[Diy_efi] Spark knock detection

[Marteney, Steve]

Perhaps this is too simple, but GM TPI V8s mount them in the block drain
plug.  There's a case of a block never designed to have a knock sensor, they
just designed the knock sensor to fit in an existing hole.

Steve

-----Original Message-----
From: steve ravet [mailto:sravet at arm.com]
Sent: Thursday, September 12, 2002 12:34 PM
To: diy_efi at diy-efi.org
Subject: Re: [Diy_efi] Spark knock detection




Keith Ballantyne wrote:
> 
> How hard is it to actually mount a knock sensor to an engine that has
> never had such equipment?  I always thought they needed to be mounted in
> the head somewhere.
> 
> Keith Ballantyne

Look in the archives (diy and gmecm), there's a lot about GM knock
detection  The knock detector is a piezo electric microphone and it
screws into the block.  It can go anywhere with a good solid mechanical
connection to the block, so that it can "hear" well.  The engine
specific filtering and processing is done in the ESC module, a separate
device on C3 ECMs and built into the memcal on C4 ECMs.  ESC sends a
yes/no signal to the ECM.

--steve


-- 
Steve Ravet
steve.ravet at arm.com
ARM,Inc.
www.arm.com

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