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一、前言近年来,由于提出了进一步降低发动机油耗和提高功率的要求,使降低占发动机总摩擦损失很大比例的活塞—活塞环副的摩擦损失成为重要的研究课题。用以往的拖动法不可能在着火运转条件
I. Introduction In recent years, due to the requirement of further reducing the fuel consumption of the engine and increasing the power, it is an important research topic to reduce the friction loss of the piston-piston ring pair that accounts for a large proportion of the total engine friction loss. Using the drag method in the past can not be operating conditions in the fire