IT1391573B1 - Dispositivo meccanico per la variazione della fase e dell'alzata delle valvole in un motore a combustione interna - Google Patents

Dispositivo meccanico per la variazione della fase e dell'alzata delle valvole in un motore a combustione interna

Info

Publication number
IT1391573B1
IT1391573B1 ITMI2008A001605A ITMI20081605A IT1391573B1 IT 1391573 B1 IT1391573 B1 IT 1391573B1 IT MI2008A001605 A ITMI2008A001605 A IT MI2008A001605A IT MI20081605 A ITMI20081605 A IT MI20081605A IT 1391573 B1 IT1391573 B1 IT 1391573B1
Authority
IT
Italy
Prior art keywords
component
camshaft
valves
phase
combustion engine
Prior art date
Application number
ITMI2008A001605A
Other languages
English (en)
Inventor
Paolo Nesti
Original Assignee
Piaggio & C Spa
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 Piaggio & C Spa filed Critical Piaggio & C Spa
Priority to ITMI2008A001605A priority Critical patent/IT1391573B1/it
Priority to EP09169643A priority patent/EP2161434B1/en
Priority to AT09169643T priority patent/ATE537346T1/de
Priority to ES09169643T priority patent/ES2379146T3/es
Publication of ITMI20081605A1 publication Critical patent/ITMI20081605A1/it
Application granted granted Critical
Publication of IT1391573B1 publication Critical patent/IT1391573B1/it

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • 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
    • F01L1/053—Camshafts overhead type
    • 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
    • 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
    • F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L13/0042—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams being profiled in axial and radial direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0203—Variable control of intake and exhaust valves
    • F02D13/0207—Variable control of intake and exhaust valves changing valve lift or valve lift and timing
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • 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
    • F01L1/20—Adjusting or compensating clearance
    • 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
    • F01L1/053—Camshafts overhead type
    • F01L2001/0535—Single overhead camshafts [SOHC]
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
ITMI2008A001605A 2008-09-09 2008-09-09 Dispositivo meccanico per la variazione della fase e dell'alzata delle valvole in un motore a combustione interna IT1391573B1 (it)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ITMI2008A001605A IT1391573B1 (it) 2008-09-09 2008-09-09 Dispositivo meccanico per la variazione della fase e dell'alzata delle valvole in un motore a combustione interna
EP09169643A EP2161434B1 (en) 2008-09-09 2009-09-07 Mechanical device for the phase and lifting variation of the valves in an internal combustion engine
AT09169643T ATE537346T1 (de) 2008-09-09 2009-09-07 Mechanische vorrichtung zur änderung der phase und der anhebung von ventilen in verbrennungsmotoren
ES09169643T ES2379146T3 (es) 2008-09-09 2009-09-07 Dispositivo mecánico para la variación de fase y de elevación de las válvulas en un motor de combustión interna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2008A001605A IT1391573B1 (it) 2008-09-09 2008-09-09 Dispositivo meccanico per la variazione della fase e dell'alzata delle valvole in un motore a combustione interna

Publications (2)

Publication Number Publication Date
ITMI20081605A1 ITMI20081605A1 (it) 2010-03-10
IT1391573B1 true IT1391573B1 (it) 2012-01-11

Family

ID=40580891

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI2008A001605A IT1391573B1 (it) 2008-09-09 2008-09-09 Dispositivo meccanico per la variazione della fase e dell'alzata delle valvole in un motore a combustione interna

Country Status (4)

Country Link
EP (1) EP2161434B1 (it)
AT (1) ATE537346T1 (it)
ES (1) ES2379146T3 (it)
IT (1) IT1391573B1 (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011003558A1 (de) * 2011-02-03 2012-08-09 Schaeffler Technologies Gmbh & Co. Kg Nockenwellen- oder Nockenverstellmechanismus mit Schlingfedern
GB2510364B (en) * 2013-01-31 2017-08-30 Jaguar Land Rover Ltd A device for effecting an axial shift of a rotary shaft for use in a variable camshaft drive mechanism

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2950656A1 (de) * 1979-12-15 1981-06-19 Daimler-Benz Ag, 7000 Stuttgart Brennkraftmaschinen mit auf der nockenwelle drehbar gelagerten nocken
JPS60147512A (ja) * 1984-01-12 1985-08-03 Yamaha Motor Co Ltd ４サイクルエンジンの可変バルブタイミング装置
JP2880005B2 (ja) * 1991-07-22 1999-04-05 本田技研工業株式会社 エンジンのデコンプ装置
LV13238B (en) * 2004-08-06 2004-12-20 Arnis Treijs Mechanical device for distribution of gases that automatically changes phases of intake/exhaust depending of workload and speed of engine

Also Published As

Publication number Publication date
ITMI20081605A1 (it) 2010-03-10
ES2379146T3 (es) 2012-04-23
ATE537346T1 (de) 2011-12-15
EP2161434B1 (en) 2011-12-14
EP2161434A1 (en) 2010-03-10

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