| 摘要 |
PURPOSE:To prevent overrotation of a main engine, by a method wherein a signal from a water level detector for detecting relative positions of a ship's hull and the surface of water in proximity to a screw propeller is fed to a function generator, and the supply of a fuel to a main engine is controlled in accordance with a signal from the function generator. CONSTITUTION:The water level detector 14 detecting the relative positions of the ship's hull and the surface of water in proximity to the screw propeller supplies a water level detection signal L to the function generator 15. On receiving the signal L, the function generator 15 compares the signal L with a water level L0 at which the screw propeller starts to appear on the surface of water. When the detection signal L is smaller than the water level L0, that is, when the screw propeller is exposed above the surface of water, a load-controlling signal according to the exposure quantity is supplied from the function generator 15 to an adder-subtractor 16 provided in a governor A' in a controlling system for the main engine. The adder-subtractor 16 adds the load-controlling signal to a fuel-controlling signal fed from a rotating speed controller 8, and feeds a controlling signal for fuel injection quantity to an actuator 9. The actuator 9 receives this controlling signal, and controls a fuel injection pump 5. |
