高档柴油机油的分散性能研究

摘要

The soot sonication dispersion method for CJ-4 engine oil was established by simulation to relate the results of Mack T-11 engine test The influence of different dosage ashless dispersants on the dispersion ability and shear stability was investigated The results show that the ashless dispersants with different molecular structure have different dispersion abilities for soot dispersion Good dispersion ability and shear stability can be observed at suitable dosage of the ashless dispersants and less influence on the oil shear ability is found The CJ-4 diesel engine oil with the optimum amount of dispersant passes the Mack T-11 engine test.%建立了用于评定CJ-4油品烟炱分散性能的模拟试验方法--EOT超声分散法,评价了不同结构的无灰分散剂对烟炱的分散性能,并考察了无灰分散剂用量对油品烟炱分散性能和油品剪切稳定性的影响.结果表明:建立的EOT超声分散模拟试验方法与Mack T-11发动机试验的关联性较好,能有效评价CJ-4油品对烟炱的分散性能;不同分子结构的无灰分散剂对烟炱的分散性能不同;适宜的无灰分散剂用量既可保证油品的分散性能,又对油品的剪切稳定性影响不大;选择适宜的无灰分散剂及用量调配的CJ-4油品通过了Mack T-11发动机试验.