Gasoline engines with direct injection -- 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.

Moteurs à essence -- Evaluation de propreté pour équipement d'injection de combustible

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Status
Published
Publication Date
01-Jun-2020
Current Stage
6060 - International Standard published
Start Date
02-Jun-2020
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INTERNATIONAL ISO
STANDARD 19724
Second edition
2020-06
Gasoline engines with direct
injection — Cleanliness assessment of
fuel injection equipment
Moteurs à essence — Evaluation de propreté pour équipement
d'injection de combustible
Reference number
ISO 19724:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 19724:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 19724:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Procedures .................................................................................................................................................................................................................. 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 General test conditions .................................................................................................................................................................... 2

4.3 High pressure pump ........................................................................................................................................................................... 2

4.3.1 Method A ................................................................................................................................................................................. 2

4.3.2 Method B ................................................................................................................................................................................. 3

4.4 Injector ........................................................................................................................................................................................................... 3

4.5 Rail ..................................................................................................................................................................................................................... 3

4.6 High-pressure pipe (Table 5) ...................................................................................................................................................... 4

4.7 High-pressure sensor (Table 6) ................................................................................................................................................ 4

5 Analysis of particles .......................................................................................................................................................................................... 4

6 Reporting of the inspection results ................................................................................................................................................... 4

Annex A (informative) Comparison of CCC (Component Cleanliness Code) to FIECC (Fuel

Injection Equipment Cleanliness Code) ....................................................................................................................................... 5

Bibliography ................................................................................................................................................................................................................................ 7

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 19724:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 34,

Vehicle propulsion, powertrain and powertrain fluids.

This second edition cancels and replaces the first edition (ISO 19724:2016), of which it constitutes a

minor revision. The main changes compared to the previous edition are as follows:

— The reporting of the inspection results (Clause 6) changed from FIECC (Fuel Injection Equipment

Cleanliness Code, as in ISO 12345:2013) to CCC (Component Cleanliness Code, as in ISO 16232);

— The references to different parts of the ISO 16232 series have been modified to the newest edition:

ISO 16232:2018.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 19724:2020(E)
Introduction

Modern fuel injection systems contain many closely controlled clearances and rely on the fuel-flowing

characteristics of small orifices. Thus, they require the close control of sources of contamination in

order to maintain the operational performance demanded of them throughout their design life. To this

end, such systems are designed with integral fuel-filtration equipment, which reduces the amount of

potentially damaging debris that could enter the system from external sources.

However, contamination of the fuel injection system can also occur internally, from system use or

wear, from equipment servicing, or as a result of the original supplier’s manufacturing and assembly

processes. The focus of this document is on the latter source of contamination and is thus concerned

with the assessment of the cleanliness of the fuel injection equipment as originally supplied to the

engine manufacturer.

Fuel injection systems comprise a number of components. These are the low-pressure elements (fuel

tank, pipework, filters, lift pump, etc.), a high-pressure fuel pump, a high-pressure pipe, a fuel rail with

a high pressure sensor and fuel injectors.

During the preparation of this document, the importance of care in the handling and measurement

of contamination samples was clearly recognized. Moreover, the low levels of contaminant with fuel

injection equipment make this a particularly difficult task. For this document to be used meaningfully

as an indicator of component cleanliness and a driver towards higher quality standards, extreme

attention to detail is required of the user. Verification requirements for the test equipment used are

therefore emphasized. Helpful standards for appropriate conditions and handling are given in the

bibliography.

It is not always clear what level of cleanliness is sufficient for rated performance and life time on a cost-

effective basis. The actual quantitative levels can only be set in relation to other parameters, agreed

between the manufacturer, supplier and user. This document provides a set of procedures for evaluating

the cleanliness of fuel injection equipment and a framework for a common measurement and reporting.

© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 19724:2020(E)
Gasoline engines with direct injection — Cleanliness
assessment of fuel injection equipment

WARNING — Application of this document may involve the use of hazardous materials, operations

and equipment. This document does not purport to
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 19724
ISO/TC 22/SC 34
Gasoline engines with direct
Secretariat: ANSI
injection — Cleanliness assessment of
Voting begins on:
2020­03­02 fuel injection equipment
Voting terminates on:
Moteurs à essence — Evaluation de propreté pour équipement
2020­04­27
d'injection de combustible
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 19724:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2020
---------------------- Page: 1 ----------------------
ISO/FDIS 19724:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH­1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 19724:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Procedures .................................................................................................................................................................................................................. 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 General test conditions .................................................................................................................................................................... 2

4.3 High pressure pump ........................................................................................................................................................................... 2

4.3.1 Method A ................................................................................................................................................................................. 2

4.3.2 Method B ................................................................................................................................................................................. 3

4.4 Injector ........................................................................................................................................................................................................... 3

4.5 Rail ..................................................................................................................................................................................................................... 3

4.6 High­pressure pipe (Table 5) ...................................................................................................................................................... 4

4.7 High­pressure sensor (Table 6) ................................................................................................................................................ 4

5 Analysis of particles .......................................................................................................................................................................................... 4

6 Reporting of the inspection results ................................................................................................................................................... 4

Annex A (informative) Comparison of CCC (Component Cleanliness Code, ISO 16232) to

FIECC (Fuel Injection Equipment Cleanliness Code, ISO 12345:2013) ........................................................5

Bibliography ................................................................................................................................................................................................................................ 7

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 19724:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non­governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 34,

Vehicle propulsion, powertrain and powertrain fluids.

This second edition cancels and replaces the first edition (ISO 19724:2016), of which it constitutes a

minor revision. The main changes compared to the previous edition are as follows:

— The reporting of the inspection results (Clause 6) changed from FIECC (Fuel Injection Equipment

Cleanliness Code, as in ISO 12345:2013) to CCC (Component Cleanliness Code, as in ISO 16232);

— The references to different parts of the ISO 16232 series have been modified to the newest edition:

ISO 16232:2018.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/FDIS 19724:2020(E)
Introduction

Modern fuel injection systems contain many closely controlled clearances and rely on the fuel-flowing

characteristics of small orifices. Thus, they require the close control of sources of contamination in

order to maintain the operational performance demanded of them throughout their design life. To this

end, such systems are designed with integral fuel-filtration equipment, which reduces the amount of

potentially damaging debris that could enter the system from external sources.

However, contamination of the fuel injection system can also occur internally, from system use or

wear, from equipment servicing, or as a result of the original supplier’s manufacturing and assembly

processes. The focus of this document is on the latter source of contamination and is thus concerned

with the assessment of the cleanliness of the fuel injection equipment as originally supplied to the

engine manufacturer.

Fuel injection systems comprise a number of components. These are the low-pressure elements (fuel

tank, pipework, filters, lift pump, etc.), a high pressure fuel pump, a high-pressure pipe, a fuel rail with a

high pressure sensor and fuel injectors.

During the preparation of this document, the importance of care in the handling and measurement

of contamination samples was clearly recognized. Moreover, the low levels of contaminant with fuel

injection equipment make this a particularly difficult task. For this document to be used meaningfully

as an indicator of component cleanliness and a driver towards higher quality standards, extreme

attention to detail is required of the user. Verification requirements for the test equipment used are

therefore emphasized. Helpful standards for appropriate conditions and handling are given in the

bibliography.

It is not always clear what level of cleanliness is sufficient for rated performance and life time on a cost-

effective basis. The actual quantitative levels can only be set in relation to other parameters, agreed

between the manufacturer, supplier and user. This document provides a set of procedures for evaluating

the cleanliness of fuel injection equipment and a framework for a common measurement and repo

...

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