Fw: Wide band O2 ????

[jdbubb at ix.netcom.com (Dan Bubb)]

"Did I read earlier in this thread, that I cannot use this on an older
system, are they compatbile doing it the way that I have written it up
here?"

You can use a 3 wire narrow band O2 sensor in a CIS-lambda car by just
supplying 12V to the heater circuit whenever the fuel pump is running.
You cannot use the output from a WB-O2 with either CIS-E or CIS-lambda since
it's output is 0-5V range where a NB-O2 has a 0-1V range. Also, the output
is inverted. Lean is low on a NB and high on a WB.
Some of the WB controllers do have an auxillary output that mimics the NB
range.
Most aftermarket engine management systems will interface directly with a
WB-O2 controller.
Did that answer the question?
Dan

----- Original Message -----
From: <mr.utility@highstream.net>
To: Adrian <adrian.culda@sympatico.ca>
Cc: 'Dan Bubb' <jdbubb@ix.netcom.com>; <scirocco-l@scirocco.org>; 'Ron
Pieper' <rapieper@yahoo.com>
Sent: Friday, October 24, 2003 4:54 PM
Subject: RE: Fw: Wide band O2 ????


> Thank you sir!
>
> On the note of how quickly the WBO2 sensors work, I was thinking they
would be
> faster, but I just assumed it...  I shall have to look at this very
closely,
> perhaps put one on my car, with a hot lead switched with the FI system to
> run...  Did I read earlier in this thread, that I cannot use this on an
older
> system, are they compatbile doing it the way that I have written it up
here?
>
> TIA
>
> David
>
> Quoting Adrian <adrian.culda@sympatico.ca>:
>
> > Well Wide bands work on a different system than the old narrow band
> > sensors.
> > They are far more accurate due to the stable operating temperature. Not
> > only that but the latency of the narrow band O2 sensor is about 0.5 (~2
> > samples/sec.)second compared to the wide band which is 0.03 (~25-30
> > samples/sec.)!!!
> >
> > How the O2 Sensor Works
> >
> > The oxygen sensor detects oxygen in the exhaust in a way similar to a
> > battery cell. Platinum layers on the inside and outside of the probe act
> > as electrodes. Zirconium dioxide between the layers of platinum acts as
> > an electrolyte. The inside layer of platinum is exposed to the air in
> > the engine bay, the outer layer is exposed to the exhaust. When the O2
> > sensor is hot it generates positive voltage between the two layers of
> > platinum. Negatively charged oxygen ions in the exhaust are attracted to
> > the platinum and reduce the voltage that the Engine Control Unit and
> > air/fuel gauge reads.
> >
> > That's why a rich mixture = higher voltage from the sensor (more gas =
> > fewer negative O2 ions to drop the voltage). Just remember "L=L", Lean =
> > Low voltage. You can attach a Volt Ohm meter (black to ground, red to
> > the O2 sensor) to monitor your engine's air/fuel ratio. I suggest you
> > have a co-pilot read the voltage while you accelerate at full throttle.
> >
> > The 3 wire sensors are used to give power and ground to pre-heat the
> > sensor so it starts working quicker and it has no effect after the
> > sensor gets warmed up.
> >
> >
> >
> > Adrian C.
> > Project Scirocco R2.oT - "The Turbocharged 16Valves of Fire Breathing
> > Fury"
> > ( 2.0L 16V T66 )
> >
> >
> > -----Original Message-----
> > From: scirocco-l-bounces@scirocco.org
> > [mailto:scirocco-l-bounces@scirocco.org] On Behalf Of
> > mr.utility@highstream.net
> > Sent: October 24, 2003 11:29 AM
> > To: Dan Bubb
> > Cc: scirocco-l@scirocco.org; Ron Pieper
> > Subject: Re: Fw: Wide band O2 ????
> >
> > Quoting Dan Bubb <jdbubb@ix.netcom.com>:
> >
> >
> > > 1. control the current to it's heater to maintain the sensor
> > temperature in a
> > > narrow band despite exhaust heat input (or lack thereof)
> >
> > > Dan
> > >
> > >
> >
> >
> > Correct me if I am wrong, but the only time the heater is used is at
> > initial
> > start-up, when the sensor is cold?  I was under the impression that that
> > was
> > the only time the heater is used, to further diminish emissions when the
> > O2 is
> > cold and not yet able to function completely....
> >
> > David
> >
> >
> > _______________________________________________
> > Scirocco-l mailing list
> > Scirocco-l@scirocco.org
> > http://neubayern.net/mailman/listinfo/scirocco-l
> >
> >
>
>
>