DIY-WB

[Jörgen Karlsson]

The nature of the UEGO sensor makes it less sensitive to temperature
variation, the stochiometric reading does not change much with temperature
on any sensor.

The resistance over the pump cell and the sensor cell is the way to measure
the temperature of the sensor element. The resistance of the heater element
is also useful.

To say that one know the temperature of the sensor could mean the
temperature of the heater element and that is a design requirement since the
temperature needs to be regulated.

But for example ETAS don't use the heater element for reading the
temperature, they use the sensor element or the pump cell depending on the
sensor used. They also regulate the heater from the resistance of the
sensor/pump cell.

Jörgen



> In regard to the DIYWB.  I have read much about o2 meters.  Wideband, uego
> etc.  All of them have issues of temperature vs output.  ie, as
> the exhaust
> mix gets hotter, the readings change.  Does the NTK honda sensor output a
> temp reading to use for calibration?  Is this an issue with this sensor?


> I'm just curious to whether the kit remains accurate under extreme racing
> loads versus cruising mixtures.  I tune my car for track racing
> and cruising
> so I am interested to here.

> This is the claims from all AFR meter marketers out there that their kit
> knows the temp of the sensor and calibrates its output to correspond.

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