Patent ID: 6318152
Filing Date: 2001-11-20
Classification: F02D,Y02T

Abstract:
A fuel property judgement apparatus for an internal combustion engine, comprising:a crank angle sensor for generating a crank angle signal corresponding to an rpm of the internal combustion engine and a crank angle position;a starter switch for outputting a start signal at the time of starting operation of the internal combustion engine;an initial combustion detecting means for detecting an initial combustion at the time of starting operation of the internal combustion engine in response to the start signal;a turn-on number counting means for counting a turn-on number of the crank angle signal during a period from the operation start of the internal combustion engine to the detection of the initial combustion;a standard number setting means for setting a standard number which is a judgement standard for the fuel property of the internal combustion engine;a turn-on number comparing means for comparing the turn-on number with the standard number to yield a comparison result; anda fuel property judgement means for determining the fuel property on the basis of the comparison result of said turn-on number comparing means.