EP0113450A1 - Cylinder head for a four-stroke internal-combustion engine - Google Patents

Cylinder head for a four-stroke internal-combustion engine Download PDF

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Publication number
EP0113450A1
EP0113450A1 EP83112438A EP83112438A EP0113450A1 EP 0113450 A1 EP0113450 A1 EP 0113450A1 EP 83112438 A EP83112438 A EP 83112438A EP 83112438 A EP83112438 A EP 83112438A EP 0113450 A1 EP0113450 A1 EP 0113450A1
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EP
European Patent Office
Prior art keywords
cylinder
inlet valves
valve
spark plug
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.)
Granted
Application number
EP83112438A
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German (de)
French (fr)
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EP0113450B1 (en
Inventor
Jiri Dipl.-Ing. Seidl
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication of EP0113450A1 publication Critical patent/EP0113450A1/en
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Publication of EP0113450B1 publication Critical patent/EP0113450B1/en
Expired legal-status Critical Current

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    • 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
    • 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
    • F01L1/022—Chain drive
    • 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
    • F01L1/024—Belt drive
    • 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
    • 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
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/24—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type
    • F02B75/243—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type with only one crankshaft of the "boxer" type, e.g. all connecting rods attached to separate crankshaft bearings
    • 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
    • F01L2001/0535—Single overhead camshafts [SOHC]
    • 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
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1808—Number of cylinders two
    • 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
    • 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

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)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

Ein Zylinderkopf (1) für Viertakt-Brennkraftmaschinen enthält in V-Stellung hängend zwei Einlaßventile (2) und ein Auslaßventil 3. Die beiden parallelen Einlaßventile (2) weisen einen relative großen freien Abstand voneinander auf in dem eine Zündkerze (8) mit größerem Winkel zur Zylinderachse (4) als die beiden Einlaßventile (2) angeordnet ist. Die Funkenstrecke der Zündkerze (8) liegt im Brennraum mittig zwischen den Ventiltellern (2') der Einlaßventile (2). In der gleichen Ebene mit der Zündkerze (8) ist das Auslaßventil (3) angeordnet, dessen Ventilteller (3') einen Durchmesser etwa gleich dem Radius der Kreis-Kontur (10') des Zylinders (10) aufweist und die Kreis-Kontur (10') und die Zylinderachse (4) etwa tangiert. Die Ventilteller (2') der Einlaßventile (2) sind in ihrer Schließlage so angeordnet daß sie die Kreis-Kontur (10') des Zylinders (10) etwa tangieren und diejenige Achse (10") der Kreis-Kontur (10') übergreifen, die parallel zu der von den Einlaßventilen (2) bestimmten Ebene liegt.A cylinder head (1) for four-stroke internal combustion engines contains two intake valves (2) and an exhaust valve 3 hanging in the V position. The two parallel intake valves (2) have a relatively large free distance from one another in which a spark plug (8) with a larger angle to the cylinder axis (4) as the two inlet valves (2) is arranged. The spark gap of the spark plug (8) lies in the center of the combustion chamber between the valve disks (2 ') of the inlet valves (2). The outlet valve (3) is arranged in the same plane with the spark plug (8), the valve disc (3 ') of which has a diameter approximately equal to the radius of the circular contour (10') of the cylinder (10) and the circular contour ( 10 ') and the cylinder axis (4) approximately tangent. The valve disc (2 ') of the inlet valves (2) are arranged in their closed position so that they approximately affect the circular contour (10') of the cylinder (10) and overlap that axis (10 ") of the circular contour (10 ') which is parallel to the plane determined by the inlet valves (2).

Description

Die Erfindung bezieht sich auf einen Zylinderkopf einer Bauart gemäß den im Oberbegriff des Patentanspruches angegebenen Merkmalen.The invention relates to a cylinder head of a type according to the features specified in the preamble of the claim.

Bekannte Zylinderköpfe dieser Bauart gemäß DE-C 755 495 und DE-Z Motorrad, Heft 24/1980, S. 28 und 30 weisen eine ungünstige Anordnung der Ventile und der Zündkerze in Bezug auf die Brennraumgestaltung auf, wodurch einerseits die Fläche des Brennraums für eine Abstimmung zwischen Ventilgröße und Quetschspaltgröße ungenügend genutzt und andererseits eine dezentrale Ladungszündung mit nachteiligem Einfluß auf den Verbrennungsvorgang gegeben sind.Known cylinder heads of this type according to DE-C 755 495 and DE-Z motorcycle, issue 24/1980, pp 28 and 30 have an unfavorable arrangement of the valves and the spark plug in relation to the combustion chamber design, which on the one hand, the area of the combustion chamber for a Coordination between valve size and pinch gap size is insufficiently used and on the other hand there is a decentralized charge ignition with an adverse influence on the combustion process.

