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:
Feb. 20, 1996
Filed:
Aug. 25, 1994
Mitsuo Hara, Aichi, JP;
Shigeru Kamio, Nagoya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A throttle valve control apparatus for internal combustion engine stabilizes the engine speed in idle operation by always correcting the full closing reference position in ISC using a single throttle valve. Signals of a neutral position signal, air conditioner signal, electrical load signal, accelerator position signal, engine speed, and water temperature are inputted to a CPU in an electronic control unit via an input circuit. The CPU calculates such a throttle opening as to make the actual speed of the internal combustion engine in idle operation equal to a target speed in idle operation stored beforehand, compares the throttle opening with preset upper limit value and lower limit value of the throttle opening in idle operation, and corrects the full closing reference position of the throttle opening on the basis of the result of comparison. As a result, the full closing reference position in the throttle opening of the throttle valve is always corrected.