Patent ID: 6422206
Filing Date: 2002-07-23
Classification: F02B,F02M,Y02T,Y10T

Abstract:
A direct injection fuel system for an internal combustion engine, comprising:a fuel tank; a fuel rail; a fuel supply line connecting the fuel tank and the fuel rail; a pump for pumping fuel from the fuel tank to the fuel rail via the fuel supply line; a plurality of fuel injectors in fluid communication with the fuel rail, wherein each fuel injector is configured to directly inject fuel from the fuel rail into a respective combustion chamber within the internal combustion engine; a pressure sensing and pressure regulating unit that senses and regulates fuel pressure within the fuel rail, comprising: a housing; a pressure chamber within the housing comprising a wall configured to deflect responsive to fuel pressure within the pressure chamber, wherein the pressure chamber is in fluid communication with the fuel rail; a pressure sensing device attached to the wall within the housing, wherein the pressure sensing device is configured to generate electrical signals responsive to deflection of the pressure chamber cause by fuel pressure within the pressure chamber; and a pressure regulating device within the housing comprising a valve member that is configured to relieve fuel pressure in the pressure chamber by allowing fuel to exit from the pressure chamber to the fuel tank, wherein movement of the valve member is responsive to electrical signals generated by the pressure sensing device.