This paper aims to evaluate the impact of different qualities of nano‐cerium dioxide (CeO₂) as the diesel additives on the friction and wear performance of the fuel injection system. Two different qualities of nano‐CeO₂ were selected to prepare stably dispersed CeO₂‐diesel blends. Their effects on the tribological behaviour of the injector body were studied on the RTEC friction tester. The results showed that the friction and wear properties of diesel blend with 10 ppm of CeO₂ (whether CeO₂‐1 or CeO₂‐2) were all improved compared with pure diesel. With the increase of CeO₂ addition (>10 ppm), the friction coefficient, wear width, and maximum wear depth of the wear scar increased. Compared with the blocky CeO₂, adding spherical CeO₂ into diesel had better friction and wear properties. Adding 10 ppm of CeO₂ to diesel has no negative impact on the friction and wear performance of the injector body, especially the spherical CeO₂.

中文翻译：

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CeO2-柴油混合物在喷油器主体上的摩擦学行为的实验研究

本文旨在评估作为柴油添加剂的不同质量的纳米二氧化铈（CeO ₂）对燃油喷射系统的摩擦和磨损性能的影响。选择了两种不同质量的纳米CeO ₂来制备稳定分散的CeO ₂柴油混合物。在RTEC摩擦测试仪上研究了它们对喷油器主体摩擦性能的影响。结果表明，与纯柴油相比，含10 ppm CeO ₂的柴油混合物（无论是CeO ₂ -1还是CeO ₂ -2）的摩擦磨损性能都得到了改善。随着CeO ₂的增加如果添加量（> 10 ppm），则磨损痕迹的摩擦系数，磨损宽度和最大磨损深度都会增加。与块状CeO ₂相比，向柴油中添加球形CeO ₂具有更好的摩擦和磨损性能。向柴油中添加10 ppm的CeO ₂不会对喷油器主体（尤其是球形CeO _2）的摩擦和磨损性能产生负面影响。