During the Operation of the engine the temperature graduate is likely to deform the piston ring, as may alter the contact situation at the opening of the piston ring and raise the radial pressure.
活塞环在运行状态下由于存在温度梯度而发生变形，导致活塞环开口附近接触状况变化和径向压力增加。
Several methods for radial pressure distribution measurement on a piston ring which is one of key parts of an inter combustion engine are analyzed in the article.
分析了内燃机中关键零件活塞环的重要参数径向压力分布的几种测量方法。
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