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:
Mar. 27, 2007
Filed:
Nov. 29, 2005
Magdi K. Khair, San Antonio, TX (US);
Yiqun Huang, San Antonio, TX (US);
Christopher A. Sharp, San Antonio, TX (US);
Cynthia C. Webb, San Antonio, TX (US);
Magdi K. Khair, San Antonio, TX (US);
Yiqun Huang, San Antonio, TX (US);
Christopher A. Sharp, San Antonio, TX (US);
Cynthia C. Webb, San Antonio, TX (US);
Southwest Research Institute, San Antonio, TX (US);
Abstract
A method and system for controlling the temperature of recirculated exhaust gas in an exhaust gas recirculation (EGR) system, such as those used in connection with diesel engines. An EGR loop (which may be either a high pressure loop or a low pressure loop) has a dual-leg segment with an EGR cooler on one leg and an EGR heater on the other leg. By means of a valve, the EGR gas may be diverted to either one leg or the other, thereby providing either cooled or heated EGR gas to the engine.