EP0209697A1 - Plaquette de réglage de jeu pour soupape - Google Patents

Plaquette de réglage de jeu pour soupape Download PDF

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Publication number
EP0209697A1
EP0209697A1 EP86107809A EP86107809A EP0209697A1 EP 0209697 A1 EP0209697 A1 EP 0209697A1 EP 86107809 A EP86107809 A EP 86107809A EP 86107809 A EP86107809 A EP 86107809A EP 0209697 A1 EP0209697 A1 EP 0209697A1
Authority
EP
European Patent Office
Prior art keywords
valve
plate
cam
adjusting plate
adjusting pad
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.)
Withdrawn
Application number
EP86107809A
Other languages
German (de)
English (en)
Inventor
Manfred Loos
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.)
Stettner and Co
Original Assignee
Stettner and Co
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 Stettner and Co filed Critical Stettner and Co
Publication of EP0209697A1 publication Critical patent/EP0209697A1/fr
Withdrawn legal-status Critical Current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
    • F01L1/205—Adjusting or compensating clearance by means of shims or the like
    • 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
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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
    • F02F7/0087—Ceramic materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/20—SOHC [Single overhead camshaft]

Definitions

  • the invention relates to a valve timing plate for internal combustion engines, which is arranged above the valve lifter and is acted upon by the control cam.
  • valves which release or shut off the inlet and outlet lines in relation to the cylinder space in accordance with the working cycle of the engine.
  • the valve disk is pressed against the valve seat on the cylinder head under spring force, and they are driven by cams arranged on the camshaft, in order to achieve good filling and rapid emptying of the cylinder, the fastest possible opening and closing of the valves is essential.
  • the valve is suddenly accelerated to a high speed by the action of the control cam on the valve tappet, resulting in a strong impact. With this acceleration up to the maximum value of the speed, there is direct contact between the cam and the acted valve element.
  • the course of movement is largely determined by the shape of the cam.
  • the wear of the adjusting plate is also dependent on the shape of the cam, so that for the reasons given certain compromises have to be made which are at the expense of the valve clearance and thus the engine performance. This results in a need for a remedy beyond the complex application of hard metal on valve setting plates, on the one hand in order to achieve the optimal operating conditions of the valve control, and on the other hand to keep wear as low as possible.
  • the invention addresses these problems and, in order to solve this problem, proposes to design the valve timing plate from a fired ceramic material with a polished surface when controlling the valve of an internal combustion engine.
  • This ceramic plate replaces the previously used metal valve adjusting plate guided by a guide sleeve bearing against the valve tappet by a ceramic plate of high surface quality.
  • the surface can be lapped, ground or polished.
  • Such a material is known to be distinguished by high compressive strength as well as long-term impact stress.
  • the wear of such a valve adjusting plate made of a ceramic material is significantly less than that of the usual metal plates.
  • the cams can be provided with an optimal shape, so that the control times can also be optimized and thereby the opening and closing process can be influenced in a sense that the Engine performance noticeably influenced.
  • Ceramic mixtures of various types are suitable for the inventive design of a valve timing plate made of ceramic material, the permanent impact strength being from is of crucial importance.
  • the surface coating of such valve timing plates can be adapted to the respective requirements in a comparatively wide range.
  • the drawing shows the arrangement of a hanging valve controlled above.
  • This consists of the valve tappet 1 with the valve plate 3 interacting with the valve seat 2.
  • the tappet 1 is guided in a bush 4 which has a plate 5 on which the valve spring 6 is supported, the other end of which rests on the plate 7.
  • the cam-side end of the valve tappet 1 is encompassed by a guide sleeve 8, the outer edge 9 of which extends beyond the surface 10 and serves to guide the valve adjusting plate 11, which rests freely rotatably on the surface 10 within the projecting edge 9.
  • a number of cams 13 corresponding to the number of valves to be controlled are arranged, which act once on the valve setting plate 11 with each revolution of the shaft 12 and, via this and the guide sleeve 8, accelerate the valve tappet 1 and the valve disk 3 to the maximum and at retard the opposite movement accordingly, so that the valve plate 3 lifts off the valve seat 2 in a very short time and then comes back to the system.
  • the valve adjusting plate 11 consists of a fired ceramic material, the surface 15 of which is ground, polished and / or lapped, so that the lowest possible amount of friction results between the cam 13 and the surface 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP86107809A 1985-06-22 1986-06-07 Plaquette de réglage de jeu pour soupape Withdrawn EP0209697A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3522403 1985-06-22
DE19853522403 DE3522403A1 (de) 1985-06-22 1985-06-22 Ventileinstellplatte

