WO1986005238A1 - Poussoir en couronne pour commande de soupapes de moteurs a combustion - Google Patents

Poussoir en couronne pour commande de soupapes de moteurs a combustion Download PDF

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Publication number
WO1986005238A1
WO1986005238A1 PCT/DE1986/000077 DE8600077W WO8605238A1 WO 1986005238 A1 WO1986005238 A1 WO 1986005238A1 DE 8600077 W DE8600077 W DE 8600077W WO 8605238 A1 WO8605238 A1 WO 8605238A1
Authority
WO
WIPO (PCT)
Prior art keywords
resins
tappet
cup
base plate
tappet according
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.)
Ceased
Application number
PCT/DE1986/000077
Other languages
German (de)
English (en)
Inventor
Wilfried Aichele
Peter Baur
Detlef Guhl
Ewald TRÄNKLE
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO1986005238A1 publication Critical patent/WO1986005238A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F02F7/0085—Materials for constructing engines or their parts
    • 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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/16—Fibres

Definitions

  • the invention is based on a tappet with hydraulic adjusting element according to the preamble of the main claim.
  • the valve train of internal combustion engines and thus the cup tappet are usually made of steel. Steel has a high specific weight, so that there is a limit to an increase in the speeds or an increase in the valve opening and closing speeds, particularly with oscillating masses such as are present in the valve train.
  • the tappet according to the invention with the characterizing features of the main claim has the advantage that it has a much lower mass, which allows higher speeds and higher valve opening and closing speeds and thus leads to a higher efficiency of the engine.
  • the reduction in the oscillating mass of a part on the valve train enables the reduction in the oscillating mass of other parts. This leads to the reduction in the mass of the cup shock for the use of softer and thus lighter valve springs.
  • steel has a density of about 8 g / cm 3
  • the densities of the short-fiber-reinforced synthetic resin materials used are between 1.4 and 1.9 g / cm 3 , which means that the oscillating mass on the tappet is 1/3 to 1/2 can be reduced.
  • the cup tappet according to the invention is characterized by lower manufacturing costs in a plastic-appropriate design, since the previously used steel part made of solid material has to be rotated and ground.
  • FIG. 1 shows a section through a first exemplary embodiment, in which the oil supply to the adjusting element is provided by the cam
  • FIG. 2 shows a second exemplary embodiment, in which the oil supply takes place via steel tubes built into the tappet.
  • the cup pusher according to FIG. 1 consists of the molded part 1 produced by injection molding or pressing and made of short fiber-reinforced synthetic resin, for example polybismaleinimide, and contains approximately 50% by weight of glass fibers with a length from 0.5 to 6 mm.
  • the proportions of resin, fibrous and non-fibrous fillers such.
  • B. micro-hollow glass spheres must be adjusted so that the thermal expansion coefficient of the mass corresponds approximately to that of the cylinder head material - generally aluminum. However, this must be determined by appropriate tests.
  • the side walls of the molded part 1 run in corresponding sockets of the cylinder head 2.
  • the molded part 1 Since the material of the molded part 1 does not withstand the forces exerted by the cams 3 and the hydraulic adjusting element part 6, the molded part 1 carries a base plate 4, which is made of steel or a fiber composite material containing 60% by volume long carbon fibers with the orientation 0 ° / 90 °.
  • the base plate 4 can also consist of the combination of these two materials in sandwich form.
  • a steel cup 5 is movably fitted, which, like the piston 6 running in the steel cup, is part of the hydraulic adjusting element.
  • the cup space 7 is separated from the oil storage space 8 by a check valve 9.
  • the base plate 4 Above the oil reservoir 8, the base plate 4 has a bore 10 so that the oil wedge 11 is pressed into the bore 10 by the cam 3 and thus supplies the oil reservoir 8 with oil.
  • the bore 10 can be separated from the oil reservoir 8 by a further check valve 12, but this is not always necessary.
  • Countersunk pockets 13 in the base plate 4 serve to supply oil to the cavity 14 which is present between the molded part 1, the steel cup 5 and the piston 6.
  • the steel cup 5 presses its bottom onto the valve stem 15, which in turn is rigidly connected to the valve, not shown.
  • the base plate 4 is glued to the molded part 1, so that there is an adhesive joint 16 between the two.
  • the function of the bucket tappet with the hydraulic adjusting element is known per se and will not be explained in more detail here, since it is not part of the invention.
  • the embodiment of Figure 2 is largely identical to that of Figure 1, only the oil supply to the hydraulic adjusting element 5, 6 is solved differently.
  • the oil passes through an oil supply bore 17 in the cylinder head and a circumferential lubrication groove 18 through steel tubes 19 into the cavity 14, from there via the recessed pockets 13 in the oil reservoir 8 and from there, finally, as in the exemplary embodiment according to FIG. 1, via the check valve 9 into the cup space 7.
  • the tubes 19 can be glued into the molded part 1 after the corresponding holes have been drilled, but they can also be injected or pressed in with a more complex tool during the manufacture of the tappets.

