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:
Jan. 25, 2005
Filed:
Nov. 20, 2002
Clifford Norman Montreuil, Livonia, MI (US);
Joseph Robert Theis, Rockwood, MI (US);
Clifford Norman Montreuil, Livonia, MI (US);
Joseph Robert Theis, Rockwood, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
The present invention discloses a method for reducing NOin exhaust gases of an internal combustion engine. The purpose of this invention is to convert engine out NO(approximately 90% NO in diesel exhaust) into roughly a 50:50 mixture of NO and NO, while simultaneously oxidizing engine-out hydrocarbons which interfere with the reduction of NOby urea or ammonia. The present invention demonstrates that a 50:50 blend of NO and NOis reduced more rapidly and with higher efficiency than a gas stream which is predominantly NO. In addition, catalyst in an engine exhaust that is a 50:50 mixture of NO and NOis far more resistant to hydrothermal deterioration than using NO alone. In another embodiment of the present invention, a vehicle exhaust system utilizing the method of the present invention is provided.