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AssigneeGM Global Technology Operations LLC
InventorsChad E. Marlett, Cristian Taibi, Luca Giuseppe Pairolero
Estimating the term…
An exhaust aftertreatment system includes a particulate filter element and a particulate matter sensor that is disposed to monitor the exhaust gas feedstream downstream of the particulate filter element. A method for monitoring the exhaust gas feedstream includes determining a temperature associated with the particulate matter sensor and monitoring engine operation and the exhaust aftertreatment system. A magnitude of ammonia is determined in the exhaust gas feedstream proximal to the particulate matter sensor based upon the monitoring of the engine operation and the exhaust aftertreatment system. An initial reading is determined from the particulate matter sensor and is adjusted based upon the magnitude of ammonia in the exhaust gas feedstream proximal to the particulate matter sensor and the temperature of the particulate matter sensor. A magnitude of particulate matter in the exhaust gas feedstream is determined based upon the adjusted initial reading from the particulate matter sensor.
A method for monitoring an exhaust gas feedstream downstream relative to a particulate filter element, wherein the particulate filter element is disposed in an exhaust aftertreatment system for an internal combustion engine, and wherein a particulate matter sensor is disposed to effect the monitoring, the method comprising:
An exhaust aftertreatment system disposed to purify an exhaust gas feedstream from an internal combustion engine, comprising:
Dependencies are inferred from the claim text.