07-30155222-DC.pdf
a Date: 24 September 2007 Origin: International Latest date for receipt of comments: 31 December 2007 Project no.: 2006/02340 Responsible committee: MCE/9 Ignition equipment for spark ignition engines Interested committees: Title: Draft BS ISO 28741: Road vehicles - Spark - plugs and their cylinder head housings - Basic characteristics and dimensions Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 December 2007. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf for information on commenting. 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Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsi-global.com. Direct tel: 020 8996 7009 Responsible Committee Secretary: Committee Service Centre (BSI) E-mail: cscbsi-global.com Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 7.0 DPC: 07/30155222 DC Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on international discussions in which the UK has taken an active part. Your comments on this draft are invited and will assist in the preparation of the consequent standard. Comments submitted will be reviewed by the relevant BSI committee before sending the consensus UK vote and comments to the international secretariat, which will then decide appropriate action on the draft and the comments received. If no comments are received to the contrary, then the UK will approve this draft. If the international standard is approved, it is possible the text will be published as an identical British Standard. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guidance given below is intended to ensure that all comments receive efficient and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the address given on the front cover. 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Amend to read . so that the mains connector to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation. Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH. IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS. RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION. DRAFT INTERNATIONAL STANDARD ISO/DIS 28741 © International Organization for Standardization, 2007 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION ISO/TC 22/SC 1 Voting begins on: 2007-09-25 Secretariat: DIN Voting terminates on: 2008-02-25 Road vehicles Spark-plugs and their cylinder head housings Basic characteristics and dimensions Véhicles routiers Bougies d'allumage et leurs logements dans la culasse Caractéristiques élémentaires et dimensions ICS 43.060.50 In accordance with the provisions of Council Resolution 15/1993 this document is circulated in the English language only. Conformément aux dispositions de la Résolution du Conseil 15/1993, ce document est distribué en version anglaise seulement. To expedite distribution, this document is circulated as received from the committee secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at publication stage. Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au Secrétariat central de l'ISO au stade de publication. Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 28741 ii© ISO 2007 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. 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Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 28741 © ISO 2007 All rights reserved iii Contents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions.1 4 Terminals3 4.1 Solid post terminal dimensions.3 4.2 Threaded terminal dimensions 3 5 Dimensions, threads and related items 4 5.1 Spark-plug reach.4 5.2 Gasket.4 5.3 Threads, limiting dimensions, tolerances.4 6 Other dimensions of spark-plugs and their cylinder head housings5 7 Installation tightening torque.6 8 Spark-plug dimensions.6 8.1 Spark-plugs with flat seating .6 8.2 Spark-plugs with conical seating 13 9 Cylinder head housings15 9.1 Cylinder head housing for spark-plugs with flat seating15 9.2 Cylinder head housing for spark-plugs with conical seating.16 Annex A (normative) Spark-plugs with half thread and their cylinder head housings .18 Annex B (informative) Optional terminals for compact spark-plugs.20 Annex C (informative) Optional combination cylinder head housing for spark-plugs with conical or flat seating.22 Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 28741 iv © ISO 2007 All rights reserved Foreword ISO (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 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 all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards 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. 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. ISO 28741 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 1, Ignition Equipment. This Standard will cancel and replace the following Standards, which have been introduced into this summary standard: ISO 1919, ISO 2344, ISO 2345, ISO 2346, ISO 2347, ISO 2704, ISO 2705, ISO 8470, ISO 14508, ISO 16246, ISO 19812 and ISO 22977. Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 28741 © ISO 2007 All rights reserved v Introduction The purpose of this standard is to provide a compact and concise specification on spark-plugs and their cylinder head housings, which shall replace the large number of existing single standards on each type of spark-plug. It is intended to specify the main properties, the design requirements and the dimensions of most of the existing types of spark-plugs and their cylinder head housings. It should enable the user to work with one comprehensive document valid for most types of spark-plugs instead of a number of standards each of them specified for one type only. It is intended to withdraw the following standards on spark-plugs and their cylinder head housing as soon as this standard is published: ISO 1919, ISO 2344, ISO 2345, ISO 2346, ISO 2347, ISO 2704, ISO 2705, ISO 8470, ISO 14508, ISO 16246, ISO 19812 and ISO 22977 Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI DRAFT INTERNATIONAL STANDARD ISO/DIS 28741 © ISO 2007 All rights reserved 1 1 Scope This International Standard specifies the main properties and dimensions of sparkplugs, including the terminals and the dimensions of their cylinder head housings, for use with sparkignition engines. Screened and waterproof spark-plugs (ISO 3412, ISO 3895 and ISO 3896) are not covered by this standard. 2 Normative references The following referenced documents are indispensable for the application 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 68-1: ISO General purpose screw threads Basic profile Part 1: Metric screw threads ISO 261: ISO general purpose metric screw threads - General plan ISO 965-1: ISO general purpose metric screw threads - Tolerances - Part 1: Principles and basic data ISO 965-3: ISO general purpose metric screw threads - Tolerances - Part 3: Deviations for constructional threads ISO 4095: Aerospace Bi-hexagonal drives - Wrenching configuration - Metric series ISO 3412: Road vehicles Screened and waterproof spark-plugs and their connections Types 1A and 1B ISO 3895: Road vehicles Screened and waterproof spark-plug and its connection Type 2 ISO 3896: Road vehicles Screened and waterproof spark-plug and its connection Type 3 ISO 6518-1: Road vehicles - Ignition systems - Part 1: Vocabulary ISO 11565: Road vehicles Spark-plugs Test methods and requirements 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 6518-1 and the following apply. 3.1 Installed height (dimension L) distance from the contact point of the cylinder head to the top of the spark-plug terminal, including the compressed gasket thickness with the spark-plug installed at the specified installation torque NOTE For conical seat the c
