EP0235121A1 - Internal combustion engine - Google Patents

Internal combustion engine Download PDF

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Publication number
EP0235121A1
EP0235121A1 EP87890035A EP87890035A EP0235121A1 EP 0235121 A1 EP0235121 A1 EP 0235121A1 EP 87890035 A EP87890035 A EP 87890035A EP 87890035 A EP87890035 A EP 87890035A EP 0235121 A1 EP0235121 A1 EP 0235121A1
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EP
European Patent Office
Prior art keywords
valves
combustion engine
internal combustion
camshaft
valve
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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
EP87890035A
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German (de)
French (fr)
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EP0235121B1 (en
Inventor
Hermann Weichsler
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Weichsler Hermann
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Individual
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Publication of EP0235121A1 publication Critical patent/EP0235121A1/en
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Publication of EP0235121B1 publication Critical patent/EP0235121B1/en
Expired legal-status Critical Current

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    • 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
    • F01L1/262—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 valve stems disposed radially from a centre which is substantially the centre of curvature of the upper wall surface of a combustion chamber
    • 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
    • F01L1/0532—Camshafts overhead type the cams being directly in contact with the driven valve
    • 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
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L2003/25—Valve configurations in relation to engine
    • F01L2003/256—Valve configurations in relation to engine configured other than perpendicular to camshaft axis
    • 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
    • F02B2275/18—DOHC [Double 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
    • 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
    • F02F2001/246—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis and orientated radially from the combustion chamber surface

Definitions

  • the invention relates to an internal combustion engine with at least one row of cylinders with closely spaced combustion chambers, each combustion chamber containing three valves.
  • DE-OS 3 342 115 relates to a valve actuation mechanism of a three-valve internal combustion engine, the two valves having the same function being aligned parallel to one another, so that a roof-shaped combustion chamber is created with the third valve standing at an oblique angle.
  • This combustion chamber shape is because of the. extremely off-center position of the spark plug is unfavorable, since the burning distances are of different lengths.
  • the most advantageous shape of the combustion chamber is a spherical cap, which, however, requires a radial valve arrangement in which the valve stems protrude very far from the cylinder bore, so that this system only applies to single cylinders, as disclosed in GB-PS 695 546, or in multi-cylinder in-line engines with economically far from each other removed cylinders can be applied.
  • the object of the invention is to eliminate these disadvantages and to provide an internal combustion engine with closely spaced combustion chambers and a radial valve arrangement.
  • the invention solves the problem in that the valves are arranged freely suspended, the axes of which intersect approximately at the center of the combustion chamber and, viewed in plan view, form a "Y" which is normal to the longitudinal axis of the internal combustion engine, in that the position of the valves is adjacent to one another in the combustion chambers Cylinder is rotated by 180 0 and that the shaft ends of the individual valves to the left and right of the longitudinal axis of the internal combustion engine each form a valve row, in the planes of which there is a camshaft, which the valves standing at an oblique angle to the camshaft axis via conical, acting on tappets Cam activated.
  • conical cams are cranked in their elevation region in the direction of the valve axis, and that the valve clearance of the valves which are at an angle to the longitudinal axis of the camshaft is adjusted by axially displacing the individual cams on the camshaft.
  • spark plug is arranged approximately in the middle of the combustion chamber.
  • a final feature of the invention is that each of the two valves standing at an oblique angle to the camshaft axis is assigned its own channel.
  • FIG. 1 shows a longitudinal section through the cylinder head of an in-line engine according to the invention
  • FIG. 2 shows the top view through the same cylinder head
  • FIG. 3 illustrates a cross section along line A / A of FIGS. 1 and 2.
  • the cylinder heads have a hemispherical combustion chamber 1, 2 and are each formed with three valves 3, 4, of which the two smaller take over the intake function, while the remaining one falls into the exhaust or vice versa.
  • the valve arrangement rotated by 180 ° in the adjacent combustion chamber 2, so that intake ports 7 and exhaust ports 6 alternate in the cylinder head.
  • valves are controlled by two camshafts 8 placed in the planes formed by the valve stems, which open the outlet valves 3 which are perpendicular to the camshaft axis by means of cylindrical cams 10 "acting on tappets 3", while the inlet valves 4 operate by means of conical tappets 4 " Cam 9 are operated. This makes it possible to adjust the valve clearance by axially displacing the individual cams 9 on the camshaft 8.
  • the spark plug 5 is almost in the middle of the combustion chamber 1, 2.

