Power plants – Internal combustion engine with treatment or handling of... – Material from exhaust structure fed to engine intake
Reexamination Certificate
2008-04-08
2008-04-08
Denion, Thomas (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
Material from exhaust structure fed to engine intake
C060S274000, C060S295000, C060S297000, C060S311000
Reexamination Certificate
active
07353648
ABSTRACT:
An engine (10) uses a method for counteracting the effect of soot accumulation in a diesel particulate filter (DPF38) in a diesel engine exhaust system (16) on the control of exhaust gas recirculation (EGR) through an EGR system (40). Engine speed (N) and indicated engine torque (TQI) data are processed to select from a map (62) a data value for present EGR volumetric efficiency. The selected data value and certain other data, including data that accounts for present soot accumulation in the DPF, are processed to develop a data value indicative of present total mass flow. The data value indicative of present total mass flow and still other data are processed to develop flow control data for controlling flow of exhaust gas through the EGR system.
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Aakew Gerald W.
Calfa Jeffrey P.
Denion Thomas
International Engine Intellectual Property Company LLC
Tran Diem
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