EP0636206B1 - Ventilbetätigungsmechanismus für eine brennkraftmaschine - Google Patents

Ventilbetätigungsmechanismus für eine brennkraftmaschine Download PDF

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Publication number
EP0636206B1
EP0636206B1 EP93908895A EP93908895A EP0636206B1 EP 0636206 B1 EP0636206 B1 EP 0636206B1 EP 93908895 A EP93908895 A EP 93908895A EP 93908895 A EP93908895 A EP 93908895A EP 0636206 B1 EP0636206 B1 EP 0636206B1
Authority
EP
European Patent Office
Prior art keywords
valve
pistons
levers
valve levers
speed range
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.)
Expired - Lifetime
Application number
EP93908895A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0636206A1 (de
Inventor
Michael Paul
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.)
Audi AG
Original Assignee
Audi AG
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Filing date
Publication date
Application filed by Audi AG filed Critical Audi AG
Publication of EP0636206A1 publication Critical patent/EP0636206A1/de
Application granted granted Critical
Publication of EP0636206B1 publication Critical patent/EP0636206B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • the invention relates to a valve actuation mechanism for an internal combustion engine according to the preamble of claim 1.
  • the pistons are displaced such that they penetrate the parting planes, as a result of which the second rocker arms are connected to the first rocker arms and the valves are actuated by the second rocker arms in accordance with the cam contour of the cams assigned to the second rocker arms.
  • This enables different valve strokes and different opening times for the valves in the lower and in the upper speed range.
  • the disadvantage of this known construction is that in the lower speed range the pistons with their end faces constantly slide on each other and that a very high precision is required in the manufacture of the pistons and the bores.
  • the invention has for its object to provide a valve actuation mechanism of the generic type, in which the wear is reduced and the manufacture is simplified.
  • the pistons are retracted by their springs in the lower speed range, so that there is no contact with the second rocker arms.
  • the bores and the pistons in the first rocker arms preferably have a circular cross section.
  • the end sections of the pistons which interact with the underside of the crossmember in the upper speed range, can have a flat surface, as a result of which flat contact between the pistons and the crossmember is achieved and the surface pressure is correspondingly reduced.
  • valve train for three intake valves E is shown. Each valve E is acted upon by a spring 1 in the closing direction.
  • the valves are operated by their own cams 2, 3 and 4 of a camshaft 5 via first rocker arms 6, which are pivotably mounted on a common fixed axis 7.
  • the cams 2, 3 and 4 preferably have different cam profiles in order to achieve a different valve lift, a different opening duration and / or different control times for the individual intake valves and to create optimal conditions in the lower and middle speed range of the internal combustion engine.
  • second cams 8 are provided on the camshaft 5 with an identical cam profile, which is designed for the conditions in the upper speed range of the internal combustion engine, that is, for example, produces a larger valve lift and a longer opening time.
  • second cams 8 interact second rocker arms 9, which can be coupled in the upper speed range with the first rocker arms 6, so that in this speed range the valves E are operated according to the contour of the cams 8.
  • the free ends of the second rocker arms 9 are connected to one another by a traverse 10 which runs in front of and at a short distance from the free ends of the first rocker arms 6.
  • first rocker arms 6 are provided for the pivot axis 7 radial bores 11, in each of which a piston 12 is arranged, which is displaceable between a first, inner position and a second outer position, in which the piston protrudes from its rocker arm 6.
  • the pistons 12 In this second position, shown in FIG. 1, the pistons 12 cooperate with the flat underside 10a of the cross member 10, so that the second rocker arms 9 can actuate the valves E via the first rocker arms 6 in accordance with the contour of the cams 8.
  • the displacement of the pistons 12 to the outside takes place with the aid of a pressure medium which is supplied through a channel 14 in the axis 7, which is connected to the bores 11.
  • the pistons 12 are returned into their bores 11 by a spring 13, so that the second rocker arms 9 can swing freely and the actuation of the valves by the first rocker arms 6 in accordance with the contour of the cams 2, 3 and 4 he follows.
  • the spring 13 is supported on the one hand on an insert 15 fixed in the bore 11 and on the other hand on the end of a sleeve 16 which is fastened to the piston 12 and extends through the insert 15.
  • Each rocker arm 6 or 9 has a sliding surface 17 with which it rests on its cam 2, 3, 4 or 8.
  • the second rocker arms 9 are held in contact with their cams by a spring 18.
  • the spring 18 is arranged on a spark plug dome 19 and is supported on the one hand on a stationary spring plate 20 and on the other hand on a displaceable spring plate 21, which cooperates with extensions 22 of the second rocker arms 9, which partially encompass the spark plug dome.
  • the end sections of the pistons 12 are provided with flat surfaces 23 on which the cross member 10 with its flat underside 10a rests when the pistons 12 are in the pushed-out position shown.
  • the surface pressure between the cross member 10 and the piston 13 is thus reduced.
  • an anti-rotation device is provided in the form of a pin 24 which is inserted in the rocker arms 6 and with its lower end face on the flat surface 23 of the piston rests. In the pushed-out position, the shoulder 25 created by the flat surface 23 bears against the pin 24, as a result of which the outward movement of the piston 12 is limited.

