【摘要】 利用ＨＡＡＫＥＲＯＴＯＶＩＳＣＯ ＲＶ２０ 型流变仪测试了６ 种ＣＤ级柴油机油和５ 种ＳＥ级汽油机油的粘温曲线，确定了它们在Ｖｏｇｅｌ和Ｗａｌｔｈｅｒ－ＡＳＴＭ 模型下的粘温关系． 研究结果表明：多级油的粘温性能优于单级油；在剪应变率小于６ ０００ ｓ－ １、温度低于１００ ℃的范围内，多级油并未表现出非牛顿特性．更多还原

【Abstract】 The visco temperature performance of six CD grade diesel engine oils and five SE grade gasoline engine oils was investigated with HAAKE ROTOVISCO RV20 rheological instrument. The visco temperature expressions based on Vogel and Walther models were determined. The results show that multi grade oil has better visco temperature performance than single grade oil. The results have also demonstrated that the non Newtonian performance of multi grade engine oil is not observable at a shear strain rate less than 6 000 s -1 and below the temperature of 100 ℃.更多还原