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. 01, 2013
Filed:
Apr. 24, 2006
Daiji Nagaoka, Fujisawa, JP;
Masashi Gabe, Fujisawa, JP;
Daiji Nagaoka, Fujisawa, JP;
Masashi Gabe, Fujisawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
An exhaust gas purification system has a NOx purification catalyst that purifies exhaust gas of NOx when an air-fuel ratio of exhaust of an internal combustion engine mounted on a vehicle is in a lean condition and recovers purification ability when the air-fuel ratio is in a rich condition. The system performs recovery control for setting the exhaust gas to a rich air-fuel condition in order to recover the NOx purification ability of the NOx purification catalyst, and at a time of retardation of the vehicle, both a fuel system rich control and an air intake rich control are used in the recovery control. The recovery control can be performed without worsening the drive comfort of the vehicle and with less fuel consumption.