Patent ID: 6748924
Filing Date: 2004-06-15
Classification: F02D,F02M

Abstract:
A fuel injection control system, comprising:a fuel rail to which a plurality of fuel injectors are connected; a high-pressure pump disposed to provide pressurized fuel to the fuel rail; (a check valve disposed between said high-pressure pump and said fuel rail, said check valve leading fuel to flow from the high-pressure pump to the fuel rail; a fuel-pressure control valve disposed in a fuel bypass line communicating between an output port of said high-pressure pump and an input port of said high-pressure pump, said fuel-pressure control valve selectively opening and closing said fuel bypass line; and a controller for controlling an opening and closing operation of said fuel-pressure control valve on the basis of fuel injection timing, an amount of fuel injected, and a delay time of said fuel-pressure control valve such that fuel pressure inside said fuel rail approaches an optimal fuel pressure.