1、BSI Standards PublicationBS ISO 13948-1:2015Diesel engines Fuel injection pumps and fuel injector low-pressure connectionsPart 1: Threaded connectionsBS ISO 13948-1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 13948-1:2015. The UK participation in its p
2、reparation was entrusted to TechnicalCommittee 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. Users are responsible for its co
3、rrect application. The British Standards Institution 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 83942 9 ICS 43.060.40 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and
4、Strategy Committee on 31 August 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 13948-1:2015 ISO 2015Diesel engines Fuel injection pumps and fuel injector low-pressure connections Part 1: Threaded connectionsMoteurs diesels Raccords basse pression pour pompes di
5、njection de combustible et porte-injecteurs de combustible complets Partie 1: Raccords filetsINTERNATIONAL STANDARDISO13948-1Second edition2015-08-15Reference numberISO 13948-1:2015(E)BS ISO 13948-1:2015ISO 13948-1:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Publishe
6、d 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, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission
7、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. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 13948-1:2015ISO 13948-1:2015(E)Forewo
8、rd ivIntroduction v1 Scope . 12 Normative references 13 Terms, definitions and symbols 13.1 Terms and definitions . 13.2 Symbols . 24 Connection designs and applications . 24.1 General . 24.2 Types of connection 24.2.1 Type A: banjo connection (see Figure 1) 24.2.2 Type B: O-ring seal connection (se
9、e Figure 2) . 24.2.3 Type C: compression seal connection (see Figure 3) . 24.2.4 Type D: internal rubber ring seal “flexible” connection (see Figure 4) 34.2.5 Type E: external rubber ring seal “flexible” connection (see Figure 5) 35 Dimensions and tolerances . 36 Designation 3Bibliography 9 ISO 2015
10、 All rights reserved iiiContents PageBS ISO 13948-1:2015ISO 13948-1:2015(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 te
11、chnical 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 close
12、ly 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 Directives, Part 1. In particular the different approval criteria ne
13、eded 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 that some of the elements of this document may be the subject of patent
14、 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 declarations received (see www.iso.org/patents).Any trade name used in
15、 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 information about ISOs adherence to the WTO principles in the Technical Barrier
16、s to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 34, Propulsion, powertrain, and powertrain fluids.This second edition cancels and replaces the first edition (ISO 13948-1:2000), which
17、has been technically revised. The following changes have been made: the tables and figures have been revised.ISO 13948 consists of the following parts, under the general title Diesel engines Fuel injection pumps and fuel injector low-pressure connections: Part 1: Threaded connections Part 2: Non-thr
18、eaded (push-on) connectionsiv ISO 2015 All rights reservedBS ISO 13948-1:2015ISO 13948-1:2015(E)IntroductionIt is recognized that a large variety of low-pressure connections for fuel injection pumps and injectors exist, using different sealing principles as well as designs. ISO 13948 attempts to pro
19、vide the user with a common set of preferred types.ISO 13948 is divided into two parts, covering threaded connections (ISO 13948-1) and non-threaded (push-on) connections (ISO 13948-2) for use with low-pressure fuel supply and return, boost air pressure and lubricating oil supply and return. ISO 201
20、5 All rights reserved vBS ISO 13948-1:2015BS ISO 13948-1:2015Diesel engines Fuel injection pumps and fuel injector low-pressure connections Part 1: Threaded connections1 ScopeThis part of ISO 13948 specifies dimensions and requirements for mechanical, threaded connections used on diesel fuel injecti
