本研究的目的在于阐明有关２环活塞的油膜厚度、摩擦力和机油消耗量。试验研究表明，由于活塞间隙的大量窜气，使２环活塞的油膜厚度小于３环活塞时的油膜厚度。其结果是２环活塞的机油消耗量稍大于３环活塞的机油消耗量。采用作者们研制的专用试验装置，对摩擦力和机油消耗量与油环动态的相互关系进行了定量分析。 The purpose of this study is to clarify the film thickness, friction and oil consumption of the 2-ring piston. Experimental studies have shown that due to the large amount of blow-by gas in the piston clearance, the oil film thickness of the 2-ring piston is smaller than that of the 3-ring piston. As a result, the oil consumption of the 2-ring piston is slightly larger than the oil consumption of the 3-ring piston. A special test device developed by the authors was used to quantitatively analyze the relationship between friction and oil consumption and oil ring dynamics.