Bosch MS 6 Manual page 37

4.1.9 Main Data Labels for Ignition
4.1.10 Main Data Labels for Engine Speed Limitation
Bosch Motorsport
Main Data Labels for ignition
Notice: Positive values stand for ignition angles before TDC, negative values after TDC. Be-
gin with moderate values to protect your engine from damages.
MP_TDWELL
DIGN_CYL1-...12
MP_IGN_START/DIGN_ST_TINT
MP_IGN(2/3)
MP_DIGN_TEMP/MP_DIGN_TEMPW
DIGN_APPL
IGN_IDLE_STAT
NIDLE_NOM / DIGN_IDLECTRL
The rev limiter works in two steps:
– Soft limitation by ignition retardation or cylinder individual cutoff of injection and/or
ignition
– Hard limitation by injection cut off and/or ignition cutoff of all cylinders
To achieve a good dynamic behavior by advanced intervention, the engine speed is pre-
dicted by means of the speed gradient.
Engine_Control_Unit_MS_6.x_Manual
Coil dwell time. Consult the coil manufacturer
for details. Most coils need dwell times about
1.5 to 2.5 ms at 12 to 14 V. For further back-
ground information please refer to the Function
Description IGNITION.
Cylinder individual corrections. Set to 0.0. Num-
bering refers to mechanical cylinders.
Base spark advance during engine start. Set to 5
to 10 deg, according to the requirements of the
engine.
Base ignition timing in deg crankshaft before
TDC. Use modest values at the first time. Atmo-
spheric engines may run safe at 20 to 25 deg in
part load, turbo engines at high boosts may de-
mand even less spark advance. These values are
strongly dependant on compression ratio, fuel
quality, temperature and engine specifics. If you
know you're using "poor" fuel, run at high tem-
peratures or your engine is very sensitive on
spark advance, go to the safe side.
Ignition angle temperature dependent
Delta value for spark advance, use for applica-
tion work. Start at 0.0 for first startup.
Ignition timing during idle. 10 deg are suitable
for most applications
Desired engine idle speed for idle stabilization.
Set value to desired speed or deactivate stabiliz-
ation by setting DIGN_IDLECTRL to 0.0.
Prepare Data Base | 4
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