EP1380728A1 - Dispositif de commande de soupape - Google Patents

Dispositif de commande de soupape Download PDF

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Publication number
EP1380728A1
EP1380728A1 EP02450157A EP02450157A EP1380728A1 EP 1380728 A1 EP1380728 A1 EP 1380728A1 EP 02450157 A EP02450157 A EP 02450157A EP 02450157 A EP02450157 A EP 02450157A EP 1380728 A1 EP1380728 A1 EP 1380728A1
Authority
EP
European Patent Office
Prior art keywords
valve
limiting element
drive device
stroke
lift
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
EP02450157A
Other languages
German (de)
English (en)
Other versions
EP1380728B1 (fr
Inventor
Christian Dipl.-Ing. Seltenhammer
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.)
AVL List GmbH
Original Assignee
AVL List 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 AVL List GmbH filed Critical AVL List GmbH
Priority to EP20020450157 priority Critical patent/EP1380728B1/fr
Priority to DE50202718T priority patent/DE50202718D1/de
Publication of EP1380728A1 publication Critical patent/EP1380728A1/fr
Application granted granted Critical
Publication of EP1380728B1 publication Critical patent/EP1380728B1/fr
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
    • 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
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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
    • F01L13/0031—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 tappet or pushrod length

Definitions

  • the invention relates to a valve drive device for at least one lift valve for an internal combustion engine, the stroke of the lift valve being variably adjustable is, with a camshaft with at least one cam, which is on a valve stem of the lift valve in the opening direction against one preferably by acts a first valve spring formed closing force.
  • valve train mechanisms are known with which the valve lift of a gas exchange valve of an internal combustion engine can be changed.
  • US 5,365,895 A discloses a variable valve lift mechanism for a Internal combustion engine, by changing the position of the lever axis variable valve lift is achieved. Also in US 4,714,057 A, the US 4,724,822 A, US 4,986,227 A, US 4,638,773 A, US 4,397,270 A. or US 3,413,965 A, the valve lift is changed by changing the axis of rotation of the valve actuation lever.
  • the disadvantage is that in the in most cases a relatively space-consuming and consisting of many parts Adjustment mechanism for the axis of rotation must be provided.
  • the object of the present invention is to provide a simple as possible Space-saving variable valve train device consisting of a few individual parts to accomplish.
  • an elastic transmission member is arranged in the effective path between the cam and the valve stem and that a adjustable stroke limiting element is provided against the opening force of the cam act on the valve tappet or the transmission link can, the stroke limiting element in at least one activation position the opening path of the globe valve with elastic change in shape of the transmission member limited to a predefined value.
  • the elastic transmission link advantageously has one preferably formed by a compression spring second valve spring with a greater spring stiffness than the first valve spring on.
  • the stroke limiting device can be used as a slide, as a single-arm or as a two-arm Lever be trained.
  • an activation device preferably formed by an eccentric acts on the stroke limiting element in the sense of a stroke limitation.
  • the stroke limiting element is preferably one has sleeve-shaped stop part, which in at least one activation position on the valve stem or on the transmission link the opening direction of the globe valve acts in the sense of a stroke limitation.
  • Stroke limiting element has a damping body, which is preferably is arranged between the stop part and the slide or lever.
  • the Damping body can preferably by at least one plate spring be educated.
  • a hydraulic, pneumatic or electrical actuating device can be provided.
  • the valve drive device 1 for at least one lift valve 2 of an internal combustion engine has a camshaft 3 with at least one cam 4, which via an elastic transmission member 5 to the valve stem 6 of the lift valve 2 acts in the opening direction against the closing force of a first valve spring 7.
  • the transmission member 5 has one within two cup-like pistons 8, 9 second valve spring 20, which is designed as a compression spring and the two Pistons 8, 9 press apart.
  • the first piston 8 is in a guide cylinder 10 of the cylinder housing 11, the second piston 9 within the first Piston 8 slidably mounted, the second piston 9 by a locking ring 12 is held within the first piston 8.
