Abstract: An emission abatement assembly includes a fuel-fired burner having a combustion chamber and a particulate filter positioned downstream of the fuel-fired burner. A mixing baffle is positioned between the fuel-fired burner and the particulate filter.

Abstract: A catalyst is positioned downstream of a thermal enhancer, such as a fuel-fired burner for example. A doser injects hydrocarbons into the thermal enhancer to maintain exhaust gas temperatures such that the catalyst is in an active condition and to raise exhaust gas temperatures to a level such that a diesel particulate filter can be regenerated.

Abstract: A fuel-fired combustor includes a housing with a combustion chamber. The housing has an inlet and an outlet. A fuel inlet to the housing supplies fuel to the combustion chamber. An igniter ignites a mixture of exhaust gas and fuel to produce a flame for increasing an internal temperature. At least one sensor measures or monitors at least one combustor characteristic and generates a corresponding combustor characteristic signal. A controller receives the combustor characteristic signal, compares the combustor characteristic signal to a predetermined combustor criteria and generates an output signal to change at least one combustor operating condition if the combustor characteristic signal varies from the predetermined combustor criteria.

Abstract: An emission abatement assembly includes a fuel-fired burner having a combustion chamber and a particulate filter positioned downstream of the fuel-fired burner. A mixing baffle is positioned between the fuel-fired burner and the particulate filter.

Abstract: An emission abatement assembly includes a fuel-fired burner having a combustion chamber and a particulate filter positioned downstream of the fuel-fired burner. A mixing baffle is positioned between the fuel-fired burner and the particulate filter.

Abstract: A vehicle auxiliary power unit includes a turbine to provide a turbine output, a fuel-fired burner that provides a heat source for the turbine, and a heat exchanger that receives the turbine output. The heat exchanger generates a heat exchanger output to produce a predetermined output condition such as heating/cooling a cabin compartment, heating an exhaust component to a desired temperature, and/or heating an engine block, for example.

Abstract: A method of operating an emission abatement assembly includes separating the exhaust gas flow entering through the gas inlet port of the fuel-fired burner into a combustion flow which is advanced through the combustion chamber, and a bypass flow which bypasses the combustion chamber. An emission abatement assembly is also disclosed.

Abstract: A control system for a pump in a vehicle exhaust system includes a pump having an inlet port and an outlet port, a fluid supply in fluid communication with the inlet port, and a supply line in fluid communication with the outlet port. The supply line is configured to deliver fluid to an exhaust component. A controller is configured to adjust pump flow rate to maintain a desired pressure in the supply line. A restriction is utilized in a return flow path from the supply line.

Abstract: A method and apparatus for identifying a component failure within a thermal regenerator operates as follows. The burner control unit monitors at least one of a fuel pump characteristic for a fuel pump and an ignition system characteristic for an ignition system. The fuel pump is used to supply fuel to a fuel-fired burner and the ignition system is used to ignite fuel supplied to the fuel-fired burner. The fuel pump characteristic is communicated to the burner control unit which compares the fuel pump characteristic to a predetermined fuel pump criteria. The ignition system characteristic is communicated to the burner control unit which compares the ignition system characteristic to a predetermined ignition system criteria. The burner control unit identifies a fuel pump failure when the fuel pump characteristic does not meet the fuel pump criteria, and identifies an ignition system failure when the ignition system characteristic does not meet the ignition system criteria.

Abstract: An airless nozzle and fuel deliver system for a fuel-fired burner sprays fuel droplets for ignition to increase heat for regenerating an exhaust component. A source of pressurized fuel delivers pressurized fuel to a first fuel injector. In response to a first control signal, the first fuel injector is opened and fuel pressure is increased to a desired level to open a valve such that the fuel can be delivered to the airless nozzle. The airless nozzle sprays fuel droplets for a period of time that the first fuel injector is open. In response to a second control signal, the first fuel injector is closed and a second fuel injector is opened such that fuel is vented to decrease fuel pressure between the valve and the first fuel injector to stop the spray of fuel droplets by closing the valve.

