JUDGING METHOD FOR DETERIORATION OF INTERNAL CYLINDER PRESSURE SENSOR

摘要

PROBLEM TO BE SOLVED: To discriminate the deterioration of a cylinder internal pressure sensor accurately. ;SOLUTION: In this judging method of deterioration in a cylinder internal pressure sensor 4, during the F/C operation of an engine 3 (step 1), cylinder internal pressure P being detected by this cylinder internal pressure sensor 4 is subjected to sampling (step 3), seeking the inlet pipe internal pressure PB, and then the specified reference cylinder internal pressure Pcb is compensated according to this inlet pipe internal pressure PB (steps 5 and 7). Then, on the basis of compensated reference cylinder internal pressure Pc and the cylinder internal pressure P, the deterioration of the cylinder internal pressure sensor is judged (step 8 to 100.;COPYRIGHT: (C)2000,JPO