Patent ID: 8061138

Claim:
A method for controlling contaminant deposition in an exhaust gas recirculation system including a gas recirculation circuit having a cooler comprising: directing an overall flow of exhaust gas with an overall mass flow rate from an exhaust assembly of an engine through the gas recirculation circuit back to an air inlet assembly of the engine so as to reduce an amount pollutants produced during operation on the engine; establishing a mass flow rate of a flow of exhaust gas in the cooler; measuring at least one flow parameter of the flow of exhaust gas in the cooler path, said parameter being at least one of exhaust gas mass flow rate, exhaust gas back pressure, exhaust gas pressure, exhaust gas temperature and combinations thereof; controlling, based on the at least one flow parameter, the flow of exhaust gas in the cooler to be a turbulent flow; and removing deposits from the cooler with the turbulent flow.