中文摘要：

介绍了＂EQD×××-××＂型柴油机的1000h混合负荷可靠性试验的试验方案.在该型柴油机的可靠性试验中,提出了开展柴油机磨损状态实时评价的概念,将磨损评价作为描述柴油机可靠性的一部分内容.在磨损评价时,通过运用油液分析中的光谱、铁谱和PQ分析等手段并结合趋势图分析,对该型柴油机试验阶段的磨损状态进行了识别.油液分析表明：在试验进行到400 h左右,试验柴油机出现了严重磨损,这一磨损评价结果与同一时段柴油机因阀座下沉引起气门间隙变小以及试验后柴油机拆检发现气门阀座磨损过大的实际情况相吻合.研究试验证实,磨损评价应成为分析柴油机可靠性的有机组成部分;将多种油液分析手段集成运用,可有效地描述柴油机可靠性试验过程中主要零部件的磨损状况,为柴油机可靠性评定提供了新的手段.

英文摘要：

The 1000 h reliability test of an EQD diesel engine was investigated. The concept of in site wear evaluation was used in the reliability test of diesel engine and the wear evaluation was designed as one method of identifying the reliability of diesel engine. On the wear evaluation, the oil analysis approaches such as oil spectrum analysis, ferrography and PQ analysis, with trend graph analysis, were adopted to describe the wear condition of every stage of test. The oil analysis results showed that the test engine worked in the condition of severe wear in the testing period of 400 hours. The wear evaluating result was consistent with the fact that valve clearance diminished due to valve seat going down and severe wear appeared on the valve seat after the testing engine disassembled and checked-up. The wear evaluation was useful for the reliability test of diesel engine and the integrated oil analysis approaches could evaluate the wear condition of main components in the reliability test of diesel engine. Therefore, the oil analysis approach will be a new method for the reliability identification of diesel engine.