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:
Jan. 17, 1995
Filed:
Apr. 29, 1993
Kazuhiro Nishigaki, Gifu, JP;
Hitoshi Tasaka, Chiryu, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A throttle valve drive apparatus comprises an actuator which serves to mechanically drive a throttle valve disposed in an intake passage of an internal combustion engine and is controlled in accordance with an instruction from a control unit, an accelerator lever which serves to mechanically drive the throttle valve and to adjust the opening degree of the throttle valve in accordance with an amount of operation performed by an operator, a first clutch disposed between rotary shafts of the actuator and the throttle valve and serving to transmit a turning force from the actuator to the throttle valve, and a second clutch disposed between rotary shafts of the accelerator lever and the throttle valve and serving to transmit the turning force from the accelerator lever to the throttle valve. In this apparatus, an engaging force of the first clutch is discriminated from that of the second clutch, one of the first and second clutches has a greater engaging force comprising an on-off constant engagement type clutch, the other clutch having a smaller engaging force comprising a constant engagement type clutch, and the on-off type clutch is switched on and off so as to transmit the turning force to the throttle valve selectively from the actuator or the accelerator lever.