FR2525684A3 - Internal combustion engine valve system - operated by overhead camshaft and rocker arms to valves in hemispherical chamber - Google Patents

Internal combustion engine valve system - operated by overhead camshaft and rocker arms to valves in hemispherical chamber Download PDF

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Publication number
FR2525684A3
FR2525684A3 FR8207604A FR8207604A FR2525684A3 FR 2525684 A3 FR2525684 A3 FR 2525684A3 FR 8207604 A FR8207604 A FR 8207604A FR 8207604 A FR8207604 A FR 8207604A FR 2525684 A3 FR2525684 A3 FR 2525684A3
Authority
FR
France
Prior art keywords
valves
plane
axis
rocker arms
operated
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.)
Pending
Application number
FR8207604A
Other languages
French (fr)
Inventor
Jean Georges Dupin
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 Citroen SA
Original Assignee
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 Citroen SA filed Critical Automobiles Citroen SA
Priority to FR8207604A priority Critical patent/FR2525684A3/en
Publication of FR2525684A3 publication Critical patent/FR2525684A3/en
Pending 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
    • F01L1/02—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
    • 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]

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

The spark ignition engine has a cylinder head with a hemispherical combustion chamber for each cylinder. Each chamber has a valve (2), the axis of which is perpendicular to the plane (P) passing through the centres of the cylinders. There is, in each chamber, another valve (3) with its axis sloping to this plane (P) and the axes of the two valves converge towards the cylinder axis (4). The valves are operated by an overhead camshaft (7) and rocker arms (9,10) to convey appropriate movement to them are mounted on parallel shafts (11,12).

Description

MOTEUR A EXPLOSIONS
La présente invention a pour objet un moteur â explosions,
Le moteur selon l'invention est caractérisé en ce qu'il comporte une culasse présentant, en regard de chacun des cylindres, une chambre de combustion hémisphérique qui est munie d'une part, d'une soupape dont l'axe est situé dans un plan perpendiculaire au plan contenant les axes des différents cylindres et, d'autre part d'une soupape dont l'axe est situé dans un plan oblique par rapport à ce plan, les axes des deux soupapes convergeant vers l'axe du cylindre, et en ce qu'il comporte un arbre a cames en tette et des culbuteurs pour commander l'ensemble des soupapes.EXPLOSION ENGINE
The present invention relates to an explosion engine,
The engine according to the invention is characterized in that it comprises a cylinder head having, opposite each of the cylinders, a hemispherical combustion chamber which is provided on the one hand, with a valve whose axis is located in a plane perpendicular to the plane containing the axes of the various cylinders and, on the other hand of a valve whose axis is located in an oblique plane with respect to this plane, the axes of the two valves converging towards the axis of the cylinder, and in that it comprises a camshaft in tette and rocker arms for controlling all of the valves.

On a décrit ci-après, a titre d'exemple non limitatif, un mode de réalisation du moteur selon lSinvention avec référence au dessin schématique dans lequel
La Figure 1 est une vue en plan d'une partie du moteur;
La Figure 2 en est une vue latérale;
La Figure 3 en est une vue suivant la flèche F.An embodiment of the motor according to the invention has been described below, by way of non-limiting example, with reference to the schematic drawing in which
Figure 1 is a plan view of part of the engine;
Figure 2 is a side view;
Figure 3 is a view along the arrow F.

te dessin montre un moteur comportant un certain nombre de cylindres surmontés d'une culasse comprenant en regard de chaque cylindre, une chambre de combustion hémisphérique 1. The drawing shows a motor comprising a certain number of cylinders surmounted by a cylinder head comprising, opposite each cylinder, a hemispherical combustion chamber 1.

Chaque chambre 1 est munie d'une soupape d'échappement 2 at d'une soupape d'admission 3. Each chamber 1 is provided with an exhaust valve 2 and an intake valve 3.

L'axe de la soupape 2 converge vers l'axe 4 du cylindre correspondant et est situé dans un plan perpendiculaire au plan P formé par les axes 4 des différents cylindres. The axis of the valve 2 converges towards the axis 4 of the corresponding cylinder and is located in a plane perpendicular to the plane P formed by the axes 4 of the different cylinders.

