Gads Spark attack-decay

[Walter Petermann]

Bruce Plecan wrote:
> 
> On some ecms they have a spark attack, and decay rate.  Meaning
> the longer there is spark knock the more timing retard is applied,
> right?.  Also after some period of time that retard decays, and full
> timing is restored.
>   So now if I had a perfect way of detecting knock, then I could instantly
> apply full, retard, and very very quickly let it erode right?.
>   Also on some engines there are some cylinders that are much more
> prone to detonation then others, so since no system is perfect, and
> simplicity is the key to design, would it make sense just to monitor
> those cylinders.   For lab use, and engineering stuff ya monitor all
> of them as close as possible, but for real world use what ya all think?.
>   Is trace ping still acceptable in the new car world?.
> Thanks
> Bruce

Hi Bruce,
don't know about 'state of the art', but back in the
eighties the Bosh Motronic ecms used to reduce the timing in
steps of 3 degrees (maybe related to the max resolution of
one flywheel tooth?) when knocking was detected. 

  Walter