Main Data Labels For Ignition; Main Data Labels For Engine Speed Limitation - Bosch MS 6 Manual

4 | Prepare Data Base
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Main Data Labels for Ignition

Main Data Labels for ignition
Notice: Positive values stand for ignition angles before TDC, negative values after
TDC. Begin 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

Main Data Labels for Engine Speed Limitation

The rev limiter works in two steps:
▪ Soft limitation by ignition retardation or cylinder individual cutoff of injection
and/or ignition
ECU MS 6
Coil dwell time. Consult the coil manu‐
facturer for details. Most coils need
dwell times about 1.5 to 2.5 ms at 12 to
14 V. For further background informa‐
tion please refer to the Function De‐
scription IGNITION.
Cylinder individual corrections. Set to
0.0. Numbering refers to mechanical
cylinders.
Base spark advance during engine start.
Set to 5 to 10 deg, according to the re‐
quirements of the engine.
Base ignition timing in deg crankshaft
before TDC. Use modest values at the
first time. Atmospheric engines may run
safe at 20 – 25 deg in part load, turbo
engines at high boosts may demand
even less spark advance. These values
are strongly dependant on compres‐
sion ratio, fuel quality, temperature and
engine specifics. If you know you're us‐
ing "poor" fuel, run at high tempera‐
tures 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
application 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 stabi‐
lization. Set value to desired speed or
deactivate stabilization by setting
DIGN_IDLECTRL to 0.0.
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