EP0918141A3 - Coupling device for cam shafts in internal combustion engines - Google Patents

Coupling device for cam shafts in internal combustion engines Download PDF

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Publication number
EP0918141A3
EP0918141A3 EP98119438A EP98119438A EP0918141A3 EP 0918141 A3 EP0918141 A3 EP 0918141A3 EP 98119438 A EP98119438 A EP 98119438A EP 98119438 A EP98119438 A EP 98119438A EP 0918141 A3 EP0918141 A3 EP 0918141A3
Authority
EP
European Patent Office
Prior art keywords
internal combustion
drive wheel
combustion engines
locking bolts
camshaft
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Withdrawn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
EP98119438A
Other languages
German (de)
French (fr)
Other versions
EP0918141A2 (en
Inventor
Dieter Dipl.-Ing. Voigt
Rudolf Dr. Krebs
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.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP0918141A2 publication Critical patent/EP0918141A2/en
Publication of EP0918141A3 publication Critical patent/EP0918141A3/en
Withdrawn legal-status Critical Current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
    • F01L1/34409—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 by torque-responsive means
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

Die Erfindung betrifft eine Kupplungseinrichtung für Nockenwellen in Brennkraftmaschinen, bei der die Nockenwelle (1) relativ zu einem von der Kurbelwelle der Brennkraftmaschine angetriebenen Antriebsrad (2) über einen begrenzten Drehwinkelbereich in beiden Drehrichtungen frei zum Antriebsrad (2) durch Drehungleichförmigkeiten verstellbar und über öldruckgeschaltete Rastbolzen (4,5) fixierbar ist.
Es wird die Aufgabe gelöst die Rastbolzen (4,5) und deren Betätigung konstruktiv zu vereinfachen und einen sicheren Eingriff der Rastelemente zu gewährleisten.The invention relates to a clutch device for camshafts in internal combustion engines, in which the camshaft (1) is freely adjustable relative to a drive wheel (2) driven by the crankshaft of the internal combustion engine over a limited range of rotation angles in both directions of rotation to the drive wheel (2) by means of rotational nonuniformities and via oil pressure switched locking bolts (4,5) can be fixed.
The problem is solved to simplify the design of the locking bolts (4, 5) and their actuation and to ensure that the locking elements engage securely.

Erfindungsgemäß wird dies dadurch erreicht, daß in das Antriebsrad (2) mindestens zwei schiebbar geführte federbelastete Rastbolzen (4,5) wechselweise in korrespondierende Ausnehmungen (7,8) der Nockenwelle (1) eingreifen. Diese Ausnehmungen (7,8) sind mit Druckmittelkanälen (13,14) verbunden, die über einen Schaltkolben (12) wechselweise mit einer Druckmittelquelle in Verbindung bringbar sind, um den jeweiligen Rastbolzen (4,5) auszukoppeln.

Figure 00000001
According to the invention, this is achieved in that at least two slidably guided spring-loaded locking pins (4, 5) alternately engage in corresponding recesses (7, 8) of the camshaft (1) in the drive wheel (2). These recesses (7, 8) are connected to pressure medium channels (13, 14), which can alternately be connected to a pressure medium source via a switching piston (12) in order to decouple the respective locking bolts (4, 5).
Figure 00000001
EP98119438A 1997-11-22 1998-10-15 Coupling device for cam shafts in internal combustion engines Withdrawn EP0918141A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19751836 1997-11-22
DE1997151836 DE19751836A1 (en) 1997-11-22 1997-11-22 Coupling device for camshafts in internal combustion engines

Publications (2)

Publication Number Publication Date
EP0918141A2 EP0918141A2 (en) 1999-05-26
EP0918141A3 true EP0918141A3 (en) 1999-07-14

Family

ID=7849544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98119438A Withdrawn EP0918141A3 (en) 1997-11-22 1998-10-15 Coupling device for cam shafts in internal combustion engines

Country Status (2)

Country Link
EP (1) EP0918141A3 (en)
DE (1) DE19751836A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005054269B3 (en) * 2005-11-11 2007-06-21 Thyssenkrupp Automotive Ag Device for changing the relative angular position of a camshaft relative to a crankshaft of an internal combustion engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4858572A (en) * 1987-09-30 1989-08-22 Aisin Seiki Kabushiki Kaisha Device for adjusting an angular phase difference between two elements
DE3930157A1 (en) * 1989-09-09 1991-03-21 Bosch Gmbh Robert DEVICE FOR ADJUSTING THE TURNING ANGLE ASSIGNMENT OF A CAMSHAFT TO YOUR DRIVE ELEMENT
DE4112813A1 (en) * 1991-04-19 1992-10-22 Audi Ag DEVICE FOR ADJUSTING THE TIMING TIMES IN A TIMING DRIVE
DE19623818A1 (en) * 1995-06-14 1996-12-19 Nippon Denso Co Control device for varying a rotational or angular phase between two rotating shafts, preferably applicable to a valve timing control device for an internal combustion engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19618189A1 (en) 1995-05-12 1996-11-14 Volkswagen Ag Gas valve cut=off system via camshaft and coupling
DE19604991A1 (en) * 1996-02-12 1997-08-14 Dummann Hans Peter Variable valve control for internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4858572A (en) * 1987-09-30 1989-08-22 Aisin Seiki Kabushiki Kaisha Device for adjusting an angular phase difference between two elements
DE3930157A1 (en) * 1989-09-09 1991-03-21 Bosch Gmbh Robert DEVICE FOR ADJUSTING THE TURNING ANGLE ASSIGNMENT OF A CAMSHAFT TO YOUR DRIVE ELEMENT
DE4112813A1 (en) * 1991-04-19 1992-10-22 Audi Ag DEVICE FOR ADJUSTING THE TIMING TIMES IN A TIMING DRIVE
DE19623818A1 (en) * 1995-06-14 1996-12-19 Nippon Denso Co Control device for varying a rotational or angular phase between two rotating shafts, preferably applicable to a valve timing control device for an internal combustion engine

Also Published As

Publication number Publication date
DE19751836A1 (en) 1999-05-27
EP0918141A2 (en) 1999-05-26

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