6.6.2 Engine Speed and Power Regulation
The desired propeller speed set point is calculated depending on the power lever sensor position. The
current engine speed is used to compute the deviation of the actual propeller speed from the set point.
The deviation is converted into an output ratio for the set point actuator. The propeller speed set point
is set by an electric motor (actuator) in the governor system. This electric motor substitutes the
conventionally used Bowden Cable.
The governor itself controls the propeller speed via the propeller blade pitch angle adjustment. The
actuator control ensures together with the monitoring a safe and correct actuation.
If the set point is reached the actuator is deactivated (hysteresis provided).
The requested engine torque is calculated depending on the power lever position and the engine-speed.
– Depending on the requested torque the resulting injection quantity (fuel mass) is calculated.
– Depending on the calculated injection quantity the required boost pressure (air mass) is
calculated.
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