EP0194922B1 - Ventilgetriebe für eine Brennkraftmaschine mit V-artig dargelegten Ventilen und eine zentral positionierte Zündkerze - Google Patents

Ventilgetriebe für eine Brennkraftmaschine mit V-artig dargelegten Ventilen und eine zentral positionierte Zündkerze Download PDF

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Publication number
EP0194922B1
EP0194922B1 EP86400443A EP86400443A EP0194922B1 EP 0194922 B1 EP0194922 B1 EP 0194922B1 EP 86400443 A EP86400443 A EP 86400443A EP 86400443 A EP86400443 A EP 86400443A EP 0194922 B1 EP0194922 B1 EP 0194922B1
Authority
EP
European Patent Office
Prior art keywords
valves
spark plug
cylinder
rockers
camshaft
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
Application number
EP86400443A
Other languages
English (en)
French (fr)
Other versions
EP0194922A1 (de
Inventor
Jean-Claude Gallot
Pierre Lauvin
Roger Lombard
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0194922A1 publication Critical patent/EP0194922A1/de
Application granted granted Critical
Publication of EP0194922B1 publication Critical patent/EP0194922B1/de
Expired 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
    • F01L1/26—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
    • 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
    • F01L1/255—Hydraulic tappets between cam and rocker arm
    • 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
    • F02F1/242—Arrangement of spark plugs or injectors
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into 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
    • F02B2275/20—SOHC [Single overhead camshaft]
    • 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
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Definitions

