The author studies the mechanism that automobile emission pollutant engenders and its inspection theory , from the perspective of simulating vehicle operating actually , the author treats acceleration simulation mode as test method by comparing and analyzing inspecting automobile emission method 作者对汽车排气污染物的生成机理和检测原理进行了深入研究,通过对检测汽车尾气方法的分析,从模拟车辆实际行驶的角度出发,确定了加速模拟工况法作为本测试系统的检测方法。