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1、BRITISH STANDARD BS ISO 12156-2:1998 Diesel fuel Assessment of lubricity using the high-frequency reciprocating rig (HFRR) Part 2: Limit ICS 75.160.20 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 06:06:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12156-2:1998 This British Standard,
2、 having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 January 1999 BSI 05-1999 ISBN 0 580 30984 3 National foreword This British Standard reproduces verbatim ISO 12156-2:1998 and impleme
3、nts it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MCE/22, Engines for road vehicles, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the
4、interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standard
5、s which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard d
6、oes not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an in
7、side front cover, pages i and ii, the ISO title page, pages ii to iv, page 1 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Am
8、d. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 06:06:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12156-2:1998 BSI 05-1999i Contents Page National forewordInside front cover Forewordiii Text of ISO 12156-21 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 06:
9、06:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 06:06:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 06:06:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12156-2:1998 ii BSI 0
10、5-1999 Contents Page Forewordiii 1Scope1 2Normative reference1 3Test Method1 4Limit1 5Designation1 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 06:06:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12156-2:1998 BSI 05-1999iii Foreword ISO (the International Organization for Standardiz
11、ation) 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 established has the right to be
12、 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 standardization. Draft International S
13、tandards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 12156-2 was prepared jointly by Technical Committees ISO/TC 22, Roa
14、d vehicles, Subcommittee SC 7; Injection equipment and filters for use on road vehicles and ISO/TC 28, Petroleum products and lubricants. ISO 12156 consists of the following parts, under the general title Diesel fuel Assessment of lubricity using the high-frequency reciprocating rig (HFRR): Part 1:
15、Test method; Part 2: Limit. Descriptors: Diesel engines, automotive fuels, diesel fuels, lubrication, specifications, performance, lubricity, designation. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 06:06:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sh
16、effieldun, na, Mon Nov 27 06:06:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12156-2:1998 BSI 05-19991 1 Scope This part of ISO 12156 specifies the performance requirement (limit) necessary to ensure reliable operation of diesel fuel injection equipment with respect to lubrication by fuel of
17、 such equipment. It applies to fuels used in diesel engines. NOTEA variety of typical fuels was investigated prior to approval of this part of ISO 12156. However, it is not known whether the performance requirements specified in this part of ISO 12156 is appropriate for all additive/fuel combination
18、s. Additional work is underway to help predict the performance and future revisions of this part of ISO 12156 may be necessary once this work is complete. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this part of ISO
19、 12156. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this part of ISO 12156 are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and
20、ISO maintain registers of currently valid International Standards. ISO 12156-1:1997, Diesel fuel Assessment of lubricity using the high-frequency reciprocating rig (HFRR) Part 1: Test method. 3 Test method The test method for the assessment of diesel fuel lubricity to comply with the limit specified
21、 in this part of ISO 12156 shall be the method specified in ISO 12156-1. 4 Limit The performance requirement (limit) for diesel fuel in compliance with this part of ISO 12156 shall be a wear scar diameter corrected to a standardized water vapour pressure of 1,4 kPa (WS1,4) not greater than 460 4m. T
22、here may be additive/fuel combinations showing greater WS1,4 than that specified above which give acceptable performances. Such deviation from the standard, as well as any other non-compliance with the above-specified limit, requires mutual agreement of the fuel supplier and the engine/fuel injectio
23、n equipment manufacturer in written form. 5 Designation This part of ISO 12156 may be used to specify a lubricity requirement for diesel fuel. This requirement shall be designated as follows: Lubricity ISO 12156-2 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 06:06:21 GMT+00:00 2006, Uncont
24、rolled Copy, (c) BSI BS ISO 12156-2:1998 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by R
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32、eclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 06:06:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI