Abstract: A vehicle fuel system may employ a fuel pump module with a reservoir within a fuel tank. The system may also employ a fuel injection common rail, a fuel supply line leading from the fuel pump module reservoir to the fuel injection common rail, and a fuel return line leading from the fuel injection common rail through a fuel pump module flange. Additionally, the system may employ a first return fuel check valve to release fuel only into a reservoir jet pump and/or a transfer jet pump, while a second return fuel check valve may release fuel only directly into the fuel pump module reservoir. An electric fuel pump within the reservoir may have a fuel pump check valve and supply fuel only to the reservoir jet pump and/or the transfer jet pump, and not to an engine, when activated by a pressure sensor in the fuel return line.

Abstract: A vehicle fuel system may employ a fuel pump module with a reservoir within a fuel tank. The system may also employ a fuel injection common rail, a fuel supply line leading from the fuel pump module reservoir to the fuel injection common rail, and a fuel return line leading from the fuel injection common rail through a fuel pump module flange. Additionally, the system may employ a first return fuel check valve to release fuel only into a reservoir jet pump and/or a transfer jet pump, while a second return fuel check valve may release fuel only directly into the fuel pump module reservoir. An electric fuel pump within the reservoir may have a fuel pump check valve and supply fuel only to the reservoir jet pump and/or the transfer jet pump, and not to an engine, when activated by a pressure sensor in the fuel return line.

Abstract: A movable fuel valve lies within a housing at an end of a housing fuel passage. A fuel tube has a nozzle end inserted within a first end of the housing fuel passage while the movable valve element is situated at a second end of the housing fuel passage and controls fuel flow from the second end of the housing fuel passage. The nozzle end remains surrounded in fuel when the valve element is closed and sealed against the second end of the housing fuel passage. When the fuel pressure within the housing fuel passage is greater than a fuel pressure on the other side of the valve, the fuel flows from the housing fuel passage, through the part of the housing surrounding the valve, and into the reservoir. The movable valve element prevents fuel from flowing from the main-side of a fuel tank to the sub side of the tank.