Abstract: An airless nozzle and fuel deliver system for a fuel-fired burner sprays fuel droplets for ignition to increase heat for regenerating an exhaust component. A source of pressurized fuel delivers pressurized fuel to a first fuel injector. In response to a first control signal, the first fuel injector is opened and fuel pressure is increased to a desired level to open a valve such that the fuel can be delivered to the airless nozzle. The airless nozzle sprays fuel droplets for a period of time that the first fuel injector is open. In response to a second control signal, the first fuel injector is closed and a second fuel injector is opened such that fuel is vented to decrease fuel pressure between the valve and the first fuel injector to stop the spray of fuel droplets by closing the valve.

Abstract: A catalyst is positioned downstream of a thermal enhancer, such as a fuel-fired burner for example. A doser injects hydrocarbons into the thermal enhancer to maintain exhaust gas temperatures such that the catalyst is in an active condition and to raise exhaust gas temperatures to a level such that a diesel particulate filter can be regenerated.

Abstract: A method and apparatus for identifying a component failure within a thermal regenerator operates as follows. The burner control unit monitors at least one of a fuel pump characteristic for a fuel pump and an ignition system characteristic for an ignition system. The fuel pump is used to supply fuel to a fuel-fired burner and the ignition system is used to ignite fuel supplied to the fuel-fired burner. The fuel pump characteristic is communicated to the burner control unit which compares the fuel pump characteristic to a predetermined fuel pump criteria. The ignition system characteristic is communicated to the burner control unit which compares the ignition system characteristic to a predetermined ignition system criteria. The burner control unit identifies a fuel pump failure when the fuel pump characteristic does not meet the fuel pump criteria, and identifies an ignition system failure when the ignition system characteristic does not meet the ignition system criteria.

Abstract: A method of starting up a fuel-fired burner of an emission abatement assembly includes lowering the fuel rate being supplied to the burner once flame ignition is detected. The fuel rate is maintained at this lower level as the assembly preheats. Once preheated, the fuel level is ramped up to a predetermined operational fuel level. An emission abatement assembly is also disclosed.

Abstract: A fuel-fired combustor includes a housing with a combustion chamber. The housing has an inlet and an outlet. A fuel inlet to the housing supplies fuel to the combustion chamber. An igniter ignites a mixture of exhaust gas and fuel to produce a flame for increasing an internal temperature. At least one sensor measures or monitors at least one combustor characteristic and generates a corresponding combustor characteristic signal. A controller receives the combustor characteristic signal, compares the combustor characteristic signal to a predetermined combustor criteria and generates an output signal to change at least one combustor operating condition if the combustor characteristic signal varies from the predetermined combustor criteria.

Abstract: A vehicle auxiliary power unit includes a turbine to provide a turbine output, a fuel-fired burner that provides a heat source for the turbine, and a heat exchanger that receives the turbine output. The heat exchanger generates a heat exchanger output to produce a predetermined output condition such as heating/cooling a cabin compartment, heating an exhaust component to a desired temperature, and/or heating an engine block, for example.

Abstract: A method of operating a control unit of an emission abatement assembly includes communicating with an engine control unit of an internal combustion engine. An emission abatement assembly is also disclosed.

Abstract: An emission abatement assembly includes a first particulate filter having a first fuel-fired burner associated therewith and a second particulate filter having a second fuel-fired burner associated therewith. A control unit controls operation of both the first fuel-fired burner and the second fuel-fired burner. A method of operating an emission abatement assembly is also disclosed.

Abstract: A method of monitoring ash buildup in a particulate filter includes determining particulate accumulation in the filters subsequent to filter regeneration to determine when the filter is in need of servicing to remove ash there from. An emission abatement assembly is also disclosed.

Abstract: An emission abatement assembly includes a fuel-fired burner having a combustion chamber and a particulate filter positioned downstream of the fuel-fired burner. A mixing baffle is positioned between the fuel-fired burner and the particulate filter.