本文阐明应用凸轮特性曲线来设计柴油机喷油泵凸轮的一种新方法。笔者在奥地利哈来恩Friedmann & Maier公司工作时对该法作了研究,并在格拉茨工业大学的博士论文中提了出来。于此特别考虑到最高许用泵室压力的过程,实际有效压力一点也不许超过它。这导致在凸轮的供油区段和减速区段之间引进一个过渡区段,在其间出现一个均匀下降的许用泵室压力。借此,可在更高的柱塞速度上进行供油,由于供油期的缩短带来了柴油机燃烧的改善。用余弦减速段代替圆形减速段,使加速度适应于弹簧力,可获得极限转速和供油速度方面的好处。最后说明了从凸轮的升程和速度曲线中计算出加工参数的方法。 This article illustrates a new way to design a diesel fuel injection pump cam using a cam characteristic curve. The author studied the law while working at the Friedmann & Maier Company in Haarlem, Austria, and presented it in a doctoral dissertation at Graz University of Technology. In this particular consideration of the maximum allowable pump chamber pressure process, the actual effective pressure is not allowed to surpass it at all. This results in the introduction of a transitional section between the fueling and decelerating sections of the cam, with a uniform drop in allowable pumping chamber pressure therebetween. As a result, fueling can be performed at a higher plunger speed, resulting in improved combustion of the diesel engine due to a shortened fueling period. Instead of a circular deceleration section with a cosine deceleration section, the acceleration is adapted to the spring force, gaining benefits in terms of speed limit and fueling speed. Finally, the method of calculating the machining parameters from the cam’s lift and speed curves is described.