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:
Apr. 13, 2004
Filed:
Jan. 21, 2003
Magdi K. Khair, San Antonio, TX (US);
Cynthia C. Webb, San Antonio, TX (US);
Gordon J. Bartley, San Antonio, TX (US);
Christopher A. Sharp, San Antonio, TX (US);
Southwest Research Institute, San Antonio, TX (US);
Abstract
A method for controlling diesel engine emissions is disclosed. The diesel engine's exhaust system has a NO oxidation catalyst, a diesel particulate filter (DPF), and a lean NO trap (LNT). The DPF is monitored to determine the need for regeneration. The LNT is monitored to determine the need for regeneration or desulfurization. A fuel injector is used to inject fuel upstream of the LNT under certain conditions, and a bypass may be used to bypass exhaust around the oxidation catalyst to provide richer or hotter exhaust to the LNT.