Die Erfindung vermeidet diese Nachteile durch die Merkmale gemäß dem Kennzeichen des Patentanspruches. Die dabei gegebene Ventil- und Zündkerzen-Anordnung ermöglicht große Ventilöffnungsquerschnitte bei kleinem V-Winkel der Ventile und damit kompakter Brennraumgestaltung einschließlich nahezu zentraler Ladungszündung sowie günstiger Beeinflussungsmöglichkeit des Verbrennungsvorganges durch eine von der Einlaßventil-Anordnung begünstigte Ausbildung und Anordnung eines abgestimmten Quetschspaltes. Die Winkellage der Zündkerzen-Längsachse ergibt darüber hinaus sowohl einen geringen Einbau-Raumbedarf der Zündkerze zwischen den Einlaßventilen unabhängig vom Raumbedarf für deren Ventilfedern als auch eine freie Zugänglichkeit zu den Zündkerzen auf der relativ kalten Einlaß-Außenseite des Zylinderkopfes.The invention avoids these disadvantages by the features according to the characterizing part of the patent claim. The given valve and spark plug arrangement enables large valve opening cross-sections with a small V-angle of the valves and thus a compact combustion chamber design including almost central charge ignition as well as the possibility of influencing the combustion process favorably through a design and arrangement of a coordinated pinch gap favored by the intake valve arrangement. The angular position of the spark plug longitudinal axis also results in both a small installation space requirement of the spark plug between the inlet valves regardless of the space requirement for their valve springs and free accessibility to the Spark plugs on the relatively cold inlet outside of the cylinder head.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen:

  • Fig. 1 einen Zylinderkopf für Viertakt-Brennkraftmaschinen im Schnitt und
  • Fig. 2 die Innenansicht des Brennraumes im Zylinderkopf gemäß der Linie II-II in Fig. 1.
In the drawing, an embodiment of the invention is shown. Show it:
  • Fig. 1 shows a cylinder head for four-stroke internal combustion engines in section and
  • 2 shows the interior view of the combustion chamber in the cylinder head along the line II-II in FIG. 1.

Ein Zylinderkopf 1 für fremdgezündete Viertakt-Brennkraftmaschinen enthält drei Ventile 2 und 3 in V-Stellung zueinander. Zwei Einlaßventile 2 liegen parallel zueinander entsprechend einem V-Schenkel, der von der Ebene der beiden Einlaßventile 2 bestimmt ist. Zur Zylinderachse 4 weisen die Einlaßventile 2 einen Kinkel von ca. 37 auf. Der von einem Auslaßventil 3 bestimmte V-Schenkel weist dagegen nur einen Winkel von ca. 15° zur Zylinderachse 4 auf. Eine Nockenwelle 5 ist in einer winkelhalbierenden Lage innerhalb der ca. 52°-V-Stellung der Einlaß- und Auslaßventile 2 und 3 angeordnet. Für die Antriebsverbindung zwischen der Nockenwelle 5 und den Ein- und Auslaßventilen 2 und 3 ist je ein Kipphebel 6 auf Lagerachsen 7 drehbeweglich angeordnet.A cylinder head 1 for spark-ignited four-stroke internal combustion engines contains three valves 2 and 3 in a V position with respect to one another. Two intake valves 2 are parallel to each other corresponding to a V-leg, which is determined by the plane of the two intake valves 2. The inlet valves 2 have an angle of approximately 37 to the cylinder axis 4. The V-leg determined by an exhaust valve 3, on the other hand, only has an angle of approximately 15 ° to the cylinder axis 4. A camshaft 5 is arranged in an angle bisecting position within the approx. 52 ° -V position of the intake and exhaust valves 2 and 3. For the drive connection between the camshaft 5 and the intake and exhaust valves 2 and 3, a rocker arm 6 is rotatably arranged on bearing axles 7.

