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WO2002081877A1 - Decompressor for 4-stroke cycle internal combustion engine - Google Patents

Decompressor for 4-stroke cycle internal combustion engine Download PDF

Info

Publication number
WO2002081877A1
WO2002081877A1 PCT/JP2002/001617 JP0201617W WO02081877A1 WO 2002081877 A1 WO2002081877 A1 WO 2002081877A1 JP 0201617 W JP0201617 W JP 0201617W WO 02081877 A1 WO02081877 A1 WO 02081877A1
Authority
WO
WIPO (PCT)
Prior art keywords
cam
decompressor
suction
reduce
exhaust
Prior art date
Application number
PCT/JP2002/001617
Other languages
French (fr)
Japanese (ja)
Inventor
Toshiharu Akutsu
Yoshinobu Sawamura
Yuichi Wasada
Hideo Kobayashi
Bunichiro Sakamoto
Original Assignee
Honda Giken Kogyo Kabushiki Kaisha
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
Priority claimed from JP2001101426A external-priority patent/JP4023585B2/en
Priority claimed from JP2001101427A external-priority patent/JP3963658B2/en
Application filed by Honda Giken Kogyo Kabushiki Kaisha filed Critical Honda Giken Kogyo Kabushiki Kaisha
Priority to BRPI0204748-9A priority Critical patent/BR0204748B1/en
Publication of WO2002081877A1 publication Critical patent/WO2002081877A1/en

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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • 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
    • 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
    • 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
    • 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
    • F01L2305/02—Mounting of rollers

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

In a 4-stroke cycle internal combustion engine equipped with a suction valve (13) and an exhaust valve (14) which are driven for opening and closing by a suction cam (17) and an exhaust cam (18), respectively, which are integral with a cam shaft (19), a decompressor cam (35) is fitted on the cam shaft (19) through a one-way clutch (34) capable of transmitting torque only during reverse rotation and in such a manner as to be adjacent to at least one of the suction and exhaust cams (17, 18). Further, cam rollers (32) respectively rolling in contact with the suction and exhaust cams (17, 18) are respectively rotatably pivoted on the ends of rocker arms (26, 27) for opening the suction and exhaust valves ( 13, 14), and decompressor cam abutments (33) for the rocker arms (26, 27), which abut against the decompressor cam (35), are formed on the ends of the rocker arms (26, 27) which support cam rollers (32). Thereby, it is possible to reduce the dimension in the direction of the axis of rotation of the cam rollers (32) to reduce the width of the rocker arms (26, 27); thus, it becomes possible to reduce the power for driving the valve-moving device, and to reduce the size of the decompressor. A stop piece (41) slidably installed to pass through a through-hole (40a) in a stop piece support portion (40) disposed on a cylinder head (3) makes it possible to lock the locking projection (39a) on the peripheral edge of the decompressor cam (35).
PCT/JP2002/001617 2001-03-30 2002-02-22 Decompressor for 4-stroke cycle internal combustion engine WO2002081877A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BRPI0204748-9A BR0204748B1 (en) 2001-03-30 2002-02-22 4 stroke cycle internal combustion engine decompression device.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2001-101426 2001-03-30
JP2001-101427 2001-03-30
JP2001101426A JP4023585B2 (en) 2001-03-30 2001-03-30 Decompression device for 4-stroke cycle internal combustion engine
JP2001101427A JP3963658B2 (en) 2001-03-30 2001-03-30 Decompression device for 4-stroke cycle internal combustion engine

Publications (1)

Publication Number Publication Date
WO2002081877A1 true WO2002081877A1 (en) 2002-10-17

Family

ID=26612850

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/001617 WO2002081877A1 (en) 2001-03-30 2002-02-22 Decompressor for 4-stroke cycle internal combustion engine

Country Status (6)

Country Link
CN (1) CN1267624C (en)
AR (1) AR033078A1 (en)
BR (1) BR0204748B1 (en)
MY (1) MY141810A (en)
TR (1) TR200202591T1 (en)
WO (1) WO2002081877A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606254A (en) * 2012-04-05 2012-07-25 重庆路沃发动机有限公司 Decompressor for engine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2890350Y (en) * 2006-02-22 2007-04-18 广州市番禺华南摩托企业集团有限公司 Starting pressure-release and reversal pressure-release device
CN101131111B (en) * 2007-09-21 2010-06-02 隆鑫工业有限公司 Pressure reducing device of water-cooled engine
JP4777955B2 (en) * 2007-10-03 2011-09-21 本田技研工業株式会社 Engine decompression device
CN103912329B (en) * 2013-01-05 2017-10-10 光阳工业股份有限公司 Internal combustion engine convenient for replacing rocker shaft
CN105673215B (en) * 2016-03-02 2018-04-06 重庆亘富软件开发有限公司 The closing method of decompression is reverse-located for engine
CN110500157B (en) * 2019-09-12 2024-10-11 江门市大长江集团有限公司 Limiting structure and engine cylinder head pressure reducing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157770A (en) * 1984-03-26 1985-10-30 Honda Motor Co Ltd Decompression device for internal combustion engine
JPS63162911A (en) * 1986-12-25 1988-07-06 Honda Motor Co Ltd Autodecompression device for engine
JP2001140612A (en) * 1999-11-18 2001-05-22 Honda Motor Co Ltd Decompression device for four cycle engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157770A (en) * 1984-03-26 1985-10-30 Honda Motor Co Ltd Decompression device for internal combustion engine
JPS63162911A (en) * 1986-12-25 1988-07-06 Honda Motor Co Ltd Autodecompression device for engine
JP2001140612A (en) * 1999-11-18 2001-05-22 Honda Motor Co Ltd Decompression device for four cycle engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606254A (en) * 2012-04-05 2012-07-25 重庆路沃发动机有限公司 Decompressor for engine
CN102606254B (en) * 2012-04-05 2014-07-30 重庆路沃发动机有限公司 Decompressor for engine

Also Published As

Publication number Publication date
TR200202591T1 (en) 2003-12-22
MY141810A (en) 2010-06-30
CN1267624C (en) 2006-08-02
BR0204748B1 (en) 2010-06-29
CN1460147A (en) 2003-12-03
BR0204748A (en) 2003-06-10
AR033078A1 (en) 2003-12-03

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