  • a stroke limiting element is used to variably limit the valve stroke of the lift valve 2 13 is provided, which in the activated state in the exemplary embodiments acts on the second piston 9 against the opening movement. It is also conceivable that the stroke limiting element 13 directly on the Valve stem 6 acts.
  • the stroke limiting element 13 has in the contact area with the elastic Transmission member 5 a stop part formed by a sleeve or the like 14, which in a recess 15 - for example a bore or a slot - the stroke limiting element 13 is arranged.
  • the stop part 14 is designed as a hollow body or as a U-shaped body in cross section and at least partially includes the valve stem 6.
  • On the transmission member facing side of the stroke limiting element 13 is between the stroke limiting element 13 and the stop part 14 one by two plate springs 16 formed damping part arranged. This damping part prevents too hard an impact of the stop member 14 on the second piston 9 of the transmission member 5th
  • the stroke limiting element is 13 formed by a two-armed lever 13a which by one Axis 25 is pivotable and on which one formed by an eccentric 17 Actuating device 18 acts.
  • Fig. 3 shows an embodiment variant, at which the stroke limiting element 13 is formed by a one-armed lever 13b is.
  • the actuating device 18 is on the valve plate 2a of the lift valve 2 facing side of the stroke limiting element 13 is arranged.
  • the Levers 13a, 13b must always be very rigid.
  • Fig. 4 shows a third embodiment, in which the stroke limiting element 13 is also designed as a one-armed lever 13c.
  • the eccentric 17 of the actuator 18 engages in a connecting rod eye 19 of the one-armed lever 13c on.
  • valve drive device 1 shows the valve drive device 1 with the stroke limiting element deactivated 13.
  • the eccentric 17 is in its rest position.
  • the cam 4 of the camshaft 3 acts on the valve stem via the elastic transmission member 5 6 a. Since the second valve spring 20 has a much greater spring stiffness is designed as the first valve spring 7, is - with deactivated stroke limiting element 13 - the second valve spring 20 is not deflected, so that the by the cam 4 predetermined maximum valve lift unimpeded on the Lift valve 2 is transmitted.
  • valve seat ring 27 is arranged, which with the valve plate 2a interacts.
  • Fig. 2 shows the valve drive device 1 with activated stroke limiting element 13.
  • the eccentric 17 is rotated into an activation position so that the lever 13a is deflected by a distance h e.
  • the stop part 14 is thereby pressed in the direction of the transmission member 5.
  • the cam 4 of the camshaft 3 simultaneously acts on the first piston 8 and displaces it by a distance h n . Since the second piston 9 is prevented from further deflection by the stop part 14 of the stroke limiting element 13, the second valve spring 20 is compressed and the stroke movement due to the cam 4 is at least partially absorbed by the transmission element 5.
  • the actual valve stroke h v thus corresponds to the instantaneous cam stroke h n as long as this is smaller than the path h 0 -he / x, which is released by the stroke limiting element 13.
  • valve lift h is plotted against the crank angle KW.
  • the solid line 30 shows the valve lift when not activated Stroke limiting element 13.
  • the course is with broken lines 31, 32, 33 the valve stroke h shown when stroke limiting element 13 moderate, medium or is heavily activated.
  • FIG. 6 corresponds to that of FIG. 5 with the difference that with 30a and 30b the valve stroke h for a by turning the camshaft 3 effected adjustment of the phase position shown in the direction of the double arrow 34 is.
  • the levels of lines 31, 32, and 33 are not changed.
  • valve drive device 1 described enables very space-saving and Variable valve lift limitation in a simple manner with very few individual parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
EP20020450157 2002-07-12 2002-07-12 Dispositif de commande de soupape Expired - Lifetime EP1380728B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20020450157 EP1380728B1 (fr) 2002-07-12 2002-07-12 Dispositif de commande de soupape
DE50202718T DE50202718D1 (de) 2002-07-12 2002-07-12 Ventiltriebseinrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20020450157 EP1380728B1 (fr) 2002-07-12 2002-07-12 Dispositif de commande de soupape

Publications (2)

Publication Number Publication Date
EP1380728A1 true EP1380728A1 (fr) 2004-01-14
EP1380728B1 EP1380728B1 (fr) 2005-04-06

Family

ID=29724622

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020450157 Expired - Lifetime EP1380728B1 (fr) 2002-07-12 2002-07-12 Dispositif de commande de soupape

Country Status (2)

