Mitsubishi Electric Corporation

Takayuki Yano

Shinji Watanabe

Michihiro Takata

Masaharu Yuhara

Tetsuo Maeda

Masahide Fujita

Akihiro Iwamoto

Hideaki Asakawa

Daisuke Yase

There is provided an engine control apparatus that makes it possible that, even in the case where an abnormality occurs in a microcomputer and the operations of the injectors in a series of cylinders are interrupted, there is obtained continuous driving without interruption of the engine, when the microcomputer is restored to normal condition. The microcomputer stores in a backup RAM the injection cylinder and the injection fuel amount at a time when a main fuel injection control means sequentially outputs a drive signal to each of the injectors of the cylinders. After the microcomputeris reset due to detection of an abnormality therein and then is restarted, the post-resetting injection cylinder determining meansin the microcomputer determines cylinders into which fuel could not be injected during reset period, based on an fuel injection cylinder that has been stored in a backup RAMat a time immediately prior to the resetting, and fuel is immediately and asynchronously injected into the determined cylinders at an injection fuel amount that has been stored in the backup RAMat a time immediately prior to the resetting.

Engine control apparatus

The on-vehicle electronic control device includes a main power supply circuit fed with power from an on-vehicle battery through an output contact of a power supply relay and a main power supply terminal of a connector to supply a stabilized control voltage to a microprocessor. When contact failure occurs in the main power supply terminal, the main power supply circuit is fed with bypass power from the output contact through a first electrical load and a commutation diode to perform the one of the report of the abnormality and the storage of the abnormality occurrence history information. A bypass power fed state is detected when an input voltage to the main power supply circuit is lower than a power supply voltage of the on-vehicle battery.

Power supply abnormality detection circuit for on-vehicle electronic control device

In order to obtain an electronic throttle control apparatus capable of forcibly turning a throttle valve from a full-close position toward an opening side by a predetermined opening degree to place the throttle valve in a desired opening degree position, the electronic throttle control apparatus includes: a throttle opening degree sensor for detecting an opening degree position of a throttle valve; a throttle actuator that opens and closes the throttle valve; a first target opening degree position setting unit for setting a first target opening degree position; throttle opening degree feedback control unit that performs feedback control on the throttle valve; a throttle valve full-close position judgment unit for judging whether or not the throttle valve is being urged in a direction to be closed at a full-close position; a second target opening degree position setting unit for setting a second target opening degree position; and a target opening degree position switching unit that switches a signal to be input to the throttle opening degree feedback control unit from the first target opening degree position to the second target opening degree position.

Electronic throttle control apparatus

Growing community of inventors

Kobe, Japan

Takayuki Yano