EP2006499A2 - Verriegelungsmechanismus für einen Nockenwellenversteller - Google Patents

Verriegelungsmechanismus für einen Nockenwellenversteller Download PDF

Info

Publication number
EP2006499A2
EP2006499A2 EP07252293A EP07252293A EP2006499A2 EP 2006499 A2 EP2006499 A2 EP 2006499A2 EP 07252293 A EP07252293 A EP 07252293A EP 07252293 A EP07252293 A EP 07252293A EP 2006499 A2 EP2006499 A2 EP 2006499A2
Authority
EP
European Patent Office
Prior art keywords
drive
valve
chamber
driven members
fluid
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Withdrawn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
EP07252293A
Other languages
English (en)
French (fr)
Other versions
EP2006499A3 (de
Inventor
Axel H Berndorfer
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 EP07252293A priority Critical patent/EP2006499A3/de
Publication of EP2006499A2 publication Critical patent/EP2006499A2/de
Publication of EP2006499A3 publication Critical patent/EP2006499A3/de
Withdrawn legal-status Critical Current

Links

Images

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
    • F01L1/3442—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

Definitions

  • the present invention relates to a locking mechanism for a cam phaser and in particular to a locking mechanism for selectively locking drive and driven members of a cam phaser apparatus of an internal combustion engine to selectively maintain the relative angular orientation between said drive and driven members.
  • Cam phasers for internal combustion engines are well known.
  • the engine's crankshaft is normally drivingly connected to the camshaft via a chain or belt running on sprockets or pulleys.
  • a cam phaser is disposed between the camshaft drive sprocket (drive member) and the camshaft (driven member) to permit adjustment of angular orientation of the camshaft with respect to the crankshaft.
  • pressurized oil from an oil gallery in the engine block is selectively distributed to timing advance and retard chambers within the phaser by means of suitable valve means to controllably vary the phase relationship between the engine's crankshaft and camshaft.
  • the chambers are formed between inwardly-extending lobes of a generally cylindrical stator and outwardly-extending vanes of a rotor concentrically disposed within the stator.
  • prior art cam phaser assemblies have included a locking pin arranged to lock the drive and driven members of the cam phaser assembly at an end position of the cam phaser range of angular adjustment, either fully retarded or fully advanced.
  • the mechanism typically includes a bore disposed in one of the drive or driven members and a spring-biased locking pin disposed therein.
  • the locking pin is spring biased to lock into a corresponding receiving aperture in the other of the drive or driven member whenever the pin and receiving aperture are rotationally aligned at either the fully retarded or fully advanced positions of the cam phaser.
  • An oil well is located on one side of the pin and communicates with a passageway supplied with oil from the oil pump to force the pin from the receiving aperture to enable the cam phaser to operate while the engine is operating and to enable the locking pin to be automatically urged into the receiving aperture to lock the drive and driven members together when the oil pressure falls below that required to overcome the biasing force of the spring bias as the engine is switched off.
  • a locking means for a variable cam phaser including coaxial drive and driven members drivingly connected by phase control means for selectively varying the relative angular orientation of said drive and driven members, said locking means comprising a locking pin provided on one of said drive and driven members for movement between an unlocked position, to allow angular adjustment of said drive and driven members by the phase control means, and a locked position, wherein the locking pin engages a receiving means provided on the other of the drive and driven members to maintain said relative angular orientation between said drive and driven members; biasing means being provided for biasing said locking pin to its locked position; a portion of the locking pin being exposed to a chamber, said chamber being selectively communicable with a source of pressurised fluid whereby pressurisation of said chamber with high pressure fluid urges the locking pin to its unlocked position; actuating means being provided for selectively placing said chamber in fluid communication with said source of pressurised fluid.
  • the actuating means comprises a valve provided in a fluid passageway between said chamber and said source of pressurised fluid, said valve having a valve member moveable between a first position, wherein said valve member prevents fluid communication between said source of pressurised fluid and said chamber, and a second position wherein said valve member allows fluid communication between said source of pressurised fluid and said chamber.
  • said valve comprises a check valve, said valve member being spring biased towards its first position, said valve member being moved towards its second position when the pressure of fluid in said source of pressurised fluid exceeds a predetermined value.
  • Said valve may further include means for venting said chamber to a drain when said valve member moves to its first position.
  • Said venting means may comprise a vent port communicating with a drain or low pressure region.
