EP0244558B1 - Dispositif hydraulique de compensation du jeu des soupapes pour un moteur à combustion interne - Google Patents

Dispositif hydraulique de compensation du jeu des soupapes pour un moteur à combustion interne Download PDF

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Publication number
EP0244558B1
EP0244558B1 EP87100988A EP87100988A EP0244558B1 EP 0244558 B1 EP0244558 B1 EP 0244558B1 EP 87100988 A EP87100988 A EP 87100988A EP 87100988 A EP87100988 A EP 87100988A EP 0244558 B1 EP0244558 B1 EP 0244558B1
Authority
EP
European Patent Office
Prior art keywords
valve
valve stem
adjusting device
cylindrical collar
sliding shoe
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
EP87100988A
Other languages
German (de)
English (en)
Other versions
EP0244558A1 (fr
Inventor
Walter Dipl.-Ing. Speil
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.)
Motomak Motorenbau Maschinen und Werkzeugfabrik Konstruktionen GmbH
Original Assignee
Motomak Motorenbau Maschinen und Werkzeugfabrik Konstruktionen GmbH
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 Motomak Motorenbau Maschinen und Werkzeugfabrik Konstruktionen GmbH filed Critical Motomak Motorenbau Maschinen und Werkzeugfabrik Konstruktionen GmbH
Publication of EP0244558A1 publication Critical patent/EP0244558A1/fr
Application granted granted Critical
Publication of EP0244558B1 publication Critical patent/EP0244558B1/fr
Expired 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
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • 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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2411—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the valve stem and rocker arm
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/10—Connecting springs to valve members

Definitions

  • the invention relates to a hydraulic valve lash compensation device for internal combustion engines, in which a hydraulic compensation element is housed in a bore of a rocker arm or similar actuating element extending in the extension of the shaft of an engine valve, the longitudinally displaceable adjusting piston of which ends in a convex projection towards the valve stem, between the and the flat end face the valve stem a sliding block is arranged, which on the one hand has a spherical cap, in which the spherical projection of the adjusting piston engages, and on the other hand is supported with a flat surface on the end face of the valve stem, while at the same time being held captively on the valve stem.
  • sliding shoes serve to create contact surfaces between the adjusting piston on the one hand and the valve stem on the other hand, by means of which wear is reduced and the lubrication conditions are improved.
  • a sliding shoe is simply inserted between the spherical projection of the adjusting piston and the end face of the valve stem, where it is held in place during operation by the meshing of the spherical projection and the calotte.
  • such a slide shoe has already been provided with a captive lock by allowing it to engage with a flanged edge in a circumferential groove in the valve stem. This means that it is securely attached to the end of the valve stem when the rocker arm is removed and cannot be lost.
  • the disadvantage here is that the engine manufacturer has to keep different valves in stock if he also produces valve controls with mechanical valve clearance adjustment in addition to valve controls with hydraulic lash adjusters (DE-OS 33 04 398).
  • EP-A 0 233 898 belongs to the state of the art according to Art. 54 (3).
  • the invention has for its object to provide a secure mounting of the slide shoe on the valve stem, without it being necessary to keep different valves in stock, and without changes to the valve stem are required.
  • a cage part is arranged on the valve stem or a part connected to it, which extends in the direction of the adjusting piston and ends there in radially inwardly directed holding zones which cover the outer surface of the slide shoe or projections of this surface reach behind that the slide shoe is held captive against the valve stem with free transverse displacement. If necessary, this cage part can be arranged on the valve stem, or on parts connected to it, without changes to the valve stem being necessary.
  • a hydraulic lash adjuster 2 is mounted in the rocker arm 1 in a known manner, the adjusting piston 3 of which ends in a spherical projection 5 at its end facing the valve stem 4.
  • the valve stem 4 is surrounded by the valve spring 6, which is supported on the spring plate 7, which is fastened to the valve stem 4 by means of the valve wedges 8.
  • the sliding block 9 is arranged, in the spherical cap 10 of which the spherical projection 5 of the adjusting piston 3 engages, and the flat end face 11 of which cooperates with the end face of the valve stem 4.
  • the outer lateral surface of the sliding block 9 has a radial projection 12.
  • a cage part 13 is arranged at the end of the valve stem 4, which consists of the cylindrical collar 14, which extends in the direction of the adjusting piston 3, and which ends behind the projection 12 in radially directed holding zones 15 which engage behind the projection 12 so that the Slide shoe 9 can move freely across the valve stem 4, but is held captive on it.
  • the cylindrical collar 14 of the cage part 13 merges with a radial flange 16 into a hollow cylinder 17, which is pressed onto the end of the valve stem 4 in a force-fitting manner.
  • FIG. 2 shows an embodiment in which the cylindrical collar 18 and the radial holding zones 19 formed thereon are formed directly on the valve wedge 8.
  • FIG. 3 on the other hand, only a cylindrical collar 20 is formed on the valve wedge 8, onto which a sheet metal flange 21 is positively placed, which forms the radial holding zone.
  • a cylindrical collar 22 with the radial holding zones 23 is molded directly onto the valve plate 7.
  • valve plate 7 again shows a variant in which only a cylindrical collar 24 is formed on the valve plate 7, which carries a form-fitting sheet metal flange 25 which forms the holding zones.
  • holding zones are always designed as radial ring flanges, as shown in the figures. Rather, it is sufficient if these holding flanges are formed only as individual holding zones which extend over part of their circumference.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (7)

