1、BSI Standards PublicationBS ISO 12614-17:2014Road vehicles Liquefiednatural gas (LNG) fuel systemcomponentsPart 17: Natural gas detectorBS ISO 12614-17:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO12614-17:2014.The UK participation in its preparation was
2、 entrusted 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 it
3、s correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 77164 4ICS 43.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and St
4、rategy Committee on 31 July 2014.Amendments issued since publicationDate Text affectedBS ISO 12614-17:2014 ISO 2014Road vehicles Liquefied natural gas (LNG) fuel system components Part 17: Natural gas detectorVhicules routiers quipements pour vhicules utilisant le gaz naturel liqufi (GNL) comme comb
5、ustible Partie 17: Dtecteur de gaz naturelINTERNATIONAL STANDARDISO12614-17First edition2014-07-01Reference numberISO 12614-17:2014(E)BS ISO 12614-17:2014ISO 12614-17:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part o
6、f 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 ISOs member body
7、in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 12614-17:2014ISO 12614-17:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv1 Scope . 12
8、Normative references 13 Terms and definitions . 14 Marking 25 Construction and assembly . 26 Test 26.1 Applicability 26.2 Insulation resistance 36.3 Minimum signalling voltage 3BS ISO 12614-17:2014ISO 12614-17:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide fed
9、eration 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 comm
10、ittee. 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 an
11、d 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, Par
12、t 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 t
13、he 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 on the meaning of ISO specific te
14、rms 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 for this document is ISO/TC 22, Road vehicles, Subcomm
15、ittee SC 25, Vehicles using gaseous fuels.ISO 12614 consists of the following parts, under the general title Road vehicles Liquefied natural gas (LNG) fuel system components: Part 1: General requirements and definitions Part 2: Performance and general test methods Part 3: Check valve Part 4: Manual
16、valve Part 5: Tank pressure gauge Part 6: Overpressure regulator Part 7: Pressure relief valve Part 8: Excess flow valve Part 9: Gas-tight housing and ventilation hose Part 10: Rigid fuel line in stainless steel Part 11: Fittings Part 12: Rigid fuel line in material other than stainless steel Part 1
17、3: Pressure control regulator Part 14: Differential pressure fuel content gauge Part 15: Capacitance fuel content gaugeiv ISO 2014 All rights reservedBS ISO 12614-17:2014ISO 12614-17:2014(E) Part 16: Heat exchanger vaporizer Part 17: Natural gas detector Part 18: Gas temperature sensor ISO 2014 All
18、rights reserved vBS ISO 12614-17:2014BS ISO 12614-17:2014Road vehicles Liquefied natural gas (LNG) fuel system components Part 17: Natural gas detector1 ScopeThis part of ISO 12614 specifies tests and requirements for the natural gas detector, a liquefied natural gas fuel system component intended f
19、or use on the types of motor vehicles defined in ISO 3833. This part of ISO 12614 is not applicable to the following:a) fuel containers;b) stationary gas engines;c) container mounting hardware;d) electronic fuel management;e) refueling receptacles.NOTE 1 It is recognized that miscellaneous component
20、s not specifically covered herein can be examined to meet the criteria of this part of ISO 12614 and tested according to the appropriate functional tests.NOTE 2 All references to pressure in this part of ISO 12614 are to be considered gauge pressures unless otherwise specified.NOTE 3 This part of IS
21、O 12614 is based upon a working pressure for natural gas as a fuel of 1,6 MPa 16 bar1). Other working pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, 2 MPa (20 bar) working pressure system will require pressures to be multiplied by 1,25.2 Norma
22、tive 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 applies. For undated references, the latest edition of the referenced document (including any amendments) a
23、pplies.ISO 3833, Road vehicles Types Terms and definitionsISO 12614-1, Road vehicles Liquefied natural gas (LNG) fuel system components Part 1: General requirements and definitionsISO 12614-2, Road vehicles Liquefied natural gas (LNG) fuel system components Part 2: Performance and general test metho
24、ds3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 12614-1 apply.1) 1 bar = 0,1 Mpa = 105 Pa; 1 MPa = 1 N/mm2.INTERNATIONAL STANDARD ISO 12614-17:2014(E) ISO 2014 All rights reserved 1BS ISO 12614-17:2014ISO 12614-17:2014(E)4 MarkingMarking of the comp
25、onent 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 or pressure and temperature range.The following additional markings are recommended.a) the direction
26、 of flow (when necessary for correct installation);b) the type of fuel;c) electrical ratings (if applicable);d) the symbol of the certification agency;e) the type approval number;f) the serial number or date code;g) reference to this part of ISO 12614 (i.e. ISO 12614-17).NOTE This information can be
27、 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 natural gas detector shall comply with the applicable provisions of ISO 12614-1 and ISO 12614-2 and with the tests specified in Clause 6 of this par
28、t of ISO 12614.5.1 The output of the natural gas detector shall be joined with signalization of increased concentration of methane on the dash-board. The sensor shall provide the signal at 10 % of the lower explosion limit (LEL). The ECU shall stop the delivery of fuel after 1 min from the signal if
29、 not quoted by the driver. When the signal is 20 % of the LEL, the automatic valve would stop the delivery after 1 min without any influence of the driver.In case of measuring 50 % of the LEL, the valve would be closed immediately.5.2 The output of the natural gas detector can be connected to the EC
30、U of the engine for blocking restart of the engine by the driver before the system inspection (optional).5.3 The gas detector shall not be exposed to the dirt of the traffic.6 Test6.1 ApplicabilityThe tests required to be carried out are indicated in Table 1.2 ISO 2014 All rights reservedBS ISO 1261
31、4-17:2014ISO 12614-17:2014(E)Table 1 Tests applicableTest ApplicableTest procedure as required by ISO 126142Specific test requirements of this part of ISO 12614Hydrostatic strengthLeakageExcess torque resistanceBending momentContinued operationCorrosion resistanceOxygen ageing X XElectrical overvolt
32、ages X XNon-metallic material immersion X XVibration resistance X XBrass material compatibilityInsulation resistance X X (see 6.2)Minimum signalling voltage X X (see 6.3)6.2 Insulation resistance6.2.1 This test is designed to check for a potential failure of the insulation between the natural gas de
33、tector electric connection and the housing.6.2.2 Apply 1 000 V d.c. between one of the connector pins and the housing of the natural gas detector for at least 2 s. The minimum allowable resistance shall be 240 k.6.3 Minimum signalling voltageThe minimum voltage at which the instrument shall produce
34、a warning signal at room temperature shall be 8 V for a 12 V system and 16 V for a 24 V system. ISO 2014 All rights reserved 3BS ISO 12614-17:2014ISO 12614-17:2014(E) ISO 2014 All rights reservedICS 43.060.40Price based on 3 pagesThis page deliberately left blankBSI is the national body responsible
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