机动车已成为当今社会生产和人们日常生活必不可少的一种交通工具,也是社会实现进步与文明的重要标志之一,它给人们的工作及生活带来便利的同时,其排放的污染物已成社会一大社会公害,不仅污染人类赖以生存的环境空气质量,破坏自然生态环境的平衡,更直接的危害人们的身体健康和生命。治理机动车排放污染已引起世界各国的高度重视和社会各界的广泛关注,特别是美国、欧洲、日本等国都分别制订了更加严格 Motor vehicles have become an indispensable means of transportation for the production and daily life of people in our society. They are also an important symbol of social progress and civilization. While they bring convenience to people’s work and life, the pollutants emitted by them It has become a major social public hazard. It not only pollutes the air quality of the environment upon which human beings depend, but also destroys the balance of the natural ecological environment and directly endangers people’s health and life. Governing the emission of motor vehicles has drawn great attention from all countries in the world and drawn wide attention from all walks of life. In particular, the United States, Europe, Japan and other countries have formulated more stringent