EP0247230A2 - Poussoir en forme de tasse - Google Patents

Poussoir en forme de tasse Download PDF

Info

Publication number
EP0247230A2
EP0247230A2 EP86114107A EP86114107A EP0247230A2 EP 0247230 A2 EP0247230 A2 EP 0247230A2 EP 86114107 A EP86114107 A EP 86114107A EP 86114107 A EP86114107 A EP 86114107A EP 0247230 A2 EP0247230 A2 EP 0247230A2
Authority
EP
European Patent Office
Prior art keywords
cavity
inner housing
tappet according
outer housing
tappet
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
EP86114107A
Other languages
German (de)
English (en)
Other versions
EP0247230B1 (fr
EP0247230A3 (en
Inventor
Alfred Laffter
Erich Neuthard
Klaus Schlag
Helmut Dr. Schlüter
Heinz Jansen
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
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 Carl Freudenberg KG filed Critical Carl Freudenberg KG
Priority to AT86114107T priority Critical patent/ATE51935T1/de
Publication of EP0247230A2 publication Critical patent/EP0247230A2/fr
Publication of EP0247230A3 publication Critical patent/EP0247230A3/de
Application granted granted Critical
Publication of EP0247230B1 publication Critical patent/EP0247230B1/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
    • 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
    • F01L2309/00—Self-contained lash adjusters

