【摘要】 通过调整共轨蓄压式电控喷射器的结构参数 ,可以实现基本型、快速断油型和分次喷射型的喷油规律。实验结果表明 :基本型喷射方案的燃烧放热规律呈现以预混合燃烧为主的单峰结构 ,缸内压力上升率较高 ;快速断油型喷射方案在基本型的基础上加快了停喷速度 ,可以获得更好的微粒与 NOx 折中关系 ,而且烟度对喷油提前角的变化不敏感 ;与单次喷射方案相比 ,使用分次喷射方案可以获得更好的烟度与 NOx 折中关系。更多还原

【Abstract】 Three injection rates such as basic,cut off and split are achieved by adjusting the structure parameters of the PAIRCUI accumulated common rail injector.The experiment shows that the shape of the combustion releasing rate of the basic injection is a single peak,and the premixing combustion with a high pressure rising rate is the main combustion process in this combustion process.The cut off injection rate is benefit for improving the PM NO x trade off relationship.It is also find that the smoke emissions are not sensitivity with the injection time when the cut off injection rate is used.Compared with the single injection the split injection can get better smoke NO x trade off relationship.更多还原