UEGO IDEA was(Re: More UEGO stuff)

Walter Sherwin wsherwin at idirect.com
Tue Feb 2 00:31:10 GMT 1999


Thank-you.  Where could I find more information regarding the "Field
SFC-VTEC" controller?

Walt.


-----Original Message-----
From: Wen Yen Chan <chanwe at ecf.utoronto.ca>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Monday, February 01, 1999 7:06 AM
Subject: Re: UEGO IDEA was(Re: More UEGO stuff)


>Hello,
>
>Checkout the Field SFC-VTEC controller. In addition to allowing you to
>change the VTEC cut-over point it allows some adjustments (the transfer
>function can be a non linear function of engine speed and map) to
>be made to the fuel curves.
>
>On Mon, 1 Feb 1999, Bruce Plecan wrote:
>
>>
>> -----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.
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >-----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
>> >>>>
>> >>>>
>> >>>>
>> >>>>
>> >>>
>> >>>___________________________________________________________________
>> >>>You don't need to buy Internet access to use free Internet e-mail.
>> >>>Get completely free e-mail from Juno at
http://www.juno.com/getjuno.html
>> >>>or call Juno at (800) 654-JUNO [654-5866]
>> >>>
>> >>
>> >
>>
>>
>




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