Definitions

  • the invention relates to a bucket tappet for an internal combustion engine, comprising an outer housing with a first cavity, a hollow piston with a second cavity arranged in the first cavity, a passage opening between the first and the second cavity, an inner housing with a third cavity arranged on the hollow piston.
  • the hollow piston and the inner housing are supported on one another by a compression spring and jointly delimit a throttle gap, a nonreturn valve which is permeable in the direction of the third hollow space being arranged between the second and the third hollow space, and wherein the through-opening, the throttle gap, the outer housing, the inner housing and the hollow piston together enclosing chamber is completely filled with incompressible liquid.
  • Cup tappets of the aforementioned type are known. They are used for automatic valve lash compensation between the upper end of the valves of internal combustion engines and the camshaft. They comprise a piston / cylinder unit arranged in the direction of loading of the respective valve, into which oil from the oil pressure circulation lubrication of the internal combustion engine is fed. The piston / cylinder unit is thereby moved apart to a length which corresponds to the distance between the upper end of the closed valve and the camshaft when the cam is not load-bearing, leakage liquid constantly leaving the piston / cylinder unit in a defined quantity through throttle gaps provided specifically for this purpose.
  • the load on the tappet caused by the cams during the valve actuation is only brief not to change the length of the piston / cylinder unit significantly. This ensures the safe closing of the valves, regardless of any wear that may have occurred.
  • the rattling noises that occur when starting the engine are, however, unsatisfactory and can lead to engine damage.
  • the invention has for its object to further develop a tappet of the aforementioned type such that rattling noises no longer occur when the internal combustion engine is started.
  • the chamber is continuously closed off from the outside by a liquid-impermeable boundary wall, and in that the boundary wall is designed as an elastically flexible bellows in at least one partial region adjacent to the first cavity.
  • the chamber of the tappet according to the invention is filled with a defined amount of a liquid and sealed off from the outside. Immediate operational readiness of the bucket tappet with the engine switched off and restarting is therefore always guaranteed. Rattling noises no longer occur.
  • the outer housing, the hollow piston and the inner housing have a common axis, that the bellows is limited by a resiliently supported ring membrane and that the ring membrane seals the inner and outer housing.
  • the diameter of the ring membrane considerably exceeds that of the inner housing, which results in minimal deformation of the ring membrane when the inner housing is axially displaced. The service life achieved is therefore considerable.
  • the ring membrane can be designed as a rolling membrane with a view to reducing the material-specific load.
  • This is expediently in contact with an annular support cage, the support cage being mounted on supporting springs which are evenly distributed over the circumference and supported on the outer housing. This ensures a particularly rapid filling of the third cavity from the second cavity via the interposed check valve, which, when the internal combustion engine is switched on, ensures that the valves which were exposed to the action of a cam during the previous engine shutdown immediately operate correctly.
  • the support cage can be of a U-shaped profile, the legs of the profile projecting, at least partially, into the intermediate zone between the suspension springs and the roller membrane. This significantly reduces the risk of damage to the roll diaphragm by the suspension springs.
  • the suspension springs are expediently designed as helical springs and are arranged parallel to the direction of movement of the inner housing. With a simple construction of the bucket tappet, this ensures a particularly long service life with good functional reliability.
  • the ring membrane can be reinforced in the areas adjacent to the inner housing and to the outer housing by stiffening rings made of metallic material. Your assembly and thus the generation of the functional unit is particularly easy with such training.
  • the cup tappet shown is used for automatic valve clearance compensation between the inlet and outlet valves of an internal combustion engine and the camshaft provided for valve actuation.
  • the bucket tappet is accordingly arranged between the upper end of the respective valve of the camshaft, a mutual overlap between its axis and the direction of force having proven to be expedient.
  • the tappet comprises the outer housing 1 with the first cavity 2, a hollow piston 3 arranged in the first cavity with the second cavity 4, a passage opening 5 between the first and the second cavity, an inner housing 6 arranged on the hollow piston 3 with a third cavity 7 , wherein the hollow piston 3 and the inner housing 6 are supported on one another by a compression spring 8 and together define an annular throttle gap 9, a non-return valve 10 which is permeable in the direction of the third cavity 7 being arranged between the second and third cavities 4, 7 and wherein is completely filled with incompressible liquid through the passage opening 5, the throttle gap 9, the outer housing 1, the inner housing 6 and the hollow piston 3.
  • the chamber is continuously closed off from the outside by a liquid-impermeable boundary wall, the boundary wall being formed in the annular gap between the outside of the inner housing 6 and the inside of the outer housing 1 by a flexible bellows.
  • the bellows has the shape of an annular roller membrane made of fabric-reinforced rubber, which is provided in the area of the inner and outer circumference with metal rings 12, 13 and is fixed by the same on the one hand to the inner housing 6 and on the other hand to the outer housing 1.
  • the rolling membrane 11 is in the intermediate zone between the two metal rings 12, 13 mounted on an underside, circular-shaped support cage with a U-shaped downward-open profile in which three support springs 14 which are evenly distributed over the circumference engage.
  • the suspension springs are mounted on the underside of the support ring 15, which is axially immovably held in the outer housing 1 by the snap ring 16.
  • the support ring 15 can thereby give the support cage 17 and thus at the same time the rolling membrane 11 good guidance in the event of axial displacements.
  • the chamber enclosed by the first cavity 2, by the passage opening 5, by the second cavity 4, by the third cavity 7 and by the throttle gap 9 is completely filled with incompressible liquid.
  • the spring elasticity of the compression spring 8 is less than that of the closing spring of the associated valve and, with respect to the liquid contained in the chamber, has the same direction of action as the supporting springs 14.
  • the third cavity 7 therefore reaches its maximum filling volume, while the outer housing 1 also low force is applied to the underside of the camshaft and the inner housing 6 with an equal force at the upper end of the associated valve. This is firmly closed by the action of the closing spring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Treating Waste Gases (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Steroid Compounds (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Cookers (AREA)
  • Food-Manufacturing Devices (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
EP86114107A 1986-05-27 1986-10-11 Poussoir en forme de tasse Expired - Lifetime EP0247230B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86114107T ATE51935T1 (de) 1986-05-27 1986-10-11 Tassenstoessel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3617858 1986-05-27
DE19863617858 DE3617858A1 (de) 1986-05-27 1986-05-27 Tassenstoessel

Publications (3)

Publication Number Publication Date
EP0247230A2 true EP0247230A2 (fr) 1987-12-02
EP0247230A3 EP0247230A3 (en) 1988-01-20
EP0247230B1 EP0247230B1 (fr) 1990-04-11

Family

ID=6301760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114107A Expired - Lifetime EP0247230B1 (fr) 1986-05-27 1986-10-11 Poussoir en forme de tasse

Country Status (10)

Country Link
US (1) US4779583A (fr)
EP (1) EP0247230B1 (fr)
JP (1) JPS62279212A (fr)
AT (1) ATE51935T1 (fr)
BR (1) BR8701709A (fr)
CA (1) CA1329523C (fr)
DE (2) DE3617858A1 (fr)
ES (1) ES2003512A6 (fr)
MX (1) MX169474B (fr)
NO (1) NO164194C (fr)

