ISO/DIS 17447-1

Road Vehicles -- Glow-plugs with conical seating and their cylinder head housing

Véhicules routiers -- Bougies de préchauffage à fourreau et à siège conique et leur logement dans la culasse

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 17447-1
ISO/TC 22/SC 32 Secretariat: JISC
Voting begins on: Voting terminates on:
2020-10-28 2021-01-20
Road Vehicles — Glow-plugs with conical seating and their
cylinder head housing —
Part 1:
Basic characteristics and dimensions for metal-sheath-
type glow-plugs

Véhicules routiers — Bougies de préchauffage à fourreau et à siège conique et leur logement dans la

culasse —

Partie 1: Caractéristiques de base et dimensions des bougies de préchauffage à fourreau de type métallique

ICS: 43.060.50
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
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NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
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STANDARDS MAY ON OCCASION HAVE TO
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Reference number
NATIONAL REGULATIONS.
ISO/DIS 17447-1:2020(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
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PROVIDE SUPPORTING DOCUMENTATION. ISO 2020
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ISO/DIS 17447-1:2020(E)
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© ISO 2020

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ii © ISO 2020 – All rights reserved
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ISO/DIS 17447-1:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Dimensions and tolerances ....................................................................................................................................................................... 2

4.1 Threads – dimension limits and tolerances ................................................................................................................... 2

4.2 Glow-plugs .................................................................................................................................................................................................. 3

4.2.1 General...................................................................................................................................................................................... 3

4.2.2 Heating elements ............................................................................................................................................................. 4

4.2.3 Electrical connection .................................................................................................................................................... 4

4.2.4 Dimensions for M14, M12, M10, M9 and M8 glow-plugs ............................................................. 6

4.3 Cylinder head housing ...................................................................................................................................................................... 8

4.3.1 General...................................................................................................................................................................................... 8

4.3.2 Housing dimensions ..................................................................................................................................................... 8

5 Installation tightening torque ................................................................................................................................................................ 9

Annex A (normative) Pin terminal dimensions .....................................................................................................................................11

Annex B (informative) M8 x 1 glow-plugs with 10 mm hexagon and their cylinder head housing ..13

© ISO 2020 – All rights reserved iii
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ISO/DIS 17447-1:2020(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.

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 needed 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 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 this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 32,

Electrical and electronic components and general system aspects.

This second edition cancels and replaces the first edition (ISO 17447-1:2015), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— Table 1, 2, 4, 6, 7 include now additionally M9x1
— Figure A.1 includes now M9
A list of all parts in the ISO 17447 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
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ISO/DIS 17447-1:2020(E)
Introduction

The purpose of this document is to provide a compact and concise specification on glow-plugs and their

cylinder head housings, which shall replace the existing single standards on each type of glow-plugs.

It is intended to specify the main properties, the design requirements and the dimensions of most of the

existing types of glow-plugs and their cylinder head housings. It should enable the user to work with

one comprehensive document valid for most types of glow-plugs instead of a number of standards each

of them specified for one type only.

Part 1 covers basic characteristics and dimensions for metal-sheath-type glow-plugs. Part 2 covers

basic characteristics and dimensions for ceramic-sheath-type glow-plugs. Tests and requirements are

defined in Part 3 of this document.

It is intended to withdraw the following document on glow-plugs and their cylinder head housing as

soon as this standard is published:
ISO 6550-1, ISO 6550-2, ISO 6550-3, ISO 6550-4, ISO 7578.
© ISO 2020 – All rights reserved v
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DRAFT INTERNATIONAL STANDARD ISO/DIS 17447-1:2020(E)
Road Vehicles — Glow-plugs with conical seating and their
cylinder head housing —
Part 1:
Basic characteristics and dimensions for metal-sheath-
type glow-plugs
1 Scope

This part of the International Standard specifies the main properties and dimensions of metal-sheath-

type glow-plugs, including the terminals, and the dimensions of their cylinder head housings, for use

with diesel (compression ignition) engines.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 286-1, Geometrical product specifications (GPS) — ISO code system for tolerances on linear sizes —

Part 1: Basis of tolerances, deviations and fits

ISO 965-1, ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data

ISO 965-3, ISO general purpose screw threads — Tolerances — Part 3: Deviations for constructional threads

ISO 1101, Geometrical product specifications (GPS) — Geometrical tolerancing — Tolerances of form,

orientation, location and run-out

ISO 2768-2, General tolerances — Part 2: Geometrical tolerances for features without individual tolerance

indications

ISO 8092-1, Road vehicles — Connections for on-board electrical wiring harnesses — Part 1: Tabs for single-

pole connections — Dimensions and specific requirements

ISO 8092-4, Road vehicles — Connections for on-board electrical wiring harnesses — Part 4: Pins for single-

and multi-pole connections — Dimensions and specific requirements
3 Terms and definitions

For the purposes of this document, the following terms and definitions apply / the terms and definitions

given in [external document reference] and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
© ISO 2020 – All rights reserved 1
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ISO/DIS 17447-1:2020(E)
3.1
Nominal voltage
Voltage as marked on the housing of the glow-plug

Note 1 to entry: The nominal voltage of the glow-plug is generally not identical to the supply voltage of the

vehicle’s electrical system.
3.2
Test voltage
Voltage(s) applied to the glow-plug under test
4 Dimensions and tolerances
4.1 Threads – dimension limits and tolerances

The threads of glow-plugs and the corresponding tapped holes in cylinder heads shall be in accordance

with ISO 68-1, ISO 261, ISO 965-1 and ISO 965-3.

The tolerance class 6g shall be used for glow-plug threads. For existing designs, tolerance class 6e is

also permitted. New designs shall be to tolerance class 6g.

The thread in the corresponding tapped holes in the cylinder heads shall have tolerance class 6H.

The threads, dimension
...