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利用铁谱分析技术结合部分理化指标,通过对数台叉车内燃机在用润滑油的系统跟踪监测,给出了实际工况下内燃机在用润滑油变质趋势图,据此拟合出了数学模型,并对这种变化趋势的形成作了较为深入的理论探讨.对于严格控制和判断润滑油质量的变化程度以及润滑油的更换期都有着指导意义,同时为开发新型润滑油提供了一种可行的检测方法.“,”The oil quality degeneracy trend figure is given by using the iron spectrum analysis technique conjucted with partial physical-chemical indices,and systimatic track and inspecting the being used lubrication oil of sereval fork truck. The mathematic model is fitted based on the figure,and the theoretic inquiry about the trend\'s formation is made deeply. That has instructive meaning for serious control and judging the vary degree of the lubrication oil quality,and the change duration. Meanwhile to provide a new feasible inspecting method for developing new type lubrication oil.