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AssigneeGM Global Technology Operations LLC
InventorsJaime Andres Cespedes Garcia, Giuseppe Mazzara Bologna, Maria Camuglia, Carlos Idefonso Hoyos Velasco, David Tulli
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An after-treatment system includes a selective catalyst reduction on filter (SCRF) device in communication with exhaust gases from an engine yielding treated exhaust gases. A nitrogen oxides (NOx) sensor is configured to measure the treated exhaust gases and has an output signal that is NOx and ammonia (NH3) cross-sensitive. A NOx sensor model is coupled to receive the output signal and mass flow data for the treated exhaust gases and provides a NOx model signal to an electronic control unit (ECU) that is operatively associated with the after-treatment system and the engine. The NOx model signal represents an exhaust gas NOx concentration estimate based upon an actual NOx concentration and an actual NH3 concentration of the exhaust gas. The ECU is operable upon the NOx concentration estimate to control the after-treatment system and the engine to effect an overall reduction in actual NOx concentration of the treated exhaust gases.
An exhaust gas after-treatment system for an internal combustion engine comprising:
A controller for a vehicle internal combustion engine exhaust gas after-treatment system, the exhaust gas treatment system including a selective catalyst reduction on filter (SCRF) exhaust gas after-treatment device in communication with exhaust gases from the internal combustion engine and having a treated exhaust gas output, an oxides of nitrogen (NOx) sensor coupled to the treated exhaust gas output, the NOx sensor having a NOx sensor output signal that is NOx and ammonia (NH3) cross-sensitive, and an electronic control unit (ECU) operatively coupled to the internal combustion engine and the exhaust gas after-treatment system, the controller comprising:
A method of controlling a vehicle internal combustion engine exhaust gas after-treatment system, the exhaust gas treatment system including a selective catalyst reduction on filter (SCRF) exhaust gas after-treatment device in communication with exhaust gases from the internal combustion engine and having a treated exhaust gas output, an oxides of nitrogen (NOx) sensor coupled to the treated exhaust gas output, the NOx sensor having a NOx sensor output signal that is NOx and ammonia (NH3) cross-sensitive, and an electronic control unit (ECU) operatively coupled to the internal combustion engine and the exhaust gas after-treatment system, the method comprising:
Dependencies are inferred from the claim text.