EP0262250A1 - Moteur à combustion interne à quatre temps - Google Patents

Moteur à combustion interne à quatre temps Download PDF

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Publication number
EP0262250A1
EP0262250A1 EP86113585A EP86113585A EP0262250A1 EP 0262250 A1 EP0262250 A1 EP 0262250A1 EP 86113585 A EP86113585 A EP 86113585A EP 86113585 A EP86113585 A EP 86113585A EP 0262250 A1 EP0262250 A1 EP 0262250A1
Authority
EP
European Patent Office
Prior art keywords
axis
valves
camshaft
rotation
tappets
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
EP86113585A
Other languages
German (de)
English (en)
Other versions
EP0262250B1 (fr
Inventor
Max Ruf
Erwin Korostenski
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.)
Audi AG
Original Assignee
Audi AG
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
Priority to DE19853524622 priority Critical patent/DE3524622A1/de
Application filed by Audi AG filed Critical Audi AG
Priority to DE8686113585T priority patent/DE3669559D1/de
Priority to EP19860113585 priority patent/EP0262250B1/fr
Publication of EP0262250A1 publication Critical patent/EP0262250A1/fr
Application granted granted Critical
Publication of EP0262250B1 publication Critical patent/EP0262250B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01L1/26—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
    • F01L1/265—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 peculiar to machines or engines with three or more intake 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
    • 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
    • F02F1/4221—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder particularly for three or more inlet valves
    • 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
    • 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

Definitions

  • the invention relates to a four-stroke internal combustion engine according to the preamble of claim 1.
  • the invention has for its object to provide a four-stroke internal combustion engine of the type specified in the preamble of claim 1, in which a trouble-free accommodation of the tappets is possible without weakening the cylinder head.
  • the central longitudinal axes of the tappets can coincide with the central longitudinal axes of the associated valves. In this case, the valves are tilted accordingly so that their longitudinal central axes do not intersect the axis of rotation of the camshaft.
  • the longitudinal central axes of the tappets can be laterally offset from the longitudinal central axes of the associated valves. In both cases, the arrangement can be such that the cams hit the relevant tappets not in the middle, but laterally, whereby rotation of the valve tappet and the associated valve is achieved and wear is reduced.
  • the cylinder head 1 shown in the drawings has three intake valves 3, 4 and 5 and two exhaust valves 6 and 7 for each cylinder, i.e. for each combustion chamber 2.
  • Each of these valves carries at its end facing away from the combustion chamber 2 a bucket tappet 8a to 8c which is displaceably guided in a bore 9 in the cylinder head upper part 10.
  • the inlet valves 3, 4 and 5 are actuated via their bucket tappets 8a to 8c by the cams 11, 12 and 13 of a camshaft 14 indicated in FIG. 4.
  • a second camshaft 15 with cams 16 serves to actuate the exhaust valves 6, 7, only one of which is shown in the drawing.
  • the valves are pressed onto their valve seat in the usual way by springs.
  • a spark plug bore 17 is provided in the center of the combustion chamber 2.
  • the cup tappets 8a, 8b and 8c are arranged in such a way that their longitudinal central axes 18, 19 and 20 do not, as usual, intersect the axis of rotation 21 of the camshaft 14, but instead run at a distance from it.
  • the bores 9 for receiving these bucket tappets are thus offset from one another, as can be seen in FIG. 4, namely that the longitudinal center line 19 of the middle bucket tappet 8b penetrates the plane 22 through the axis of rotation 21 of the camshaft 14 at right angles to this longitudinal center axis 19 ( Fig. 2) in Figs. 2 and 4 to the right of the camshaft axis of rotation 21 at a distance a.
  • the longitudinal center axes 18 and 20 of the two outer tappets 8a and 8c penetrate said plane 20 in FIGS. 3 and 4 to the left of the camshaft axis of rotation 21 at a distance b .
  • the size of the lateral offset depends on the available space. Often it may be sufficient to arrange only the tappet 8b of the central inlet valve 4 such that its longitudinal center line 19 penetrates the plane 22 at a distance from the camshaft axis of rotation 21.
  • the lateral offset of the longitudinal center line 19 can be achieved in that the valve 4 is installed with a corresponding inclination.
  • the valve 3 or 5 can be arranged in the usual way such that its longitudinal center line 23 intersects the camshaft axis of rotation 21, but the bucket tappet 8a or 8c is arranged eccentrically to the valve 3 or 5, so that its longitudinal center axis 18 or 20 penetrates the plane 22 at a distance b from the camshaft axis of rotation 21.
  • the tappets 8a and 8c of the valves 3 and 5 are arranged in such a way that their longitudinal central axis 18 or 20 penetrates the plane 22 at a distance b in the direction of rotation D of the cam 11 or 13.
  • a relatively large valve lift and thus a large flow cross-section is achieved in the first third of the entire valve lift, in which the greatest pressure drop prevails, as a result of which Inlet valves the filling is improved and a faster pushing out of the combustion gases takes place with exhaust valves.
  • the cams 11, 12 and 13 act centrally on the cup tappets 8a, 8b and 8c.
  • three intake valves and two exhaust valves are provided per cylinder.
  • the invention is also applicable to internal combustion engines with three intake valves and three exhaust valves per cylinder, in which case the tappets of the exhaust valves are expediently arranged as described above with respect to the tappets of the intake valves.

