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:
Oct. 05, 1993
Filed:
Dec. 09, 1991
Masamichi Imamura, Gumma, JP;
Japan Electronic Control Systems Co., Ltd., Isezaki, JP;
Abstract
An idle speed control system for an automotive internal combustion engine having an intake air passageway through which intake air flow to be inducted into engine cylinders. The idle speed control system is comprised of an auxiliary air control valve operatively disposed in an auxiliary air passage which is connected with the intake air passageway in a manner to bypass a throttle valve. The amount of air flowing through the auxiliary air passage is regulated by controlling the opening degree of the auxiliary air control valve under an idle operating condition in order to control idle speed. The control of the auxiliary air control valve opening degree is accomplished in accordance with a difference between model and actual torques of a power output shaft of the engine. The model torque is produced in time series in accordance with a target idle speed by using a model.