1、BSI Standards PublicationBS ISO 12614-15:2014Road vehicles Liquefiednatural gas (LNG) fuel systemcomponentsPart 15: Capacitance fuel content gaugeBS ISO 12614-15:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO12614-15:2014.The UK participation in its prepa
2、ration was 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 responsi
3、ble for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 77162 0ICS 43.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Pol
4、icy and Strategy Committee on 31 July 2014.Amendments issued since publicationDate Text affectedBS ISO 12614-15:2014 ISO 2014Road vehicles Liquefied natural gas (LNG) fuel system components Part 15: Capacitance fuel content gaugeVhicules routiers quipements pour vhicules utilisant le gaz naturel liq
5、ufi (GNL) comme combustible Partie 15: Jauge de capacitINTERNATIONAL STANDARDISO12614-15First edition2014-07-01Reference numberISO 12614-15:2014(E)BS ISO 12614-15:2014ISO 12614-15:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specifi
6、ed, 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 ISOs
7、 member body 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 12614-15:2014ISO 12614-15:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv
8、1 Scope . 12 Normative references 13 Terms and definitions . 14 Marking 25 Construction and assembly . 26 Test 36.1 Applicability 36.2 Insulation resistance 3BS ISO 12614-15:2014ISO 12614-15:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national
9、 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. Internationa
10、l 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 fo
11、r 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.or
12、g/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
13、 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 terms and expressions
14、 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, Subcommittee SC 25, Vehicl
15、es 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 valve Part 5: Tank
16、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 13: Pressure control
17、 regulator Part 14: Differential pressure fuel content gauge Part 15: Capacitance fuel content gaugeiv ISO 2014 All rights reservedBS ISO 12614-15:2014ISO 12614-15:2014(E) Part 16: Heat exchanger vaporizer Part 17: Natural gas detector Part 18: Gas temperature sensor ISO 2014 All rights reserved vBS
18、 ISO 12614-15:2014BS ISO 12614-15:2014Road vehicles Liquefied natural gas (LNG) fuel system components Part 15: Capacitance fuel content gauge1 ScopeThis part of ISO 12614 specifies tests and requirements for the capacitance fuel content gauge, a liquefied natural gas fuel system component intended
19、for use on the types of motor vehicles defined in ISO 3833.This part of ISO 12614 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 the following:a) fuel containers;b) stationary gas engines;c) container
20、mounting hardware;d) electronic fuel management;e) refueling 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 12614 and tested according to the appropriate functional tests.NOTE 2 All references
21、 to pressure in this part of ISO 12614 are to be considered gauge pressures unless otherwise specified.NOTE 3 This part of ISO 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 appropriat
22、e factor (ratio). For example, 2 MPa (20 bar) working 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
23、the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 3833, Road vehicles Types Terms and definitionsISO 12614-1, Road vehicles Liquefied natural gas (LNG) fuel system components Part 1: General requirements and defini
24、tionsISO 12614-2, Road vehicles Liquefied natural gas (LNG) fuel system components Part 2: Performance and general test methods3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 12614-1 and the following apply.1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1N/mm2.
25、INTERNATIONAL STANDARD ISO 12614-15:2014(E) ISO 2014 All rights reserved 1BS ISO 12614-15:2014ISO 12614-15:2014(E)3.1capacitance fuel content gaugeassembly, covering the cables from the capacity sensor of the fuel tank, the capacity signal transmitter to standard electric signal, interconnecting cab
26、les, and the dash-board fuel content indicator3.2capacitance transmitterinstrument which transmits the measured capacity between two cables into a standard electric signal3.3fuel content indicatorgauge which shows the fuel content on the dial or display as received as electric signal4 MarkingMarking
27、 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) temperature range.The following additional markings are recommended.a) the direction of flow (when necessary
28、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 12614-15).NOTE This information can be provided by a suitable i
29、dentification code on at least one part of the component when it consists of more than one part.5 Construction and assembly5.1 The capacitance fuel content gauge consists of capacitance transmitter (placed next to the fuel tank), fuel content indicator (placed on the dash-board),NOTE A standard auto
30、motive type gauge calibrated to the transmitter. Not subject of tests within this standard ISO 12614-17. It is presumed that the indicator is certified according to the general automotive industry requirements. capacity transmission cables, and signal transmission cable.5.2 The function of the fuel
31、content gauge is to measure the electrical capacity between the fuel tank outer vessel and the cable from the inner vessel capacity level sensor. The function of the gauge is also to 2 ISO 2014 All rights reservedBS ISO 12614-15:2014ISO 12614-15:2014(E)transmit the measured capacity to an electric s
32、ignal to be sent to the fuel content indicator, e.g. 4 mA to 20 mA.5.3 The output of the capacitance fuel content gauge shall be joined with fuel content indicator on the dash-board. The gauge shall provide the signal compatible with the requirements of the fuel content indicator.6 Test6.1 Applicabi
33、lityThe tests required to be carried out are indicated in Table 1.Table 1 Tests applicableTest ApplicableTest procedure as required by ISO 12614-2Specific test requirements of this part of ISO 12614Hydrostatic strengthLeakageExcess torque resistance X XBending moment X XContinued operationCorrosion
34、resistance X XOxygen ageing X XElectrical overvoltages X XNon-metallic synthetic immersionVibration resistance X XBrass material compatibility X XInsulation resistance X X (see 6.2)Minimum opening voltage6.2 Insulation resistance6.2.1 This test is designed to check for a potential failure of the ins
35、ulation between the natural gas detectors connectors 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. ISO 2014 All rights reserved 3BS ISO 12614-15:2014ISO 12614-1
36、5:2014(E) ISO 2014 All rights reservedICS 43.060.40Price based on 3 pagesThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal Charter. British Standards an
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