Honda Giken Kogyo Kabushiki Kaisha

Sakae Suzuki

Toru Kitamura

Akira Kato

Toshiaki Hirota

Jun Takahashi

Hisashi Igarashi

Akira Katoh

Yasuo Takagi

A control system for an automatic transmission of an internal combustion engine installed on an automotive vehicle measures a duration over which the automatic transmission continues to be in a speed position. Downshift of the speed position of the transmission to a lower speed position is inhibited if the measured duration does not exceed a predetermined time period, when it is determined that the automotive vehicle is in a predetermined decelerating condition.

Control system for automatic transmissions

A control system for an internal combustion engine for use in a vehicle. An ECU determines whether the catalytic converter is in a predetermined high temperature condition, and also determines whether the engine has continuously been in an operating condition in which the rotational speed of the engine exceeds a predetermined value and load on the engine exceeds a predetermined value, over a predetermined time period. When the catalytic converter is in the predetermined high temperature or when the engine has continuously been in the above high speed and high load condition over the predetermined period, the ECU controls the throttle valve in a manner such that the opening of the throttle valve is decreased.

Control system with function of protecting catalytic converter for

Growing community of inventors

Wako, Japan

Sakae Suzuki