1.山东交通学院 汽车工程学院，山东 济南 250357；2.山东新凌志检测技术有限公司 山东 济南 250000
Abstract：In order to solve the problem of serious pollution of the surrounding environment of the emission inspection agency, based on the current China VI post-processing technologies and Infineon XE164 microcontroller, a diesel vehicle exhaust purification system of the emission inspection agency is designed combining with the heating device and the flow measurement device. According to the purification target, the calculation model of urea injection amount is determined, and the real vehicle test is carried out to test the purification rate of NOx and visible pollutants. The results show that the designed diesel vehicle exhaust purification system is reliable and effective, and the system has a significant purification effect on NOx and visible pollutants. The purification rate of NOx is 80%, and the purification rate of visible pollutants is 90%. This purification system effectively solve the problem of environmental pollution in diesel vehicle emission testing.
Keywords:emission inspection institutions of diesel vehicle; purification device; measurement and control system; purification efficiency