UEGO IDEA was(Re: More UEGO stuff)

[Wen Yen Chan]

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]
> >>>
> >>
> >
> 
>