Knock sensor interface

[Seth]

Bernd-

I have a book whritten by some VW researchers talking about "advanced
technologies". The book is about 10 years old, but it has some info in
it specific to the knock sensor on the 1.8 liter VW engines. I'll try to
find it and see if it talks about frequencies. I am wondering if there
might be a way to reverse engineer a knock sensing VW ECU?  You could
probably get one in a wrecking yard.  In the US they run $25 to $50.  If
nothing else it might help decide on what ICs to use.

-Seth 

Bernd Felsche wrote:
> 
> As part of the data-acquisition system I'm designing, I need to
> interface to the knock sensor.
> 
> Having browsed the diy_efi web site and found the Intersil HIP9010,
> I downloaded and read the data sheet and AN9770 application note.
> 
> Comparatively-speaking; I'm none the wiser. :-(
> 
> How do I determine the significant background and knock sensor
> frequency bandwidths?
> 
> Should I just "suck it and see" based on "guesstimates"?
> 
> Any pointers to relevant resources would be welcome.
> 
> --
> Real Name: Bernd Felsche
>     Email: nospam.bernie at perth.DIALix.com.au
>         http://www.perth.dialix.com.au/~bernie - Private HP
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