ISO/TS 17536-2:2026

Overview

ISO/TS 17536-2:2026 specifies standardized laboratory test methods for evaluating the performance of aerosol separators in road vehicle internal combustion engines. This technical specification, published by the International Organization for Standardization (ISO), focuses on test procedures for measuring the gravimetric separation efficiency and system pressure characteristics of blowby oil aerosol separators and filtering devices. The methods ensure repeatable, accurate assessment in both open and closed crankcase ventilation systems, supporting effective engine emission control and oil management.

Key Topics

• Aerosol Separator Testing: The document details laboratory test methods for blowby oil aerosol separators and filtering devices, including gravimetric separation efficiency testing and system pressure measurement.
• Gravimetric Efficiency: Tests are defined to measure aerosol separation efficiency across a range from 0% to 99%. Efficiency levels above 99% are noted as difficult to verify due to the limitations of test duration and filter weight measurement precision.
• Applicable Devices: Only separators and filters with defined tubular inlets, outlets, and drains suited for test equipment connections are within the method’s scope. For devices integrated into engine parts without standard connections, Annex A provides additional guidance.
• Pressure and Flow Measurement: Procedures standardize airflow, pressure loss, and differential pressure tests, with corrections to standard laboratory conditions (20°C, 0% RH, 101.3 kPa).
• Test Conditions: Test oil, aerosol size distribution, and environmental conditions are standardized to ensure repeatability and comparability across devices.
• Equipment and Setup: Specifies required test equipment-such as piezometers, aerosol generators, manometers, and flow meters-and outlines exact laboratory configurations for pressure loss and efficiency assessments.

Applications

ISO/TS 17536-2:2026 is valuable for automotive engineers, laboratories, separator manufacturers, and emission compliance specialists who need to:

• Evaluate Separator Performance: Objectively measure the performance of blowby oil aerosol separators used in internal combustion engines to control oil mist emissions.
• Quality Assurance: Ensure separator devices meet industry-accepted levels of gravimetric efficiency and minimal pressure losses, supporting product consistency and regulatory compliance.
• Design Validation: Support R&D and product optimization by providing repeatable, comparative data on new or improved separator technologies before integration into production engines.
• Emission Control Compliance: Meet environmental and regulatory requirements through verified separator performance, contributing to reduced engine emissions and improved durability.
• System Integration: Aid in the proper selection, sizing, and installation of separators in both open and closed crankcase ventilation systems, accommodating a range of engine architectures.

Related Standards

• ISO 17536-1:2015: General requirements and definitions for road vehicle aerosol separator performance testing, providing foundational terminology and supporting methodologies referenced throughout Part 2.
• ISO/IEC Directives (various): Editorial and procedural guidelines for ISO standards development and maintenance.
• IEC Electropedia & ISO Online Browsing Platform: Authoritative references for terms, definitions, and ongoing updates to standardization vocabulary.

For effective laboratory testing, separator manufacturers and users should also familiarize themselves with related standards for component connection requirements, test oil properties, and gravimetric measurement techniques.

Keywords: ISO/TS 17536-2:2026, aerosol separator, blowby oil separator, internal combustion engine, crankcase ventilation, gravimetric efficiency, road vehicles, laboratory test method, separator performance, emission control.