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Sensing combustion misfire events in engines by comparing signals derived from two different types of oxygen sensors
Sensing combustion misfire events in engines by comparing signals derived from two different types of oxygen sensors
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机译:通过比较来自两种不同类型的氧气传感器的信号来感知发动机的燃烧失火事件
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摘要
Method and apparatus for monitoring and/or detecting combustion misfire events in periodic combustion processes in internal combustion engines, using combustion signals derived from a first oxygen sensor exposed to exhaust gas of a periodic combustion process and a second oxygen sensor exposed to the same exhaust gas. The first oxygen sensor is resistive-based, and responds relatively faster to changes in the temperature and/or composition of the exhaust gas. The second oxygen sensor is voltaic-based or ampometric-based, and responds relatively slower to changes to the temperature and/or composition of the exhaust gas. When the temperature and/or composition of the exhaust changes rapidly but transiently due to a combustion misfire event, the different response rates of the first and second combustion signals allows for the combustion misfire event(s) to be detected. Either and/or both oxygen sensors may be used to control the engine in a conventional fashion.
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