| 摘要 |
A fuel control system ( 10 ) in a turbine engine includes a centrifugal boost pump ( 20 ) that receives fuel from a fuel tank and increases the pressure of the fuel. A piston pump ( 40 ) boosts the fuel pressure to levels required by the turbine engine and meters an amount of fuel delivered to the turbine engine. A speed controlled electric motor ( 30 ) drives the piston pump ( 40 ). The electric motor ( 30 ) is driven by an electronic speed control wherein by controlling motor speed, fuel flow to the turbine engine is controlled, and fuel flow is directly proportional to the speed of the motor ( 30 ). Accordingly, the system ( 10 ) seeks precision of fuel control that can be achieved with an accuracy of better than +/-3% over a 30:1 fuel flow range.
|
