Knock sensor - Kenne-Bell System

[Jeffrey S Armfield]

I would doubt (IMHO) that Kenne Bell is using anything as sophisticated
as looking at resistance measurements to do individual cylinder knock
control. My guess is that they only "listen" to the knock sensor during a
period a little before and a little after TDC on the firing stroke of each 
cylinder. Then, theoretically, they would only "hear" the knock of the cylinder
firing. After you have established which cylinder is firing and if it is 
indeed knocking, then changing the timing on a cylinder by cylinder basis
is no big deal anymore. 

Jeff Armfield