1. Dispositif hydraulique de compensation du jeu des soupapes pour un moteur à combustion interne, dans lequel un élément hydraulique de compensation de jeu est logé dans un alésage d'un culbuteur ou d'un autre organe analogue de manoeuvre, l'alésage étant situé dans le prolongement de la tige d'une soupape de moteur, le piston d'ajustage de l'élément de compensation de jeu à déplacement longitudinal se terminant à son extrémité vers la tige de soupape en une saillie sphérique, entre laquelle et la face frontale plane de la tige de soupape est agencé un patin coulissant qui présente d'un côté une calotte sphérique dans laquelle s'engage la saillie sphérique du piston d'ajustage et qui de l'autre côté, s'appuie par une surface plane sur la face frontale de la tige de soupape de sorte qu'il est retenu en même temps sur la tige de soupape d'une manière à ne pas pouvoir s'échapper de celle-ci, caractérisé en ce que sur la tige de soupape (4) ou sur une pièce (7, 8) reliée à celle-ci, est agencé un élément-cage (13) qui s'étend vers le piston d'ajustage (3) et s'y termine en zones de retenue (15, 19, 23) dirigées radialement vers l'intérieur, lesquelles zones sont engagées derrière la surface périphérique extérieure du patin coulissant (9) ou derrière des saillies (12) de cette surface périphérique, de telle façon que le patin coulissant (9), bien qu'il puisse se déplacer librement en direction transversale par rapport à la tige de soupape (4), ne peut pas s'échapper de celle-ci.
2. Dispositif de compensation du jeu des soupapes selon la revendication 1, caractérisé en ce que l'élément-cage (13) comporte un collet cylindrique (14, 18, 20, 22, 24) dont le diamètre intérieur est plus grand que le plus grand diamètre extérieur du patin coulissant (9), et qui comprend, à son extrémité faisant face au piston d'ajustage (3), des zones de retenue (15, 19, 23) dirigées radialement vers l'intérieur qui s'engagent axialement avec du jeu derrière le plus grand diamètre extérieur du patin coulissant (9).
3. Dispositif de compensation du jeu des soupapes selon la revendication 2, caractérisé en ce que le collet cylindrique (14), à son extrémité faisant face à la tige de soupape (4) est relié par une bride radiale (16) à un cylindre creux (17) monté à force ou par concordance de forme sur l'extrémité de la tige de soupape (4).
4. Dispositif de compensation du jeu des soupapes selon la revendication 2, caractérisé en ce que le collet cylindrique (22, 24) fait partie d'une cuvette de ressort (7) qui est fixée en concordance de forme au moyen de clavettes de soupape (8) sur la tige de soupape (4).
5. Dispositif de compensation du jeu des soupapes selon la revendication 2, caractérisé en ce que le collet cylindrique (18, 20) est constitué par des segments individuels qui font partie des clavettes de soupape (8).
6. Dispositif de compensation du jeu des soupapes selon la revendication 4 ou 5, caractérisé en ce que le collet cylindrique (14, 18, 22) comprend des zones de retenue (15, 19, 23) formées d'un seul tenant avec lui.
7. Dispositif de compensation du jeu des soupapes selon la revendication 4 ou 5, caractérisé en ce que les zones de retenue sont constituées par une bride en tôle (21, 25) fixée sur le collet cylindrique (20, 24) à force ou par concordance de forme.
EP87100988A 1986-04-26 1987-01-24 Dispositif hydraulique de compensation du jeu des soupapes pour un moteur à combustion interne Expired EP0244558B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863614258 DE3614258A1 (de) 1986-04-26 1986-04-26 Hydraulische ventilspielausgleichsvorrichtung fuer verbrennungsmotoren
DE3614258 1986-04-26

Publications (2)

Publication Number Publication Date
EP0244558A1 EP0244558A1 (fr) 1987-11-11
EP0244558B1 true EP0244558B1 (fr) 1989-11-08

Family

ID=6299652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100988A Expired EP0244558B1 (fr) 1986-04-26 1987-01-24 Dispositif hydraulique de compensation du jeu des soupapes pour un moteur à combustion interne

Country Status (6)

Country Link
US (1) US4729350A (fr)
EP (1) EP0244558B1 (fr)
JP (1) JPS62261608A (fr)
BR (1) BR8701961A (fr)
DE (2) DE3614258A1 (fr)
ES (1) ES2012059B3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008056874A1 (de) 2008-01-16 2009-07-23 Schaeffler Kg Betätigungseinrichtung für Gaswechselventile