Publications (1)

Publication Number Publication Date
EP0209697A1 true EP0209697A1 (fr) 1987-01-28

Family

ID=6273927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86107809A Withdrawn EP0209697A1 (fr) 1985-06-22 1986-06-07 Plaquette de réglage de jeu pour soupape

Country Status (2)

Country Link
EP (1) EP0209697A1 (fr)
DE (1) DE3522403A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0523691A3 (en) * 1991-07-19 1993-03-03 Sumitomo Electric Industries, Ltd. Ceramic adjusting shim
EP0577877A1 (fr) * 1991-09-04 1994-01-12 Sumitomo Electric Industries, Ltd. Cale de réglage
WO1997005367A1 (fr) * 1995-07-27 1997-02-13 INA Wälzlager Schaeffler oHG Poussoir mecanique de cloche pour mecanisme de distribution d'un moteur a combustion interne
EP0953733A3 (fr) * 1998-04-30 2000-08-02 Sumitomo Electric Industries, Ltd. Pièce de frottement pour un dispositif à frottement

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938283A1 (de) * 1979-09-21 1981-04-02 Audi Nsu Auto Union Ag, 7107 Neckarsulm Vorrichtung zum steuern der gaswechselventile einer brennkraftmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1165446A (en) * 1966-09-19 1969-10-01 Fiat Spa Valve Tappet
AU1797383A (en) * 1982-09-30 1984-04-05 Stanadyne Inc. Tappet with ceramic camface

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938283A1 (de) * 1979-09-21 1981-04-02 Audi Nsu Auto Union Ag, 7107 Neckarsulm Vorrichtung zum steuern der gaswechselventile einer brennkraftmaschine

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
AUTOMOTIVE ENGINEERING, Band 92, Nr. 12, Dezember 1984, Seiten 77-81, Warrendale, Pennsylvania, US; D. SCOTT et al.: "Advanced ceramic bids for engine parts" *
MOTORTECHNISCHE ZEITSCHRIFT, Band 44, Nr. 6, Juni 1983, Seiten 225-229, Stuttgart, DE; P. WALZER et al.: "Hochtemperaturkeramik für Verbrennungskraftmaschinen" *
MOTORTECHNISCHE ZEITSCHRIFT, Band 46, Nr. 5, Mai 1985, Seiten 155-160, Stuttgart, DE; P. WALZER et al.: "Alternative Werkstoffe für Automobilantriebe" *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0523691A3 (en) * 1991-07-19 1993-03-03 Sumitomo Electric Industries, Ltd. Ceramic adjusting shim
EP0577877A1 (fr) * 1991-09-04 1994-01-12 Sumitomo Electric Industries, Ltd. Cale de réglage
WO1997005367A1 (fr) * 1995-07-27 1997-02-13 INA Wälzlager Schaeffler oHG Poussoir mecanique de cloche pour mecanisme de distribution d'un moteur a combustion interne
US5884595A (en) * 1995-07-27 1999-03-23 Ina Walzlager Schaeffler Ohg Mechanical cup pushrod for an internal combustion engine's valve gear
EP0953733A3 (fr) * 1998-04-30 2000-08-02 Sumitomo Electric Industries, Ltd. Pièce de frottement pour un dispositif à frottement
US6220757B1 (en) 1998-04-30 2001-04-24 Sumitomo Electric Industries, Ltd. Sliding part for a sliding mechanism

Also Published As

Publication number Publication date
DE3522403A1 (de) 1987-01-02

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Designated state(s): DE FR IT SE

17P Request for examination filed

Effective date: 19870122

17Q First examination report despatched

Effective date: 19871028

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19881130

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LOOS, MANFRED