knock sensor question

[drew@dyermaker.cs.uoguelph.ca (drew)]

The knock sensor is a piezo electric microphone that is tuned to be
sensitive the frequenicies produced by piston knock.

Drew

On Thu, 21 Nov 2002, Chris Boggs wrote:

> Does anybody know how the knock sensor works?  Is it just an
> accelerometer set to a characteristic knock frequency?  Because I was
> thinking of making a type of home made data acquisition system for my
> VW. It would be interesting to see under what conditions predetonation
> would occur.  As well other types of engine things. And would probably
> help in fine tunning. 
>  
> Chris
> 87 16v
> 
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Drew MacPherson - '84 Wolfsburg Edition Scirocco TurboDiesel