Country Link
EP (1) EP1380728B1 (fr)
DE (1) DE50202718D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018588A1 (de) * 2006-04-21 2007-10-25 Schaeffler Kg Ventilbetätigungseinrichtung, insbesondere für Gaswechselventile von Hubkolbenbrennkraftmaschinen
GB2566489A (en) * 2017-09-15 2019-03-20 Camcon Auto Ltd Actuation assembly and methods of operation thereof
CN109854323A (zh) * 2019-03-12 2019-06-07 北方工业大学 低功耗响应迅速的活塞发动机气门装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012009621B4 (de) * 2012-05-15 2023-06-29 Neumayer Tekfor Engineering Gmbh Ventilbetätigungsvorrichtung für einen Verbrennungsmotor

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3413965A (en) 1967-07-13 1968-12-03 Ford Motor Co Mechanism for varying the operation of a reciprocating member
US4397270A (en) 1979-04-13 1983-08-09 Nissan Motor Co., Ltd. Valve operating mechanism for internal combustion engines
JPS60162004A (ja) * 1984-01-31 1985-08-23 Mitsubishi Motors Corp 弁作動停止装置付きエンジン動弁機構
US4638773A (en) 1986-02-28 1987-01-27 General Motors Corporation Variable valve lift/timing mechanism
US4714057A (en) 1985-05-30 1987-12-22 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Variable valve control system for a piston internal-combustion engine
US4724822A (en) 1986-02-28 1988-02-16 General Motors Corporation Variable valve lift/timing mechanism
US4986227A (en) 1990-05-08 1991-01-22 Dewey Iii Albert B Variable lift valve train
FR2676501A1 (fr) * 1991-05-15 1992-11-20 Peugeot Dispositif d'actionnement d'une soupape pour en faire varier la levee et/ou le calage.
US5365895A (en) 1991-12-03 1994-11-22 Motive Holdings Limited Variable valve lift mechanism for internal combustion engine
US20010013325A1 (en) * 2000-02-10 2001-08-16 Gianluigi Buglioni Valves for i.c. engines with variable lifts and timings
US6293239B1 (en) * 1997-03-26 2001-09-25 Daimlerchrysler Ag Valve gear for gas exchange valves of internal combustion engines

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3413965A (en) 1967-07-13 1968-12-03 Ford Motor Co Mechanism for varying the operation of a reciprocating member
US4397270A (en) 1979-04-13 1983-08-09 Nissan Motor Co., Ltd. Valve operating mechanism for internal combustion engines
JPS60162004A (ja) * 1984-01-31 1985-08-23 Mitsubishi Motors Corp 弁作動停止装置付きエンジン動弁機構
US4714057A (en) 1985-05-30 1987-12-22 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Variable valve control system for a piston internal-combustion engine
US4638773A (en) 1986-02-28 1987-01-27 General Motors Corporation Variable valve lift/timing mechanism
US4724822A (en) 1986-02-28 1988-02-16 General Motors Corporation Variable valve lift/timing mechanism
US4986227A (en) 1990-05-08 1991-01-22 Dewey Iii Albert B Variable lift valve train
FR2676501A1 (fr) * 1991-05-15 1992-11-20 Peugeot Dispositif d'actionnement d'une soupape pour en faire varier la levee et/ou le calage.
US5365895A (en) 1991-12-03 1994-11-22 Motive Holdings Limited Variable valve lift mechanism for internal combustion engine
US6293239B1 (en) * 1997-03-26 2001-09-25 Daimlerchrysler Ag Valve gear for gas exchange valves of internal combustion engines
US20010013325A1 (en) * 2000-02-10 2001-08-16 Gianluigi Buglioni Valves for i.c. engines with variable lifts and timings

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 330 (M - 442) 25 December 1985 (1985-12-25) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018588A1 (de) * 2006-04-21 2007-10-25 Schaeffler Kg Ventilbetätigungseinrichtung, insbesondere für Gaswechselventile von Hubkolbenbrennkraftmaschinen
GB2566489A (en) * 2017-09-15 2019-03-20 Camcon Auto Ltd Actuation assembly and methods of operation thereof
CN109854323A (zh) * 2019-03-12 2019-06-07 北方工业大学 低功耗响应迅速的活塞发动机气门装置

Also Published As

Publication number Publication date
EP1380728B1 (fr) 2005-04-06
DE50202718D1 (de) 2005-05-12

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