Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Tohru Hashimoto

Akira Takahashi

Minoru Nishida

Hideaki Katashiba

Mitsuhiro Miyake

Masashi Chino

An exhaust gas cleaning device for controlling the air-to-fuel ratio of the air-fuel mixture supplied to an internal combustion engine (1) provided with a catalytic converter (14) disposed in the exhaust pipe (13). The air-to-fuel ratio is oscillated around the central level of the integral control or proportional plus integral feedback control signal based on the output of an air-to-fuel ratio sensor (12); the amplitude of oscillation and the proportional control amount are, or alternatively, the frequency of the oscillation is, varied in accordance with the operating condition of the engine.

Growing community of inventors

Tokyo, Japan

Tohru Hashimoto