EP0266685B1 - Sich selbsttätig hydraulisch einstellender Ventilstössel - Google Patents

Sich selbsttätig hydraulisch einstellender Ventilstössel Download PDF

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Publication number
EP0266685B1
EP0266685B1 EP87115946A EP87115946A EP0266685B1 EP 0266685 B1 EP0266685 B1 EP 0266685B1 EP 87115946 A EP87115946 A EP 87115946A EP 87115946 A EP87115946 A EP 87115946A EP 0266685 B1 EP0266685 B1 EP 0266685B1
Authority
EP
European Patent Office
Prior art keywords
guide sleeve
valve tappet
disk member
cylindrical wall
hollow cylindrical
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 - Lifetime
Application number
EP87115946A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0266685A1 (de
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/de
Application granted granted Critical
Publication of EP0266685B1 publication Critical patent/EP0266685B1/de
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 up, and in which a concentric to the hollow cylindrical wall guide sleeve is arranged, which opens at its end facing away from the bottom in the center of a disc part, which supports the guide sleeve at least in the radial direction and with its outer circumference merges into the hollow cylindrical wall of the housing and with the wall (2) is connected, and which guide sleeve is at its other end at a distance from the floor, the actual hydraulic play compensation element being guided in a longitudinally displaceable manner in the guide sleeve.
  • valve tappets are, for example, from GB-PS 21 56 471. These essentially also meet the requirements placed on them.
  • the valve lifters are particularly required to have the lowest possible mass. This leads to designs with ever smaller wall thicknesses, which leads to vibrations in the high-frequency accelerations and decelerations that occur in operation, which under unfavorable conditions can lead to fractures and the 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 the guide sleeve and the disk part also have to be made thinner to reduce the mass of the valve tappet, this results in a critical situation from the point of view of vibration technology.
  • Cup tappets are known from EP-A 179 323 and EP-A 224 666, in which the guide sleeve is stabilized by extending the guide sleeve to the bottom of the housing and connecting the guide sleeve to the inside of the housing base.
  • these solutions are only suitable to a limited extent because, in particular, the connection to the cup base is located in a zone that is problematic in terms of vibration and the guide sleeve is not supported in the critical vibration range.
  • the invention has for its object to achieve such a stiffening of the housing with simple technical means that even with reduced wall thicknesses damage that is due to vibrations is not to be expected.
  • 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 a mutual distance almost at right angles to the longitudinal axis of the valve lifter and can 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 starting 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 disk parts 5 and 7 extend outwards at right angles to the longitudinal axis of the valve tappet and merge into the hollow cylindrical wall 2 at two axially distant locations. In this way, 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 Sich selbsttätig hydraulisch einstellender Ventilstössel Expired - Lifetime EP0266685B1 (de)

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 EP0266685A1 (de) 1988-05-11
EP0266685B1 true EP0266685B1 (de) 1990-12-05

Family

ID=6313352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115946A Expired - Lifetime EP0266685B1 (de) 1986-11-06 1987-10-30 Sich selbsttätig hydraulisch einstellender Ventilstössel

Country Status (5)

Country Link
US (1) US4825823A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0266685B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS63124811A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE3637906A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES2019919B3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (10)

* 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
US5245958A (en) * 1990-11-08 1993-09-21 General Motors Corporation Direct acting hydraulic valve lifter
US5119774A (en) * 1990-11-08 1992-06-09 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
US7028654B2 (en) 2002-10-18 2006-04-18 The Maclean-Fogg Company Metering socket
US6871622B2 (en) 2002-10-18 2005-03-29 Maclean-Fogg Company Leakdown plunger
US7191745B2 (en) 2002-10-18 2007-03-20 Maclean-Fogg Company Valve operating assembly
US7128034B2 (en) 2002-10-18 2006-10-31 Maclean-Fogg Company Valve lifter body
US7273026B2 (en) 2002-10-18 2007-09-25 Maclean-Fogg Company Roller follower body

Family Cites Families (7)

* 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
DE2935751A1 (de) * 1979-09-05 1981-03-12 Fritz Gotthold 6453 Seligenstadt Rottluff Spielausgleich-stoessel mit selbstentlueftung.
DE3412176A1 (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 und verfahren zu seiner herstellung
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
DE3432438C1 (de) * 1984-09-04 1986-05-22 Daimler-Benz Ag, 7000 Stuttgart Tassenstößel mit hydraulischem Spielausgleich für ein Gaswechselventil einer Brennkraftmaschine
DE3437478A1 (de) * 1984-10-12 1986-04-17 INA Wälzlager Schaeffler KG, 8522 Herzogenaurach Sich selbsttaetig hydraulisch einstellender ventilstoessel
DE3542192A1 (de) * 1985-11-29 1987-06-04 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel

Also Published As

Publication number Publication date
DE3637906A1 (de) 1988-05-19
DE3766598D1 (de) 1991-01-17
EP0266685A1 (de) 1988-05-11
ES2019919B3 (es) 1991-07-16
US4825823A (en) 1989-05-02
JPH0343441B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1991-07-02
JPS63124811A (ja) 1988-05-28

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