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:
Oct. 17, 2006
Filed:
Jun. 05, 2002
Satoshi Nishii, Yokohama, JP;
Kenichi Sato, Yokohama, JP;
Yasuji Ishizuka, West Bloomfield, MI (US);
Satoshi Nishii, Yokohama, JP;
Kenichi Sato, Yokohama, JP;
Yasuji Ishizuka, West Bloomfield, MI (US);
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
Sulphur oxides in the exhaust gas of a vehicle engine () are trapped by a nitrogen oxide trapping catalyst (A). A controller () calculates the sulphur oxide poisoning amount of the trapping catalyst (A) from the running condition of the vehicle (S), and desulphating the sulphur oxides by a removing mechanism (). The release amount of sulphur oxides per unit time due to desulphating is set as a parameter based on the sulphur oxide poisoning amount (S), and by integrating the calculated release amount using the parameter, the current poisoning amount is calculated, and the release completion timing is precisely found.