EP0241434A2 - Ventilkontrollvorrichtung für die Steuerung einer Brennkraftmaschine - Google Patents

Ventilkontrollvorrichtung für die Steuerung einer Brennkraftmaschine Download PDF

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Publication number
EP0241434A2
EP0241434A2 EP87830104A EP87830104A EP0241434A2 EP 0241434 A2 EP0241434 A2 EP 0241434A2 EP 87830104 A EP87830104 A EP 87830104A EP 87830104 A EP87830104 A EP 87830104A EP 0241434 A2 EP0241434 A2 EP 0241434A2
Authority
EP
European Patent Office
Prior art keywords
stem
valves
control device
walls
timing system
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.)
Withdrawn
Application number
EP87830104A
Other languages
English (en)
French (fr)
Other versions
EP0241434A3 (de
Inventor
Giorgio Bertero
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.)
Fiat Auto SpA
Original Assignee
Fiat Auto SpA
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 Fiat Auto SpA filed Critical Fiat Auto SpA
Publication of EP0241434A2 publication Critical patent/EP0241434A2/de
Publication of EP0241434A3 publication Critical patent/EP0241434A3/de
Withdrawn legal-status Critical Current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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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
    • 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 present invention regards a device designed to control matched and parallel valves in internal combustion engines, fitted with overhead camshaft and at least three valves per cylinder.
  • the scope of the present invention is to simplify at most the simultaneous control of two valves with their axes lying on the same plane.
  • An additional scope is to obtain a very low command in order to reduce the overall size of the engine at a minimum.
  • 1 sketchly shows the cylinder head of an internal combustion engine fitted with at least three valves per cylinder.
  • Numeral 2 indicates the two ducts (in the example shown) of the engine, controlled by two valves 3 running into valve guides 4 and kept against the valve seats 5 by two springs 6 connected to the stem tips 7 through cotters 8 which insert into a groove at the bottom of the stem itself.
  • the springs are housed in a recess 9 obtained in the cylinder head and rest on the bottom of the recess itself.
  • the stem 13 presents an axial hole. 14 and is slidingly fitted on a pin 15 press fitted in the head 1.
  • the stem 13 shows a section with two convex walls 18 opposite between each other and blended by two concave walls 19 also opposite between each other.
  • the mushroom guide is accomplished by contact between the convex walls 18 and related concave seats 20 obtained in the side walls of the recess 9 in the cylinder head.
  • the cam 21 of the camshaft 22 On the head 11 of the mushroom element 12 acts the cam 21 of the camshaft 22, which can be arranged at right angles with the plane passing through the two stems 7 (see Fig. 8), or can be placed parallelly or across it (see Fig. 6).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP87830104A 1986-03-25 1987-03-19 Ventilkontrollvorrichtung für die Steuerung einer Brennkraftmaschine Withdrawn EP0241434A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT67232/86A IT1189626B (it) 1986-03-25 1986-03-25 Dispositivo di comando valvole di distribuzione in un motore a combustione interna
IT6723286 1986-03-25

Publications (2)

Publication Number Publication Date
EP0241434A2 true EP0241434A2 (de) 1987-10-14
EP0241434A3 EP0241434A3 (de) 1987-10-28

Family

ID=11300697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87830104A Withdrawn EP0241434A3 (de) 1986-03-25 1987-03-19 Ventilkontrollvorrichtung für die Steuerung einer Brennkraftmaschine

Country Status (3)

Country Link
EP (1) EP0241434A3 (de)
BR (1) BR8701732A (de)
IT (1) IT1189626B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2657669A1 (fr) * 1990-01-30 1991-08-02 Peugeot Dispositif pour l'actionnement simultane d'au moins deux soupapes voisines.
EP0586884A1 (de) * 1992-08-26 1994-03-16 IVECO FIAT S.p.A. Brennkraftmaschine mit einer verbesserten Ventilsteuervorrichtung
DE4410124A1 (de) * 1994-03-24 1995-09-28 Schaeffler Waelzlager Kg Verdrehsicherung eines Traversenstößels einer Ventilbetätigungseinrichtung einer Brennkraftmaschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB454761A (en) * 1936-02-25 1936-10-07 Joseph Maina Improvements in or relating to valve mechanisms for internal combustion engines
GB2046357A (en) * 1979-03-30 1980-11-12 Maserati Alfieri Off An induction system for an internal combustion engine
FR2553823B3 (fr) * 1983-10-25 1986-01-03 Renault Poussoir de soupape pour moteurs a combustion interne et arbres a cames en tete

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2657669A1 (fr) * 1990-01-30 1991-08-02 Peugeot Dispositif pour l'actionnement simultane d'au moins deux soupapes voisines.
EP0586884A1 (de) * 1992-08-26 1994-03-16 IVECO FIAT S.p.A. Brennkraftmaschine mit einer verbesserten Ventilsteuervorrichtung
DE4410124A1 (de) * 1994-03-24 1995-09-28 Schaeffler Waelzlager Kg Verdrehsicherung eines Traversenstößels einer Ventilbetätigungseinrichtung einer Brennkraftmaschine

Also Published As

Publication number Publication date
IT8667232A1 (it) 1987-09-25
BR8701732A (pt) 1988-01-12
IT8667232A0 (it) 1986-03-25
IT1189626B (it) 1988-02-04
EP0241434A3 (de) 1987-10-28

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Inventor name: BERTERO, GIORGIO