Knock Question

[xxalexx at ix.netcom.com]

> Date:          Mon, 16 Mar 1998 17:53:14 +0000
> From:          steve ravet <steve at sun4c409.imes.com>
> Organization:  International Meta Systems
> To:            diy_efi at efi332.eng.ohio-state.edu
> Subject:       Re: Knock Question
> Reply-to:      diy_efi at efi332.eng.ohio-state.edu

> xxalexx at ix.netcom.com wrote:
> > 
> > > From:          "M&D" <91coupe at bellsouth.net>
> > > To:            <diy_efi at efi332.eng.ohio-state.edu>
> > > Subject:       Re: Knock Question
> > > Date:          Sat, 14 Mar 1998 23:59:33 -0500
> > > Reply-to:      diy_efi at efi332.eng.ohio-state.edu
> > 
> > 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
> 
> I can't find any reference to it on the ST WWW page.  All I see are coil
> driver type parts, vb020, vb024, vb027.  Any idea who else might have a
> part like that?
> 
> --steve
Soory, I thought I saw add in recent SAE magazine.
I searched web for ionization spark plug
http://www.vehicular.isy.liu.se/Research/activity96/node5.html
gives a schematic.
http://www.delco.com/energy/energycatalog.html
says has comlete ignition system, did not state min. order.
Mecel in sweden does a lot of research
http://www.mecel.se/no_frames/home.htm

alex