JPS575533A - Piston for crank chamber precompression system two-cycle internal combustion engine - Google Patents

Piston for crank chamber precompression system two-cycle internal combustion engine

Info

Publication number
JPS575533A
JPS575533A JP8070580A JP8070580A JPS575533A JP S575533 A JPS575533 A JP S575533A JP 8070580 A JP8070580 A JP 8070580A JP 8070580 A JP8070580 A JP 8070580A JP S575533 A JPS575533 A JP S575533A
Authority
JP
Japan
Prior art keywords
piston
crank chamber
cylinder
holes
mixture
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
JP8070580A
Other languages
Japanese (ja)
Inventor
Tomio Iwai
Hiroyasu Nakada
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 Marine Co Ltd
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
Sanshin Kogyo KK
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, Sanshin Kogyo KK filed Critical Yamaha Motor Co Ltd
Priority to JP8070580A priority Critical patent/JPS575533A/en
Publication of JPS575533A publication Critical patent/JPS575533A/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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/24—Pistons  having means for guiding gases in cylinders, e.g. for guiding scavenging charge in two-stroke engines
    • 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

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

PURPOSE:To prevent a piston from breakge by utilizing the difference between pressure in a crank chamber and pressure in an exhaust port to forcilby send a small amount of mixture to the peripheral wall of a cylinder. CONSTITUTION:Near the lower portion of a piston ring 14b are provided through holes 14c, 14d having the inner peripheral side and commincating to a crank chamber (not shown) and the outer peripheral side end respectively opposed to peripheral walls 11a, 11b of a cylinder 11. On the other hand, a piston 14 is provided on the outer periphery with a circumferential groove 14e communicating to the through holes 14c, 14d. Thus, when the piston 14 reaches the lower dead point side, internal pressure in the crank chamber is raised and the groove 14e of the piston 14 reaches an exhaust port 13a, a small amount of compressed mixture in the crank chamber passes through the through holes 14c, 14d and groove 14e and flows in an exhaust path 13. In the meantime, the mixture is attached to both peripheral walls 11a, 11b of the cylinder 11 to improve lubrication between the piston 14 and both peripheral walls 11a, 11b.
JP8070580A 1980-06-13 1980-06-13 Piston for crank chamber precompression system two-cycle internal combustion engine Pending JPS575533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8070580A JPS575533A (en) 1980-06-13 1980-06-13 Piston for crank chamber precompression system two-cycle internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8070580A JPS575533A (en) 1980-06-13 1980-06-13 Piston for crank chamber precompression system two-cycle internal combustion engine

Publications (1)

Publication Number Publication Date
JPS575533A true JPS575533A (en) 1982-01-12

Family

ID=13725743

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8070580A Pending JPS575533A (en) 1980-06-13 1980-06-13 Piston for crank chamber precompression system two-cycle internal combustion engine

Country Status (1)

Country Link
JP (1) JPS575533A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62156U (en) * 1985-06-18 1987-01-06
JPS63195368A (en) * 1987-02-09 1988-08-12 Sanshin Ind Co Ltd Piston for two-cycle engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62156U (en) * 1985-06-18 1987-01-06
JPS63195368A (en) * 1987-02-09 1988-08-12 Sanshin Ind Co Ltd Piston for two-cycle engine
JPH0613861B2 (en) * 1987-02-09 1994-02-23 三信工業株式会社 Two-cycle engine piston

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