Technical Product Information - Breitband-Lambda
Technical Product Information - Breitband-Lambda
Technical Product Information - Breitband-Lambda
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<strong>Technical</strong> <strong>Product</strong> <strong>Information</strong><br />
3.2 Time to activity (light-off time)<br />
Y 258 E00 015e<br />
Seite/Page 8 von/of 13<br />
Datum/Date 14.6.2005<br />
Guide value for the time to activity after switching ≤ 10 s<br />
on the sensor heater (“light-off time”)<br />
3.3 Pressure dependency of the sensor signal<br />
A change of the exhaust gas pressure leads to a deviation of the sensor<br />
signal, which can be approximately described as follows:<br />
25,0%<br />
20,0%<br />
15,0%<br />
10,0%<br />
5,0%<br />
0,0%<br />
-5,0%<br />
-10,0%<br />
-15,0%<br />
-20,0%<br />
∆Ip/Ip(1013 hPa)<br />
lambda > 1<br />
lambda < 1<br />
-25,0%<br />
0,5 0,7 0,9 1,1 1,3 1,5 1,7 1,9 2,1 2,3 2,5<br />
absolute pressure<br />
Absolut-Druck in [bar]<br />
3.4 Temperature dependency of the sensor signal and the internal resistance of<br />
the Nernst-cell Ri,N<br />
A temperature change of the sensor ceramic gives a deviation of the sensor<br />
output signal of approx. ∆IP,meas/IP,meas = 4%/100°C<br />
The temperature is known by measuring the internal resistance of the Nernst<br />
cell RI,N and the following curve:<br />
Nernst cell resistance RIN / Ohm<br />
1000<br />
100<br />
operating point<br />
RI,N = 300Ω,<br />
Tceramic = 780°C<br />
10<br />
600 700 800 900<br />
Tceramic / °C<br />
1000 1100 1200<br />
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