Hitachi, Ltd.

Hitachi Car Engineering Co., Ltd.

Other

Norio Tomita

Yasushi Sasaki

Yasuhiro Kamimura

Kazuo Nagayama

Tsugio Tomita

Syuuichi Nakano

An electronic throttle apparatus permits aggregating of various parts and rationalization of installation, and can simplify assembling operation and wiring operation to an engine room for rationalization of an installation space. The throttle apparatus for an engine includes a throttle body housing therein a throttle valve and disposed in an air intake of the engine, a throttle actuating motor, a throttle position sensor detecting a throttle valve angle and an air flow sensor located on upstream of the throttle valve and measuring an intake air flow rate. The throttle actuating motor, the throttle position sensor and the air flow sensor are mounted on the throttle body.

Throttle apparatus for an engine

An electronic control throttle body has a default mechanism for securing the self-propelling of a vehicle at the time of faulty. A throttle control unit controls the position of a throttle valve by using a motor on the basis of a target throttle valve opening degree obtained by an engine control unit. In this respect, when the target throttle valve opening degree inputted from the engine control unit crosses over a default opening degree f0 of a default mechanism, an integration value having been added is set to 0, and an integration value having been calculated hereinafter is added to the set value to thereby perform a feedback control.

Throttle controlling device

A throttle valve control apparatus of an engine is constructed so that the poorer the response of the throttle valve, the larger the value of a control signal given as a control signal for opening of the throttle valve, whereby the speediness of control and response of the throttle valve are improved. The engine throttle valve control apparatus has means for comparing a target opening which is a control target of the throttle valve and a real opening which obtained by a sensor or the like, and obtaining a corrected target opening of the throttle valve by a map or computing, corresponding to a difference obtained as the result of the comparison.

Method of controlling throttle valve of engine and controller

Growing community of inventors

Hitachinaka, Japan

Norio Tomita