本文件定义了评估窜气油气溶胶分离器和过滤装置的标准化和可重复的试验程序，并规定了开放式和封闭式曲轴箱通风系统中的实验室部分分离效率。 本文档中未评估过滤器寿命。 本试验的条件部分仅适用于满足ISO/TS 17536-2中引用的Dp稳定性要求的过滤器。 设备是否符合法规不在本文件范围内。 由于使用当前设备的精度有限，本文件不适用于效率高于99%的过滤器。

This document defines standardized and repeatable test procedures for the evaluation of blowby oil aerosol separators and filtering devices and specifies laboratory fractional separation efficiency in both open and closed crankcase ventilation systems. Filter life is not evaluated in this document. The conditioned portion of this test only applies to filters that can meet the Dp stability requirements referenced in ISO/TS 17536-2. Conformance of a device to legislation is outside of the scope of this document. Due to limited precision using current equipment, this document is not suitable for filters above an efficiency of 99 %.