Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Eiji Mizote

Tomomi Nakagawa

Toshio Tsuda

Taizo Shimada

Tomoaki Tajima

Shuichi Komuro

Shigeo Yazawa

Osamu Miyata

Tetsuo Suzuki

Susumu Kohketsu

Yoshihisa Yamaki

Toru Kawatani

A projection positioned in the center of a concave section of a toroidal combustion chamber is divided into a section with a steep slope extending from the bottom to the head surface and a section with a gentle slope. The head surface is in the form of a flattened conical trapezoid. Because of its shape, the projection makes it possible for the air which is close to the center section to flow close to the surface of a side wall of the concave section. The air which had been at the center section is added to the amount of air supplied for combustion and is mixed with the fuel in the vicinity of the surface of the side wall of the concave section. By setting the angle at which the air flows along the side wall surface (re-entrant angle) in the combustion chamber, the flow of the air close to the side wall surface is made turbulent, which improves the agitation of the fuel.

Combustion chamber for a diesel engine

Variable swirl intake apparatus (24) controls a swirl of intake air in cylinder chamber (22) of an engine. Variable swirl intake apparatus (24) has intake port (25) which has entrance portion (25a) formed on cylinder head (23) of the engine and extending from the side surface of cylinder head (23) and swirl chamber (25b) which communicates with entrance portion (25a) and is formed to provide a swirl to a gas flow flowing from entrance portion (25a), intake valve (26), arranged on the lower surface of cylinder head (23), for opening/closing between swirl chamber (25b) and cylinder chamber (22) of the engine, swirl control path (28), one end of which is open to swirl chamber (25a) on the side of entrance portion (25a) with respect to a line connecting the axis along a piston sliding direction at the center of cylinder chamber (22) and the axis of the intake valve, and the other end of which is open to the side surface of cylinder head (23), and a control apparatus (29) for controlling a gas flow into swirl control path (28). According to variable swirl intake apparatus (24), a swirl of a gas taken in the engine can be controlled in accordance with an operating condition of the engine so as to reduce NO.sub.x and a fuel consumption rate.

Variable swirl intake apparatus for engine

Growing community of inventors

Yokohama, Japan

Eiji Mizote