EP0903470A1 - Dispositif pour varier le calage d'un arbre à cames de moteur à combustion interne - Google Patents

Dispositif pour varier le calage d'un arbre à cames de moteur à combustion interne Download PDF

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Publication number
EP0903470A1
EP0903470A1 EP98890261A EP98890261A EP0903470A1 EP 0903470 A1 EP0903470 A1 EP 0903470A1 EP 98890261 A EP98890261 A EP 98890261A EP 98890261 A EP98890261 A EP 98890261A EP 0903470 A1 EP0903470 A1 EP 0903470A1
Authority
EP
European Patent Office
Prior art keywords
camshaft
threaded section
drive wheel
adjusting element
component
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
EP98890261A
Other languages
German (de)
English (en)
Other versions
EP0903470B1 (fr
Inventor
Siegfried Ing. Heer
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.)
TCG Unitech AG
Original Assignee
TCG Unitech AG
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 TCG Unitech AG filed Critical TCG Unitech AG
Priority to AT98890261T priority Critical patent/ATE249573T1/de
Publication of EP0903470A1 publication Critical patent/EP0903470A1/fr
Application granted granted Critical
Publication of EP0903470B1 publication Critical patent/EP0903470B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01L1/352—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 bevel or epicyclic gear
    • 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
    • F01L1/34406—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 the helically teethed sleeve being located in the camshaft driving pulley
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/032—Electric motors

