EP2484874A3 - Cam shaft or cam adjustment mechanism with looped springs - Google Patents

Cam shaft or cam adjustment mechanism with looped springs Download PDF

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Publication number
EP2484874A3
EP2484874A3 EP11190463A EP11190463A EP2484874A3 EP 2484874 A3 EP2484874 A3 EP 2484874A3 EP 11190463 A EP11190463 A EP 11190463A EP 11190463 A EP11190463 A EP 11190463A EP 2484874 A3 EP2484874 A3 EP 2484874A3
Authority
EP
European Patent Office
Prior art keywords
cam
shaft
flyweight
adjustment mechanism
intake
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
EP11190463A
Other languages
German (de)
French (fr)
Other versions
EP2484874A2 (en
EP2484874B1 (en
Inventor
Claudia Zielinski
Michael Bogner
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2484874A2 publication Critical patent/EP2484874A2/en
Publication of EP2484874A3 publication Critical patent/EP2484874A3/en
Application granted granted Critical
Publication of EP2484874B1 publication Critical patent/EP2484874B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F01L1/34413—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 composite camshafts, e.g. with cams being able to move relative to the 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
    • F01L1/34416—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 twisted cams
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0057—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by splittable or deformable cams
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0471—Assembled camshafts
    • F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
    • 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
    • F01L2820/035—Centrifugal forces

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)

Abstract

Die Erfindung betrifft einen Nockenverstellmechanismus (1) mit einer eine Rotationsachse (3) umfassenden Welle (2), wie einer Nockenwelle, einem wellenfesten Auslassnocken, einem Einlassnocken (4), der innerhalb eines festgelegten Bereichs drehbar auf der Welle (2) gelagert ist, und zumindest einem Fliehgewicht (12), wobei das Fliehgewicht (12) derart in Wirkbeziehung mit dem Einlassnocken (4) steht, dass eine Auslenkung des Fliehgewichts (12) bei einer entsprechenden Rotationsgeschwindigkeit der Welle (2) zu einem Verstellen des Einlassnockens (4) relativ zum Auslassnocken führt, wobei ein fliehkraftabhängig in seiner Blockierrichtung verstellbarer Freilauf (5) zwischen den Einlassnocken (4) und der Welle (2) geschalten ist. Die Erfindung betrifft auch eine Einzylinder-Verbrennungskraftmachine mit einer einzelnen, obenliegenden Nockenwelle für ein Motorrad mit einem solchen Nockenverstellmechanismus.

Figure imgaf001
The invention relates to a cam displacement mechanism (1) having a shaft (2) comprising a rotation axis (3), such as a cam shaft, a shaft-fixed exhaust cam, an intake cam (4) rotatably mounted on the shaft (2) within a predetermined range, and at least one flyweight (12), wherein the flyweight (12) is in operative relationship with the intake cam (4) such that a deflection of the flyweight (12) at a corresponding rotational speed of the shaft (2) results in an adjustment of the intake cam (4). relative to the exhaust cam leads, wherein a centrifugal force dependent in its blocking direction adjustable freewheel (5) between the inlet cam (4) and the shaft (2) is connected. The invention also relates to a single cylinder internal combustion engine having a single, overhead camshaft for a motorcycle having such a cam timing mechanism.
Figure imgaf001
EP20110190463 2011-02-03 2011-11-24 Cam shaft or cam adjustment mechanism with looped springs Not-in-force EP2484874B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201110003558 DE102011003558A1 (en) 2011-02-03 2011-02-03 Camshaft or cam adjustment mechanism with wrap springs

Publications (3)

Publication Number Publication Date
EP2484874A2 EP2484874A2 (en) 2012-08-08
EP2484874A3 true EP2484874A3 (en) 2013-01-23
EP2484874B1 EP2484874B1 (en) 2013-10-16

Family

ID=45063014

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110190463 Not-in-force EP2484874B1 (en) 2011-02-03 2011-11-24 Cam shaft or cam adjustment mechanism with looped springs

Country Status (2)

Country Link
EP (1) EP2484874B1 (en)
DE (1) DE102011003558A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016205785A1 (en) 2016-04-07 2017-10-12 Schaeffler Technologies AG & Co. KG Phaser

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3933923A1 (en) * 1989-09-29 1991-04-11 Ingelheim Peter Graf Von Variable timing IC engine valve gear - uses spring and balance mechanism actuated by centrifugal force
EP1956197A1 (en) * 2005-11-28 2008-08-13 Yamaha Hatsudoki Kabushiki Kaisha Adjustable valve device, and engine device and vehicle using the same
DE102008020909A1 (en) * 2008-04-17 2009-10-29 Weber Technology Ag Decompression device for two-cylinder internal-combustion engine, has cam shaft exhibiting eccentric shafts that convert movement of centrifugal force element into radial movement of valve lifters
US20100025138A1 (en) * 2008-07-29 2010-02-04 Ruscak Ian M Centrifugal advance mechanism
EP2161434A1 (en) * 2008-09-09 2010-03-10 PIAGGIO & C. S.p.A. Mechanical device for the phase and lifting variation of the valves in an internal combustion engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09324614A (en) 1996-06-04 1997-12-16 Tochigi Fuji Ind Co Ltd Rotational phase generator
JP4948831B2 (en) 2005-12-13 2012-06-06 ヤマハ発動機株式会社 Variable valve operating apparatus and engine system and vehicle including the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3933923A1 (en) * 1989-09-29 1991-04-11 Ingelheim Peter Graf Von Variable timing IC engine valve gear - uses spring and balance mechanism actuated by centrifugal force
EP1956197A1 (en) * 2005-11-28 2008-08-13 Yamaha Hatsudoki Kabushiki Kaisha Adjustable valve device, and engine device and vehicle using the same
DE102008020909A1 (en) * 2008-04-17 2009-10-29 Weber Technology Ag Decompression device for two-cylinder internal-combustion engine, has cam shaft exhibiting eccentric shafts that convert movement of centrifugal force element into radial movement of valve lifters
US20100025138A1 (en) * 2008-07-29 2010-02-04 Ruscak Ian M Centrifugal advance mechanism
EP2161434A1 (en) * 2008-09-09 2010-03-10 PIAGGIO & C. S.p.A. Mechanical device for the phase and lifting variation of the valves in an internal combustion engine

Also Published As

Publication number Publication date
EP2484874A2 (en) 2012-08-08
EP2484874B1 (en) 2013-10-16
DE102011003558A1 (en) 2012-08-09

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