1、BS ISO 19724:2016Gasoline engines with directinjection Cleanlinessassessment of fuel injectionequipmentBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 19724:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 19724:2016.
2、The UK participation in its preparation was entrusted to Technical Committee MCE/22, Engines for road vehicles.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Us
3、ers are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 87053 8 ICS 43.060.40 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority
4、 of the Standards Policy and Strategy Committee on 30 November 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 19724:2016 ISO 2016Gasoline engines with direct injection Cleanliness assessment of fuel injection equipmentMoteurs essence Evaluation de propret pour
5、quipement dinjection de combustibleINTERNATIONAL STANDARDISO19724First edition2016-11-15Reference numberISO 19724:2016(E)BS ISO 19724:2016ISO 19724:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no
6、 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 membe
7、r 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 19724:2016ISO 19724:2016(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and defin
8、itions . 14 Procedures 24.1 General . 24.2 General test conditions 24.3 High pressure pump . 24.3.1 Method A . 24.3.2 Method B . 34.4 Injector . 34.5 Rail . 44.6 High pressure pipe . 44.7 High pressure sensor . 45 Analysis of particles 46 Reporting of results . 4Bibliography 5 ISO 2016 All rights re
9、served iiiContents PageBS ISO 19724:2016ISO 19724:2016(E)ForewordISO (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
10、. 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 Intern
11、ational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.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 diffe
12、rent 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.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
13、 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 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
14、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 related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technica
15、l Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 34, Vehicle propulsion, powertrain and powertrain fluids.iv ISO 2016 All rights reservedBS ISO 19724:2016ISO 19724:2016(E)Introducti
16、onModern fuel injection systems contain many closely controlled clearances and rely on the fuel-flowing characteristics of small orifices. Thus, they require the close control of sources of contamination in order to maintain the operational performance demanded of them throughout their design life.
17、To this end, such systems are designed with integral fuel-filtration equipment, which reduces the amount of potentially damaging debris that could enter the system from external sources.However, contamination of the fuel injection system can also occur internally, from system use or wear, from equip
18、ment servicing, or as a result of the original suppliers manufacturing and assembly processes. The focus of this document is on the latter source of contamination and is thus concerned with the assessment of the cleanliness of the fuel injection equipment as originally supplied to the engine manufac
19、turer.Fuel injection systems comprise a number of components. These are the low pressure elements (fuel tank, pipe-work, filters, lift pump, etc.), a high pressure fuel pump, a high-pressure pipe, a fuel rail with a high pressure sensor and fuel injectors.During the preparation of this document, the
20、 importance of care in the handling and measurement of contamination samples was clearly recognized. Moreover, the low levels of contaminant with fuel injection equipment make this a particularly difficult task. For this document to be used meaningfully as an indicator of component cleanliness and a
21、 driver towards higher quality standards, extreme attention to detail is required of the user. Verification requirements for the test equipment used are therefore emphasized. Helpful standards for appropriate conditions and handling are given in the bibliography.It is not always clear what level of
22、cleanliness is sufficient for rated performance and life time on a cost-effective basis. The actual quantitative levels can only be set in relation to other parameters, agreed between the manufacturer, supplier and user. This document provides a set of procedures for evaluating the cleanliness of fu
23、el injection equipment and a framework for a common measurement and reporting. ISO 2016 All rights reserved vBS ISO 19724:2016BS ISO 19724:2016Gasoline engines with direct injection Cleanliness assessment of fuel injection equipmentWARNING Application of this document may involve the use of hazardou
24、s materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and determine the applicable regulatory limitations prior to
25、 use.1 ScopeThis document specifies cleanliness assessment procedures for evaluating the amount of debris present on the clean side of the constituent parts of high pressure gasoline direct fuel injection systems. The presence of such debris could lead to a reduction in the systems operational perfo
26、rmance.While other International Standards (e.g. ISO 16232 series) relate to the cleanliness of different types of components used in road vehicle fluid circuits, this document focuses on the special procedures applied for the components of gasoline direct fuel injection systems.2 Normative referenc
27、esThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) appl
28、ies.ISO 3696, Water for analytical laboratory use Specification and test methodsISO 12345, Diesel engines Cleanliness assessment of fuel injection equipmentISO 14644-1, Cleanrooms and associated controlled environments Part 1: Classification of air cleanliness by particle concentrationISO 16232-3:20
29、07, Road vehicles Cleanliness of components of fluid circuits Part 3: Method of extraction of contaminants by pressure rinsingISO 16232-5:2007, Road vehicles Cleanliness of components of fluid circuits Part 5: Method of extraction of contaminants on functional test benchISO 16232-7, Road vehicles Cl
