EP1197641A3 - Starting position locking device for camshaft - Google Patents

Starting position locking device for camshaft Download PDF

Info

Publication number
EP1197641A3
EP1197641A3 EP01123536A EP01123536A EP1197641A3 EP 1197641 A3 EP1197641 A3 EP 1197641A3 EP 01123536 A EP01123536 A EP 01123536A EP 01123536 A EP01123536 A EP 01123536A EP 1197641 A3 EP1197641 A3 EP 1197641A3
Authority
EP
European Patent Office
Prior art keywords
camshaft
locking device
starting position
position locking
starting
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
EP01123536A
Other languages
German (de)
French (fr)
Other versions
EP1197641A2 (en
EP1197641B1 (en
Inventor
Edwin Palesch
Alfred Trzmiel
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.)
Hilite Germany GmbH
Original Assignee
Hydraulik Ring GmbH
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 Hydraulik Ring GmbH filed Critical Hydraulik Ring GmbH
Publication of EP1197641A2 publication Critical patent/EP1197641A2/en
Publication of EP1197641A3 publication Critical patent/EP1197641A3/en
Application granted granted Critical
Publication of EP1197641B1 publication Critical patent/EP1197641B1/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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • F01L2001/3443—Solenoid driven oil control 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34446—Fluid accumulators for the feeding circuit
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/01—Starting

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
EP01123536A 2000-10-11 2001-09-29 Starting position locking device for camshaft Expired - Lifetime EP1197641B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10050225A DE10050225A1 (en) 2000-10-11 2000-10-11 Actuating device for fixing a camshaft of a drive engine of a vehicle, preferably a motor vehicle, in a starting position
DE10050225 2000-10-11

Publications (3)

Publication Number Publication Date
EP1197641A2 EP1197641A2 (en) 2002-04-17
EP1197641A3 true EP1197641A3 (en) 2003-01-29
EP1197641B1 EP1197641B1 (en) 2005-02-09

Family

ID=7659325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01123536A Expired - Lifetime EP1197641B1 (en) 2000-10-11 2001-09-29 Starting position locking device for camshaft

Country Status (4)

