介绍了一种测量小型内燃机曲轴箱漏气的容积式漏气测量仪。该仪器结构简单，操作方便，使用可靠，测量精度高，测量误差小于５‰，用该仪器测量１９５柴油机曲轴箱的漏气量，实测表明该仪器对气缸漏气具有很高的敏感度，为发动机的自动故障诊断分析提供了可靠的气缸气密性分析依据。 A volumetric air leakage measuring instrument for measuring crankshaft leakage of a small internal combustion engine is introduced. The instrument has the advantages of simple structure, convenient operation, reliable use, high measuring precision and measurement error of less than 5 ‰, and the leakage of 195 diesel engine crankcase measured by the instrument. Actual measurements show that the instrument has high sensitivity to cylinder air leakage and is The engine’s automated troubleshooting analysis provides a reliable basis for cylinder air-tightness analysis.