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. 26, 2008
Filed:
Mar. 12, 2007
Taisuke Shiraishi, Yokohama, JP;
Koji Hiraya, Yokohama, JP;
Akihiko Kakuho, Yokohama, JP;
Morihiro Nagamine, Yokosuka, JP;
Daisuke Tanaka, Yokosuka, JP;
Taisuke Shiraishi, Yokohama, JP;
Koji Hiraya, Yokohama, JP;
Akihiko Kakuho, Yokohama, JP;
Morihiro Nagamine, Yokosuka, JP;
Daisuke Tanaka, Yokosuka, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A NOx emission reduction apparatus includes high-temperature EGR gas supply means for supplying a high-temperature EGR gas into an engine cylinder, low-temperature EGR gas supply means for supplying a low-temperature EGR gas into the engine cylinder and very-low-load operation control means for, as an engine load decreases in a very-low-load range, increasing an EGR rate of the high-temperature EGR gas and decreasing an EGR rate of the low-temperature EGR gas for stable engine operations and NOx emission reduction.