Families Citing this family (14)

* 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
GB2237858A (en) * 1989-11-11 1991-05-15 Gen Motors Luxembourg Operatio Valve-lash adjustment system.
DE4107041A1 (de) * 1991-03-06 1992-09-10 Freudenberg Carl Fa Hydraulisches spielausgleichselement fuer einen ventiltrieb
DE4125568A1 (de) * 1991-08-02 1993-02-04 Schaeffler Waelzlager Kg Hydraulischer tassenstoessel
DE4136746A1 (de) * 1991-11-08 1993-05-13 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellendes spielausgleichselement
DE4203897C2 (de) * 1992-02-11 1994-01-27 Freudenberg Carl Fa Hydraulisches Ventilspielausgleichselement
DE4209245A1 (de) * 1992-03-21 1993-09-23 Schaeffler Waelzlager Kg Sich selbsttaetig hydraulisch einstellender ventilstoessel
US5584268A (en) * 1994-12-27 1996-12-17 Ford Motor Company Low inertia rocker arm with lash adjuster and engine valve
US6723451B1 (en) * 2000-07-14 2004-04-20 3M Innovative Properties Company Aluminum matrix composite wires, cables, and method
US7273026B2 (en) 2002-10-18 2007-09-25 Maclean-Fogg Company Roller follower body
US7028654B2 (en) 2002-10-18 2006-04-18 The Maclean-Fogg Company Metering socket
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
US6871622B2 (en) 2002-10-18 2005-03-29 Maclean-Fogg Company Leakdown plunger

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA504132A (fr) * 1954-07-06 Oldberg Sidney Came hydraulique independante
US4397271A (en) * 1981-03-02 1983-08-09 Stanadyne, Inc. Semi-self-contained hydraulic lash adjuster
JPS6010810U (ja) * 1983-07-04 1985-01-25 小田井鉄工株式会社 内燃機関用動弁機構の密閉型直座式油圧リフタ−
DE3347670A1 (de) * 1983-12-31 1985-07-11 Jörg 4800 Bielefeld Schwarzbich Hydraulischer ventilstoessel
IT8467294A0 (it) * 1984-03-27 1984-03-27 Riv Officine Di Villar Perosa Punteria idraulica per il comando del moto di una valvola di un motore endotermico
IT1180083B (it) * 1984-07-24 1987-09-23 Riv Officine Di Villar Perosa Punteria idraulica a tenuta stagna per il comando del moto di una valvola di un motore endotermico
IT8454108U1 (it) * 1984-12-04 1986-06-04 Riv Skf Officine Di Villar Perosa S P A Punteria idraulica a tenuta stagna per il comando del moto di una valvola di un motore endotermico.
DE3506730A1 (de) * 1985-02-26 1986-04-17 Daimler-Benz Ag, 7000 Stuttgart Hydraulisches ventilspielausgleichselement fuer brennkraftmaschinen
DE3511501A1 (de) * 1985-03-29 1986-10-09 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Hydraulischer tassenstoessel fuer verbrennungsmotoren
DE3513161A1 (de) * 1985-04-12 1986-10-16 Goetze Ag, 5093 Burscheid Ventilspielausgleichseinrichtung

Also Published As

Publication number Publication date
NO164194B (no) 1990-05-28
NO864505D0 (no) 1986-11-12
DE3670339D1 (de) 1990-05-17
ES2003512A6 (es) 1988-11-01
JPS62279212A (ja) 1987-12-04
US4779583A (en) 1988-10-25
NO864505L (no) 1987-11-30
ATE51935T1 (de) 1990-04-15
DE3617858A1 (de) 1987-12-03
DE3617858C2 (fr) 1989-05-18
EP0247230B1 (fr) 1990-04-11
NO164194C (no) 1990-09-05
EP0247230A3 (en) 1988-01-20
CA1329523C (fr) 1994-05-17
MX169474B (es) 1993-07-07
BR8701709A (pt) 1988-01-26
JPH0553926B2 (fr) 1993-08-11

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