WO2007104287A3 - Variable valve drive for an internal combustion engine - Google Patents

Variable valve drive for an internal combustion engine Download PDF

Info

Publication number
WO2007104287A3
WO2007104287A3 PCT/DE2007/000437 DE2007000437W WO2007104287A3 WO 2007104287 A3 WO2007104287 A3 WO 2007104287A3 DE 2007000437 W DE2007000437 W DE 2007000437W WO 2007104287 A3 WO2007104287 A3 WO 2007104287A3
Authority
WO
WIPO (PCT)
Prior art keywords
cam
camshaft
profile height
valve
gas exchange
Prior art date
Application number
PCT/DE2007/000437
Other languages
German (de)
French (fr)
Other versions
WO2007104287A2 (en
Inventor
Joerg Wutzler
Original Assignee
Iav Gmbh
Joerg Wutzler
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 Iav Gmbh, Joerg Wutzler filed Critical Iav Gmbh
Priority to EP07722012A priority Critical patent/EP2181250A2/en
Priority to US11/919,951 priority patent/US20090064952A1/en
Publication of WO2007104287A2 publication Critical patent/WO2007104287A2/en
Publication of WO2007104287A3 publication Critical patent/WO2007104287A3/en

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
    • 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
    • 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
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • 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
    • 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
    • F01L13/0036—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
    • F01L2013/0052—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 with cams provided on an axially slidable sleeve

Abstract

The invention relates to a valve drive for internal combustion engines, comprising at least one cam assembly which can be axially displaced on a camshaft. Said assembly consists of at least two cams (2, 3) having different profiles and actuating optionally at least one gas exchange valve for adjusting different valve lifts and/or valve timings. For this purpose, one cam is connected to the camshaft so as to rotate with the camshaft and the other cam is mounted so as to be rotated on the camshaft. The cam that is rotationally mounted on the camshaft can be positively connected to and released from the cam that is connected so as to rotate with the camshaft via a controlled pilot and main locking plunger (6). The rotationally fixed cam has a larger profile height than the rotationally mounted cam. The larger profile height is designed for a relatively large lift of the gas exchange valve, while the lower cam profile height is designed for smaller lift heights. By displacing the cam assembly when the cams are coupled, the cam with the larger or the smaller profile height can be engaged with the gas exchange valve. A zero lift of the gas exchange valve can be adjusted, when the cam with the smaller profile height engages, by decoupling the rotational cam from the cam that is arranged on the camshaft so as to rotate therewith.
PCT/DE2007/000437 2006-03-15 2007-03-09 Variable valve drive for an internal combustion engine WO2007104287A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07722012A EP2181250A2 (en) 2006-03-15 2007-03-09 Valve drive for an internal combustion engine
US11/919,951 US20090064952A1 (en) 2006-03-15 2007-03-09 Valve drive for an internal combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006012386A DE102006012386B3 (en) 2006-03-15 2006-03-15 Valve gear for internal combustion engine, has cam connected with cam shaft in torque-proof manner, and another cam supported on cam shaft, where latter cam is connectable and separable with former cam by controllable main locking piston
DE102006012386.7 2006-03-15

Publications (2)

Publication Number Publication Date
WO2007104287A2 WO2007104287A2 (en) 2007-09-20
WO2007104287A3 true WO2007104287A3 (en) 2007-11-01

Family

ID=38320118

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2007/000437 WO2007104287A2 (en) 2006-03-15 2007-03-09 Variable valve drive for an internal combustion engine

Country Status (5)

