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简要分析了ＷＫ－４挖掘机提升控制系统的功能、原理及工作特点，提出了故障描述与故障诊断之间关系的问题，指出在我国故障诊断领域普遍存在故障概念模糊、故障描述未能揭示故障机理本质等问题，这些问题导致了故障知识的积累和故障诊断系统开发的困难。本文提出了基于功能的故障描述思想，运用基本功靛的故障描述与分析方法，较系统地整理出了ＷＫ－４挖掘机提升控制系统各主要故障的名称、现象、原因、机理、后果、特征、检测量等一览表，该表对指导生产实际具有重要的参考价值。
The function, principle and working characteristic of WK-4 excavator hoisting control system are briefly analyzed. The relationship between fault description and fault diagnosis is put forward. It is pointed out that there is a widespread fuzzy concept in fault diagnosis field in our country, fault description fails to reveal faults The nature of the mechanism and other issues, these problems led to the accumulation of fault knowledge and fault diagnosis system development difficulties. This paper presents a function-based fault description, the use of the basic functions of the fault description and analysis methods, more systematically sorted out WK-4 excavator to enhance the control system of the main fault name, phenomenon, mechanism, consequences, features, The amount of inspection and other list, the table to guide the actual production of important reference value.