Fuel delivery system with outlet pressure regulation

A fuel module assembly for immersion in a fuel tank to deliver fuel under pressure from the talk to an engine comprising:

• a fuel pump having an inlet and an outlet,
• means operatively connecting said pump inlet to receive fuel from a surrounding tank,
• fuel filter means having an inlet and an outlet,
• means for connecting said inlet of said filter means to said pump outlet and a check valve for connecting said outlet of said filter means to the engine,
• fuel pressure regulating means having a flow inlet connected to said pump outlet, a reference inlet connected to said outlet of said filter means downstream of said check valve, and a flow outlet for returning fuel to the tank, and means for interconnecting said flow inlet and said flow outlet when pressure at said reference inlet . exceeds a preselected threshold, and
• frame means mounting said pump, filter means, pressure regulating means and said connecting means as a integral assembly adapted for immersion in the fuel tank.

A fuel delivery system for an internal combustion engine that includes:

• a fuel supply, and a fuel pump having an inlet for drawing fuel from said supply and an outlet,
• a fuel filter connected to said pump outlet and means for connecting said filter to the engine such that fuel delivered to the engine by said pump flows through said filter,
• pressure regulating means having a first input connected to said pump outlet and a second input connected to said filter, and having an outlet for returning fuel to said supply bypassing said filter as a function of fuel pressure at said filter so as to maintain substantially constant fuel pressure delivery to the engine, and
• a check valve positioned between said filter means and the engine for preventing reverse flow of fuel from the engine to said supply when said pump is turned off, said second input of said regulating means being connected to said filter downstream of said check valve.