Back pressure valve for fuel injection system
OwnerJames Dwayne Hankins, Roy M. Woodinventors
Life of this patent
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Abstract
A method and apparatus to increase the fuel economy of a diesel engine having an injection system fuel rail by increasing the flow rate of fuel being returned to the tank hence decreasing the temperature of the fuel returned to the tank from the fuel rail while maintaining a given pressure at the fuel rail.
Claims18
A back pressure valve for decreasing the temperature of fuel returned to the supply tank from a fuel injection rail of an internal combustion engine injection system, said fuel injection rail having an inlet end, a return end and a plurality of cylinder injection nozzles between said inlet end and said return end, said injection nozzles receiving fuel from said common fuel injection rail, said injection system also comprising a supply line to said inlet end of said fuel rail, a fuel injection pump supplying an adequate amount of fuel to said fuel rail through said supply line, a return line to said supply tank from said return end of said fuel rail for returning a portion of said fuel from said injection rail through said return line to said supply tank, said back pressure valve having increased flow through at least the inlet port thereof thereby increasing said portion of said fuel returned from said injection rail to said supply tank.
A back pressure valve for increasing the fuel economy of an internal combustion engine having an fuel injection rail, said fuel injection rail having an inlet end, a return end and a plurality of cylinder injection nozzles between said inlet end and said return end, said injection nozzles receiving fuel from said common fuel injection rail, said injection system also comprising a supply line to said inlet end of said fuel rail, a fuel injection pump supplying an adequate amount of fuel to said fuel rail through said supply line, a return line to said supply tank from said return end of said fuel rail for returning a portion of said fuel from said injection rail through said return line to said supply tank, said back pressure valve having increased flow through at least the inlet port thereof thereby decreasing the temperature of fuel returned to said supply tank from said fuel injection rail by increasing said portion of said fuel returned from said injection rail to said supply tank.
A back pressure valve for increasing the fuel economy of an internal combustion engine having an fuel injection rail, said fuel injection rail having an inlet end, a return end and a plurality of cylinder injection nozzles between said inlet end and said return end, said injection nozzles receiving fuel from said common fuel injection rail, said injection system also comprising a supply line to said inlet end of said fuel rail, a fuel injection pump supplying an adequate amount of fuel to said fuel rail through said supply line, a return line to said supply tank from said return end of said fuel rail for returning a portion of said fuel from said injection rail through said return line to said supply tank, said back pressure valve having increased flow through at least the inlet port thereof thereby increasing said portion of said fuel returned from said injection rail to said supply tank and decreasing the amount of fuel aeration at each injector disposed on said fuel rail successive to a first injector disposed on said fuel rail by increasing the mass flow rate of fuel through said fuel rail.
Dependencies are inferred from the claim text.