中速四冲程筒形活塞柴油机的比功率在不断提高。近二十年来由于平均有效压力和活塞平均速度的提高,活塞单位而积负荷有所增加。蛇形管冷却式活塞、环形内冷腔式活塞、特别是组合式活塞得到广泛的应用。本文以组合式活塞为重点讨论了以上几种活塞的使用情况,并报道了活塞部件的发展试验研究结果。 Medium-speed four-stroke cylindrical piston diesel engine than the continuous improvement of power. Over the past two decades due to the average effective pressure and the average piston speed increased, the piston unit and the increase in product load. Serpentine tube-cooled piston, ring-shaped cavity-cooled piston, especially the combination of piston has been widely used. In this paper, the use of the above-mentioned pistons is discussed focusing on the combined piston, and the results of the development of piston components are reported.