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, 1999
Filed:
Mar. 25, 1998
Hiromichi Miwa, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An error learning value Dqsol* in an idle running state is calculated based on a difference Dqsol0 between a command signal Qsol2A when the engine is in the idle running state and an estimated fuel injection amount Qsolib necessary to maintain the idle running state. An injection amount error Dqsol1 is calculated from the error learning value Dqsol* and an estimated real injection amount Qsol.sub.-- real is calculated from the current command signal Qsol2 and the injection amount error Dqsol1. By varying the estimated fuel injection amount Qsolib according to a loading condition of said engine, a fuel injection amount can be estimated precisely in various running states.