  • the invention relates to devices which equip certain cylinder heads of internal combustion engines and which actuate, for each combustion chamber associated with an engine cylinder, two intake valves and two exhaust valves arranged in a V, this is ie inclined in pairs on either side of an axial plane of the cylinder, by means of a camshaft at the central head and at least two rocker arms.
  • a spark plug being arranged, for each cylinder, so that its electrodes are located in the combustion chamber, in the vicinity of the axis of the cylinder, therefore between the four valves, the spark plug is necessarily inclined, as well as a tubular well ensuring its access, so as to pass near the camshaft without touching it. This well is therefore located between two of the four valves and between the two corresponding rocker arms.
  • EP-A-0 141 527 published after the priority date of the present application, describes a device where the two pairs of valves form a V (or dihedron) in which two axes of rocker arms are located above a camshaft, parallel to this one. But to be actuated directly by the cams, the rocker arms are necessarily close to the camshaft and relatively not far from the combustion chamber, which implies a relatively wide opening angle of the V.
  • the object of the invention is to produce, in an engine with four V-inclined valves and a central spark plug per cylinder, a relatively compact and particularly reliable valve actuation device, possibly fitted with a means of compensating for backlash attenuating. its operating noise.
  • the device according to the invention equips a cylinder head in which each combustion chamber is associated with two pairs of valves respectively inclined on either side of an axial plane of the corresponding cylinder, while a spark plug well is disposed between the two valves of one of the two pairs, roughly parallel to these two valves.
  • the device comprises, for actuating the valves, a central camshaft situated in the vicinity of said axial plane and, for each cylinder, at least two rocker arms which are further from the combustion chamber than the camshaft and which tilt respectively on two axes parallel to the camshaft located on either side of said axial plane.
  • each rocker arm and the camshaft is interposed a plunger substantially parallel to the cylinder, and for each cylinder, the rocker arm axis disposed on the same side as the spark plug well is carried, like the other axis , by two bearings located on either side of the rocker arms and is disposed between the well and said axial plane.
  • the device illustrated in the drawings comprises, in a cylinder head 1 of an internal combustion engine, a combustion chamber 2 at the top of which is screwed a spark plug 3 engaged in an inclined tubular well 4 passing through a cover 5 shown only at Figure 1.
  • This chamber 2 faces a cylinder 6 of the engine, and there open two intake ducts 7 and two exhaust ducts 8 closable by valves 9, 10 and 11, 12 arranged in V, it is that is to say inclined in pairs on either side of a plane PP passing through the axis of the cylinder 6.
  • the electrodes of the spark plug 3 are located approximately in the axis of the cylinder 6 and surrounded by the four valves 9 -12.
  • the well 4 is located between the two intake valves 9, 10 and approximately parallel to them.
  • the valves 9-12 are actuated by a device comprising a central camshaft 13 whose axis is substantially perpendicular to that of the cylinder 6 and located in the plane PP, and several rockers 14, 15 or 16, 17 each carried by the 'one of two axes 18, 19 parallel to the camshaft.
  • the rocker arms 14-17 are further from the chamber 2 than the camshaft 13 and are connected to the latter each by one of. several pushers 20, 21, 22 or 23, 24 parallel to the cylinder 6 and aligned in the vicinity of the plane PP.
  • the two axes 18, 19 are each carried by two bearings 25, 26 or 27, 28 fixed to the cylinder head 1 on either side of the rocker arms 14-17, and are each located between the plane PP and one of the pairs valves 9, 10 or 11, 12.
  • the axis 18 located on the side of the spark plug well 4 passes by without touching it.
  • each intake valve 9, 10 is actuated by one of two rockers 14 rocking on the axis 18 on either side of the well 4 and cooperating respectively with one of two pushers 20, 22, while the two exhaust valves 11, 12 are actuated by a double rocker arm 15 rocking on the axis 19 and cooperating with a pusher 21.
  • the three plungers 20, 21, 22, aligned in line with the plane PP slide in a bar 29 constituting the aforementioned guide and forming a body with the bearings 25, 26. In the case of an engine with several cylinders aligned parallel to the camshaft 13, this bar 29 is extended by one end 29a beyond at least one of the bearings 25, 26.
  • each pair of valves 9-10, 11-12 is actuated by one of the two double rocker arms 16, 17 rocking respectively on one of the two axes 18, 19 and respectively cooperating with one of the two parallel pushers 23, 24.
  • the guide 30 of each of these forms one body with only one of the bearings 27, 28, a bearing such as 28 possibly comprising two guides 30, 30a for two pushers 24, 24a cooperating respectively with rocker arms associated with two neighboring cylinders.
  • the fork formed by the double rocker arm 16 overlaps the well 4.
  • the installation of the device in the cylinder head 1 is relatively compact for an engine with four valves per cylinder and with central spark plug, and thanks to the location of the rocker shafts inside the V formed by the valves 9-12 and by the spark plug well 4, in the part of this V sufficiently distant from the combustion chamber 2, therefore sufficiently wide, the axis located on the side of the spark plug well 4 does not interfere with that -this and can therefore be carried rigidly by two bearings.
  • the presence of the pushers 20-22 between the camshaft 18 and the rocker arms 14-17 makes it possible to accommodate in this V-shaped space an automatic device for adjusting the operating clearance of the valves by incorporating in each pushrod a means of 'known telescopic hydraulic damping.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (5)

