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:
Mar. 12, 2002
Filed:
Sep. 28, 2000
Tomoaki Saito, Hiroshima, JP;
Katsuaki Yasutomi, Hiroshima, JP;
Yusuke Seino, Hiroshima, JP;
Akihiro Kobayashi, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
When refreshing a catalyst ( ) disposed in an exhaust line ( ) during operation of a diesel engine ( ), diesel engine control increases supercharging pressure by throttling nozzles of a turbocharger ( ) so as to increase an amount of air that is charged into a combustion chamber ( ) and then opens an exhaust gas recirculation valve ( ) and holds it open until a exhaust gas recirculation ratio reaches a specified value. Subsequently, the diesel engine control increases an amount of fuel injection until a mean combustion chamber air-to-fuel ratio reaches a value near a stoichiometric air-to-fuel ratio so as to lower the oxygen concentration of exhaust gas, thereby causing the catalyst ( ) to release NOx therefrom and purify the exhaust gas.