Control block
In all engines, ignition control is combined with injection control. Therefore, there is a common electronic control unit. Here is a small description of the function of the control unit:
The left figure shows the ignition characteristic of a conventional ignition system. On the right you can see that the characteristics of the Motronic and Simtec ignition systems are much more pronounced. Those. the ignition timing is adapted to each operating state much more precisely.
Vectra ignition systems do not require any additional equipment to set the ignition timing. All possible engine data and characteristics are at the disposal of the engine. This is ensured by an inductive encoder, a coolant temperature sensor, a throttle valve potentiometer, etc. Based on all this data, the control unit calculates the correct ignition timing for each load condition.
If you depict the ignition angle (ignition timing) depending on the load on the engine and the speed, the so-called ignition characteristic can be obtained.
Further, at the disposal of the control unit there are programs for correcting the start of the engine, the operation of a cold engine, the forced idle mode, etc.
The control unit supplies the ignition coil with only as much current as it needs at the moment. In an extreme case (ignition on, engine not running), with this ignition system, the ignition coil will not be damaged even after a long time.
Of course, there is an exchange of data with injection. Also because in the engine several sensors have a dual function.
Finally, a fault memory is installed, which, as described in the chapters on injection, can be read by a special tool offered in the workshop.
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