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:
Jul. 06, 1999
Filed:
May. 05, 1997
Applicant:
Inventors:
Toshihiro Fukumasu, Susono, JP;
Yoshiaki Atsumi, Susono, JP;
Takayuki Otsuka, Susono, JP;
Hiroshi Kanai, Susono, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
123680 ;
Abstract
An air-fuel ratio control device for an internal combustion engine of a vehicle is disclosed. The device controls the air-fuel ratio with a target value which is larger than the stoichiometric air-fuel ratio, as a control center, in an idle condition. The target value is changed to become small when an amount of intake air in an idle condition is larger than a predetermined value.