GB2385888B - Improvements to latchable cam lobe systems for poppet valve motion control - Google Patents

Improvements to latchable cam lobe systems for poppet valve motion control

Info

Publication number
GB2385888B
GB2385888B GB0214361A GB0214361A GB2385888B GB 2385888 B GB2385888 B GB 2385888B GB 0214361 A GB0214361 A GB 0214361A GB 0214361 A GB0214361 A GB 0214361A GB 2385888 B GB2385888 B GB 2385888B
Authority
GB
United Kingdom
Prior art keywords
latchable
motion control
poppet valve
cam lobe
valve motion
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.)
Expired - Fee Related
Application number
GB0214361A
Other versions
GB2385888A (en
GB0214361D0 (en
Inventor
Jean-Pierre Pirault
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.)
Powertrain Technology Ltd
Original Assignee
Powertrain Technology 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 Powertrain Technology Ltd filed Critical Powertrain Technology Ltd
Priority to GB0214361A priority Critical patent/GB2385888B/en
Publication of GB0214361D0 publication Critical patent/GB0214361D0/en
Priority to AU2003277971A priority patent/AU2003277971A1/en
Priority to EP03740744A priority patent/EP1534938A2/en
Priority to PCT/GB2003/002594 priority patent/WO2004001199A2/en
Publication of GB2385888A publication Critical patent/GB2385888A/en
Application granted granted Critical
Publication of GB2385888B publication Critical patent/GB2385888B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • 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
    • 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
    • F01L13/0057—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 splittable or deformable cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
    • F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
    • F16H53/04—Adjustable cams
    • 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
    • F01L2301/00—Using particular materials
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
GB0214361A 2002-06-21 2002-06-21 Improvements to latchable cam lobe systems for poppet valve motion control Expired - Fee Related GB2385888B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB0214361A GB2385888B (en) 2002-06-21 2002-06-21 Improvements to latchable cam lobe systems for poppet valve motion control
AU2003277971A AU2003277971A1 (en) 2002-06-21 2003-06-17 Improvements to latchable cam-lobe systems for poppet valve motion control
EP03740744A EP1534938A2 (en) 2002-06-21 2003-06-17 Improvements to latchable cam-lobe systems for poppet valve motion control
PCT/GB2003/002594 WO2004001199A2 (en) 2002-06-21 2003-06-17 Improvements to latchable cam-lobe systems for poppet valve motion control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0214361A GB2385888B (en) 2002-06-21 2002-06-21 Improvements to latchable cam lobe systems for poppet valve motion control

Publications (3)

Publication Number Publication Date
GB0214361D0 GB0214361D0 (en) 2002-07-31
GB2385888A GB2385888A (en) 2003-09-03
GB2385888B true GB2385888B (en) 2004-05-05

Family

ID=9939054

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0214361A Expired - Fee Related GB2385888B (en) 2002-06-21 2002-06-21 Improvements to latchable cam lobe systems for poppet valve motion control

Country Status (4)

Country Link
EP (1) EP1534938A2 (en)
AU (1) AU2003277971A1 (en)
GB (1) GB2385888B (en)
WO (1) WO2004001199A2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7069889B2 (en) 2003-06-02 2006-07-04 Mahle Ventiltrieb Gmbh Camshaft, especially for an internal combustion engine of a motor vehicle, comprising shiftable cams
FR2891004B1 (en) * 2005-09-16 2011-03-25 Renault Sas DEVICE FOR ACTUATING A VALVE COMPRISING A DECENTRATED CAMBER SHAFT CARRYING A MOBILE CAM
GB2434404B (en) * 2006-01-18 2010-11-03 Powertrain Technology Ltd Improvements to variable valve actuation using slideable, latching cam lobes
GB0613727D0 (en) * 2006-07-11 2006-08-23 Powertrain Technology Ltd Improvements to 2-step variable timing mechanisms
EP2031194B1 (en) * 2007-08-28 2016-02-24 Perkins Engines Company Limited Assembled camshaft for exhaust gas recirculation system
DE102010012264B4 (en) 2010-03-22 2015-07-16 Assa Abloy Sicherheitstechnik Gmbh A door locking device
DE102012219453A1 (en) * 2012-10-24 2014-04-24 Mahle International Gmbh Multiple cam
JP5920177B2 (en) * 2012-11-14 2016-05-18 トヨタ自動車株式会社 Variable valve operating device for internal combustion engine
JP2014152694A (en) * 2013-02-07 2014-08-25 Toyota Motor Corp Variable valve gear for internal combustion engine
CN103967549A (en) * 2014-05-21 2014-08-06 中国第一汽车股份有限公司 One-cylinder multiple-cam combined type cam shaft
JP6070730B2 (en) 2015-01-15 2017-02-01 トヨタ自動車株式会社 Variable valve operating device for internal combustion engine
JP6252528B2 (en) 2015-03-19 2017-12-27 トヨタ自動車株式会社 Variable valve operating device for internal combustion engine
FR3117540B1 (en) * 2020-12-14 2022-12-16 Renault Camshaft of an internal combustion engine.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5404770A (en) * 1991-08-14 1995-04-11 Volkswagen Ag Variable cam arrangement for a lift valve

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01178710A (en) * 1988-01-06 1989-07-14 Mazda Motor Corp Valve driving device for engine
US5746166A (en) * 1993-12-17 1998-05-05 Valasopoulos; Christos CAM lobe with offset angular movement
AU6155494A (en) * 1994-03-03 1995-09-18 Christos Valasopoulos Variable action arrowhead shaped cam lobe system
US5855190A (en) * 1996-09-24 1999-01-05 Yamaha Hatsudoki Kabushiki Kaisha Valve-actuating variable cam for engine
DE19645112A1 (en) * 1996-11-01 1998-05-14 Roland Klaar Built camshaft
DE10030904A1 (en) * 2000-06-23 2002-01-31 Audi Ag Variable geometry camshaft for IC engine has radially adjustable cam segment to vary valve stroke
JP4248131B2 (en) * 2000-07-05 2009-04-02 ヤマハ発動機株式会社 Four-cycle engine valve gear

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5404770A (en) * 1991-08-14 1995-04-11 Volkswagen Ag Variable cam arrangement for a lift valve

Also Published As

Publication number Publication date
GB2385888A (en) 2003-09-03
AU2003277971A1 (en) 2004-01-06
WO2004001199A3 (en) 2004-03-04
GB0214361D0 (en) 2002-07-31
WO2004001199A2 (en) 2003-12-31
EP1534938A2 (en) 2005-06-01

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20200621