG.1 A preferred embodiment of the present valve gear assembly is shown individually in Figs.1 and 2 , while its mounting and operating principle in an internal combustion engine is illustrated in Figs. 3 to 5 .
  • reference sign 10 illustrates a cylinder head of an internal combustion engine.
  • this cylinder head extends perpendicularly to the drawing plane along several cylinders.
  • At least one inlet port 12 to a combustion chamber 14 exists per engine cylinder, one stroke valve 16 being provided per inlet port 12 in a known manner.
  • This stroke valve 16 is actuated by a respective cam 18 of a camshaft 20 that may typically be driven by the crankshaft (not shown).
  • the valve 16 rests on a seat 23 surrounding port 12, i.e. the valve is in closed position.
  • the valve stem 22 is guided in an axial bore 24 in the cylinder head and the valve 16 is elastically biased in closing direction by means of a spring 26 surrounding the upper region of the valve stem 22.
  • the present embodiment also employs a rocker finger follower 28 of conventional design having a rocker arm 30 with a central roller 32 that bears at one end on the top of the valve stem 16 and is supported at the opposite end by a hydraulic lash adjuster 34.
  • the valve 16 can be lifted off the seat 23 by acting, from above, on the central roller 32 of the rocker arm 30.
  • a transfer device -generally indicated 36- acting as stroke modifying device is interposed between the cam 18 and the valve 16.
  • the transfer device 36 comprises an intermediate lever 38 having a roller assembly 40 acted upon by the cam 18 and an actuating foot 42 for transmitting an actuating force to the valve 16.
  • the lever 38 is hingedly mounted in the engine (cylinder head) by means of a pivot that is linearly slideable: one end of intermediate lever 38 is pivotable about a pivot element 44, itself slidable along a fixed shaft 46.
  • the transfer device 36 further comprises an adjustable crank element 50 defining a guide path 52 along which the roller assembly 40 is guided.
  • An actuator, generally indicated 54, is provided for adjusting the position of the crank element 50 relative to the intermediate lever 38 (and consequently to the cam 18) so as to vary the portion of guide path 52 on which the roller 40 of the actuating lever 38 is guided and thereby control the maximum valve lift.
  • the roller assembly 40 of the intermediate lever 38 here consists of two outer rollers 40 1 and a central roller 40 2 mounted on a common shaft 56 supported by the a pair of symmetric, bent frame members 58.
  • the bent portion of each frame member 58 is provided with a hole 57 that receives the shaft 56 of the rollers 40 1 and 40 2 , the central roller 40 2 being mounted in between the frame members 58.
  • Actuating foot 42 is embodied by a flat connecting portion 49 bridging the two frame members 58, below the central roller 40 2 .
  • the two frame members 58 are connected to pivot element 44 via bushings 59, allowing the lever 38 to pivot about an axis parallel to that of the rollers 40 1 and 40 2 .
  • the central portion of pivot element 44 has a bore therein that allows linear sliding on fixed pin 46.
  • the camshaft 20 is arranged next to the intermediate lever 38 so that the cam 18 acts on the central roller 40 2 .
  • the outer rollers 40 1 bear against the respective crank paths 52 of the crank element 50.
  • a spring 60 elastically biases the lever 38 in direction of the camshaft 20 so that the roller assembly 40 remains in contact with the cam 18.
  • crank path 52 of the crank element 50 comprises a flat, idle portion 64 adjacent a sloped portion 66 (see Fig.5 ).
  • crank element 50 is positioned so that the roller assembly 40 of the intermediate lever 38 runs on the flat, idle portion 64 of its crank path 52. Indeed, when the crank element 50 is in the shown position, the roller 40 runs only along the flat idle path portion 64, whether the central roller 40 2 is acted upon by the cam base circle 18 1 (constant diameter) or by the cam lobe 18 2. Although the lever 38 is moved, the lower actuating surface 68 of the foot 42 remains parallel to the idle path portion 64 and, irrespective of the displacement of the intermediate lever 38, the rocker finger follower 28 is not pushed downward.
  • crank element 50 To be able to lift the valve 16 off its seat 23 and open the port 12, the crank element 50 must be moved to the left (with respect to drawing plane) by means of the actuator 54 so that the roller 40 is caused to roll on at least a part of the sloped portion 66 of the crank path 52 when the roller 40 is acted upon by the cam lobe 18 2 .
  • Such configuration is shown in Fig.5 .
  • the maximum stroke of the valve 16 can be individually varied by adjusting the position of the crank element 50.
  • actuator 54 it is preferably of the electromagnetic type designed to operate a linear, reciprocating movement of the crank element 50.
  • Actuator 54 hence includes an electric motor 70 coupled to a leadscrew 72 received in a cooperating threaded bore 74 in the crank element 50.
  • the upper side of crank element 50 advantageously bears against a frame member 76.
  • This frame member 76 blocks the rotation of crank element 50 about itself, so that rotation of the leadscrew 72 results in a linear displacement of the crank element 50 without requiring a supplementary guide element.
  • a self locking leadscrew 72 is advantageous to prevent repositioning of the crank element 50 due to the force exerted by the cam 20 on the transfer device and thereby allows shutting-off the actuator 54 upon positioning.
  • the self-locking property of the leadscrew 72 can be adjusted by modifying the thread 78 parameters such e.g. as pitch and tooth attack angle.
  • the leadscrew 72 is rotationally mounted in a bearing 80 and axially locked.
  • the coupling between the electric motor 54 and the leadscrew 72 is achieved by a bevel gear comprising a ring gear 82 mounted on the end of the leadscrew 72 opposite the crank element 50 that meshes with a drive pinion 84 mounted on the motor's output shaft.
  • frame member 76 is designed as a cradle that allows preassembly of all the parts of the transfer device 36 and extends along the cylinder head (perpendicular to the drawing plane). This makes it possible to install at once a number of transfer devices, the cradle being then simply screwed to the cylinder head.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
EP08162684A 2008-08-20 2008-08-20 Ensemble de soupape d'échappement pour moteur à combustion interne Withdrawn EP2157292A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08162684A EP2157292A1 (fr) 2008-08-20 2008-08-20 Ensemble de soupape d'échappement pour moteur à combustion interne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08162684A EP2157292A1 (fr) 2008-08-20 2008-08-20 Ensemble de soupape d'échappement pour moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP2157292A1 true EP2157292A1 (fr) 2010-02-24

