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首页> 外文会议>Proceedings of the 2009 spring technical conference of the ASME Internal Combustion Engine Division >TRI-AXIAL FORCE MEASUREMENTS ON THE CYLINDER OF A MOTORED SI ENGINE OPERATED ON LUBRICANTS OF DIFFERING VISCOSITY
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TRI-AXIAL FORCE MEASUREMENTS ON THE CYLINDER OF A MOTORED SI ENGINE OPERATED ON LUBRICANTS OF DIFFERING VISCOSITY

机译：粘度不同的润滑油驱动的SI发动机汽缸的三轴力测量

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摘要

Friction is a determining factor in the efficiency and performance of internal combustion engines. Losses in the form of friction work typically account for 10-20% of an engine's output. Improvements in the friction characteristics of the power cylinder assembly are essential for reducing total engine friction and improving the mechanical efficiency of internal combustion engines. This paper describes the development and implementation of a new concept of the 'floating liner' engine at Colorado State University that allows 0.5 crank angle degree resolved measurement of the forces on the cylinder along 3 axes - in the axial direction, the thrust direction, and along the wrist pin. Three different lubricants with differing properties were tested to observe the friction characteristics of each. Experimental results showed that the floating liner engine was able to resolve changes in friction characteristics coinciding with changes in lubricant viscosity and temperature. Axial force increases at TDC and BDC were observed as lubricant viscosity was decreased and larger amounts of mixed and boundary lubrication began to occur. For each test the axial friction force data was used to calculate total cycle friction work. The thrust and off-axis (wrist pin direction) forces are discussed under the same circumstances.
机译：摩擦是内燃机效率和性能的决定因素。摩擦功形式的损失通常占发动机输出的10-20％。动力缸总成的摩擦特性的改善对于减小总发动机摩擦和提高内燃机的机械效率至关重要。本文介绍了科罗拉多州立大学“浮动衬套”发动机的新概念的开发和实施，该概念允许通过0.5曲轴角分辨力测量沿3个轴（轴向，推力方向和沿着腕针。测试了三种具有不同特性的不同润滑剂，以观察每种润滑剂的摩擦特性。实验结果表明，浮动衬套发动机能够解决与润滑油粘度和温度变化相吻合的摩擦特性变化。随着润滑剂粘度的降低以及开始大量混合和边界润滑的出现，在TDC和BDC处观察到了轴向力的增加。对于每个测试，使用轴向摩擦力数据来计算总循环摩擦功。在相同情况下讨论了推力和离轴（腕销方向）力。

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