EP0266685A1 - Poussoir de soupape à réglage hydraulique automatique - Google Patents

Poussoir de soupape à réglage hydraulique automatique Download PDF

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Publication number
EP0266685A1
EP0266685A1 EP87115946A EP87115946A EP0266685A1 EP 0266685 A1 EP0266685 A1 EP 0266685A1 EP 87115946 A EP87115946 A EP 87115946A EP 87115946 A EP87115946 A EP 87115946A EP 0266685 A1 EP0266685 A1 EP 0266685A1
Authority
EP
European Patent Office
Prior art keywords
guide sleeve
cylindrical wall
hollow cylindrical
valve tappet
disc part
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
EP87115946A
Other languages
German (de)
English (en)
Other versions
EP0266685B1 (fr
Inventor
Georg Dr.Ing. E.H. Dipl.-Kfm. Schaeffler
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.)
INA Waelzlager Schaeffler OHG
Original Assignee
INA Waelzlager Schaeffler OHG
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 INA Waelzlager Schaeffler OHG filed Critical INA Waelzlager Schaeffler OHG
Publication of EP0266685A1 publication Critical patent/EP0266685A1/fr
Application granted granted Critical
Publication of EP0266685B1 publication Critical patent/EP0266685B1/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
    • F01L1/20—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
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem

Definitions

  • the invention relates to an automatically hydraulically adjusting valve tappet which is arranged in a guide bore of a cylinder head of an internal combustion engine and which consists of a cup-shaped housing which comprises a hollow cylindrical wall which is closed at one end by a bottom, against which a control cam is connected from the outside starts, and in which a concentric to the hollow cylindrical wall guide sleeve is arranged, which ends at its end facing away from the bottom in the center of a disc part, which merges with its outer circumference into the hollow cylindrical wall of the housing, and which guide sleeve with its other end in a distance from the ground, the actual hydraulic play compensation element being guided in a longitudinally displaceable manner in the guide sleeve.
  • valve lifters are known for example from US-PS 45 90 898. These essentially also meet the requirements placed on them.
  • the valve lifters are particularly required to have the lowest possible mass. This leads to constructions with ever smaller wall thicknesses, which leads to vibrations in the high-frequency accelerations and decelerations that occur during operation, which under unfavorable conditions can lead to fractures and complete destruction of the valve lifters.
  • a particularly critical point is the guide sleeve, which is connected to the cylindrical wall of the cup housing only at one end via a disk part, while it projects freely at its opposite end. If to reduce the mass of the valve lifter also the guide sleeve and the disk part Must be made thinner, this results in a critical situation from a vibration point of view.
  • the invention has for its object to achieve such a stiffening of the housing with simple technical means that even with reduced wall thicknesses there is no risk of damage due to vibrations.
  • a second disc part which starts from the hollow cylindrical wall and additionally supports the guide sleeve at a distance from the first disc part.
  • the second disc part pass into the hollow cylindrical wall in the immediate vicinity of the first disc part, from where it extends in a funnel shape towards the bottom and nearby the bottom of the end of the guide sleeve engages it.
  • the second disc part may be useful to design the second disc part so that it merges into an axial collar at its bore, which receives the guide sleeve in its bore. It only needs to be a tight fit between the guide sleeve on the one hand and the axial collar on the other without additional fasteners being required. On the other hand, however, if necessary, it is entirely possible to firmly connect the second disk part to the guide sleeve by welding, soldering, gluing or the like.
  • Another expedient embodiment can consist in that the second disk part is formed in one piece with the guide sleeve.
  • the two disk parts can finally be arranged at right angles to the longitudinal axis of the valve lifter and at a mutual distance also start in one piece from the two ends of the guide sleeve.
  • the plungers shown in the figures each consist of the cup-shaped housing 1, which is formed from the hollow cylindrical wall 2 and the base 3, which is integral therewith.
  • the guide sleeve 4 is arranged concentrically in the housing 1 and opens at its end facing away from the base 3 into the center of a first disk part 5, which in turn is connected to the hollow cylindrical wall 2.
  • the actual hydraulic play compensation element 6 is guided in a longitudinally displaceable manner in the guide sleeve 4.
  • a second disc part 7 is provided which, in the embodiments according to FIGS. 1 and 2, merges into the hollow cylindrical wall 2 in the immediate vicinity of the first disc part 5.
  • the second disc part 7 is provided at its bore with an axially directed collar 8, the inner diameter of which is so matched to the outer diameter of the guide sleeve 4 that there is a tight fit between them.
  • FIG. 2 differs from this embodiment in that the second disk part 7 is formed in one piece with the guide sleeve 4. While the first disk part 5 extends from the lower end of the guide sleeve 4, the second disk part 7 extends from the upper end of the guide sleeve 4 inclined outwards, where it merges into the hollow cylindrical wall 2 in the immediate vicinity of the first disk part 5.
  • FIG. 3 shows a further variant in which - similar to FIG. 2 - the first disk part 5 starts from the lower end of the guide sleeve 4 and the second disk part 7 from the upper end thereof.
  • both pane parts 5 extend and 7 at right angles to the longitudinal axis of the valve tappet and merge into the hollow cylindrical wall 2 at two axially distant locations.
  • a box-shaped construction is created which has an even higher rigidity than that previously described.
  • a bore 9 is provided in the second disc part 7, through which the two partial storage spaces, which are separated by the second disc part 7, are connected to one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP87115946A 1986-11-06 1987-10-30 Poussoir de soupape à réglage hydraulique automatique Expired - Lifetime EP0266685B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863637906 DE3637906A1 (de) 1986-11-06 1986-11-06 Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE3637906 1986-11-06

