面对新世纪全球环保问题和能源短缺，许多国家正在开发汽车动力的替代系统。但汽油机和柴油机在未来几十年内仍将是最受欢迎、用途最广的动力装置。特别是柴油机作为商用汽车动力，其优点是无可比拟的如热效率最高，燃油消耗低，其重要性不仅是节约能源，同时也减少7影响气候的 Faced with the global environmental problems and energy shortages in the new century, many countries are developing alternative systems for automotive power. But gasoline and diesel engines will remain the most popular and versatile power plant in the coming decades. In particular, the diesel engine as a commercial vehicle power, its advantage is unparalleled, such as the highest thermal efficiency, low fuel consumption, the importance of not only saving energy, but also reduce the impact of climate