“十一”期间京津冀地区严重雾霾天气尚未休止,10月20日,北国之城哈尔滨硝烟再起,冰城首日供暖即遭雾霾封城。雾霾锁冰城,机动车尤其是重型机动车尾气排放中的PM2.5难逃罪责。如何减少机动车尾气排放尤其是PM2.5的排放,成了摆在机动车制造厂面前的难题。“三龙一通”尤其是金龙联合汽车工业苏州有限公司(以下简称海格客车)作为国内主流 Severe smog weather in Beijing, Tianjin and Hebei during the “11th” period has not yet ceased. On October 20, the northern city of Harbin resumed smoking and the first day of ice-cold city was smogged. Smog lock ice city, PM2.5 motor vehicles, especially heavy-duty motor vehicle exhaust can not escape the guilty. How to reduce vehicle emissions, especially PM2.5 emissions, has become a problem placed in front of motor vehicle manufacturers. “Three dragons ” especially the Golden Dragon United Automotive Industry Suzhou Co., Ltd. (hereinafter referred to Haige Bus) as the domestic mainstream