ISO 15500-7:2002

INTERNATIONAL ISO
STANDARD 15500-7
First edition
2002-09-01
Road vehicles — Compressed natural gas
(CNG) fuel system components —
Part 7:
Gas injector
Véhicules routiers — Composants des systèmes de combustible gaz
naturel comprimé (GNC) —
Partie 7: Injecteur de gaz

Reference number
ISO 15500-7:2002(E)
© ISO 2002

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ISO 15500-7:2002(E)
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ii ISO 2002 – All rights reserved

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ISO 15500-7:2002(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO 15500 may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO15500-7 was prepared by Technical Committee ISO/TC22, Road vehicles,
Subcommittee SC 25, Road vehicles using natural gas.
ISO 15500 consists of the following parts, under the general title Road vehicles — Compressed natural gas (CNG)
fuel system components:
— Part 1: General requirements and definitions
— Part 2: Performance and general test methods
— Part 3: Check valve
— Part 4: Manual valve
— Part 5: Manual cylinder valve
— Part 6: Automatic valve
— Part 7: Gas injector
— Part 8: Pressure indicator
— Part 9: Pressure regulator
— Part 10: Gas-flow adjuster
— Part 11: Gas/air mixer
— Part 12: Pressure relief valve (PRV)
— Part 13: Pressure relief device (PRD)
— Part 14: Excess flow valve
— Part 15: Gas-tight housing and ventilation hose
— Part 16: Rigid fuel line
— Part 17: Flexible fuel line
— Part 18: Filter
— Part 19: Fittings
©
ISO 2002 – All rights reserved iii

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INTERNATIONAL STANDARD ISO 15500-7:2002(E)
Road vehicles — Compressed natural gas (CNG) fuel system
components —
Part 7:
Gas injector
1 Scope
This part of ISO 15500 specifies tests and requirements for the gas injector, a compressed natural gas fuel system
component intended for use on the types of motor vehicles defined in ISO 3833.
This part of ISO 15500 is applicable to vehicles using natural gas in accordance with ISO 15403 (mono-fuel, bi-fuel
or dual-fuel applications). It is not applicable to injectors intended for high-pressure injection to the combustion
chamber, or to the following:
a) liquefied natural gas (LNG) fuel system components located upstream of, and including, the vaporizer;
b) fuel containers;
c) stationary gas engines;
d) container mounting hardware;
e) electronic fuel management;
f) refuelling receptacles.
NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of
this part of ISO 15500 and tested according to the appropriate functional tests.
NOTE 2 All references to pressure in this part of ISO 15500 are to be considered gauge pressures unless otherwise specified.
◦
NOTE 3 This part of ISO 15500 is based upon a service pressure for natural gas as fuel of 20 MPa [200 bar] settled at 15 C.
Other service pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, a 25 MPa
[250 bar] service pressure system will require pressures to be multiplied by 1,25.
5 2
NOTE4 1 bar= 0,1 MPa= 10 Pa; .1 MPa= 1 N/mm
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 15500. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 15500 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated referenc
...