米勒循环与阿特金森循环凸轮轴摩擦扭矩对比研究

文章以汽油机为研究对象,通过对米勒(Miller)循环、基本型(Otto循环)和阿特金森(Atkinson)循环下的不同进气凸轮线型实验与仿真分析,采用动力计算软件EXCITE Timing Drive进行建模.由计算结果对比分析,得出结论,阿特金森循环凸轮与从动件间的接触时间最长,米勒循环凸轮力臂最大值最小,奥托循环...

Comparative study of friction torque between Miller cycle and Atkinson cycle Camshaft

This paper takes gasoline engine as the research object,the EXCITE Timing Drive software was used for modeling through experiments and simulation analysis of different intake CAM profile under Miller cycle,Otto cycle and Atkinson cycle.Based on the comparison and analysis of the calculated results,it is concluded that the contact time between atkinson cycle CAM and follower is the longest,the maximum value of Miller cycle CAM arm is the smallest,and the maximum value of Otto cycle CAM and Atkinson cycle CAM arm is equivalent.By comparing with the measured results,it is found that the friction torque of the three kinds of cams decreases as a whole with the increase of rotating speed,which is of great guiding significance for the design and development of the CAM line.