Wróblewski Piotr, Rogólski Robert
Faculty of Engineering, University of Technology and Economics H. Chodkowska in Warsaw, Jutrzenki 135, 02-231 Warsaw, Poland.
Faculty of Mechatronics, Armament and Aerospace, Military University of Technology, ul. Gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland.
Materials (Basel). 2021 Nov 12;14(22):6839. doi: 10.3390/ma14226839.
Currently, there are many methods of reducing the friction losses of the main components of an internal combustion piston engine. The operating conditions of internal combustion piston engines intended for the propulsion of ultralight aircraft differ significantly from those prevailing in the case of using these engines for the propulsion of vehicles. There are many studies on the influence of selected anti-wear coatings on the friction coefficients when using various lubricants, measured via tribometers. Unfortunately, the conditions obtained in the laboratory significantly differ from those prevailing in an engine operating under external conditions. The study investigated the influence of a change in the tribological parameters of TiN, TiAlN, CrN and DLC1 anti-wear coatings on the moment of resistance to the piston movement of an aircraft engine. The operating parameters of a real engine working in an aircraft were simulated. The main focus was on the coating layers of the sliding surfaces of the piston rings and the cylinder running surface. The properties of the coatings affect the correlation of the scale of the adhesion and cohesion phenomena of the oil to the opposite planes, and this determines the nature of the changes in the moment of resistance to engine motion. As it is commonly known, with an increase in the value of the maximum pressure of the working medium in the combustion chamber, the share of mixed friction in liquid friction increases, similar to the high oil temperatures occurring in aircraft engines. Therefore, there is a justified need to supplement the research in the field of analyzing the characteristics of the torque of resistance to motion for these engines, in particular in the field of the usable rotational speeds of the crankshaft. Applicable anti-wear systems based on selected coatings can significantly improve operational safety and noticeably reduce fuel consumption.
目前，有许多方法可降低内燃机活塞发动机主要部件的摩擦损失。用于超轻型飞机推进的内燃机的运行条件与将这些发动机用于车辆推进时的普遍条件有显著差异。有许多关于在使用各种润滑剂时，通过摩擦计测量所选抗磨涂层对摩擦系数影响的研究。不幸的是，实验室获得的条件与在外部条件下运行的发动机中的实际条件有很大不同。该研究调查了TiN、TiAlN、CrN和DLC1抗磨涂层的摩擦学参数变化对飞机发动机活塞运动阻力矩的影响。模拟了在飞机上运行的实际发动机的运行参数。主要关注活塞环滑动表面和气缸运行表面的涂层。涂层的性能影响油与相对平面的粘附和内聚现象规模的相关性，这决定了发动机运动阻力矩变化的性质。众所周知，随着燃烧室内工作介质最大压力值的增加，液体摩擦中混合摩擦的比例增加，类似于飞机发动机中出现的高油温情况。因此，有必要补充对这些发动机运动阻力矩特性分析领域的研究，特别是在曲轴可用转速领域。基于所选涂层的适用抗磨系统可显著提高运行安全性并显著降低燃料消耗。
