EP0655102B1 - Commande pour au moins deux soupapes de moteur actionnables simultanement - Google Patents

Commande pour au moins deux soupapes de moteur actionnables simultanement Download PDF

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Publication number
EP0655102B1
EP0655102B1 EP93915647A EP93915647A EP0655102B1 EP 0655102 B1 EP0655102 B1 EP 0655102B1 EP 93915647 A EP93915647 A EP 93915647A EP 93915647 A EP93915647 A EP 93915647A EP 0655102 B1 EP0655102 B1 EP 0655102B1
Authority
EP
European Patent Office
Prior art keywords
valve
tappets
crossbar
cam
valves
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
EP93915647A
Other languages
German (de)
English (en)
Other versions
EP0655102A1 (fr
Inventor
Dieter Reitz
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.)
Adam Opel GmbH
Stellantis Espana SL
Original Assignee
Adam Opel GmbH
General Motors Espana SL
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 Adam Opel GmbH, General Motors Espana SL filed Critical Adam Opel GmbH
Publication of EP0655102A1 publication Critical patent/EP0655102A1/fr
Application granted granted Critical
Publication of EP0655102B1 publication Critical patent/EP0655102B1/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
    • 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
    • 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
    • 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
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis

Definitions

  • the invention relates to a valve train for at least two simultaneously actuable lift valves for the charge change of an internal combustion engine, in which each lift valve of the valve group to be operated simultaneously has its own bucket tappet and its own valve spring and on the bottoms of these bucket tappets there is a common crossbeam secured against displacement whose surface facing away from the tappets acts on a cam of a camshaft.
  • Such a valve train is described with FR-A-26 57 669.
  • the crossbar is provided with pin-like projections which engage in central recesses on the bottom of the cup tappet and thus secure the crossbar against lateral displacement by the control cam.
  • Such an embodiment requires a reinforced base on the tappets, so that their weight is increased disadvantageously. Standardized bucket tappets with a flat bottom cannot be used for this.
  • DE 40 39 075 describes a valve train in which a common tappet guided in the cylinder head is provided for the valves to be operated together and which contains a valve clearance compensation element for each of the valves assigned to it.
  • the valve clearance compensation elements are hydraulically connected to each other by bores and are supplied by a central pressure medium chamber.
  • Such a cup tappet which extends over several valves, is very expensive to manufacture. Ready-made parts cannot be used.
  • Such a tappet cannot be provided with a circular guide for reasons of space. Rather, an oval shape of the guide has to be used, which makes both the manufacture of the cylinder head and that of the valve lifter more expensive.
  • valve train in which a common yoke-like valve tappet is proposed for the purpose of reducing the dimensions for several valves, which is acted upon by a return spring common to the valves surrounding their stems, is described in DE-OS 33 44 324.
  • a special bolt is provided in the cylinder head.
  • special manufacturing expenses are required for both the valve lifter and the cylinder head.
  • standardized tappets cannot be used, so that the manufacturing effort of such a valve train is very expensive.
  • the common valve spring for several valves also blocks the space that z. B. in a diesel engine with direct injection for the injector is required, ie that this valve train is not applicable to every type of engine.
  • the invention has for its object to provide a valve train of the type described above, in which largely standardized components can be used, which leaves sufficient space for an injection nozzle or the like to be arranged centrally to the cylinder and which requires less weight of the moving masses compared to known designs .
  • this object is achieved in that the crossbeam rests with flat support surfaces on the flat bottoms of the cup tappets and engages with a contour which rises from the plane of the support surfaces between the outer peripheries of the cup tappets.
  • the control cam can act directly on the crossbeam by placing the camshaft above the lift valves; However, it can also act on the crossbar with the interposition of a rocker arm if the camshaft is located to the side of the Lift valves is arranged.
  • valve train according to the invention is also very economical to manufacture.
  • a cylinder head 1 of an internal combustion engine is placed on a cylinder block, not shown, in which reciprocating pistons 2 slide within cylinders and seal a working space of different volumes.
  • Gas exchange ducts lead to the work area, namely inlet ducts 3, 4 and exhaust ducts (not shown).
  • the inlet channels 3, 4 are closed or released by two lift valves 5, 6.
  • the exhaust gas duct, not shown, is also controlled by two lift valves.
  • Each of the lift valves 5, 6 is assigned a bucket tappet 7, 8 or 7 ', 8', in which, in a manner known per se, a hydraulically acting compensating element 9, 10 is provided to compensate for the valve clearance.
  • the compensating elements 9, 10 are supplied from an oil channel 11 in the cylinder head 1 through holes 12, 13 oil.
  • the control cam 18, 18 'of the camshaft 19 runs onto the surface 17 of the crossbar 14.
  • the crossbar 14 transmits the movement taken over by the control cams 18, 18 'to the tappets 7, 8 and 7', 8 ', of which they are transmitted to the lift valves 5, 6 in a manner known per se via the compensating elements 9, 10.
  • the crossbeams 14 remain with their contact surfaces 15 in full contact on the flat bottoms of the tappets 7, 8 and 7 ', 8'. A tilting of the crossbeams 14, as indicated in FIG.
  • the invention can also be used in internal combustion engines with three valves per cylinder, by z. B. only for two intake valves a crossbar is provided while the exhaust valve is acted upon directly by the cam in the usual manner.
  • the invention can also be used for internal combustion engines with more than four valves per cylinder, in that a crossbar is then placed over a group of three or more tappets and associated valves and this is acted upon by a cam.
  • the action of the cam on the crossbeam can also take place via a rocker arm, so that the camshaft can be arranged laterally next to the lift valves.

