EP0159249B1 - Three-valve cylinder head for an internal-combustion engine - Google Patents

Three-valve cylinder head for an internal-combustion engine Download PDF

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Publication number
EP0159249B1
EP0159249B1 EP85400592A EP85400592A EP0159249B1 EP 0159249 B1 EP0159249 B1 EP 0159249B1 EP 85400592 A EP85400592 A EP 85400592A EP 85400592 A EP85400592 A EP 85400592A EP 0159249 B1 EP0159249 B1 EP 0159249B1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
face
cylinder
exhaust
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
Application number
EP85400592A
Other languages
German (de)
French (fr)
Other versions
EP0159249A1 (en
Inventor
Maurice Le Creurer
Joseph Behar
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 EP0159249A1 publication Critical patent/EP0159249A1/en
Application granted granted Critical
Publication of EP0159249B1 publication Critical patent/EP0159249B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • F01L1/26—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
    • F02B2275/16—Indirect injection
    • 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
    • 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
    • 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 an internal combustion engine comprising three valves per cylinder, two intake valves and an exhaust valve. We know that this arrangement is particularly advantageous in the case of compression ignition engines.
  • the invention proposes to remedy the aforementioned drawback of an engine as described in document EP-A-0062143 and to further favor the arrangement of the distribution from a single overhead camshaft. for all valves.
  • the invention therefore relates to an internal combustion engine cylinder head with several cylinders, the axes of which are contained in a longitudinal plane, said cylinder head comprising for each cylinder, two inlet valves each cooperating with an inlet duct, a valve exhaust arranged in the vicinity of a first face of the cylinder head and coping with an exhaust duct and a combustion prechamber arranged in the vicinity of a second face of the cylinder head, opposite to the first, the intake ducts being arranged symmetrical one from the other with respect to a diametral plane of the cylinder, containing the mean line of the exhaust duct, this diametral plane being perpendicular to said longitudinal plane, the intake ducts having mean lines contained in planes perpendicular to said longitudinal plane, characterized in that the intake and exhaust ducts open onto said first lateral face of the cylinder head, the exhaust duct opening onto this first lateral face at a level between that of the intake ducts and that of the face of the cylinder head in contact with the
  • Fig. 6 is a section seen along arrow F in FIG. 2.
  • FIG. 4 The figures show a part of a cylinder head 1 of an internal combustion engine with compression ignition.
  • This engine comprises a block 2 delimiting several cylinders, such as 2a, the axes of which are contained in a longitudinal plane L (FIG. 4).
  • two intake valves 3 each cooperate with an intake duct 4 and an exhaust valve 5 cooperates with an exhaust duct 6.
  • the intake 3 and exhaust 5 valves have their axes parallel to the axis of the cylinder 2 ".
  • the exhaust duct 6 has a curved mean line a contained in a diametrical plane D of the cylinder 2, perpendicular to the longitudinal plane L.
  • the mean lines b of the intake ducts 4 are also curved and symmetrical to each other with respect to the diametral plane D. These mean lines are therefore also contained in planes perpendicular to the plane L.
  • the ducts of intake 4 and the exhaust duct 6 open onto the same lateral face 7 of the cylinder head, the exhaust duct 6 opening onto this lateral face at a level between that of the intake ducts 4 and that of the face of the cylinder head in contact with, the cylinder block 2.
  • the other lateral face 8 of the cylinder head is perfectly cleared, which leaves room for the implantation of a pre-chamber 9 with an injector 10 and a glow plug 11. It is in particular possible to give the injector 10 orientation and to the prechamber 9 the shapes which have been optimized on an engine with two valves per cylinder.
  • this arrangement makes it possible to produce a particularly simple and compact distribution, from a single overhead camshaft 12, disposed at equal distances from the axes of the exhaust and intake valves, all the valves being actuated by identical latches (13).

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  • 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)

Description

L'invention se rapporte à un moteur à combustion interne comportant trois soupapes par cylindres, deux soupapes d'admission et une soupape d'échappement. On sait que cette disposition est particulièrement intéressante dans le cas des moteurs à allumage par compression.The invention relates to an internal combustion engine comprising three valves per cylinder, two intake valves and an exhaust valve. We know that this arrangement is particularly advantageous in the case of compression ignition engines.

Dans une solution déjà proposée pour un tel moteur (EP-A-0062143), les conduits d'admission, d'une part, et les conduits d'échappement, d'autre part, débouchent sur les faces latérales opposées de la culasse, ce qui ne permet pas d'implanter une préchambre de combustion dans des conditions idéales, par suite du manque de place dont on dispose.In a solution already proposed for such an engine (EP-A-0062143), the intake ducts, on the one hand, and the exhaust ducts, on the other hand, open onto the opposite lateral faces of the cylinder head, which does not allow to install a combustion prechamber in ideal conditions, due to the lack of space available.