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)
EP93908895A 1992-04-16 1993-04-02 Ventilbetätigungsmechanismus für eine brennkraftmaschine Expired - Lifetime EP0636206B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4212844A DE4212844A1 (de) 1992-04-16 1992-04-16 Ventilbetätigungsmechanismus für eine Brennkraftmaschine
DE4212844 1992-04-16
PCT/EP1993/000822 WO1993021427A1 (de) 1992-04-16 1993-04-02 Ventilbetätigungsmechanismus für eine brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0636206A1 EP0636206A1 (de) 1995-02-01
EP0636206B1 true EP0636206B1 (de) 1996-07-17

Family

ID=6457003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93908895A Expired - Lifetime EP0636206B1 (de) 1992-04-16 1993-04-02 Ventilbetätigungsmechanismus für eine brennkraftmaschine

Country Status (5)

Country Link
US (1) US5463988A (ja)
EP (1) EP0636206B1 (ja)
JP (1) JPH07505462A (ja)
DE (2) DE4212844A1 (ja)
WO (1) WO1993021427A1 (ja)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4317638C1 (de) * 1993-05-27 1994-08-18 Audi Ag Ventilbetätigungsvorrichtung für eine Mehrzylinder-Brennkraftmaschine
US5615647A (en) * 1995-03-28 1997-04-01 Eaton Corporation Latch assembly for a valve control system
JP3402853B2 (ja) * 1995-04-12 2003-05-06 ヤマハ発動機株式会社 エンジンの動弁装置
DE19621463A1 (de) * 1996-05-29 1997-12-04 Schaeffler Waelzlager Kg Als Schwing- bzw. Kipphebel ausgebildeter Nockenfolger eines Ventiltriebs einer Brennkraftmaschine
US6668779B2 (en) * 2002-05-08 2003-12-30 Delphi Technologies, Inc. Two-step finger follower rocker arm assembly
DE10310220A1 (de) * 2003-03-08 2004-09-16 Daimlerchrysler Ag Vorrichtung zur Koppelung bzw. Entkoppelung zweier Betätigungshebel eines Ventiltriebes einer Brennkraftmaschine und Verfahren hierzu
DE102004007766A1 (de) 2003-03-20 2004-09-30 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE10318295A1 (de) 2003-04-23 2004-11-11 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE10344406A1 (de) * 2003-09-25 2005-04-28 Ina Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE10345307A1 (de) * 2003-09-30 2005-04-14 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE102004017103A1 (de) * 2004-04-07 2005-10-27 Ina-Schaeffler Kg Umschaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE102004039503A1 (de) * 2004-08-14 2006-03-02 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmaschine
DE102004048289A1 (de) * 2004-10-05 2006-04-27 Ina-Schaeffler Kg Schlepphebel eines Ventiltriebs einer Brennkraftmashchine
DE102004051422A1 (de) * 2004-10-22 2006-05-24 Schaeffler Kg Schaltbarer Schlepphebel
DE102005003745A1 (de) * 2005-01-27 2006-08-10 Schaeffler Kg Abschaltbares Abstützelement für einen Ventiltrieb einer Brennkraftmaschine
US7318402B2 (en) * 2005-11-21 2008-01-15 Eaton Corporation Dual lift rocker arm latch mechanism and actuation arrangement therefor
DE102007022826A1 (de) * 2007-05-15 2008-11-20 Schaeffler Kg Bauteil für einen Ventiltrieb einer Brennkraftmaschine
DE102008027649A1 (de) * 2008-06-10 2009-12-17 Man Diesel Se Ventilbetrieb für eine Brennkraftmaschine
CN101457677B (zh) * 2008-12-31 2010-09-08 奇瑞汽车股份有限公司 一种可变气门配气机构
JP5535695B2 (ja) * 2010-03-08 2014-07-02 忠孝 山手 エンジン
WO2011116329A2 (en) * 2010-03-19 2011-09-22 Eaton Corporation Switching rocker arm

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62121811A (ja) * 1985-07-31 1987-06-03 Honda Motor Co Ltd 内燃機関の動弁装置
DE3800347A1 (de) * 1987-01-08 1988-09-29 Honda Motor Co Ltd Ventilbetaetigungsvorrichtung in einer brennkraftmaschine
JPH03149306A (ja) * 1989-11-02 1991-06-25 Nissan Motor Co Ltd エンジンの弁作動装置
FR2663682B1 (fr) * 1990-06-21 1992-10-16 Peugeot Dispositif a amplitude variable pour la levee d'au moins une soupape de moteur a combustion interne.
FR2674287B1 (fr) * 1991-03-19 1993-07-23 Peugeot Commande hydraulique pour mecanisme de levee a amplitude variable d'au moins une soupape de moteur a combustion interne.
JP2612788B2 (ja) * 1991-09-04 1997-05-21 本田技研工業株式会社 内燃機関の動弁装置
DE69301140T2 (de) * 1992-09-16 1996-05-15 Honda Motor Co Ltd Ventiltriebanordnung für eine Brennkraftmaschine

Also Published As

Publication number Publication date
DE59303266D1 (de) 1996-08-22
JPH07505462A (ja) 1995-06-15
WO1993021427A1 (de) 1993-10-28
EP0636206A1 (de) 1995-02-01
DE4212844A1 (de) 1993-10-21
US5463988A (en) 1995-11-07

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