Combination emission abatement assembly and method of operating the same
AssigneeArvin Technologies, Inc.
InventorsWilliam Taylor III, Prasad Tumati, Michael J. Daniel
Life of this patent
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Abstract
A combination emission abatement assembly includes a first emission device such as a NOX trap and a second emission abatement device such as a soot particulate filter. Reformate gas from a fuel reformer is used to selectively regenerate both the NOX trap and the soot particulate filter. A method of operating an emission abatement device is also disclosed.
Claims19
A method of operating a combination emission abatement assembly having a NOX trap and a soot particulate filter, the method comprising the steps of:
- determining if regeneration of the NOX trap is to be performed and generating a regenerate-trap signal in response thereto,
- operating a fuel reformer so as to produce and advance a reformate gas to the NOX trap in response to generation of the regenerate-trap signal,
- determining if regeneration of the soot particulate filter is to be performed and generating a regenerate-filter signal in response thereto, and
- operating the fuel reformer so as to produce and advance a reformate gas to the soot particulate filter in response to generation of the regenerate-filter signal.
A combination emission abatement assembly, comprising:
- a NOX trap having a reformate gas inlet,
- a soot particulate filter having a reformate gas inlet,
- a fuel reformer having a reformate gas outlet fluidly coupled to both the reformate gas inlet of the NOX trap and the reformate gas inlet of the soot particulate filter, and
- an electronic control unit electrically coupled to the fuel reformer, the electronic control unit comprising (i) a processor, and (ii) a memory device electrically coupled to the processor, the memory device having stored therein a plurality of instructions which, when executed by the processor, causes the processor to:
- (a) determine if regeneration of the NOX trap is to be performed and generate a regenerate-trap signal in response thereto,
- (b) operate the fuel reformer so as to produce and advance a reformate gas to the NOX trap in response to generation of the regenerate-trap signal,
- (c) determine if regeneration of the soot particulate filter is to be performed and generate a regenerate-filter signal in response thereto, and
- (d) operate the fuel reformer so as to produce and advance a reformate gas to the soot particulate filter in response to generation of the regenerate-filter signal.
The combination emission abatement assembly, wherein the soot particulate filter is positioned downstream of the NOX trap.
A combination emission abatement assembly, comprising:
- a NOX trap for removing NOX from an exhaust gas of an internal combustion engine,
- a soot particulate filter for removing soot from the exhaust gas of the internal combustion engine, the soot particulate filter being positioned downstream from the NOX trap, and
- a plasma fuel reformer for reforming a hydrocarbon fuel into a reformate gas, the plasma fuel reformer being fluidly coupled to both the NOX trap and soot particulate filter.
Dependencies are inferred from the claim text.