Abstract: A control method for a heating device of an oxidation catalyst is provided. The control method includes: estimating an accumulation of particulate matter on the heating device; and selectively controlling a switching device in electrical communication with the heating device based on the estimated accumulation.

Abstract: An exhaust treatment system for an engine includes a selective catalyst reduction (SCR) treatment module that controls a valve and an air pump to deliver air to an SCR catalyst in response to the engine turning off. An SCR loading module controls the valve and the air pump to deliver air to an exhaust manifold and controls a dosing system to deliver a dosing agent upstream of the SCR catalyst when a temperature of the SCR catalyst is less than a temperature threshold and the SCR catalyst is not saturated with ammonia.

Abstract: An exhaust gas treatment system for an internal combustion engine is provided, including an exhaust gas conduit, an oxidation catalyst (“OC”) device, an electrically heated catalyst (“EHC”) device, a selective catalytic reduction (“SCR”) device, and a control module. The OC device is in fluid communication with the exhaust gas conduit. The OC device adsorbs hydrocarbons and is selectively activated to induce oxidation of the hydrocarbons in the exhaust gas. The EHC device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The EHC device is located within the OC device and is selectively activated to produce heat and induce further oxidation of the exhaust gas. The EHC device has an oxidation catalyst compound disposed thereon for converting nitrogen oxide (“NO”) to nitrogen dioxide (“NO2”).

Abstract: An exhaust gas treatment system for an internal combustion engine comprises a particulate filter assembly configured to receive exhaust gas from the engine. The particulate filter assembly comprises an electrically heated catalyst, a particulate filter disposed downstream of the electrically heated catalyst, a hydrocarbon injector, in fluid communication with the exhaust gas, upstream of the electrically heated catalyst and configured to inject excess hydrocarbon into the exhaust gas, an air pump in fluid communication with the exhaust gas upstream of the electrically heated catalyst and configured to deliver air to the exhaust gas to increase the volumetric gas flow rate through, and to decrease the heat residence time in, the particulate filter and a controller configured to operate the hydrocarbon injector, the electrically heated catalyst and the air pump based on predetermined exhaust gas flow rates, temperature thresholds and particulate loadings within the particulate filter.

Abstract: An exhaust gas particulate filter system for an internal combustion engine comprises an exhaust gas conduit in fluid communication with, and configured to receive exhaust gas from, the internal combustion engine. A hydrocarbon supply is connected to the exhaust gas conduit and is in fluid communication with the exhaust gas for delivery of hydrocarbon thereto. A particulate filter assembly is located downstream of the hydrocarbon injector for receipt of the exhaust gas and hydrocarbon mixture. The particulate filter assembly comprises an exhaust gas filter disposed therein for removal of particulates from the exhaust gas and an electrically heated catalyst device disposed therein, upstream of the exhaust gas filter, and heatable to induce oxidation of the exhaust gas and hydrocarbon mixture and to heat the exhaust gas filter and burn particulates collected therein.

Abstract: A system includes a particulate matter (PM) filter that includes multiple zones. An electrical heater includes heater segments that are associated with respective ones of the zones. The electrical heater is arranged upstream from and proximate with the PM filter. A post-fuel injection system injects fuel into at least one of a cylinder of an engine and an exhaust system. A control module is configured to operate in a first mode that includes activating the electrical heater to heat exhaust of the engine. The control module is also configured to operate in a second mode that includes activating the post-injection system to heat the exhaust. The control module selectively operates in at least one of the first mode and the second mode.

Abstract: A control system comprises a particulate matter (PM) filter, an electric heater, a first heating module, and a second heating module. The PM filter includes M zones that filter PM from exhaust gas. The electric heater includes M segments corresponding to the M zones that heat exhaust gas input to selected ones of the M zones when activated. The first heating module activates N of the M segments to heat exhaust gas input to N of the M zones to regenerate the N zones. The second heating module operates in one of a first mode and a second mode to regenerate other ones of the M zones after the N zones are regenerated. The first mode includes adjusting an air-fuel ratio of the exhaust gas. The second mode includes activating other ones of the M segments to heat exhaust gas input to other ones of the M zones.

Abstract: An exhaust gas treatment system is provided, having an internal combustion engine, an exhaust gas conduit, an electrically heated catalyst (“EHC”) device, an oxidization catalyst (“OC”) device, an OC temperature sensor, a hydrocarbon (“HC”) adsorber, and a control module. The hydrocarbon supply is selectively activated for delivery of a hydrocarbon and formation of an exhaust gas and hydrocarbon mixture therein. The EHC device is selectively activated to produce heat and induce oxidization. The OC device is in fluid communication with the exhaust gas conduit and located downstream of the EHC device. The OC temperature sensor is in fluid communication with the exhaust gas conduit and located downstream of the OC device. The HC adsorber is located downstream of the EHC device. The control module is in communication with the hydrocarbon supply, the EHC device, the OC device, the OC temperature sensor, and the HC adsorber.

Abstract: A control system comprises a combustion control module and a regeneration control module. The combustion control module controls operation of a vehicle in a first mode during which a combustion engine is off and in a second mode during which the combustion engine is on. The regeneration control module is in communication with the combustion control module and activates an electric heater during the first mode to heat an inlet of a particulate matter (PM) filter. Exhaust gas produced by the combustion engine enters the inlet and initiates a regeneration cycle of the PM filter in the second mode.

