VARIABLE COMPRESSION RATIO INTERNAL COMBUSTION ENGINE

Japanese Patent JP2016217296

A

PROBLEM TO BE SOLVED: To improve responsiveness at the switching of a mechanical compression ratio, in a variable compression ratio internal combustion engine having a variable-length connecting rod.SOLUTION: A variable compression ratio internal combustion engine 1 comprises a cylinder 15, a piston 5, and a connecting rod 6. The connecting rod comprises a connecting rod main body 31 having a large-diameter end part 31a and a small-diameter end part 31b, and an eccentric member 32. The eccentric member is constituted so that an axial line of a piston pin receiving opening 32d is decentered from a turning axial line of the eccentric member, ascends the piston with respect to the connecting rod main body by being turned to one direction, and descends the piston with respect to the connecting rod main body by being turned to the other direction. The variable compression ratio internal combustion engine further comprises turn control means which controls a turn of the eccentric member, the turn control means sets an engine rotation number to a reference rotation number or larger when the eccentric member is turned, and the reference rotation number is larger than an idling rotation number when the eccentric member is not turned.SELECTED DRAWING: Figure 12

KAMO YOSHIRO
EZAKI SHUICHI

JP2015104882A

December 22, 2016

May 22, 2015

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TOYOTA MOTOR CORP

F02D15/02; F16C7/06

JP2015014286A	2015-01-22
JPS6415438A	1989-01-19
JP2009299570A	2009-12-24
JPS60230523A	1985-11-16
JPS62237043A	1987-10-17
JP2013253480A	2013-12-19

Atsushi Aoki
Jun Tsuruta
Yuichi Morimoto
Shinji Mitsuhashi
Koichi Ito
Tatsuki Sone

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