Detonation sensors

[John Hess]

Basically, they are microphones connected to the block.  A Knock 
produces a sharp sound that the "Knock" sensor "hears" and it sends a 
short pulse to the ECU.


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From:  gagner[SMTP:gagner at mcs.com]
Sent:  Tuesday, March 04, 1997 10:00 AM
To:  diy_efi at coulomb.eng.ohio-state.edu
Subject:  Re: Detonation sensors

Can anyone explain the operation of the detonation sensors used to
automatically retard spark.

Thanks.

Mark Gagner
gagner at mcs.com