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. 03, 2007
Filed:
Jul. 01, 2005
Yiqun Huang, San Antonio, TX (US);
Shizuo Sasaki, San Antonio, TX (US);
Gary D. Neely, San Antonio, TX (US);
Jeffrey A. Leet, San Antonio, TX (US);
Yiqun Huang, San Antonio, TX (US);
Shizuo Sasaki, San Antonio, TX (US);
Gary D. Neely, San Antonio, TX (US);
Jeffrey A. Leet, San Antonio, TX (US);
Southwest Research Institute, San Antonio, TX (US);
Abstract
High exhaust gas temperatures whereby sulfur is removed from a lean NOx traps simultaneously with regeneration of a Diesel particulate filter is provided by alternating engine operation in respectively defined lean and rich combustion modes. The duration and frequency of the respective lean and rich operating modes, as well as the air/fuel ratio during the respective modes, are preferably controlled by the sensed temperature of the lean NOx trap substrate.