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AssigneeGM Global Technology Operations LLC
InventorsEugene V. Gonze, Michael J. Paratore, Jr., Garima Bhatia
Estimating the term…
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.
An exhaust gas treatment system for an internal combustion engine, comprising:
A method for regenerating a particulate filter assembly in an exhaust system of an internal combustion engine having an exhaust gas conduit in fluid communication with, and configured to receive exhaust gas from, the internal combustion engine, the particulate filter assembly in fluid communication with the exhaust gas conduit and configured to receive exhaust gas flowing therethrough, the particulate filter assembly comprising an electrically heated catalyst that is configured to receive a flow of electric current, to be heated by the flow of electric current, and to thereby increase a temperature of the exhaust gas, a catalytic converter downstream of the electrically heated catalyst, a particulate filter disposed downstream of the catalytic converter to remove particulate material from the exhaust gas, a hydrocarbon injector in fluid communication with the exhaust gas conduit upstream of the electrically heated catalyst and configured to inject excess hydrocarbon into the exhaust gas flowing therethrough, an air pump in fluid communication with the exhaust gas conduit upstream of the electrically heated catalyst and configured to deliver a flow of air to the exhaust gas conduit to increase the volumetric gas flow rate and decrease the heat residence time through 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, the method comprising:
Dependencies are inferred from the claim text.