| 摘要 |
<p>A fuel-control manifold (20) has a non-integral body (22) with at least three pieces joined together. The fuel-control manifold (20) has a tank port (40), an engine supply port (42), a fueling port (44), and a shutoff valve (52), all in the upper body segment (24). The shutoff valve (52) includes a controllable shutoff valve closure (54) having a shutoff-valve first side (56) in fluid flow communication with the tank port (40) and a shutoff-valve second side (58) in fluid flow communication with the engine supply port (42) and with the fueling port (44). There are a defueling port (70) in a lower body segment (28), a vent port (72) in the upper body segment (24), and a defuel/vent valve (74) in a middle body segment (26). The defuel/vent valve (74) includes a controllable ball-valve defueling closure (92) having a defueling-valve first side (78) in fluid-flow communication with the shutoff-valve second side (58) and a defueling-valve second side (80) in fluid-flow communication with the defueling port (70), and a controllable ball-valve vent closure (98) having a vent-valve first side (84) in fluid-flow communication with the vent port (72), and a vent-valve second side (86) in fluid-flow communication with the defueling-valve second side (80). The defueling closure (92) and the vent closure (98) are mounted on a common detuel/vent valve stem (88), and the defueling closure (92) and the vent closure (98) cannot be open at the same time.</p> |
