Patent ID: 6230096
Filing Date: 2001-05-08
Classification: F02D

Abstract:
A cylinder identification apparatus for an internal combustion engine, comprising:a crank angle sensor for detecting a rotational position of a crankshaft of the internal combustion engine having a plurality of cylinders in generating a series of angle signals;cylinder identifying means for identifying each of the plurality of cylinders based on a signal output from the crank angle sensor;engine controlling means for controlling the internal combustion engine based on the result of cylinder identification carried out by the cylinder identifying means; andnoise determining means for determining, before operational processing is implemented based on a particular angle signal, whether the particular angle signal among output signals from the crank angle sensor includes noise, so that the noise determining means inhibits subsequent operational processing if there is noise included in the particular angle signal,wherein when the noise determining means receives a present particular angle signal, it effects noise determination on all of a series of angle signals from a last said particular angle signal to the present said particular angle signal at the same time.