System and method for treating particulate matter vented from an engine crankcase

摘要

System and methods for treating particulate matter vented from an engine crankcase are provided. In one embodiment, an engine includes a crankcase. A ventilation hose is coupled to the engine to vent a crankcase gas from the crankcase. A catalytic emissions control device is coupled to the ventilation hose to treat particulate matter in the crankcase gas.

主权项

1. A rail-vehicle system comprising:
an engine including a crankcase; a ventilation hose coupled to the engine to vent a crankcase gas from the crankcase; a catalytic emissions control device coupled to the ventilation hose to treat particulate matter in the crankcase gas; an exhaust line coupled to the ventilation hose downstream of the catalytic emissions control device, the exhaust line connecting the ventilation hose to an exhaust stack; an intake line coupled to the ventilation hose downstream of the catalytic emissions control device, the intake line connecting the ventilation hose to an air-intake passage; a valve positioned downstream of the catalytic emissions control device, the valve being adjustable to direct the crankcase gas from the emissions control device to one or more of the exhaust line or the intake line; and a controller configured to adjust a state of the valve to direct the crankcase gas from the catalytic emissions control device to the intake line when a temperature of the catalytic emissions control device is less than a temperature threshold, and adjust the state of the valve to direct the crankcase gas from the catalytic emissions control device to the exhaust line when the temperature of the catalytic emissions control device is greater than the temperature threshold.