PARTICULATE FILTER WASHCOAT DIAGNOSIS BASED ON EXOTHERMIC SUBSTRATE TEMPERATURE

摘要

An exhaust gas treatment system to treat exhaust gas includes a particulate filter, a second temperature sensor and a control module. The particulate filter includes a PF substrate configured to trap particulate matter contained in the exhaust gas. The second temperature sensor is configured to output an outlet temperature signal indicating an outlet temperature at the outlet of the particulate filter. The control module is in electrical communication with the second temperature sensor to receive the outlet temperature signal. The control module determines a maximum substrate temperature of the PF substrate based on the outlet temperature. The control module is further configured to determine whether the particulate filter includes an active washcoat disposed thereon based on the maximum substrate temperature.

主权项

1. An exhaust gas treatment system to treat exhaust gas, comprising:
a particulate filter including a filter substrate configured to trap particulate matter contained in the exhaust gas; a temperature sensor configured to output an outlet temperature signal indicating an outlet temperature at the outlet of the particulate filter; and a control module in electrical communication with the temperature sensor to receive the outlet temperature signal, to determine a maximum substrate temperature of the filter substrate based on the outlet temperature, and to determine whether the particulate filter includes an active washcoat disposed thereon based on the maximum substrate temperature.