Pressure-responsive fuel delivery system

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

• a fuel supply including a fuel pump responsive to application of electrical power for supplying fuel under pressure,
• fuel delivery means on said engine,
• a fuel line having one end connected to an outlet of said pump and a second end terminating at said fuel delivery means, said fuel line forming the sole interconnection between said fuel supply and said fuel delivery means,
• means for applying electrical power to said pump, including a sensor coupled to said line between said check valve and said fuel delivery means for providing an electrical signal as a function of fuel pressure in said line and means for applying electrical power to said pump as a function of said signal,
• a check valve in said fuel line for preventing reverse flow of fuel from said fuel delivery means and said pump, and
• a pressure relief valve connected to said fuel line between said check valve and said fuel delivery means, said pressure relief valve being responsive to over-pressure in said fuel line to return fuel from said line to said supply.

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

• a fuel supply including a fuel pump responsive to application of electrical power for supplying fuel under pressure,
• fuel delivery means on said engine,
• a fuel line having one end connected to an outlet of said pump and a second end terminating at said fuel delivery means, said fuel line forming the sole interconnection between said fuel supply and said fuel delivery means,
• means for applying electrical power to said pump, including a sensor for providing an electrical signal as a function of fuel pressure in said line and means for applying electrical power to said pump as a function of said signal,
• a check valve in said fuel line for preventing reverse flow of fuel from said fuel delivery means and said pump,
• a pressure relief valve connected to said fuel line between said check valve and said fuel delivery means, said pressure relief valve being responsive to over-pressure in said fuel line to return fuel from said line to said supply, and
• a housing having a fuel passage extending therethrough, said sensor being mounted within said housing and communicating with said passage so as to be responsive to pressure of fuel in said passage, said pressure relief valve being mounted in said housing having a first end communicating within said passage, means at a second end of said passage for feeding fuel to said engine, and means at a second end of said pressure relief valve for returning fuel from said passage to said supply.

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

• a fuel supply including a fuel pump responsive to application of electrical power for supplying fuel under pressure,
• fuel delivery means on said engine,
• a fuel line having one end connected to an outlet of said pump and a second end terminating at said fuel delivery means, said fuel line forming the sole interconnection between said fuel supply and said fuel delivery means,
• means for applying electrical power to said pump,
• a check valve in said fuel line for preventing reverse flow of fuel from said fuel delivery means and said pump, and
• a pressure relief valve connected to said fuel line between said check valve and said fuel delivery means, said pressure relief valve being normally closed for blocking flow of fluid therethrough and being responsive to pressure in said fuel line above a preselected threshold to open and return fuel from said line to said supply, said power-applying means comprising a sensor for providing an electrical pressure signal as a function of fuel pressure in said line, and means for applying electrical power to said pump as a function of said pressure signal.