1、BRITISH STANDARD BS ISO 7026:1997 Diesel engines Screw-in injection nozzle holders, types20,21,21.1 and27 for pintle nozzle size “S1” type “B” ICS43.060.40BSISO7026:1997 This British Standard, havingbeen prepared under thedirection of the Engineering Sector Board, was published underthe authority of
2、 the Standards Board and comes into effect on 15 March 1998 BSI 04-1999 ISBN 0 580 29310 6 National foreword This British Standard reproduces verbatim ISO7026:1997 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MCE/22, Engi
3、nes 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 interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European devel
4、opments 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 Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catal
5、ogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their c
6、orrect 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 inside front cover, pages i and ii, theISO title page, pages ii to iv, pages1 to4 and abackcover. This standard has been update
7、d (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 Amd. No. Date CommentsBSISO7026:1997 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword iii Text of ISO
8、7026 1ii blankBSISO7026:1997 ii BSI04-1999 Contents Page Foreword iii 1 Scope 1 2 Dimensions and tolerances 1 3 Other specifications 1 Figure 1 Screw-in injection nozzle holder, type20 2 Figure 2 Screw-in injection nozzle holder, types21 and21.1 3 Figure 3 Screw-in injection nozzle holder, type27 4B
9、SISO7026:1997 BSI 04-1999 iii 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 interes
10、ted 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 C
11、ommission (IEC) on all matters of electrotechnical standardization. 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 least75% of the member bodies casting a vote. Interna
12、tional Standard ISO7026 was prepared by Technical Committee ISO/TC22, Road vehicles, Subcommittee SC7, Injection equipment and filters for use on road vehicles. This third edition cancels and replaces the second edition (ISO7026:1990), which has been revised to include injection nozzle holders of ty
13、pe21.1. Descriptors: Road vehicles, motor vehicles, internal combustion engines, diesel engines, fuel injectors, injection nozzle holders, form specifications, dimensions.iv blankBSISO7026:1997 BSI 04-1999 1 1 Scope This International Standard specifies dimensional requirements for the mounting of i
14、njection nozzle holders in compression-ignition (diesel) engines. The location of the fuel inlet and leak-off connections are not defined since they vary according to the particular application. This International Standard applies to screw-in injection nozzle holders of types20,21,21.1 and27. These
15、nozzle holders are used with the pintle nozzle size “S”, type “B”, specified in ISO2697 1) . 2 Dimensions and tolerances 2.1 Nozzle holders without heat shield 2.1.1 Nozzle holder, type20, “long” Injection nozzle holders of type20 with nozzle protrusion of1mm 0,2mm shall be as shown in Figure 1. 2.1
16、.2 Nozzle holder, types21 and21.1, “short” Injection nozzle holders of type21 and type21.1 with nozzle protrusion of13mm 0,2mm shall be as shown in Figure 2. 2.2 Nozzle holder with integral heat shield, type27 Injection nozzle holders of type27 with heat shield protrusion of14,1mm 0,2mm shall be as
17、shown in Figure 3. 3 Other specifications Dimensions and requirements not given in this International Standard are left to the discretion of the manufacturer. 1) ISO2697:1974, Road vehicles Fuels injection nozzles Size “S”.BSISO7026:1997 2 BSI 04-1999 Figure 1 Screw-in injection nozzle holder, type2
18、0BSISO7026:1997 BSI 04-1999 3 Figure 2 Screw-in injection nozzle holder, types21 and21.1BSISO7026:1997 4 BSI 04-1999 Figure 3 Screw-in injection nozzle holder, type27blankBSISO 7026:1997 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body resp
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