Methods of using gas sensors

专利名称：Methods of using gas sensors发明人：Yong Miao,Christopher L. Whitt申请号：US15228499申请日：20160804公开号：US10012127B2公开日：20180703

专利附图：

摘要：Methods for monitoring the performance of an oxidizing catalyst device areprovided. Methods can include treating an exhaust gas stream with the oxidizing catalystdevice, determining a reference liberated oxygen (LO) species measurement of theexhaust gas stream, measuring a downstream LO species measurement of the exhaust

gas stream using a NOsensor in a catalyst inactive mode, and determining a LO speciesdifferential. The downstream NOsensor can comprise an amperometric sensor andinclude a NOselective reduction catalyst. Methods for using an amperometric NOsensorutilizing an NOselective reduction catalyst are also provided, and include operating theNOx sensor in a catalyst active mode to generate a first LO species measurement,operating the NOsensor in a catalyst inactive mode to generate a second LO speciesmeasurement, and comparing the first LO species measurement to the second LO speciesmeasurement to determine a LO species differential.

申请人：GM GLOBAL TECHNOLOGY OPERATIONS LLC

地址：Detroit MI US

国籍：US

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