燃油稀释对柴油机油性能影响规律研究

以CK-4 15W40柴油机油为基础油，通过添加不同比例(质量分数分别为5%、10%、15%和20%)的0#柴油制备了不同燃油稀释比例的柴油机油，对稀释油品的基本理化性能(黏度、倾点、闪点和酸碱值)进行了测试. 采用曲轴箱模拟试验仪、加压差示扫描量热试验仪、点接触光弹流润滑试验台以及SRV试验机对稀释前后油样进行了结胶性能、抗氧化性能、弹流润滑以及边界润滑性能进行了研究. 结果表明：燃油稀释后的柴油机油黏度和闪点明显下降，倾点未发生明显变化，酸碱值和抗氧化性能有一定程度的降低. 弹流润滑条件下发动机油的油膜厚度降低，同时燃油稀释后柴油机油在边界润滑条件下的减摩与抗磨性能有所下降.Using CK-4 15W40 diesel engine oil as base stock, diesel engine oil samples with varying fuel dilution ratios were prepared by blending with 0# diesel at mass fractions of 5%, 10%, 15% and 20% respectively. Basic physicochemical properties (viscosity, pour point, flash point, and acid-base value) of the diluted oil samples were tested. A crankcase simulation tester, pressurized differential scanning calorimeter, point-contact elastohydrodynamic lubrication test rig, and SRV tester were utilized to evaluate the gelation resistance, oxidation resistance, elastohydrodynamic lubrication performance, and boundary lubrication performance of the oil samples before and after fuel dilution. The results demonstrate that the viscosity and flash point of the diesel engine oil decrease significantly after fuel dilution, while the pour point remains almost unchanged; the acid-base value and oxidation resistance decline to a certain extent. Under elastohydrodynamic lubrication conditions, the oil film thickness of the engine oil is reduced; meanwhile, the friction-reducing and anti-wear performance of the diesel engine oil deteriorates under boundary lubrication conditions following fuel dilution.

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背景概述

该数据集研究了燃油稀释对柴油机油性能的影响规律，通过添加不同比例的0#柴油制备稀释油品，系统测试了理化性能和摩擦学性能。结果表明，燃油稀释会显著降低油品的黏度、闪点、油膜厚度以及减摩抗磨性能，为柴油机油的优化和应用提供了实验依据。