O2 / Lambda Sensor Data

[Bruce Plecan]

Almost looks good up until the last line where it's mentioned, it's EGT
sensitive.   As the temp decrease it reads rich, well if the metering/timing
is wrong and changes EGT, then you back to quessing, and still need to tune
via plug readings.
Forra wide band to actually work right, it seems as thou that you have to
control the operating temp of the sensor itself, and have a sensor that is
designed to operate with varing backpressures.    If the sensor references
to room air, then it will be backpressure sensitive.
While this is alot better then the 10 LED displays, it still suffers from
the errors of the sensor itself.
Least as I see it.
Bruce



From: <Steve.Flanagan at VerizonWireless.com>
Subject: RE: RE: O2 / Lambda Sensor Data


> This is not the Wide Band O2 sensor that is being discussed here, is it?
> sf

> From: Will Reeve [mailto:will at reeve.org.uk]
> Subject: RE: RE: O2 / Lambda Sensor Data
> Sure. Lambda sensor bought from http://www.tuneparts.co.uk if you are in
the
> UK, 47.50UKP! This works as good as the expensive Bosch one.
> Meter kit details published by Silicon Chip -
http://www.siliconchip.com.au
> issue September and October 2000.
> Meter kits bought from Jaycar electronics http://www.jaycar.com.au , you
get
> a photocopy of both articles with this kit. They will ship worldwide.
> 62.95AUS dollars, thats about 22 UKP!
> Kit link:
>
http://filemaker.webfactory.com.au/DFX/jaycar/FMPro?-db=products.fp3&-format
>
=detail.htm&-lay=cgi&-sortfield=model%20%23&Category=KITS%20-%20AUTOMOTIVE&-
> recid=37118&-token=12680773&-find=
> The curve used in the PIC I scanned in ages ago for a friend, its at:
> http://www.btinternet.com/~wreeve/images/lambda.jpg
> I have the magazine article somewhere (my filing system is so bad  it
would
> take ages to find!) from memory, lambda signal goes into an opamp which
gets
> the 0-1V signal up to 0-5V, this goes into the ADC input of the PIC (a 16
> series microchip), the PIC looks up the A/F ratio using the curve,  then
> drives the 3 digit display via multiplex switching of the led elements.
> All the other kits I looked at didn't seem to do any fitting of the lambda
> output curve, the silicon chip one looks the best to me. I did find from a
> web search a page which had a few nice output 'v' temperature plots. As
the
> temperature of the sensor decreases the readings above stoich will read
> "richer" than they actually are.
> Will
> Behalf Of pat ford
> Sent: 26 April 2001 14:38
> To: diy_efi at diy-efi.org
> Subject: Re: RE: O2 / Lambda Sensor Data
>  can you post details ( schematics etc..) on these kits?

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