Toyota Jidosha Kogyo Kabushiki Kaisha

Aisan Kogyo Kabushiki Kaisha

Koichi Oosawa

Mitsunori Sasano

Touru Ichimiya

Mikio Goto

Mitsuya Yoshihara

An exhaust gas recirculating control system for internal combustion engines including an engine vacuum operated exhaust gas recirculating valve which allows recirculation of the engine exhaust when a high vacuum is applied, an engine vacuum operated vacuum control valve which allows air pressure to be applied to the exhaust gas recirculation valve when the engine vacuum exceeds a predetermined level, and a vacuum transmitting valve which delays in time the application of engine vacuum to the vacuum control valve. In this way, exhaust gas recirculation occurs during a fixed period after acceleration of the vehicle occurs.

Exhaust gas recirculating control system

Auxiliary apparatus for hot-starting an internal combustion engine includes a secondary air injection nozzle opened in the intake manifold, and a heat sensitive solenoid valve to control the supply of secondary air from an air source to the nozzle. When hot-starting the engine with the engine temperature exceeding a predetermined level, the valve opens to supply a jet of air into the intake manifold through the nozzle so that a too rich mixture gas likely to be produced in the manifold is made leaner, thus reducing the output of unburned, harmful ingredients of exhaust gas from the engine as well as improving the startability of a hot engine.

Growing community of inventors

Susono, Japan

Koichi Oosawa