To provide an abnormality judgement device of a pressure condition detecting apparatus which can appropriately judge abnormalities including a waveform abnormality of the pressure condition detecting apparatus.
The abnormality judgement device 1 of the pressure condition detecting apparatus 10 detects the pressure condition PCYL within a cylinder 3a of an internal combustion engine 3. The abnormality judgement device 1 includes a fuel supply stop means 6 for stopping supply of fuel to the internal combustion engine 3 during operation of the internal combustion engine 3, a state-of-change parameter calculation means 2 for continuously calculating a plurality of state-of-change parameters θ representing states of change of the pressure condition for a certain period based on the pressure condition detected when the supply of fuel to the internal combustion engine 3 is stopped by the fuel supply stop means, and an abnormality judgement means 2 for judging the abnormalities of the pressure condition detecting apparatus based on the transition of the calculated state-of-change parameters.
HASEGAWA MAMORU
KITAYAMA YOSHITO
SAKAMOTO HIDEKI
YAMAGUCHI SATOSHI
