Patent ID: 6474308
Filing Date: 2002-11-05
Classification: F02D,Y02T

Abstract:
A fuel property detecting apparatus for detecting a property of fuel supplied to an internal combustion engine, comprising:injection amount parameter calculating means for calculating an injection amount parameter which is an injection amount of fuel injected from 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; intake air amount detecting means for detecting an intake air amount of said internal combustion engine; and air-fuel ratio detecting means for detecting an air-fuel ratio of exhaust gas, wherein said combustion amount parameter calculating means calculates said combustion amount by using said intake air amount and said air-fuel ratio of exhaust gas.