JPS643233A - Crank chamber in two-cycle engine - Google Patents

Crank chamber in two-cycle engine

Info

Publication number
JPS643233A
JPS643233A JP15593087A JP15593087A JPS643233A JP S643233 A JPS643233 A JP S643233A JP 15593087 A JP15593087 A JP 15593087A JP 15593087 A JP15593087 A JP 15593087A JP S643233 A JPS643233 A JP S643233A
Authority
JP
Japan
Prior art keywords
crank
portions
fresh air
packing
annular
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
JP15593087A
Other languages
Japanese (ja)
Inventor
Norio Koga
Ikuo Koike
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.)
Honda Motor Co Ltd
Original Assignee
Honda 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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP15593087A priority Critical patent/JPS643233A/en
Publication of JPS643233A publication Critical patent/JPS643233A/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
    • 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

  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Supercharger (AREA)

Abstract

PURPOSE:To prevent fresh air from flowing in space portions formed by lightening recess portions of crank webs by a labyrinth packing function of annular small gaps formed between the outer periphery of the crank webs and the inner wall surface of a crank case. CONSTITUTION:When fresh air flows in a crank chamber C, annular small gaps 20, 20 formed between the inner peripheral surfaces 181, 181 of annular flange portions 18, 18 of crank webs 8, 8 and the peripheral walls 191, 191 of an annular recess portion 19 of a crank case 3 function as a labyrinth packing to effectively prevent fresh air from entering space portions c1, c1 formed by lightening recess portions 11, 11, so that the capacity of the space portions c1, c1 is substantially excluded from the capacity of the crank case C at the time of deciding the primary compression ratio. Thus, the conventional after- process for packing a balancing recess portion or a hole with packing material or driving a top plate is not required, to remarkably reduce the manufacturing cost.
JP15593087A 1987-06-23 1987-06-23 Crank chamber in two-cycle engine Pending JPS643233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15593087A JPS643233A (en) 1987-06-23 1987-06-23 Crank chamber in two-cycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15593087A JPS643233A (en) 1987-06-23 1987-06-23 Crank chamber in two-cycle engine

Publications (1)

Publication Number Publication Date
JPS643233A true JPS643233A (en) 1989-01-09

Family

ID=15616619

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15593087A Pending JPS643233A (en) 1987-06-23 1987-06-23 Crank chamber in two-cycle engine

Country Status (1)

Country Link
JP (1) JPS643233A (en)

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