1、Methods of test for full-flow lubricating oil filters for internal combustion enginesPart 12: Filtration efficiency using particle counting and contaminant retention capacityBS ISO 4548-12:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 ISO 2017Methods of test f
2、or full-flow lubricating oil filters for internal combustion engines Part 12: Filtration efficiency using particle counting and contaminant retention capacityMthodes dessai des filtres huile de lubrification plein dbit pour les moteurs combustion interne Partie 12: Efficacit de filtration par compta
3、ge des particules et capacit de rtention des contaminantsINTERNATIONAL STANDARDISO4548-12Second edition2017-05Reference numberISO 4548-12:2017(E)National forewordThis British Standard is the UK implementation of ISO 4548-12:2017. The UK participation in its preparation was entrusted to Technical Com
4、mittee MCE/21/6, Filters for volatile liquid fuels and lubricating oils.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. Users are responsible for its correct app
5、lication. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 88924 0ICS 27.020Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Commi
6、ttee on 31 July 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 4548-12:2017 ISO 2017Methods of test for full-flow lubricating oil filters for internal combustion engines Part 12: Filtration efficiency using particle counting and contaminant retention capa
7、cityMthodes dessai des filtres huile de lubrification plein dbit pour les moteurs combustion interne Partie 12: Efficacit de filtration par comptage des particules et capacit de rtention des contaminantsINTERNATIONAL STANDARDISO4548-12Second edition2017-05Reference numberISO 4548-12:2017(E)BS ISO 45
8、48-12:2017ISO 4548-12:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, inclu
9、ding 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 in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel.
10、+41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 4548-12:2017ISO 4548-12:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilize
11、d 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 in the country of the requester.ISO copyright o
12、fficeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgISO 4548-12:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Symbols 25 Test equipment and materials . 25.1 Test equip
13、ment . 25.1.1 Test rig 25.1.2 Online dilution and particle counting system . 45.1.3 Timer 55.2 Test materials . 55.2.1 Test contaminant . 55.2.2 Test fluid 56 Accuracy of measuring instruments and test conditions . 57 Test rig validation 67.1 Validation of filter test circuit. 67.2 Validation of con
14、taminant injection circuit 67.3 Validation of online dilution and particle counting system . 78 Preliminary preparation 78.1 Test filter assembly . 78.2 Contaminant injection circuit . 78.3 Filter test circuit . 99 Test procedure 99.1 Initial measurement . 99.2 Performance test 1110 Calculations and
15、 report of test results1210.1 Calculations . 1210.1.1 General. 1210.1.2 Gravimetric levels 1210.1.3 Filtration efficiencies.1310.1.4 Micrometer ratings .1310.1.5 Injected mass of contaminant 1410.1.6 Non-retained mass of contaminant 1410.1.7 Retained filter capacity .1410.2 Test report 14Annex A (no
16、rmative) Specification of test fluid for oil filter test .15Annex B (informative) Typical filter test report 16Annex C (normative) Filter efficiency calculations 22Annex D (informative) Round robin exercise .25Bibliography .32 ISO 2017 All rights reserved iiiContents PageBS ISO 4548-12:2017ISO 4548-
17、12:2017(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. Each member body interested in a subject for
18、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 International Electrotechnical Commission (IEC) on al
19、l 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 different types of ISO documents should be noted. Th
20、is 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 not be held responsible for identifying any
21、 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 information given for the convenience of
22、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 Technical Barriers to Trade (TBT) see the followi
23、ng URL: www .iso .org/ iso/ foreword .html.The committee responsible for this document is ISO/TC 70, Internal combustion engines, Subcommittee SC 7, Tests for lubricating oil filters.This second edition cancels and replaces the first edition (ISO 4548-12:2000), which has been technically revised.A l
24、ist of all parts in the ISO 4548 series can be found on the ISO website.iv ISO 2017 All rights reservedBS ISO 4548-12:2017ISO 4548-12:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepar
25、ing 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. International organizations, governmental and non-governmental, in li
26、aison 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 for its further maintenance are described in the ISO/IEC Di
27、rectives, 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 .org/ directives).Attention is drawn to the possibility th
28、at 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 in the Introduction and/or on the ISO list of patent d
29、eclarations 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 related to conformity assessment, as well as informa
30、tion about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.The committee responsible for this document is ISO/TC 70, Internal combustion engines, Subcommittee SC 7, Tests for lubricatin