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)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Vehicle Body Suspensions (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (3)

  1. Commande pour au moins deux soupapes actionnées simultanément, dans laquelle un poussoir à coupelle (7, 8; 7', 8') propre et un ressort (20, 21) de soupape propre sont associés à chaque soupape (5, 6) du groupe de soupapes à actionner simultanément et dans laquelle un pontet (14) commun qui est immobilisé en translation repose sur le fond des poussoirs à coupelle (7, 8; 7', 8') et est sollicité, au niveau de sa face (17) éloignée des poussoirs à coupelle (7, 8; 7', 8'), entre les axes des soupapes, par une came de commande (18, 18') d'un arbre à cames (19), caractérisée par le fait que le pontet (14) repose par des surfaces d'appui (15) planes sur le fond plan des poussoirs à coupelle (7, 8; 7', 8') et pénètre par un profil (16) en saillie par rapport au plan des surfaces d'appui (15) entre les surfaces périphériques des poussoirs (7, 8; 7', 8').
  2. Commande de soupape selon la revendication 1, caractérisée par le fait que la came de commande (18, 18') agit directement sur le pontet (14).
  3. Commande de soupape selon la revendication 1, caractérisée par le fait que la came de commande (18, 18') agit sur le pontet (14) par l'intermédiaire d'un culbuteur.
EP93915647A 1992-08-13 1993-07-21 Commande pour au moins deux soupapes de moteur actionnables simultanement Expired - Lifetime EP0655102B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4226760 1992-08-13
DE4226760A DE4226760A1 (de) 1992-08-13 1992-08-13 Ventiltrieb für zumindest zwei gleichzeitig betätigbare Hubventile
PCT/DE1993/000640 WO1994004797A1 (fr) 1992-08-13 1993-07-21 Commande pour au moins deux soupapes de moteur actionnables simultanement

Publications (2)

Publication Number Publication Date
EP0655102A1 EP0655102A1 (fr) 1995-05-31
EP0655102B1 true EP0655102B1 (fr) 1996-02-14

Family

ID=6465444

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93915647A Expired - Lifetime EP0655102B1 (fr) 1992-08-13 1993-07-21 Commande pour au moins deux soupapes de moteur actionnables simultanement

Country Status (14)

