Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Christopher A. Sharp0
Cynthia C. Webb0
Magdi K. Khair0
Yiqun Huang0
Date of Patent
March 27, 2007
Patent Application Number
11288891
Date Filed
November 29, 2005
Patent Primary Examiner
Patent 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.
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