RPM display of automotive Quick Measure in Waveforms

[TOIVI]

On the attached picture, the Math1 channel displays the secondary ignition waveform of a V8 engine, with the automotive quick measure "Cylinders".  (Math1 = -1*C1. The trigger source is cylinder 1, on the C2 channel.)
In a four-stroke engine, two crankshaft revolutions are required to ignite all of the  cylinders, so the displayed RPM (340.8) is the half of the real engine speed.

[attila]

Hi @TOIVI

Adding 'RPM multiplier' option.

[TOIVI]

Hi @attila

This is a generic solution, but it can be misleading. The attached table summarizes the situation. A 2 Stroke / 4 Stroke switch would be a better option.

[attila]

Hi @TOIVI

And what about 3 and other stroke numbers ?

[TOIVI]

Hí @attila

Yes, I was thinking about the Wankel engine, but I didn't want to complicate the table.

Practically, these are the variants.

[attila]

Hi @TOIVI

 

[TOIVI]

Thank You @attila

I went through all combinations, the RPM value is correct.
Just a note. This "Cycles" overlay is very useful for four-stroke engines. But in a two-stroke engine, there are no separate, consecutive Intake -> Compression -> Expansion -> Exhaust cycles.
The two strokes can be divided into three cycles: Expansion -> Exhaust&Intake -> Compression.

 

[attila]

Hi @TOIVI

Thank you.

 

[TOIVI]

Thank You @attila