21、on pumps and fuel injectors for the connection of low-pressure fuel, lubrication oil or air supply.Five types of threaded connections (types A to E) are described in this part of ISO 13948. Type A is commonly used for both pumps and injectors, while types B to E are for diesel fuel injection pumps o
22、nly.NOTE Low-pressure connections to fuel filters are covered in other International Standards; see the Bibliography. High-pressure end-connections for pumps and injectors are covered in ISO 29742 Normative referencesThe following documents, in whole or in part, are normatively referenced in this do
23、cument and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 261, ISO general purpose metric screw threads General planISO 4288, Geometrical Product
24、 Specifications (GPS) Surface texture: Profile method Rules and procedures for the assessment of surface textureISO 6149-1, Connections for hydraulic fluid power and general use Ports and stud ends with ISO 261 metric threads and O-ring sealing Part 1: Ports with truncated housing for O-ring sealISO
25、 7876-1, Fuel injection equipment Vocabulary Part 1: Fuel injection pumpsISO 7876-2, Fuel injection equipment Vocabulary Part 2: Fuel injectorsISO 7876-3, Fuel injection equipment Vocabulary Part 3: Unit injectorsISO 7876-4, Fuel injection equipment Vocabulary Part 4: High-pressure pipes and end-con
26、nectionsISO 7876-5, Fuel injection equipment Vocabulary Part 5: Common rail fuel injection system3 Terms, definitions and symbols3.1 Terms and definitionsFor the purposes of this part of ISO 13948, the terms and definitions given in ISO 7876-1 to ISO 7876-5 apply.INTERNATIONAL STANDARD ISO 13948-1:2
27、015(E) ISO 2015 All rights reserved 1BS ISO 13948-1:2015ISO 13948-1:2015(E)3.2 SymbolsDTThread sizeD1Clearance diameter for mating connectionD2Major diameter for washer sealing faceD3Minor diameter for washer sealing face / cone diameterD4Pipe/seal bore diameterD5Connecting hole diameterT1Minimum de
28、pth of full thread formT2Tapping drill depthT3Pipe seat depth4 Connection designs and applications4.1 GeneralTables 1 to 5 indicate the preferred designs, sizes and key dimensions for three different low-pressure connection applications for fuel injection pumps and injectors: fuel: inlet, back-leaka
29、ge and any other fuel connection on pumps; lubrication oil: for use mainly with inline pumps that have a separate lubrication supply to the fuel feeding system; air: for the connection of an engine inlet pressure signal.Five different design principles are shown in Figures 1 to 5 (combined with typi
30、cal mating pipe end-connections) as types A to E. Types C and D have features in common with type A and therefore can be used as type A connections.4.2 Types of connection4.2.1 Type A: banjo connection (see Figure 1)This design uses external sealing washers each side of a “banjo” end-connection on t
31、he mating low-pressure pipe, the flow from which is usually directed at right angles to the plane of flow of the connection. The pipe end-connection is secured to the pump connection by means of a “banjo” bolt.The specified configuration on the housing site may be used for the adaption of a straight
32、 connector also.4.2.2 Type B: O-ring seal connection (see Figure 2)This design is based on a similar design contained in SAE J2244/1 (ISO 6149-1) and utilizes an O-ring seal on a cone provided on the pump connection, outboard of the connection thread.4.2.3 Type C: compression seal connection (see Fi
33、gure 3)The principle used in this design is compression sealing on a cone provided on the pump connection inboard of the connection thread.2 ISO 2015 All rights reservedBS ISO 13948-1:2015ISO 13948-1:2015(E)4.2.4 Type D: internal rubber ring seal “flexible” connection (see Figure 4)This type of conn
34、ection provides an internal sealing diameter, inboard of the connection thread, which is used in conjunction with a rubber sealing ring that is compressed by applying a torque to the pipe end-connection and is sealed by radial compression.4.2.5 Type E: external rubber ring seal “flexible” connection
35、 (see Figure 5)This type of connection provides a sealing face (radius and internal bore) external to the main body of the connection. This sealing face is used in conjunction with a rubber sealing ring (fitted around the mating pipe) that is axially compressed a fixed amount by the connecting nut.T
