Crankcase blow-by gas treatment assembly and method of treating blow-by gas
AssigneeInternational Engine Intellectual Property Company, LLC
InventorsEdward M. Derybowski, Brad J. Adelman
Life of this patent
Estimating the term…
Abstract
A blow-by treatment assembly (10) for a vehicle having an engine (22) emitting blow-by gas (18) includes a duct (16) for receiving blow-by gas from the engine. A catalyst trap (14) is disposed in fluid communication with the duct (16). The catalyst trap (14) removes hydrocarbon emissions from the blow-by gas (18). A pump (12) pumps the blow-by gas (18) through the catalyst trap (14). An outlet (32) is in fluid communication with the catalyst trap (14) for emitting the blow-by gas to either the ambient or to a tailpipe.
Claims20
1) A blow-by treatment assembly for a vehicle having an engine emitting blow-by gas, the blow-by treatment assembly comprising:
- a duct for receiving blow-by gas from the engine;
- a catalyst trap disposed in fluid communication with the duct, wherein the catalyst trap removes hydrocarbon emissions from the blow-by gas;
- a pump for pumping the blow-by gas through the catalyst trap;
- and
- an outlet in fluid communication with the catalyst trap for emitting the blow-by gas to one of an ambient and a tailpipe.
10) A method of treating blow-by gas of an engine before release to the ambient, the method comprising the steps of:
- transporting the blow-by gas from the engine to a mist separator;
- separating an oil mist out from the blow-by gas at a mist separator;
- pumping the blow-by gas from the mist separator to a hydrocarbon trap;
- absorbing at least a first portion of hydrocarbon emission from the blow-by gas at the hydrocarbon trap;
- transporting the blow-by gas from the hydrocarbon trap through a diesel oxidation catalyst;
- and
- emitting the blow-by gas to one of an ambient and a tailpipe.
15) A blow-by treatment assembly for a vehicle having an engine emitting blow-by gas, the blow-by treatment assembly comprising:
- a mist separator for separating an oil mist from the blow-by gas emitted by the engine;
- a duct in fluid communication with the mist separator for receiving the blow-by gas from the mist separator;
- a hydrocarbon trap disposed in fluid communication with the duct, wherein the hydrocarbon trap removes at least a first portion of hydrocarbon emissions from the blow-by gas;
- a pump for pumping the blow-by gas from the mist separator to the hydrocarbon trap;
- a diesel oxidation catalyst in fluid communication with and downstream from the hydrocarbon trap;
- and
- an outlet in fluid communication with the diesel oxidation catalyst for emitting the blow-by gas to one of an ambient and a tailpipe.
Dependencies are inferred from the claim text.