ISO 12345:2021
Diesel engines — Cleanliness assessment of fuel injection equipment
This document specifies cleanliness assessment procedures for evaluating the amount of debris found within the clean side of diesel fuel injection assemblies, which could lead to a reduction in the system’s operational effectiveness.
While other International Standards, e.g. ISO 16232, relate to cleanliness of components used in road vehicle fluid circuits, this document is focused on diesel fuel injection assemblies as supplied to diesel engine manufacturers or the service market.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test apparatus
4.1 Pressure source
4.1.1 Fuel injection pump test bench
4.1.2 Hand-lever-operated testing and setting apparatus
4.1.3 High-pressure pulsating flow rig
4.1.4 Verification low-pressure pump
4.1.5 Verification high-pressure delivery pump
4.1.6 Pressure vessel
4.1.7 Flushing pump
4.2 Verification high-pressure pipe assembly
4.3 Verification test injector
4.4 Collecting vessel
4.5 Verification rail
4.6 Equipment for contamination measurement
4.6.1 Gravimetric analysis apparatus
4.6.2 Microscopic analysis apparatus
4.7 Test fluid
4.7.1 Calibration fluid
4.7.2 Solvent, aliphatic hydrocarbon
4.7.3 Water, de-mineralised
4.8 Clean-up filter
4.9 Pressure gauge
5 Procedure
5.1 General
5.2 High-pressure supply pumps (common rail fuel injection system)
5.2.1 General
5.2.2 Dynamic test with the test pump running
5.2.3 Flushing test at low speed with the test pump running by hand
5.3 Unit injectors
5.3.1 General
5.3.2 Equipment set up and verification of cleanliness
5.3.3 Test procedure
5.4 Fuel injection pumps
5.4.1 General
5.4.2 Equipment set up and verification of cleanliness
5.4.3 Test procedure
5.5 CR fuel injectors
5.5.1 General
5.5.2 Dynamic test
5.5.3 Continuous high-pressure flow test
5.6 Fuel injectors (nozzle holder assemblies)
5.6.1 General
5.6.2 Dynamic test
5.6.3 Syringe test (washing out injectors)
5.7 High-pressure fuel injection pipes
5.7.1 General
5.7.2 Dynamic test
5.7.3 High-pressure flushing test
5.7.4 Syringe (solvent dispenser) or hand flush test
5.8 Rails
5.8.1 General
5.8.2 Pressure vessel flushing test
5.8.3 Low-pressure flushing test
5.8.4 Syringe or hand flush test
5.9 Low-pressure systems
5.9.1 General
5.9.2 Equipment set up and verification of cleanliness
5.9.3 Test procedure
6 Sample analysis
6.1 General
6.2 Gravimetric analysis
6.3 Particle size distribution
7 Reporting of the inspection results
8 Designation of cleanliness requirements
Annex A (normative) Typical test equipment for measuring fuel injection equipment cleanliness
Annex B (normative) Rail low-pressure flushing test
Annex C (normative) Procedure for verifying test equipment initial cleanliness
Annex D (normative) Determination of flushing parameters for rail pressure vessel flushing test
Annex E (informative) Comparison of CCC (component cleanliness code, ISO 16232) to FIECC (fuel injection equipment cleanliness code, ISO 12345:2013)
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test apparatus
4.1 Pressure source
4.1.1 Fuel injection pump test bench
4.1.2 Hand-lever-operated testing and setting apparatus
4.1.3 High-pressure pulsating flow rig
4.1.4 Verification low-pressure pump
4.1.5 Verification high-pressure delivery pump
4.1.6 Pressure vessel
4.1.7 Flushing pump
4.2 Verification high-pressure pipe assembly
4.3 Verification test injector
4.4 Collecting vessel
4.5 Verification rail
4.6 Equipment for contamination measurement
4.6.1 Gravimetric analysis apparatus
4.6.2 Microscopic analysis apparatus
4.7 Test fluid
4.7.1 Calibration fluid
4.7.2 Solvent, aliphatic hydrocarbon
4.7.3 Water, de-mineralised
4.8 Clean-up filter
4.9 Pressure gauge
5 Procedure
5.1 General
5.2 High-pressure supply pumps (common rail fuel injection system)
5.2.1 General
5.2.2 Dynamic test with the test pump running
5.2.3 Flushing test at low speed with the test pump running by hand
5.3 Unit injectors
5.3.1 General
5.3.2 Equipment set up and verification of cleanliness
5.3.3 Test procedure
5.4 Fuel injection pumps
5.4.1 General
5.4.2 Equipment set up and verification of cleanliness
5.4.3 Test procedure
5.5 CR fuel injectors
5.5.1 General
5.5.2 Dynamic test
5.5.3 Continuous high-pressure flow test
5.6 Fuel injectors (nozzle holder assemblies)
5.6.1 General
5.6.2 Dynamic test
5.6.3 Syringe test (washing out injectors)
5.7 High-pressure fuel injection pipes
5.7.1 General
5.7.2 Dynamic test
5.7.3 High-pressure flushing test
5.7.4 Syringe (solvent dispenser) or hand flush test
5.8 Rails
5.8.1 General
5.8.2 Pressure vessel flushing test
5.8.3 Low-pressure flushing test
5.8.4 Syringe or hand flush test
5.9 Low-pressure systems
5.9.1 General
5.9.2 Equipment set up and verification of cleanliness
5.9.3 Test procedure
6 Sample analysis
6.1 General
6.2 Gravimetric analysis
6.3 Particle size distribution
7 Reporting of the inspection results
8 Designation of cleanliness requirements
Annex A (normative) Typical test equipment for measuring fuel injection equipment cleanliness
Annex B (normative) Rail low-pressure flushing test
Annex C (normative) Procedure for verifying test equipment initial cleanliness
Annex D (normative) Determination of flushing parameters for rail pressure vessel flushing test
Annex E (informative) Comparison of CCC (component cleanliness code, ISO 16232) to FIECC (fuel injection equipment cleanliness code, ISO 12345:2013)
Bibliography