Knocker sensors

[Roger Heflin]

On Thu, 3 Jun 1999, Bill Edgeworth wrote:

> Thanks for the info Peter,
> This is a concern for me as I am still thinking about the roller after
> reading an article where on an engine with less breathing ability than
> mine it picked up 4/10ths over a 509
> and for the price of a good 3 bolt timing set I might as well buy a gear
> set.
> 
> Where could I find some info on this signal conditioner? Some people
> resopnded saying that it is taken care of in the software????? I would
> think that using a HC11 for signal processing would take up way to much
> processor time.
> 
> Regards,
> 
> Bill
> 
> Move
> Over
> Profesionals
> Racing

As far as the diagrams go from the HELM manuals I have, the ESC module
(on GM's) appears to do the signal conditioning.  If it detects enough
energy in the right areas it pulls a output high and the computer
interpretes this as knock.   Now there probably could be some
improvement in the ESC module that would make it more correctly detect
knock.

And how the computer respondes when it gets knock is taken care of in
software, ie max retard and how fast it retarts, and how fast it
recovers.

			Roger