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)
EP19860113585 1985-07-10 1986-10-02 Moteur à combustion interne à quatre temps Expired - Lifetime EP0262250B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19853524622 DE3524622A1 (de) 1985-07-10 1985-07-10 Viertakt-brennkraftmaschine
DE8686113585T DE3669559D1 (de) 1986-10-02 1986-10-02 Viertakt-brennkraftmaschine.
EP19860113585 EP0262250B1 (fr) 1986-10-02 1986-10-02 Moteur à combustion interne à quatre temps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19860113585 EP0262250B1 (fr) 1986-10-02 1986-10-02 Moteur à combustion interne à quatre temps

Publications (2)

Publication Number Publication Date
EP0262250A1 true EP0262250A1 (fr) 1988-04-06
EP0262250B1 EP0262250B1 (fr) 1990-03-14

Family

ID=8195470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860113585 Expired - Lifetime EP0262250B1 (fr) 1985-07-10 1986-10-02 Moteur à combustion interne à quatre temps

Country Status (2)

Country Link
EP (1) EP0262250B1 (fr)
DE (1) DE3669559D1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0340834A2 (fr) * 1988-05-05 1989-11-08 MOTORI MODERNI s.r.l. Système des soupapes et commande-soupapes pour un moteur à combustion interne à haute performance spécifique
FR2656654A1 (fr) * 1989-12-29 1991-07-05 Peugeot Dispositif d'actionnement d'une soupape de moteur a combustion.
FR2656898A1 (fr) * 1990-01-11 1991-07-12 Peugeot Agencement de soupapes dans un moteur a combustion.
EP0436779A1 (fr) * 1989-12-11 1991-07-17 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Culasse pour moteur à combustion interne
EP0444562A1 (fr) * 1990-03-02 1991-09-04 FERRARI S.p.A. Système de distribution, notamment pour un moteur à combustion interne avec un certain nombre de soupapes par cylindre
US5094197A (en) * 1991-03-01 1992-03-10 Ferrari S.P.A. Timing system, particularly for an internal combustion engine with a number of valves per cyclinder
EP0994241A1 (fr) * 1998-10-12 2000-04-19 Isuzu Motors Limited Dispositif de commande de soupapes pour moteur à double arbre à cames en tête

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063385A2 (fr) * 1981-04-22 1982-10-27 Yamaha Motor Co., Ltd. Moteur à combustion interne à quatre temps
US4612885A (en) * 1984-04-11 1986-09-23 Yamaha Hatsudoki Kabushiki Kaisha Camshaft bearing arrangement for overhead cam engine
DE3524622A1 (de) * 1985-07-10 1987-01-15 Audi Ag Viertakt-brennkraftmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063385A2 (fr) * 1981-04-22 1982-10-27 Yamaha Motor Co., Ltd. Moteur à combustion interne à quatre temps
US4612885A (en) * 1984-04-11 1986-09-23 Yamaha Hatsudoki Kabushiki Kaisha Camshaft bearing arrangement for overhead cam engine
DE3524622A1 (de) * 1985-07-10 1987-01-15 Audi Ag Viertakt-brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 207 (M-500)[2263], 19. Juli 1986; & JP-A-61 49 113 (YAMAHA MOTOR CO. LTD) 11-03-1986 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0340834A2 (fr) * 1988-05-05 1989-11-08 MOTORI MODERNI s.r.l. Système des soupapes et commande-soupapes pour un moteur à combustion interne à haute performance spécifique
EP0340834A3 (fr) * 1988-05-05 1990-01-31 MOTORI MODERNI s.r.l. Système des soupapes et commande-soupapes pour un moteur à combustion interne à haute performance spécifique
EP0436779A1 (fr) * 1989-12-11 1991-07-17 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Culasse pour moteur à combustion interne
US5080057A (en) * 1989-12-11 1992-01-14 Dr. Ing. H.C.F. Porsche Ag Cylinder head of an internal-combustion engine
FR2656654A1 (fr) * 1989-12-29 1991-07-05 Peugeot Dispositif d'actionnement d'une soupape de moteur a combustion.
FR2656898A1 (fr) * 1990-01-11 1991-07-12 Peugeot Agencement de soupapes dans un moteur a combustion.
EP0444562A1 (fr) * 1990-03-02 1991-09-04 FERRARI S.p.A. Système de distribution, notamment pour un moteur à combustion interne avec un certain nombre de soupapes par cylindre
US5094197A (en) * 1991-03-01 1992-03-10 Ferrari S.P.A. Timing system, particularly for an internal combustion engine with a number of valves per cyclinder
EP0994241A1 (fr) * 1998-10-12 2000-04-19 Isuzu Motors Limited Dispositif de commande de soupapes pour moteur à double arbre à cames en tête
US6276323B1 (en) 1998-10-12 2001-08-21 Isuzu Motors Limited Valve drive mechanism for DOHC engine

Also Published As

Publication number Publication date
EP0262250B1 (fr) 1990-03-14
DE3669559D1 (de) 1990-04-19

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