现代工业文明始于西方,汽车工业同样源自欧美,在汽车领域的研究也较国内先行一步,其中也包括对于汽车替代能源的寻找和研发。早在20世纪80年代,美国就开始推广使用燃气汽车。上世纪90年代,美国燃气类汽车的数量每年平均约增长20%,LNG汽车的年均增长率达到50%左右。1990年,美国联邦政府颁布《清洁空 Modern industrial civilization began in the West, the automobile industry also originated in Europe and the United States, in the field of automotive research is also one step ahead of the domestic, which also includes the search for alternative energy vehicles and R & D. As early as the 1980s, the United States began to promote the use of gas vehicles. In the 90s of last century, the average number of gas-powered vehicles in the United States increased by about 20% on average each year while the average annual growth rate of LNG vehicles was about 50%. In 1990, the United States federal government promulgated the "clean air