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. 04, 2004
Filed:
Dec. 05, 2001
Hiroyuki Itoyama, Yokohama, JP;
Kensuke Osamura, Yokosuka, JP;
Nobusuke Toukura, Yokosuka, JP;
Hiroshi Iwano, Yokosuka, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A control unit ( ) controls an opening of an exhaust recirculation valve ( ) according to a running condition of a diesel engine ( ). The control unit ( ) calculates an equivalence ratio of the gas mixture supplied to the engine ( ) and a target intake fresh air amount taking account of the air amount in the exhaust gas recirculated by the exhaust gas circulation valve ( ), based on the opening of the valve ( ) and a target excess air factor of the engine ( ) set according to the running condition. By controlling a turbocharger ( ) according to the target intake fresh air amount, and by controlling the fuel supply mechanism according to a fuel injection amount calculated from the equivalence ratio, the excess air factor of the engine ( ) and an exhaust gas recirculation rate of the exhaust gas recirculation valve ( ) are respectively controlled to optimum values.