EP1239124A3 - Deactivable tappet for transmission of cam lift on a pushrod - Google Patents

Deactivable tappet for transmission of cam lift on a pushrod Download PDF

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Publication number
EP1239124A3
EP1239124A3 EP02001305A EP02001305A EP1239124A3 EP 1239124 A3 EP1239124 A3 EP 1239124A3 EP 02001305 A EP02001305 A EP 02001305A EP 02001305 A EP02001305 A EP 02001305A EP 1239124 A3 EP1239124 A3 EP 1239124A3
Authority
EP
European Patent Office
Prior art keywords
tappet
transmission
deactivable
pushrod
cam lift
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
EP02001305A
Other languages
German (de)
French (fr)
Other versions
EP1239124A2 (en
EP1239124B1 (en
Inventor
Michael Haas
Martin Rauch
Henning Karbstein
Dieter Schmidt
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 EP1239124A2 publication Critical patent/EP1239124A2/en
Publication of EP1239124A3 publication Critical patent/EP1239124A3/en
Application granted granted Critical
Publication of EP1239124B1 publication Critical patent/EP1239124B1/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
    • F01L1/146—Push-rods
    • 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
    • F01L13/0005—Deactivating valves
    • 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
    • F01L13/0031—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 by modification of tappet or pushrod length
    • 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
    • F01L2305/00—Valve arrangements comprising rollers

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)
  • Actuator (AREA)

Abstract

Vorgeschlagen ist ein schaltbarer Stößel (1) zur direkten Übertragung eines Nockenhubes auf eine Stößelstange. Der Stößel (1) hat ein hydraulisches Spielausgleichselement (31) und besitzt gegenüber dem Stand der Technik eine hervorragende hydraulische Steifigkeit. Diese ist durch einen radial sehr weit nach außen gelegt Leckspalt erzielt. Er befindet sich unmittelbar zwischen einem Gehäuse (2) und einem Druckkolben (4), welcher wiederum ein Innenelement (11) umschließt, das auf eine Stößelstange einwirkt.

Figure 00000001
A switchable tappet (1) is proposed for the direct transmission of a cam stroke to a tappet rod. The tappet (1) has a hydraulic lash adjuster (31) and has excellent hydraulic rigidity compared to the prior art. This is achieved by a leakage gap that is placed radially very far outwards. It is located directly between a housing (2) and a pressure piston (4), which in turn encloses an inner element (11) which acts on a push rod.
Figure 00000001
EP02001305A 2001-03-09 2002-01-18 Deactivable tappet for transmission of cam lift on a pushrod Expired - Lifetime EP1239124B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10111511 2001-03-09
DE10111511A DE10111511A1 (en) 2001-03-09 2001-03-09 Switchable tappet for direct transmission of a cam stroke to a tappet rod

Publications (3)

Publication Number Publication Date
EP1239124A2 EP1239124A2 (en) 2002-09-11
EP1239124A3 true EP1239124A3 (en) 2003-01-08
EP1239124B1 EP1239124B1 (en) 2003-12-03

Family

ID=7676950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02001305A Expired - Lifetime EP1239124B1 (en) 2001-03-09 2002-01-18 Deactivable tappet for transmission of cam lift on a pushrod

Country Status (3)

Country Link
EP (1) EP1239124B1 (en)
DE (2) DE10111511A1 (en)
ES (1) ES2211832T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11187119B2 (en) 2019-09-16 2021-11-30 Eaton Intelligent Power Limited Latch pin for use in valve lifter and valve lifter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB574852A (en) * 1943-03-10 1946-01-23 Gen Motors Corp Improved hydraulic valve tappet for internal combustion engines
DE950515C (en) * 1954-02-18 1956-10-11 Maschf Augsburg Nuernberg Ag Hydraulic lash adjuster
US2887996A (en) * 1957-10-28 1959-05-26 Wood George Hydraulic lash adjusters
US2942595A (en) * 1958-04-09 1960-06-28 Johnson Products Inc Hydraulic tappet
DE19844202A1 (en) * 1998-09-26 2000-03-30 Schaeffler Waelzlager Ohg Internal combustion engine valve tappet comprises inner and outer section coupled and decoupled via spring-powered slide in section mountings to maximize or zero gas valve stroke
US6196175B1 (en) * 1999-02-23 2001-03-06 Eaton Corporation Hydraulically actuated valve deactivating roller follower

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5361733A (en) * 1993-01-28 1994-11-08 General Motors Corporation Compact valve lifters
DE4442057B4 (en) * 1994-11-25 2005-07-28 Ina-Schaeffler Kg Hydraulic lash adjuster
DE19947848A1 (en) * 1998-10-28 2000-05-04 Fev Motorentech Gmbh Actuator for operating gas exchange valve in internal combustion engine has length compensated coupling element between control elements

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB574852A (en) * 1943-03-10 1946-01-23 Gen Motors Corp Improved hydraulic valve tappet for internal combustion engines
DE950515C (en) * 1954-02-18 1956-10-11 Maschf Augsburg Nuernberg Ag Hydraulic lash adjuster
US2887996A (en) * 1957-10-28 1959-05-26 Wood George Hydraulic lash adjusters
US2942595A (en) * 1958-04-09 1960-06-28 Johnson Products Inc Hydraulic tappet
DE19844202A1 (en) * 1998-09-26 2000-03-30 Schaeffler Waelzlager Ohg Internal combustion engine valve tappet comprises inner and outer section coupled and decoupled via spring-powered slide in section mountings to maximize or zero gas valve stroke
US6196175B1 (en) * 1999-02-23 2001-03-06 Eaton Corporation Hydraulically actuated valve deactivating roller follower

Also Published As

Publication number Publication date
DE50200120D1 (en) 2004-01-15
EP1239124A2 (en) 2002-09-11
ES2211832T3 (en) 2004-07-16
EP1239124B1 (en) 2003-12-03
DE10111511A1 (en) 2002-10-24

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