Family

ID=40269781

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08162684A Withdrawn EP2157292A1 (fr) 2008-08-20 2008-08-20 Ensemble de soupape d'échappement pour moteur à combustion interne

Country Status (1)

Country Link
EP (1) EP2157292A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017174353A1 (fr) * 2016-04-07 2017-10-12 Bayerische Motoren Werke Aktiengesellschaft Distribution et module moteur
CN112105803A (zh) * 2018-03-06 2020-12-18 伊顿智能动力有限公司 致动装置
FR3137723A1 (fr) * 2022-07-05 2024-01-12 Psa Automobiles Sa Dispositif de linguet en une piece, systeme mecanique de distribution automobile, vehicule et procede sur la base d’un tel dispositif

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0693816A (ja) * 1992-09-16 1994-04-05 Toyota Motor Corp 内燃機関の動弁機構
US5373818A (en) 1993-08-05 1994-12-20 Bayerische Motoren Werke Ag Valve gear assembly for an internal-combustion engine
EP0717174A1 (fr) * 1994-12-12 1996-06-19 Isuzu Motors Limited Système de commande de soupape pour moteur à combustion interne
JP2001132421A (ja) * 1999-11-05 2001-05-15 Toyota Motor Corp 可変動バルブ機構
DE10006015A1 (de) * 2000-02-11 2001-08-16 Schaeffler Waelzlager Ohg Variabler Ventiltrieb zur Laststeuerung einer fremdgezündeten Brennkraftmaschine
WO2002053881A1 (fr) * 2001-01-04 2002-07-11 Fev Motorentechnik Gmbh Mecanisme de distribution mecanique entierement variable pour moteur alternatif
US20030037739A1 (en) 2000-03-31 2003-02-27 Rainer Wurms Variable valve control comprising a sliding-block part and a free travel
WO2003071100A1 (fr) * 2002-02-16 2003-08-28 Mahle Ventiltrieb Gmbh Dispositif de commande de soupapes d'echange gazeux d'un moteur a combustion interne
WO2004001198A1 (fr) * 2002-06-20 2003-12-31 Rudolf Flierl Dispositif de reglage du couple pour soupapes d'un moteur a combustion
JP2004225634A (ja) * 2003-01-23 2004-08-12 Otics Corp 可変動弁機構
JP2005054700A (ja) * 2003-08-05 2005-03-03 Daihatsu Motor Co Ltd 内燃機関におけるデコンプ装置
WO2006136125A1 (fr) * 2005-06-17 2006-12-28 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Mecanisme de commande de soupapes pour moteurs a combustion interne

