JPS5768508A - Two cycle engine - Google Patents

Two cycle engine

Info

Publication number
JPS5768508A
JPS5768508A JP14329080A JP14329080A JPS5768508A JP S5768508 A JPS5768508 A JP S5768508A JP 14329080 A JP14329080 A JP 14329080A JP 14329080 A JP14329080 A JP 14329080A JP S5768508 A JPS5768508 A JP S5768508A
Authority
JP
Japan
Prior art keywords
exhaust
valve
extension
outer periphery
rotating
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
JP14329080A
Other languages
Japanese (ja)
Other versions
JPS6345489B2 (en
Inventor
Masahiro Yamamoto
Ikuo Katayama
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 JP14329080A priority Critical patent/JPS5768508A/en
Publication of JPS5768508A publication Critical patent/JPS5768508A/en
Publication of JPS6345489B2 publication Critical patent/JPS6345489B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PURPOSE: To reduce carbon accumulated on the outer periphery of an exhaust valve in an engine for varying an exhaust gas timing by the telescopic movements of the valve in an exhaust port by rotatably providing the exhaust valve in a recess formed on the inner surface of an exhaust gas passage by forming a specific recess on the outer periphery of the exhaust valve.
CONSTITUTION: An exhaust valve 13 is rotatably displaced in response to the rotating speed of an engine, and is so rotated, for example, at a low speed rotating as to advance an extension 26 into an exhaust passage 9 as illustrated by broken lines and to close the upper hole of an exhaust port 10. In this state the exhaust port 10 is closed earlier upon rising of a piston 2, but is opened later upon falling of the piston 2, and the exhaust timing tends to be delayed. In such a structure, a plurality of escape grooves 28 are formed at an equal interval in the peripheral direction along the axis direction of the exhaust vlave 13 on the outer periphery of the extension 26 of the valve 13. These grooves 28 are formed over the rotating renge of the extension 26.
COPYRIGHT: (C)1982,JPO&Japio
JP14329080A 1980-10-14 1980-10-14 Two cycle engine Granted JPS5768508A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14329080A JPS5768508A (en) 1980-10-14 1980-10-14 Two cycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14329080A JPS5768508A (en) 1980-10-14 1980-10-14 Two cycle engine

Publications (2)

Publication Number Publication Date
JPS5768508A true JPS5768508A (en) 1982-04-26
JPS6345489B2 JPS6345489B2 (en) 1988-09-09

Family

ID=15335282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14329080A Granted JPS5768508A (en) 1980-10-14 1980-10-14 Two cycle engine

Country Status (1)

Country Link
JP (1) JPS5768508A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6220124U (en) * 1985-07-22 1987-02-06
US4807571A (en) * 1985-07-22 1989-02-28 Honda Giken Kogyo Kabushiki Kaisha Exhaust timing control apparatus
US5379731A (en) * 1991-07-02 1995-01-10 Orbital Engine Company (Australia) Pty. Limited Multicyclinder two stroke cycle engine
US5410993A (en) * 1992-12-25 1995-05-02 Yamaha Hatsudoki Kabushiki Kaisha Exhaust control valve for engine
US5537958A (en) * 1994-02-07 1996-07-23 Sanshin Kogyo Kabushiki Kaisha Variable compression ratio system for two-cycle engine
US5660152A (en) * 1995-04-17 1997-08-26 Yamaha Hatsudoki Kabushiki Kaisha Exhaust control valve for engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258305U (en) * 1975-10-25 1977-04-27
JPS5525682U (en) * 1978-08-09 1980-02-19

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525682B2 (en) * 1974-04-09 1980-07-08

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258305U (en) * 1975-10-25 1977-04-27
JPS5525682U (en) * 1978-08-09 1980-02-19

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6220124U (en) * 1985-07-22 1987-02-06
US4807571A (en) * 1985-07-22 1989-02-28 Honda Giken Kogyo Kabushiki Kaisha Exhaust timing control apparatus
JPH0240264Y2 (en) * 1985-07-22 1990-10-26
US5379731A (en) * 1991-07-02 1995-01-10 Orbital Engine Company (Australia) Pty. Limited Multicyclinder two stroke cycle engine
US5410993A (en) * 1992-12-25 1995-05-02 Yamaha Hatsudoki Kabushiki Kaisha Exhaust control valve for engine
US5605119A (en) * 1992-12-25 1997-02-25 Yamaha Hatsudoki Kabushiki Kaisha Exhaust control valve for engine
US5537958A (en) * 1994-02-07 1996-07-23 Sanshin Kogyo Kabushiki Kaisha Variable compression ratio system for two-cycle engine
US5660152A (en) * 1995-04-17 1997-08-26 Yamaha Hatsudoki Kabushiki Kaisha Exhaust control valve for engine

Also Published As

Publication number Publication date
JPS6345489B2 (en) 1988-09-09

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