随着世界范围内汽车保有量的激增，汽车的有害排放物给人类的生存环境造成的严重污染，促使世界各国相继制定了严格的车辆排放法规。为此，国外许多国家开始大力发展天然气汽车。近年来，天然气汽车的研究和开发在我国也迅速兴起。用天然气作为汽车燃料，不仅可以节约石油资源 With the rapid increase in car ownership around the world, the serious pollution caused by the harmful emissions of automobiles to the living environment of mankind has prompted all countries in the world to successively establish strict vehicle emission laws and regulations. To this end, many foreign countries began to vigorously develop natural gas vehicles. In recent years, the research and development of natural gas vehicles are also rapidly emerging in our country. Using natural gas as a motor fuel can not only save oil resources