摘要 |
A fuel circuit (58) for a fuel system including a fuel reservoir (14), a fuel injection pump (16), a fuel lift pump (22), and a fuel filter assembly (20). The fuel circuit includes a fuel passageway (66) for recirculating the excess fuel flow from an outlet of the fuel injection pump to the inlet of the fuel injection pump. The excess fuel flow, which is pressurized by the fuel injection pump, is preferentially utilized as the fuel source over fuel in the fuel reservoir, which is at a lower pressure The fuel circuit may include a single fuel-to-air heat exchanger or a fuel-to-coolant heat exchanger (60) and a coolant-to-air heat exchanger (62) to remove heat from the excess fuel flow, depending on the amount of heat generated by the fuel injection system and the fuel lift pump and the expected ambient temperature conditions. Circulation pumps (64,68) in the fuel passageway (66) and the coolant line (70) may be used to facilitate removal of heat in the two heat exchanger system. <IMAGE> |