Main Data Labels For Cutoff Pattern - Bosch MS 6 Manual

4 | Prepare Data Base
4.1.10
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Main Data Labels for Cutoff Pattern

Cutoff Pattern
MP_COPATTERN
CUTOFF_APP
CWCUTOFF_APP
ECU MS 6
Defines the appropriate cylinders for
torque reduction by cylinder cutoff.
At the beginning of an intervention the
next possible cylinder for starting the
cutoff pattern is determined. Based on
this info the actual pattern is taken out
of the map.
Pattern should be defined in view of
minimized oscillations of the crank‐
shaft.
Usually a regular distribution of firing
and non‐firing cylinders leads to the
best result. However, investigations of
the individual engine are recommenda‐
ble.
For it, cutoff pattern can be also turned
on manually via CUTOFF_APP and
CWCUTOFF_APP
Example: 4‐cylinder engine
Start Cyl./Cutoff stage 1 2 3 4
1 1 (=0001b) 2 (=0010b) 4 (=0100b) 8
(=1000b)
2 9 (=1001b) 6 (=0110b) 6 (=0110b) 9
(=1001b)
3 11 (=1011b) 14 (=1110b) 7 (=0111b)
13 (=1101b)
4 15 (=1111b) 15 (=1111b) 15 (=1111b)
15 (=1111b)
The cylinders are assigned bitwise, the
lowest bit represents cylinder 1.
Numbering refers to mechanical cylin‐
ders, e.g. pattern = 9: Mechanical cylin‐
ders 1 and 4 are fade out.
Cutoff pattern for test purposes. Bit
representation as described at
MP_COPATTERN
Codeword for type of intervention dur‐
ing test cutoff:
Set:
1 = injection cutoff
2 = ignition cutoff
3 = injection and ignition cutoff.
Bosch Motorsport