Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Mitsubishi Jukogyo Kabushiki Kaisha

Kunihiko Nakajima

Hiroki Tamura

Koji Imoto

Tadao Omura

Motoyuki Maekawa

Mataji Tateishi

Yoshiaki Shioya

Yoichi Kataoka

Moritake Matusyama

An improved combustion chamber of a subchamber type of internal combustion engine defines a space extending contiguously to a subchamber injection port within a subchamber mouthpiece. A subchamber injection port control rod is disposed in the space adjacent the injection port. Remote from the subchamber injection port is an actuator within the space. A working substance such as wax, rubber, alcohol, etc. that expands and contracts to a large degree when subjected to temperature changes is sealingly enclosed within the actuator by an expansible member made of rubber or the like. One end of the subchamber injection port control rod is inserted into the expansible member. During a light loading operating state of the engine, a tip end portion of the subchamber injection port control rod is positioned to lie substantially along the same plane as the passageway wall surface defining the subchamber injection port, while during a heavy loading operating state the control rod is projected into the subchamber injection port and reduces the cross-sectional area of the passageway.

Combustion chamber of subchamber type internal combustion engine

A combustion chamber of a sub-chamber type internal combustion engine is improved so as to operate efficiently at an excellent fuel consumption with low smoke density, either upon partial loading or upon heavy loading. The combustion chamber includes a sub-chamber port communicating a main combustion chamber with a subsidiary combustion chamber formed within a cylinder head. A space portion is formed in a cylinder head member on the side of the sub-chamber port located farthest from a cylinder center line on a cross-sectional plane of the sub-chamber port defined as a plane including a center line of the subsidiary combustion chamber and the center line of a cylinder and opening into the sub-chamber port. An expansible/contractible tube is contained within the space portion. A sub-chamber port control rod is connected to the expansible/contractible tube and slidably extends into the opening of the space portion. A working substance sealingly filled into the expansible/contractible tube undergoes substantial expansion and contraction in response to temperature variations.

Combustion chamber of a sub-chamber type internal combustion engine

Growing community of inventors

Muko, Japan

Kunihiko Nakajima