Patent ID: 8720192

Claim:
An exhaust gas treatment system for an internal combustion engine, the internal combustion engine having an engine off condition, comprising: an exhaust gas conduit in fluid communication with, and configured to receive an exhaust gas from the internal combustion engine; a particulate filter (“PF”) device in fluid communication with the exhaust gas conduit and having a filter structure for removal of particulates in the exhaust gas, the PF device selectively regenerated based on an amount of particulates trapped within the filter structure of the PF device during the engine off condition; an electric heater disposed upstream of the filter structure and selectively energized to provide heat for regeneration of the PF device; a primary energy storage device; a plurality of secondary energy storage devices that are selectively connected to the primary energy storage device, the plurality of secondary energy storage devices selectively energizing the electric heater; a plurality of switching elements that selectively connect in a series configuration and a parallel configuration the plurality of secondary energy storage devices; and a control module in communication with the electric heater, the primary storage device, the plurality of secondary energy storage devices, and the internal combustion engine, the control module receiving a regeneration signal indicating the amount of particulates trapped within the filter structure of the PF device, the control module comprising: a control logic for disconnecting the plurality of secondary energy storage devices from the primary storage device if the internal combustion engine is in the engine off condition; and a control logic for connecting the plurality of secondary energy storage devices to the electric heater if the regeneration signal is received.