Kohler Decision-Maker 1 Manual page 205

28. Set Speed B Min. (load share model only).
Enter the value from the Governor Parameter
Summary.
Use Set Speed B minimum to set the lowest value
allowed for adjustments of Set Speed A.
29. Set Speed B Max. (load share model only).
Enter the value from the Governor Parameter
Summary.
Use Set Speed B maximum to set the highest
value allowed for adjustments of Set Speed A.
30. Idle Speed Min.
Governor Parameter Summary.
The Idle Speed minimum value is the lowest value
allowed for adjustments of Idle Speed.
31. Idle Speed Max.
Governor Parameter Summary.
The Idle Speed maximum value is the lowest
value allowed for adjustments of Idle Speed.
32. Duty Cycle Limit.
Governor Parameter Summary.
The duty cycle maximum value sets the absolute
maximum amount of drive signal to the actuator
and serves as a mechanism for fuel limiting. Fuel
limiting is achieved by setting the maximum duty-
cycle or ontime allowed during one cycle of the
pulse width modulation (PWM) signal controlling
the actuator drive circuit.
33. Startup Speed. Use the default value.
The Startup Speed value allows the governor to
determine whether the engine is cranking or
running whenever an engine speed signal is
present.
TP-6356 4/12
Enter the value from the
Enter the value from the
Enter the value from the
The Startup Speed value should be at least 10%
higher that the fastest engine cranking speed but
lower than the engine's Idle Speed.
If the Startup Speed is too low (less than crank
speed) the governor's target speed is ramped to
the active Set Speed (Idle, Set Speed A or B)
before the engine has started. When the engine
does not start, it may overspeed or output
excessive smoke because the startup ramp,
having already completed, no longer controls the
rate of engine speed increase.
If the Startup Speed is too high (above the active
set speed) then the Startup Speed becomes the
target speed that the governor must reach before
the governor considers the startup sequence
complete. Typically, the startup sequence ends
when the engine speed reaches the active set
speed. The active set speed is the Idle Speed if
the Idle Hold Time parameter is a nonzero value or
the selected set speed (either Set Speed A or B).
34. Startup Duty Cycle. Enter the value from the
Governor Parameter Summary.
The Startup Duty Cycle value is used to preload
the PID values with a PWM duty cycle value that
provides an actuator output signal sufficient to
allow enough fuel to idle the engine.
If the Startup Duty Cycle value is too low, the
engine crank time may be longer than desired
because the governor's actuator output starts
from a value much smaller than needed to begin
opening the fuel valve.
If the Startup Duty Cycle value is too high, the
engine may overspeed because the actuator
opens more that needed to start the engine.
Section 10 Governor Adjustments 205