Definitions

  • the present invention relates to a device for adjusting a camshaft Internal combustion engine with respect to the drive wheel driving it, with an adjusting element that engages on the one hand with a component carrying the drive wheel stands, and on the other hand with a component firmly connected to the camshaft in Engagement is, with an axial displacement of the adjusting element a rotation of the Camshaft can be effected relative to the drive wheel, as well as with an electric motor Displacement of the adjusting element in the axial direction, which is firmly connected to the camshaft and is supplied with power via sliding contacts.
  • the camshaft of an internal combustion engine is usually driven by a sprocket is connected to the crankshaft via a drive chain, or one designed as a pulley Drive wheel, which is connected to the crankshaft via a toothed belt, driven.
  • GB 2 221 513 A shows an adjusting device for camshafts, in which an electric motor operates a group of levers that rotate the camshaft relative to the drive wheel.
  • an actuating element on which the levers are articulated, in Axial direction shifted.
  • Adjustment devices are known from DE 41 10 088 C1 and from DE 39 29 619 A1, where between a component connected to the camshaft and a an adjusting element is provided with the drive wheel in connection with the component has two helical gears with the corresponding gears of the camshaft or the drive wheel are engaged.
  • This adjustment element can cause the camshaft to rotate relative to the drive wheel become.
  • One possibility of the axial displacement of the adjusting element is actuation by a hydraulic piston, which depends on the required adjustment is operated.
  • the disadvantage of this solution is that to achieve the required forces relatively large hydraulic piston is required, which is a great deal of construction represents.
  • the oil consumption by the operation of the piston is relatively large, what represents a load on the engine by an appropriate oil pump.
  • the camshaft only between two end positions be switched back and forth.
  • an electrical adjustment device is known from DE 41 01 676 A1, in which a Electric motor is provided, which moves the adjusting element via a threaded spindle.
  • a Electric motor is provided, which moves the adjusting element via a threaded spindle.
  • the adjusting element rotates essentially at the camshaft speed, it must an axial thrust bearing can be provided between the electric motor and the adjusting element, that absorbs the relative movement between the torsion-resistant and the rotating component.
  • This thrust bearing is in the known solution practically throughout Engine operation is loaded because of the torsional moments acting between the drive wheel and the camshaft always exerted a force acting in the axial direction on the adjusting element becomes. This thrust bearing is therefore a critical part of the life of the engine restricted.
  • a similar solution is described in DE 33 20 835 A1, the same Disadvantages occur.
  • the object of the present invention is to provide a device of the type mentioned above to further develop that with comparatively simple means a safe and reliable adjustment the camshaft is reached without restricting the life of the engine.
  • the adjusting element has a first Threaded section which is connected to a threaded section of which is firmly connected to the camshaft Component is engaged as well as a second threaded section that with a threaded section of the component carrying the drive wheel is engaged.
  • the electric motor is fundamentally compatible with the Camshaft rotates and that due to the large reduction that the two Given threaded sections, a relatively low torque load on the electric motor is achievable. In this way, a complex transmission of the actuating force can be achieved avoided by a non-rotating electric motor on the rotating camshaft become.
  • the system of the invention is self-locking, so that an undesirable adjustment of the System cannot take place. Furthermore, the system does not require any rolling bearings that control the speed the camshaft.
  • the rolling bearings of the system run as a whole with camshaft speed and only have to absorb the rotation of the electric motor.
  • the camshaft is connected to a flange that the electric motor with a sleeve-shaped component is connected and that the flange via connecting elements through the drive wheel pass through, is firmly connected to the sleeve-shaped component.
  • bolts enter the flange with the sleeve connect through arcuate slots in the drive wheel.
  • the electric motor is firmly connected to the drive wheel and is supplied with power via sliding contacts.
  • the electric motor can be flanged directly to the drive wheel become, which facilitates the constructive training.
  • the housing of the electric motor turns not exactly with the speed of the camshaft, but with the speed of the drive wheel, which, however, is not a significant difference in practice.
  • the drive shaft of the motor has a helical toothing Has threaded section which engages with a threaded section of the adjusting element stands. In this way, a very large reduction from a high-speed electric motor in a corresponding axial movement of the adjusting element.
  • the electric motor is designed as a stepper motor, which makes this possible easy control and reliable operation.
  • the electric motor can be advantageous to use the electric motor as a geared motor to train. Thanks to the integrated reduction gear, a high-speed Electric motor operated with particularly low moments.
  • FIG. 1 a section through an embodiment variant of the present invention.
  • a camshaft, not shown, of an internal combustion engine has a flange 2 at one end.
  • a camshaft drive component is located above a screw 3 4 firmly connected to the camshaft 1.
  • the component 4 is on one of his outer circumferential helical thread section 4a with a threaded section 5a of the adjusting element 5 in engagement.
  • the adjusting element 5 encompasses the component 4 and in turn has a threaded section 5b on its outer circumference.
  • This thread section 5b stands with a threaded section 6b of the drive wheel 6 for the camshaft 1 engaged, which is designed as a sprocket. Engages in the teeth 6a of the chain wheel 6 a drive chain, not shown.
  • a precisely defined one is defined via the drive chain Position of the drive wheel 6 in relation to the rotation of the crankshaft, which is also not is guaranteed.
  • the inner threaded section 5a of the adjusting element 5 is in opposite directions to the outer threaded portion 5b, so that by an axial displacement of the adjusting element 5 a rotation of the camshaft 1 with respect to the drive wheel 6 takes place.
  • a sleeve 7 is firmly connected to the flange 2 of the camshaft 1.
  • the Connection is via threaded bolts 8, which are screwed into the flange 2, and with a nut 9 are attached to the sleeve 7.
  • the threaded bolts 8 pass through bores 10 in the drive wheel 6, which bores 10 are formed as circular arc-shaped elongated holes are trained.
  • Spacers 11, 12 and 13 provide a precisely defined distance between the sleeve 7 and the flange 2 ago.
  • the spacer 12 is made smaller than the width of the elongated hole 10, while the spacers 11 and 13 have a larger diameter exhibit.
  • the width of the spacer 12 corresponds exactly to the thickness of the drive wheel 6 in this section, so that the axial position of the drive wheel is set without play is.
  • a spindle 14 has an external thread 14a, via which it with the adjusting element 5 is engaged.
  • the spindle 14 is driven by an electric motor 15, which is fixed is connected to the sleeve 7.
  • the connection is made via screws 16 that hold the electric motor 15 connect with a connecting component 17 fastened to the sleeve 7.
  • the spindle 14 is a roller bearing 20 in the radial direction stored relative to component 17.
  • a locking ring 21 secures the outer ring of the Rolling bearing 20.
  • the spindle 14 In the axial direction, the spindle 14 is in position by an axial bearing 22 fixed.
  • the axial bearing 22 is based on the one hand on a shoulder of the sleeve 7 against the washer 23, and on the other hand onto a washer 24 which is supported by a nut 25 the sleeve 7 is connected.
  • a shaft seal ring 26 prevents the penetration of engine oil to the electric motor 15.
  • the outer circumference of the shaft sealing ring 26 is connected to the sleeve 7 attached.
  • a nut 27 puts the exact axial position of the spindle 14 in over a sleeve 28 Regarding the thrust bearing 22 fixed.
  • the engine 15 is firmly connected to the camshaft 1.
  • the output shaft 29 of the motor 15 rotates Spindle 14.
  • the rotation of the spindle 14 relative to the camshaft 1 causes it moves the adjusting element 5 along the threaded section 14a in the axial direction, for example to the left in FIG. 1.
  • This displacement causes the Component 4, relative to the drive wheel 6 due to the opposite thread sections 4a / 5a or 6b / 5b. In this way, the camshaft 1 is adjusted with respect to the drive wheel 6.
  • the present invention makes it possible to control the valve timing of an internal combustion engine easy and safe to change. It is particularly advantageous that any Intermediate positions can be controlled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP98890261A 1997-09-19 1998-09-10 Dispositif pour varier le calage d'un arbre à cames de moteur à combustion interne Expired - Lifetime EP0903470B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT98890261T ATE249573T1 (de) 1997-09-19 1998-09-10 Vorrichtung zur verstellung einer nockenwelle einer brennkraftmaschine mit innerer verbrennung

