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:
Nov. 30, 1993
Filed:
Mar. 24, 1993
Tsuyoshi Sodeno, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An engine idle speed control system is designed to perform a transient correction in order to prevent an idle engine speed of an internal combustion engine from being made unstable by a load of an auxiliary unit, such as an air conditioner of a vehicle. The idle speed control system comprises an idle control valve provided in a bypass passage bypassing a throttle valve disposed in an intake passage of the engine, and a controller for controlling the idle engine speed by manipulating the opening degree of the idle control valve. The controller increases the opening degree of the idle control valve transiently when the load of the auxiliary unit is applied, and then decreases the opening degree with passage of time.