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:
Feb. 07, 2006
Filed:
Aug. 21, 2002
Takashi Shirakawa, Yokohama, JP;
Takashi Shirakawa, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A diesel engine () provided with a NOx catalyst (A) and a diesel particulate filter (B) performs lean burn operation during normal running, rich burn operation during regeneration of the NOx catalyst (A), operation under the stoichiometric air-fuel ratio during desulphating of the NOx catalyst (A), and operation under a slightly lean air-fuel ratio to regenerate the filter after desulphating of the NOx catalyst (A). When the lean burn operation is applied, a controller () first controls the fuel injection amount, and controls an air supply amount based on the fuel injection amount. When rich burn operation is applied, the controller () first controls the air supply amount and controls the fuel injection amount based on the air supply amount. Due to this control, the response of the excess air factor control is enhanced while preventing torque fluctuation accompanying the variation of the target excess air factor.