EP0487367A1 - Ventilsteuervorrichtung mit Kipphebel für eine Brennkraftmaschine - Google Patents

Ventilsteuervorrichtung mit Kipphebel für eine Brennkraftmaschine Download PDF

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Publication number
EP0487367A1
EP0487367A1 EP91402866A EP91402866A EP0487367A1 EP 0487367 A1 EP0487367 A1 EP 0487367A1 EP 91402866 A EP91402866 A EP 91402866A EP 91402866 A EP91402866 A EP 91402866A EP 0487367 A1 EP0487367 A1 EP 0487367A1
Authority
EP
European Patent Office
Prior art keywords
valve
rod
cylinder
axis
rocker arm
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Withdrawn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
EP91402866A
Other languages
English (en)
French (fr)
Inventor
Patrick Garnier
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 EP0487367A1 publication Critical patent/EP0487367A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • 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]

Definitions

  • the present invention relates to a device for controlling a stem valve, of an internal combustion engine, by means of a rocker arm of which a lever arm, which controls the movements of the valve, extends in a substantially direction perpendicular to the axis of the valve stem.
  • valve stems of considerable length are liable to deform during buckling during the operation of the engine.
  • the invention proposes an arrangement of the type mentioned above, characterized in that an intermediate control member is interposed between the end of the lever arm for controlling the rocker arm and the free end of the valve stem.
  • the engine part shown in FIG. 1 comprises a separate control of two rows of intake and exhaust valves placed at the head of the cylinders (not shown in the figures) of the engine.
  • two camshafts 12 and 14 are mounted above a cylinder head 16. They are carried by a common support 18 fixed on the cylinder head 16. The axes of rotation of the two camshafts 12 and 14 are parallel and located in a plane perpendicular to the axis of the valve stems.
  • a first row of valves (not shown in FIG. 1) is controlled directly by the camshaft 12.
  • a second row of valves including a valve 20 is shown in FIG. 1, is controlled by means of the camshaft 14 and rocker arms 22, one of which is shown in FIG. 1.
  • a cylinder head cover 24 is fixed to the camshaft support 18.
  • the valve 20 comprises a rod 26 of axis XX sliding in a guide 28 of the cylinder head 16.
  • the rod 26 of the valve 20 has a free end 30 which opens out from the guide 28 into a cavity of the assembly formed by the cylinder head 16 and the camshaft support 18.
  • the valve 20 is resiliently returned to its seat (not shown in FIG. 1) by springs 32 and 33 resting on the one hand on the cylinder head and, on the other hand, on a cup 34 secured to the rod 26.
  • This bore opens, at its lower end, facing the end 30 of the rod 26 of the valve 20, and, at its upper end, in the plane containing the two axes of the camshafts 12 and 14, so that the upper end of the bore is substantially opposite the end 40 of the rocker arm 22 which acts on the rod 26.
  • the actuation of the valve is effected by means of an elongated cylindrical rod or part called cylinder 38 which slides in the bore 36 forming a guide. So the end lower 41 of cylinder 38 cooperates with end 30 of rod 26 of valve 20 and, upper end 42 of cylinder 38 cooperates with end 40 of rocker arm 22.
  • the cylinder 38 is lubricated by static lubrication means, using an oil supply pipe 44 shown in FIG. 1.
  • a portion of reduced section 48 of the cylinder 38 ensures good distribution of the lubricating oil on the surfaces in contact.
  • the cam 52 of the camshaft 14 actuates the end 54 of the rocker arm 22.
  • the rocker arm 22 actuates the end 42 of the cylinder 38.
  • the cylinder 38 actuates l end 30 of the rod 26 of the valve 20.
  • the cylinder 38 therefore forms an intermediate control member of the valve 20.
  • the device described above makes it possible to control, by a conventional rocker system, a valve whose free end of the rod of normal length is offset downward relative to the end of the lever arm of the rocker which controls the movements of the valve.
  • valve control device described above overcomes the space requirement of the upper part of the cylinder head of an engine, due to the arrangement of the two camshafts carried by a common support above the cylinder head and by the rocker arms of a separate valve control system intake and exhaust of an internal combustion engine.
  • the device according to the invention is applicable in the case where the cylinder head 16 and the camshaft support 18 form a single element, the axes of the two camshafts then being formed in the face upper part of this room.

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)
EP91402866A 1990-11-19 1991-10-25 Ventilsteuervorrichtung mit Kipphebel für eine Brennkraftmaschine Withdrawn EP0487367A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9014364A FR2669375A1 (fr) 1990-11-19 1990-11-19 Dispositif de commande par culbuteur de soupape d'un moteur a combustion interne.
FR9014364 1990-11-19

Publications (1)

Publication Number Publication Date
EP0487367A1 true EP0487367A1 (de) 1992-05-27

Family

ID=9402326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402866A Withdrawn EP0487367A1 (de) 1990-11-19 1991-10-25 Ventilsteuervorrichtung mit Kipphebel für eine Brennkraftmaschine

Country Status (2)

Country Link
EP (1) EP0487367A1 (de)
FR (1) FR2669375A1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB109285A (en) * 1916-09-01 1917-09-03 Sunbeam Motor Car Co Ltd Improvements in VAlve-operating Mechanism for Internal Combustion Engines.
EP0285598A1 (de) * 1987-03-23 1988-10-05 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Einspritzbrennkraftmaschine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6158907A (ja) * 1985-08-08 1986-03-26 Mazda Motor Corp エンジンの動弁装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB109285A (en) * 1916-09-01 1917-09-03 Sunbeam Motor Car Co Ltd Improvements in VAlve-operating Mechanism for Internal Combustion Engines.
EP0285598A1 (de) * 1987-03-23 1988-10-05 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Einspritzbrennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 222 (M-504)(2278) 2 Août 1986 & JP-A-61 058 907 ( MAZDA ) 26 Mars 1986 *

Also Published As

Publication number Publication date
FR2669375A1 (fr) 1992-05-22

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