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. 28, 2001
Filed:
Dec. 08, 1999
Applicant:
Inventors:
Tosiaki Yonekura, Hyogo, JP;
Hideaki Katashiba, Tokyo, JP;
Satoshi Wachi, Tokyo, JP;
Hirofumi Ohuchi, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02D 4/304 ;
U.S. Cl.
CPC ...
F02D 4/304 ;
Abstract
In order to improve estimation accuracy of estimating the value of the NOx exhaust concentration, the air fuel ratio control apparatus is adapted to estimate the NOx exhaust concentration from at least either one of a value depending on the air fuel ratio or a value depending on the exhaust gas recirculation quantity and a value depending to the ignition timing by means of the ECU