JPH0311143A - Variable compression ratio piston - Google Patents

Variable compression ratio piston

Info

Publication number
JPH0311143A
JPH0311143A JP14407189A JP14407189A JPH0311143A JP H0311143 A JPH0311143 A JP H0311143A JP 14407189 A JP14407189 A JP 14407189A JP 14407189 A JP14407189 A JP 14407189A JP H0311143 A JPH0311143 A JP H0311143A
Authority
JP
Japan
Prior art keywords
oil
piston
oil chamber
compression ratio
pressurized
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
JP14407189A
Other languages
Japanese (ja)
Other versions
JP2763593B2 (en
Inventor
Takayuki Arai
Kyugo Hamai
Tatsuyuki Matsuya
Yasuo Takashima
Original Assignee
Nissan Motor Co Ltd
Atsugi Unisia Corp
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 Nissan Motor Co Ltd, Atsugi Unisia Corp filed Critical Nissan Motor Co Ltd
Priority to JP1144071A priority Critical patent/JP2763593B2/en
Publication of JPH0311143A publication Critical patent/JPH0311143A/en
Application granted granted Critical
Publication of JP2763593B2 publication Critical patent/JP2763593B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To improve responsiveness by forming an upper part oil chamber into annular form and fitting an inner piston with an outer piston so that the relative revolution in the peripheral direction is regulated on an annular inner peripheral surface.
CONSTITUTION: When an internal combustion engine starts, lubricating oil is sent as pressurized oil into the hollow part 15a of a piston pin 15 from an oil passage 3, and the pressurized oil is introduced into an upper part oil chamber 45 through an outlet 15c and the oil feeding valve 51 of an inner piston 13, and the pressurized oil stays in the oil chamber 45 having the larger area than that of a lower part oil chamber 47, and a high compression ratio is obtained. When the engine is put into high load operation, and the internal pressure of the oil chamber 45 increases over a prescribed value by the increase of the gas pressure applied onto the upper surface of an outer piston 35, the pressurized oil pushing-opens an oil discharge valve 55, and the outside discharge of working oil is started, and the pressurized oil in the oil chamber 45 is introduced into an oil chamber 47 from a communication passage 596 through an orifice 62, forming the oil chamber 47, accompanied with the lowering of the piston 35. In this case, the oil chamber 45 is formed into an annular form, and the capacity is reduced, and the revolution in the peripheral direction of the piston 35 is regulated, and speedy switching from high compression ratio to low compression ratio is performed.
COPYRIGHT: (C)1991,JPO&Japio
JP1144071A 1989-06-08 1989-06-08 Variable compression ratio piston Expired - Lifetime JP2763593B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1144071A JP2763593B2 (en) 1989-06-08 1989-06-08 Variable compression ratio piston

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1144071A JP2763593B2 (en) 1989-06-08 1989-06-08 Variable compression ratio piston

Publications (2)

Publication Number Publication Date
JPH0311143A true JPH0311143A (en) 1991-01-18
JP2763593B2 JP2763593B2 (en) 1998-06-11

Family

ID=15353611

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1144071A Expired - Lifetime JP2763593B2 (en) 1989-06-08 1989-06-08 Variable compression ratio piston

Country Status (1)

Country Link
JP (1) JP2763593B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000052088A (en) * 1999-01-29 2000-08-16 밍 루 Suspension device for vehicle
JP2012137066A (en) * 2010-12-27 2012-07-19 Mitsubishi Motors Corp Piston
JP2012137061A (en) * 2010-12-27 2012-07-19 Mitsubishi Motors Corp Piston
JP2012137060A (en) * 2010-12-27 2012-07-19 Mitsubishi Motors Corp Piston
JP2015017560A (en) * 2013-07-11 2015-01-29 三菱自動車工業株式会社 Piston

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3835142B2 (en) 1999-09-07 2006-10-18 日産自動車株式会社 Control device for self-ignition / spark ignition internal combustion engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6480737A (en) * 1987-09-22 1989-03-27 Nissan Motor Compression ratio adjustable device of internal combustion engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6480737A (en) * 1987-09-22 1989-03-27 Nissan Motor Compression ratio adjustable device of internal combustion engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000052088A (en) * 1999-01-29 2000-08-16 밍 루 Suspension device for vehicle
JP2012137066A (en) * 2010-12-27 2012-07-19 Mitsubishi Motors Corp Piston
JP2012137061A (en) * 2010-12-27 2012-07-19 Mitsubishi Motors Corp Piston
JP2012137060A (en) * 2010-12-27 2012-07-19 Mitsubishi Motors Corp Piston
JP2015017560A (en) * 2013-07-11 2015-01-29 三菱自動車工業株式会社 Piston

Also Published As

Publication number Publication date
JP2763593B2 (en) 1998-06-11

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