The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 19, 2007
Filed:
Apr. 18, 2005
Eisuke Wayama, Hitachinaka, JP;
Toshifumi Usui, Hitachinaka, JP;
Shigeru Tokumoto, Hitachinaka, JP;
Yasuo Saito, Hitachinaka, JP;
Eisuke Wayama, Hitachinaka, JP;
Toshifumi Usui, Hitachinaka, JP;
Shigeru Tokumoto, Hitachinaka, JP;
Yasuo Saito, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Car Engineering Co., Ltd., Hitachinaka-shi, JP;
Abstract
A returning spring of the electronic control throttle and a default spring for securing an initial opening degree (default opening degree) of the throttle valve have diameters different from each other, and both of the springs are held around a shaft of the throttle valve shaft and arranged between a gear attached to the throttle valve shaft and a wall portion of the throttle body. A shaft supporting gap of the throttle valve shaft is filled with an air leak preventing material, and a minimum opening degree for control 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 on control purpose of the throttle valve to the minimum opening degree.