Patent ID: 8434434
Filing Date: 2013-05-07
Classification: F01M,F01N,Y02A,Y02T

Abstract:
1. A blow-by treatment assembly for a vehicle having an engine emitting blow-by gas from a gap between a piston ring and a cylinder wall, the engine having a crankcase emitting the blow-by gas, the blow-by treatment assembly comprising: a duct for receiving blow-by gas from the crankcase of the engine, the duct in fluid communication with the crankcase; a mist separator in fluid communication with the duct, the mist separator in downstream fluid communication from the crankcase; a catalyst trap disposed in fluid communication with the duct and located in downstream fluid communication with the mist separator, the catalyst trap comprising a hydrocarbon trap for trapping at least a portion of the hydrocarbons in the blow-by gas not removed by the mist separator upstream from and adjacent to a diesel oxidation catalyst having a heating element for bringing the diesel oxidation catalyst to a light off temperature so that the hydrocarbon trap does not achieve a temperature where the stored hydrocarbons on the hydrocarbon trap physically evolve before the diesel oxidation catalyst has achieved the light off temperature necessary to burn the stored hydrocarbons a pump for pumping the blow-by gas through the catalyst trap, wherein the pump is downstream of the crankcase, wherein the blow-by gas is not combined with exhaust gas from the engine before treatment; and an outlet in fluid communication with the catalyst trap for emitting the blow-by gas to one of an ambient and a tailpipe.