Country Link
US (1) US5337712A (fr)
EP (1) EP0655102B1 (fr)
JP (1) JPH08500169A (fr)
KR (1) KR100235781B1 (fr)
CN (1) CN1039049C (fr)
AT (1) ATE134249T1 (fr)
AU (1) AU670111B2 (fr)
CA (1) CA2103754A1 (fr)
CZ (1) CZ282778B6 (fr)
DE (2) DE4226760A1 (fr)
ES (1) ES2085789T3 (fr)
PL (1) PL170986B1 (fr)
RU (1) RU2091593C1 (fr)
WO (1) WO1994004797A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4406407A1 (de) * 1994-02-28 1995-08-31 Schaeffler Waelzlager Kg Verfahren zur spanlosen Herstellung eines mechanischen Ventilstößels
DE4410122C2 (de) * 1994-03-24 2003-05-08 Ina Schaeffler Kg Verbindung einer Führungsschiene einer Ventilbetätigungseinrichtung mit einem Nockenwellenlager
DE4415270A1 (de) * 1994-04-30 1995-11-02 Opel Adam Ag Einrichtung zur gleichzeitigen Betätigung zweier Gaswechselventile einer Brennkraftmaschine
EP0867601B1 (fr) * 1997-03-27 2003-01-22 Toyota Jidosha Kabushiki Kaisha Dispositif de commande de soupape pour moteur à combustion interne
US5868174A (en) * 1997-07-28 1999-02-09 Earth Resources Corporation System for accessing and extracting contents from a container within a sealable recovery vessel
SE0003443L (sv) * 2000-09-27 2002-03-28 Alvar Engine Ab Anordning vid en förbränningsmotor
US7878166B2 (en) * 2007-11-29 2011-02-01 Perkins Engines Company Limited Device and method for retaining a valve bridge
CN102080584B (zh) * 2010-12-29 2012-11-21 潍柴动力扬州柴油机有限责任公司 发动机及其气门驱动机构
GB2578338B (en) * 2019-03-07 2020-12-09 Cox Powertrain Ltd Marine outboard motor with valve train having adjustable lash

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1639874A (en) * 1927-08-23 of detroit
US1693874A (en) * 1926-05-22 1928-12-04 Sirot Charles Robert Tipping device for wagons
US1693974A (en) * 1927-05-20 1928-12-04 Anna E Bienstock Attachment for cooking utensils
US3963004A (en) * 1975-05-08 1976-06-15 General Motors Corporation Two-piece valve bridge
US4658780A (en) * 1981-05-08 1987-04-21 Yamaha Hatsudoki Kabushiki Kaisha Four cycle internal combustion engine
DE3344324A1 (de) * 1983-12-08 1985-06-13 Volkswagenwerk Ag, 3180 Wolfsburg Ventiltrieb fuer zumindest zwei gleichzeitig betaetigbare ventile einer brennkraftmaschine
DE3624108A1 (de) * 1986-07-17 1988-01-28 Opel Adam Ag Ventiltrieb fuer zumindest zwei gleichzeitig zu betaetigende ventile
US4922867A (en) * 1989-08-30 1990-05-08 Cummins Engine Company, Inc. Valve stop mechanism for internal combustion engines
FR2657669A1 (fr) * 1990-01-30 1991-08-02 Peugeot Dispositif pour l'actionnement simultane d'au moins deux soupapes voisines.
DE4039075C2 (de) * 1990-10-01 2001-11-29 Volkswagen Ag Ventiltrieb für zumindest zwei gleichzeitig betätigbare Hubventile
IT1241310B (it) * 1990-10-30 1994-01-10 Ferrari Spa Sistema di distribuzione per un motore endotermico
DE4039256C2 (de) * 1990-12-08 1996-05-09 Schaeffler Waelzlager Kg Einrichtung zur gleichzeitigen Betätigung zweier Gaswechselventile einer Brennkraftmaschine

Also Published As

Publication number Publication date
US5337712A (en) 1994-08-16
RU2091593C1 (ru) 1997-09-27
CN1083565A (zh) 1994-03-09
KR100235781B1 (ko) 1999-12-15
PL170986B1 (pl) 1997-02-28
DE59301651D1 (de) 1996-03-28
WO1994004797A1 (fr) 1994-03-03
CZ32895A3 (en) 1995-09-13
CA2103754A1 (fr) 1994-02-14
KR950702668A (ko) 1995-07-29
ES2085789T3 (es) 1996-06-01
RU95106597A (ru) 1997-01-20
EP0655102A1 (fr) 1995-05-31
CZ282778B6 (cs) 1997-10-15
CN1039049C (zh) 1998-07-08
ATE134249T1 (de) 1996-02-15
AU670111B2 (en) 1996-07-04
DE4226760A1 (de) 1994-02-17
AU4557893A (en) 1994-03-15
JPH08500169A (ja) 1996-01-09
PL306091A1 (en) 1995-03-06

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