中文摘要：

汽车尾气中的有害物主要有CO，HC，NOx,SOx以及一些微粒物质，给人类赖以生存的大气环境带来了严重的危害。汽车尾气用NOx传感器开发主要是为了解决NOx（包括NO,NO2）的排放问题，能够实现准确、快速地测定NOx含量，从而满足大气质量检测和环境保护的要求。目前。NOx气体传感器主要有半导体型、电位型和电流型。主要介绍了这3种汽车用NOx传感器的原理、结构及应用。并简要分析了其向微型化、集成化和智能化等方向发展的趋势。

英文摘要：

The pollutants in automobile exhaust gases mainly are CO, HC, NOx, SOx and some particulates. The exhaust gases seriously pollute our living environment. NOx sensor for monitoring Car exhaust gases is＇ studied for monitoring the content of NO, exhausts gases from automobiles in order to satisfy the requirements of monitoring atmosphere and protecting environment. NOx sensors can be divided into three types：semiconductor, potentiometric and amperometric gas sensor. Working mechanism, construction and application of the three kinds of sensors are introducted. Development trend of miniaturization, multifunction and integration and intelligence of the automotive sensor is also predicted.