Country Link
US (1) US20090064952A1 (en)
EP (1) EP2181250A2 (en)
KR (1) KR20080104227A (en)
DE (1) DE102006012386B3 (en)
WO (1) WO2007104287A2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008005639B4 (en) * 2008-01-23 2021-10-21 Daimler Ag Valvetrain device
DE102008028513A1 (en) * 2008-06-16 2009-12-24 Audi Ag Valve operation for gas exchange valves of an internal combustion engine with double-supported cam carriers
DE102011109256B4 (en) * 2011-08-02 2015-11-19 Audi Ag Valve gear of an internal combustion engine and internal combustion engine
DE102011117244B4 (en) * 2011-10-27 2023-08-10 Mercedes-Benz Group AG Valve train for an internal combustion engine
JP2013234601A (en) * 2012-05-08 2013-11-21 Toyota Motor Corp Variable valve apparatus
JP6102338B2 (en) * 2013-02-26 2017-03-29 マツダ株式会社 Engine valve gear
DE102015204550A1 (en) * 2015-03-13 2016-09-15 Bayerische Motoren Werke Aktiengesellschaft Camshaft with a decompression device
DE102015117920B4 (en) * 2015-10-21 2023-01-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Camshaft arrangement in an internal combustion engine
JP6360513B2 (en) * 2016-03-31 2018-07-18 本田技研工業株式会社 Lubrication structure of variable valve gear
DE102016217146A1 (en) 2016-09-08 2018-03-08 Volkswagen Aktiengesellschaft Variable camshaft control
DE102017203869A1 (en) * 2017-03-09 2018-09-13 Thyssenkrupp Ag Camshaft with lubricated sliding piece
DE102020208231A1 (en) 2020-07-01 2022-01-05 Volkswagen Aktiengesellschaft Plain bearings with a lubricant channel and at least three axial slide positions
KR102395512B1 (en) 2020-07-16 2022-05-09 제이엔티(주) Self Safe braking motor-driven elderly walking assist device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4886022A (en) * 1988-01-06 1989-12-12 Mazda Motor Corporation Engine valve driving apparatus
US5253622A (en) * 1993-02-17 1993-10-19 Bornstein Motor Company, Inc. Cam phase change mechanism
US5664463A (en) * 1993-03-03 1997-09-09 Amborn; Peter Camshaft assembly with shaft elements positioned one inside the other and method of producing same
US5862783A (en) * 1998-03-12 1999-01-26 Lewis; Henry E. Variable angle camshaft
DE10148179A1 (en) * 2001-09-28 2003-04-17 Ina Schaeffler Kg Valve drive with valve stroke reversal for gas exchange valves of 4-stroke IC engines has toothed shaft in center between gas exchange valves, and single undivided cam part
US20050034694A1 (en) * 2000-10-23 2005-02-17 Transtar Pacific Limited Variable duration valve timing camshaft
DE102004022832A1 (en) * 2004-05-08 2005-12-01 Dr.Ing.H.C. F. Porsche Ag Valve operating mechanism for internal combustion engine of motor vehicle, has cam tracks actuating valves via sliding unit which includes sliding pivot and operating units, where tracks have with different cam profiles and lifting curves
DE102004021376A1 (en) * 2004-04-30 2005-12-08 Audi Ag Valve train for internal combustion engine, has sliding surface forming radial bearing and formed in bearing block, and radially rotating nut connected with lubricant e.g. oil, supply of internal combustion engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4228796A1 (en) * 1992-08-29 1994-03-03 Porsche Ag Valve drive arrangement for an internal combustion engine
DE10054623A1 (en) * 2000-11-03 2002-05-08 Audi Ag Device for changeover of cam pack on camshaft to operate gas exchange valves has actuating element in form of pin movable radially outwards and in extended state interacting with slide tracks in guide section

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4886022A (en) * 1988-01-06 1989-12-12 Mazda Motor Corporation Engine valve driving apparatus
US5253622A (en) * 1993-02-17 1993-10-19 Bornstein Motor Company, Inc. Cam phase change mechanism
US5664463A (en) * 1993-03-03 1997-09-09 Amborn; Peter Camshaft assembly with shaft elements positioned one inside the other and method of producing same
US5862783A (en) * 1998-03-12 1999-01-26 Lewis; Henry E. Variable angle camshaft
US20050034694A1 (en) * 2000-10-23 2005-02-17 Transtar Pacific Limited Variable duration valve timing camshaft
DE10148179A1 (en) * 2001-09-28 2003-04-17 Ina Schaeffler Kg Valve drive with valve stroke reversal for gas exchange valves of 4-stroke IC engines has toothed shaft in center between gas exchange valves, and single undivided cam part
DE102004021376A1 (en) * 2004-04-30 2005-12-08 Audi Ag Valve train for internal combustion engine, has sliding surface forming radial bearing and formed in bearing block, and radially rotating nut connected with lubricant e.g. oil, supply of internal combustion engine
DE102004022832A1 (en) * 2004-05-08 2005-12-01 Dr.Ing.H.C. F. Porsche Ag Valve operating mechanism for internal combustion engine of motor vehicle, has cam tracks actuating valves via sliding unit which includes sliding pivot and operating units, where tracks have with different cam profiles and lifting curves

Also Published As

Publication number Publication date
EP2181250A2 (en) 2010-05-05
WO2007104287A2 (en) 2007-09-20
DE102006012386B3 (en) 2007-08-30
US20090064952A1 (en) 2009-03-12
KR20080104227A (en) 2008-12-02

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