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EP2295739A1 - Commande de soupape d'un moteur à combustion interne - Google Patents

Commande de soupape d'un moteur à combustion interne Download PDF

Info

Publication number
EP2295739A1
EP2295739A1 EP10169651A EP10169651A EP2295739A1 EP 2295739 A1 EP2295739 A1 EP 2295739A1 EP 10169651 A EP10169651 A EP 10169651A EP 10169651 A EP10169651 A EP 10169651A EP 2295739 A1 EP2295739 A1 EP 2295739A1
Authority
EP
European Patent Office
Prior art keywords
drag lever
valve
support element
transverse strut
gear according
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
EP10169651A
Other languages
German (de)
English (en)
Other versions
EP2295739B1 (fr
Inventor
Helmut Engelhardt
Ulrich Linnenbrink
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2295739A1 publication Critical patent/EP2295739A1/fr
Application granted granted Critical
Publication of EP2295739B1 publication Critical patent/EP2295739B1/fr
Not-in-force 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
    • 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
    • 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
    • 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
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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 variable cam follower valve train of an internal combustion engine, with two equally-acting gas exchange valves per cylinder and with disconnectable support elements.
  • the object of the invention is therefore to propose a variable valve train, which can be used in tight cylinder head conditions and whose construction costs and costs are within limits.
  • this object is achieved by the combination of a disconnectable support element with only one rocker arm for two identical gas exchange valves per cylinder of the engine, which rocker arm is shown either as a fork rocker lever, which simultaneously actuates two equally effective gas exchange valves at its other end or which rocker arm as "classic" bar-shaped component is present and acts at its other end to a gas exchange valves connecting cross member and wherein the support element is implemented in a seated between two gas channels receiving the cylinder head, which recording is preferably deeper than a top of the gas channels according to a preferred embodiment of the invention.
  • the drag lever in the region of its other end should have a cross strut, which is an integral part of this and which acts with its underside on the same gas exchange valves in the lifting sense.
  • the drag lever here has a fork-like geometry in plan view.
  • the drag lever is called "classic", bar-shaped component provided from the mass production, which acts in the region of its other end on a separate crossbar, which bridges the respective gas exchange valves.
  • the drag lever is made of inexpensive sheet metal and, for example, be punched from a board or tape.
  • Abstützbarer Abschaltbarer design is a well-known from the prior art component in question (see, for example. DE 102 47 949 A1 ). This can ultimately be used unaltered and possibly hinged to the rocker arm as a unit to be delivered.
  • a particularly low-friction cam tap on the drag lever is present when the drag lever is provided for this purpose with a rotatable roller. Alternatively, a sliding surface is provided.
  • the support element should be provided with a hydraulic clearance compensation device, so that unnecessary mechanical clearance adjustment.
  • a cylinder deactivation is to be realized via the proposed inventive design, as is useful in internal combustion engines with a number of cylinders>5; but not exclusively.
  • FIG. 1 Is shown in FIG. 1 a variable valve train 1 of an internal combustion engine.
  • FIG. 3 this shows in more detail, each cylinder 4 two in the camshaft direction one behind the other, equivalent gas exchange valves 2, 3 are provided.
  • a fork-like drag lever 10 On the gas exchange valves 2, 3 is a fork-like drag lever 10 with a trained at its other end 15 cross member 14.
  • a lateral guidance of the drag lever 10 on the gas exchange valves 2, 3 is realized by guide plates 19.
  • the latter go, as closer in FIG. 1 discloses from an end face 20 of the toggle lever 10 at the other end 15 and are bent on a bottom 18 of the finger lever 10.
  • a guide takes place on inner sides 21 of the gas exchange valves 2, 3.
  • the support member 5 is optimally positioned with its receptacle 8 between the gas channels 6, 7 (see FIG. 3 ). A reason of its inclusion 8 can thus also run deeper than an upper side of the gas channels 6, 7.
  • the aforementioned transverse strut 14 of the finger lever 10 may also be formed separately, so that the drag lever 10 acts with its other end 15 on an upper side of the transverse strut 14, in which case the drag lever 10 has a completely elongated, beam-like design.
  • the drag lever 10 is made of thin-walled steel sheet and has two upright side walls 17, which are connected by a crossbar 16, so that there is a U-shaped profile in cross section. From FIG. 1 an apparent role in the follower lever 10 forms a cam contact surface 13 for a not shown lifting cam of a corresponding intake or exhaust camshaft (DOHC valve train).
  • DOHC valve train corresponding intake or exhaust camshaft
  • FIG. 2 apparent support 5 disconnectable type will not be described in detail at this point, because it is well known to the art.
  • it consists of a pot-like housing 22, which sits in the receptacle 8 of the cylinder head 9.
  • an inner element 23 is telescopically installed, which has radially extendable coupling means 24.
  • the coupling means 24 are retracted via hydraulic fluid pressure so that the inner member 23 completes an idle stroke relative to the housing 22, as the pivot point for the drag lever 10 then the gas exchange valves 2, 3 count, which thus remain closed.
  • valve drive 1 proposed here is also conceivable and provided for cylinder heads with internal support elements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP10169651A 2009-08-13 2010-07-15 Commande de soupape d'un moteur à combustion interne Not-in-force EP2295739B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009037496A DE102009037496A1 (de) 2009-08-13 2009-08-13 Ventiltrieb einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP2295739A1 true EP2295739A1 (fr) 2011-03-16
EP2295739B1 EP2295739B1 (fr) 2012-03-28

