Cylinder discriminating apparatus for internal combustion engine

摘要

A device for discriminating cylinders in an internal combustion engine includes a rotational fluctuation detecting means for detecting a rotational fluctuation in an internal combustion engine on the basis of a rotary signal, cylinder discriminating means for discriminating a cylinder on the basis of the time interval between reference angular positions, inhibiting means for inhibiting cylinder discrimination by said cylinder discrimination means when the rotational fluctuation detecting means detects a rotational fluctuation, and cylinder predicting means for predicting and discriminating a cylinder from the past cylinder discrimination result when said inhibiting means inhibits cylinder discrimination by the said cylinder discriminating means. Thus, the cylinder discriminating device for an internal combustion engine with no error irrespectively of the running state of the engine.