EP0209426B1 - Zylinderkopf einer Brennkraftmaschine mit drei Ventilen pro Zylinder - Google Patents

Zylinderkopf einer Brennkraftmaschine mit drei Ventilen pro Zylinder Download PDF

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Publication number
EP0209426B1
EP0209426B1 EP19860401325 EP86401325A EP0209426B1 EP 0209426 B1 EP0209426 B1 EP 0209426B1 EP 19860401325 EP19860401325 EP 19860401325 EP 86401325 A EP86401325 A EP 86401325A EP 0209426 B1 EP0209426 B1 EP 0209426B1
Authority
EP
European Patent Office
Prior art keywords
intake
cylinder head
valve
valves
exhaust
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
EP19860401325
Other languages
English (en)
French (fr)
Other versions
EP0209426A1 (de
Inventor
Gabriel Laine
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 EP0209426A1 publication Critical patent/EP0209426A1/de
Application granted granted Critical
Publication of EP0209426B1 publication Critical patent/EP0209426B1/de
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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • 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
    • 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
    • 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
    • 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 a cylinder head of an internal combustion engine with positive ignition, comprising, as described by FR-A-2 048182, combustion chambers associated with corresponding cylinders of the engine and in which each combustion chamber is provided two intake valves and one exhaust valve suitable for closing two intake pipes and one exhaust pipe opening respectively in two opposite lateral faces of the cylinder head, and in each combustion chamber the exhaust valve and a first inlet valve are arranged on the side of the side face where the exhaust duct opens.
  • the presence of two intake valves per combustion chamber makes it possible not only to provide a relatively large passage section for the intake gases, and consequently to obtain a large engine power, but also to provide a variable supply. optimized by introducing intake gases alternately by a single valve at low speeds and / or at low engine loads, or by the two valves at high speeds and / or at heavy loads.
  • the two intake valves of each combustion chamber are juxtaposed, generally on the side of the side face where the intake ducts open, and on the opposite side are arranged the exhaust valve and a spark plug.
  • the internal end of the latter provided with electrodes causing the ignition of the mixture introduced into the chamber, is consequently notably spaced from the center of the chamber, close to the exhaust valve, and relatively far from one of the two intake valves. This often results in incomplete combustion of the mixture and a strong knocking tendency, which results in defective engine performance and excessive deterioration of its moving equipment.
  • DE-A-3 033 072 relates to diesel engines, therefore with self-ignition, and not with spark-ignition engines.
  • the diametrically opposite position of the intake valves aims, in association with the highly curved conduits in top view, to perfect the swirl of air, desirable in a diesel engine.
  • the location of the injector in the middle of the flat combustion chamber aims to concentrate the jet of fuel in a central recess of the piston.
  • GB-A-967 697 shows valves of a cylinder head driven by an overhead camshaft, via two respective pushers for a first and a second valve, and via a rocker arm for a third valve.
  • the object of the invention is to produce a cylinder head of the aforementioned type, with three valves per cylinder, providing the engine with good efficiency and a minimal knocking tendency.
  • the two intake valves are approximately diametrically opposite, and the internal end of the spark plug is located between the two intake valves, on the side opposite the exhaust valve and near the center. from the chamber, and the spark plug is screwed into the lateral face where the intake ducts open, and it is disposed, in an inclined position, under the duct associated with the first intake valve.
  • valves are driven by an overhead camshaft, via two respective pushers for the exhaust valve and for the first intake valve, and via a rocker arm for the other intake valve.
  • a cylinder head 1 of an internal combustion engine intended to cover by its underside 2 a cylinder block delimiting with pistons several combustion chambers 3.
  • each chamber 3 open two intake ducts 4 , and an exhaust duct 6 which can be closed off respectively with intake rod 7, 8 or exhaust valve 9 (hidden by the valve 7 in FIG. 1).
  • the intake ducts 4, 5 open into a first lateral face 10 of the cylinder head 1, and the exhaust duct 6 opens into the opposite side 11, communicating respectively with pipes admission 12 and exhaust 13.
  • the conduits 4 and 5 are separated up to the face 10 and the tube 12 has two orifices to the right of this face.
  • the conduits 4 and 5 meet before opening onto the face 10, and the tube 12 then has a single orifice at the right of this face.
  • the intake valve 7 and the exhaust valve 9 are substantially perpendicular to the face 2 and located, above the chamber 3, on the side of the side face 11 and each cooperate with one of two parallel pushers 14 , 15 actuated respectively by a cam 16 and a cam 17 integral with a shaft 18 carried by the cylinder head 1 parallel to the faces 2, 10 and 11.
  • the intake valve 8 is significantly inclined with respect to the other two valves 7, 9 and is located, above the chamber 3, on the side of the side face 10, or it cooperates with a rocker arm oscillating on an axis 20 and actuated by a cam 21 of the shaft 18.
  • This axis 20 is carried by several bearing caps 22 which hold the shaft 18 on transverse partitions 23 of the cylinder head 1.
  • Each valve is conventionally returned to its seat by a spring such as those 24 and 25 corresponding to valves 7 and 8.
  • a cylinder head cover 26 covers the cylinder head 1 so as to protect the shaft 18 and its bearings 22, the rocker arms 19 and their axis 20 as well as the pushers 14, 15 and the springs. This cylinder head cover is removed from Figure 2 to clarify the drawing.
  • the camshaft 18 and the rocker shafts being located relatively high, above the valves 7, 9 and their pushers 14, 15, the intake ducts 4 and 5 have large radii of curvature - for example greater at 3 cm - and open high enough on the face 10 to make room for a spark plug 30 screwed into the cylinder head 1 on the side of this face, near the valve 8 and below the intake duct 4.
  • the spark plug is relatively slightly inclined relative to the face 2 of the cylinder head 1 and, according to a feature of the invention, its internal end 30a provided with electrodes is located, in the chamber 3, near the center of the latter , on the side opposite to the exhaust valve 9 and between the two intake valves 7, 8, which are approximately diametrically opposite.
  • the intake ducts 4 and 5 have good permeability, that is to say a low resistance to flow for the gases which pass there, which optimizes the supply of the chamber. 3, in particular for the high engine operating speeds.

