Road vehicles -- Dimethyl Ether (DME) fuel system components

This document specifies general requirements and definitions of Dimethyl Ether (DME) fuel system components, intended for use on the types of motor vehicles defined in ISO 3833. It also provides general design principles and specifies requirements for instructions and marking. This document is applicable to vehicles (mono-fuel, bi-fuel or dual-fuel applications) using Dimethyl Ether in accordance with ISO 16861 and ASTM D7901. It is not applicable to the following: a) fuel containers; b) stationary gas engines; c) container mounting hardware; d) electronic fuel management; e) refuelling receptacles. NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of this document and tested according to the appropriate functional tests. NOTE 2 All references to pressure in this document are considered gauge pressures unless otherwise specified.

Véhicules routiers -- Composants des systèmes de combustible Diméthyle Ether (DME)

General Information

Status
Published
Publication Date
09-Dec-2019
Current Stage
6060 - International Standard published
Start Date
08-Nov-2019
Completion Date
10-Dec-2019
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ISO 22760-1:2019 - Road vehicles -- Dimethyl Ether (DME) fuel system components
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INTERNATIONAL ISO
STANDARD 22760-1
First edition
2019-12
Road vehicles — Dimethyl Ether
(DME) fuel system components —
Part 1:
General requirements and definitions
Véhicules routiers — Composants des systèmes de combustible
Diméthyle Ether (DME) —
Partie 1: Exigences générales et définitions
Reference number
ISO 22760-1:2019(E)
ISO 2019
---------------------- Page: 1 ----------------------
ISO 22760-1:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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
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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 2019 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 22760-1:2019(E)
Contents Page

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

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

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

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

4 Construction and assembly ....................................................................................................................................................................... 5

5 Electrical equipment and wiring ......................................................................................................................................................... 5

6 Instructions ................................................................................................................................................................................................................ 6

7 Marking .......................................................................................................................................................................................................................... 6

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

© ISO 2019 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 22760-1:2019(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 41,

Specific aspects for gaseous fuels.
A list of all parts in the ISO 22760 series can be found on the ISO website.

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 2019 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 22760-1:2019(E)
Road vehicles — Dimethyl Ether (DME) fuel system
components —
Part 1:
General requirements and definitions
1 Scope

This document specifies general requirements and definitions of Dimethyl Ether (DME) fuel system

components, intended for use on the types of motor vehicles defined in ISO 3833. It also provides

general design principles and specifies requirements for instructions and marking.

This document is applicable to vehicles (mono-fuel, bi-fuel or dual-fuel applications) using Dimethyl

Ether in accordance with ISO 16861 and ASTM D7901. It is not applicable to the following:

a) fuel containers;
b) stationary gas engines;
c) container mounting hardware;
d) electronic fuel management;
e) refuelling receptacles.

NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to

meet the criteria of this document and tested according to the appropriate functional tests.

NOTE 2 All references to pressure in this document are considered gauge pressures unless otherwise

specified.
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 22760 (all parts), Road vehicles — Dimethyl Ether (DME) fuel system components

ISO 6722-1, Road vehicles — 60 V and 600 V single-core cables — Part 1: Dimensions, test methods and

requirements for copper conductor cables

ISO 6722-2, Road vehicles — 60 V and 600 V single-core cables — Part 2: Dimensions, test methods and

requirements for aluminium conductor cables
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
© ISO 2019 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO 22760-1:2019(E)
3.1
valve
device by which the flow of a fluid may be controlled
3.1.1
manual valve
valve (3.1) which is operated manually
3.1.2
automatic valve
valve (3.1) which is not operated manually
3.1.3
automatic tank valve

automatic valve (3.1.2) rigidly fixed to the tank which controls the flow of Dimethyl Ether (3.10) out of

the tank to the fuel system
3.1.4
check valve

automatic valve (3.1.2) which allows Dimethyl Ether (3.10) to flow in only one direction

3.1.5
excess flow valve

automatic valve (3.1.2) which automatically shuts off, or limits, the Dimethyl Ether (3.10) flow when the

flow exceeds a set design value
3.1.6
manual tank valve
manual valve (3.1.1) rigidly fixed to the tank
3.1.7
pressure relief valve
PRV

self-closing device which opens to prevent a pre-determined pressure being exceeded

3.1.8
service valve
manual valve (3.1.1) which is closed only during vehicle maintenance
3.2
filter
protective device which removes foreign debris or substances from the gas stream
3.3
fitting
connector used in joining a piping, tubing, or hose system
3.4
flexible fuel line
flexible tubing or hose through which Dimethyl Ether (3.10) flows
3.5
rail pressure sensor
device which gives rail pressure feedback to electronic control unit (ECU)
2 © ISO 2019 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 22760-1:2019(E)
3.6
rail pressure control valve
RPCV
inlet metering valve
IMV
device wh
...

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