Die beschriebene V-Stellung der Ein- und Auslaßventile 2 und 3 ergibt in Verbindung mit der Anordnung der beiden Einlaßventile 2 bzw. deren Ventilteller 2' in einem relativ großen freien Abstand und einer Zündkerze 8 bzw. deren Funkenstrecke in diesem Abstand eine für die Größe der Ventilöffnungsquerschnitte und den Verbrennungsvorgang vorteilhafte Gestaltung des Brennraumes 9. Zu diesem Zweck liegen auch die Ventilteller 2' und 3' nahezu tangierend eng an der Kontur 10' des zugehörigen Zylinders 10 sowie die Ventilteller 2' in relativ engem Abstand zum Ventilteller 3'. Der Durchmesser des Ventiltellers 3' des Auslaßventiles 3 entspricht weitgehend dem Radius des Zylinders 10. Die Ventilteller 2' der Einlaßventile 2 übergreifen dabei diejenige Achse 10" der Kontur 10' des Zylinders 10, die parallel zur Ebene der Einlaßventile 2 liegt. Diese Anordnung der Ein- und Auslaßventile 2 und 3 bzw. deren Ventilteller 2' und 3' und der Funkenstrecke der Zündkerze 8 zwischen den Ventiltellern 2' ergibt eine günstige Abstimmung der Ventilöffnungsquerschnitte der Ein- und Auslaßventile 2 und 3 aufeinander und eine nahezu zentrische Lage der Funkenstrecke der Zündkerze 8 im Brennraum 9 mit günstigen Auswirkungen auf die Maschinenfunktion hinsichtlich Leistungsverhalten und Kraftstoffverbrauch.The described V-position of the intake and exhaust valves 2 and 3 results in connection with the arrangement of the two intake valves 2 or their valve plate 2 'at a relatively large free distance and a spark plug 8 or its spark gap in this distance one for the size the valve opening cross sections and the combustion process advantageous design of the combustion chamber 9. For this purpose, the valve plates 2 'and 3' are almost tangentially close to the contour 10 'of the associated cylinder 10 and the valve plate 2' at a relatively close distance from the valve plate 3 '. The diameter of the valve plate 3 'of the exhaust valve 3 largely corresponds to the radius of the cylinder 10. The valve plate 2' of the intake valve 2 overlap that axis 10 "of the contour 10 'of the cylinder 10 which is parallel to the plane of the intake valve 2. This arrangement of the Inlet and outlet valves 2 and 3 or their valve plates 2 'and 3' and the spark gap of the spark plug 8 between the valve plates 2 'results in a favorable coordination of the valve opening cross sections of the inlet and outlet valves 2 and 3 with one another and an almost central position of the spark gap Spark plug 8 in the combustion chamber 9 with favorable effects on the machine function in terms of performance and fuel consumption.

Im Bereich des Brennraumes 9 außerhalb der Ventilteller 2' der Einlaßventile 2 ist eine relativ große Quetschfläche 11 ausgebildet, die im Zusammenwirken mit einem flachen Bodenabschnitt eines Kolbens 12 einen Quetschspalt mit günstigem Einfluß auf den Verbrennungsvorgang bildet.In the area of the combustion chamber 9 outside the valve plate 2 'of the inlet valves 2, a relatively large squeeze area 11 is formed which, in cooperation with a flat bottom portion of a piston 12, forms a squeeze gap with a favorable influence on the combustion process.

Die Zündkerze 8 ist mit ihrer Längsachse in einem größeren Winkel zur Zylinderachse 4 als die Schäfte der Einlaßventile 2 angeordnet. Dadurch kommt der Einbau-Raumbedarf der Zündkerze 8 nicht zwischen dem Raumbedarf der Ventilfedern 13 der Einlaßventile 2 zur Geltung. Darüber hinaus weist die Zündkerze 8 und deren elektrischer Anschluß dadurch eine besonders günstige Zugänglichkeit für die Wartung von der im Betrieb relativ kalten Einlaß-Außenseite des Zylinderkopfes 1 auf.The spark plug 8 is arranged with its longitudinal axis at a larger angle to the cylinder axis 4 than the shafts of the intake valves 2. As a result, the installation space requirement of the spark plug 8 does not come into play between the space requirement of the valve springs 13 of the inlet valves 2. In addition, the spark plug 8 and its electrical connection thereby have particularly favorable accessibility for the maintenance of the relatively cold inlet outside of the cylinder head 1 during operation.

Claims (1)