Abstract

1. Combustion engine with at least one series of cylinders with closely adjacent combustion chambers (1, 2) wherein each combustion chamber contains three valves (3, 4), characterized in that valves (3, 4) are arranged freely suspended, their axes intersect substantially in the centre of the combustion chamber and seen in a plan, form a "Y" located normally to the longitudinal axis of the combustion engine, that the position of the valves relative to one another in the combustion chambers (1, 2) of neighbouring cylinders (1', 2') are turned, in each case, through 180 degrees and that the shaft ends (3', 4') of the individual valves (3, 4) in each case to the left and right of the longitudinal axis of the combustion engine form a valve row, in the plane of which lies, in each case, a cam shaft (8) which actuates the valve (4) located at an oblique angle to the camshaft axis via conical cams (9) acting on cup tappets (4").

Description

Die Erfindung betrifft eine Verbrennungskraftmaschine mit wenigstens einer Zylinderreihe mit eng aneinanderliegenden Brennräumen, wobei jeder Brennraum drei Ventile enthält'.The invention relates to an internal combustion engine with at least one row of cylinders with closely spaced combustion chambers, each combustion chamber containing three valves.

Verbrennungskraftmaschinen mit drei Ventilen je Brennraum sind an sich bekannt.Internal combustion engines with three valves per combustion chamber are known per se.

Die DE-OS 3 342 115 betrifft einen Ventil-Betätigungsmechanismus einer Drei-Ventil-Brennkraftmaschine, wobei die beiden Ventile gleicher Funktion parallel zueinander ausgerichtet sind, sodaß mit dem im schrägen Winkel dazu stehenden dritten Ventil ein dachförmiger Brennraum entsteht. Diese Brennraumform ist wegen der. stark außermittigen Lage der Zündkerze ungünstig, da die Brennwege unterschiedlich lang werden. Die vorteilhafteste Brennraumform bildet eine Kugelkalotte, die jedoch eine radiale Ventilanordnung erfordert, bei der die Ventilschäfte die Zylinderbohrung sehr weit überragen, sodaß dieses System nur bei einzelstehenden Zylindern, wie in der GB-PS 695 546 geoffenbart, oder bei mehrzylindrigen Reihenmotoren mit unwirtschaftlich weit voneinander entfernten Zylindern angewandt werden kann.DE-OS 3 342 115 relates to a valve actuation mechanism of a three-valve internal combustion engine, the two valves having the same function being aligned parallel to one another, so that a roof-shaped combustion chamber is created with the third valve standing at an oblique angle. This combustion chamber shape is because of the. extremely off-center position of the spark plug is unfavorable, since the burning distances are of different lengths. The most advantageous shape of the combustion chamber is a spherical cap, which, however, requires a radial valve arrangement in which the valve stems protrude very far from the cylinder bore, so that this system only applies to single cylinders, as disclosed in GB-PS 695 546, or in multi-cylinder in-line engines with economically far from each other removed cylinders can be applied.

Aufgabe der Erfindung ist es, diese Nachteile zu beseitigen und eine Verbrennungskraftmaschine mit eng aneinanderliegenden Brennräumen und radialer Ventilanordnung zu schaffen. Die Erfindung löst die Aufgabe dadurch, daß die Ventile frei hängend angeordnet sind, deren Achsen sich in etwa der Brennraummitte schneiden und in Draufsicht betrachtet ein normal auf die Längsachse der Verbrennungskraftmaschine stehendes "Y" bilden, daß die Lage der Ventile zueinander in den Brennräumen benachbarter Zylinder jeweils um 1800 verdreht ist und daß die Schaftenden der einzelnen Ventile links und rechts der Längsachse der Verbrennungskraftmaschine je eine Ventilreihe bilden, in deren Ebenen je eine Nockenwelle liegt, welche die im schrägen Winkel zur Nockenwellenachse stehenden Ventile über konische, auf Tassenstößel wirkende Nocken betätigt.The object of the invention is to eliminate these disadvantages and to provide an internal combustion engine with closely spaced combustion chambers and a radial valve arrangement. The invention solves the problem in that the valves are arranged freely suspended, the axes of which intersect approximately at the center of the combustion chamber and, viewed in plan view, form a "Y" which is normal to the longitudinal axis of the internal combustion engine, in that the position of the valves is adjacent to one another in the combustion chambers Cylinder is rotated by 180 0 and that the shaft ends of the individual valves to the left and right of the longitudinal axis of the internal combustion engine each form a valve row, in the planes of which there is a camshaft, which the valves standing at an oblique angle to the camshaft axis via conical, acting on tappets Cam activated.

