Patent ID: 6446612
Filing Date: 2002-09-10
Classification: F02D,F02M

Abstract:
A method of 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, the method comprising the steps of providing a supply line to said inlet end of said fuel rail, providing a return line to said supply tank from said return end of said fuel rail, supplying an adequate amount of fuel to said fuel rail from a fuel injection pump through said supply line, maintaining an adequate pressure within said fuel rail by disposing a back pressure valve in said return line, returning a portion of said fuel from said injection rail through said return line to said supply tank and increasing said portion of said fuel returned from said injection rail to said supply tank.