利用四球机考察含烟炱柴油机油的抗磨损性能
2012-09-28雷爱莲谢惊春徐小红王爱香夏群英
雷爱莲,谢惊春,徐小红,王爱香,夏群英
(中国石油兰州润滑油研究开发中心,甘肃兰州730060)
利用四球机考察含烟炱柴油机油的抗磨损性能
雷爱莲,谢惊春,徐小红,王爱香,夏群英
(中国石油兰州润滑油研究开发中心,甘肃兰州730060)
高档柴油机油研发中,烟炱引起的磨损是要解决的关键问题之一。该研究采用炭黑作为烟炱模拟物,加入试验油获得了被烟炱污染的柴油机油,以模拟实际发动机试验过程中产生的含烟炱油。并且利用四球磨损试验机为平台,研究建立了模拟试验方法,考察了含烟炱柴油机油的抗磨损性能。结果表明:方法能够有效区分含烟炱柴油机油的抗磨损性能,对不同类型分散剂和黏度指数改进剂在含烟炱柴油机油中的抗磨损性能具有较好的区分性,试验方法有较好的重复性,可以帮助高档柴油机油的研发。
含烟炱柴油机油;抗磨损性能;模拟试验
Abstract:Wear generated by soot in oil is a critical problem in high grade diesel engine oil research work.This soot generated in the full size engine test stand was replaced by a simulator which is called carbon black in this bench test method research work.A related simulation test method was established based on 4-ball wear test machine and the anti-wear performance of the diesel engine oil containing soot was also studied.A series of test results showed that the newly developed bench test method is a good screening tool for diesel engine oil formulation research work with regard to its anti-wear performance.And this test method has good discrimination to the anti-wear performance of oils blended with different kinds of dispersants and VI improvers.The satisfied repeatability is achieved also.
Key words:diesel engine oil containing soot;anti-wear performance;simulation test
0 引言
近几年,随着人们对环保意识的日益增强,对机动车辆的排放物提出了苛刻的排放指标要求。为了减少NOx的排放量,柴油汽车制造商在发动机设计和燃烧技术方面采取了许多技术措施,但也带来了负面影响。最直接的影响是:柴油机在苛刻的燃烧条件下,会产生烟炱,同时也使更多的烟炱滞留在发动机内。在高烟炱水平的条件下,要保持发动机高效工作和延长寿命,需要相应的高性能柴油机油来提供良好的保护。美国石油学会(API)发布的CF-4及以上规格的柴油……
