| 摘要 |
<p>A rotor overspeed protection system (40) for a gas turbine engine (10) controls engine fuel flow to prevent an engine rotor from over-speeding. The engine fuel metering system (42) includes a fuel metering valve (46) in flow communication with a fuel shutoff valve (48) and a fuel bypass valve (50). The rotor protection system includes an overboost servovalve (60) and a solenoid valve (90) coupled to the fuel metering system and to an independent speed sensing system. In operation, servovalve can control the metered fuel flow to engine independently of the fuel metering valve to facilitate reducing rotor overspeeds and overboosts.</p> |