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 (2)

1. Zylinderkopf einer Brennkraftmaschine mit gesteuerter Zündung, umfassend den entsprechenden Zylindern des Motors zugeordnete Brennkammern (3) und in dem jede Brennkammer (3) mit einer Zündkerze (30), mit zwei Einlaßventilen (7, 8) und mit einem Auslaßventil (9) versehen ist, die geeignet sind, zwei Einlaßleitungen (4, 5) und eine Auslaßleitung (6) zu verschließen, die jeweils in zwei gegenüberliegenden Seitenwänden (10, 11) des Zylinderkopfes (1) münden, und in jeder Brennkammer (3) das Auslaßventil (9) und ein erstes Einlaßventil (7) zur Seitenwand (11) angeordnet sind, wo der Auslaßkanal (6) mündet, dadurch gekennzeichnet, daß die beiden Einlaßventile (7,8) beinahe diametral gegenüberliegend sind und das innere Ende (30a) der Zündkerze (30) zwischen den beiden Einlaßventilen (7, 8) zur Seite gegenüberliegend dem Auslaßventil (9) und in der Nahe des Zentrums der Kammer (3) liegt und daß die Zündkerze (30) in der Seitenwand (10) eingeschraubt ist, wo die Einlaßkanäle (4, 5) münden, und sie in geneigter Position unter der dem ersten Einlaßventil (7) zugeordneten Leitung (4) angeordnet ist.
2. Zylinderkopf nach Anspruch 1, dadurch gekennzeichnet, daß die Ventile (7, 8, 9) durch eine Welle (18) mit Hocken (16, 17) im Kopf angetrieben sind, mittels zweier entsprechender Druckvorrichtungen (15, 14) für das Auslaßventil (9) und für das erste Einlaßventil (7) und mittels eines Ventilkipphebels (19) für das andere Einlaßventil (8).
EP19860401325 1985-07-08 1986-06-17 Zylinderkopf einer Brennkraftmaschine mit drei Ventilen pro Zylinder Expired EP0209426B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8510424 1985-07-08
FR8510424A FR2584455B1 (fr) 1985-07-08 1985-07-08 Culasse de moteur a combustion interne avec trois soupapes par cylindre

Publications (2)

Publication Number Publication Date
EP0209426A1 EP0209426A1 (de) 1987-01-21
EP0209426B1 true EP0209426B1 (de) 1988-11-02

Family

ID=9321072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860401325 Expired EP0209426B1 (de) 1985-07-08 1986-06-17 Zylinderkopf einer Brennkraftmaschine mit drei Ventilen pro Zylinder

Country Status (4)

Country Link
EP (1) EP0209426B1 (de)
BR (1) BR8603167A (de)
DE (1) DE3661092D1 (de)
FR (1) FR2584455B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2228533A (en) * 1988-12-24 1990-08-29 Ford Motor Co I.c.engine valve gear
AT402535B (de) * 1990-02-23 1997-06-25 Avl Verbrennungskraft Messtech Brennkraftmaschine mit zumindest zwei einlassventilen je motorzylinder
IT1293668B1 (it) * 1997-08-01 1999-03-08 Fiat Ricerche Motore a combustione interna ad accensione comandata con camera di combustione dotata di tre valvole e candela centrale.
FR2769668B1 (fr) * 1997-10-14 1999-12-24 Renault Moteur a combustion interne a allumage commande et a injection directe
DE19853412A1 (de) * 1998-11-19 2000-05-25 Bayerische Motoren Werke Ag Hubkolben-Brennkraftmaschine mit einem Dreiventil-Zylinderkopf

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB126389A (en) * 1917-01-29 1919-05-15 Sunbeam Motor Car Co Ltd Improvements in Valve-Operating Mechanism for Internal Combustion Engines.
GB967697A (en) * 1962-08-23 1964-08-26 Vauxhall Motors Ltd Internal combustion engine valve gear
FR2048182A6 (de) * 1969-06-03 1971-03-19 Citroen Sa
DE3033072A1 (de) * 1980-09-03 1982-04-22 Yanmar Diesel Engine Co., Ltd., Osaka Verbrennungsmotor mit direkter kraftstoffeinspritzung
JPS58195024A (ja) * 1982-05-10 1983-11-14 Yamaha Motor Co Ltd 高圧気体燃料エンジン

Also Published As

Publication number Publication date
FR2584455A1 (fr) 1987-01-09
EP0209426A1 (de) 1987-01-21
FR2584455B1 (fr) 1989-07-28
BR8603167A (pt) 1987-02-24
DE3661092D1 (en) 1988-12-08

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