Durch diesen Wechsel der Ventilanordnung innerhalb benachbarter Brennräume wird es ermöglicht, daß die über die Zylinderbohrung hinausreichenden Ventile in den Freiraum des benachbarten Zylinders ragen.This change in the valve arrangement within adjacent combustion chambers makes it possible for the valves extending beyond the cylinder bore to protrude into the free space of the adjacent cylinder.

Ein weiteres Merkmal der Erfindung ist es, daß die konischen Nocken in ihrem Erhebungsbereich in Richtung der Ventilachse vorgekröpft sind, und daß das Ventilspiel der schräg zur Nockenwellenlängsachse stehenden Ventile durch achsiales Verschieben der einzelnen Nocken auf der Nockenwelle eingestellt wird.Another feature of the invention is that the conical cams are cranked in their elevation region in the direction of the valve axis, and that the valve clearance of the valves which are at an angle to the longitudinal axis of the camshaft is adjusted by axially displacing the individual cams on the camshaft.

Ein anderes Merkmal der Erfindung ist es, daß die Zündkerze annähernd in der Mitte des Brennraumes angeordnet ist.Another feature of the invention is that the spark plug is arranged approximately in the middle of the combustion chamber.

Ein abschließendes Merkmal der Erfindung ist es, daß jedem der beiden im schrägen Winkel zur Nockenwellenachse stehenden Ventile ein eigener Kanal zugeordnet ist.A final feature of the invention is that each of the two valves standing at an oblique angle to the camshaft axis is assigned its own channel.

Die Erfindung ist in einem Ausführungsbeispiel schematisch dargestellt. Fig. 1 zeigt einen Längsschnitt durch den erfindungsgemäßen Zylinderkopf eines Reihenmotors, Fig. 2 zeigt die Draufsicht durch denselben Zylinderkopf, Fig. 3 veranschaulicht einen Querschnitt nach Linie A/A der Fig. 1 und 2.The invention is shown schematically in one embodiment. 1 shows a longitudinal section through the cylinder head of an in-line engine according to the invention, FIG. 2 shows the top view through the same cylinder head, FIG. 3 illustrates a cross section along line A / A of FIGS. 1 and 2.

In Fig. 1 und 2 werden lediglich die bewegten Teile dargestellt, während in Fig. 3 der Zylinderkopf teilweise durchsichtig gedacht ist.1 and 2 only the moving parts are shown, while in Fig. 3 the cylinder head is partially transparent.

Die Zylinderköpfe weisen einen halbkugelförmigen Verbrennungsraum 1,2 auf und sind mit je drei Ventilen 3,4 ausgebildet, von denen die beiden kleineren die Einlaßfunktion übernehmen, während dem verbleibenden der Auspuff zufällt oder umgekehrt.The cylinder heads have a hemispherical combustion chamber 1, 2 and are each formed with three valves 3, 4, of which the two smaller take over the intake function, while the remaining one falls into the exhaust or vice versa.

Die Achsen der einzelnen Ventilschäfte 3',4' verschneiden sich in etwa der Hochachse des Zylinders 1' und bilden im Grundriß betrachtet ein "Y". Dabei überragen die beiden Einlaßventile 4 die Zylinderbohrung in Motorlängsachse. Um das Kollidieren der einzelnen Ventilfedern und Tassenstößel 411 zu verhindern, wird die Ventilanordnung im benachbarten Brennraum 2 um 180° verdreht, sodaß sich im Zylinderkopf Einlaßkanäle 7 und Auslaßkanäle 6 abwechseln.The axes of the individual valve stems 3 ', 4' intersect approximately the vertical axis of the cylinder 1 'and, viewed in plan, form a "Y". The two intake valves 4 protrude from the cylinder bore in the longitudinal axis of the engine. To prevent the individual valve springs and tappets 4 11 from colliding, the valve arrangement rotated by 180 ° in the adjacent combustion chamber 2, so that intake ports 7 and exhaust ports 6 alternate in the cylinder head.

Die Steuerung der Ventile erfolgt durch zwei in die durch die Ventilschäfte gebildeten Ebenen gelegten Nockenwellen 8, welche die senkrecht zur Nockenwellenachse stehenden Auslaßventile 3 durch zylindrische auf Tassenstößel 3" wirkende Nocken 10 öffnen, während die Einlaßventile 4 mittels konischer, ebenfalls auf Tassenstößel 4" wirkenden Nocken 9 betätigt werden. Damit wird es möglich, das Ventilspiel durch achsiales Verschieben der Einzelnocken 9 auf der Nockenwelle 8 einzustellen.The valves are controlled by two camshafts 8 placed in the planes formed by the valve stems, which open the outlet valves 3 which are perpendicular to the camshaft axis by means of cylindrical cams 10 "acting on tappets 3", while the inlet valves 4 operate by means of conical tappets 4 " Cam 9 are operated. This makes it possible to adjust the valve clearance by axially displacing the individual cams 9 on the camshaft 8.