30、eanliness of components of fluid circuits Part 7: Particle sizing and counting by microscopic analysis3 Terms and definitionsNo terms and defitnions are listed in this document.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: avai
31、lable at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp INTERNATIONAL STANDARD ISO 19724:2016(E) ISO 2016 All rights reserved 1BS ISO 19724:2016ISO 19724:2016(E)4 Procedures4.1 GeneralAll tests shall be carried out in a clean laboratory environment. Fail
32、ure to achieve a satisfactory blank test level of contamination could indicate unsuitable control of test conditions. Clean room conditions according to ISO 14644-1, class 8, are recommended as a minimum for these procedures.The appropriate method to determine the required amount of fluid is by use
33、of an extraction curve, as described in ISO 16232-3:2007, 6.2 and ISO 16232-5:2007, 6.2 (see also ISO 16232-3:2007, Figure 1 and ISO 16232-3:2007, Figure 1). In order to avoid each laboratory finding a different amount of fluid to be required, a guideline for the volume is given here for each compon
34、ent.The blank tests described in ISO 16232-3:2007, 6.3 and ISO 16232-5:2007, 6.3, are important procedures to check the quality of the laboratory equipment and shall be carried out once a week.Before starting the test procedure, the outer surface of the component or assembly shall be thoroughly clea
35、ned by using a fluid like for the cleanliness assessment.This document covers the following components of the fuel injection equipment: high pressure pump; injector; rail; high pressure pipe; high pressure sensor.4.2 General test conditionsThe following conditions are valid for all the components of
36、 the injection equipment. Medium: Gasoline test fluid (hydrocarbon similar to gasoline).For such components which during the production process did not come into contact with hydrocarbons, deionised water according to ISO 3696, Grade 3 with detergent also is possible (e.g. for pipes, rails, high pre
37、ssure sensors). Temperature: Room temperature. Outlet pressure: Atmosphere. Pre filtration: 5 m. Contaminant filter: Cellulose filter 5 m to 8 m.4.3 High pressure pump4.3.1 Method AThis test method refers to ISO 16232-5. The test of the high pressure pump shall be carried out by operating the pump o
38、n a functional test bench close to the conditions of the engine. This concerns, for example, plunger stroke, driving frequency, fuel flow. The pump under test is assembled to a cam box and driven by an electric motor.2 ISO 2016 All rights reservedBS ISO 19724:2016ISO 19724:2016(E)Care shall be taken
39、 that no contamination from the outside surface of the connectors for fluid inlet and for fluid outlet is transferred to the fluid circuit.Inlet pressure Operation Fluid quantity Point of discharge0,5.2 MPa (absolute)Pump in operation300 rpm to 1 500 rpm steady-state1,8 l to 2,5 lOther quantities to
40、 be prov-en by extraction curve as per ISO 16232-5Pump high pressure outletMethod A is the preferred method for the high pressure pump.4.3.2 Method BIf Method A cannot be applied for any technical or economical reason, Method B shall be used. This test method refers to ISO 16232-3 with pressure rins
41、ing.Inlet pressure Operation Fluid quantity Point of discharge0,1.0,5 MPa (absolute)Flushing with help of a pump or of a syringe0,2 lOther quantities to be prov-en by extraction curve as per ISO 16232-3Pump high pressure outlet4.4 InjectorThe injector shall be operated by applying the electrical ene
42、rgising like at the engine. The resulting vibrations and pressure pulsations are considered to be essential for removing the contamination and bringing it out of the injector. The injection period (energising time) may be increased to about 90 % of the total cycle in order to get a high through flow
43、 to wash the particles out and to reach the required fluid quantity in an appropriate time.The flow direction shall be reverse to the injection direction (with the internal fuel filter removed) in order to ensure that the orifices of the injector will not retain any particles. Only for such types of
44、 injectors where the internal filter cannot be removed that the normal flow direction shall be applied.Inlet pressureOperation Fluid quantity Point of discharge0,5 20 MPa (absolute)Flushing from nozzle holes to injector inlet (reverse direction) with injector in operation (dynamic) with filter remov
45、ed. If filter cannot be removed, flushing in injection direction.Energising frequency: 1 000 min-1to 2 000 min1Energising time: approximately 90 % of the injection cycle1 l for “dry”ainjec-tors, 0,2 l for “wet”ainjectorsInjector inlet, inlet filter of injector removed. If filter cannot be removed, i
46、njector outlet.a“Dry” injectors did not see any fluid after being assembled, while “wet” injectors were tested with fluid. ISO 2016 All rights reserved 3BS ISO 19724:2016ISO 19724:2016(E)4.5 RailThe inlet and each of the outlets shall be engaged in the through flow one by one, with the other outlets
47、 closed.Inlet pressure Operation Fluid quantity Point of discharge0,1 0,5 MPa (absolute)Flushing with help of a pump or hand flushing by a syringe into each outlet, one by one, with the other outlets closed. Or, into the inlet and through all the outlets one by oneFlow for each outlet 0,3 l.Other qu
48、antities to be proven by ex-traction curve as per ISO 16232-3Inlet of the rail, respectively, the outlets one by one4.6 High pressure pipeInlet pressure Operation Fluid Quantity Point of discharge0,1 0,5 MPa (absolute)Flushing with help of pump or of syringe1 l Pipe endThis procedure may also be app
49、lied for the low pressure tube from the fuel filter to the high pressure pump.4.7 High pressure sensorInlet pressure Operation Fluid Quantity Subject of flushing Place of collectingAtmosphereFlushing with help of syringe0,1 lHigh pressure face and pressure portVessel5 Analysis of particlesThe analysis of the particles found on the filter shall be carried out according to ISO 16232-7.6 Reporting of resultsThe cleanliness of the components shall be designated by using either the Fuel Injection Equipm
