PRODUCT INFORMATION
INDEX
DATE
Dep. 2
IO-G-M-33-010e
June 2013
INSTALLATION AND OPERATION MANUAL - GIS IGNITION UNIT
DISPLAY
7/14
Fig. 8 – Ignition timing display menu
The following parameters are related to the global timing of the engine:
-
Base Timing
: Shows the base ignition timing programmed in the unit. The value for this parameter is set
to 21° in all
KOHLER
engines. This base timing is corrected in "Timing correction" depending on the
engine balance
-
Potentiometer Timing
: Displays the correction applied by the potentiometers in the unit. The value for this
parameter is always set to 0 in
KOHLER
engines as potentiometers are not used.
-
Analogue Current Input Timing
: Displays the correction applied by 4-20 mA signal from the Detcon.
-
Analogue Voltage Input Timing:
Displays the correction applied by an analogue voltage signal. The value
for this parameter is always set to 0 in
KOHLER
engines as no analogue voltage signal is used to
adjust the advance.
-
Speed Curve Correction
: Displays the correction applied based on the engine speed.
-
Timing Correction
: Displays the external correction the unit receives via communications (CAN, Modbus).
This timing correction can come from several devices:
o
From the display itself
o
From the PLC that controls the engine
o
From the ECU
NOTE
Depending on the engine balance, the required timing advance is entered via the display. Therefore, the timing
correction value is always different to 0. (It is only set to 0 for disengaged engines with an advance of 21).
-
Global Timing:
Displays the currently set global timing which all cylinders are running on. This value is the
result of the sum of all the above parameters.
The following parameters relate to the individual timings for each cylinder. There may be cylinders that are
not working with the global timing because some kind of cylinder-specific individual correction is being
applied:
-
Minimum Relative Firing Angle:
This is the lowest of the individual timings (the most retarded) of all
engine cylinders.
-
Maximum Relative Firing Angle:
This is the largest of the individual timings (the most advanced) of all
engine cylinders.
-
Average Relative Firing Angle:
Displays the average value of the different cylinder-specific advances in
the engine. This value does not have to coincide with the
Global Timing.
4.1.31
O&M_2.002211.810_A_10_2016
