Normal waveform only for engine (M, S, W) BMW
12 13 …
1. Getting the maximum breakdown voltage
2. The height of the ignition voltage amplitude
3. The height of the voltage amplitude on the electrodes of the spark
4. The duration of the spark discharge
5. Curve voltage on the electrodes of the spark
6. Start the process of damping of oscillations
Images of the processes in the secondary circuit of the ignition system located in the cylinder on the work order of sequence:
Analysis of maximum values of the breakdown voltage at the speed of the crankshaft at idle (for example, 4-cylinder engine).
Display the maximum value of the breakdown voltage of approx. 20-25% lower than the actual value.
The uniformity of the amplitudes of all the cylinders is more important parameter than the height of the maximum amplitude of the breakdown voltage. Valid differences between 3000 and 4000 V.
A more significant difference, see.
“Other Paintings fault with fault analysis”.
Analysis of maximum values of the breakdown voltage at high speed for approx. 2000 rev / min (for example, 4 cylinder engine).
Images of the processes of the ignition system in the secondary circuit located one above the other:
The analysis of the curve of voltage on the electrodes of a spark plug and decay processes in idle mode (for example, 4-cylinder engine).
Image processes in the ignition system secondary circuit arranged one above the other
using this type of images you can only be determined in large differences oscillograms processes in the secondary circuit of the ignition system.
Discovered the problem is related to the corresponding cylinder using a form submission waveform voltage in the secondary winding “next to each other / one above the other.”