[Diy_efi] NTK wideband sensor

[Garfield Willis]

On Wed, 06 Nov 2002 22:51:04 +1100, Peter Gargano
<peter at techedge.com.au> wrote:

>A single sensor will give you as good a curve as any other. Two hundred
>sensors will give you even more confidence that your single sensor had
>just as good a curve as any of the other.

You've obviously NEVER actually calibrated one of these sensors, have
you? I see that doesn't seem to stop you from continuing to spread
disinfo about them. The CURVES also vary from sensor to sensor. No two
are alike, even when modeled as a 'family curve' with merely gain
changes from mfg. When you get a calibration curve from NTK or some
other sensor vendor, that curve is a composite showing the centroid
response at each AFR or a statistically significant sample. In addition
to the overall gain changing from sensor to sensor, they also are each
unique, so you can't just build your entire world around a sample of
ONE, as you appear to have done.

>If you're talking about how to experimentally determine how the factory
>supplied calibration resistor would be used in a compensation circuit,
>then yes, you may need say 20 or more to be confidant you had cracked
>the mystery. 200? Sounds like a "my sensor inventory is longer than =
yours"
>pissing competition story.

Well, obviously it IS, since YOU and the DIY-WB people whose design you
lifted haven't done ANY kind of testing. You don't even have a clue as
to what you're working with, and you presume to tell me what's necessary
and not, when you haven't even done it yourself! The Cal R correction
isn't some "mystery" to be cracked with enough clues, it's both a method
AND another case of results giving you a spread over which you must
average out the variances so you have a good curve fit.

Yeah, I'm bragging about the fact that we've done our homework and know
what and how these sensors work; you on the other hand seem to enjoy
continuing to brag about your ignorance of these most rudimentary
details.

Gar


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