EP3324010A1 - Commande mécanique de soupape - Google Patents

Commande mécanique de soupape Download PDF

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Publication number
EP3324010A1
EP3324010A1 EP17192304.8A EP17192304A EP3324010A1 EP 3324010 A1 EP3324010 A1 EP 3324010A1 EP 17192304 A EP17192304 A EP 17192304A EP 3324010 A1 EP3324010 A1 EP 3324010A1
Authority
EP
European Patent Office
Prior art keywords
roller member
intermediate lever
roller
controllable valve
mechanically controllable
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.)
Granted
Application number
EP17192304.8A
Other languages
German (de)
English (en)
Other versions
EP3324010B1 (fr
Inventor
Roland Kaiser
Dr. Michael Breuer
Christoph Sadowski
Thorsten Schorn
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.)
Pierburg GmbH
Original Assignee
Pierburg 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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP3324010A1 publication Critical patent/EP3324010A1/fr
Application granted granted Critical
Publication of EP3324010B1 publication Critical patent/EP3324010B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01L1/12—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
    • 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
    • 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

Definitions

  • the invention relates to a mechanically controllable valve drive with an intermediate lever with a first roller member, which rotates about a first axis of rotation and cooperates with a circumferential contour of a camshaft, with two valve bodies, in particular a second roller member and a third roller member, which about a common, to the first axis of rotation rotate second offset parallel axis of rotation, wherein the second and third roller member are each in contact with a link and with a peripheral contour of a control shaft, and with a working cam contour over which the intermediate lever acts on a finger lever of a gas exchange valve.
  • valve trains are known from the prior art and are used to reduce fuel consumption and pollutant emissions in motor vehicles with an internal combustion engine.
  • the valve trains usually have an intermediate lever and a roller rocker arm, wherein the intermediate lever and the roller rocker arm are arranged kinematically between a camshaft and a gas exchange valve.
  • the cam rotation is transmitted to the intermediate lever via a first roller mounted in the intermediate lever, wherein the intermediate lever executes a tilting movement and thereby actuates the roller rocker arm via a trained on the intermediate lever working cam contour.
  • the roller cam follower cooperates with the gas exchange valve, so that via the tilting movement and the operation of the roller cam follower actuation of the gas exchange valve takes place.
  • a second roller disposed on the intermediate lever is provided with a control shaft operatively connected, wherein the rotation of the control shaft changes the tilting movement of the intermediate lever or the working curve contour and thereby set the opening and closing movement of the gas exchange valve.
  • the WO 2016/005071 A1 discloses, for example, such a mechanically controllable valve train, wherein the valve train has an intermediate lever which acts on a drag lever via a working cam contour.
  • the intermediate lever has a first roller member with a first axis of rotation and a second roller member with a second axis of rotation, wherein the first roller member with a circumferential contour of a camshaft and the second roller member with a link and a peripheral contour of a control shaft are operatively connected.
  • a disadvantage of the in the WO 2016/005071 A1 disclosed embodiment is that the mechanically controllable valve train has a large space.
  • the invention is therefore the object of further developing a mechanically controllable valve train such that the space of the valve train is reduced, without reducing the rigidity of the valve train.
  • the roller members are each arranged in a transverse plane, wherein the peripheral surfaces of the roller members do not overlap in the axial direction.
  • the intermediate lever on two mutually parallel legs, wherein the first roller member between the two legs is arranged and the legs are arranged between the second and third roller member.
  • the roller members are arranged in different transverse planes, wherein increased by the symmetrical arrangement of the second and third roller member in the intermediate lever, the rigidity of the valve train and tilting of the intermediate lever is avoided.
  • the second roller member and the third roller member are connected to each other via a shaft, wherein the shaft is mounted via a bearing unit in the intermediate lever.
  • the second roller member and the third roller member via a non-positive or positive connection with the shaft rotatably connected.
  • the intermediate lever has a sleeve which is fixedly arranged in the intermediate lever and connects the two legs with each other.
  • a bearing unit is arranged, for example, a needle bearing, via which the shaft is rotatably mounted in the sleeve.
  • the second roller member and the third roller member are connected via press-connections with the shaft, whereby the roller members are reliably rotatably connected to the shaft, without to require assembly of additional components, such as circlips or feather keys.
  • the second roller member and the third roller member are rotatably mounted on an axle, wherein the axis is fixedly connected to the intermediate lever and the second roller member and the third roller member are rotatably mounted on the axle via a respective bearing unit.
  • the storage units required for the rotatable mounting of the second and third bearing member are arranged outside of the intermediate lever. The arrangement of the bearing members outside of the intermediate lever, the distance between the camshaft and the intermediate lever is reduced because the cam of the camshaft during its rotational movement can continue to engage in the intermediate lever. In this way, the space of the mechanically controllable valve train is reduced.
  • FIG. 1 shows a mechanically controllable valve train 2 for a gas exchange valve 4 with an intermediate lever 6 and a drag lever 8, wherein the intermediate lever 6 via a working cam contour 22 with a rocker arm 8 rotatably mounted cam follower roller 24 cooperates.
  • the drag lever 8 is operatively connected to a gas exchange valve 4 loaded by a spring 5 and to a valve play compensation element 28, so that the drag lever 8 rests without play on the gas exchange valve 4 and the gas exchange valve 4 is actuated via the drag lever 8.
  • the intermediate lever 6 has a first roller member 10, which is rotatably supported via a first bearing unit 12 on the intermediate lever 6 and rotates about a first axis of rotation 11.
  • the first roller member 10 is with its peripheral surface with a cam 15 of a camshaft 14 in contact and transmits the camshaft rotational movement to the intermediate lever 6, wherein the intermediate lever 6 performs a pivoting movement.
  • the intermediate lever 6 has a rotatably mounted in the intermediate lever 6 second and third roller member 16, 18, wherein in FIG. 1 only the second roller member 16 is shown. Both roller members 16, 18 rotate about a second axis of rotation 17, wherein the axis of rotation 17 is arranged offset from the first axis of rotation 11.
  • the two roller members 16, 18 are each with a control shaft 19 and a link 20 in engagement.
  • the control shaft 19 is rotatable by an actuator not shown in predefined positions and has a cam, so that on the rotation of the control shaft 19, the position of the intermediate lever 6 and thereby the operation of the gas exchange valve 4 is controllable.
  • the gate 20 is for example arranged rigidly in the cylinder head and serves as a guide of the intermediate lever 6 during its position change.
  • FIG. 2 shows a first embodiment and FIG. 3 a second embodiment of the storage of the second and third roller member 16, 18.
  • Die Figures 2 and 3 show an intermediate lever 6 having a first and a second leg 30, 32.
  • the legs 30, 32 are connected via a working curve contour 22 forming web 34, an axis 36 and a sleeve 38 and an axle 46 with each other.
  • the bearing unit 12 is arranged, via which the first roller member 10 is mounted in the intermediate lever 6.
  • the sleeve 38 serves as a receptacle of a shaft 42.
  • the second roller member 16 is rotatably connected to the shaft 42 and at a second end of the shaft 42, the third roller member 18 with the shaft 42 rotatably connected.
  • the shaft 42 is rotatably supported via a second bearing unit 44 in the sleeve.
  • FIG. 3 shown second embodiment of the in FIG. 2 shown first embodiment is that instead of the sleeve 38, an axle 46 is fixedly arranged in the intermediate lever 6. At the two ends of the axle 46, a respective bearing unit 48, 50 is arranged, wherein on the bearing unit 48, the second roller member 16 and the bearing unit 50, the third roller member 18 are rotatably mounted on the axle 46.
  • roller members 12, 16, 18 causes each roller member 12, 16, 18 is arranged in each case a transverse plane and the peripheral surfaces of the roller members 12, 16, 18 in the longitudinal direction of the shaft 42 and the axis 46 does not overlap ,
  • the camshaft can be arranged closer to the intermediate lever 6, whereby the space of the mechanically controllable valve train 2 is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Mechanically-Actuated Valves (AREA)
EP17192304.8A 2016-11-18 2017-09-21 Commande mécanique de soupape Active EP3324010B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016122179.1A DE102016122179A1 (de) 2016-11-18 2016-11-18 Mechanisch steuerbarer Ventiltrieb

