ISO 13948-1:2000
(Main)Diesel engines — Fuel injection pumps and fuel injector low-pressure connections — Part 1: Threaded connections
Diesel engines — Fuel injection pumps and fuel injector low-pressure connections — Part 1: Threaded connections
Moteurs diesels — Raccords basse pression pour pompes d'injection de combustible et porte-injecteurs de combustible complets — Partie 1: Raccords filetés
General Information
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 13948-1
First edition
2000-04-15
Diesel engines — Fuel injection pumps and
fuel injector low-pressure connections —
Part 1:
Threaded connections
Moteurs diesels — Raccords basse pression pour pompes d'injection de
combustible et porte-injecteurs de combustible complets —
Partie 1: Raccords filetés
Reference number
ISO 13948-1:2000(E)
©
ISO 2000
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ISO 13948-1:2000(E)
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ii © ISO 2000 – All rights reserved
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ISO 13948-1:2000(E)
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 3.
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 part of ISO 13948 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 13948-1 was prepared by Technical Committee ISO/TC 22, Road vehicles,
Subcommittee SC 7, Engine equipment and filters for use on road vehicles.
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-threaded (push-on) connections
© ISO 2000 – All rights reserved iii
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ISO 13948-1:2000(E)
Introduction
It 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. This International Standard attempts to provide 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.
iv © ISO 2000 – All rights reserved
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INTERNATIONAL STANDARD ISO 13948-1:2000(E)
Diesel engines — Fuel injection pumps and fuel injector
low-pressure connections —
Part 1:
Threaded connections
1 Scope
This part of ISO 13948 specifies requirements for mechanical, threaded connections used on diesel fuel injection
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 only.
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 2974.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 13948. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 13948 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 261:1998, ISO general-purpose metric screw threads — General plan.
1)
ISO 6149-1:— , Connections for fluid power and general use — Ports and stud ends with ISO 261 threads and
O-ring sealing — Part 1: Ports with O-ring seal in truncated housing.
ISO 7876-1, Fuel injection equipment — Vocabulary — Part 1: Fuel injection pumps.
ISO 7876-2, Fuel injection equipment — Vocabulary — Part 2: Fuel injectors.
ISO 7876-3, Fuel injection equipment — Vocabulary — Part 3: Unit injectors.
ISO 7876-4, Fuel injection equipment — Vocabulary — Part 4: High-pressure pipes and end-connections.
1) To be published. (Revision of ISO 6149-1:1993)
© ISO 2000 – All rights reserved 1
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ISO 13948-1:2000(E)
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this part of ISO 13948, the terms and definitions given in ISO 7876-1 to -4 apply.
3.2 Symbols
D Clearance diameter for mating connection
1
D Maximum diameter for washer sealing face
2
D Minimum diameter for washer sealing face
3
T Minimum depth of full thread form
1
4 Connection designs and applications
4.1 General
Tables 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-leakage and any other fuel connection on pumps;
� lubrication oil: for use mainly with inline pumps which 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 typical 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
...
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