초록 ▼

A control system for a fuel delivery system regulates fuel pressure on the filtered side of a fuel filter and relieves excessive primary pump flow from the unfiltered side of the filter. The valve also selectively provides warm fuel to de-wax the fuel filter after a cold start. Once wax build-up is

A control system for a fuel delivery system regulates fuel pressure on the filtered side of a fuel filter and relieves excessive primary pump flow from the unfiltered side of the filter. The valve also selectively provides warm fuel to de-wax the fuel filter after a cold start. Once wax build-up is no longer an issue, the warm fuel is directed to a fuel cooler or a heat sink, such as the fuel tank. The control system prioritizes the maintenance of filtered fuel pressure over maximizing fuel returned for cooling. Also, the fuel filter is protected from excessive fuel pressure differential.

대표청구항 ▼

[ I claim:] [1.] A fuel control system for regulating fuel in a fuel delivery system for a fuel injection system on a combustion engine, the fuel delivery system having a fuel tank, a fuel supply line, a fuel return line for returning excess fuel to the fuel tank, a fuel filter for filtering fuel fl

[ I claim:] [1.] A fuel control system for regulating fuel in a fuel delivery system for a fuel injection system on a combustion engine, the fuel delivery system having a fuel tank, a fuel supply line, a fuel return line for returning excess fuel to the fuel tank, a fuel filter for filtering fuel flowing through the supply line, with the filter thereby defining a boundary between a filtered side and an unfiltered side, and a fuel pump communicating with the fuel tank and the fuel injection system for pumping fuel from the tank, through the supply line and filter, to the engine, with said control system comprising:a pressure regulator valve adapted to communicate with the fuel supply line in a parallel relationship with the filter, with said pressure regulator valve controlling fuel supply pressure by sensing fuel pressure on the filtered side of the filter and relieving excess fuel from the unfiltered side of the filter; anda diverter valve communicating with said pressure regulator and being responsive to fuel temperature, with said diverter valve being adapted to communicate between the fuel supply line and the fuel return line, with said diverter valve selectively diverting return fuel flow to the fuel supply line or fuel return line based on fuel temperature, with said pressure regulator valve overriding said selective diverting performed by said diverter valve based on the fuel pressure in the fuel supply line on the filtered side of the filter.