China's first natural gas engine with completely independent intellectual property rights up to the international advanced level has recently been successfully developed at FAW Xichai and will soon be put into mass production. As traditional buses are mainly diesel engines, black smoke often appears on the roads. In order to reduce bus exhaust emissions and purify urban air, FAW Xichai began research and development of pure natural gas engines three years ago, and invested more than RMB 50 million in scientific research. The power of natural gas engines and traditional diesel engines developed by FAW Xichai is almost the same, and pollutant emissions can be reduced by about 40%, which can effectively protect the urban environment. Compared with gasoline and diesel, natural gas also has a price advantage, which can greatly save bus operating costs. At present, natural gas engines have successfully entered the bus markets in Chengdu, Shijiazhuang and Changzhou. Yutong buses, FAW buses and other mainstream automobile manufacturers have also started to use Xichai natural gas engines as one of the main engines. Longshun Machinery Manufacturing Co., Ltd. , http://www.ykrollformingmachine.com