1、BSI Standards PublicationBS ISO 15500-11:2015Road vehicles Compressednatural gas (CNG) fuel systemcomponentsPart 11: Gas/air mixerBS ISO 15500-11:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO15500-11:2015.The UK participation in its preparation was entru
2、sted to TechnicalCommittee GSE/40, Gas supply equipment for natural gas vehicles.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its corr
3、ectapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 79970 9ICS 43.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy
4、 Committee on 31 December 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 15500-11:2015 ISO 2015Road vehicles Compressed natural gas (CNG) fuel system components Part 11: Gas/air mixerVhicules routiers Composants des systmes de combustible gaz naturel comprim (G
5、NC) Partie 11: Mlangeur air/gazINTERNATIONAL STANDARDISO15500-11Second edition2015-12-01Reference numberISO 15500-11:2015(E)BS ISO 15500-11:2015ISO 15500-11:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise spec
6、ified, 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 I
7、SOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 15500-11:2015ISO 15500-11:2015(E)Foreword iv1 Scope . 12 Normative references 13 Terms and defi
8、nitions . 14 Marking 25 Construction and assembly . 26 Tests . 26.1 Applicability 26.2 Hydrostatic strength 36.3 Leakage 36.4 Continued operation 36.5 Corrosion resistance 3Bibliography 4 ISO 2015 All rights reserved iiiContents PageBS ISO 15500-11:2015ISO 15500-11:2015(E)ForewordISO (the Internatio
9、nal 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
10、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 standar
11、dization.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
12、 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 a
13、ny 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 endorsemen
14、t.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible
15、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 15500-11:2001), which has been technically revised.ISO 15500 consists of the following parts, under the general title Road vehicles Co
16、mpressed 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
17、 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 reservedBS ISO 15500-11:2015ISO 15500-11:2015(E) Part 14: Excess flow valve Part 15: Gas-tight housing and ventilation hose Part 16: Rigid fue
18、l 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 vBS ISO 15500-11:2015BS ISO 15500-11:2015Road vehicles Compressed natural gas (CNG) fuel system components Part 11: Gas
19、/air mixer1 ScopeThis part of ISO 15500 specifies tests and requirements for the gas/air mixer, 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
20、 15403-1 (mono-fuel, bi-fuel, or dual-fuel applications). It is not applicable 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 manag
21、ement;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 ar
22、e 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 a fuel of 20 MPa (200 bar1) settled at 15 C. Other service pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For ex
23、ample, a 25 MPa (250 bar) service pressure system will require pressures to be multiplied by 1,25.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited ap
24、plies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 15500-1, Road vehicles Compressed natural gas (CNG) fuel system components Part 1: General requirements and definitionsISO 15500-2, Road vehicles Compressed natural gas (CNG) fuel syst
25、em components Part 2: Performance and general test methods3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 15500-1 apply.1) 1 bar = 0,1 MPa = 105Pa; 1 MPa = 1 N/mm2.INTERNATIONAL STANDARD ISO 15500-11:2015(E) ISO 2015 All rights reserved 1BS ISO 15500-
26、11:2015ISO 15500-11:2015(E)4 MarkingMarking of the component shall provide sufficient information to allow the following to be traced:a) the manufacturers or agents name, trademark or symbol;b) the model designation (part number);c) the working pressure and temperature range.The following additional
27、 markings are recommended: the direction of flow (when necessary for correct installation); the type of fuel; electrical ratings (if applicable); the symbol of the certification agency; the type approval number; the serial number or date code; a reference to this part of ISO 15500.NOTE This informat
28、ion can be provided by a suitable identification code on at least one part of the component when it consists of more than one part.5 Construction and assemblyThe gas/air mixer shall comply with the applicable provisions of ISO 15500-1 and ISO 15500-2, and with the tests specified in Clause 6. Tolera
29、nces should follow the specifications of ISO 15500-2.6 Tests6.1 ApplicabilityThere are many types of gas/air mixers available. This part of ISO 15500 gives requirements for three different existing designs: positive and negative pressure venturi, which have no moving parts, and variable orifice. As
30、gas/air mixer designs vary, so will the tests required.The tests required to be carried out are indicated in Table 1.2 ISO 2015 All rights reservedBS ISO 15500-11:2015ISO 15500-11:2015(E)Table 1 Tests applicableTest Applicable Test procedure as re-quired by ISO 15500-2Specific test requirements of t
31、his part of ISO 15500Hydrostatic strengthXaX X (see 6.2)Leakage X X X (see 6.3)Excess torque resistanceBending momentContinued operationXbX X (see 6.4)Corrosion resistance X X X (see 6.5)Oxygen ageing X XOzone ageing X XHeat Ageing X XAutomotive Fluids X XElectrical over-voltagesNon-metallic materia
32、l immersion X XVibration resistance X XBrass material compatibility X XaGas/air mixers that have a working pressure of 0,1 MPa (1 bar) are not required to be strength tested.bGas/air mixers with no moving parts, or with parts that are only moved at the time of installation or servicing, are not requ
33、ired to be tested for continued operation.6.2 Hydrostatic strengthTest the gas/air mixer according to the procedure for testing hydrostatic strength specified in ISO 15500-2, at 4 times the working pressure, recommended by its manufacturer or 600 kPa, whichever is greater.6.3 LeakageTest the gas/air
34、 mixer at the temperatures of -40 C or -20 C ( as applicable), room temperature and 120 C; the minimum test pressure shall be either 1,25 times the working pressure or 150 kPa, whichever is greater.6.4 Continued operationIf the gas/air mixers components move repeatedly during engine operation, then
35、it shall undergo 100 000 cycles from minimum to maximum flow. At the completion of this test, the gas/air mixer shall comply with 6.3 at room temperature.The duration of each cycle shall be no less than 10 s.6.5 Corrosion resistanceIf materials or designs susceptible to corrosion are used in the com
36、ponent, then the corrosion resistance test as given in ISO 15500-2 shall be performed. ISO 2015 All rights reserved 3BS ISO 15500-11:2015ISO 15500-11:2015(E)Bibliography1 ISO 3833, Road vehicles Types Terms and definitions2 ISO 15403-1, Natural gas Natural gas for use as a compressed fuel for vehicl
37、es Part 1: Designation of the quality3 ISO/TR 15403-2, Natural gas - Natural gas for use as a compressed fuel for vehicles Part 2: Specification of the quality4 ISO 2015 All rights reservedBS ISO 15500-11:2015BS ISO 15500-11:2015ISO 15500-11:2015(E) ISO 2015 All rights reservedICS 43.060.40Price bas
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