Die Zündkerze 5 liegt bei dieser Art der Ventilanordnung nahezu in der Mitte des Brennraumes 1,2.In this type of valve arrangement, the spark plug 5 is almost in the middle of the combustion chamber 1, 2.

Claims (5)

1. Verbrennungskraftmaschine mit wenigstens einer Zylinderreihe mit eng aneinanderliegenden Brennräumen (1,2), wobei jeder Brennraum drei Ventile (3,4) enthält, dadurch gekennzeichnet, daß die Ventile (3,4) frei hängend angeordnet sind, deren Achsen sich in etwa der Brennraummitte schneiden und in Draufsicht betrachtet ein normal auf die Längsachse der Verbrennungskraftmaschine stehendes "Y" bilden, daß die Lage der Ventile zueinander in den Brennräumen (1,2) benachbarter Zylinder (1',2') jeweils um 180° verdreht ist und daß die Schaftenden (3',4') der einzelnen Ventile (3,4) links und rechts der Längsachse der Verbrennungskraftmaschine je eine Ventilreihe bilden, in deren Ebenen je eine Nockenwelle (8)'liegt, welche die im schrägen Winkel zur Nockenwellenachse stehenden Ventile (4) über konische, auf Tassenstößel (4") wirkende Nocken (9) betätigt.1. Internal combustion engine with at least one row of cylinders with closely spaced combustion chambers (1,2), each combustion chamber containing three valves (3,4), characterized in that the valves (3,4) are freely suspended, the axes of which are approximately cut the center of the combustion chamber and, viewed in plan view, form a "Y" that is normal to the longitudinal axis of the internal combustion engine, that the position of the valves relative to one another in the combustion chambers (1, 2) of adjacent cylinders (1 ', 2') is rotated by 180 ° and that the shaft ends (3 ', 4') of the individual valves (3, 4) to the left and right of the longitudinal axis of the internal combustion engine each form a valve row in the planes of which there is a camshaft (8) 'which is at an oblique angle to the camshaft axis Valves (4) are actuated via conical cams (9) acting on the tappet (4 "). 2. Verbrennungskraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die konischen Nocken (9) in ihrem Erhebungsbereich in Richtung der Ventilachse (4') vorgekröpft sind.2. Internal combustion engine according to claim 1, characterized in that the conical cams (9) are cranked in their raised area in the direction of the valve axis (4 '). 3. Verbrennungskraftmaschine nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß das Ventilspiel der schräg zur Nockenwellenlängsachse stehenden Ventile (4) durch achsiales Verschieben der einzelnen Nocken (9) auf der Nockenwelle (8) eingestellt wird.3. Internal combustion engine according to claims 1 and 2, characterized in that the valve clearance of the valves which are inclined to the longitudinal axis of the camshaft (4) is adjusted by axially displacing the individual cams (9) on the camshaft (8). 4. Verbrennungskraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Zündkerze (5) annähernd in der Mitte des Btennraumes (1,2) angeordnet ist.4. Internal combustion engine according to claim 1, characterized in that the spark plug (5) is arranged approximately in the middle of the Btennraumes (1,2). 5. Verbrennungskraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß jedem der beiden im schrägen Winkel zur Nockenwellenachse stehenden Ventile(4) ein eigener Kanal (7) zugeordnet ist.5. Internal combustion engine according to claim 1, characterized in that each of the two at an oblique angle to the camshaft axis valves (4) is assigned its own channel (7).
EP19870890035 1986-02-20 1987-02-20 Internal combustion engine Expired EP0235121B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT442/86 1986-02-20
AT44286A AT404388B (en) 1986-02-20 1986-02-20 INTERNAL COMBUSTION ENGINE

Publications (2)

Publication Number Publication Date
EP0235121A1 true EP0235121A1 (en) 1987-09-02
EP0235121B1 EP0235121B1 (en) 1989-07-05

