EGR cooler defouling

Details EGR cooler defouling EGR cooler defouling

2011-07-05

2011-07-05

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

Reexamination Certificate

active

07971577

ABSTRACT:
A method to dislodge an adherent residue in an EGR cooler, the EGR cooler installed in an engine. The method comprises switchably flowing the exhaust gas through the exhaust-gas recirculation cooler according to a normal-calibration control mode when a temperature of the coolant is above a threshold temperature, and switchably flowing the exhaust gas through the exhaust-gas recirculation cooler according to an EGR-cooler restoring control mode (with a greater time-averaged flow of the exhaust gas) when the temperature of the coolant is below the threshold temperature.

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