ECON-4 1.4.0 Global Guide
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changed again to maintain the RPM on Nominal value and not to cause a dip in the RPM.
Speed governor function in Idle or local load mode
ECON-4 compares the Reference and Actual speeds of the engine and calculates the Regulation error.
The Actual speed is measured from the period of the signal generated by the magnetic pickup sensing gears of
the flywheel.
Speed reference can be generated by 3 ways:
by Binary inputs,
by Analogue input
from CAN bus,
For more information see setpointSpeed request (page 49).
The Regulation error is then processed by the standard PID control structure with proportional, integration and
derivative parts. The PID setpoints – Gain, Int and Der define the quality of regulation.
The parameters of the PID control structure are different if the engine is in:
no-load operation,
loaded operation
For more information see setpoint .Description (page 53)
The output of the PID control structure is then added together with the Load anticipation feedback, which is
directly proportional to the engine power. The output from the last sum is limited by the Anti-windup Limiter
module, which reduces the integrator’s output signal so that the sum of the signals from the Gain, Integrator,
Differentiator and Load anticipation blocks equals exactly the limit MaxFuel.
Speed governor function in parallel mode
When engine is in parallel to Mains, Econ4 works just as amplifier and converts Speed request signal to Gas
Dose signal according Speed/Fuel line as follows
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