Mazda Motor Corporation

Toyo Kogyo Co., Ltd.

Shigeki Hamada

Shigeru Sakurai

Hideki Tanaka

Sadashichi Yoshioka

Haruki Higashi

Takashige Tokushima

Tsutomu Matsuoka

Humio Hinatase

An engine intake system including a supercharger of a type wherein the intake air drawn from the intake air inlet port is compressed by the pressure of the exhaust gas before it is discharged through the intake air outlet port. An exhaust gas recirculation passage is provided between the exhaust passage upstream of the supercharger and the intake passage downstream of the supercharger. The recirculation passage can be used for decreasing the pressure difference between the exhaust gas and the intake air to thereby minimize the engine pumping loss. Further, the recirculation passage can be used for recirculating the exhaust gas to the intake passage to thereby decrease nitrogen oxides in the exhaust gas.

Engine intake system having a pressure wave supercharger

An engine has an output shaft which is connected with a generator and a motor. A control device is provided to operate the generator in a high output torque period and to operate the motor in a low output torque period in an operating cycle of the engine. Thus, the generator applies a negative torque to the output shaft whereas the motor applies a positive torque to the output shaft to thereby moderate the output torque fluctuations.

Means for suppressing engine output torque fluctuations

A diesel engine including an auxiliary or swirl chamber provided in the cylinder head and in communication with a main combustion chamber. The auxiliary chamber is defined in a shell structure which is located in the cylinder head and provided with a heat insulating structure. The engine includes an exhaust gas recirculating system in which the exhaust gas recirculation ratio, expressed as a percentage, is controlled in a range between (60-100.times.1/.lambda.) and (140-210.times.1/.lambda.), where .lambda. is the excess air ratio.

Diesel cycle engines having heat insulated auxiliary combustion chambers

An exhaust gas purifying device for use with a diesel engine comprising a filter block disposed in an engine exhaust passage for collecting exhaust gas particulates, and a heater for incinerating the collected exhaust gas particulates. The filter block has parallel channels defined therein and separated from one another by porous partition walls, some of the channels being closed at their inlet ends with blind plugs while the other channels are closed at their outlet ends with blind plugs. The heater is supported by the blind plugs.

Exhaust gas purifying device

An exhaust gas recirculation (EGR) system for a diesel engine comprising an EGR control valve for regulating the flow of exhaust gases to be recirculated from an engine exhaust system back to an engine air intake system. When the exhaust gas recirculation is to be interrupted, the EGR control valve is closed a predetermined time after the opening of a throttle valve used in the air intake system for regulating the flow of air towards the engine. For this purpose, delay valves are utilized in association with the throttle valve and the EGR control valve.

Growing community of inventors

Hiroshima, Japan

Shigeki Hamada