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3706006A1 (de) * 1987-02-25 1988-09-08 Schaeffler Waelzlager Kg Hydraulisches spielausgleichselement fuer ventilsteuerungen an verbrennungsmotoren
DE3725245A1 (de) * 1987-07-30 1989-02-09 Schaeffler Waelzlager Kg Kugelgelenk, welches zwischen einen kipphebel und einen ventilschaft eines verbrennungsmotors eingeschaltet ist
US4815424A (en) * 1988-03-11 1989-03-28 Eaton Corporation Hydraulic lash adjuster
JPH02126005U (fr) * 1989-03-28 1990-10-17
GB2237858A (en) * 1989-11-11 1991-05-15 Gen Motors Luxembourg Operatio Valve-lash adjustment system.
DE9412789U1 (de) * 1994-08-09 1994-10-06 INA Wälzlager Schaeffler KG, 91074 Herzogenaurach Nockenfolger eines Ventiltriebs einer Brennkraftmaschine
DE19610107A1 (de) * 1996-03-15 1997-09-18 Schaeffler Waelzlager Kg Kipp- oder Schlepphebel mit einem Ventilspielausgleichselement
DE19629203B4 (de) * 1996-07-19 2014-05-22 Schaeffler Technologies Gmbh & Co. Kg Hydraulische Spielausgleichsvorrichtung
DE19642482A1 (de) * 1996-10-15 1998-04-16 Schaeffler Waelzlager Ohg Halteelement
US5680838A (en) * 1996-10-21 1997-10-28 General Motors Corporation Swivel foot lash adjuster
US5709181A (en) * 1997-02-06 1998-01-20 General Motors Corporation Rocker arm assembly
US6397805B1 (en) * 1999-06-28 2002-06-04 Michael G. Knickerbocker Retainer for rocker arm coupling in an internal combustion engine
DE10031973C2 (de) * 2000-06-30 2002-11-21 Bayerische Motoren Werke Ag Ventilhalterung für ein Hubventil einer Brennkraftmaschine
US6557507B2 (en) 2001-03-30 2003-05-06 Caterpillar Inc. Rocker arm assembly
WO2017008857A1 (fr) * 2015-07-16 2017-01-19 Eaton Srl Agencement pour un ensemble dispositif de commande de soupapes

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0223898A1 (fr) * 1985-11-21 1987-06-03 MOTOMAK Motorenbau, Maschinen- und Werkzeugfabrik, Konstruktionen GmbH Dispositif hydrauliquede compensation de jeu

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DE420655C (de) * 1924-10-04 1925-10-29 Fiat Societa Anonima Fa Federanordnung fuer die Ventile von Explosionsmotoren
US2036936A (en) * 1932-04-04 1936-04-07 Halford Frank Bernard Valve gear for internal combustion engines
US2851022A (en) * 1954-11-09 1958-09-09 Gen Motors Corp Poppet valve operating mechanism
US3164366A (en) * 1961-12-27 1965-01-05 Thompson Ramo Wooldridge Inc Valve tip construction
FR1332621A (fr) * 1962-06-04 1963-07-19 Alsacienne Constr Meca Perfectionnement aux commandes de soupapes de moteurs avec rattrapage automatique dejeu
US3978830A (en) * 1975-01-13 1976-09-07 Trw Inc. Snap-on spring retainer lock
US4180030A (en) * 1977-09-19 1979-12-25 Mcwhirter John A Valve lock assembly
JPS6033283Y2 (ja) * 1979-01-31 1985-10-04 日産ディーゼル工業株式会社 バルブステムキヤツプ飛び出し防止装置
DE3304398A1 (de) * 1983-02-09 1984-08-09 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Innenelement fuer ein hydraulisches ventilspielausgleichselement fuer verbrennungsmotoren
JPS59175614U (ja) * 1983-05-11 1984-11-24 アイシン精機株式会社 内燃機関のバルブ駆動装置
JPS6047806A (ja) * 1983-08-24 1985-03-15 Aisin Seiki Co Ltd 内燃機関の油圧リフタ
US4502428A (en) * 1984-02-22 1985-03-05 General Motors Corporation Lash adjuster with follower body retainer
JPH029046Y2 (fr) * 1984-08-29 1990-03-06

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0223898A1 (fr) * 1985-11-21 1987-06-03 MOTOMAK Motorenbau, Maschinen- und Werkzeugfabrik, Konstruktionen GmbH Dispositif hydrauliquede compensation de jeu

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008056874A1 (de) 2008-01-16 2009-07-23 Schaeffler Kg Betätigungseinrichtung für Gaswechselventile

Also Published As

Publication number Publication date
JPH0452846B2 (fr) 1992-08-25
DE3614258A1 (de) 1987-10-29
US4729350A (en) 1988-03-08
BR8701961A (pt) 1988-02-02
DE3760966D1 (en) 1989-12-14
ES2012059B3 (es) 1990-03-01
EP0244558A1 (fr) 1987-11-11
JPS62261608A (ja) 1987-11-13

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