JPS6480737A - Compression ratio adjustable device of internal combustion engine - Google Patents

Compression ratio adjustable device of internal combustion engine

Info

Publication number
JPS6480737A
JPS6480737A JP23815487A JP23815487A JPS6480737A JP S6480737 A JPS6480737 A JP S6480737A JP 23815487 A JP23815487 A JP 23815487A JP 23815487 A JP23815487 A JP 23815487A JP S6480737 A JPS6480737 A JP S6480737A
Authority
JP
Japan
Prior art keywords
piston
recessed
sections
outer piston
axial direction
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
JP23815487A
Other languages
Japanese (ja)
Inventor
Hiromichi Bito
Takayuki Arai
Yasuo Takashima
Seinosuke Hara
Tatsuyuki Matsuya
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.)
Nissan Motor Co Ltd
Hitachi Astemo Ltd
Original Assignee
Atsugi Motor Parts Co Ltd
Nissan 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 Atsugi Motor Parts Co Ltd, Nissan Motor Co Ltd filed Critical Atsugi Motor Parts Co Ltd
Priority to JP23815487A priority Critical patent/JPS6480737A/en
Publication of JPS6480737A publication Critical patent/JPS6480737A/en
Pending legal-status Critical Current

Links

Landscapes

  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

PURPOSE:To make it possible to surely prevent free turning to the inner piston of an outer piston by performing projection and recessed engagement of the outer piston and inner piston along the vertical and axial direction. CONSTITUTION:Recessed sections 33 and 33 are formed along the vertical and axial direction on the inner circumference of an outer piston 21. On the other hand, projected sections 35 and 35 to be engaged with the recessed sections 33 and 33 are formed along the vertical and axial direction on the outer circumference of an inner piston 29. This surely prevents the free turning of the outer piston 21 because of the projection-recessed engagement of the recessed sections 33 and engaging projected sections, even if the turning force is acted on the outer piston 21 in a circumferential direction in operating an engine and in switching high and low compression ratio states. Moreover, such contact at faces with each other due to projection-recessed engagement allows facial pressure to be dispersed to the whole of the faces and partial facial pressure to be lessened, which prevents partial abrasion, thereby improving endurance.
JP23815487A 1987-09-22 1987-09-22 Compression ratio adjustable device of internal combustion engine Pending JPS6480737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23815487A JPS6480737A (en) 1987-09-22 1987-09-22 Compression ratio adjustable device of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23815487A JPS6480737A (en) 1987-09-22 1987-09-22 Compression ratio adjustable device of internal combustion engine

Publications (1)

Publication Number Publication Date
JPS6480737A true JPS6480737A (en) 1989-03-27

Family

ID=17025998

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23815487A Pending JPS6480737A (en) 1987-09-22 1987-09-22 Compression ratio adjustable device of internal combustion engine

Country Status (1)

Country Link
JP (1) JPS6480737A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0311143A (en) * 1989-06-08 1991-01-18 Nissan Motor Co Ltd Variable compression ratio piston

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0311143A (en) * 1989-06-08 1991-01-18 Nissan Motor Co Ltd Variable compression ratio piston

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