IN-CYLINDER PRESSURE DETECTION DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

The present invention determines whether or not an internal combustion engine is in an uncombusted state. As a result, when the internal combustion engine is in an uncombusted state, the maximum in-cylinder pressure (Pmax) during motoring is identified by an in-cylinder pressure sensor, and the crank angle (θPmax) corresponding to Pmax is detected by a crank angle sensor. Also, a baseline crank angle (θPmaxtgt) corresponding to the engine load factor and the engine rotational frequency is identified, and correction is performed in a manner so thatθPmax becomesθ­­ Pmaxtgt. Also, the relationship between the crank angle sensor signal and the corresponding crank angle (measured value) is corrected in a manner such that the measured value of the crank angle corresponding to Pmax becomes the post-correction crank angle.