EP0523691A2 - Keramisches Spielausgleichselement - Google Patents

Keramisches Spielausgleichselement Download PDF

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Publication number
EP0523691A2
EP0523691A2 EP92112147A EP92112147A EP0523691A2 EP 0523691 A2 EP0523691 A2 EP 0523691A2 EP 92112147 A EP92112147 A EP 92112147A EP 92112147 A EP92112147 A EP 92112147A EP 0523691 A2 EP0523691 A2 EP 0523691A2
Authority
EP
European Patent Office
Prior art keywords
adjusting shim
ceramic
roughness
silicon nitride
point average
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
EP92112147A
Other languages
English (en)
French (fr)
Other versions
EP0523691A3 (en
EP0523691B1 (de
Inventor
Kenji C/O Itami Works Of Sumitomo Matsunuma
Takao C/O Itami Works Of Sumitomo Nishioka
Akira C/O Itami Works Of Sumitomo Yamakawa
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Publication of EP0523691A2 publication Critical patent/EP0523691A2/de
Publication of EP0523691A3 publication Critical patent/EP0523691A3/en
Application granted granted Critical
Publication of EP0523691B1 publication Critical patent/EP0523691B1/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
    • F01L1/205—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
    • 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
    • F01L1/16—Silencing impact; Reducing wear

Definitions

  • the same adjusting shims as shown in FIG. 1 were produced out of a silicon nitride ceramic sintered body having a relative density of not less than 98%.
  • the surface, which a cam contacts, i.e. the surface designated by a reference numeral 8 shown in FIG. 1, of each of the adjusting shims was finished under various conditions by a diamond wheel to set the roughness of the surfaces of these adjusting shims to levels shown in Table 1.
  • Each of the adjusting shims thus produced was subjected to the evaluation of power loss with respect to the power consumption of a motor rotated at a predetermined number of revolutions per minute (2000 RPM and 4000 RPM in terms of number of revolutions per minute of engine), by using a motoring system shown in FIG.
  • Table 1 shows the results of the above with the results of similar evaluation of power loss caused by conventional steel adjusting shims which constitute comparative examples.
  • Table 1 No. Material for adjusting shim Surface roughness Rz of contact surface ( ⁇ m) Power consumption of motor (kW ) 2000 RPM 4000 RPM 1 Silicon nitride 1.5 1.13 1.24 2 Silicon nitride 1.2 1.11 1.22 3 Silicon nitride 1.0 1.08 1.18 4 Silicon nitride 0.7 1.00 1.10 5 Silicon nitride 0.5 0.94 1.03 6 Silicon nitride 0.2 0.90 0.99 7 Silicon nitride 0.05 0.89 0.98 *8 Silicon nitride 2.5 1.20 1.32 *9 Silicon nitride 5.0 (not processed) 1.32 1.45 *10 Cr-Mo steel 5.0 1.17 1.28 * comparative example

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Ceramic Products (AREA)
EP19920112147 1991-07-19 1992-07-16 Keramisches Spielausgleichselement Expired - Lifetime EP0523691B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3179511A JPH08226311A (ja) 1991-07-19 1991-07-19 セラミックス製アジャスティングシム
JP179511/91 1991-07-19

Publications (3)

Publication Number Publication Date
EP0523691A2 true EP0523691A2 (de) 1993-01-20
EP0523691A3 EP0523691A3 (en) 1993-03-03
EP0523691B1 EP0523691B1 (de) 1995-11-02

Family

ID=16067078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920112147 Expired - Lifetime EP0523691B1 (de) 1991-07-19 1992-07-16 Keramisches Spielausgleichselement

Country Status (4)

Country Link
EP (1) EP0523691B1 (de)
JP (1) JPH08226311A (de)
CA (1) CA2073887C (de)
DE (1) DE69205742T2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651140A1 (de) * 1993-10-29 1995-05-03 Sumitomo Electric Industries, Ltd. Kombination einer Einstellplatte und eines Nockens
EP0675264A1 (de) * 1994-03-28 1995-10-04 Fuji Oozx Inc. Einstellplatte für Ventilstössel in einer Brennkraftmaschine
EP0682171A2 (de) * 1994-04-15 1995-11-15 Cummins Engine Company, Inc. Ventiljoch mit einer den Verschleiss verringenden Kontaktfläche
EP0617198B1 (de) * 1993-03-26 1997-07-30 Fuji Oozx Inc. Ausgleichselementstruktur für einen Ventilstössel einer Brennkraftmaschine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4493106B2 (ja) 1997-12-26 2010-06-30 富士フイルム株式会社 デジタルカメラ
US6237441B1 (en) 1998-03-19 2001-05-29 Sumitomo Electric Industries, Ltd. Combination of shim and cam

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4366785A (en) * 1980-09-19 1983-01-04 Caterpillar Tractor Co. Tappet with wear resisting insert
DE3239325A1 (de) * 1982-10-23 1984-04-26 Feldmühle AG, 4000 Düsseldorf Ventilstoessel fuer einen verbrennungsmotor
EP0209697A1 (de) * 1985-06-22 1987-01-28 Stettner & Co. Ventileinstellplatte

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4366785A (en) * 1980-09-19 1983-01-04 Caterpillar Tractor Co. Tappet with wear resisting insert
DE3239325A1 (de) * 1982-10-23 1984-04-26 Feldmühle AG, 4000 Düsseldorf Ventilstoessel fuer einen verbrennungsmotor
EP0209697A1 (de) * 1985-06-22 1987-01-28 Stettner & Co. Ventileinstellplatte

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0617198B1 (de) * 1993-03-26 1997-07-30 Fuji Oozx Inc. Ausgleichselementstruktur für einen Ventilstössel einer Brennkraftmaschine
EP0651140A1 (de) * 1993-10-29 1995-05-03 Sumitomo Electric Industries, Ltd. Kombination einer Einstellplatte und eines Nockens
US5647313A (en) * 1993-10-29 1997-07-15 Sumitomo Electric Industries, Ltd. Combination of adjusting shim and cam
EP0675264A1 (de) * 1994-03-28 1995-10-04 Fuji Oozx Inc. Einstellplatte für Ventilstössel in einer Brennkraftmaschine
EP0682171A2 (de) * 1994-04-15 1995-11-15 Cummins Engine Company, Inc. Ventiljoch mit einer den Verschleiss verringenden Kontaktfläche
EP0682171A3 (de) * 1994-04-15 1996-02-21 Cummins Engine Co Inc Ventiljoch mit einer den Verschleiss verringenden Kontaktfläche.

Also Published As

Publication number Publication date
JPH08226311A (ja) 1996-09-03
CA2073887A1 (en) 1993-01-20
CA2073887C (en) 1996-11-19
EP0523691A3 (en) 1993-03-03
EP0523691B1 (de) 1995-11-02
DE69205742D1 (de) 1995-12-07
DE69205742T2 (de) 1996-07-04

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