  • Said valve may include means for closing said vent port when said valve member reaches its first position.
  • said valve includes a valve member engageable with a first valve seat when in its first position to close fluid communication between said source of pressurised fluid and said chamber when said valve member engages said first port and engageable with a second valve seat when in its second position to close fluid communication between said chamber and said vent port.
  • said valve member is biased towards the first valve seat by means of a spring or other resilient biasing means, said valve member being urged towards said second valve seat when the fluid pressure from said source of pressurised fluid exceeds a predetermined level.
  • said valve comprises a solenoid actuated valve.
  • variable cam phaser including coaxial drive and driven members drivingly connected by phase control means for selectively varying the relative angular orientation of said drive and driven members and a locking means in accordance with the abovementioned first aspect of the invention.
  • an internal combustion engine having a variable cam phaser including coaxial drive and driven members drivingly connected by phase control means for selectively varying the relative angular orientation of said drive and driven members and a locking means in accordance with the abovementioned first aspect of the invention.
  • said fluid comprises lubricating oil for lubricating the moving parts of the engine.
  • Said source of pressurised fluid preferably comprises an oil pump for supplying said lubricating oil to the moving parts of the engine.
  • a cam phaser 1 according to an embodiment of the present invention is illustrated in Figure 1 .
  • the cam phaser 1 is disposed between the camshaft drive sprocket 2 (drive member) and the camshaft 3 (driven member) to permit adjustment of angular orientation of the camshaft 3 with respect to the crankshaft.
  • Pressurized oil from an oil gallery in the engine block supplied with oil from the oil pump is selectively distributed to timing advance and retard chambers (not shown) within the phaser by means of suitable valve means to controllably vary the phase relationship between the engine's crankshaft and camshaft.
  • the chambers are formed between inwardly-extending lobes of a generally cylindrical stator and outwardly-extending vanes of a rotor concentrically disposed within the stator.
  • a locking pin 10 is mounted within the cam phaser and arranged to lock the drive and driven members of the cam phaser assembly together at a predetermined position.
  • the locking pin 10 is slidably mounted within a bore 12 disposed in one half of the cam phaser.
  • the locking pin 10 is biased by means of a compression spring 14 to engage a corresponding receiving aperture 16 in the other part of the cam phaser whenever the pin 10 and receiving aperture 16 are rotationally aligned.
  • the locking pin 10 includes a portion 18 dividing the bore 12 into a first chamber 20 on one side of said portion 18 and a second chamber 22 on an opposite side of said portion 18 defining an oil chamber communicating with a passageway 24 which can be selectively supplied with oil from the a source of pressurised oil, such as the engine oil pump, to automatically force the pin 10 from the receiving aperture 16 against the biasing force of the spring 14.
  • a check valve 100 is provided for selectively placing said chamber 22 in fluid communication with pressurised oil from the oil pump when the oil exceeds a predetermined level, as will be described below.
  • a passageway 15 extends from the first chamber 20 to a low pressure region to vent the first chamber 20 and allow rapid movement of the locking pin 10.
  • the check valve 100 is provided in an oil passageway having a first inlet 102 communicating with said source of pressurised oil, a first outlet 104 communicating with said chamber 22 and a second outlet 106 communicating with a low pressure vent or drain.
  • the check valve 100 includes a valve member 110 engageable with a first valve seat 112 when in a first position to close said first inlet 102 to prevent fluid communication between said source of pressurised oil and said chamber 22 when said valve member 110 engages said first valve seat 112, and engageable with a second valve seat 114 when in a second position to close said second outlet 106.
  • valve member 110 is biased towards the first valve seat 112 by means of a return spring 116 to close fluid communication between the chamber 22 and the source of pressurised oil when the oil pressure is too low for correct operation of the cam phaser, thus maintaining the locking pin 10 in its receiving aperture 16.
  • the check valve 100 may be mounted within a locking bolt for securing the cam phaser to the cam shaft, an 0-ring 118 being provided around the periphery of the locking bolt to seal against an inner face of the cam phaser to define part of said oil passageway.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
EP07252293A 2007-06-07 2007-06-07 Verriegelungsmechanismus für einen Nockenwellenversteller Withdrawn EP2006499A3 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07252293A EP2006499A3 (de) 2007-06-07 2007-06-07 Verriegelungsmechanismus für einen Nockenwellenversteller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07252293A EP2006499A3 (de) 2007-06-07 2007-06-07 Verriegelungsmechanismus für einen Nockenwellenversteller