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)

Abstract

Un poussoir en couronne avec élément hydraulique de réglage est utilisé pour la commande de soupapes de moteurs à combustion. Le poussoir en couronne se compose d'une masse de résine artificielle duroplastique ou thermoplastique renforcée par des fibres courtes, et présente sur la face tournée vers la came une plaque inférieure plus dure et résistante. L'alimentation en huile de l'élément hydraulique de réglage (5, 6) se fait soit à l'aide de la came (3) par un orifice (10) percé dans la plaque inférieure (4), soit par de petits conduits en acier (19) collés ou pressés dans des orifices correspondants du préformé (1). Le poussoir en couronne présente une masse sensiblement inférieure à celle des poussoirs antérieurs fabriqués en acier, et rend donc possibles des vitesses de rotation supérieures et des temps plus courts de commande des soupapes, en augmentant ainsi l'efficacité du moteur.
PCT/DE1986/000077 1985-03-05 1986-02-28 Poussoir en couronne pour commande de soupapes de moteurs a combustion Ceased WO1986005238A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3507683.6 1985-03-05
DE19853507683 DE3507683A1 (de) 1985-03-05 1985-03-05 Tassenstoessel fuer ventiltriebe von verbrennungsmotoren

Publications (1)

Publication Number Publication Date
WO1986005238A1 true WO1986005238A1 (fr) 1986-09-12

Family

ID=6264201

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1986/000077 Ceased WO1986005238A1 (fr) 1985-03-05 1986-02-28 Poussoir en couronne pour commande de soupapes de moteurs a combustion

Country Status (3)

Country Link
EP (1) EP0213162A1 (fr)
DE (2) DE3507683A1 (fr)
WO (1) WO1986005238A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007388A (en) * 1990-04-23 1991-04-16 Briggs & Stratton Corporation Hydraulic valve lifter
US5081976A (en) * 1989-06-16 1992-01-21 Mercedes-Benz Ag Bucket tappet for an internal combustion engine with overhead camshaft
EP0532294A1 (fr) * 1991-09-12 1993-03-17 Eaton Services Limited Poussoir hydraulique du type à action directe ayant un réservoir d'huile extérieur
EP0555521A1 (fr) * 1992-02-11 1993-08-18 Firma Carl Freudenberg Poussoir de soupape hydraulique
US5239953A (en) * 1992-03-03 1993-08-31 Fuji Oozx Inc. Hydraulic tappet for an internal combustion engine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3920729A1 (de) * 1989-06-24 1991-01-10 Gmb Giesserei & Maschinenbau B Tassenstoesselkoerper fuer ventilstoessel
DE4140244B4 (de) * 1990-12-19 2005-09-22 Volkswagen Ag Ventilspielausgleichsvorrichtung für ein Hubventil
DE4230227A1 (de) * 1992-09-10 1994-03-17 Porsche Ag Ventiltrieb für Brennkraftmaschinen
DE9317325U1 (de) * 1993-11-12 1994-01-05 INA Wälzlager Schaeffler KG, 91074 Herzogenaurach Stößel für einen Ventiltrieb einer Brennkraftmaschine
DE10114073A1 (de) * 2001-03-22 2002-09-26 Ina Schaeffler Kg Stößel
DE102007008573A1 (de) 2007-02-19 2008-08-21 Schaeffler Kg Schaltbarer Tassenstößel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030780A1 (fr) * 1979-12-05 1981-06-24 Eaton Corporation Pilon léger pour dispositif de valve à action directe
DE3017990A1 (de) * 1980-05-10 1981-11-12 Audi Nsu Auto Union Ag, 7107 Neckarsulm Sich selbsttaetig einstellender, hydraulischer ventilstoessel fuer eine brennkraftmaschine
US4430970A (en) * 1982-06-11 1984-02-14 Standard Oil Company (Indiana) Composite tappet
EP0140674A2 (fr) * 1983-10-28 1985-05-08 Eaton Corporation Elément d'ajustage de jeu avec une surface d'usure noyée

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3415228A1 (de) * 1984-04-21 1985-10-31 Audi AG, 8070 Ingolstadt Ventilstoessel fuer die ventilsteuerung einer brennkraftmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030780A1 (fr) * 1979-12-05 1981-06-24 Eaton Corporation Pilon léger pour dispositif de valve à action directe
DE3017990A1 (de) * 1980-05-10 1981-11-12 Audi Nsu Auto Union Ag, 7107 Neckarsulm Sich selbsttaetig einstellender, hydraulischer ventilstoessel fuer eine brennkraftmaschine
US4430970A (en) * 1982-06-11 1984-02-14 Standard Oil Company (Indiana) Composite tappet
EP0140674A2 (fr) * 1983-10-28 1985-05-08 Eaton Corporation Elément d'ajustage de jeu avec une surface d'usure noyée

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5081976A (en) * 1989-06-16 1992-01-21 Mercedes-Benz Ag Bucket tappet for an internal combustion engine with overhead camshaft
US5007388A (en) * 1990-04-23 1991-04-16 Briggs & Stratton Corporation Hydraulic valve lifter
EP0532294A1 (fr) * 1991-09-12 1993-03-17 Eaton Services Limited Poussoir hydraulique du type à action directe ayant un réservoir d'huile extérieur
EP0555521A1 (fr) * 1992-02-11 1993-08-18 Firma Carl Freudenberg Poussoir de soupape hydraulique
US5239953A (en) * 1992-03-03 1993-08-31 Fuji Oozx Inc. Hydraulic tappet for an internal combustion engine

Also Published As

Publication number Publication date
DE3507683A1 (de) 1986-09-11
DE8506244U1 (de) 1986-10-09
EP0213162A1 (fr) 1987-03-11

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