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:
May. 29, 2012
Filed:
Apr. 20, 2006
Masashi Gabe, Fujisawa, JP;
Daiji Nagaoka, Fujisawa, JP;
Masashi Gabe, Fujisawa, JP;
Daiji Nagaoka, Fujisawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
An exhaust gas purification system performing regeneration control in a rich condition by using control of an intake system for reducing the quantity of intake air together with control of a fuel system for increasing fuel injection amount into a cylinder. Timing for injecting fuel into the cylinder is varied in response to a continuous variation of an air fuel ratio in the cylinder during switching intervals between a lean condition and the rich condition at the time of regeneration control of a NOx purification catalyst. During a period of transition to rich condition or lean condition, misfiring, combustion noise, torque variation, deterioration in drivability, and the like, due to undue advance angle or lag angle in the timing for injecting fuel into the cylinder, can thereby be prevented.