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AssigneesHitachi, Ltd., Hitachi Car Engineering Co., Ltd.
InventorsEisuke Wayama, Toshifumi Usui, Shigeru Tokumoto, Yasuo Saito
Estimating the term…
A returning spring 7 of the electronic control throttle and a default spring 8 for securing an initial opening degree (default opening degree) of the throttle valve 3 have diameters different from each other, and both of the springs 7, 8 are held around a shaft of the throttle valve shaft 3 and arranged between a gear 43 attached to the throttle valve shaft 3 and a wall portion of the throttle body 100. A shaft supporting gap of the throttle valve shaft 3 is filled with an air leak preventing material, and a minimum opening degree of the throttle valve is set to a value larger than an amount of overshoot of the throttle valve occurring when opening degree of the throttle valve is changed from a maximum opening degree of the throttle valve to the minimum opening degree.
A throttle device for an internal combustion engine, comprising an electric drive actuator for opening and closing a throttle valve based on a signal controlling an intake air flow rate of the internal combustion engine, wherein,
A throttle device for an internal combustion engine comprising an electric drive actuator for opening and closing a throttle valve based on a signal controlling an intake air flow rate of the internal combustion engine, wherein a gap between a throttle valve shaft driven to open and close the throttle valve by said electric drive actuator and a shaft inserting through hole for guiding said throttle valve shaft to a bearing provided in a wall portion of a throttle body is filled with an air leak preventing material.
A throttle device for an internal combustion engine, comprising an electric drive actuator for opening and closing a throttle valve based on a signal controlling an intake air flow rate of the internal combustion engine, wherein
Dependencies are inferred from the claim text.