HIGH-TEMPERATURE POTENTIOMETRIC NO_x SENSORS BASED ON STABILIZED ZIRCONIA WITH OXIDE SENSING ELECTRODES

摘要

The environmental concerns oblige to face the problems of pollutant emissions from vehicles.According to EU studies,the primary sources of CO and NO_X emissions are automotive vehicles.To control and reduce these emissions,standards introduced in the majority of the countries worldwide foresee the use of On-Board Diagnostic (OBD) systems.At present,given the lack of reliable CO/hydrocarbons and NO_X sensors,OBD is performed using oxygen sensors.