UEGO IDEA was(Re: More UEGO stuff)

[Walter Sherwin]

Sounds like there is a lot of pent up UEGO talent out there.  Here is an
idea for a product that about half of us could really use right now  (I'd
buy two if I could find such an animal).   Picture
this........................................................you are working
on a GM style MAP based system, that is to be converted to artificial
aspiration.  Perhaps it was originally artificially aspirated, or perhaps it
was not.   Once the basic control "system" is in place, you and I are still
faced with the challenge of remappping the open loop VE tables.   Remapping
the VE's can be done labouriously, through data logging, and post hex
editing.

What about a control box which would take a UEGO signal, and perform an
appropriate transform equation, and then export the resultant signal to an
output port which one could connect to the O2 sensor pin of an OEM  MAP
computer.    The goal would be to make an artificial setpoint (say 11.5:1
A/F ratio) appear to the OEM computer as stoich.  If this were possible,
then one could use the OEM computer to generate BLM's and iteratively (read
this as safely) reach the perfect "MAP" while driving, or while on a chassis
dyno.  Imagine, in one afternoon, you could do the work of several days.
This would even help the normally aspirated guys.

Just food for thought.  If anyone comes up with one of these (or knows where
I can find one)  then let me know, please.



Thanks;
Walt.











-----Original Message-----
From: Bruce Plecan <nacelp at bright.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Saturday, January 30, 1999 9:39 PM
Subject: Re: More UEGO stuff


>
>-----Original Message-----
>From: Raymond C Drouillard <cosmic.ray at juno.com>
>To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
>Date: Saturday, January 30, 1999 11:39 PM
>Subject: Re: More UEGO stuff
>
>Gee, sounds so easy.  Hmm, care to whip up a ION?.
>I certainly hope you weren't making light of Steve's work.
>Bruce
>
>
>>I would buy one.  Of course, if I happen to "stumble" across a design
>>before the kit is available, I would simply build it myself.  The
>>circuitry on a UEGO isn't all that complicated.  In its most basic form,
>>it is a single op-amp and a few discretes.  Add a few more components for
>>a double-ended power supply, something to shut off the ion pump when it's
>>not warm, something to regulate the heater, and you have it.
>>
>>Ray Drouillard
>>
>>
>>On Sat, 30 Jan 1999 14:25:13 -0600 Steve Gorkowski <kb4mxo at mwt.net>
>>writes:
>>>If one would come as a kit for under $200.00 with sensor. How many
>>>would
>>>buy the kit ? No sense to design if one if no one was interested in a
>>>wide O2 meter.
>>>
>>>Steve
>>>
>>>Mike Pitts wrote:
>>>
>>>> Any interest?  Is this a waste of bandwidth?
>>>>
>>>> "This invention provides an self-calibrating buffer amplifier
>>>> for a Universal Exhaust Gas Oxygen sensor interface circuit
>>>> which couples and processes a voltage signal proportional
>>>> to pumping cell current to a level and reference voltage suitable
>>>> for input to an A-to-D convertor. The goal of this invention is to
>>>> increase the accuracy of air-to-fuel ratio control by continually
>>>> correcting for the effects of offset quantities in the amplifier
>>>> stage necessary to the interface circuitry. This goal is
>>>accomplished
>>>> by an approach which effectively generates and subtracts these
>>>> offset quantities from the processed signal. "
>>>>
>>>> http://patent.womplex.ibm.com/details?pn=US05211154__
>>>>
>>>> -Mike
>>>
>>>
>>>
>>>
>>
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>