随着社会经济的发展和人民生活水平的不断提高,汽车快速进入千家万户,在给人们工作、生活带来方便、快捷、舒适的同时,也给这个世界带来日趋严峻的能源与环保压力。在“低碳、环保”已经成为全球共识的背景下,除了加大力度对技术的研发和各种新技术、新材料、新工艺的普及采用 With the development of society and economy and continuous improvement of people’s living standards, automobiles have rapidly entered every household. While bringing convenience, speed and comfort to people’s work and life, they also bring increasingly severe energy and environmental pressure to the world . In the context of “low-carbon, environmentally-friendly” has become a global consensus, in addition to intensifying research and development of technology and the popularization of new technologies, new materials and new technologies