ISO 17536-4:2019
Road Vehicles — Aerosol separator performance test for internal combustion engines — Part 4: Laboratory fractional efficiency test method
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 %.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, and abbreviated terms
3.1 Terms and definitions
3.2 Abbreviated terms
4 Measurement accuracy
5 Test materials and conditions
5.1 Absolute filter, wall flow trap and leakage
5.2 Test temperature
5.3 Test conditions
6 Test procedure
6.1 General
6.2 Test equipment
6.3 Aerosol generator
6.4 Aerosol sampling system
6.5 Particle sizing and counting monitor(s)
7 Apparatus qualification testing
7.1 Test stand verification
7.2 Concentration limit of the particle instrument
7.3 100 % efficiency test and development of purge time
7.4 Correlation test
7.5 Test duct air leakage test
7.6 Apparatus maintenance
8 Fractional efficiency test
8.1 General
8.1.1 New state (if possible)
8.1.2 Conditioned state as per ISO/TS 17536-2
8.2 Method
8.3 Calculations
8.4 Correlation and tare
8.5 Fractional efficiency test
9 Calculations and data acceptance criteria
9.1 Symbols used in following formulae
9.2 Symbols
9.3 Subscripts used in the following formulae
9.4 Average used in the following formulae
9.5 Test sampling
9.6 Correlation ratio
9.7 Penetration / Fractional efficiency
9.8 Efficiency
9.9 Data reduction
9.9.1 Correlation ratio data reduction
9.9.2 Correlation ratio data acceptance criteria
9.9.3 Penetration data reduction
9.9.4 Penetration Data Acceptance Criteria
9.9.5 Penetration maximum background counts
9.9.6 Penetration minimum upstream counts
9.9.7 Efficiency
Annex A (normative) Poisson statistics
Annex B (informative) Aerosol separator laboratory fractional efficiency test report
Annex C (normative) Test equipment
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, and abbreviated terms
3.1 Terms and definitions
3.2 Abbreviated terms
4 Measurement accuracy
5 Test materials and conditions
5.1 Absolute filter, wall flow trap and leakage
5.2 Test temperature
5.3 Test conditions
6 Test procedure
6.1 General
6.2 Test equipment
6.3 Aerosol generator
6.4 Aerosol sampling system
6.5 Particle sizing and counting monitor(s)
7 Apparatus qualification testing
7.1 Test stand verification
7.2 Concentration limit of the particle instrument
7.3 100 % efficiency test and development of purge time
7.4 Correlation test
7.5 Test duct air leakage test
7.6 Apparatus maintenance
8 Fractional efficiency test
8.1 General
8.1.1 New state (if possible)
8.1.2 Conditioned state as per ISO/TS 17536-2
8.2 Method
8.3 Calculations
8.4 Correlation and tare
8.5 Fractional efficiency test
9 Calculations and data acceptance criteria
9.1 Symbols used in following formulae
9.2 Symbols
9.3 Subscripts used in the following formulae
9.4 Average used in the following formulae
9.5 Test sampling
9.6 Correlation ratio
9.7 Penetration / Fractional efficiency
9.8 Efficiency
9.9 Data reduction
9.9.1 Correlation ratio data reduction
9.9.2 Correlation ratio data acceptance criteria
9.9.3 Penetration data reduction
9.9.4 Penetration Data Acceptance Criteria
9.9.5 Penetration maximum background counts
9.9.6 Penetration minimum upstream counts
9.9.7 Efficiency
Annex A (normative) Poisson statistics
Annex B (informative) Aerosol separator laboratory fractional efficiency test report
Annex C (normative) Test equipment
Bibliography