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. 18, 2010
Filed:
Apr. 05, 2005
Takao Onodera, Fujisawa, JP;
Wei Wu, Fujisawa, JP;
Takashi Haseyama, Fujisawa, JP;
Takuro Iwashita, Fujisawa, JP;
Atsushi Matsunuma, Fujisawa, JP;
Shigeru Ikeda, Fujisawa, JP;
Toshio Miyazaki, Fujisawa, JP;
Takao Onodera, Fujisawa, JP;
Wei Wu, Fujisawa, JP;
Takashi Haseyama, Fujisawa, JP;
Takuro Iwashita, Fujisawa, JP;
Atsushi Matsunuma, Fujisawa, JP;
Shigeru Ikeda, Fujisawa, JP;
Toshio Miyazaki, Fujisawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
The present invention provides an engine exhaust gas purification device comprising a filter B provided in an exhaust passage () of an engine () for trapping particulate matter contained in the exhaust gas, a catalyst A for regenerating the filter B by burning the particulate matter trapped in the filter B, an EGR valve () provided in an EGR passage () linking the intake side and exhaust side of the engine, an injector () for injecting fuel into a cylinder, and control unit () for controlling the injector () and EGR valve (). During regeneration of the filter B, the control unit () close the EGR valve () when fuel injection from the injector () is controlled to supply unburned fuel components to the catalyst A, and open the EGR valve () when no fuel is injected from the injector () upon a request for speed reduction or the like. In so doing, residual unburned fuel components in the EGR passage () are scavenged by air.