On connaît également d'après le document DE-C-473471 une culasse de moteur à combustion interne comprenant une soupape d'admission et deux soupapes d'échappement qui débouchent sur une même face de la culasse. Cependant l'agencement sur une même face de la culasse. Cependant l'agencement décrit dans ce document antérieur ne comporte pas de préchambre de combustion et l'objectif qui y est recherché est de réchauffer le conduit d'admission au moyen des gaz d'échappement.Also known from document DE-C-473471 is an internal combustion engine cylinder head comprising an intake valve and two exhaust valves which open on the same face of the cylinder head. However, the arrangement on the same face of the cylinder head. However, the arrangement described in this prior document does not include a combustion prechamber and the objective sought there is to heat the intake duct by means of the exhaust gases.

L'invention se propose de remédier à l'inconvénient précité d'un moteur tel que décrit dans le document EP-A-0062143 et de favoriser en outre l'agencement de la distribution à partir d'un arbre à cames en tête, unique pour l'ensemble des soupapes.The invention proposes to remedy the aforementioned drawback of an engine as described in document EP-A-0062143 and to further favor the arrangement of the distribution from a single overhead camshaft. for all valves.

L'invention concerne donc une culasse de moteur à combustion interne à plusieurs cylindres dont les axes sont contenus dans un plan longitudinal, ladite culasse comprenant pour chaque cylindre, deux soupapes d'admisssion coopérant chacune avec un conduit d'admission, une soupape d'échappement disposée au voisinage d'une première face de la culasse et copérant avec un conduit d'échappement et une préchambre de combustion disposée au voisinage d'une deuxième face de la culasse, opposée à la première, les conduits d'admission étant disposés symétriques l'un de l'autre par rapport à un plan diamétral du cylindre, contenant la ligne moyenne du conduit d'échappement, ce plan diamétral étant perpendiculaire audit plan longitudinal, les conduits d'admission ayant des lignes moyennes contenues dans des plans perpendiculaires audit plan longitudinal, caractérisée en ce que les conduits d'admission et d'échappement débouchent sur ladite première face latérale de la culasse, le conduit d'échappement débouchant sur cette première face latérale à un niveau compris entre celui des conduits d'admission et celui de la face de la culasse en contact avec le bloc cylindres, cette culasse étant équipée d'un arbre à cames en tête, disposé à égales distances des axes des soupapes d'échappement et d'admission, toutes les soupapes étant actionnées par des linguets identiques.The invention therefore relates to an internal combustion engine cylinder head with several cylinders, the axes of which are contained in a longitudinal plane, said cylinder head comprising for each cylinder, two inlet valves each cooperating with an inlet duct, a valve exhaust arranged in the vicinity of a first face of the cylinder head and coping with an exhaust duct and a combustion prechamber arranged in the vicinity of a second face of the cylinder head, opposite to the first, the intake ducts being arranged symmetrical one from the other with respect to a diametral plane of the cylinder, containing the mean line of the exhaust duct, this diametral plane being perpendicular to said longitudinal plane, the intake ducts having mean lines contained in planes perpendicular to said longitudinal plane, characterized in that the intake and exhaust ducts open onto said first lateral face of the cylinder head, the exhaust duct opening onto this first lateral face at a level between that of the intake ducts and that of the face of the cylinder head in contact with the cylinder block, this cylinder head being equipped with a camshaft at the head, disposed at equal distances axes of the exhaust and intake valves, all the valves being actuated by identical latches.

Un exemple de réalisation de l'invention fait l'objet de la description qui suit en référence aux dessins joints dans lesquels:

  • la Fig. 1 est une vue en plan d'une partie d'une culasse selon l'invention;
  • la Fig. 2 est une coupe selon la ligne 2-2 de la Fig. 1;
  • la Fig. 3 est une coupe selon la ligne 3-3 de la Fig. 1;
  • la Fig. 4 est une coupe selon la ligne 4-4 de la Fig. 2;
  • la Fig. 5 est une coupe selon la ligne 5-5 de la Fig. 3;
An exemplary embodiment of the invention is the subject of the description which follows with reference to the accompanying drawings in which:
  • Fig. 1 is a plan view of part of a cylinder head according to the invention;
  • Fig. 2 is a section along line 2-2 of FIG. 1;
  • Fig. 3 is a section along line 3-3 in FIG. 1;
  • Fig. 4 is a section along line 4-4 of FIG. 2;
  • Fig. 5 is a section along line 5-5 of FIG. 3;

la Fig. 6 est une coupe vue suivant la flèche F de la Fig. 2.Fig. 6 is a section seen along arrow F in FIG. 2.