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0693816A (ja) * 1992-09-16 1994-04-05 Toyota Motor Corp 内燃機関の動弁機構
US5373818A (en) 1993-08-05 1994-12-20 Bayerische Motoren Werke Ag Valve gear assembly for an internal-combustion engine
EP0717174A1 (fr) * 1994-12-12 1996-06-19 Isuzu Motors Limited Système de commande de soupape pour moteur à combustion interne
JP2001132421A (ja) * 1999-11-05 2001-05-15 Toyota Motor Corp 可変動バルブ機構
DE10006015A1 (de) * 2000-02-11 2001-08-16 Schaeffler Waelzlager Ohg Variabler Ventiltrieb zur Laststeuerung einer fremdgezündeten Brennkraftmaschine
US20030037739A1 (en) 2000-03-31 2003-02-27 Rainer Wurms Variable valve control comprising a sliding-block part and a free travel
WO2002053881A1 (fr) * 2001-01-04 2002-07-11 Fev Motorentechnik Gmbh Mecanisme de distribution mecanique entierement variable pour moteur alternatif
WO2003071100A1 (fr) * 2002-02-16 2003-08-28 Mahle Ventiltrieb Gmbh Dispositif de commande de soupapes d'echange gazeux d'un moteur a combustion interne
WO2004001198A1 (fr) * 2002-06-20 2003-12-31 Rudolf Flierl Dispositif de reglage du couple pour soupapes d'un moteur a combustion
JP2004225634A (ja) * 2003-01-23 2004-08-12 Otics Corp 可変動弁機構
JP2005054700A (ja) * 2003-08-05 2005-03-03 Daihatsu Motor Co Ltd 内燃機関におけるデコンプ装置
WO2006136125A1 (fr) * 2005-06-17 2006-12-28 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Mecanisme de commande de soupapes pour moteurs a combustion interne

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017174353A1 (fr) * 2016-04-07 2017-10-12 Bayerische Motoren Werke Aktiengesellschaft Distribution et module moteur
CN112105803A (zh) * 2018-03-06 2020-12-18 伊顿智能动力有限公司 致动装置
US11236643B2 (en) 2018-03-06 2022-02-01 Eaton Intelligent Power Limited Actuation apparatus
FR3137723A1 (fr) * 2022-07-05 2024-01-12 Psa Automobiles Sa Dispositif de linguet en une piece, systeme mecanique de distribution automobile, vehicule et procede sur la base d’un tel dispositif

Similar Documents

Publication Publication Date Title
US7469669B2 (en) Variable valve train mechanism of internal combustion engine
EP1417399B1 (fr) Systeme de commande de soupape reglable comprenant deux cames et un levier de sommation de levee de came
US7305946B2 (en) Variable valve operating apparatus for internal combustion engine
KR100741444B1 (ko) 내연 기관의 가변 밸브 작동 장치
US7591238B2 (en) Variable valve-operating device
US7624711B2 (en) Variable mechanical valve control for an internal combustion engine
US20110186008A1 (en) Engine braking device for an internal combustion engine
ATE333571T1 (de) Ventiltrieb-vorrichtung zur variablen hubverstellung eines gaswechselventils einer brennkraftmaschine
US7044094B2 (en) Valve-lift device for the variable control of gas-exchange valves of an internal combustion engine
US7640900B2 (en) Variable valve operating device
US6659053B1 (en) Fully variable valve train
US20100242878A1 (en) Variable valve apparatus for internal combustion engine
JP2005282573A (ja) 可変リフト装置
JP2015512489A (ja) 機械的に制御可能な動弁アセンブリ、内燃機関ならびに該内燃機関を運転する方法
US7367298B2 (en) Variable valve gear for internal combustion engine
US7644689B2 (en) Variable valve operating device
EP2157292A1 (fr) Ensemble de soupape d'échappement pour moteur à combustion interne
US20060249109A1 (en) Variable valve mechanism
US4495902A (en) Mechanism for variably controlling an internal combustion engine valve
KR100897263B1 (ko) 무단 가변 밸브 리프트 장치
US7363899B2 (en) Valve drive of an internal combustion engine
JP2006207591A (ja) 内燃機関のシリンダバルブ作動システム
JP2011122546A (ja) 内燃機関の可変動弁装置
US20090235885A1 (en) Variable valve actuating apparatus
EP2184453A1 (fr) Ensemble de soupape d'échappement pour moteur à combustion interne

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

AKY No designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20100825