| 摘要 |
An emissions control system for a vehicle configured to travel on a road is provided. The system typically includes a catalyst coupled to the exhaust gas path; a linear universal exhaust gas oxygen (UEGO) sensor coupled to the exhaust gas path upstream of the catalyst and configured to measure oxygen content in exhaust gas from the engine upstream of the catalyst; a heated exhaust gas oxygen (HEGO) sensor positioned adjacent the catalyst and configured to measure oxygen content in exhaust gas from the engine; a temperature sensor coupled to the engine; and a controller coupled to the engine and configured to receive an input signal from the HEGO sensor that is indicative of oxygen content in the exhaust gas, to receive an input signal from the temperature sensor that is indicative of engine temperature, to adjust the HEGO sensor input signal based on the input signal from the temperature sensor, and to control the air-fuel ratio based on the adjusted HEGO sensor input during engine warm up.
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