L'axe de la soupape 3 converge également vers l'axe 4 du cylindre, mais est situé dans un plan oblique par rapport au plan P. The axis of the valve 3 also converges towards the axis 4 of the cylinder, but is located in an oblique plane with respect to the plane P.

La bougie 5 est située à proximité de l'axe 4 le plus près possible du centre de la culasse, ce qui est facilité par l'inclinaison du plan dans lequel se trouve l'axe de la soupape d'ad- mission 3. The spark plug 5 is located near the axis 4 as close as possible to the center of the cylinder head, which is facilitated by the inclination of the plane in which the axis of the intake valve 3 is located.

Le conduit d'admission 6 est courbe et est dirigé vers la bougie 5. The intake duct 6 is curved and is directed towards the spark plug 5.

La commande des soupapes 2 et 3 est assurée par un arbre à cames en tête 7 dont les cames @ attaquant l'une des extrémités des culbuteurs 9 et 10 montés piv@tant sur des arbres 11 et 12 parallèles à l'arbre 7. L'autre extrémité de ce culbuteur est en appui sur les quenes 13 et 14 des soupapes 2 et 3. The valves 2 and 3 are controlled by an overhead camshaft 7, the cams @ attacking one of the ends of the rocker arms 9 and 10 pivotally mounted on shafts 11 and 12 parallel to the shaft 7. L the other end of this rocker arm bears on the docks 13 and 14 of the valves 2 and 3.

Comme on peut le voi@ à la Figure, 3, le culbuteur 10 attaque obliquement la queue 14 de la soupape d'admission @, Il en résulte lors de la levée ou de l'abaissement de la queue 14 un déplacement latéral de celle-ci par rapport au culbuteur 10.  As can be seen @ in FIG. 3, the rocker arm 10 obliquely attacks the stem 14 of the intake valve @, this results in the raising or lowering of the stem 14 a lateral displacement of the latter. ci with respect to the rocker arm 10.

Il va de soi que la présente invention ne ddit pas être considérée comme limitée au mode de réalisation décrit et représenté, mais en couvre, au contraire, toutes les variantes.  It goes without saying that the present invention should not be considered as being limited to the embodiment described and shown, but on the contrary covers all variants thereof.

Claims (1)

REVENDICATION CLAIM Moteur a explosions caractérisé en ce qu'il comporte une culasse présentant, en regard de chacun des cylindres, une chambre de combustion hémisphérique qui est munie d'une part, d'une soupape 2 dont l'axe est situé dans un plan perpendiculaire au plan P contenant les axes des différents cylindres, et d'autre part d'une soupape 3 dont l'axe est situé dans un plan oblique par rapport a ce plan P, les axes des deux soupapes convergeant vers l'axe 4 du cylindre, et en ce qu'il comporte un arbre d cames en tête 7 et des culbuteurs 9,10 pour commander l'ensemble des soupapes.  Explosive engine characterized in that it comprises a cylinder head having, opposite each of the cylinders, a hemispherical combustion chamber which is provided on the one hand, with a valve 2 whose axis is located in a plane perpendicular to the plane P containing the axes of the various cylinders, and on the other hand of a valve 3 whose axis is located in an oblique plane with respect to this plane P, the axes of the two valves converging towards the axis 4 of the cylinder, and in that it comprises a camshaft at the head 7 and rocker arms 9, 10 for controlling all of the valves.
FR8207604A 1982-04-27 1982-04-27 Internal combustion engine valve system - operated by overhead camshaft and rocker arms to valves in hemispherical chamber Pending FR2525684A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8207604A FR2525684A3 (en) 1982-04-27 1982-04-27 Internal combustion engine valve system - operated by overhead camshaft and rocker arms to valves in hemispherical chamber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8207604A FR2525684A3 (en) 1982-04-27 1982-04-27 Internal combustion engine valve system - operated by overhead camshaft and rocker arms to valves in hemispherical chamber

Publications (1)

Publication Number Publication Date
FR2525684A3 true FR2525684A3 (en) 1983-10-28

Family

ID=9273631

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8207604A Pending FR2525684A3 (en) 1982-04-27 1982-04-27 Internal combustion engine valve system - operated by overhead camshaft and rocker arms to valves in hemispherical chamber

Country Status (1)

Country Link
FR (1) FR2525684A3 (en)

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