EP2949890A3 - Engine and vehicle - Google Patents

Engine and vehicle Download PDF

Info

Publication number
EP2949890A3
EP2949890A3 EP15163611.5A EP15163611A EP2949890A3 EP 2949890 A3 EP2949890 A3 EP 2949890A3 EP 15163611 A EP15163611 A EP 15163611A EP 2949890 A3 EP2949890 A3 EP 2949890A3
Authority
EP
European Patent Office
Prior art keywords
weight
inner ring
cam shaft
decompression
contact portion
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
EP15163611.5A
Other languages
German (de)
French (fr)
Other versions
EP2949890A2 (en
EP2949890B1 (en
Inventor
Hideaki Hashimoto
Chihiro HARA
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
Original Assignee
Yamaha Motor Co Ltd
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 filed Critical Yamaha Motor Co Ltd
Publication of EP2949890A2 publication Critical patent/EP2949890A2/en
Publication of EP2949890A3 publication Critical patent/EP2949890A3/en
Application granted granted Critical
Publication of EP2949890B1 publication Critical patent/EP2949890B1/en
Active 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
    • F01L13/08—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio
    • F01L13/085—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio the valve-gear having an auxiliary cam protruding from the main cam profile
    • 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
    • F01L1/12—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
    • F01L2001/0476—Camshaft bearings
    • 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
    • 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
    • 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

A decompression mechanism is disposed between both ends of a cam shaft in the axial direction of the cam shaft. The decompression mechanism includes a weight and a decompression cam. The weight is supported in a rotatable manner on the cam shaft. The decompression cam switches between a state of coming into contact with a valve mechanism and a state of not coming into contact with the valve mechanism in response to the rotation of the weight. The weight includes an inner ring contact portion. The inner ring contact portion is disposed in line with an inner ring of a bearing in the axial direction of the cam shaft. The inner ring contact portion is located on the inside in the radial direction of the inner peripheral surface of an outer ring of the bearing.
EP15163611.5A 2014-05-27 2015-04-15 Engine and vehicle Active EP2949890B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014108988A JP2015224580A (en) 2014-05-27 2014-05-27 Engine and vehicle

Publications (3)

Publication Number Publication Date
EP2949890A2 EP2949890A2 (en) 2015-12-02
EP2949890A3 true EP2949890A3 (en) 2016-02-24
EP2949890B1 EP2949890B1 (en) 2017-01-25

Family

ID=52997237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15163611.5A Active EP2949890B1 (en) 2014-05-27 2015-04-15 Engine and vehicle

Country Status (5)

Country Link
EP (1) EP2949890B1 (en)
JP (1) JP2015224580A (en)
CN (1) CN105275530B (en)
ES (1) ES2616370T3 (en)
TW (1) TWI611095B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWM580123U (en) * 2018-11-30 2019-07-01 光陽工業股份有限公司 Decompression device of internal combustion engine
JP6887001B2 (en) * 2019-07-16 2021-06-16 本田技研工業株式会社 Engine with decompression device
TWI816429B (en) * 2022-06-09 2023-09-21 光陽工業股份有限公司 Pressure reducing device for internal combustion engines

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1380729A1 (en) * 2002-07-08 2004-01-14 Tecumseh Products Company Compression release mechanism for internal combustion engine
US20060225686A1 (en) * 2005-04-07 2006-10-12 Asano Yuuichi Decompressor and vehicle
US20080302321A1 (en) * 2007-06-08 2008-12-11 Kazuhisa Takemoto Decompressor for internal combustion engine
US20120199087A1 (en) * 2011-02-08 2012-08-09 Honda Motor Co., Ltd. Rocker arm structure

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2657394B2 (en) * 1988-05-20 1997-09-24 ヤンマーディーゼル株式会社 Engine decompression device
US6868835B2 (en) * 2003-01-17 2005-03-22 Honda Motor Co., Ltd. Internal combustion engine
JP4234653B2 (en) * 2004-09-03 2009-03-04 ヤマハ発動機株式会社 Engine decompression device
JP4549321B2 (en) * 2006-07-14 2010-09-22 本田技研工業株式会社 Decompression device for internal combustion engine
JP4540655B2 (en) 2006-11-24 2010-09-08 本田技研工業株式会社 Internal combustion engine with decompression device
JP5014181B2 (en) 2008-01-29 2012-08-29 本田技研工業株式会社 Engine decompression device
TW201109520A (en) * 2009-09-07 2011-03-16 Sanyang Industry Co Ltd Engine cylinder head with pressure relief device
CA2771821C (en) * 2009-09-14 2014-07-29 Honda Motor Co., Ltd. Valve operating system for internal combustion engine
TWI451031B (en) * 2010-05-12 2014-09-01 Sanyang Industry Co Ltd Engine decompression mechanism
TWM404273U (en) * 2010-10-19 2011-05-21 Sanyang Industry Co Ltd Engine of pressure relief device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1380729A1 (en) * 2002-07-08 2004-01-14 Tecumseh Products Company Compression release mechanism for internal combustion engine
US20060225686A1 (en) * 2005-04-07 2006-10-12 Asano Yuuichi Decompressor and vehicle
US20080302321A1 (en) * 2007-06-08 2008-12-11 Kazuhisa Takemoto Decompressor for internal combustion engine
US20120199087A1 (en) * 2011-02-08 2012-08-09 Honda Motor Co., Ltd. Rocker arm structure

Also Published As

Publication number Publication date
CN105275530A (en) 2016-01-27
EP2949890A2 (en) 2015-12-02
ES2616370T3 (en) 2017-06-12
TWI611095B (en) 2018-01-11
TW201546360A (en) 2015-12-16
EP2949890B1 (en) 2017-01-25
CN105275530B (en) 2017-12-08
JP2015224580A (en) 2015-12-14

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