JPS5781109A - Device for prevention of exhaust valve sticking - Google Patents

Device for prevention of exhaust valve sticking

Info

Publication number
JPS5781109A
JPS5781109A JP55158452A JP15845280A JPS5781109A JP S5781109 A JPS5781109 A JP S5781109A JP 55158452 A JP55158452 A JP 55158452A JP 15845280 A JP15845280 A JP 15845280A JP S5781109 A JPS5781109 A JP S5781109A
Authority
JP
Japan
Prior art keywords
exhaust valve
exhaust
end opening
valve
atmosphere
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.)
Pending
Application number
JP55158452A
Other languages
Japanese (ja)
Inventor
Shigenori Omote
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
Priority to JP55158452A priority Critical patent/JPS5781109A/en
Publication of JPS5781109A publication Critical patent/JPS5781109A/en
Pending legal-status Critical Current

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
    • F02D13/028—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation for two-stroke engines
    • F02D13/0284—Variable control of exhaust valves only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PURPOSE:To prevent the accumulation of carbon on the exhaust valve surface by providing an air introduction passage with its one end opening to the surface of the exhaust valve and the other end opening to atmosphere and providing thereto a check valve which permits the flow of air only in one direction. CONSTITUTION:In a 2-cycle engine having an exhaust valve 24 with adjustable timing for the exhaust from an exhaust port 23, an air introduction passage 28 with its one end opening to the surface of the exhaust valve 24 and the other end opening to atmosphere is provided, and a check valve 29 permitting the flow of air into the exhaust valve but preventing the flow of the exhaust from the exhaust valve is provided on said passage 28. When a piston 3 lowers during the running of the engine atmosphere is introduced into the exhaust valve 24 due to the negative pressure created near the exhaust port 23 immediately after the exhaust port 23 opens thereby blowing off the lubricant composition which adheres to the exhaust valve and causes the accmulation of carbon.
JP55158452A 1980-11-11 1980-11-11 Device for prevention of exhaust valve sticking Pending JPS5781109A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55158452A JPS5781109A (en) 1980-11-11 1980-11-11 Device for prevention of exhaust valve sticking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55158452A JPS5781109A (en) 1980-11-11 1980-11-11 Device for prevention of exhaust valve sticking

Publications (1)

Publication Number Publication Date
JPS5781109A true JPS5781109A (en) 1982-05-21

Family

ID=15672056

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55158452A Pending JPS5781109A (en) 1980-11-11 1980-11-11 Device for prevention of exhaust valve sticking

Country Status (1)

Country Link
JP (1) JPS5781109A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5267535A (en) * 1990-08-22 1993-12-07 Industrial Technology Research Institute Rotary exhaust valve for two-stroke engine
WO2010114393A1 (en) * 2009-03-30 2010-10-07 Pivotal Engineering Limited Pre-combustion cycle pressurisation system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5267535A (en) * 1990-08-22 1993-12-07 Industrial Technology Research Institute Rotary exhaust valve for two-stroke engine
WO2010114393A1 (en) * 2009-03-30 2010-10-07 Pivotal Engineering Limited Pre-combustion cycle pressurisation system
US8720391B2 (en) 2009-03-30 2014-05-13 Mace Engineering Limited Pre-combustion cycle pressurisation system

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