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Updated Ion Sense Info

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OrchardPerformance 2021-02-15 13:36:32 +00:00
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Ion-Sense.md
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At the moment rusEFI does NOT have any working ion sense hardware or firmware.
### January 2021 update
Early versions of our own DIY hardware has been tested on an engine with in-cylinder pressure sensing.
The data from this has been analysed and we have had some promising results.
Our board has been able to produce a strong corelation for the angle of peak cylinder pressure and the signal processing method has been passed to MK for creation of the code.
While we have had success with the peak pressure the current version of the board is unable to produce the flame progression or the MFB50 angle at this time, we feel that this may be possible to correct with further signal processing or improved hardware.
The DIY hardware is undergoing a revision to provide better protection from ground loops as at present there is a risk of damage to the ECU should the secondary voltage make it back to the ECU.
Further information will become available as things progress, for now the graph below shows the corelation of the angle ATDC of the Ion sensed pressure peak (IC) vs the pressure sensor sensed peak pressure (PC).
![](Images/Ion-Angle-Graph.png)
Orchardperformance has some proto hardware he has not yet assembled which might help with signal acquisition. Link TBD.
We like
@ -8,7 +20,7 @@ We like
*Mazda skyactiv COP 2016-on
*mini r50 coil pack
*mini r50 coil pack (for use with DIY board)
*BMW M5 v-10 COP usable for ion sense. M5 coils, Bremi PN/20631 bmw 12 13 7 835 108
@ -17,7 +29,7 @@ Q: Is Saab/Mazda smart coil unusual in any way?
A: the problem with many smart coils is that you can't apply a voltage/sense current on the primary since it's grounded internally. The mazda/Saab coils have the voltage generation internally.
The three pins on bmw are just both sides of the primary, and one side of the secondary (other side on the plug ofc)
Theyre a normal dumb coil
They are a normal dumb coil
All the magic is in the box
The mazda/Saab coils have the voltage generation internally
They have gnd/12v/trigger/sense
@ -35,5 +47,3 @@ AndreiKA latest---
https://rusefi.com/forum/viewtopic.php?p=34988#p34988 https://rusefi.com/forum/viewtopic.php?p=35035#p35035
Simon latest--- Hooked up the Ion board to the R50 coil, connected the lot to a test MRE and will attempt to run a spark with the ion board connected and check the voltages produced, might try to scope the ion output to see if we get some kind of output.
If I need to I will play a flame over the plug while sparking to have something to pass the ions.