Knock Question

[Jim Davies]

On Mon, 16 Mar 1998 xxalexx at ix.netcom.com wrote:

> There must be over 100 papers on this subject.
> All manufactures are looking at measuring  ion current of combustion
> for individual cylinder a/f, pressure(knock), and misfire detection.
> It seems the simplest method is to run a constant DC voltage across
> spark plug after firing. A current will be generated depending on 
> ions in gas.   I was looking into this last year, I will try to give 
> a literature review later.  I think SGS just came out with a chip.
> alex
> 
SAE had a good article about this topic in their magazine about a year ago
[guessing here...] If I can remember, i will try and find a date for it...

Jim Davies