| 摘要 |
PROBLEM TO BE SOLVED: To more accurately detect cylinder pressure without using reset operation. SOLUTION: This cylinder pressure detection device is provided with a cylinder pressure sensor outputting signal according to change rate of cylinder pressure of an internal combustion engine, an integration means integrating output signal of the cylinder pressure sensor to calculate cylinder pressure, and a correction means correcting the cylinder pressure with drift correction member for removing drift of cylinder pressure to calculate corrected cylinder pressure. In an embodiment, cylinder pressure sampling is performed in a first cycle and drift amount is calculated based on the sampled cylinder pressure, over-sampling of the drift amount is performed at a cycle shorter than the first cycle, and the over-sampled drift amount is averaged to calculate the drift collection term. COPYRIGHT: (C)2006,JPO&NCIPI
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