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INTRA-CYLINDER PRESSURE SENSOR FAULT DIAGNOSTIC DEVICE AND INTRA-CYLINDER SENSOR SENSITIVITY CORRECTION DEVICE PROVIDED WITH SAME
INTRA-CYLINDER PRESSURE SENSOR FAULT DIAGNOSTIC DEVICE AND INTRA-CYLINDER SENSOR SENSITIVITY CORRECTION DEVICE PROVIDED WITH SAME
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机译:同时提供的缸内压力传感器故障诊断装置和缸内传感器灵敏度校正装置
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摘要
The invention has an object to provide an intra-cylinder pressure sensor fault diagnostic device that ensures an opportunity for fault diagnosis in a wide operation region, and can accurately detect an intra-cylinder pressure with a high S/N ratio. The fault diagnostic device for an intra-cylinder pressure sensor (16), which outputs a value corresponding to an intra-cylinder pressure of an internal combustion engine delays ignition timing so that firing timing comes after a compression top dead center to generate peaks of the intra-cylinder pressure before firing and after firing respectively (S 100). When the ignition timing is delayed, at least one of an output value of the intra-cylinder pressure sensor in the peak of the intra-cylinder pressure before firing (hereinafter, called a pre-firing output peak value) and a crank angle thereof is detected (S110). A fault of the intra-cylinder pressure sensor (16) is determined by using at least one of the pre-firing output peak value and the crank angle thereof (S 140).
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