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:
Sep. 04, 1990
Filed:
Mar. 10, 1989
Hitachi, Ltd., Tokyo, JP;
Hitachi Automotive Engineering, Inc., Ibaraki, JP;
Abstract
An engine control apparatus in which a basic fuel injection pulse width is calculated based on various data from various sensors provided for an engine, the basic fuel injection pulse width is corrected by various factors determined based on engine conditions, and a fuel injector provided for the engine is controlled based on the corrected fuel injection pulse width, is characterized in that a period of time from a time the engine is controlled to accelerate whereby an air-fuel ratio changes into a lean state until a time the air-fuel ratio changes into a rich state is detected, and a fuel increment for the acceleration is corrected, based on the detected period of time.