Patent ID: 8615983
Filing Date: 2013-12-31
Classification: F02B,F02M

Abstract:
1. A method for operating an internal combustion engine configured to operate lean of stoichiometry, comprising: employing an exhaust gas recirculation system configured as a high-pressure loop system including a conduit fluidly connected to a downpipe of the engine upstream of a turbine section of a turbocharger to recirculate a portion of an exhaust gas feedstream of the engine, said exhaust gas recirculation system including an exhaust gas treatment device comprising: reducing temperature of the portion of the exhaust gas feedstream recirculated to the intake system of the engine; and reducing mass flowrate of particulate matter and hydrocarbons borne in the recirculated portion of the exhaust gas feedstream upstream of the heat exchanger to reduce deposition of particulate matter and hydrocarbons onto and adhesion to surface areas of the heat exchanger.