VARIABLE COMPRESSION RATIO INTERNAL COMBUSTION ENGINE

Title:

VARIABLE COMPRESSION RATIO INTERNAL COMBUSTION ENGINE

Document Type and Number:

Japanese Patent JP2017203429

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To provide a variable compression ratio internal combustion engine which can change an effective length of a connecting rod while suppressing the enlargement of an engine main body.SOLUTION: A variable compression ratio internal combustion engine comprises a crankshaft and a connecting rod 6. The connecting rod comprises: a connecting rod main body 31; a first hydraulic cylinder 33a; a first hydraulic piston 33b; a second hydraulic cylinder 34a; a second hydraulic piston 34b; an interlocking member; a working fluid passage 50; and a spool 80 which moves between a first operation position for permitting the supply of a working fluid to the first hydraulic cylinder from the second hydraulic cylinder, and a second operation position for permitting the supply of the working fluid to the second hydraulic cylinder from the first hydraulic cylinder. The variable compression ratio internal combustion engine further comprises an energization member which is arranged in a crank pin of the crankshaft, and energizes the spool so that a position of the spool is switched between the first operation position and the second operation position.SELECTED DRAWING: Figure 3

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Inventors:

KAMO YOSHIRO

Application Number:

JP2016096195A

Publication Date:

November 16, 2017

Filing Date:

May 12, 2016

Export Citation:

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Assignee:

TOYOTA MOTOR CORP

International Classes:

F02D15/02; F02B75/04; F02B75/32

Domestic Patent References:

JP2016502030A	2016-01-21
JP2015014286A	2015-01-22
JP2000064866A	2000-02-29
JP2015527518A	2015-09-17
JPH02267335A	1990-11-01
JPS5940538U	1984-03-15
JP2011196549A	2011-10-06

Foreign References:

WO2015082722A2	2015-06-11
US20150260109A1	2015-09-17

Attorney, Agent or Firm:

Atsushi Aoki
Jun Tsuruta
Tone Yuuki
Yuichi Morimoto
Shinji Mitsuhashi
Koichi Ito

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