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柴油机的气缸漏气,对柴油机的工作过程和燃油经济性有很大的影响。此外,当气缸的密封性能下降时,燃油的燃烧产物就会使曲轴箱内的机油污染,并在柴油机机体的内表面以及曲轴、连杆等零件上产生强烈的积炭。气缸的密封性能主要取决于气环的密封能力。一般,密封性能是根据从气缸窜入曲轴箱内的燃气数量来测定的。然而用这种方法来测定密封性能时,要求曲轴箱严加密封,但是这一点往往很难做到。此外,用这种方法时不可能对密封的工作情况作逐项分析,因而当漏气量增加
Cylinder air leakage of diesel engine, the working process of the diesel engine and fuel economy have a great impact. In addition, when the sealing performance of the cylinder drops, the combustion products of the fuel pollute the oil in the crankcase and generate strong carbon deposits on the inner surface of the diesel engine body, the crankshaft, the connecting rod and other components. Cylinder sealing performance depends on the sealing ability of the gas ring. In general, the sealing performance is measured based on the amount of gas that has flown into the crankcase from the cylinder. However, when this method is used to determine the sealing performance, the crankcase is required to be tightly sealed, but this is often difficult to do. In addition, with this method it is not possible to analyze the behavior of the seal item by item, so as the amount of blow-by gas increases