On a représenté sur les figures une partie d'une culasse 1 d'un moteur à combustion interne à allumage par compression. Ce moteur comporte un bloc 2 délimitant plusieurs cylindres, tels que 2a, dont les axes sont contenus dans un plan longitudinal L (Fig. 4). Pour chaque cylindre, deux soupapes d'admission 3 coopèrent chacune avec un conduit d'admission 4 et une soupape d'échappement 5 coopère avec un conduit d'échappement 6.The figures show a part of a cylinder head 1 of an internal combustion engine with compression ignition. This engine comprises a block 2 delimiting several cylinders, such as 2a, the axes of which are contained in a longitudinal plane L (FIG. 4). For each cylinder, two intake valves 3 each cooperate with an intake duct 4 and an exhaust valve 5 cooperates with an exhaust duct 6.

Les soupapes d'admission 3 et d'échappement 5 ont leurs axes parallèles à l'axe du cylindre 2". Le conduit d'échappement 6 a une ligne moyenne courbe a contenue dans un plan diamétral D du cylindre 2, perpendiculaire au plan longitudinal L. Les lignes moyennes b des conduits d'admission 4 sont aussi incurvées et symétriques l'une de l'autre par rapport au plan diamétral D. Ces lignes moyennes sont donc aussi contenues dans des plans perpendiculaires au plan L. Les conduits d'admission 4 et le conduit d'échappement 6 débouchent sur la même face latérale 7 de la culasse, le conduit d'échappement 6 débouchant sur cette face latérale à un niveau compris entre celui des conduits d'admission 4 et celui de la face de la culasse en contact avec,le bloc-cylindres 2.The intake 3 and exhaust 5 valves have their axes parallel to the axis of the cylinder 2 ". The exhaust duct 6 has a curved mean line a contained in a diametrical plane D of the cylinder 2, perpendicular to the longitudinal plane L. The mean lines b of the intake ducts 4 are also curved and symmetrical to each other with respect to the diametral plane D. These mean lines are therefore also contained in planes perpendicular to the plane L. The ducts of intake 4 and the exhaust duct 6 open onto the same lateral face 7 of the cylinder head, the exhaust duct 6 opening onto this lateral face at a level between that of the intake ducts 4 and that of the face of the cylinder head in contact with, the cylinder block 2.

Grâce à cette disposition, l'autre face latérale 8 de la culasse est parfaitement dégagée ce qui laisse toute latitude pour l'implantation d'une préchambre 9 avec un injecteur 10 et une bougie de préchauffage 11. Il est notamment possible de donner à l'injecteur 10 l'orientation et à la préchambre 9 les formes qui ont été optimisées sur un moteur à deux soupapes par cylindre.Thanks to this arrangement, the other lateral face 8 of the cylinder head is perfectly cleared, which leaves room for the implantation of a pre-chamber 9 with an injector 10 and a glow plug 11. It is in particular possible to give the injector 10 orientation and to the prechamber 9 the shapes which have been optimized on an engine with two valves per cylinder.

De plus, cette disposition permet de réaliser une distribution particulièrement simple et compacte, a partir d'un seul arbre à cames en tête 12, disposé à égales distances des axes des soupapes d'échappement et d'admission, toutes les soupapes étant actionnées par des linguets (13) identiques.In addition, this arrangement makes it possible to produce a particularly simple and compact distribution, from a single overhead camshaft 12, disposed at equal distances from the axes of the exhaust and intake valves, all the valves being actuated by identical latches (13).

Claims (1)

  1. A cylinder head of an internal combustion engine having a plurality of cylinders whose axes are contained in a longitudinal plane (L), the cylinder head comprising for each cylinder (2a): two inlet valves (3) each cooperating with an inlet pipe (4), an exhaust valve (5) disposed adjacent a first face (7) of the cylinder head and cooperating with an exhaust pipe (6) and a precombustion chamber (9) disposed adjacent a second face (8) of the cylinder head opposite from the first-mentioned face, the inlet pipes (4) being disposed symmetrically of one another in relation to a diamentrical plane (D) of the cylinder containing the mean line (a) of the exhaust pipe (6), the diametrical plane (D) being perpendicular to the said longitudinal plane (L), the inlet pipes (4) having mean lines (b) contained in planes (D1, D2) perpendicular to said longitudinal plane (L), characterized in that the inlet pipes (4) and the exhaust pipe (6) discharge on said first lateral face (7) of the cylinder head, the exhaust pipe (6) discharging on said first lateral face at a level lying between that of the inlet pipes (4) and that of the face of the face of the zylinder head in contact with the cylinder block (2), the cylinder head having an overhead camshaft (12) disposed equidistant from the axes of the exhaust and inlet valves, all the valves being actuated by identical followers (13).
EP85400592A 1984-03-27 1985-03-26 Three-valve cylinder head for an internal-combustion engine Expired EP0159249B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8404761A FR2562162B1 (en) 1984-03-27 1984-03-27 CYLINDER HEAD FOR THREE-VALVE INTERNAL COMBUSTION ENGINE
FR8404761 1984-03-27

