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. 10, 1999
Filed:
Jul. 28, 1998
Katsuhiko Toyoda, Shizuoka-ken, JP;
Suzuki Motor Corporation, Hamamatsu, JP;
Abstract
An air-fuel ratio controller for an internal combustion engine, which controller is capable of: properly correcting an air-fuel ratio after a start-up explosion; preventing inconveniences such as occurrence of an engine stall, a decrease in an engine rotational speed, and a discharge of exhaust gases containing harmful components; and, allocating an idle time-learning value with reference to a rotational engine speed that is obtained at the time of engine start-up, thereby enhancing convenience of use. To this end, the air-fuel ratio controller is provided with an additional feature whereby it is determined, in executing a rotational engine speed-determining item of an idle time-learning region condition, that the rotational engine speed-determining item is satisfied when a rotational engine speed is equal to or less than a value obtained by addition of an ISC target rotational speed and a predetermined value, the predetermined value including either a fixed value or a variable value, the variable value being mapped on a table for each water temperature.