电极极化及其对NO_x传感器剩余氧气浓度的影响

The Electrode Polarization and Its Effect on Residue Oxygen NO_x Sensor

本文研究了西门子/NGK公司的NOx传感器及电极极化对传感器剩余氧气的浓度的影响,结果表明,第二个空腔内的氧气敏感电极的极化是导致产生18 ppm浓度NOx的主要原因,与V1=385 mV所显示的数值相比,这是高得多的剩余氧气的浓度,即氧气测量电极的极化是决定剩余氧气浓度大小的主要因素。

The Siemens/NGK NOx sensor for diesel vehicle applications are studied.The electrode polarization that affectsthe NOx output is explored.It is found that the electrode polarization of the residue oxygen sensing electrode is the major factordetermining the magnitude of the sensor＇s offset.