[Diy_efi] DIY_WB and stand alone ems

[Jörgen Karlsson]

Hi,

I seem to remember that I made a analog design that makes it possible to use
the diy_wb with an autronic ecu. It will only handle the rich side of
lambda=1. I will try to find it.

I am quite sure that I made a bascom-avr program for interfacing the two
too.
I haven't tested any of them but if anyone is interested in any of them I
can send you a mail.

Jörgen Karlsson

> -----Original Message-----
> From: diy_efi-admin at diy-efi.org [mailto:diy_efi-admin at diy-efi.org]On
> Behalf Of Jurgen Hartwig
> Sent: Thursday, July 11, 2002 2:49 PM
> To: diy_efi at diy-efi.org
> Subject: Re: [Diy_efi] DIY_WB and stand alone ems
>
>
> > has anyone interfaced the diy_wb with an Autronic ecu?
> >
>
> No, but I know three guys who would like to have that ability.  Autronic
> needs 0-1V input that is representative of 10-30:1 AFR.  You would need to
> convert the WBO2 output to the 0-1V scale.  A voltage divider won't work.
>
> The only way I see it is possible (at least from my limited experience) is
> to use a microprocessor with A/D convertor (from WBO2) and then D/A
> convertor (to Autronic).  I think that is what will work, but I
> haven't the
> foggiest idea how to do it.  Also, I noticed that the voltages out of the
> WBO2 were fluctuating rapidly.  It could be because my sensor was in the
> tailpipe, or maybe it was the leaking exhaust flanges.  If the voltage is
> not stable, I imagine you would need some form of filtering???
>
> Anybody else have some insight?
>
> Jay
>
>
>
>
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>



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