JPS648315A - Exhaust throttle valve of two-cycle engine - Google Patents

Exhaust throttle valve of two-cycle engine

Info

Publication number
JPS648315A
JPS648315A JP29639886A JP29639886A JPS648315A JP S648315 A JPS648315 A JP S648315A JP 29639886 A JP29639886 A JP 29639886A JP 29639886 A JP29639886 A JP 29639886A JP S648315 A JPS648315 A JP S648315A
Authority
JP
Japan
Prior art keywords
tail pipe
valve body
manner
exhaust gas
end surface
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
JP29639886A
Other languages
Japanese (ja)
Other versions
JPH0733769B2 (en
Inventor
Ichiro Hayashimoto
Kazuhiko Ota
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 JP29639886A priority Critical patent/JPH0733769B2/en
Publication of JPS648315A publication Critical patent/JPS648315A/en
Publication of JPH0733769B2 publication Critical patent/JPH0733769B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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

  • Characterised By The Charging Evacuation (AREA)

Abstract

PURPOSE:To enable a valve body of the captioned engine to retreat with a minor driving force by forming, on a valve body end surface facing a tail pipe connected to an exhaust gas expansion chamber, a cut-out in an inclining manner that the sectional area of the tail pipe will reduce as well as by forming a guide opening fixed to the tail pipe in the manner that the valve body can be moved back and forth. CONSTITUTION:The exhaust gas of a two cycle engine is discharged through an expansion chamber 16 and a tail pipe 18. A throttle valve 20 is provided on the tail pipe 18 to increase and decrease the sectional area of the tail pipe 18. The throttle valve 20, being supported by a shaft 30 inside a mechanism chamber 28, is arranged to be driven through the medium of a belt 24 and a pulley 26. In this case, a guide opening 40 is formed on the tail pipe 18 in the manner that a valve body 36 can be moved back and forth. On the other hand, the valve body 36 end surface facing the tail pipe 18 is cut out with a circular arc of the same diameter as the tail pipe 18. The valve body 36 end surface that is cut out is inclined in a downward slope in the manner that the sectional area of the tail pipe 18 reduces from the upstream side of the exhaust gas toward the downstream side.
JP29639886A 1986-11-12 1986-12-12 Exhaust throttle valve for 2-cycle engine Expired - Fee Related JPH0733769B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29639886A JPH0733769B2 (en) 1986-11-12 1986-12-12 Exhaust throttle valve for 2-cycle engine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP61-269142 1986-11-12
JP26914286 1986-11-12
JP29639886A JPH0733769B2 (en) 1986-11-12 1986-12-12 Exhaust throttle valve for 2-cycle engine

Publications (2)

Publication Number Publication Date
JPS648315A true JPS648315A (en) 1989-01-12
JPH0733769B2 JPH0733769B2 (en) 1995-04-12

Family

ID=26548628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29639886A Expired - Fee Related JPH0733769B2 (en) 1986-11-12 1986-12-12 Exhaust throttle valve for 2-cycle engine

Country Status (1)

Country Link
JP (1) JPH0733769B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0330529U (en) * 1989-07-31 1991-03-26

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0330529U (en) * 1989-07-31 1991-03-26

Also Published As

Publication number Publication date
JPH0733769B2 (en) 1995-04-12

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees