Internal-combustion engines – Charge forming device – Exhaust gas used with the combustible mixture
Reexamination Certificate
2007-03-27
2007-03-27
Wolfe, Jr., Willis R. (Department: 3747)
Internal-combustion engines
Charge forming device
Exhaust gas used with the combustible mixture
C060S605200
Reexamination Certificate
active
11288891
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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Huang Yiqun
Khair Magdi K.
Sharp Christopher A.
Webb Cynthia C.
Baker & Botts L.L.P.
Southwest Research Institute
Wolfe, Jr. Willis R.
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