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knock-sensing.md
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# Knock Sensing
TL,DR: We have native knock processing, with [Proteus](Proteus) and Hellen hardware support at the moment. We have very limited amount of testing on real vehicles: we know that knock is being detected, we know timing is being retarded, we do not have the body of best practices yet. See bits and pieces on the forum!
TL,DR: We have native knock processing!
Reference tune https://rusefi.com/online/view.php?msq=1626 reference tune https://rusefi.com/online/view.php?log=1359
## Software knock sensing
![x](https://rusefi.com/forum/download/file.php?id=6900)
## Spectogram
Knock spectrogram is displayed by [TS-Plugin](TS-Plugin)
[Youtube rusEFI: knock on standing Miata, Proteus](https://youtu.be/GOWEKU2SH9I)
[Youtube rusEFI: Hellen knock gauge](https://youtu.be/oJKI8X4oxCs)
## ASIC solution
We have some progress integrating with conventional knock sensors but it's not ready for end users.
We use TPIC/HIP9011 IC for knock sensor integration but no conclusive data.
We believe that we have hip9011 hardware yet nobody has ever actually detected knock with a hip9011,
someone would have to figure our calibration approach and test the overall implementation.
Frankenso has hip9011 on-board
TODO AndreiKA?
TODO MattK
Frequency is calculated based on bore, Freq = (900 / (PIF * (bore) / 2))
We also have some results with ion sensing but it's not ready for end users
[rusEFI ion sensing](Saab-Trionic-8-Combustion-Detection-Module-on-Mazda-Miata-running-rusEFI)