Patent ID: 6805106
Filing Date: 2004-10-19
Classification: F02D,F02M

Abstract:
A fuel-injection system comprising:a fuel tank storing fuel; a fuel injector injecting the fuel; a fuel pump inducting the fuel from the fuel tank and discharging pressurized fuel into a fuel supply line that is connected one end to the fuel pump and connected at the other end to the fuel injector; a pressure regulator disposed in a middle of the fuel supply line and located upstream of the fuel injector for regulating a pressure of the fuel flowing through the fuel supply line and for returning surplus fuel via the pressure regulator into the fuel tank; a reflux pipe arrangement that is located downstream of the fuel injector and connected at one end to a downstream end of the fuel supply line and connected at the other end to the fuel tank; and a reflux control device disposed in a middle of the reflux pipe arrangement for controlling a flow rate of the fuel flowing through the reflux pipe arrangement, wherein the reflux control device controls a flow rate of the fuel flowing through the reflux control device to a smaller value than a flow rate of the surplus fuel flowing through the pressure regulator to the fuel tank.