Aisan Kogyo Kabushiki Kaisha

Tsutomu Nishitani

Toru Sakurai

Sunao Kitamura

Takashi Tsuge

A throttle device with a throttle body and first and second supports supporting a motor for controlling the opening position of the throttle of a valve. The first and second supports support the motor from both sides of the motor in the longitudinal direction. At least one of the first and second supports may also elastically support the motor, and may be a metallic leaf spring disposed within the throttle body.

Throttle devices having motors supported by elastic, metallic support members

A throttle gear is fastened to a throttle shaft . A relief lever is pivotally mounted on the throttle shaft . A return spring urges the relief lever in a valve closing direction with respect to a throttle body . The throttle body contacts the relief lever at a second contact position A when the relief lever pivots to a predetermined pivot position B in the valve closing direction. A relief spring urges the throttle gear in a valve opening direction with respect to the relief lever . The relief lever contacts the throttle gear at a first contact position B when the throttle gear pivots to the predetermined pivot position B in the valve opening direction. The first and second contact positions B, A are located within or to one side of a plane P that is perpendicular to the rotational axis L of the throttle shaft . Plane P preferably includes a third position C at which the biasing force of the return spring acts on the relief lever

Throttles

A throttle control apparatus for an internal combustion engine in which wear particles due to sliding between components and vibration wear particles produced between components by engine vibrations are prevented from entering the area between a brush of a throttle sensor and a sensor substrate to prevent the occurrence of a contact failure between the brush and the substrate, thereby making it possible to detect an accurate throttle opening. A brush of a sensor unit is secured to an outer end portion of a throttle shaft projecting from a cover, and the sensor unit is accommodated in a sensor chamber formed outside the cover. A gear chamber for accommodating gears and the sensor chamber are isolated from each other by a dust seal. Therefore, wear particles will not enter the sensor chamber and accumulate in the area between the brush and the sensor substrate to cause a contact failure.

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Obu, Japan

Tsutomu Nishitani