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:
Jun. 06, 1989
Filed:
Feb. 24, 1988
Hideaki Ishikawa, Katsuta, JP;
Taiji Hasegawa, Nakaminato, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An engine control apparatus comprises a plurality of sensors for detecting the operation state of an engine, means for calculating, on the basis of signals produced from the sensors, a correction amount which corrects a predetermined controllable quantity, means for calculating a learned correction amount by averaging values of the correction amount by a reference occurrence frequency, means for calculating, under a predetermined condition, the learned correction amount by averaging values of the correction amount by an occurrence frequency which is smaller than the reference occurrence frequency, and means for correcting the controllable quantity in accordance with the correction amount and the learned correction amount.