Abnormality detection in front of the direction for a cylinder internal pressure sensor, abnormality detection method for a cylinder internal pressure sensor and control device for an internal combustion engine

摘要

An object of the present invention, it is, an abnormality of capturing before the direction for a cylinder internal pressure sensor and an abnormality detection method for a cylinder internal pressure sensor, which is capable of bias voltage loss abnormality in a cylinder internal pressure sensor can be seen.A cylinder internal pressure sensor (5) has an elongation measurement strip element (20), onto which a bias voltage was added. At an operating state of an internal combustion engine is decided whether pim / pex, namely a ratio of the intake pressure pim to the back pressure pex 1 is. Resetting of a temperature drift is carried out when pim / pex 1 is. If an output voltage v (pim), which is in the form of a basis for a calculation of pim according to the resetting of a temperature drift, equal to a circuit limit value vmin, the presence of a bias voltage loss abnormality is detected.