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:
Jun. 01, 2004
Filed:
Oct. 11, 2002
Cynthia Chaffin Webb, San Antonio, TX (US);
Phillip Anthony Weber, San Antonio, TX (US);
Magdi K. Khair, San Antonio, TX (US);
Southwest Research Institute, San Antonio, TX (US);
Abstract
Systems and methods for controlling diesel engine emissions, including, for example, oxides of nitrogen emissions, particulate matter emissions, and the like. The emission control system according to this invention is provided in the exhaust passageway of a diesel engine and includes a catalyst-based particulate filter; and first and second lean NO trap systems coupled to the catalyst-based particulate filter. The first and second lean NO trap systems are arranged in a parallel flow configuration with each other. Each of the first and second lean NO trap systems include a carbon monoxide generating catalyst device, a sulfur trap device, a lean NO device, a supplemental fuel injector device, and a plurality of flow diverter devices.