In view of the types of begrime The analysis and comparison of the technology and efficiency of different descaling in passenger car bogie are made the application prospect of the improvement technology of descaling in passenger car bogie is put forward .

针对客车转向架 积垢类型，对客车转向架不同除垢的工艺和效益进行分析与比较，提出客车转向架除垢改进技术的应用前景。

Use to simple chemistry cleanout means to get rid of the begrime in the work-surface of heating exchanger in order to improve its thermal efficiency of using process .

用简单的化学清洗方法彻底除去换热器工作表面的 积垢，提高其在使用过程中的换热效率。

To cover with black dirt or soot begrime .

使 积满 污垢 被黑色污垢或煤灰覆盖， 弄脏， 沾污。

The diagnosis results show that air mass flow sensor begrime seriously and lead to bad heat conductivity and weak signal due to severe deposits and with a large amount of air flow thus make gas mixture rare and lead to trouble .

诊断分析及 修复结果表明，该 车 装备 的 旁 通道 热线式空气质量流量传感器因严重 积垢 使热传导性变差，导致大流量时其输出信号偏低，从而使混合气过稀是导致上述故障的原因。