Engine Control Device and Engine Control Method

The present invention provides an engine control device that sets a cam signal read value according to a cam signal output from a cam angle sensor, in a front-rear determination position; if the cam signal read value is alternately changed between 1 (LOW) and 2 (HIGH) in the front-rear determination position, sets the cam signal read value to the cam signal expected value; if the cam signal read value is not alternately changed between 1 (LOW) and 2 (HIGH), inverts the cam signal expected value in the control cycle of the previous time, and sets the resultant cam signal expected value; then, when the cam signal read value and the cam signal expected value are equal to each other, distinguishes the cylinders by using the cam signal read value; and when the cam signal read value and the cam signal expected value are different from each other, distinguishes the cylinders by using the cam signal expected value.