36、ype E is preferred to type B for flexible pipe fittings.5 Dimensions and tolerancesFor dimensions and tolerances for each of the five types of low-pressure connection, see Tables 1 to 5.The preferred size for each type of application is indicated by a cross ().Connection sizes shall be determined by
37、 the fuel injection system designer taking account of system flow rate requirements, standardization, cost and other factors.All threads are recommended to be of tolerance grade 6H / 6g (medium).6 DesignationConnections in accordance with this part of ISO 13948 shall be designated by the following e
38、lements:a) reference to this part of ISO 13948;b) the type of connection, in accordance with Figures 1 to 5 and Tables 1 to 5;c) the thread designation, in accordance with ISO 261.EXAMPLE A low-pressure fuel connection of type A with an M10 1,25 thread is designated as follows:ISO 13948-1 A M10 1,25
39、 ISO 2015 All rights reserved 3BS ISO 13948-1:2015ISO 13948-1:2015(E)Dimensions in millimetresSurface roughness in micrometres, measured according to ISO 4288a) Straight connectorb) Banjo connector c) Detail of portFigure 1 Type A connectionTable 1 Dimensions for type ADimensions in millimetresFuel
40、Oil Air Thread DTD2min.D3T1min. M6 1 13 6,5 0,3 7 M8 1 13 8,5 0,3 8 M8 1,25 13 8,5 0,3 8 M10 1 14 10,5 0,3 9 M10 1,25 16 10,5 0,3 8,3 M12 1,5 17 12,5 0,3 10 M14 1 18 14,5 0,3 10 M14 1,5 19 14,5 0,3 10 M16 1,5 22 16,5 0,3 12 M18 1,5 24 18,5 0,3 144 ISO 2015 All rights reservedBS ISO 13948-1:2015ISO 1
41、3948-1:2015(E)Dimensions in millimetresSurface roughness in micrometres, measured according to ISO 4288a) Schematic connection b) Detail of portFigure 2 Type B connectionTable 2 Dimensions for type BDimensions in millimetresFuel Oil Air Thread DTD1amin.D3+0,10T1min. M12 1,5 19 13,8 11,5 M14 1,5 21 1
42、5,8 11,5aSpotface dimension, if required. ISO 2015 All rights reserved 5BS ISO 13948-1:2015ISO 13948-1:2015(E)Dimensions in millimetresSurface roughness in micrometres, measured according to ISO 4288a) Schematic connection b) Detail of portKeya Type A Top Face sealing alternative permissible. See Fi
43、gure 1 and Table 1 for face details.b Sealing element.Figure 3 Type C connectionTable 3 Dimension for type CDimensions in millimetresFuel Oil Air Thread DTD30,3T1min.T30,1T20,2D40,1 M10 1 10,5 9 3,4 10,75 5,1 M12 1,5 12,5 10 3,2 11,1 8,13 M14 1,5 14,5 10 3,4 13,7 8,256 ISO 2015 All rights reservedBS
44、 ISO 13948-1:2015ISO 13948-1:2015(E)Dimensions in millimetresSurface roughness in micrometres, measured according to ISO 4288a) Schematic connection b) Detail of portKeya Type A Top Face sealing alternative permissible. See Figure 1 and Table 1 for face details.b Over unthreaded portion of bore.c Se
45、aling element.Figure 4 Type D connectionTable 4 Dimension for type DDimensions in millimetresFuel Oil Air Thread DTD30,3T1min.T30,1T20,2D40,1 M14 1,5 14,5 10 23,6 17, 5 8,5 ISO 2015 All rights reserved 7BS ISO 13948-1:2015ISO 13948-1:2015(E)Dimensions in millimetresSurface roughness in micrometres,
46、measured according to ISO 4288a) Schematic connection b) Detail of portKeya Sealing element.Figure 5 Type E connectionTable 5 Dimension for type EDimensions in millimetresFuel Oil Air Thread DTT1min.T20,2D50,1D40,13 M12 1,5 9 10,75 5,1 8,3 M14 1,5 10 11,1 8,13 9,86 M16 1,5 10 13,7 8,25 11,48 ISO 201
47、5 All rights reservedBS ISO 13948-1:2015ISO 13948-1:2015(E)Bibliography1 ISO 68-1, ISO general purpose screw threads Basic profile Part 1: Metric screw threads2 ISO 68-2, ISO general-purpose screw threads Basic profile Part 2: Inch screw threads3 ISO 262, ISO general purpose metric screw threads Sel
48、ected sizes for screws, bolts and nuts4 ISO 724, ISO general-purpose metric screw threads Basic dimensions5 ISO 965-1, ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data6 ISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for gen
49、eral purpose external and internal screw threads Medium quality7 ISO 1302, Geometrical Product Specifications (GPS) Indication of surface texture in technical product documentation8 ISO 2306, Drills for use prior to tapping screw threads9 ISO 2974, Diesel engines 60 degree female cones for high-press