Publications (2)

Publication Number Publication Date
EP0266685A1 true EP0266685A1 (fr) 1988-05-11
EP0266685B1 EP0266685B1 (fr) 1990-12-05

Family

ID=6313352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115946A Expired - Lifetime EP0266685B1 (fr) 1986-11-06 1987-10-30 Poussoir de soupape à réglage hydraulique automatique

Country Status (5)

Country Link
US (1) US4825823A (fr)
EP (1) EP0266685B1 (fr)
JP (1) JPS63124811A (fr)
DE (2) DE3637906A1 (fr)
ES (1) ES2019919B3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8902780U1 (de) * 1989-03-08 1989-04-20 INA Wälzlager Schaeffler KG, 8522 Herzogenaurach Sich selbsttätig hydraulisch einstellender Ventilstößel
JPH033905A (ja) * 1989-05-16 1991-01-10 Volkswagen Ag <Vw> 上下動弁、特に内燃機関の荷重交番弁の弁駆動装置
US5119774A (en) * 1990-11-08 1992-06-09 General Motors Corporation Direct acting hydraulic valve lifter
US5245958A (en) * 1990-11-08 1993-09-21 General Motors Corporation Direct acting hydraulic valve lifter
DE19614668A1 (de) * 1996-04-13 1997-10-16 Schaeffler Waelzlager Kg Hydraulisches Abstützelement für eine Ventilsteuerung einer Brennkraftmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2758957A1 (de) * 1977-12-30 1979-07-05 Wizemann Gmbh U Co J Hydraulischer tassenstoessel
GB2156471A (en) * 1984-03-31 1985-10-09 Motomak A cup-shaped casing for a self-adjusting hydraulic tappet for overhead camshaft internal combustion engines and a method of producing the casing
EP0179323A1 (fr) * 1984-10-12 1986-04-30 INA Wälzlager Schaeffler KG Poussoir de soupape à réglage hydraulique automatique
DE3432438C1 (de) * 1984-09-04 1986-05-22 Daimler-Benz Ag, 7000 Stuttgart Tassenstößel mit hydraulischem Spielausgleich für ein Gaswechselventil einer Brennkraftmaschine
EP0224666A1 (fr) * 1985-11-29 1987-06-10 INA Wälzlager Schaeffler KG Poussoir de soupape à autoréglage hydraulique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935751A1 (de) * 1979-09-05 1981-03-12 Fritz Gotthold 6453 Seligenstadt Rottluff Spielausgleich-stoessel mit selbstentlueftung.
DE3412175A1 (de) * 1984-03-31 1985-10-10 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Tassenfoermiges gehaeuse eines sich selbsttaetig hydraulisch einstellenden ventilstoessels fuer brennkraftmaschinen mit obenliegender nockenwelle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2758957A1 (de) * 1977-12-30 1979-07-05 Wizemann Gmbh U Co J Hydraulischer tassenstoessel
GB2156471A (en) * 1984-03-31 1985-10-09 Motomak A cup-shaped casing for a self-adjusting hydraulic tappet for overhead camshaft internal combustion engines and a method of producing the casing
DE3432438C1 (de) * 1984-09-04 1986-05-22 Daimler-Benz Ag, 7000 Stuttgart Tassenstößel mit hydraulischem Spielausgleich für ein Gaswechselventil einer Brennkraftmaschine
EP0179323A1 (fr) * 1984-10-12 1986-04-30 INA Wälzlager Schaeffler KG Poussoir de soupape à réglage hydraulique automatique
EP0224666A1 (fr) * 1985-11-29 1987-06-10 INA Wälzlager Schaeffler KG Poussoir de soupape à autoréglage hydraulique

Also Published As

Publication number Publication date
JPH0343441B2 (fr) 1991-07-02
US4825823A (en) 1989-05-02
JPS63124811A (ja) 1988-05-28
DE3637906A1 (de) 1988-05-19
EP0266685B1 (fr) 1990-12-05
DE3766598D1 (de) 1991-01-17
ES2019919B3 (es) 1991-07-16

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