Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Takahide Kuma

Nobuyuki Kobayashi

Hiroshi Ito

Toshiaki Isobe

Nobuhisa Ohkawa

This system computes final fuel injection amount TAU on the basis of the following formula;

Learning control system of air-fuel ratio in electronic control engine

A stepping motor is driven to control an opening area of an intake air flow rate control valve such that an engine rotational speed in a substantially full-close position of a throttle valve is brought into a target rotational speed range related to at least an engine coolant temperature. An intake air quantity into an engine and engine rotational speed are detected to determine a ratio of the intake air quantity to the engine rotational speed. Downward control to the intake air flow rate control valve is inhibited when a ratio of intake air quantity into an engine to the engine rotational speed is smaller than a predetermined reference.

Growing community of inventors

Aichi, Japan

Takahide Kuma