Keihin Corporation

Kenji Ichikawa

Narihiro Takagi

Katsumi Saito

Tamikazu Mukasa

Masamitsu Shinbo

Kouji Sengoku

Koichi Okushima

A transmitting case includes a first case half integrally formed on one side of a throttle body, and a second case half coupled to the first case half. A first assembly is constructed by disposing a final gear inside the first case half and securing it to one end of a valve shaft. A second assembly is constructed by mounting on the second case half an electric motor and an intermediate gear of a speed reduction device for transmitting the rotation of an output shaft of the electric motor to the final gear. Upon coupling of the first case half and the second case half, the intermediate gear and the final gear are meshed with each other. Thus, there is provided an engine intake control system having an excellent assemblability and an improved accuracy of throttle valve opening degree.

Engine intake control system

When a stepping motor is de-energized, a valve shaft is turned in a direction to open a valve body under the resilient forces stored in a fully opening spring through a receptacle and a driven plate. At this time, a drive plate is turned in unison with the driven plate. When the valve body reaches a fully open position, a positioning finger on the drive plate abuts against a stopper pin, thus stopping the turning movement of the drive plate.

Pressure regulator for fuel cell

Growing community of inventors

Tochigi, Japan

Kenji Ichikawa