Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Nippon Jidosha Engineering Kabushiki Kaisha

Nobuaki Shimizu

Yoshiaki Danno

Yoshinari Fukami

Katsuo Akishino

Osamu Hirako

Takashi Dogahara

Hidetsugu Kanao

Taizo Kitada

Daisuke Sanbayashi

Takehiko Katsumoto

Masahiko Matsuda

Hiroshi Kamada

Taizou Kitada

Takaaki Hirano

Masaji Asada

Mituru Kishimoto

Atsuo Sato

Masazi Asada

An engine cooling apparatus separately cools a cylinder head and a cylinder block which are positioned around upper and lower portions of an engine combustion chamber. For increased engine output power, the engine cooling system cools the cylinder head to a relatively low temperature and the cylinder block to a relatively high temperature. The cylinder block includes cylinder liners disposed in an oil jacket which is supplied with oil from an oil circulating system via a pressure reducing valve. Oil in the oil jacket returns through a return path into an oil reservoir in the engine, and air bubbles in the oil jacket are returned to the oil reservoir via an air bubble return passage which develops a pressure difference between its opposite open ends.

Engine cooling apparatus

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

Kameoka, Japan

Nobuaki Shimizu