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AT (1) AT404388B (en)
DE (1) DE3760298D1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0432950A1 (en) * 1989-12-15 1991-06-19 Ricardo Group Plc Internal combustion engines
US5111791A (en) * 1989-02-14 1992-05-12 Yamaha Hatsudoki Kabushiki Kaisha Cylinder head and valve train arrangement for multiple valve engine
EP0760058A1 (en) * 1994-05-19 1997-03-05 James J. Feuling Combustion chamber system having an improved valve arrangement
EP0894956A2 (en) * 1997-08-01 1999-02-03 C.R.F. Società Consortile per Azioni Spark-ignition internal combustion engine having a combustion chamber provided with three valves and a central spark-plug
EP0924422A3 (en) * 1997-12-18 2000-02-23 Nissan Motor Company, Limited Fuel direct injection spark ignition type internal combustion engine
DE102008019242B4 (en) * 2008-04-17 2020-06-04 Audi Ag Valve train for gas exchange valves of an internal combustion engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010026440B4 (en) 2010-07-08 2023-06-01 Kurt Imren Yapici Three-valve cylinder head for multi-cylinder engines

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Publication number Priority date Publication date Assignee Title
GB967697A (en) * 1962-08-23 1964-08-26 Vauxhall Motors Ltd Internal combustion engine valve gear
DE2139500A1 (en) * 1970-08-07 1972-02-10 Fiat Spa Piston internal combustion engine with three valves per cylinder
EP0113450A1 (en) * 1981-06-26 1984-07-18 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Cylinder head for a four-stroke internal-combustion engine
EP0155261A2 (en) * 1984-03-14 1985-09-18 Hermann Weichsler Valve timing gear for an internal-combustion engine
EP0197914A1 (en) * 1985-03-18 1986-10-15 Hermann Weichsler Valve control for internal-combustion engines

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GB695546A (en) * 1950-04-19 1953-08-12 Associated Motor Cycles Ltd Improvements relating to high performance air-cooled internal combustion engines
JPS5996406A (en) * 1982-11-24 1984-06-02 Honda Motor Co Ltd Valve gear in three-valve type internal-combustion engine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB967697A (en) * 1962-08-23 1964-08-26 Vauxhall Motors Ltd Internal combustion engine valve gear
DE2139500A1 (en) * 1970-08-07 1972-02-10 Fiat Spa Piston internal combustion engine with three valves per cylinder
EP0113450A1 (en) * 1981-06-26 1984-07-18 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Cylinder head for a four-stroke internal-combustion engine
EP0155261A2 (en) * 1984-03-14 1985-09-18 Hermann Weichsler Valve timing gear for an internal-combustion engine
EP0197914A1 (en) * 1985-03-18 1986-10-15 Hermann Weichsler Valve control for internal-combustion engines

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111791A (en) * 1989-02-14 1992-05-12 Yamaha Hatsudoki Kabushiki Kaisha Cylinder head and valve train arrangement for multiple valve engine
EP0432950A1 (en) * 1989-12-15 1991-06-19 Ricardo Group Plc Internal combustion engines
EP0760058A1 (en) * 1994-05-19 1997-03-05 James J. Feuling Combustion chamber system having an improved valve arrangement
EP0760058A4 (en) * 1994-05-19 1998-06-03 James J Feuling Combustion chamber system having an improved valve arrangement
EP0894956A2 (en) * 1997-08-01 1999-02-03 C.R.F. Società Consortile per Azioni Spark-ignition internal combustion engine having a combustion chamber provided with three valves and a central spark-plug
EP0894956A3 (en) * 1997-08-01 1999-11-03 C.R.F. Società Consortile per Azioni Spark-ignition internal combustion engine having a combustion chamber provided with three valves and a central spark-plug
EP0924422A3 (en) * 1997-12-18 2000-02-23 Nissan Motor Company, Limited Fuel direct injection spark ignition type internal combustion engine
US6196185B1 (en) 1997-12-18 2001-03-06 Nissan Motor Co., Ltd. Fuel direct injection spark ignition type internal combustion engine
EP1464820A2 (en) * 1997-12-18 2004-10-06 Nissan Motor Company, Limited Fuel direct injection spark ignition type internal combustion engine
EP1464820A3 (en) * 1997-12-18 2004-11-03 Nissan Motor Company, Limited Fuel direct injection spark ignition type internal combustion engine
DE102008019242B4 (en) * 2008-04-17 2020-06-04 Audi Ag Valve train for gas exchange valves of an internal combustion engine

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EP0235121B1 (en) 1989-07-05
DE3760298D1 (en) 1989-08-10
AT404388B (en) 1998-11-25
ATA44286A (en) 1998-03-15

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