Patent ID: 6321721
Filing Date: 2001-11-27
Classification: F02D,Y02T

Abstract:
A fuel property detecting apparatus for detecting a property of fuel supplied to an internal combustion engine, said apparatus comprising:injection amount parameter calculating means for calculating an injection amount parameter which is an injection amount of fuel injected form a fuel injection valve or which has a correlation with said injection amount;combustion amount parameter calculating means for calculating a combustion amount parameter which is a combustion amount of fuel burned in a cylinder or which has a correlation with said combustion amount;fuel property detecting means for detecting a fuel property based on a relationship between said injection amount parameter calculated by said injection amount parameter calculating means and said combustion amount parameter calculated by said combustion amount parameter calculating means;restart judging means for judging whether said internal combustion engine is started under a warm-up condition; andfuel property detection prohibiting means for prohibiting said detection of the fuel property by said fuel property detecting means when a hot-restart is judged by said restart judging means.