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5.1.3 Example of ZrO2 Sensor for Vehicle Application
Next, several applications with ZrO2 sensor are introduced. Figure 5.1.3.1 shows the sensors installed on a microbus. NOx sensor and O2 sensor are directly installed at the bottom part of the exhaust pipe, and the receiver and the data logger are installed in a space beside the driver's seat compactly. Robustness and maintenancebility of ZrO2 sensor was verified in on-road tests lasted for approximately one year.
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Figure 5.1.3.1
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ZrO2 Sensors Installed on a Microbus
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Next, graphs in fig 5.1.3.2 show the result of correlation test of CLD and ZrO2 sensor on a chassis dynamometer with Japan 10-15 test mode. The chassis dynamometer can simulate on-road conditions, and is used for certification test or quantitative analysis of vehicle exhaust gas.
Figure 5.1.3.2 Test Run on a Chassis Dynamometer (Japan 10,15 mode)
From this result, one can see that there is a good correlation between ZrO2 sensor and CLD sensor, at vehicle measurement that requires fast response. The 5-second delay in the CLD (left figure) is due to the time the pump-drawn sampling gas reaches the sensor (detector) from the sampling point, whereas in-situ ZrO2-type NOx sensor measures gas concentration at the sampling point.
5.1.4 Application of ZrO2 Sensor for Stationary Source
Figure 5.1.4.1 shows measurement result for stationary source of NOx. There is also a good correlation to CLD.
Figure 5.1.4.1 Measurement Result for Stationary Source
■Setting of a detector <Gas turbine>
Test data sample at Diesel
power generator <C heavy oil>
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