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:
Oct. 19, 2004
Filed:
Dec. 18, 2002
Applicant:
Inventor:
Jiro Kondo, Kariya, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/00 ;
U.S. Cl.
CPC ...
F01N 3/00 ;
Abstract
An engine control system has a controller and intake control devices for controlling air amount introduced into each of the cylinders. The controller has a lean burn control block and a warm up control block. Both blocks operate two cylinders under a lean air-fuel ratio, and operate remaining two cylinders under a rich air-fuel ratio. Both blocks control at least the intake control devices to adjust air-fuel ratio.