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:
Mar. 22, 1988
Filed:
Nov. 17, 1986
Michio Suzuki, Hekinan, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
An apparatus for controlling an air-fuel ratio for an internal combustion engine in which the air-fuel ratio is controlled to the leaner side of a stoichiometric air-fuel ratio in a normal operating condition. As the speed reduction ratio decreases, the air-fuel ratio is controlled so as to become increasingly leaner than the stoichiometric air-fuel ratio. Thus, when the speed reduction ratio is relatively large, the air-fuel ratio is controlled so as to be richer than a critical air-fuel ratio concerning misfire, thereby preventing occurrence of a surge in the engine output which would otherwise be caused by a change in combustion state. When the speed reduction ratio is relatively small, the air-fuel ratio is made to approach said critical air-fuel ratio in order to decrease the rate of fuel consumption.