Country Link
US (3) US6739297B2 (en)
EP (1) EP1197641B1 (en)
DE (2) DE10050225A1 (en)
ES (1) ES2233543T3 (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004035035B4 (en) * 2003-07-24 2022-04-14 Daimler Ag Camshaft adjusters for internal combustion engines
US20050056249A1 (en) * 2003-07-24 2005-03-17 Matthias Heinze Camshaft adjustment control device
DE102004024132A1 (en) * 2004-05-14 2005-12-08 Hofer Mechatronik Gmbh Valve, in particular for controlling a camshaft adjusting device for motor vehicles
DE102005060111A1 (en) 2005-12-16 2007-07-05 Schaeffler Kg Camshaft adjuster feed line
US20070221149A1 (en) * 2006-03-22 2007-09-27 Victoriano Ruiz Auxiliary cam phaser hydraulic circuit and method of operation
JP4640616B2 (en) * 2006-08-23 2011-03-02 アイシン精機株式会社 Valve timing control device
US20090272366A1 (en) * 2008-04-30 2009-11-05 Caterpillar Inc. Internal combustion engine set up method and fuel pump having installation assist mechanism
US9022067B2 (en) * 2008-10-09 2015-05-05 Eaton Corporation Dual variable valve solenoid module
DE102009022869A1 (en) * 2009-05-27 2010-12-09 Hydraulik-Ring Gmbh Vane phaser system
DE102009034512A1 (en) * 2009-07-25 2011-01-27 Schaeffler Technologies Gmbh & Co. Kg Device for the variable adjustment of the timing of gas exchange valves of an internal combustion engine
DE102009050779B4 (en) 2009-10-27 2016-05-04 Hilite Germany Gmbh Schwenkmotornockenwellenversteller with a friction disc and mounting method
DE102009052841A1 (en) * 2009-11-13 2011-05-19 Hydraulik-Ring Gmbh camshafts use
DE102009054053A1 (en) 2009-11-20 2011-05-26 Schaeffler Technologies Gmbh & Co. Kg Pressure reservoir for hydraulic system, has housing, movable element and energy storage, where movable element is arranged within housing
DE102009054052B4 (en) 2009-11-20 2018-08-23 Schaeffler Technologies AG & Co. KG Switchable device for pressure supply
DE102009054050A1 (en) 2009-11-20 2011-05-26 Schaeffler Technologies Gmbh & Co. Kg Switchable device for supplying pressure to lubricating oil system of internal-combustion engine, has braking device switched into switched-off condition, in which rotating motion of screw pillar is not prevented
DE102009054055A1 (en) 2009-11-20 2011-05-26 Schaeffler Technologies Gmbh & Co. Kg Switchable device for pressure supply
DE102009054054A1 (en) 2009-11-20 2011-05-26 Schaeffler Technologies Gmbh & Co. Kg Mounting arrangement and method for mounting a pressure accumulator for internal combustion engines
DE102009054051A1 (en) 2009-11-20 2011-05-26 Schaeffler Technologies Gmbh & Co. Kg Switchable device for pressure supply with passive additional pressure accumulator
DE102010045358A1 (en) 2010-04-10 2011-10-13 Hydraulik-Ring Gmbh Schwenkmotornockenwellenversteller with a hydraulic valve
DE102010019005B4 (en) 2010-05-03 2017-03-23 Hilite Germany Gmbh Schwenkmotorversteller
DE102010023863A1 (en) 2010-06-15 2011-12-15 Hydraulik-Ring Gmbh Assembled camshaft for camshaft drive system for actuating charge-cycle valve of internal combustion engine, has piston supported opposite to camshaft insert and directly mounted within pipe for pivoting rotor against stator
KR101235056B1 (en) * 2010-12-06 2013-02-19 현대자동차주식회사 Improving method of starting ability for gdi engine using by electric cvvt control
DE102010061337B4 (en) 2010-12-20 2015-07-09 Hilite Germany Gmbh Hydraulic valve for a Schwenkmotorversteller
DE102012201551B4 (en) 2012-02-02 2022-05-12 Schaeffler Technologies AG & Co. KG Camshaft adjuster and method for filling a volume accumulator in a camshaft adjuster
DE102016210177B4 (en) 2015-07-08 2022-03-31 Ford Global Technologies, Llc Variable camshaft timing device

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0799977A1 (en) * 1996-04-04 1997-10-08 Toyota Jidosha Kabushiki Kaisha Variable valve timing mechanism for internal combustion engine
EP0799976A1 (en) * 1996-04-03 1997-10-08 Toyota Jidosha Kabushiki Kaisha Variable valve timing mechanism for internal combustion engine
EP0821138A1 (en) * 1996-07-23 1998-01-28 Aisin Seiki Kabushiki Kaisha Valve timing control devices
EP0859130A1 (en) * 1997-02-14 1998-08-19 Toyota Jidosha Kabushiki Kaisha System for regulating valve timing of internal combustion engine
EP0896129A1 (en) * 1997-08-05 1999-02-10 Toyota Jidosha Kabushiki Kaisha Valve timing controlling apparatus for internal combustion engine
US6024061A (en) * 1997-01-31 2000-02-15 Denso Corporation Valve timing adjusting apparatus for internal combustion engines
US6035819A (en) * 1998-01-30 2000-03-14 Aisin Seiki Kabushiki Kaisha Variable valve timing controller
US6053139A (en) * 1998-04-27 2000-04-25 Aisin Seiki Kabushiki Kaisha Valve timing control device
US6058897A (en) * 1998-03-31 2000-05-09 Aisin Seiki Kabushiki Kaisha Valve timing device
EP1008729A2 (en) * 1998-12-07 2000-06-14 Mitsubishi Denki Kabushiki Kaisha A vane type hydraulic actuator

