| 摘要 |
PROBLEM TO BE SOLVED: To prevent freezing of water mixed in fuel by controlling the temperature of the fluid flowing in an actuator at high fuel flow demand and drastically reduce heat generation at low fuel flow demand. SOLUTION: Fuel is supplied to a main pump 48 and an actuator pump 50, and among the fuel flow flowing from the actuator pump 50, a portion exceeding the volume required for the actuator 60 flows to a pressure valve 58 and a thermal valve 54. The fuel flow is divided into an inlet of the actuator pump 50 and a main pump discharge side flow path by the thermal valve 54. When the fuel is near a freezing point of water, the fuel is re-circulated to the actuator pump inlet 62 by the thermal valve 54, so as to increase the temperature of the fuel in the actuator fuel flow path. COPYRIGHT: (C)2003,JPO
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