先进尾气处理传感器的测试方法与经验总结.pdf

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1、Yang Li,Tyler RashOSAR 2024 ConferenceMarch 14,2024Advanced Aftertreatment Sensor Characterization Methods and Learnings2Prepared by Cummins for OSAROutlineIntroduction Sensor Fundamentals Team Overview NOx Sensor Operation and PerformanceMethods Sensor Characterization Methods Sensor Test MatrixRes

2、ults Test Matrix Results NOx Sensor Broadcasting Zero NH3SensorImplications and Conclusions3Sensor Fundamentals:Team OverviewWe have assembled a substantial,dedicated,sensor team&laboratory at Cummins to:Mitigate risk with introduction of new,unusual,&difficult AT sensor technologies Drive supplier

3、improvements.Reduce warranty and/or expand capabilities of mature technologiesPrepared by Cummins for OSARNOxSensor Performance Characterization&AgingGroup Lead:Planning,technical consulting,personnel developmentYang LiTyler Rash4NOxSensor Operation:Prepared by Cummins for OSARNOx ElectrodeCeramic L

4、ayerCeramic LayerHeaterCeramic LayerAuxiliary ElectrodeCeramicMain Electrode(-)Main Electrode(+)Air Reference ChamberExhaust GasNO is diffused into N and O,then Oxygen pumped out through the ceramic2Normal Operation2N22Ref222This slide was based on a slide produced by Alok Joshi circa 2013N2N2222 Te

5、mperature Pressure Flow Gas CompositionFactors5Environment That We StudyWhat to expect during the RMC-SET?Prepared by Cummins for OSAR6Estimated NOx Emission with DieselPrepared by Cummins for OSAR7Estimated NOx Emission Diesel(left)vs Natural Gas(right)Prepared by Cummins for OSAR8Sensor Characteri

6、zation Methods:Sensor Exerciser and Test Instrument(SETI)Prepared by Cummins for OSARGas Flow Bench Capabilities Test 9 sensors at a time Customizable sensor comm.interface.Temperature Range:20-550 oC.Isobaric flow sweep capability(40 psi)Flow Range:20 250 LPM 0.2 sec response time measurements Inde