Patent ID: 6125832
Filing Date: 2000-10-03
Classification: F02D

Abstract:
A fuel supply apparatus of an engine, comprising a low pressure pump and a high pressure pump each for pressurizing and delivering fuel to be injected by an injector of the engine of direct injection type, a fuel pressure sensor for detecting fuel pressure, a variable fuel pressure regulator for controlling the fuel pressure, and operational state detecting means for detecting an operational state of the engine, a fuel pressure setting means for setting a target fuel pressure according to the operational state and a variable fuel pressure regulator driving means for driving said variable fuel pressure regulator to get the target fuel pressure, whereinsaid fuel supply apparatus further comprises an accident judging means for judging an accident of said fuel supply apparatus by the relationship between the fuel pressure valve used for fuel feedback control by said variable fuel pressure regulator driving means and driving duty of said variable fuel pressure regulator driving means being outside an upper or lower limit value for a predetermined period of time.