Publications (2)

Publication Number Publication Date
EP3324010A1 true EP3324010A1 (fr) 2018-05-23
EP3324010B1 EP3324010B1 (fr) 2019-10-30

Family

ID=59930221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17192304.8A Active EP3324010B1 (fr) 2016-11-18 2017-09-21 Commande mécanique de soupape

Country Status (2)

Country Link
EP (1) EP3324010B1 (fr)
DE (1) DE102016122179A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1387048A2 (fr) * 2002-08-02 2004-02-04 Bayerische Motoren Werke Aktiengesellschaft Levier oscillant pour commande de soupape à course variable
WO2012107119A1 (fr) * 2011-02-10 2012-08-16 Schaeffler Technologies AG & Co. KG Levier intermédiaire
WO2016005071A1 (fr) * 2014-07-09 2016-01-14 Pierburg Gmbh Mécanisme de distribution à commande mécanique
CN103742219B (zh) * 2013-12-30 2016-05-11 长城汽车股份有限公司 用于发动机的配气机构及具有其的车辆

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3519319A1 (de) * 1985-05-30 1986-12-04 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Variable ventilsteuerung fuer eine hubkolben-brennkraftmaschine
DE4301453C2 (de) * 1993-01-20 1995-01-05 Meta Motoren Energietech Variable Ventilsteuerung von Brennkraftmaschinen
DE4322480C2 (de) * 1993-07-06 1996-05-02 Meta Motoren Energietech Vorrichtung zur variablen Ventilsteuerung von Brennkraftmaschinen
GB2378729A (en) * 2001-08-18 2003-02-19 Mechadyne Plc Adjustable engine valve control system
DE102015118884A1 (de) * 2015-11-04 2017-05-04 Pierburg Gmbh Mechanisch steuerbarer Ventiltrieb

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1387048A2 (fr) * 2002-08-02 2004-02-04 Bayerische Motoren Werke Aktiengesellschaft Levier oscillant pour commande de soupape à course variable
WO2012107119A1 (fr) * 2011-02-10 2012-08-16 Schaeffler Technologies AG & Co. KG Levier intermédiaire
CN103742219B (zh) * 2013-12-30 2016-05-11 长城汽车股份有限公司 用于发动机的配气机构及具有其的车辆
WO2016005071A1 (fr) * 2014-07-09 2016-01-14 Pierburg Gmbh Mécanisme de distribution à commande mécanique

Also Published As

Publication number Publication date
EP3324010B1 (fr) 2019-10-30
DE102016122179A1 (de) 2018-05-24

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