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美国是一直拒绝对“京都协议书”签订的唯一大国,对2007年召开的巴厘岛路线也采取保留态度。但在奥巴马上台后,有了很大转变,主张大力发展新能源,推行低碳革命,因为谁先彻底解决能源问题谁将主宰世界的新发展中的地位。奥巴马作出规划,到2014年轿车平均百公里油耗标准,要从目前的8.2升,降到6.6升,降低20%左右,这意味着,美国汽车要大力向新能源和小型化方向发展。面对国际越来越严峻的环保要求,我国发动机的发展趋势是以电动汽车为主流的多种能源并存的路线,目前我国新能源发动机有混合动力和电动发动机两种,而在能源利用上也呈现出多元和发展趋势,如早先美国政府鼓吹的氢能源技术和现在的电动
The United States has always refused to be the only big country signed by the Kyoto Agreement, and has also taken a reservation on the Bali route that was held in 2007. However, after taking office, Obama has made great changes and advocated the vigorous development of new energy sources and the promotion of a low-carbon revolution because whoever completely solved the energy problem will dominate the new developing world status. Obama plans to reduce fuel consumption by an average of 100 kilometers per car by 2014 from a current 8.2 liters to 6.6 liters, a decrease of about 20%. This means that U.S. vehicles should vigorously develop new energy sources and miniaturization. In the face of more and more stringent environmental requirements of the world, the development trend of China’s engine is the coexistence of a variety of energy sources with the mainstream of electric vehicles. At present, China’s new energy engines have two kinds of hybrid and electric engines. In terms of energy utilization Showing a diversity and development trend, such as the previous U.S. government advocated hydrogen energy technology and the current electric