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:
Jan. 25, 2000
Filed:
Jul. 02, 1998
Applicant:
Inventors:
Shoichi Sakai, Atsugi, JP;
Takao Kawasaki, Yamato, JP;
Assignees:
Unisia Jecs Corporation, Atsugi, JP;
Nissan Motor Company, Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D / ; F02M / ;
U.S. Cl.
CPC ...
12333912 ;
Abstract
In an engine whose target air-fuel ratio during the idle state is set to a leaner value than a theoretical air-fuel ratio, the target air-fuel ratio is forcibly switched to the theoretical air-fuel ratio and the learning is performed, when learning a learning correction quantity of the idle rotation speed, and the learning performed by switching to said theoretical air-fuel ratio is executed only once during an on state of an ignition switch.