Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Masahiko Matsuda

Yoshiaki Danno

Katsuo Akishino

Osamu Hirako

Tateo Kume

Hidetsugu Kanao

Takashi Dogahara

Daisuke Sanbayashi

Takehiko Katsumoto

Kazuhiro Shiraishi

Hiroshi Kamada

Taizou Kitada

Nobuaki Shimizu

Yoshinari Fukami

Masaji Asada

Toru Okada

Takaaki Hirano

A variable compression ratio apparatus is provided for use in an internal combustion engine. The apparatus has an eccentric sleeve rotatably arranged in one of pivot portions at opposite ends of a connecting rod so as to make a bearing hole of the connecting rod and a pin, which extends through the bearing hole, eccentric relative to each other. The apparatus also has an eccentric sleeve lock device capable of fixing rotation of the eccentric sleeve at a desired position. The lock device includes a pin member engageable with one of engagement portions formed in the eccentric sleeve and a piston-type fluid pressure drive system. The drive system is adapted to produce a pressure difference between fluid pressure chambers formed at opposite sides of a piston portion, which is connected to the pin member, in a state that the fluid pressure chambers are applied with a prescribed fluid pressure, whereby the piston portion is moved to drive the pin member.

Variable compression ratio apparatus for internal combustion engine

An engine cooling device comprises an oil jacket surrounding a cylinder portion of an engine, an oil gallery supplying high-pressure oil to various parts of the engine, and an oil pressure regulator disposed between the oil jacket and the oil gallery to reduce the pressure of the high-pressure oil supplied from the oil gallery and to supply the oil at a reduced pressure to the oil jacket. Thus, the required mechanical strength of the oil jacket can be decreased to decrease the weight of the engine cylinder block.

Engine cooling device

Growing community of inventors

Kyoto, Japan

Masahiko Matsuda