23.10
Ignition system
23.10.1 General
The ignition system for each cylinder consists of an ignition module,
an ignition coil, a high tension extender and a spark plug. Ignition
control is calculated and performed by the CCU, see Fig 23-17. The
ignition module is described in section 23.10.3. The teflon insulated
high tension extender has a 5 k
resistor installed in order to reduce
the interference generated by the spark.
Ignition system layout
23.10.2 Ignition control
The reference for ignition timing and the dwell time duration and a
separate offset adjustment in timing and duration for each cylinder is
determined in the MCU. The ignition timing and dwell time duration
changes with engine load.
The ignition timing is defined in degrees with an resolution of 1/10
and the dwell time is defined in
s. These parameters are transmitted
to each CCU over the CAN bus. The ignition timing value is the point
1. Ignition coil
2. Spark plug extension
3. Spark plug
4. CCU
5. Ignition module
1
2
3
4
5
Fig 23-17
3223049701
34SG-200408-01
WECS 3000