中文摘要：

为解决公交车柴油机加速冒黑烟的问题，研发了一套电动增压器．系统由气路、高速电机驱动的压气机、车载电源和用于识别运行工况的智能识别系统等组成．该系统采用24V车载蓄电池供电，并在瞬态工况如起步加速和急加速时采用间断工作，消耗蓄电池能量少．台架试验结果表明，柴油机安装电动增压器后性能得到明显改善：微粒排放、烟度排放和气体排放降低；燃油消耗率减少；输出扭矩增加．道路试验结果表明，电动增压器在城市公交车上安装便利、可靠，能有效消除加速冒烟并能显著提升发动机的动力性，改善燃油经济性．

英文摘要：

An additional electric supercharger （ES） system was developed to reduce the black smoke emission from diesel engine of bus. The ES system includes intake air system, a supercharger driven by high-speed electric motor, power supply system on board and an intelligent unit for recognizing operation condition. The ES system is powered by a 24-voltage battery on board and does not consume too much power due to its short running time. The ES installed on diesel engine only works for several ten seconds during transient operation such as engine starting and rapid acceleration, it does not work in the steady state operation. The testing results on bench show that with the help of additional ES, the performances of engine are improved remarkably, e.g. the intake air flow and torque increase, the exhaust emission reduces, the smoke is eliminated dramatically at sharp acceleration particularly, and fuel consumption also decreases. Furthermore, the installation of the ES system is convenient and reliable, and the tests on road obtain the same results as those on bench while the ES system is mounted on a bus.