JPS57146037A - Piston of internal combustion engine - Google Patents

Piston of internal combustion engine

Info

Publication number
JPS57146037A
JPS57146037A JP3217681A JP3217681A JPS57146037A JP S57146037 A JPS57146037 A JP S57146037A JP 3217681 A JP3217681 A JP 3217681A JP 3217681 A JP3217681 A JP 3217681A JP S57146037 A JPS57146037 A JP S57146037A
Authority
JP
Japan
Prior art keywords
piston
thickness
exhaust side
scanvenging
temperature
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
JP3217681A
Other languages
Japanese (ja)
Other versions
JPS6347901B2 (en
Inventor
Akinori Kojima
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 JP3217681A priority Critical patent/JPS57146037A/en
Publication of JPS57146037A publication Critical patent/JPS57146037A/en
Publication of JPS6347901B2 publication Critical patent/JPS6347901B2/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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/02—Pistons  having means for accommodating or controlling heat expansion
    • 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
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
    • F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • F01P3/202—Cooling circuits not specific to a single part of engine or machine for outboard marine 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)
  • Ocean & Marine Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

PURPOSE:To suppress the increase in the temperature of the exhaust side to lower the temperature of the full part of the piston head and to prevent the seizure of the piston by forming the piston head into a deviated thickness structure in which the exhaust side is relatively thinner than the other parts. CONSTITUTION:A two-cycle internal combustion engine A for an outboard motor is accommodated in a cowling B, for example, and the head part C1 of the piston C is heated in accordance with the combustion in a combustion chamber 7. With respect to the temperature in the piston head C1, the temperature at the exhaust side S1 facing an exhaust hole 1 is higher than that at the scanvenging side S2 facing a scanvenging hole 2. Therefore, the thickness of the piston head C1 is made into a deviated thickness and the thickness of the exhaust side S1 is made relatively thinner than the thickness of the scanvenging side S2. Accordingly, the propagation of heat from the exhaust side S1 where it is apt to become high temperatures to the scanvenging side S2 where it is apt to be cooled, is promoted, and the exhaust side S1 is indirectly cooled.
JP3217681A 1981-03-05 1981-03-05 Piston of internal combustion engine Granted JPS57146037A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3217681A JPS57146037A (en) 1981-03-05 1981-03-05 Piston of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3217681A JPS57146037A (en) 1981-03-05 1981-03-05 Piston of internal combustion engine

Publications (2)

Publication Number Publication Date
JPS57146037A true JPS57146037A (en) 1982-09-09
JPS6347901B2 JPS6347901B2 (en) 1988-09-26

Family

ID=12351621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3217681A Granted JPS57146037A (en) 1981-03-05 1981-03-05 Piston of internal combustion engine

Country Status (1)

Country Link
JP (1) JPS57146037A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6010852U (en) * 1983-07-04 1985-01-25 スズキ株式会社 Piston for 2-stroke engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5388403A (en) * 1977-01-17 1978-08-03 Toyota Motor Corp Combustion chamber for internal cobbustion engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5388403A (en) * 1977-01-17 1978-08-03 Toyota Motor Corp Combustion chamber for internal cobbustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6010852U (en) * 1983-07-04 1985-01-25 スズキ株式会社 Piston for 2-stroke engine
JPH0118822Y2 (en) * 1983-07-04 1989-06-01

Also Published As

Publication number Publication date
JPS6347901B2 (en) 1988-09-26

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