CK-4柴油机油分散性能模拟试验评价方法的建立与添加剂结构优化

基于对Mack T-11发动机台架试验工况及发动机烟炱形貌、结构分析，建立了与Mack T-11台架试验关联性较好的润滑油烟炱分散性能模拟评价方法—炭黑老化分散模拟试验；通过炭黑老化分散模拟试验和分子模拟手段考察了不同结构无灰分散剂对油品烟炱分散性能的影响。结果表明：新建立的炭黑老化分散模拟试验可以有效评价高档柴油机油的烟炱分散性能；采用该模拟试验筛选的特定结构无灰分散剂具有优异的烟炱分散性能；通过该模拟试验优化润滑油基础油和添加剂复合配方，所得油品通过了Mack T-11发动机试验。

THE ESTABLISHMENT OF SOOT DISPERSION SIMULATIVE METHOD AND STRUCTURE OPTIMIZATION OF ADDITIVES FOR CK-4 DIESEL ENGINE OIL

A new soot dispersion method-diesel engine oil aging-soot dispersion method was established to simulate the Mack T-11 engine test on the basis of the analysis of the Mack T-11 engine test conditions and the soot shape and composition. The influence of different composition ashless dispersant on the dispersion ability of diesel engine oil was investigated by the new dispersion method and molecular simulation technology. The results showed that the new dispersion method could effectively evaluate the soot dispersion performance of the high-grade diesel engine oil. The optimum dispersant was found by the new dispersion method and molecular simulation technology. The engine oil with the optimum additives and base oils passed the Mack T-11 engine test.