EP1260681A3 - Valve tappet - Google Patents

Valve tappet Download PDF

Info

Publication number
EP1260681A3
EP1260681A3 EP02009906A EP02009906A EP1260681A3 EP 1260681 A3 EP1260681 A3 EP 1260681A3 EP 02009906 A EP02009906 A EP 02009906A EP 02009906 A EP02009906 A EP 02009906A EP 1260681 A3 EP1260681 A3 EP 1260681A3
Authority
EP
European Patent Office
Prior art keywords
bottom part
cam
inside wall
inner part
outer circumference
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
EP02009906A
Other languages
German (de)
French (fr)
Other versions
EP1260681A2 (en
EP1260681B1 (en
Inventor
Michael Haas
Dieter Schmidt
Walter Speil
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.)
IHO Holding GmbH and Co KG
Original Assignee
INA Schaeffler 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 INA Schaeffler KG filed Critical INA Schaeffler KG
Publication of EP1260681A2 publication Critical patent/EP1260681A2/en
Publication of EP1260681A3 publication Critical patent/EP1260681A3/en
Application granted granted Critical
Publication of EP1260681B1 publication Critical patent/EP1260681B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F01L1/12—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
    • F01L1/20—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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • 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
    • F01L2307/00—Preventing the rotation of tappets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve a tappet of such a type that an outer side part 8 and an inner part 7 are relatively slidable in the tappet operation direction and that a bottom part 2 of the outer part can be loaded by two outer cams and that a bottom part 3 of the inner part can be loaded by an inner cam arranged between the two outer cams and that the bottom part 3 of the inner part provided with a circular contour shape includes a flat parts 4 faced to an opposite side each other for releasing the outer cam at an outer circumference part thereof and that an arc section is formed on an outer circumference part of the bottom part 3 of the inner part between the flat parts 4, for simplifying manufacturing thereof. SOLUTION: An inside wall part 14 of the bottom part 2 of the outer part 8 forms a circular notch 15 crossing a cam contact line of the outer cam. The bottom part 3 of the inner part 7 is arranged in the notch 15. The arc section 13 provided on the outer circumference part side of the bottom part 3 of the inner part 7 is arranged in a position coaxial to the inside wall part 14 with maintaining small space in the radius direction to the inside wall part 14.
EP02009906A 2001-05-17 2002-05-03 Valve tappet Expired - Lifetime EP1260681B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10123963 2001-05-17
DE10123963A DE10123963A1 (en) 2001-05-17 2001-05-17 Tappet for valve drive has two opposite flat spots on inner head part to free outer cams

Publications (3)

Publication Number Publication Date
EP1260681A2 EP1260681A2 (en) 2002-11-27
EP1260681A3 true EP1260681A3 (en) 2003-01-08
EP1260681B1 EP1260681B1 (en) 2004-03-03

Family

ID=7685090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02009906A Expired - Lifetime EP1260681B1 (en) 2001-05-17 2002-05-03 Valve tappet

Country Status (4)

Country Link
EP (1) EP1260681B1 (en)
JP (1) JP2002349213A (en)
AT (1) ATE261055T1 (en)
DE (2) DE10123963A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7401584B2 (en) 2004-07-01 2008-07-22 Schaeffler Kg Adjustable engine
DE102004056457A1 (en) 2004-11-23 2006-06-08 Schaeffler Kg Cup tappets for an internal combustion engine
DE102005017409A1 (en) * 2005-04-15 2006-10-19 Schaeffler Kg Outer part of a switchable tappet
DE102005049774A1 (en) * 2005-10-18 2007-04-19 Robert Bosch Gmbh Device for actuating a gas exchange valve of an internal combustion engine
DE102017109017A1 (en) 2017-04-27 2018-10-31 Schaeffler Technologies AG & Co. KG Internal combustion engine and method of controlling the intake air flow rate of a combustion piston engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0353543A1 (en) * 1988-08-03 1990-02-07 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Valve-operating device for internal-combustion engines
EP0608925A1 (en) * 1993-01-28 1994-08-03 General Motors Corporation Compact valve-lifters
US5555861A (en) * 1992-04-27 1996-09-17 Iav Motor Gmbh Drive for gas exchange valves, preferably inlet valves for reciprocating internal combustion engines
US5651335A (en) * 1993-05-04 1997-07-29 Ina Walzlager Schaeffler Kg Valve tappet
DE19652180A1 (en) * 1996-12-14 1998-06-18 Schaeffler Waelzlager Ohg Tappet for a valve train of an internal combustion engine
EP0857860A1 (en) * 1997-02-06 1998-08-12 General Motors Corporation Narrow cam two-step lifter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0515520B2 (en) * 1990-02-16 1998-04-29 Group Lotus Limited Valve control means
DE4244287C2 (en) * 1992-04-27 2001-12-13 Iav Motor Gmbh Valve train for charge exchange valves, preferably intake valves of reciprocating internal combustion engines
DE4213856C2 (en) * 1992-04-27 1994-08-04 Iav Motor Gmbh Valve train for charge exchange valves, of reciprocating piston internal combustion engines
DE4337330C2 (en) * 1993-11-02 1996-03-21 Iav Motor Gmbh Roller tappet with two rollers per valve for valve drives of internal combustion engines with an overhead camshaft
JP3310490B2 (en) * 1994-10-27 2002-08-05 株式会社ユニシアジェックス Valve train for internal combustion engine
DE19502332A1 (en) * 1995-01-26 1996-08-01 Schaeffler Waelzlager Kg Drive for valve mechanism in IC engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0353543A1 (en) * 1988-08-03 1990-02-07 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Valve-operating device for internal-combustion engines
US5555861A (en) * 1992-04-27 1996-09-17 Iav Motor Gmbh Drive for gas exchange valves, preferably inlet valves for reciprocating internal combustion engines
EP0608925A1 (en) * 1993-01-28 1994-08-03 General Motors Corporation Compact valve-lifters
US5651335A (en) * 1993-05-04 1997-07-29 Ina Walzlager Schaeffler Kg Valve tappet
DE19652180A1 (en) * 1996-12-14 1998-06-18 Schaeffler Waelzlager Ohg Tappet for a valve train of an internal combustion engine
EP0857860A1 (en) * 1997-02-06 1998-08-12 General Motors Corporation Narrow cam two-step lifter

Also Published As

Publication number Publication date
EP1260681A2 (en) 2002-11-27
ATE261055T1 (en) 2004-03-15
EP1260681B1 (en) 2004-03-03
DE10123963A1 (en) 2002-11-21
JP2002349213A (en) 2002-12-04
DE50200267D1 (en) 2004-04-08

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