41
The camshaft position sensor G163 is used to
monitor camshaft adjustment and to
generate a substitute signal if the G40 fails.
10 V/Div. 20 ms/Div
5 V/Div. 20 ms/Div
T
1
5 4 8 6 3 7 2
SSP217_061
The camshaft position sensor G40 is
mounted to cylinder bank 2.
The camshaft position sensor G163 is
mounted to cylinder bank 1.
Engine run-down sensor
The ME 7.1 engine management system has
an engine run-down sensor. This device
supports the quick-start function so that fuel
injection can occur before quick-start
synchronisation.
The engine control unit remains active for a
defined time after the ignition has been
switched off and, with the aid of the G28,
“monitors“ the engine as it slows to a stand-
still.
The software reference mark is the point
from which the control unit commences its
calculations to determine the ignition
point. It is about one tooth after the
hardware reference mark, which is
approximately 66˚ - 67˚ cr./shaft before
ignition TDC of the 1st cylinder.
Signal trace of engine speed sender G28, and
Hall sender G40 and G163
G163
G40
G28
Automatic mode
The position of the engine mechanics
(position of the next cylinder at ignition TDC)
is stored and is available the next time the
engine is started. The ME 7.1 can immediately
begin injection and has a fuel mixture ready,
which has a positive effect on starting
behaviour.
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