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WO2009003840A3 - Cam follower for a valve drive of an internal combustion engine - Google Patents

Cam follower for a valve drive of an internal combustion engine Download PDF

Info

Publication number
WO2009003840A3
WO2009003840A3 PCT/EP2008/057672 EP2008057672W WO2009003840A3 WO 2009003840 A3 WO2009003840 A3 WO 2009003840A3 EP 2008057672 W EP2008057672 W EP 2008057672W WO 2009003840 A3 WO2009003840 A3 WO 2009003840A3
Authority
WO
WIPO (PCT)
Prior art keywords
cam follower
combustion engine
internal combustion
profile
valve drive
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/EP2008/057672
Other languages
German (de)
French (fr)
Other versions
WO2009003840A2 (en
Inventor
Oliver Schnell
Helmut Engelhardt
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
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 Schaeffler KG filed Critical Schaeffler KG
Priority to EP08774123A priority Critical patent/EP2171221B1/en
Priority to AT08774123T priority patent/ATE524639T1/en
Publication of WO2009003840A2 publication Critical patent/WO2009003840A2/en
Anticipated expiration legal-status Critical
Publication of WO2009003840A3 publication Critical patent/WO2009003840A3/en
Ceased 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
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • 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
    • 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
    • F01L1/18—Rocking arms or levers
    • 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
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L2001/187—Clips, e.g. for retaining rocker arm on pivot
    • 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
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/02—Formulas

Landscapes

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

Abstract

A cam follower (2) is proposed for a valve drive (1) of an internal combustion engine with a lifting disc valve (9), to the shaft end face (8) of which at least two different valve strokes can be applied via a contact face (7) of the cam follower (2). The contact face (7) has a profile which is curved convexly in the longitudinal direction of the cam follower (2) and has at least one profile point (P0) from which two contact areas (K1, Kx), having profiles which are different from one another and are respectively adapted to one of the valve strokes, proceed. In this context, at least one of the contact areas (K1, Kx) is intended to have a profile with a continuously changing curvature, wherein the curvatures of the contact areas (K1, Kx) at the profile point (P0) are essentially of the same size.
PCT/EP2008/057672 2007-07-05 2008-06-18 Cam follower for a valve drive of an internal combustion engine Ceased WO2009003840A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08774123A EP2171221B1 (en) 2007-07-05 2008-06-18 Cam follower for a valve drive of an internal combustion engine
AT08774123T ATE524639T1 (en) 2007-07-05 2008-06-18 TRAVEL LEVER FOR A VALVE DRIVE OF AN INTERNAL COMBUSTION ENGINE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US94804107P 2007-07-05 2007-07-05
US60/948,041 2007-07-05

Publications (2)

Publication Number Publication Date
WO2009003840A2 WO2009003840A2 (en) 2009-01-08
WO2009003840A3 true WO2009003840A3 (en) 2010-02-25

Family

ID=40226569

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/057672 Ceased WO2009003840A2 (en) 2007-07-05 2008-06-18 Cam follower for a valve drive of an internal combustion engine

Country Status (3)

Country Link
EP (1) EP2171221B1 (en)
AT (1) ATE524639T1 (en)
WO (1) WO2009003840A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014116791A1 (en) 2014-11-17 2016-05-19 Volkswagen Ag Cam follower and equipped with such a cam follower internal combustion engine
DE102020111773A1 (en) 2020-04-30 2021-11-04 Schaeffler Technologies AG & Co. KG Lever for a valve train of an internal combustion engine
DE102020111775A1 (en) 2020-04-30 2021-11-04 Schaeffler Technologies AG & Co. KG Lever for a valve train of an internal combustion engine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502426A (en) * 1982-05-17 1985-03-05 Skelley James H Variable valve lift and timing mechanism
JPS6116202A (en) * 1984-07-03 1986-01-24 Honda Motor Co Ltd Valve rocker arm device of internal-combustion engine
FR2643676A1 (en) * 1989-02-28 1990-08-31 Peugeot Rocker for actuating a poppet valve of an internal combustion engine
DE4244326A1 (en) * 1992-12-28 1994-06-30 Kloeckner Humboldt Deutz Ag IC engine valve operating rocker lever
DE19838926A1 (en) * 1998-08-27 2000-03-02 Schaeffler Waelzlager Ohg Switchable valve train of an internal combustion engine
DE10164493A1 (en) * 2001-12-29 2003-07-10 Schoen Helmut Device for variable actuation of the charge exchange valves in reciprocating engines
WO2005075797A1 (en) * 2004-02-04 2005-08-18 Fev Motorentechnik Gmbh Drag lever for deviation switching
DE102004049836A1 (en) * 2004-10-13 2006-05-04 Daimlerchrysler Ag Internal combustion engine has valve control unit that has cam lever with contact area arranged over valve shaft end area of gas shutter valve, in which contact area of cam lever is formed with different radii points

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502426A (en) * 1982-05-17 1985-03-05 Skelley James H Variable valve lift and timing mechanism
JPS6116202A (en) * 1984-07-03 1986-01-24 Honda Motor Co Ltd Valve rocker arm device of internal-combustion engine
FR2643676A1 (en) * 1989-02-28 1990-08-31 Peugeot Rocker for actuating a poppet valve of an internal combustion engine
DE4244326A1 (en) * 1992-12-28 1994-06-30 Kloeckner Humboldt Deutz Ag IC engine valve operating rocker lever
DE19838926A1 (en) * 1998-08-27 2000-03-02 Schaeffler Waelzlager Ohg Switchable valve train of an internal combustion engine
DE10164493A1 (en) * 2001-12-29 2003-07-10 Schoen Helmut Device for variable actuation of the charge exchange valves in reciprocating engines
WO2005075797A1 (en) * 2004-02-04 2005-08-18 Fev Motorentechnik Gmbh Drag lever for deviation switching
DE102004049836A1 (en) * 2004-10-13 2006-05-04 Daimlerchrysler Ag Internal combustion engine has valve control unit that has cam lever with contact area arranged over valve shaft end area of gas shutter valve, in which contact area of cam lever is formed with different radii points

Also Published As

Publication number Publication date
EP2171221A2 (en) 2010-04-07
EP2171221B1 (en) 2011-09-14
ATE524639T1 (en) 2011-09-15
WO2009003840A2 (en) 2009-01-08

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