초록 ▼

A fuel system of an internal combustion engine comprises a fuel tank for storing fuel, a fuel injection valve disposed on the internal combustion engine, a fuel supply pipeline connecting between the fuel tank and the fuel injection valve, a fuel pump for supplying the fuel in the fuel tank to the f

A fuel system of an internal combustion engine comprises a fuel tank for storing fuel, a fuel injection valve disposed on the internal combustion engine, a fuel supply pipeline connecting between the fuel tank and the fuel injection valve, a fuel pump for supplying the fuel in the fuel tank to the fuel injection valve through the fuel supply pipeline, a fuel injection pressure regulator for regulating the fuel injection pressure of the fuel injection valve to a predetermined pressure, a fuel return pipeline through which surplus fuel from the fuel injection pressure regulator is returned into the fuel tank, and a pressure increasing device disposed in the fuel return pipeline and serving to increase the pressure in the fuel return pipeline above the pressure in the fuel tank while maintaining fuel pressure regulating function of the fuel injection pressure regulator.

대표청구항 ▼

A fuel system of an internal combustion engine comprising: a fuel tank for storing fuel; a fuel injection valve disposed on the internal combustion engine; a fuel supply pipeline connecting between said fuel tank and said fuel injection valve; a fuel pump for supplying the fuel in said fuel tank to

A fuel system of an internal combustion engine comprising: a fuel tank for storing fuel; a fuel injection valve disposed on the internal combustion engine; a fuel supply pipeline connecting between said fuel tank and said fuel injection valve; a fuel pump for supplying the fuel in said fuel tank to said fuel injection valve through said fuel supply pipeline; a fuel injection pressure regulator for regulating the fuel injection pressure of said fuel injection valve to a predetermined pressure; a fuel return pipeline through which surplus fuel from said fuel injection pressure regulator is returned into said fuel tank; and pressure increasing means disposed in said fuel return pipeline for increasing the pressure in said fuel return pipeline above the pressure in said fuel tank so that the fuel pressure as abruptly reduced by said fuel injection pressure regulator is larger than the pressure in said fuel tank, said pressure increasing means comprising a mechanical choke having a cross-sectional area that is gradually reduced in the flow direction of the fuel so as to prevent an abrupt pressure reduction from occurring in said mechanical choke.