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:
Apr. 19, 2005
Filed:
Feb. 25, 2004
Ryoichi Hanazaki, Tokyo, JP;
Mitsuyasu Kunihiro, Tokyo, JP;
Ryoichi Hanazaki, Tokyo, JP;
Mitsuyasu Kunihiro, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
Air-fuel ratio control apparatus for an engine of automobile for controlling an air-fuel ratio to a desired value includes module () for computing a purge ratio (Pr) from a purge quantity (QPRG) and an engine operation state, module () for computing a purge air concentration (Pn) from the purge ratio (Pr) and an air-fuel ratio feedback correcting coefficient (CFB), module () for computing a purge air concentration correcting coefficient (CPRG) from the purge ratio and the purge air concentration, module () for computing a fuel injection quantity (Qf) supplied to the engine () from the purge air concentration correcting coefficient, and module () for detecting an accelerating state of the automobile. The purge air concentration correcting coefficient is reset to an initial value when the purge air concentration correcting coefficient is not greater than a predetermined value (indicating leanness) and when the acceleration is detected.