ISO 22760-1:2019

Road vehicles — Dimethyl Ether (DME) fuel system components — Part 1: General requirements and definitions

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) — Partie 1: Exigences générales et définitions

General Information

• Status: Published
• Publication Date: 09-Dec-2019
• ICS: 43.060.40 - Fuel systems
• Technical Committee: ISO/TC 22/SC 41 - Specific aspects for gaseous fuels
• Drafting Committee: ISO/TC 22/SC 41/WG 8 - Fuel system components and refueling connector for vehicles propelled by Dimethyl Ether (DME)
• Current Stage: 6060 - International Standard published
• Start Date: 10-Dec-2019
• Due Date: 14-Dec-2020
• Completion Date: 10-Dec-2019

Standards Content (Sample)

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

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ISO 22760-1:2019(E)

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ii © ISO 2019 – All rights reserved

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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

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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

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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

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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

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ISO 22760-1:2019(E)

3.6
rail pressure control valve
RPCV
inlet metering valve
IMV
device wh
...