EP1783332A4 - Oscillating cam and dynamic valve mechanism of internal combustion engine - Google Patents

Oscillating cam and dynamic valve mechanism of internal combustion engine

Info

Publication number
EP1783332A4
EP1783332A4 EP04772154A EP04772154A EP1783332A4 EP 1783332 A4 EP1783332 A4 EP 1783332A4 EP 04772154 A EP04772154 A EP 04772154A EP 04772154 A EP04772154 A EP 04772154A EP 1783332 A4 EP1783332 A4 EP 1783332A4
Authority
EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
valve mechanism
dynamic valve
oscillating cam
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
EP04772154A
Other languages
German (de)
French (fr)
Other versions
EP1783332A1 (en
EP1783332B1 (en
Inventor
Koichi Hatamura
Hideo Fujita
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.)
Yamaha Motor Co Ltd
Hatamura Koichi
Original Assignee
Yamaha Motor Co Ltd
Hatamura Koichi
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 Yamaha Motor Co Ltd, Hatamura Koichi filed Critical Yamaha Motor Co Ltd
Publication of EP1783332A1 publication Critical patent/EP1783332A1/en
Publication of EP1783332A4 publication Critical patent/EP1783332A4/en
Application granted granted Critical
Publication of EP1783332B1 publication Critical patent/EP1783332B1/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
    • 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
    • F01L13/0063—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 modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • 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
    • F01L1/08—Shape of 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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
    • F01L1/185—Overhead end-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
    • 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
    • F01L13/0063—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 modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F01L2013/0068—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 modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" 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
    • F01L2305/00—Valve arrangements comprising rollers
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant

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

A rocking cam includes a cam surface having a base circle portion and a lift portion, and is disposed so as to make reciprocating motion, in which a width of a contact surface of the base circle portion is formed smaller than a width of a contact surface of the lift portion.
EP04772154A 2004-08-25 2004-08-25 Oscillating cam and dynamic valve mechanism of internal combustion engine Not-in-force EP1783332B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2004/012193 WO2006021997A1 (en) 2004-08-25 2004-08-25 Oscillating cam and dynamic valve mechanism of internal combustion engine

Publications (3)

Publication Number Publication Date
EP1783332A1 EP1783332A1 (en) 2007-05-09
EP1783332A4 true EP1783332A4 (en) 2010-06-02
EP1783332B1 EP1783332B1 (en) 2011-04-27

Family

ID=35967220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04772154A Not-in-force EP1783332B1 (en) 2004-08-25 2004-08-25 Oscillating cam and dynamic valve mechanism of internal combustion engine

Country Status (5)

Country Link
EP (1) EP1783332B1 (en)
AT (1) ATE507371T1 (en)
CA (1) CA2541726A1 (en)
DE (1) DE602004032479D1 (en)
WO (1) WO2006021997A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018510A1 (en) * 2006-04-21 2007-10-25 Schaeffler Kg Swinging arm for stroke-variable valve gear of internal combustion engine, has stroke area, where maximum width of stroke area is formed larger or equal to maximum width of idle-stroke area and larger than minimum width of idle-stroke area
DE102007033821B4 (en) * 2007-07-18 2013-10-31 Hydraulik-Ring Gmbh Working curve of a variable valve train
CN103089365B (en) * 2013-02-28 2015-05-06 长城汽车股份有限公司 Actuating mechanism of variable valve stroke drive device for engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3380582B2 (en) * 1993-03-23 2003-02-24 マツダ株式会社 Engine valve timing control device
JPH07133709A (en) * 1993-09-17 1995-05-23 Mazda Motor Corp Engine valve timing variable equipment

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
No further relevant documents disclosed *

Also Published As

Publication number Publication date
CA2541726A1 (en) 2006-03-02
EP1783332A1 (en) 2007-05-09
ATE507371T1 (en) 2011-05-15
WO2006021997A1 (en) 2006-03-02
DE602004032479D1 (en) 2011-06-09
EP1783332B1 (en) 2011-04-27

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