JPS57203821A - Two-cycle engine equipped with scavenging pump - Google Patents

Two-cycle engine equipped with scavenging pump

Info

Publication number
JPS57203821A
JPS57203821A JP8869381A JP8869381A JPS57203821A JP S57203821 A JPS57203821 A JP S57203821A JP 8869381 A JP8869381 A JP 8869381A JP 8869381 A JP8869381 A JP 8869381A JP S57203821 A JPS57203821 A JP S57203821A
Authority
JP
Japan
Prior art keywords
piston
scavenging
scavenging pump
pump
crankshaft
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
JP8869381A
Other languages
Japanese (ja)
Inventor
Masahiro Yamamoto
Masayasu Mizoguchi
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 JP8869381A priority Critical patent/JPS57203821A/en
Publication of JPS57203821A publication Critical patent/JPS57203821A/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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/34—Engines with pumps other than of reciprocating-piston type with rotary pumps
    • F02B33/36—Engines with pumps other than of reciprocating-piston type with rotary pumps of positive-displacement type
    • 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

Abstract

PURPOSE:To prevent lubricant constituent from mixing with newly charged air, by separating a suction passage from a crankcase, by providing a scavenging pump to a suction passage, which is connected with the scavenging port of an engine, and by revolving the pump at the same speed as that of a crankshaft and to the reverse direction to the crankshaft. CONSTITUTION:A scavenging pump 21 is turned to a direction B by a crankshaft 7 which is turned to a direction A, by the intermediary of a driving gear 27 and a follower gear 26, while an engine is operated. Accordingly, the scavenging pump 21 sucks fresh air through a suction passage 17, and feeds it into a pre- compression chamber 16, after pressurizing it. When a scavenging port 15 is opened, accompanied with the descent of a piston 3, the pressurized air reserved in a pre-compression chamber 16 flows into a combustion chamber 4, pushing combustion gas out to an exhaust port 14, to scavenge the air from a combustion chamber 4. When a piston 3 reaches a top and a bottom dead points, the position of a gravity of a scavenging pump 21 and a counterweight 13 come to the opposite side to a piston 3, which offsets a reciprocating inertia force of a piston 3.
JP8869381A 1981-06-09 1981-06-09 Two-cycle engine equipped with scavenging pump Pending JPS57203821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8869381A JPS57203821A (en) 1981-06-09 1981-06-09 Two-cycle engine equipped with scavenging pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8869381A JPS57203821A (en) 1981-06-09 1981-06-09 Two-cycle engine equipped with scavenging pump

Publications (1)

Publication Number Publication Date
JPS57203821A true JPS57203821A (en) 1982-12-14

Family

ID=13949918

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8869381A Pending JPS57203821A (en) 1981-06-09 1981-06-09 Two-cycle engine equipped with scavenging pump

Country Status (1)

Country Link
JP (1) JPS57203821A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6158636U (en) * 1984-09-25 1986-04-19
GB2217783A (en) * 1988-04-30 1989-11-01 Fuji Heavy Ind Ltd Supercharged two-stroke fuel-injected engine
DE3924769A1 (en) * 1988-07-29 1990-02-01 Fuji Heavy Ind Ltd IDLE SPEED CONTROL SYSTEM FOR A TWO-STROKE COMBUSTION ENGINE
DE3924770A1 (en) * 1988-07-29 1990-02-01 Fuji Heavy Ind Ltd FUEL INJECTION CONTROL SYSTEM FOR A TWO-STROKE COMBUSTION ENGINE
DE3924771A1 (en) * 1988-07-29 1990-02-01 Fuji Heavy Ind Ltd FUEL INJECTION CONTROL SYSTEM FOR A TWO-STROKE COMBUSTION ENGINE
US5054444A (en) * 1988-08-11 1991-10-08 Fuji Jukogyo Kabushiki Kaisha Fuel injection control system for a two-cycle engine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6158636U (en) * 1984-09-25 1986-04-19
GB2217783A (en) * 1988-04-30 1989-11-01 Fuji Heavy Ind Ltd Supercharged two-stroke fuel-injected engine
DE3914166A1 (en) * 1988-04-30 1989-11-09 Fuji Heavy Ind Ltd RINSING SYSTEM FOR A TWO-STROKE INTERNAL COMBUSTION ENGINE
US4907549A (en) * 1988-04-30 1990-03-13 Fuji Jukogyo Kabushiki Kaisha Scavenging system for a two-stroke-cycle engine
GB2217783B (en) * 1988-04-30 1993-01-13 Fuji Heavy Ind Ltd A system for scavenging in a two-stroke engine
DE3924769A1 (en) * 1988-07-29 1990-02-01 Fuji Heavy Ind Ltd IDLE SPEED CONTROL SYSTEM FOR A TWO-STROKE COMBUSTION ENGINE
DE3924770A1 (en) * 1988-07-29 1990-02-01 Fuji Heavy Ind Ltd FUEL INJECTION CONTROL SYSTEM FOR A TWO-STROKE COMBUSTION ENGINE
DE3924771A1 (en) * 1988-07-29 1990-02-01 Fuji Heavy Ind Ltd FUEL INJECTION CONTROL SYSTEM FOR A TWO-STROKE COMBUSTION ENGINE
US5054444A (en) * 1988-08-11 1991-10-08 Fuji Jukogyo Kabushiki Kaisha Fuel injection control system for a two-cycle engine

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