Catalytic burner system for dpf regeneration
AssigneeInternational Engine Intellectual Property Company, LLC
InventorsVadim Olegovich Strots, Rade Milanovic
Life of this patent
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Abstract
A system and method of effective regeneration of a diesel particulate filter used in the exhaust system of a diesel engine during low engine operating temperatures, is disclosed. Generally speaking, a catalytic burner system and method used in filter regeneration on a diesel engine comprises a burner diesel oxidation catalyst (BDOC) coupled to an exhaust flow of the diesel engine, a mixer fluidly coupled to the BDOC, a diesel oxidation catalyst (DOC) fluidly coupled to the mixer, and a diesel particulate filter (DPF) fluidly coupled to the DOC, wherein the BDOC directs the exhaust flow through the mixer, the DOC and the DPF during a regeneration cycle of the DPF under low engine temperature operating conditions.
Claims24
A catalytic burner system for use in regeneration of a filter in an exhaust system on a diesel engine, the burner system comprising:
- a burner diesel oxidation catalyst (BDOC) having an inlet for receiving an exhaust flow from the diesel engine and an outlet at an opposing end;
- a mixer fluidly coupled to the outlet of the BDOC;
- a diesel oxidation catalyst (DOC) fluidly coupled to the mixer;
- and,
- a diesel particulate filter (DPF) fluidly coupled to the DOC, wherein the BDOC channels the exhaust flow through the mixer, the DOC and the DPF during a regeneration cycle of the DPF under low engine temperature operating conditions.
A method for regenerating a diesel engine particulate filter (DPF) during periods of low engine operating temperatures, the method comprising the steps of:
- channeling a portion of exhaust flow toward a first chamber;
- restricting the flow velocity of the exhaust flow as it enters the chamber;
- expanding the flow velocity of the exhaust flow as it leaves the chamber;
- catalytically oxidizing the exhaust flow in a second chamber;
- maintaining a pre-determined regeneration temperature between the first chamber and the second chamber;
- and,
- regenerating the DPF.
A method for regenerating a diesel engine particulate filter during periods of low engine operating temperatures, the method comprising the steps of:
- fluidly coupling components of an exhaust gas treatment system package to an engine exhaust system of the diesel-engine vehicle;
- channeling the flow of exhaust gases through the components of the treatment system package;
- and,
- maintaining a pre-determined temperature for regeneration.
A catalytic burner system for use in regeneration of a particulate filter in an exhaust system on a diesel engine, the burner system comprising:
- means for channeling a portion of exhaust flow;
- and,
- means for maintaining a pre-determined temperature for filter regeneration at low operating temperatures.
Dependencies are inferred from the claim text.