Patent ID: 8333177

Claim:
A motor vehicle comprising: a fuel-consuming engine for propelling the vehicle; and a fuel system for fueling the engine; wherein the fuel system comprises a first fuel tank and a second fuel tank, each for holding liquid fuel for the engine, a pump for pumping fuel from the first and second fuel tanks to the engine, a first valve through which the pump can draw fuel from the first and second fuel tanks and pump the drawn fuel to the engine and which comprises a mechanism which is selectively operable to a first fuel-draw position that allows the pump to draw fuel concurrently from both the first fuel tank and the second fuel tank and pump fuel drawn from both the first fuel tank and the second fuel tank to the engine, a second fuel-draw position that allows the pump to draw fuel from the first fuel tank, but not from the second fuel tank, and pump fuel drawn from only the first fuel tank to the engine, and a third fuel-draw position that allows the pump to draw fuel from the second fuel tank, but not from the first fuel tank, and pump fuel drawn from only the second fuel tank to the engine, and a second valve through which fuel returns from the engine to the first and second fuel tanks and which comprises a mechanism which is selectively operable to a first fuel-return position that allows fuel to return from the engine concurrently to both the first fuel tank and the second fuel tank, a second fuel-return position that allows fuel to return from the engine to the first fuel tank, but not to the second fuel tank, and a third fuel-return position that allows fuel to return from the engine to the second fuel tank, but not to the first fuel tank; and a first actuator for selectively operating the mechanism of the first valve to its respective fuel-draw positions and a second actuator for selectively operating the mechanism of the second valve to its respective fuel-return positions, each actuator being operable independently of the other.