Publications (2)

Publication Number Publication Date
EP0159249A1 EP0159249A1 (en) 1985-10-23
EP0159249B1 true EP0159249B1 (en) 1988-03-30

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ID=9302521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400592A Expired EP0159249B1 (en) 1984-03-27 1985-03-26 Three-valve cylinder head for an internal-combustion engine

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US (1) US4622941A (en)
EP (1) EP0159249B1 (en)
DE (1) DE3562032D1 (en)
FR (1) FR2562162B1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2601076B1 (en) * 1986-07-04 1988-10-21 Peugeot INTERNAL COMBUSTION ENGINE CYLINDER HEAD WITH THREE VALVES PER CYLINDER AND AT HIGH PRESSURE IN THE CYLINDERS.
DE3819656C1 (en) * 1988-06-09 1989-02-02 Daimler-Benz Ag, 7000 Stuttgart, De
IT1233237B (en) * 1989-08-04 1992-03-20 Fiat Auto Spa CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE WITH FIVE VALVES PER CYLINDER
FR2653824B1 (en) * 1989-10-26 1994-05-27 Peugeot INLET VALVE FOR A COMPRESSION IGNITION ENGINE AND ENGINE COMPRISING SUCH A VALVE.
IT1240204B (en) * 1990-04-20 1993-11-27 Fiat Auto Spa INTERNAL COMBUSTION ENGINE FOR VEHICLES WITH DIFFERENTIATED OPENING VALVES
US5511520A (en) * 1995-07-03 1996-04-30 Chrysler Corporation Cylinder head construction
DE10231378A1 (en) * 2002-07-11 2004-01-22 Daimlerchrysler Ag Cylinder head of an internal combustion engine
US20240151165A1 (en) * 2022-11-03 2024-05-09 Ronald Phillips Three Valve Cylinder Head Assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE473371C (en) * 1929-03-14 Anonima Giano Macchine Agricol Cylinder head for internal combustion engines as an air or mixture preheater
US2380066A (en) * 1941-03-25 1945-07-10 Pescara Raul Pateras Internal-combustion engine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1915237A (en) * 1933-03-01 1933-06-20 Gen Airmotors Company Internal combustion engine
DE1258655B (en) * 1966-01-24 1968-01-11 Schwermaschb Karl Liebknecht V Cylinder head for internal combustion engines
FR1511586A (en) * 1966-12-08 1968-02-02 Citroen Sa Andre Improvement in engine power
US3429303A (en) * 1967-02-23 1969-02-25 Charles G Roberts Internal combustion engine with improved intake and exhaust
FR94585E (en) * 1967-07-19 1969-09-12 Andre Citroen Camshaft distribution for engine cylinder head.
DE2815701A1 (en) * 1978-04-12 1979-10-25 Daimler Benz Ag IC engine with air or fuel mixt. heated by exhaust gas - has separate supply channels for upper and lower load regions
DE3113308A1 (en) * 1981-04-02 1982-10-21 Bayerische Motoren Werke AG, 8000 München CYLINDER HEAD FOR AIR COMPRESSING, SELF-IGNITIONING INJECTION INTERNAL COMBUSTION ENGINES
DE3125077A1 (en) * 1981-06-26 1983-01-13 Bayerische Motoren Werke AG, 8000 München TWO-CYLINDER FOUR-STOCK BOXER ENGINE, ESPECIALLY DRIVE WIND AIR-COOLED FOR MOTORCYCLES
AU545712B2 (en) * 1982-07-23 1985-07-25 Honda Giken Kogyo Kabushiki Kaisha I.c. engine valve actuating apparatus
EP0100790A1 (en) * 1982-08-18 1984-02-22 Yamaha Motor Co., Ltd. Intake system of an internal-combustion engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE473371C (en) * 1929-03-14 Anonima Giano Macchine Agricol Cylinder head for internal combustion engines as an air or mixture preheater
US2380066A (en) * 1941-03-25 1945-07-10 Pescara Raul Pateras Internal-combustion engine

Also Published As

Publication number Publication date
DE3562032D1 (en) 1988-05-05
US4622941A (en) 1986-11-18
FR2562162A1 (en) 1985-10-04
FR2562162B1 (en) 1988-05-27
EP0159249A1 (en) 1985-10-23

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