| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylinder inner pressure detecting device of an internal combustion engine by which a sensor output of a cylinder inner pressure is corrected with a high degree of precision to give a precise cylinder inner pressure detected. SOLUTION: When an engine stops, a sensor output of the cylinder inner pressure when the cylinder inner pressure is near the atmospheric pressure is stored as cylinder inner pressure PCYLSiL at a low-pressure side (i=1 through 4) corresponding to reference pressure PCL at the low-pressure side. When the engine revolution speed NE is within a given value range (NEL, NEH) during engine cranking, the sensor output of the cylinder inner pressure in a compression process is stored as cylinder inner pressure PCYLSiH (S23, S24) at a high-pressure side corresponding to reference pressure PCH at the high-pressure side. According to the cylinder inner pressure PCYLSiL at the low-pressure side, the cylinder inner pressure PCYLSiH at the high-pressure side, the reference pressure PCL at the low-pressure side and the reference pressure PCH at the high-pressure side, corrected cylinder inner pressure PCYLi is calculated (S25). COPYRIGHT: (C)2005,JPO&NCIPI
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