Abstract: A power system and a method for energizing an electrically heated catalyst are provided. The system includes a battery outputting a first voltage, and a generator outputting a second voltage greater than the first voltage in response to a first signal. The system further includes a controller that generates a second signal to set a first switching device to a first operational state to apply the second voltage to the electrically heated catalyst to increase a temperature of the catalyst, if a first temperature level of the catalyst is less than a first threshold temperature level. The controller generates a third signal to induce the generator to output a third voltage, and generates a fourth signal to set a second switching device to a second operational state to apply the first voltage to the catalyst, if the first temperature level is greater than the first threshold temperature level.

Abstract: A system includes a particulate matter (PM) filter with an upstream end for receiving exhaust gas, a downstream end and zones. The system also includes a heating element. A control module selectively activates the heating element to inductively heat one of the zones.

Abstract: An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine. A grid of electrically resistive material is applied to an exterior upstream surface of the PF and selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF. A catalyst coating applied to at least one of the PF and the grid. A control module estimates a temperature of the grid and controls the engine to produce a desired exhaust product to increase the temperature of the grid.

Abstract: An exhaust gas treatment system is provided having an internal combustion engine, an exhaust gas conduit, a passive selective catalyst reduction (SCR) device, a heated SCR device, and a control module. The exhaust gas conduit is in fluid communication with and is configured to receive an exhaust gas from the internal combustion engine. The passive SCR device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The passive SCR includes a passive SCR temperature profile. The heated SCR device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The heated SCR device is located upstream of the passive SCR. The heated SCR is selectively activated to produce heat. The control module is in communication with the heated SCR and the engine and includes a control logic for determining the passive SCR temperature profile.

Abstract: A system includes a particulate matter (PM) filter that includes an upstream end for receiving exhaust gas and a downstream end. A zoned resistive heater is arranged spaced from said upstream end and includes N zones, where N is an integer greater than one, wherein each of the N zones includes M sub-zones, where M is an integer greater than or equal to one, and wherein the zoned heater includes an electrically insulating material. A control module selectively activates at least a selected one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones and deactivates non-selected ones of the N zones.

Abstract: A power system and a method for energizing an electrically heated catalyst are provided. The system includes a first battery outputting a first voltage, and a second battery outputting a second voltage. The system further includes a switching device having a first operational state where the first and second batteries are coupled in series to one another, and a second operational state where the first and second batteries are coupled in parallel to one another. The system further includes a generator coupled to the first battery, and when the switching device is in the second operational state the generator supplies a third voltage to the first battery to charge the first and second batteries, and to the electrically heated catalyst such that the catalyst heats exhaust gases upstream of an oxidation catalyst.

Abstract: An exhaust system that processes exhaust generated by an engine is provided. The system includes: a particulate filter (PF) that is disposed downstream of the engine and that filters particulates from the exhaust; and a grid that includes electrically resistive material that is segmented by non-conductive material into a plurality of zones and wherein the grid is applied to an exterior upstream surface of the PF.

Abstract: A system includes a particulate matter (PM) filter that includes X zones. An electrical heater includes Y heater segments that are associated with respective ones of the X zones. The electrical heater is arranged upstream from and proximate with the PM filter. A valve assembly includes Z sections that are associated with respective ones of the X zones. A control module adjusts flow through each of the Z sections during regeneration of the PM filter via control of the valve assembly. X, Y and Z are integers.

Abstract: Control methods for regenerating particulate filter and an apparatus that includes an internal combustion engine, an exhaust gas conduit in fluid communication with and configured to receive exhaust gas from the internal combustion engine, and a particulate filter assembly in fluid communication with the exhaust gas conduit and configured to receive exhaust gas flowing therethrough. The particulate filter assembly includes a particulate filter to remove particulates from the exhaust gas, a heater device disposed near a front face of the particulate filter, to supply heat for regeneration of the particulate filter after shut-off of the internal combustion engine, and an air pump to input air into the particulate filter to transfer the supplied heat from the heater device to the particulate filter.

Abstract: An exhaust gas after treatment system for an engine comprises an oxidation catalyst NOx adsorber wherein an oxidation catalyst compound and a NOx adsorber compound are disposed. A fuel injector is connected to and is in fluid communication with the oxidation catalyst NOx adsorber device for delivery of a hydrocarbon fuel thereto and an air pump is connected to and is in fluid communication with the oxidation catalyst NOx adsorber device for delivery of air thereto. The fuel injector and the air pump supply fuel and air to the oxidation catalyst NOx adsorber device for oxidation thereof and heating of the NOx adsorber compound to a NOx release temperature following shut down of the internal combustion engine.

Abstract: A system includes an electrical heater and a particulate matter (PM) filter that is arranged one of adjacent to and in contact with the electrical heater. A control module selectively increases an exhaust gas temperature of an engine to a first temperature and that initiates regeneration of the PM filter using the electrical heater while the exhaust gas temperature is above the first temperature. The first temperature is greater than a maximum exhaust gas temperature at the PM filter during non-regeneration operation and is less than an oxidation temperature of the PM.