ISO/TC 22/SC 34/WG 11 - Separator performance, laboratory and engine test methods for crankcase ventilation systems

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 %.

This document defines standardized and repeatable test procedures by using internal combustion engines for the evaluation of blowby oil aerosol, and aerosol separators and filtering devices by specifying the engine blowby sampling procedure and engine fractional efficiency test in both open and closed crankcase ventilation systems running at steady state. Due to sampling requirements, measuring efficiency when there are transient flow conditions is not in scope. Separator life is not evaluated in this document. Conformance of a device to legislation is outside of the scope of this document.

ISO/TS 17536-2 defines standardized and repeatable test procedures for the evaluation of blowby oil aerosol separators and filtering devices and specifies laboratory gravimetric separation efficiency and system pressure tests in both open and closed crankcase ventilation systems. ISO/TS 17536-2 has a limitation of 0 % to 99 % for aerosol gravimetric efficiency. NOTE Gravimetric efficiencies >99 % may be difficult to measure due to long test durations and absolute filter weight measurements. Filter life is not evaluated in ISO/TS 17536-2. This test method only applies to devices that have a defined tubular inlet, outlet and drain that can be connected to the test equipment. For devices that lack such connections, for example, one that is built into a valve cover, see Annex A.

ISO 17536-1:2015 specifies general conditions, defines terms and establishes the basic principles for blowby oil aerosol separator performance tests by laboratory or engine and gravimetric or fractional test method.

ISO/TS 17536-3:2014 defines standardized and repeatable test procedures by using internal combustion engines for the evaluation of blowby oil aerosol separators and specifies engine gravimetric separation efficiency and system pressure tests in both open and closed crankcase ventilation systems. Filter life is not evaluated in this part of ISO 17536. Conformance of a device to legislation is outside of the scope of this part of ISO 17536 and the appropriate regulations are to be consulted.