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779669A (en) * 1972-05-22 1973-12-18 Wooster Brush Co Pump spray unit
JPS5578150A (en) * 1978-12-06 1980-06-12 Nissan Motor Co Ltd Exhaust gas return control device for internal conbustion engine
US4854649A (en) * 1987-01-14 1989-08-08 Nippon A B S, Ltd. Anti-skid control apparatus for a vehicle braking system
DE4023853A1 (en) * 1990-07-27 1992-01-30 Audi Ag VALVE CONTROLLED INTERNAL COMBUSTION ENGINE
JP2516837B2 (en) * 1990-09-25 1996-07-24 日信工業株式会社 Brake fluid pressure controller for rear brake
US5271360A (en) * 1990-11-08 1993-12-21 Aisin Seiki Kabushiki Kaisha Valve opening and closing timing control apparatus
US5509383A (en) * 1991-02-20 1996-04-23 Itt Automotive Europe Gmbh Hydraulic unit
US5355849A (en) * 1992-07-20 1994-10-18 Miljenko Schiattino Automatic variator valve overlap or timing and valve section
US5291860A (en) * 1993-03-04 1994-03-08 Borg-Warner Automotive, Inc. VCT system with control valve bias at low pressures and unbiased control at normal operating pressures
US5367992A (en) * 1993-07-26 1994-11-29 Borg-Warner Automotive, Inc. Variable camshaft timing system for improved operation during low hydraulic fluid pressure
JP3733600B2 (en) * 1994-08-31 2006-01-11 株式会社デンソー Engine valve operation timing adjustment device
JP3039331B2 (en) * 1995-03-27 2000-05-08 トヨタ自動車株式会社 Valve timing control device for internal combustion engine
GB2302391B (en) * 1995-06-14 1999-08-18 Nippon Denso Co Control apparatus for varying the rotational or angular phase between two rotational shafts
US5799694A (en) * 1996-10-10 1998-09-01 Eaton Corporation Steering control unit
DE19723945A1 (en) * 1997-06-06 1998-12-10 Schaeffler Waelzlager Ohg Gas exchange valve timing gear for IC engine
CA2217623C (en) 1997-10-02 2001-08-07 Robert Siy Cold dense slurrying process for extracting bitumen from oil sand
JP3536692B2 (en) * 1998-12-07 2004-06-14 トヨタ自動車株式会社 Valve timing control device for internal combustion engine
GB2350660A (en) * 1999-06-01 2000-12-06 Mechadyne Internat Plc Phase change coupling
US6322439B1 (en) * 2000-09-14 2001-11-27 Robert C. David Multi-directional vent hatch

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0799976A1 (en) * 1996-04-03 1997-10-08 Toyota Jidosha Kabushiki Kaisha Variable valve timing mechanism for internal combustion engine
EP0799977A1 (en) * 1996-04-04 1997-10-08 Toyota Jidosha Kabushiki Kaisha Variable valve timing mechanism for internal combustion engine
EP0821138A1 (en) * 1996-07-23 1998-01-28 Aisin Seiki Kabushiki Kaisha Valve timing control devices
US6024061A (en) * 1997-01-31 2000-02-15 Denso Corporation Valve timing adjusting apparatus for internal combustion engines
EP0859130A1 (en) * 1997-02-14 1998-08-19 Toyota Jidosha Kabushiki Kaisha System for regulating valve timing of internal combustion engine
EP0896129A1 (en) * 1997-08-05 1999-02-10 Toyota Jidosha Kabushiki Kaisha Valve timing controlling apparatus for internal combustion engine
US6035819A (en) * 1998-01-30 2000-03-14 Aisin Seiki Kabushiki Kaisha Variable valve timing controller
US6058897A (en) * 1998-03-31 2000-05-09 Aisin Seiki Kabushiki Kaisha Valve timing device
US6053139A (en) * 1998-04-27 2000-04-25 Aisin Seiki Kabushiki Kaisha Valve timing control device
EP1008729A2 (en) * 1998-12-07 2000-06-14 Mitsubishi Denki Kabushiki Kaisha A vane type hydraulic actuator

Also Published As

Publication number Publication date
US7107952B2 (en) 2006-09-19
US6968815B2 (en) 2005-11-29
US20040187817A1 (en) 2004-09-30
EP1197641A2 (en) 2002-04-17
US6739297B2 (en) 2004-05-25
US20040187816A1 (en) 2004-09-30
US20020088417A1 (en) 2002-07-11
DE50105289D1 (en) 2005-03-17
ES2233543T3 (en) 2005-06-16
DE10050225A1 (en) 2002-04-25
EP1197641B1 (en) 2005-02-09

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