31、g oil filters.This second edition cancels and replaces the first edition (ISO 4548-12:2000), which has been technically revised.A list of all parts in the ISO 4548 series can be found on the ISO website.iv ISO 2017 All rights reserved ISO 4548-12:2017(E)IntroductionISO 4548 establishes standard test
32、 procedures for measuring the performance of full-flow lubricating oil filters for internal combustion engines. It has been prepared in separate parts, each part relating to a particular performance characteristic.Together, the tests provide the information necessary to assess the characteristics of
33、 a filter, but if agreed between the purchaser and the manufacturer, the tests may be conducted separately. ISO 2017 All rights reserved vBS ISO 4548-12:2017BS ISO 4548-12:2017Methods of test for full-flow lubricating oil filters for internal combustion engines Part 12: Filtration efficiency using p
34、article counting and contaminant retention capacity1 ScopeThis document specifies a multi-pass filtration test with continuous contaminant injection and using the online particle counting method for evaluating the performance of full-flow lubricating oil filters for internal combustion engines. The
35、scope of this document is limited to steady state conditions and does not address fluctuations in the flow rate.The test procedure determines the contaminant capacity of a filter, its particulate removal characteristics and differential pressure.This test is intended for application to filter elemen
36、ts with an efficiency of less than 99 % at particle size greater than 10 m.NOTE Several test flow loops built into one test rig, or several test rigs, would be necessary to cover the complete flow range of 2 l/min to 600 l/min.2 Normative referencesThe following documents are referred to in the text
37、 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) applies.ISO 2942, Hydraulic fluid power Filter elements V
38、erification of fabrication integrity and determination of the first bubble pointISO 3968, Hydraulic fluid power Filters Evaluation of differential pressure versus flow characteristicsISO 4021, Hydraulic fluid power Particulate contamination analysis Extraction of fluid samples from lines of an opera
39、ting systemISO 4405, Hydraulic fluid power Fluid contamination Determination of particulate contamination by the gravimetric methodISO 11171, Hydraulic fluid power Calibration of automatic particle counters for liquidsISO 11943, Hydraulic fluid power On-line automatic particle-counting systems for l
40、iquids Methods of calibration and validationISO 12103-1:2016, Road vehicles Test contamintants for filter evaluation Part 1: Arizona test dust3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 11841-1 and ISO 11841-2 and the following apply.INTERNATIONAL
41、 STANDARD ISO 4548-12:2017(E) ISO 2017 All rights reserved 1BS ISO 4548-12:2017ISO 4548-12:2017(E)ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: avail
42、able at h t t p :/ www .iso .org/ obp3.1multi-pass testtest which requires the recirculation of unfiltered fluid through the filter element3.2base upstream gravimetric levelupstream contaminant concentration if no contaminant is recirculated3.3filtration efficiencyability of the filter to retain par
43、ticles expressed as the percentage of particles of a given size retained by the filter under test3.4overall efficiencyefficiency calculated from the average upstream and downstream particle counts 3.5X % micrometer (m) ratingparticle size corresponding to an overall efficiency of a given percentage
44、XNote 1 to entry: The unit given in m should be in accordance with data presentation expressed in ISO 11171.4 SymbolsThe graphical symbols used in this document are in accordance with ISO 1219-1.5 Test equipment and materials5.1 Test equipment5.1.1 Test rig5.1.1.1 Generality The test rig is shown di
45、agrammatically in Figure 1. It shall comprise a filter test circuit and a contaminant injection circuit, as described in 5.1.1.2 and 5.1.1.3.5.1.1.2 Filter test circuitThe filter test circuit shall include the following components:a) reservoir (1) constructed with a conical bottom having an included
46、 angle of not more than 90 degrees and where the oil entering is diffused below the fluid surface;b) oil pump (2) which does not alter the contaminant particle size distribution and which does not exhibit excessive flow pulses;c) device, such as a filter head to accommodate spin-on filters, to conne
47、ct the test filter (6) which can be by-passed or replaced by a straight section of the pipe;d) system clean-up filter (9) capable of providing an initial system contamination level of less than 15 particles greater than 10 m/ml;2 ISO 2017 All rights reservedBS ISO 4548-12:2017ISO 4548-12:2017(E)ISO
48、and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp3.1multi-pass testtest which requires the recirculation of unfilt
49、ered fluid through the filter element3.2base upstream gravimetric levelupstream contaminant concentration if no contaminant is recirculated3.3filtration efficiencyability of the filter to retain particles expressed as the percentage of particles of a given size retained by the filter under test3.4overall efficiencyefficiency calculated from the average upstream and downstream particle counts 3.5X % micrometer (m) ratingparticle size corresponding to an overall efficiency of a give