Publications (2)

Publication Number Publication Date
EP2006499A2 true EP2006499A2 (de) 2008-12-24
EP2006499A3 EP2006499A3 (de) 2008-12-31

Family

ID=39881357

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07252293A Withdrawn EP2006499A3 (de) 2007-06-07 2007-06-07 Verriegelungsmechanismus für einen Nockenwellenversteller

Country Status (1)

Country Link
EP (1) EP2006499A3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2224105A1 (de) * 2009-02-26 2010-09-01 Aisin Seiki Kabushiki Kaisha Vorrichtung zur Regelung der Ventilsteuerzeit
US11230950B1 (en) 2021-01-22 2022-01-25 Borgwarner, Inc. Electrically-actuated variable camshaft timing phaser with removable fixture

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3917772B2 (ja) * 1999-02-04 2007-05-23 株式会社日立製作所 内燃機関の可変動弁装置
JP4017860B2 (ja) * 2000-12-25 2007-12-05 三菱電機株式会社 バルブタイミング調整装置
US6799544B1 (en) * 2003-05-29 2004-10-05 Delphi Technologies, Inc. Method and apparatus for actuating a cam phaser
US6966288B2 (en) * 2003-11-17 2005-11-22 Borgwarner Inc. Lock pin with centrifugally operated release valve
DE102004038252A1 (de) * 2004-05-14 2005-12-15 Ina-Schaeffler Kg Steuerventil für eine Vorrichtung zur Veränderung der Steuerzeiten einer Brennkraftmaschine
US20080135004A1 (en) * 2005-05-02 2008-06-12 Borgwarner Inc. Timing Phaser Control System

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2224105A1 (de) * 2009-02-26 2010-09-01 Aisin Seiki Kabushiki Kaisha Vorrichtung zur Regelung der Ventilsteuerzeit
US8281756B2 (en) 2009-02-26 2012-10-09 Aisin Seiki Kabushiki Kaisha Valve timing control apparatus
US11230950B1 (en) 2021-01-22 2022-01-25 Borgwarner, Inc. Electrically-actuated variable camshaft timing phaser with removable fixture
US11454142B2 (en) 2021-01-22 2022-09-27 Borgwarner, Inc. Electrically-actuated variable camshaft timing phaser with removable fixture

Also Published As

Publication number Publication date
EP2006499A3 (de) 2008-12-31

Similar Documents

Publication Publication Date Title
EP1930560B1 (de) Hydraulisches Steuersystem für Nockenwellenversteller
EP2977569B1 (de) Nockenwellenversteller
EP2075421A1 (de) Flüssigkeitssteuerungsventil für einen Nockenwellenversteller
US7318400B2 (en) Locking pin mechanism for a vane-type cam phaser
JP4661902B2 (ja) バルブタイミング調整装置
US7421989B2 (en) Vane-type cam phaser having increased rotational authority, intermediate position locking, and dedicated oil supply
CN102165146B (zh) 阀开闭定时控制装置
US8631773B2 (en) Valve timing adjuster
EP3018307B1 (de) Nockenwellenversteller
KR20140057169A (ko) 중앙에 위치된 잠금 핀 밸브 스풀을 구비한 캠샤프트 페이저
EP2711511A2 (de) rainure de centrage pour un moteur à combustion interne
US20190063270A1 (en) Camshaft phaser
EP1357260B1 (de) Verriegelungsstift eines Nockenwellenverstellers mit gekrümmter Entlüftungsstrecke zur Erzeugung einer hydraulischen Verzögerung
US10883395B2 (en) Hydraulically biased camshaft phaser
CN104343481A (zh) 阀开闭时期控制装置
US10337363B2 (en) Valve opening and closing timing control apparatus
EP2006499A2 (de) Verriegelungsmechanismus für einen Nockenwellenversteller
US6968818B2 (en) Camshaft adjuster
US10690019B2 (en) Zero pressure unlocking system for a phaser
US10494961B2 (en) Camshaft driven pump for a hydraulic cam phaser
KR101767464B1 (ko) 내연기관의 밸브타이밍 조정장치와 그 방법
JP5846247B2 (ja) バルブタイミング調整装置
JP2003222010A (ja) バルブタイミング調整装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20090701