ISO 15500-7:2015

Road vehicles — Compressed natural gas (CNG) fuel system components — Part 7: Gas injector

ISO 15500-7:2015 specifies tests and requirements for the gas injector and/or fuel rail, a compressed natural gas fuel system component intended for use on the types of motor vehicles defined in ISO 3833. ISO 15500-7:2015 is applicable to vehicles using natural gas in accordance with ISO 15403‑1 (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[1]] 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. [1] 1 bar = 0,1 MPa = 105 Pa 1 MPa = 1 N/mm2

Véhicules routiers — Composants des systèmes de combustible gaz naturel comprimé (GNC) — Partie 7: Injecteur de gaz

General Information

• Status: Published
• Publication Date: 29-Nov-2015
• 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 3 - Fuel system components and refuelling connector for vehicles propelled by gaseous fuel
• Current Stage: 9092 - International Standard to be revised
• Completion Date: 14-Feb-2023

Relations

• Revises: ISO 15500-7:2002 - Road vehicles — Compressed natural gas (CNG) fuel system components — Part 7: Gas injector
• Effective Date: 13-Aug-2011

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 15500-7
Second edition
2015-12-01
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 15500-7:2015(E)
©
ISO 2015

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ISO 15500-7:2015(E)

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© ISO 2015, Published in Switzerland
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ii © ISO 2015 – All rights reserved

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ISO 15500-7:2015(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Marking . 2
5 Construction and assembly . 2
6 Tests . 3
6.1 Applicability . 3
6.2 Pneumatic strength . 3
6.3 Continued operation . 3
6.3.1 Bench durability . 3
6.3.2 Temperature . 4
6.4 Insulation resistance . 5
Bibliography . 6
© ISO 2015 – All rights reserved iii

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ISO 15500-7:2015(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
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electrotechnical standardization.
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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
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Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 41, Specific
aspects for gaseous fuels.
This second edition cancels and replaces the first edition (ISO 15500-7:2002), which has been
technically revised.
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)
iv © ISO 2015 – All rights reserved

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ISO 15500-7:2015(E)

— Part 14: Excess flow valve
— Part 15: Gas-tight housing and ventilation hose
— Part 16: Rigid fuel line in stainless steel
— Part 17: Flexible fuel line
— Part 18: Filter
— Part 19: Fittings
— Part 20: Rigid fuel line in material other than stainless steel
© ISO 2015 – All rights reserved v

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INTERNATIONAL STANDARD ISO 15500-7:2015(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 and/or fuel rail, 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 15403-1
(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
...