Zylinderkopf (1) für Viertakt-Brennkraftmaschinen, - mit in V-Stellung hängend angeordneten Ein- und Auslaßventilen (2 und 3), - wobei je Zylinder (10) zwei Einlaßventile (2) parallel nebeneinander entsprechend einem V-Schenkel und - ein Auslaßventil (3) entsprechend dem zweiten V-Schenkel sowie - das Auslaßventil (3) in einer parallelen und abstandsgleich angeordneten, die Zylinderachse (4) enthaltenden Ebene zwischen den beiden Einlaßventilen (2) angeordnet sind und - eine Zündkerze (8) unter einem Winkel zur Zylinderachse (4) in den Brennraum (9) ragt, dadurch gekennzeichnet, - daß die Ventilteller (2') der Einlaßventile (2) einen relativ großen freien Abstand voneinander aufweisen, - wobei die Ventilteller (2') der Einlaßventile (2) in ihrer Schließlage die Kreis-Kontur (10') des Zylinders (10) etwa tangieren und diejenige Achse (10") der Kreis-Kontur (10') übergreifen, die parallel zu der von den Einlaßventilen (2) bestimmten Ebene liegt, - daß der Ventilteller (3') des Auslaßventiles (3) einen Durchmesser etwa gleich dem Radius der Kreis-Kontur (10') des Zylinders (10) aufweist und die Kreis-Kontur (10') und die Zylinderachse (4) etwa tangiert und - daß die Zündkerze (8) zwischen den Einlaßventilen (2) in der von Auslaßventil (3) und Zylinderachse (4) bestimmten Ebene angeordnet ist, - wobei die Längsachse der Zündkerze (8) mit der Zylinderachse (4) einen größeren Winkel einschließt als die von den Einlaßventilen.(2) bestimmte Ebene und - die Funkenstrecke der Zündkerze (8) brennraumseitig im Abstand zur Zylinderachse (4) etwa mittig zwischen den Ventiltellern (2') der Einlaßventile (2) angeordnet ist. Cylinder head (1) for four-stroke internal combustion engines, - with inlet and outlet valves (2 and 3) arranged in a V-position, - With each cylinder (10) two inlet valves (2) parallel next to each other corresponding to a V-leg and - An outlet valve (3) corresponding to the second V-leg and - The outlet valve (3) in a parallel and equally spaced, the cylinder axis (4) containing plane between the two inlet valves (2) are arranged and - A spark plug (8) projects into the combustion chamber (9) at an angle to the cylinder axis (4), characterized in that - That the valve plate (2 ') of the inlet valves (2) have a relatively large free distance from each other, - The valve plate (2 ') of the inlet valves (2) in their closed position the circle contour (10') of the cylinder (10) approximately tangent and that axis (10 ") of the circle contour (10 ') overlap, which parallel to the level determined by the inlet valves (2), - That the valve plate (3 ') of the exhaust valve (3) has a diameter approximately equal to the radius of the circular contour (10') of the cylinder (10) and the circular contour (10 ') and the cylinder axis (4) approximately affects and - That the spark plug (8) is arranged between the inlet valves (2) in the plane determined by the outlet valve (3) and the cylinder axis (4), - The longitudinal axis of the spark plug (8) with the cylinder axis (4) encloses a larger angle than that determined by the inlet valves. (2) plane and - The spark gap of the spark plug (8) on the combustion chamber side at a distance from the cylinder axis (4) is arranged approximately centrally between the valve disks (2 ') of the inlet valves (2).
EP83112438A 1981-06-26 1982-06-18 Cylinder head for a four-stroke internal-combustion engine Expired EP0113450B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3125077 1981-06-26
DE19813125077 DE3125077A1 (en) 1981-06-26 1981-06-26 TWO-CYLINDER FOUR-STOCK BOXER ENGINE, ESPECIALLY DRIVE WIND AIR-COOLED FOR MOTORCYCLES

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP82105324.6 Division 1982-06-18

Publications (2)

Publication Number Publication Date
EP0113450A1 true EP0113450A1 (en) 1984-07-18
EP0113450B1 EP0113450B1 (en) 1986-09-10

Family

ID=6135396

Family Applications (2)

Application Number Title Priority Date Filing Date
EP83112438A Expired EP0113450B1 (en) 1981-06-26 1982-06-18 Cylinder head for a four-stroke internal-combustion engine
EP82105324A Expired EP0068336B1 (en) 1981-06-26 1982-06-18 Two-cylinder four-stroke boxer engine, particularly for a motor cyle, cooled by the oncoming air flux

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP82105324A Expired EP0068336B1 (en) 1981-06-26 1982-06-18 Two-cylinder four-stroke boxer engine, particularly for a motor cyle, cooled by the oncoming air flux

Country Status (5)

Country Link
US (1) US4558676A (en)
EP (2) EP0113450B1 (en)
JP (1) JPS58501045A (en)
DE (3) DE3125077A1 (en)
WO (1) WO1983000188A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4622941A (en) * 1984-03-27 1986-11-18 Automobiles Peugeot Cylinder-head unit for an internal combustion engine having three valves
EP0235121A1 (en) * 1986-02-20 1987-09-02 Hermann Weichsler Internal combustion engine
GB2225610A (en) * 1988-11-30 1990-06-06 Fuji Heavy Ind Ltd Spark plug arrangement in an overhead camshaft engine
US5553580A (en) * 1995-01-13 1996-09-10 Ganoung; David P. Stratified charge engines and method for their operation
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EP0068336A1 (en) 1983-01-05
DE3125077A1 (en) 1983-01-13
DE3262212D1 (en) 1985-03-21
EP0113450B1 (en) 1986-09-10
DE3273260D1 (en) 1986-10-16
EP0068336B1 (en) 1985-02-06
JPS58501045A (en) 1983-06-30
US4558676A (en) 1985-12-17
WO1983000188A1 (en) 1983-01-20
JPS6127569B2 (en) 1986-06-26

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