Family

ID=43334364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10169651A Not-in-force EP2295739B1 (fr) 2009-08-13 2010-07-15 Commande de soupape d'un moteur à combustion interne

Country Status (3)

Country Link
EP (1) EP2295739B1 (fr)
AT (1) ATE551504T1 (fr)
DE (1) DE102009037496A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021073680A1 (fr) * 2019-10-16 2021-04-22 Schaeffler Technologies AG & Co. KG Crosse de type poutre destinée à un train de soupapes d'un moteur à combustion interne à usage intensif

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015215194A1 (de) 2015-08-10 2017-02-16 Schaeffler Technologies AG & Co. KG Nockenfolgerhebel
GB201522269D0 (en) * 2015-12-17 2016-02-03 Eaton Srl Hydraulic lash adjuster

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512493A1 (fr) * 1981-09-10 1983-03-11 Honda Motor Co Ltd Moteur a combustion interne
EP0462853A1 (fr) * 1990-06-21 1991-12-27 Automobiles Peugeot Dispositif à amplitude variable pour la levée d'au moins une soupape de moteur à combustion interne
EP0505231A1 (fr) * 1991-03-19 1992-09-23 Automobiles Peugeot Commande hydraulique pour mécanisme de levée à amplitude variable d'au moins une soupape de moteur à combustion interne
US5259346A (en) * 1992-11-05 1993-11-09 Henley Manufacturing Holding Company, Inc. Rocker arm of the cam-follower type for operating two valves
DE19537641A1 (de) * 1995-10-10 1997-04-17 Bayerische Motoren Werke Ag Punktgelagerter Schwing- oder Kipphebel
DE10247949A1 (de) 2002-10-15 2004-04-29 Ina-Schaeffler Kg Schaltbares Abstützelement für einen Ventiltrieb einer Brennkraftmaschine
DE102007020108A1 (de) * 2007-04-28 2008-10-30 Schaeffler Kg Raumnockenventiltrieb mit einem Nockenfolger zur Ausführung einer Schwenk- oder Kippbewegung um eine Bewegungsachse im Zylinderkopf einer Brennkraftmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512493A1 (fr) * 1981-09-10 1983-03-11 Honda Motor Co Ltd Moteur a combustion interne
EP0462853A1 (fr) * 1990-06-21 1991-12-27 Automobiles Peugeot Dispositif à amplitude variable pour la levée d'au moins une soupape de moteur à combustion interne
EP0505231A1 (fr) * 1991-03-19 1992-09-23 Automobiles Peugeot Commande hydraulique pour mécanisme de levée à amplitude variable d'au moins une soupape de moteur à combustion interne
US5259346A (en) * 1992-11-05 1993-11-09 Henley Manufacturing Holding Company, Inc. Rocker arm of the cam-follower type for operating two valves
DE19537641A1 (de) * 1995-10-10 1997-04-17 Bayerische Motoren Werke Ag Punktgelagerter Schwing- oder Kipphebel
DE10247949A1 (de) 2002-10-15 2004-04-29 Ina-Schaeffler Kg Schaltbares Abstützelement für einen Ventiltrieb einer Brennkraftmaschine
DE102007020108A1 (de) * 2007-04-28 2008-10-30 Schaeffler Kg Raumnockenventiltrieb mit einem Nockenfolger zur Ausführung einer Schwenk- oder Kippbewegung um eine Bewegungsachse im Zylinderkopf einer Brennkraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021073680A1 (fr) * 2019-10-16 2021-04-22 Schaeffler Technologies AG & Co. KG Crosse de type poutre destinée à un train de soupapes d'un moteur à combustion interne à usage intensif

Also Published As

Publication number Publication date
DE102009037496A1 (de) 2011-02-17
EP2295739B1 (fr) 2012-03-28
ATE551504T1 (de) 2012-04-15

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