Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Tomoharu Sakai

Katsuhiko Miyamoto

Yu Yokoyama

Takeshi Hasegawa

Hideki Miyamoto

Yoshiyuki Hoshiba

Yoshihiko Tanimura

Shigeki Nabetani

Kiyotaka Hosono

Takafumi Shigemori

Toshiaki Umemura

Hiroshi Yanagisawa

A structure of a chamber in a combustion engine includes a ring-groove portion formed on the piston, a squish-area making portion formed on a top surface of the piston for a squish-area, an outer edge portion formed around the top surface excepting the squish-area making portion, and a land portion formed around a side surface between the ring-groove portion and the top surface. The land portion includes, a squish-land portion formed between the ring-groove portion and the squish-area making portion, an outer-edge-land portion formed between the ring-groove portion and said outer edge portion, the outer-land portion being smaller than the squish-land portion in height.

Combustion engine chamber

There is provided a combustion chamber structure in an internal combustion engine in which, at a peripheral portion of a combustion chamber, a gap between a cylinder head lower face and a piston upper face is small in intake-to-intake and exhaust-to-exhaust zones and gradually increases toward an intake-to-exhaust zone. According to such design, the mixture in the peripheral portion of the combustion chamber can smoothly flow from the intake-to-intake and exhaust-to-exhaust zones to the intake-to-exhaust zone along the peripheral face of the cylinder. The flow of air-fuel mixture from the intake-to-intake zone collides at the center of the intake-to-exhaust zone with the flow of mixture from the exhaust-to-exhaust zone, and the combined flow goes over a conical tapered portion in the upper face of the piston and vigorously enters a central recessed portion thereof. Therefore, it is possible to satisfactorily mix an air-fuel mixture with a simplified configuration.

Combustion chamber structure in an internal combustion engine

Growing community of inventors

Okazaki, Japan

Tomoharu Sakai