Rev. 01/2015 99
Speed Curve
Example of a typical speed curve for an engine in generator mode, for which
the speed curve is intended to positively impact the start performance of
the engine:
If the engine is not running, the timing is equivalent to the potentiometer
setting, as in example 20° BTDC. When the engine is started, the ignition
timing is reduced by 10° and above 50 revolutions it increases again, until it
reaches the specified final value at 1000 revolutions.
Timing
BTDC
Potentiometer
adjustment
rpm
To define the speed curve, the following values are set in parameterization:
Number of speed points
# SPEED POINTS: 3
Definition of the three speed points
BP1 NEW SPEED 0 No ignition timing adjustment
NEW ANGLE 0 ADV
BP2 NEW SPEED 50 Ignition timing adjustment
by 10° retard
NEW ANGLE 10 RET
BP3 NEW SPEED 1000 No ignition timing adjustment
NEW ANGLE 0 ADV
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