[Diy_efi] Spark knock detection

[Perry Harrington]

Chevy says that the ECU just keeps puling out timing until it hits max
retard for RPM or until the 10v signal comes back.  Just a simple dumb
closed loop.

--Perry

On Thu, Sep 12, 2002 at 01:44:43PM -0500, James W. Harris wrote:
> 
> The knock detection output from the ESC module switches when the filtered
> input signal crosses a threshold (adaptive based on background noise, I
> believe) and that the duration of the time is proportional to the severity
> of the knock.  It's not simply an OK / Not OK indication.  It may be
> acceptable to operate an engine with the signal occasionally becoming
> active.
> 
> JW
> 
> 
> 
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-- 
Perry Harrington			Data Acquisition & Instrumentation, Inc	
perry at dainst dot com					 http://www.dainst.com/

Those who would give up essential liberty to purchase a little temporary safety
deserve neither liberty or safety. Nor, are they likely to end up with either.
                             -- Benjamin Franklin

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