Apparatus and method for setting pressure in a fuel delivery system

A method for maintaining fuel pressure in a fuel delivery system of a vehicle having an engine during engine shut down periods, comprising:

• disposing a fuel delivery system within a fuel reservoir of a vehicle, the fuel delivery system, comprising:
• a pump being configured to provide fuel to the engine;
• a fluid pathway being in fluid communication with an outlet port of said pump at one end;
• a regulator being disposed in said fluid pathway, said regulator regulating pressure of the fuel when said pump is pumping fuel into said fluid pathway;
• and a combination valve being disposed in said fluid pathway, said regulator being located between said combination valve and said outlet port of said pump, wherein said combination valve provides a check valve configured to allow fuel flow in a first direction and a system pressure relief valve configured to allow fuel flow in a second direction, said first direction being opposite to said second direction and said first direction being the same direction fuel is pumped in said fluid pathway by said pump;
• wherein said system pressure relief valve is configured to open when fuel in said fluid pathway exceeds a predetermined value when the engine of the vehicle is not running.

A fuel delivery system for a vehicle having an engine, comprising:

• a pump being configured to provide fuel to the engine;
• a fluid pathway being in fluid communication with an outlet port of said pump at one end;
• a regulator being disposed in said fluid pathway, said regulator regulating pressure of the fuel when said pump is pumping fuel into said fluid pathway;
• and
• a combination valve being disposed in said fluid pathway, said regulator being located between said combination valve and said outlet port of said pump, wherein said combination valve provides a check valve configured to allow fuel flow in a first direction, a system pressure relief valve configured to allow fuel flow in a second direction, and a pump pressure relief valve configured to allow fuel flow in said first direction, said first direction being opposite to said second direction and said first direction being the same direction fuel is pumped in said fluid pathway by said pump, wherein said pump pressure relief valve is configured to open at a pressure value higher than the pressure required to open said check valve.