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT158697 1997-09-19
AT0158697A AT407282B (de) 1997-09-19 1997-09-19 Vorrichtung zur verstellung einer nockenwelle
AT1586/97 1997-09-19

Publications (2)

Publication Number Publication Date
EP0903470A1 true EP0903470A1 (fr) 1999-03-24
EP0903470B1 EP0903470B1 (fr) 2003-09-10

Family

ID=3516627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98890261A Expired - Lifetime EP0903470B1 (fr) 1997-09-19 1998-09-10 Dispositif pour varier le calage d'un arbre à cames de moteur à combustion interne

Country Status (4)

Country Link
US (1) US5979382A (fr)
EP (1) EP0903470B1 (fr)
AT (2) AT407282B (fr)
DE (1) DE59809548D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT409786B (de) * 1999-03-23 2002-11-25 Tcg Unitech Ag Vorrichtung zur verstellung einer nockenwelle einer brennkraftmaschine mit innerer verbrennung
FR3027055A1 (fr) * 2014-10-14 2016-04-15 Renault Sa Commande de decalage d'instants d'ouverture/fermeture de soupapes d'un moteur de vehicule automobile

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE210243T1 (de) * 1997-09-19 2001-12-15 Tcg Unitech Ag Vorrichtung zur verstellung der nockenwelle einer brennkraftmaschine mit innerer verbrennung
US6257186B1 (en) * 1999-03-23 2001-07-10 Tcg Unitech Aktiengesellschaft Device for adjusting the phase angle of a camshaft of an internal combustion engine
US6302073B1 (en) * 1999-03-23 2001-10-16 Tcg Unitech Aktiengesellschaft Device for adjusting the phase angle of a camshaft of an internal combustion engine
US6328006B1 (en) * 1999-03-23 2001-12-11 Tcg Unitech Aktiengesellschaft Device for adjusting the phase angle of a camshaft of an internal combustion engine
US6199522B1 (en) * 1999-08-27 2001-03-13 Daimlerchrysler Corporation Camshaft phase controlling device
US6202611B1 (en) * 1999-12-23 2001-03-20 Daimlerchrysler Corporation Camshaft drive device for an internal combustion engine
DE10116707B4 (de) * 2001-04-04 2017-01-19 Schaeffler Technologies AG & Co. KG Vorrichtung zur Relativverdrehung einer Nockenwelle gegenüber einer Kurbelwelle einer Brennkraftmaschine
DE10207760B4 (de) * 2002-02-23 2019-10-31 Schaeffler Technologies AG & Co. KG Vorrichtung zum lösbaren Verbinden und Verstellen zweier zueinander drehwinkelverstellbarer Wellen
DE10220687A1 (de) * 2002-05-10 2003-11-20 Ina Schaeffler Kg Nockenwellenversteller mit elektrischem Antrieb
JP4012445B2 (ja) * 2002-08-13 2007-11-21 株式会社日立製作所 内燃機関の可変動弁装置
JP4240488B2 (ja) * 2005-02-01 2009-03-18 株式会社デンソー バルブリフト制御装置のアクチュエータ
DE102008060219B4 (de) 2008-12-04 2011-07-14 Pierburg GmbH, 41460 Vorrichtung zur Phasenverschiebung des Drehwinkels eines Antriebsrades zu einer Abtriebswelle
JP4987031B2 (ja) * 2009-04-27 2012-07-25 日立オートモティブシステムズ株式会社 内燃機関のバルブタイミング制御装置
US9534513B2 (en) * 2014-01-16 2017-01-03 Delphi Technologies, Inc. Camshaft phaser actuated by an electric motor