1. Ventilbetätigungsvorrichtung in einem Verbrennungsmotor mit vier V-förmig geneigten Ventilen (9, 10, 11, 12) und einer zentralen Zündkerze (3) pro Zylinder (6), wobei jedem Zylinder (6) zwei Paare von Ventilen (9, 10 ; 11, 12) zugeordnet sind, die beiderseits einer Axialebene (P-P) des entsprechenden Zylinders (6) geneigt sind, während ein Zündkerzenschacht (4) zwischen den beiden Ventilen (9, 10) des einen der Paare ungefähr parallel zu jenen ausgebildet ist, wobei die Vorrichtung eine zentrale Nockenwelle (13), die im Bereich der Axialebene (P-P) angeordnet ist, und für jeden Zylinder (6) mindestens zwei Kipphebel (16, 17 ; 14, 15) aufweist, welche von der Brennkammer (2) weiter entfernt sind als die Nockenwelle (13) und welche auf zur Nockenwelle parallelen und beiderseits der Axialebene (P-P) liegenden zwei Achsen (18, 19) kippen, dadurch gekennzeichnet, daß zwischen jedem Kipphebel . (14, 15 ; 16, 17) und der Nockenwelle (13) in an sich bekannter Weise ein im wesentlichen zum Zylinder (6) paralleler Stößel (20-22 ; 23, 24) zwischengesetzt ist, und daß für jeden Zylinder die auf der gleichen Seite wie der Zündkerzenschacht (4) angeordnete Achse (18) des (der) Kipphebel (s), wie die andere Achse (19), von zwei Lagern (25, 26 ; 27, 28) gehalten wird, die beiderseits der Kipphebel (14, 15 ; 16, 17) liegen, und zwischen dem Schacht (4) und der Axialebene (P-P) angeordnet ist.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die beiden zum Zündkerzenschacht (4) benachbarten Ventile (9, 10) durch zwei Kipphebel (14) betätigt werden, die auf der selben Achse (18) kippen, während das andere Paar von Ventilen (11, 12) durch einen Doppelkipphebel (15) betätigt wird, der auf der zweiten Achse (19) kippt, und daß die drei Kipphebel (14, 15) mit jeweils einem von drei parallelen und ausgerichteten Stößeln (20, 22, 21) zusammenwirken.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jedes Paar von Ventilen (9, 10, 11, 12) durch einen von zwei Doppelkipphebeln (16, 17) betätigt wird, welche jeweils auf einer der beiden Achsen (18, 19) kippen und jeweils mit einem von zwei parallelen Stößeln (23, 24) zusammenwirken, wobei der eine der beiden Kipphebel (16) den Zündkerzenschacht (4) überlappt.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die im Bereich der Axialebene (P-P) liegenden Stößel (20, 21, 22 ; 23, 24, 24a) jeweils in einer Führung (29 ; 30, 30a) gleiten, welche mit wenigstens einem der beiden die Achse (18,19) des entsprechenden Kipphebels (14, 15 ; 16, 17) tragenden Lager (25, 26 ; 27, 28) einstückig ist.
5. Vorrichtung nach irgendeinem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Stößel (20-22, 23, 24, 24a) jeweils eine hydraulische Nachstellvorrichtung aufweisen.
EP86400443A 1985-03-13 1986-03-04 Ventilgetriebe für eine Brennkraftmaschine mit V-artig dargelegten Ventilen und eine zentral positionierte Zündkerze Expired EP0194922B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8503709 1985-03-13
FR8503709A FR2578907B1 (fr) 1985-03-13 1985-03-13 Dispositif d'actionnement de soupapes dans un moteur a combustion interne comportant quatre soupapes inclinees en v et une bougie centrale par cylindre

Publications (2)

Publication Number Publication Date
EP0194922A1 EP0194922A1 (de) 1986-09-17
EP0194922B1 true EP0194922B1 (de) 1988-06-15

Family

ID=9317158

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86400443A Expired EP0194922B1 (de) 1985-03-13 1986-03-04 Ventilgetriebe für eine Brennkraftmaschine mit V-artig dargelegten Ventilen und eine zentral positionierte Zündkerze

Country Status (5)

