EP1785597A1 - Nockenwellenverstellanordnung - Google Patents

Nockenwellenverstellanordnung Download PDF

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Publication number
EP1785597A1
EP1785597A1 EP05256995A EP05256995A EP1785597A1 EP 1785597 A1 EP1785597 A1 EP 1785597A1 EP 05256995 A EP05256995 A EP 05256995A EP 05256995 A EP05256995 A EP 05256995A EP 1785597 A1 EP1785597 A1 EP 1785597A1
Authority
EP
European Patent Office
Prior art keywords
drive
slide member
cam phaser
driven
driven members
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.)
Withdrawn
Application number
EP05256995A
Other languages
English (en)
French (fr)
Inventor
Peter Baur
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP05256995A priority Critical patent/EP1785597A1/de
Publication of EP1785597A1 publication Critical patent/EP1785597A1/de
Withdrawn legal-status Critical Current

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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
    • 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
    • F01L1/34403—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 helically teethed sleeve or gear moving axially between crankshaft and camshaft
    • 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

Definitions

  • the present invention relates to cam phaser apparatus, particularly, but not exclusively cam phaser apparatus used in valve trains of automobile engines.
  • cam phaser capable of achieving this exist.
  • Such system are required to efficiently convert rotational movement from the drive shaft into rotational movement of the cam shaft whilst allowing dislocation between these rotational movements in order to allow variation of the cam phase.
  • Current systems typically require a complex arrangement of planetary gears which have the disadvantage of producing large frictional losses in the conversion process. The complex arrangement of such systems can also introduce controllability and reliability problems.
  • cam phaser 10 is typically mounted on a driven member such as a cam shaft 12 which is connected to a sprocket 14 via a drive member such as a sprocket shaft 16.
  • Coupling means provides a connection between the cam shaft 12 and sprocket shaft 16 and comprises a helical spline member 18 (shown in more detail in Fig. 1B) housed within a lead screw (or slide member) 22, a bearing 20 provided between the helical spline member 18 and the sprocket shaft 16, and actuating means comprising adjusting means in the form of a combined nut and rotor 24 positioned within a stator 26.
  • the helical spline member 18 is a cylindrical member fixed to the cam shaft 12 and has helical protrusions 28 around its outer surface.
  • the lead screw 22 has outer walls 22A provided with thread teeth 23, base portion 22B and inner walls 22C.
  • the inner walls 22C project through the screw 22 such that a bore is provided there through.
  • the inner walls 22C are also provided with protruding guide tongues 32 on their inner diameter; these engage with longitudinal grooves 34 provided along sprocket shaft 16.
  • the lead screw 22 is engaged with the helical spline member 18 such that engagement members 30 on the internal diameter of walls 22A mate with the helical formations 28 on the outer diameter of helical spline member 18.
  • the helical spline member 18 is free to rotate with respect to the sprocket shaft 16 by way of bearing 20; however, lead screw 22 is rotationally fixed relative to the sprocket shaft 16.
  • Combined nut and rotor 24 is able to move longitudinally along shaft 16 by way of the guide tongues 32 and grooves 34 or alternatively by way of a straight spline system which would allow a higher torque to be transmitted.
  • the combined rotor and nut 24 has a head 36 provided with teeth 38 which engage with teeth 23 on the lead screw 22.
  • the teeth 23, 38 can be regarded as screw threads.
  • the remaining portion of the combined nut and rotor 24 comprises a rotor drum 40 which rotatably mounts the rotor on the sprocket shaft 16 by way of a bearing 42.
  • Stator 26 is provided around the combined nut and rotor 24 and its operation will be described subsequently.
  • stator 26 When no current is supplied to the stator 26, the lead screw 22 will remain in its longitudinal position with reference to longitudinal axis L and rotate at the same speed as the sprocket shaft 16.
  • stator 26 and combined nut and rotor 24 are actuated as an electric motor. In order to do this a suitable current is supplied to the stator 26 such that an electromagnetic torque is provided on the combined nut and rotor 24. This torque causes the combined nut and rotor 24 speed to increase (or decrease) relative to the rotating cam shaft 16 and hence the lead screw 22.
  • This relative movement of the combined nut and rotor 24 causes the screw head 36 to move the lead screw 22 longitudinally along the shaft 16 due to the interaction between teeth 23 of the lead screw 22 and teeth 38 of the combined nut and rotor 24.
  • This longitudinal movement of the lead screw 22 is assisted by guide tongues 32 which slide along the longitudinal grooves 34 of the shaft 16.
  • the guide tongues 32 and grooves 34 also allow rotational force from the sprocket shaft 16 to be transmitted through the lead screw 22 to the helical spline 18.
  • Suitable components may be selected during manufacture to allow a sufficient torque to be supplied by the stator 26 and rotor 24.
  • the torque force provided is converted into linear movement by the lead screw 22 and then back to a torque force by the helical spline member 18 on the cam side of the phaser 10.
  • a portion of the torque force is used to overcome the cam friction and required valve actuation force of the engine to which it is connected.
  • the system described allows the phase of the cam shaft to be reliably altered whilst the engine is running.
  • the cam phase may be advanced or retarded depending upon the direction in which the rotor 24 is urged by the stator 26.
  • Such adjustment may be controlled by the engine management system of typical automobiles.
  • the system therefore effectively allows the rotational position of the cam shaft 12 to be varied relative to the rotational position of the sprocket shaft 16.
  • the cam phase has been adjusted into the advanced / retarded position it will remain in that position (without any external forces from e.g. the rotor/stator being required) until it is positively re-adjusted by the engine management system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
EP05256995A 2005-11-12 2005-11-12 Nockenwellenverstellanordnung Withdrawn EP1785597A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05256995A EP1785597A1 (de) 2005-11-12 2005-11-12 Nockenwellenverstellanordnung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05256995A EP1785597A1 (de) 2005-11-12 2005-11-12 Nockenwellenverstellanordnung

