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:
Aug. 29, 2000
Filed:
Nov. 13, 1998
Yutaka Sakai, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An idling-engine-speed control method and apparatus capable of stabilizing an engine speed before completion of warming-up even if cooling water temperatures greatly change compared to the voltage change of water temperature sensor outputs under the transition state in which the cooling-water temperature of an engine changes from a low temperature to a high temperature. A simulated water temperature setting device for generating a simulated cooling water temperature WTm operating so as to keep a holding start water temperature WT.sub.ks when a cooling water temperature WT exceeds the holding start water temperature WT.sub.ks and converge to the cooling water temperature WT in accordance with a predetermined change rate when the cooling water temperature WT exceeds a warming-up completed water temperature WT.sub.ke is used to determine the target engine speed under idling in accordance with the simulated cooling water temperature.