BS ISO 19724-2020 Gasoline engines with direct injection一Cleanliness assessment of fuel injection equipment.
This document specifies cleanliness assessment procedures for evaluating the amount of debris present on the clean side of the constituent parts of high-pressure gasoline direct fuel injection systems. The presence of such debris could lead to a reduction in the system’s operational performance.
While other International Standards (e.g. ISO 16232) relate to the cleanliness of different types of components used in road vehicle fluid circuits, this document focuses on the special procedures applied for the components of gasoline direct fuel injection systems.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 14644-1, Clean rooms and associated controlled environments — Part 1: Classification of air cleanliness by particle concentration
ISO 16232:20 18, Road vehicles — Cleanliness of components and systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 16232 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.orgJobp
— I EC Electropedia: available at
4 Procedures
4.1 General
All tests shall be carried out in a clean laboratory environment. Failure to achieve a satisfactory blank test level of contamination could indicate unsuitable control of test conditions. Clean room conditions according to ISO 14644-1, class 8, are recommended as a minimum for these procedures.
The appropriate method to determine the required amount of fluid is by use of an extraction curve (declining test), as described in ISO 16232:2018, and B.1. In order to avoid each laboratory finding a different amount of fluid to be required, a guideline for the volume is given here for each component.
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