Country Link
US (1) US4671222A (de)
EP (1) EP0194922B1 (de)
JP (1) JPS61210207A (de)
DE (1) DE3660315D1 (de)
FR (1) FR2578907B1 (de)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61275545A (ja) * 1985-05-29 1986-12-05 Daihatsu Motor Co Ltd 内燃機関における動弁装置
JPH0668256B2 (ja) * 1986-07-09 1994-08-31 本田技研工業株式会社 Ｓｏｈｃ型内燃機関
JPH0668254B2 (ja) * 1986-07-09 1994-08-31 本田技研工業株式会社 Ｓｏｈｃ型内燃機関
US4741301A (en) * 1986-11-28 1988-05-03 General Motors Corporation Engine valve train with inner and outer cam followers
JP2694899B2 (ja) * 1988-05-30 1997-12-24 ヤマハ発動機株式会社 ４サイクルエンジンの動弁装置
US5070824A (en) * 1988-05-30 1991-12-10 Yamaha Hatsudoki Kabushiki Kaisha Combustion chamber and valve operating mechanism for multi-valve engine
JPH02149769A (ja) * 1988-11-30 1990-06-08 Fuji Heavy Ind Ltd ４バルブ式エンジン燃焼室の点火プラグ配列装置
JP2741691B2 (ja) * 1989-04-28 1998-04-22 スズキ株式会社 内燃機関の動弁機構
FR2662471B1 (fr) * 1990-05-23 1992-09-25 Peugeot Procede de realisation de puits de bougie dans une culasse d'un moteur a combustion interne et ensemble d'elements destine a former au moins un tel puits de bougie.
DE69005276T2 (de) * 1989-12-15 1994-07-21 Citroen Sa(Automobiles) Verfahren zur Herstellung einer Zündkerzöffnung in einem Zylinderkopf einer Brennkraftmaschine.
JPH0811930B2 (ja) * 1990-04-13 1996-02-07 本田技研工業株式会社 Ｓｏｈｃ型多気筒内燃機関
JP2849939B2 (ja) * 1990-05-07 1999-01-27 本田技研工業株式会社 Ｓｏｈｃ型内燃機関
US5445118A (en) * 1994-04-22 1995-08-29 Brunswick Corporation Valve train assembly for internal combustion engine
US5560331A (en) * 1994-05-10 1996-10-01 Yamaha Hatsudoki Kabushiki Kaisha Cylinder head for engine
US5636600A (en) * 1995-10-31 1997-06-10 Cummins Engine Company, Inc. Rocker lever assembly for internal combustion engine
AT410242B (de) * 1997-04-09 2003-03-25 Avl List Gmbh Mehrzylinder-brennkraftmaschine mit zwei einlass- und zwei auslassventilen
DE19745715A1 (de) * 1997-10-16 1999-04-22 Daimler Chrysler Ag Vorrichtung zur variablen Steuerung der Ventile einer Brennkraftmaschine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2016084A (en) * 1978-03-03 1979-09-19 Daimler Benz Ag Cylinder head for a micture-compressing internalcombustion engine
EP0141527A2 (de) * 1983-10-22 1985-05-15 Gaydon Technology Limited Zylinderkopf für eine funkgezündete Brennkraftmaschine

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US1382953A (en) * 1921-06-28 church
FR504380A (fr) * 1918-05-16 1920-07-02 Rolls Royce Perfectionnements aux mécanismes à soupapes pour moteurs à combustion interne
US1500619A (en) * 1920-01-22 1924-07-08 Packard Motor Car Co Hydrocarbon motor
US1406271A (en) * 1921-01-17 1922-02-14 Henry C Michelsen Internal-combustion engine
US2944536A (en) * 1958-05-30 1960-07-12 Austin Motor Co Ltd Overhead valve internal combustion engines
US3045657A (en) * 1959-07-22 1962-07-24 Thompson Ramo Wooldridge Inc Valve operating means
FR1535881A (fr) * 1967-08-18 1968-08-09 Daimler Benz Ag Distribution pour moteur à combustion interne à pistons
US3661127A (en) * 1970-05-07 1972-05-09 Johnson Products Inc Hydraulic tappet with swivelably mounted pushrod
JPS5543228A (en) * 1978-09-21 1980-03-27 Yamaha Motor Co Ltd Overhead cam-shaft engine
US4505236A (en) * 1982-06-01 1985-03-19 Nissan Motor Company, Limited Valve operating arrangement of an internal combustion engine
US4556025A (en) * 1983-11-18 1985-12-03 Mazda Motor Corporation Engine valve mechanism having valve disabling device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2016084A (en) * 1978-03-03 1979-09-19 Daimler Benz Ag Cylinder head for a micture-compressing internalcombustion engine
EP0141527A2 (de) * 1983-10-22 1985-05-15 Gaydon Technology Limited Zylinderkopf für eine funkgezündete Brennkraftmaschine

Also Published As

Publication number Publication date
US4671222A (en) 1987-06-09
FR2578907B1 (fr) 1989-06-16
FR2578907A1 (fr) 1986-09-19
JPS61210207A (ja) 1986-09-18
DE3660315D1 (en) 1988-07-21
EP0194922A1 (de) 1986-09-17

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