| 摘要 |
<p>A fuel control system for a gas turbine engine including a main metering valve (15) for controlling fuel flow to a line (18) which in use supplies fuel to a burner manifold (19) of a gas turbine engine, said line including an overthrust valve (21) downstream of the main metering valve, said overthrust valve being movable, by the application thereto of pressurised fluid, from an open position towards a closed position to reduce the flow of fuel from the main metering valve (15) to the burner manifold (19) in use, the system having a pair of parallel paths (31, 32) through which in use said pressurised fluid is supplied to the overthrust valve (21), the first (31) of said paths being closed so as to become ineffective when the overthrust valve reaches a predetermined point in its movement towards closure, and the second (32) of said paths including a flow restrictor (33) controlling the rate at which the overthrust valve is moved from said predetermined point towards its closed position. <IMAGE></p> |
