Abstract: A particulate filter assembly includes an electrode assembly, a particulate filter positioned in an electrode gap defined between two electrodes of the electrode assembly, a power supply electrically coupled to the electrode assembly, and a controller for controlling operation of the power supply to apply a regenerate-filter signal to the electrode assembly to oxidize particulates collected by the particulate filter. An associated method of regenerating the particulate filter is disclosed.

Abstract: A circuit for providing a potential difference across a gap between two electrodes of a fuel reformer, oxides of nitrogen trap or soot filter regenerator for an internal combustion engine or the like. The circuit includes a power source, a transformer including a primary winding and a secondary winding for coupling across the electrodes. The power source is coupled to the primary winding. A switch or switches is/are coupled to the primary winding.

Abstract: A diesel engine exhaust system includes a NOx absorber and a diesel fuel fired burner operated at an enriched fuel-to-air ratio to generate a sufficient quantity of CO and H2 for regenerating the NOx absorber. A method of operating a diesel exhaust system is also disclosed.

Abstract: A method of monitoring engine performance as a function of soot accumulation in a particulate filter includes determining characteristics of soot accumulation in the filter, analyzing the characteristics, and generating an error signal if the characteristics are indicative of predetermined engine performance conditions. An electronic controller configured to monitor soot accumulation in such a manner is also herein disclosed.

Abstract: A control unit for controlling operation of a fuel-fired burner includes a housing having an air inlet which is open to an interior chamber of the housing. An air pump is positioned in the interior chamber of the housing and has an air inlet which is open to the interior chamber of the housing. The air pump generates reduced air pressure in the interior chamber which draws air into the housing and into the pump's inlet. This flow of air cools an electronic controller along with other components position in the housing. The air pump may be operated to draw air from the interior chamber of the housing and supplies the air to a combustion chamber of the fuel-fired burner to facilitate operation of the burner. An associated method of advancing air to a fuel-fired burner is also disclosed.

Abstract: A method of operating a fuel-fired burner of an emission abatement assembly includes supplying a reduced amount of fuel to the fuel-fired burner in response to detection of a burner shutdown request. Such a reduced fuel supply continues for a predetermined time period after which fuel is no longer supplied to the burner. The supply of both combustion air and atomization air, along with spark generation, continues for a period of time after the fuel is shutoff. An emission abatement assembly is also disclosed.

Abstract: A fuel-fired burner for use with an emission abatement device comprises a pair of electrodes. Each electrode comprises an arc-contact rod to generate an electrical arc therebetween.

Abstract: The present invention involves thermal management of an integrated emission reduction system for the removal of particulate matter (PM) and nitrogen oxides (NOx) from diesel engine exhaust streams. The inventive integrated emission reduction system may include a diesel particulate filter (DPF), a heat source for adjusting the temperature of the exhaust stream entering the DPF, at least one selective catalytic reducer of NOx, a heat exchanger for adjusting the temperature of the exhaust stream entering the NOx reducer, and a computing device for monitoring the temperature and/or pressure of the exhaust stream entering the DPF and the NOx reducer, and for controlling the operation of the heat exchanger and heat source, thereby improving the efficiency of the DPF and the NOx reducer.

Abstract: The present invention provides an apparatus and a method for removing particulate matter from exhaust gas stream prior to emission. The apparatus comprises a chargeable device having at least a pair of chargeable surfaces. The chargeable surfaces are positioned relative to one another to form a gap. The apparatus further comprises a charger for supplying opposite electrical charges to the chargeable surfaces. When chargeable surfaces are charged, an electrical field is created within the gap. Exhaust particles passing through the electrical field will locally reduce the dielectric constant of the exhaust gas causing an electrical arc to pass through the particles. The heat generated by the electrical arc will cause the particles to combust, resulting in emissions of carbon dioxide.

Abstract: The present invention involves thermal management of an integrated emission reduction system for the removal of particulate matter (PM) and nitrogen oxides (NOx) from diesel engine exhaust streams. The inventive integrated emission reduction system may include a diesel particulate filter (DPF), a heat source for adjusting the temperature of the exhaust stream entering the DPF, at least one selective catalytic reducer of NOx, a heat exchanger for adjusting the temperature of the exhaust stream entering the NOx reducer, and a computing device for monitoring the temperature and/or pressure of the exhaust stream entering the DPF and the NOx reducer, and for controlling the operation of the heat exchanger and heat source, thereby improving the efficiency of the DPF and the NOx reducer.

Abstract: The present invention involves thermal management of an integrated emission reduction system for the removal of particulate matter and NOx from diesel engine exhaust streams. The inventive integrated emission reduction system may include a diesel particulate filter (DPF), a heat source for adjusting the temperature of the exhaust stream entering the DPF, at least one catalytic absorber of NOx, a heat exchanger for adjusting the temperature of the exhaust stream entering the NOx absorber, and a computing device to monitor the temperature of the exhaust stream entering the DPF and the NOx absorber, and to control the operation of the heat exchanger and heat source, thereby improving the efficiency of the DPF and the NOx absorber.

Abstract: An exhaust processor includes a soot filter and a filter regenerator. The filter regenerator is configured to burn off particulate matter collected in the soot filter to regenerate the soot filter.

Abstract: An exhaust processor includes a soot filter and a filter regenerator. The filter regenerator is configured to burn off particulate matter collected in the soot filter to regenerate the soot filter.

Abstract: An exhaust processor includes a soot filter and a filter regenerator. The filter regenerator is configured to burn off particulate matter collected in the soot filter to regenerate the soot filter.

Abstract: An active noise cancellation system is used to quiet engine exhaust noise. Combustion product from an engine passes through a conduit to an acoustical mixing chamber located in the tailpipe. A microphone senses noise in the vicinity of the tailpipe and provides a signal to a control unit. The control unit generates a controlling signal sent to one or more speakers mounted in a housing that is coupled to the tailpipe. Sound produced by the speakers enters the mixing chamber to mix with and cancel sound from the combustion product exiting he conduit. Some embodiments include a muffler housing forming an interior chamber which is divided into two sub-chambers. Other embodiments include a muffler having an outer housing enclosing an inner housing. Variations have been devised regarding the number of speakers mounted in each chamber and the way in which they are mounted.