【摘 要】
：
An experimental investigation of multiple injection at intake stroke under warm up conditions was performed in a GDI engine.With a constant excess air ratio
【机 构】
：
State Key Laboratory of Automotive Simulation and Control,Jilin University
论文部分内容阅读
An experimental investigation of multiple injection at intake stroke under warm up conditions was performed in a GDI engine.With a constant excess air ratio,the effects of multiple injection strategy at intake stroke on the combustion and emissions were studied.The results showed that,compared to single injection,with the increase of injection times and coolant water temperature,cylinder pressure increased and its corresponding crank angle was advanced for multiple injection at intake stroke,while the peak transient heat released ratio increased,but its occurrence timing was slightly advanced.
其他文献
在柴油发动机高压共轨系统中,共轨压力控制极其重要.市场上现有的轨压PID控制方法,无法在所有复杂工况下对燃油喷射系统均达到高精确度控制轨压的效果.为了解决此问题,本文提
基于STAR-CD软件在定容弹和发动机功率点两种工况下研究了不同网格尺寸对柴油机喷雾特性的影响.通过对比发现:随着网格尺寸的减小,喷雾模拟结果的准确性得到提高,喷雾初始段
FSAE比赛要求在节气门与发动机之间安装一截面为圆形且直径不大于20mm的限流阀以限制发动机功率.本文针对这一限制对发动机的进气系统进行再设计,本文采用了仿真计算的方法,
对以平均值模型转矩估计值为基准部分、以卡尔曼滤波器(Kalman Filter,KF)转矩估计值为修正部分的柴油机转矩估计方法进行了研究.平均值模型的输入量为发动机转速、进气压力
本文以多缸柴油机的冷却水腔为研究对象,使用Fluent软件对直列6缸柴油机冷却系统的流场进行仿真,主要研究了柴油机各缸水套和缸盖内部水腔压力和流场的分布规律,以及冷却液入
The friction and wear capabilities of four coatings piston ring which Chromium,PVD,PCVD and GDC were studied with simulated way.The results indicate that GD
对目前汽车行业中发动机曲轴的强化工艺以及淬火感应器进行了相关探讨,并针对一种具体的圆角淬火感应器,从硬件和淬火参数方面进行了相关节能优化改造研究.
两缸柴油机采用360℃A发火间隔角,在工作周期中会出现进气和排气空档角,导致进排气压力波动较大,引起涡轮效率的下降.针对这一问题,建立了2缸柴油机整机一维模型,并对涡轮内
在严格的排放法规和燃油经济性要求下,柴油机发动机的控制策略显得尤重要.基于模型的控制策略开发提高了产品的开发效率,减少了开发费用,硬件在环(Hardware In Loop,HIL)作为
本文基于自主开发的内燃兰金循环发动机试验台架系统,研究了不同压缩比对内燃兰金循环燃烧过程的影响.试验结果表明,喷水温度为120℃时,压缩比从10.5提升至12.5,与未喷水相比