Publications (1)

Publication Number Publication Date
EP1785597A1 true EP1785597A1 (de) 2007-05-16

Family

ID=36283844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05256995A Withdrawn EP1785597A1 (de) 2005-11-12 2005-11-12 Nockenwellenverstellanordnung

Country Status (1)

Country Link
EP (1) EP1785597A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2261469A1 (de) * 2008-02-27 2010-12-15 Nittan Valve Co., Ltd. Motorventilsteuerung
CN106625016A (zh) * 2016-10-20 2017-05-10 重庆跃进机械厂有限公司 细长凸轮轴插内花键定位找正方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4976229A (en) * 1990-02-12 1990-12-11 Siemens Automotive L.P. Engine camshaft phasing
US5785018A (en) * 1995-11-09 1998-07-28 Fev Motorentechnik Gmbh & Co Kg Adjustable device for cam-controlled valve operation of a piston-type internal combustion engine
US6196927B1 (en) * 1994-03-03 2001-03-06 Bayerische Motoren Werke Aktiengesellschaft Arrangement for relative adjustment of rotation angle of a control shaft of an internal combustion engine
US6199522B1 (en) * 1999-08-27 2001-03-13 Daimlerchrysler Corporation Camshaft phase controlling device
US6216654B1 (en) * 1999-08-27 2001-04-17 Daimlerchrysler Corporation Phase changing device
DE19951392A1 (de) * 1999-10-26 2001-05-03 Schaeffler Waelzlager Ohg Vorrichtung zur drehfesten Kopplung und zur Veränderung der relativen Drehlage zweier koaxial um eine Drehachse drehbarer Gehäuse
EP1201886A1 (de) * 2000-10-23 2002-05-02 Nissan Motor Co., Ltd. Bezugsgrössenlernvorrichtung und Methode einer variablen Ventilzeitensteuerung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4976229A (en) * 1990-02-12 1990-12-11 Siemens Automotive L.P. Engine camshaft phasing
US6196927B1 (en) * 1994-03-03 2001-03-06 Bayerische Motoren Werke Aktiengesellschaft Arrangement for relative adjustment of rotation angle of a control shaft of an internal combustion engine
US5785018A (en) * 1995-11-09 1998-07-28 Fev Motorentechnik Gmbh & Co Kg Adjustable device for cam-controlled valve operation of a piston-type internal combustion engine
US6199522B1 (en) * 1999-08-27 2001-03-13 Daimlerchrysler Corporation Camshaft phase controlling device
US6216654B1 (en) * 1999-08-27 2001-04-17 Daimlerchrysler Corporation Phase changing device
DE19951392A1 (de) * 1999-10-26 2001-05-03 Schaeffler Waelzlager Ohg Vorrichtung zur drehfesten Kopplung und zur Veränderung der relativen Drehlage zweier koaxial um eine Drehachse drehbarer Gehäuse
EP1201886A1 (de) * 2000-10-23 2002-05-02 Nissan Motor Co., Ltd. Bezugsgrössenlernvorrichtung und Methode einer variablen Ventilzeitensteuerung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2261469A1 (de) * 2008-02-27 2010-12-15 Nittan Valve Co., Ltd. Motorventilsteuerung
EP2261469A4 (de) * 2008-02-27 2011-10-12 Nittan Valva Motorventilsteuerung
US8381694B2 (en) 2008-02-27 2013-02-26 Nittan Valve Co., Ltd. Engine valve controller
CN106625016A (zh) * 2016-10-20 2017-05-10 重庆跃进机械厂有限公司 细长凸轮轴插内花键定位找正方法
CN106625016B (zh) * 2016-10-20 2018-11-13 重庆跃进机械厂有限公司 细长凸轮轴插内花键定位找正方法

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