电动增压补气消除柴油机瞬态加速冒烟的试验

Use of an electric supercharger to reduce black smoke emission from a diesel engine

将自行开发的、适用车载24V电源的电动增压补气系统在一台490QDI柴油机上进行了实验研究.实验工况包括起始负荷分别为0和40N.m的加载加速的瞬态工况以及1400r.min-1、60N.m,1600r.min-1、90N.m和1800r.min-1、120N.m3种低转速、大扭矩稳态工况,针对以上工况分别进行了有无电动增压补气的实验.试验结果表明,有电动增压补气的柴油机同原机相比,零负荷加载加速时的微粒排放降低达70%以上,瞬间输出功率最大可提高54.5%;在稳态工况时,HC、CO排放都随着电机转速的升高而降低,最大减少量分别达到66.7%和75.0%;波许烟度平均减小50%以上.此外,加速补气对提高燃油经济性也有一定效果,比油耗最大能降低7.46%.

The emissions produced by a 490QDI diesel engine with an in-house developed electric supercharger driven by an on board 24 volt battery were measured.The engine was operated under transient acceleration conditions for both free acceleration and under load.The engine was also run under steady state conditions at three low speeds and high torques（1400 r·min^-1,60 N·m, 1600 r·min^-1,90 N·m and 1800 r·min^-1,120 N·m）.The test results show that the particulate matter can be reduced 70% during free acceleration and the power output increased 54.5%,compared with the original engine.Under the steady state conditions,the HC and CO emissions decreased by 66.7% and 75.0% respectively and the smoke opacity dropped dramatically to 50% of the original.Also,the specific fuel consumption can be reduced by 7.46%.