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978829A (en) * 1974-06-10 1976-09-07 Nissan Motor Co., Ltd. Self-adjustable camshaft drive mechanism
DE3320835A1 (de) 1983-06-09 1984-12-13 Dieter 7460 Balingen Fuoß Multipositionsantrieb
US4561390A (en) * 1982-11-12 1985-12-31 Toyota Jidosha Kabushiki Kaisha Variable valve-timing apparatus in an internal combustion engine
DE3607256A1 (de) 1986-03-05 1987-09-10 Bayerische Motoren Werke Ag Vorrichtung zum gesteuerten/geregelten verstellen der relativen drehlage eines getriebenen zu einem treibenden maschinenteil
GB2221513A (en) 1988-08-05 1990-02-07 Ford Motor Co Variable phase drive mechanism
US4967701A (en) * 1989-01-12 1990-11-06 Nippondenso Co., Ltd. Valve timing adjuster
DE3929619A1 (de) 1989-09-06 1991-03-07 Bayerische Motoren Werke Ag Kuppelstange fuer eine vorrichtung zur drehwinkelverstellung einer welle relativ zu einem antriebsrad, insbesondere nockenwelle einer brennkraftmaschine
DE4110088C1 (en) 1991-03-27 1992-07-09 Bayerische Motoren Werke Ag, 8000 Muenchen, De Relative shaft bearing position changing mechanism - has annular coupler with inner and outer toothing linked to axially displaceable piston
EP0596860A2 (fr) * 1986-02-19 1994-05-11 Clemson University Méthode pour varier le calage des soupapes d'un moteur à combustion interne

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111780A (en) * 1988-07-15 1992-05-12 Audi Ag Drive arrangement for a camshaft in an internal combustion engine
DE4101676A1 (de) * 1991-01-22 1992-07-23 Schaeffler Waelzlager Kg Verstellvorrichtung fuer eine nockenwelle
DE4110195C2 (de) * 1991-03-28 2000-02-10 Schaeffler Waelzlager Ohg Verstellvorrichtung für eine Nockenwelle
US5117784A (en) * 1991-05-03 1992-06-02 Ford Motor Company Internal combustion engine camshaft phaseshift control system
DE4311264C2 (de) * 1993-04-06 2002-08-29 Bosch Gmbh Robert Vorrichtung zur Drehlagenänderung einer Gaswechselventile einer Brennkraftmaschine steuernden Steuerwelle
DE4331977A1 (de) * 1993-09-21 1995-03-23 Porsche Ag Variable Ventilsteuerung
US5673659A (en) * 1995-06-22 1997-10-07 Chrysler Corporation Lead screw driven shaft phase control mechanism
US5803030A (en) * 1997-01-10 1998-09-08 Cole; Kenneth Wade Phase adjustable cam drive

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978829A (en) * 1974-06-10 1976-09-07 Nissan Motor Co., Ltd. Self-adjustable camshaft drive mechanism
US4561390A (en) * 1982-11-12 1985-12-31 Toyota Jidosha Kabushiki Kaisha Variable valve-timing apparatus in an internal combustion engine
DE3320835A1 (de) 1983-06-09 1984-12-13 Dieter 7460 Balingen Fuoß Multipositionsantrieb
EP0596860A2 (fr) * 1986-02-19 1994-05-11 Clemson University Méthode pour varier le calage des soupapes d'un moteur à combustion interne
DE3607256A1 (de) 1986-03-05 1987-09-10 Bayerische Motoren Werke Ag Vorrichtung zum gesteuerten/geregelten verstellen der relativen drehlage eines getriebenen zu einem treibenden maschinenteil
GB2221513A (en) 1988-08-05 1990-02-07 Ford Motor Co Variable phase drive mechanism
US4967701A (en) * 1989-01-12 1990-11-06 Nippondenso Co., Ltd. Valve timing adjuster
DE3929619A1 (de) 1989-09-06 1991-03-07 Bayerische Motoren Werke Ag Kuppelstange fuer eine vorrichtung zur drehwinkelverstellung einer welle relativ zu einem antriebsrad, insbesondere nockenwelle einer brennkraftmaschine
DE4110088C1 (en) 1991-03-27 1992-07-09 Bayerische Motoren Werke Ag, 8000 Muenchen, De Relative shaft bearing position changing mechanism - has annular coupler with inner and outer toothing linked to axially displaceable piston

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT409786B (de) * 1999-03-23 2002-11-25 Tcg Unitech Ag Vorrichtung zur verstellung einer nockenwelle einer brennkraftmaschine mit innerer verbrennung
FR3027055A1 (fr) * 2014-10-14 2016-04-15 Renault Sa Commande de decalage d'instants d'ouverture/fermeture de soupapes d'un moteur de vehicule automobile

Also Published As

Publication number Publication date
ATA158697A (de) 2000-06-15
US5979382A (en) 1999-11-09
ATE249573T1 (de) 2003-09-15
AT407282B (de) 2001-02-26
EP0903470B1 (fr) 2003-09-10
DE59809548D1 (de) 2003-10-16

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