Diesel engines -- NOx reduction agent AUS 32

This document specifies the refilling interface for the NOx reduction agent AUS 32 in conformance with ISO 22241‑1, which is needed to operate converters with a selective catalytic reduction (SCR) exhaust treatment system. This document specifies the minimum functional and geometric requirements of an open refilling system, in order to ensure compatibility between the on-board refilling system and the off-board refilling system. Compatibility conditions for a sealed refilling system are provided in Annex A. This document applies to commercial vehicles and buses as defined in ISO 3833 and having a gross vehicle mass of more than 3,5 t, designed to use stationary off-board refilling systems. This document also applies to the nozzle of stationary off-board refilling systems. NOTE Throughout this document, the term "NOx reduction agent AUS 32" is abbreviated to "AUS 32".

Moteurs diesel -- Agent AUS 32 de réduction des NOx

General Information

Status
Published
Publication Date
11-Jul-2019
Current Stage
9092 - International Standard to be revised
Start Date
13-Dec-2020
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ISO 22241-4:2019 - Diesel engines -- NOx reduction agent AUS 32
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INTERNATIONAL ISO
STANDARD 22241-4
Second edition
2019-07
Diesel engines — NOx reduction agent
AUS 32 —
Part 4:
Refilling interface
Moteurs diesel — Agent AUS 32 de réduction des NOx —
Partie 4: Interface de remplissage
Reference number
ISO 22241-4:2019(E)
ISO 2019
---------------------- Page: 1 ----------------------
ISO 22241-4:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
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Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 22241-4:2019(E)
Contents Page

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

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

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

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

4 Requirements .......................................................................................................................................................................................................... 2

4.1 Functional requirements ................................................................................................................................................................ 2

4.2 Filler neck .................................................................................................................................................................................................... 4

4.3 Inlet adapter .............................................................................................................................................................................................. 5

4.4 Filler cap ....................................................................................................................................................................................................... 5

4.5 Filler nozzle ............................................................................................................................................................................................... 6

4.6 Minimum free space for refilling ............................................................................................................................................. 7

Annex A (normative) Compatibility conditions for sealed refilling systems ..........................................................10

Bibliography .............................................................................................................................................................................................................................13

© ISO 2019 – All rights reserved iii
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ISO 22241-4:2019(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 34,

Propulsion, powertrain and powertrain fluids.

This second edition of ISO 22241-4 cancels and replaces the first edition (ISO 22241-4:2009) which has

been technically revised. The main changes compared to the previous edition are as follows:

— the definition of AUS 32 has been deleted as it is included in ISO 22241-1 and the document is cited

normatively;
— new definitions have been added;

— the status of Annex A has been changed to normative and the Annex has been revised accordingly;

— Table 1 has been editorially and technically revised.
A list of all parts in the ISO 22241 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 2019 – All rights reserved
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INTERNATIONAL STANDARD ISO 22241-4:2019(E)
Diesel engines — NOx reduction agent AUS 32 —
Part 4:
Refilling interface
1 Scope

This document specifies the refilling interface for the NOx reduction agent AUS 32 in conformance with

ISO 22241-1, which is needed to operate converters with a selective catalytic reduction (SCR) exhaust

treatment system.

This document specifies the minimum functional and geometric requirements of an open refilling

system, in order to ensure compatibility between the on-board refilling system and the off-board

refilling system. Compatibility conditions for a sealed refilling system are provided in Annex A.

This document applies to commercial vehicles and buses as defined in ISO 3833 and having a gross

vehicle mass of more than 3,5 t, designed to use stationary off-board refilling systems. This document

also applies to the nozzle of stationary off-board refilling systems.

NOTE Throughout this document, the term “NOx reduction agent AUS 32” is abbreviated to “AUS 32”.

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 2575, Road vehicles — Symbols for controls, indicators and tell-tales

ISO 22241-1, Diesel engines — NOx reduction agent AUS 32 — Part 1: Quality requirements

ISO 22241-3, Diesel engines — NOx reduction agent AUS 32 — Part 3: Handling, transportation, and storage

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 22241-1 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
3.1
refilling system

off-board system and on-board system, including their refilling interface, for dispensing AUS 32 into the

on-board tank of the vehicle (3.12)
3.2
off-board refilling system

stationary equipment for dispensing AUS 32 into the on-board tank of the vehicle (3.12), consisting

typically of tank, pump, hose and filler nozzle (3.3)
© ISO 2019 – All rights reserved 1
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ISO 22241-4:2019(E)
3.3
filler nozzle

interfacing part of the off-board refilling system (3.2), which allows the operator to control the flow

of AUS 32 during the filling, consisting of a nozzle spout with a defined interface geometry and an

automatic shut-off system
3.4
on-board refilling system

equipment of the vehicle (3.12) necessary for refilling AUS 32 and consisting typically of an inlet adapter

(3.6), filler neck (3.5), filler cap (3.7) and tank
3.5
filler neck

interfacing part of the on-board refilling system (3.4) where the opening is formed by the inlet adapter

(3.6) to allow the tank to be refilled
3.6
inlet adapter

permanently fixed part of the filler neck (3.5), having a defined interface geometry and incorporating a

magnet ring for preventing misfiling of AUS 32 into the fuel tank
3.7
filler cap

part which is fitted to the filler neck (3.5) to prevent spillage (3.11) as well as to minimize contamination

of AUS 32, and which is temporarily opened or removed for refilling
3.8
open refilling system

universal refilling system (3.1) for which gas tightness between the filler nozzle (3.3) and the filler neck

(3.5) is not required

Note 1 to entry: The open refilling system permits refilling using a small volume container, for example.

3.9
sealed refilling system

specific refilling system (3.1) where the connection between the filler nozzle (3.3) and the filler neck

(3.5) is gas-tight
3.10
canister

container of size one to ten litres capacity, with spout, used to refill the on-board tank of the vehicle (3.12)

3.11
spillage

quantity of fluid that escapes from the filler nozzle (3.3) to the atmosphere after the nozzle has shut off

3.12
vehicle

commercial vehicle or bus as defined in ISO 3833 and having a gross vehicle mass of more than 3,5 t,

designed to use a stationary off-board refilling system (3.2)
4 Requirements
4.1 Functional requirements

The on-board refilling system and the off-board refilling system shall comply with the basic functional

requirements specified in Table 1. Fo
...

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