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:
Mar. 26, 1991
Filed:
Jul. 26, 1989
Yasuhisa Arai, Saitama, JP;
Norio Suzuki, Saitama, JP;
Ichiro Sakai, Saitama, JP;
Koji Sasajima, Saitama, JP;
Shusuke Akazaki, Saitama, JP;
Yuji Kawaguchi, Saitama, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
Throttle control system for a vehicular internal combustion engine equipped with a stepper motor connected to a throttle valve provided at an engine air intake passage, wherein the position (the opening degree) of the throttle valve is controlled by the stepper motor in response to the vehicular engine operation. In one embodiment, various throttle positions are once determined including positions for engine idling and vehicle cruising and the largest of the positions is selected for optimally satisfying the whole operating condition. In another embodiment, when the engine is idling, the throttle valve is controlled such that engine speed converges toward a target speed. In the other embodiment, the stepper motor is varied its pulse rate and chopping duty for optimally control the throttle position according to the vehicular engine operation.