UEGO IDEA was(Re: More UEGO stuff)

[Bruce Plecan]

-----Original Message-----
From: Walter Sherwin <wsherwin at idirect.com>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Sunday, January 31, 1999 9:13 PM
Subject: UEGO IDEA was(Re: More UEGO stuff)

This idea, just universally raises the entire table.  Seldon is what is
needed.
Playing with the coolant temp/MAT, and MAP signals all do the same thing.
There ain't no short cuts, reprogramming done right, takes time.
Bruce


>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.
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>-----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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>>
>