JPH05296100

PURPOSE:To prevent any mistaken control caused by a mistaken input signal by performing the arithmetic process in response to an angle position and a cylinder position which are detected by a sensor for each determined rotational angle of an internal combustion engine, and by distinguishing ignition noise and a cylinder judging signal when the internal combustion engine is controlled. CONSTITUTION:In a controller 5, engine driving information like a crank angle position detecting sensor signal or the like is input in an I/O port 4, and this input signal is computed together with each information of RAM 2 or ROM 3, thereby control signals such as an ignition signal and an INJ driving signal are output from the I/O port 4. In this case, within the determined angle and the determined time from the time when the cylinder judging signal is output to the time when the next cylinder judging signal is output, it the determined angle has passed after detecting the falling signal of the angle position detecting sensor, and also it the rising signal is generated in the angle position detecting sensor after the ignition, it is taken as the ignition noise to distinguish it from the cylinder judging signal. Therefore, the mistaken control caused by a mistaken signal is prevented.