Mitsubishi Denki Kabushiki Kaisha

Takayuki Yano

Koji Nishimoto

Ryoichi Hanazaki

Tsuneo Tanabe

Satoshi Hashimoto

A engine control device includes a failure judgment means for making at least a failure judgment of an intake pipe pressure sensor. The failure judgment means includes a first data processing for outputting an estimated intake pipe pressure signal, a second data processing for outputting a modification estimated intake pipe pressure signal in which the estimated intake pipe pressure signal is modified, and a failure judgment processing for making a failure judgment of at least the intake pipe pressure sensor by comparing the measured intake pipe pressure signal with the modification estimated intake pipe pressure signal. The modification estimated intake pipe pressure signal has a change portion changing between a change portion of the estimated intake pipe pressure signal and a change portion of the measured intake pipe pressure signal, when the throttle valve opening degree is changed.

Engine control device

A device for controlling the amount of the air taken in by an engine, for improving the starting performance of when the accelerator pedal is depressed from the idling state. The device comprises a throttle control means,A for operating a target throttle opening degree &thgr;o of a throttle valve,based on said throttle opening degree &thgr;, an accelerator opening degree &agr; and an idle signal D, and a throttle actuator,for opening and closing said throttle valve so that said throttle opening degree comes into agreement with said target throttle opening degree, wherein said throttle control means includes a means,for operating a first target throttle opening degree &thgr;o,based on said accelerator opening degree, a means,for operating a second target throttle opening degree &thgr;o,based on the idle signal, and a means,for operating a target throttle opening degree &thgr;o by adding up the first and second target throttle opening degrees together.

Device for controlling the amount of the air taken in by an engine

A device for controlling the vehicle to travel at a constant speed, which clearly distinguishes a downhill road over a flat road while the vehicle is traveling at a constant speed, and resets or resumes the overdrive position in order to stably maintain a vehicle speed at all times. The device comprises a downhill control means,for resetting the overdrive position of an automatic transmission,when the vehicle is traveling a downhill, wherein the downhill control means includes a downhill state detection means,for detecting the downhill state of the vehicle based on the throttle opening degree &thgr; and the vehicle speed Vs, and an overdrive reset means,for resetting the overdrive position of the automatic transmission in response to the downhill state, wherein the reset state of the overdrive position is maintained while the downhill state is being detected, and the throttle valve opening degree is used as a reference for judging that the overdrive is resumed from the state of being shifted down.

Growing community of inventors

Hyogo, Japan

Takayuki Yano