Toyota Jidosha Kabushiki Kaisha

Kouichi Oosawa

Kazuhiro Ichimoto

Yoshiaki Kinoshita

In a device for restraining the deterioration of a catalytic apparatus of an internal combustion engine of the present invention, when the temperature of the catalytic apparatus arranged in the engine exhaust system is higher than a predetermined temperature in a vehicle deceleration, a fuel-cut of the engine is prohibited and a first motor-generator MGconnected with the vehicle drive shaftis operated as a generator to charge an electrical accumulator

Device for restraining the deterioration of a catalytic apparatus of an internal combustion engine

A supercharged engine knock control system of the class in which spark advance is retarded by a retard correction value varying in response to an occurrence of knocking is improved in such a manner that the retard correction value computed under engine conditions which do not accurately reflect the octane rating of the fuel is not taken into account in determining the boost pressure control. To this end, the knock control system comprises a memory for storing predetermined engine load threshold values that vary depending on engine speed. Boost pressure is lowered when the actual engine load is greater than the engine load threshold value and when the retard correction value is greater than a reference value.

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Susono, Japan

Kouichi Oosawa