Diesel engines -- NOx reduction agent AUS 32

This document applies to diesel engine powered road vehicles using selective catalytic reduction (SCR) technology. It is primarily intended for use by passenger cars and light commercial vehicles including buses with a gross vehicle mass of not more than 3,5 t, but can also be used by vehicles with a gross vehicle mass of over 3,5 t. 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 selective catalytic reduction (SCR) exhaust treatment system. This document specifies the essential functional and geometric requirements of the refilling system in order to ensure compatibility between the on-board refilling system and the off-board refilling system. For light commercial vehicles and buses having a gross vehicle mass of not more than 3,5 t, the open refilling system specified in ISO 22241‑4 can be used. 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
04-Jul-2019
Current Stage
6060 - International Standard published
Start Date
21-May-2019
Completion Date
05-Jul-2019
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INTERNATIONAL ISO
STANDARD 22241-5
Second edition
2019-07
Diesel engines — NOx reduction agent
AUS 32 —
Part 5:
Refilling interface for passenger cars
Moteurs diesel — Agent AUS 32 de réduction des NOx —
Partie 5: Interface de remplissage pour voitures particulières
Reference number
ISO 22241-5:2019(E)
ISO 2019
---------------------- Page: 1 ----------------------
ISO 22241-5:2019(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.
ISO copyright office
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 22241-5:2019(E)
Contents Page

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

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

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

4.4 Clearance space ...................................................................................................................................................................................... 7

4.4.1 General...................................................................................................................................................................................... 7

4.4.2 Minimum clearance "Class A"................................................................................................................................ 7

4.4.3 Minimum clearance "Class B" ............................................................................................................................... 8

5 Testing ..........................................................................................................................................................................................................................10

5.1 General test requirements .........................................................................................................................................................10

5.2 Determination of spillage from nozzle ............................................................................................................................10

5.3 Determination of smell .................................................................................................................................................................10

5.3.1 General...................................................................................................................................................................................10

5.3.2 Preconditioning the system to establish constant test conditions ....................................11

5.3.3 Test procedure ................................................................................................................................................................11

5.4 Minimum strength of filler neck ...........................................................................................................................................12

5.4.1 General...................................................................................................................................................................................12

5.4.2 Testing simulating misuse ....................................................................................................................................12

5.4.3 Testing in axial direction ........................................................................................................................................13

Annex A (informative) Filler neck with ribs ..............................................................................................................................................15

Bibliography .............................................................................................................................................................................................................................16

© ISO 2019 – All rights reserved iii
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ISO 22241-5:2019(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 cancels and replaces the first edition (ISO 22241-5:2012) 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;
— new normative references have been added;
— 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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ISO 22241-5:2019(E)
Introduction

The refilling system specified in this document has been developed in accordance with passenger

vehicle manufacturer's specifications. The functional requirements include a filling system that has

minimal obtrusive odours, has minimal spill risk, limits pressure build-up and includes mismatch

prevention. The system should be designed to prevent the deleterious effects of AUS 32, including, but

not limited to, uncontrolled flow into gaps in body work with the potential to cause corrosion, smell

nuisance and crystal formation.
© ISO 2019 – All rights reserved v
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INTERNATIONAL STANDARD ISO 22241-5:2019(E)
Diesel engines — NOx reduction agent AUS 32 —
Part 5:
Refilling interface for passenger cars
1 Scope

This document applies to diesel engine powered road vehicles using selective catalytic reduction (SCR)

technology. It is primarily intended for use by passenger cars and light commercial vehicles including

buses with a gross vehicle mass of not more than 3,5 t, but can also be used by vehicles with a gross

vehicle mass of over 3,5 t.

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 selective catalytic reduction (SCR) exhaust

treatment system. This document specifies the essential functional and geometric requirements of the

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

board refilling system.

For light commercial vehicles and buses having a gross vehicle mass of not more than 3,5 t, the open

refilling system specified in ISO 22241-4 can be used.

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 vehicles
3.2
canister
bottle

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

© ISO 2019 – All rights reserved 1
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ISO 22241-5:2019(E)
3.3
off-board refilling system

stationary equipment for dispensing AUS 32 into the on-board tank of the vehicles, consisting typically

of storage tank, pump, hose and filler nozzle (3.5)
3.4
on-board refilling system

equipment of the vehicles necessary for refilling AUS 32 and consisting typically of filler neck (3.6), filler

cap (3.7) and on-board tank
3.5
filler nozzle

interfacing part of an off-board refilling system (3.3) 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
3.6
filler neck
interfacing part of the on-board refilling system (3.4)
3.7
filler cap

part fitted to the filler neck (3.6) to prevent spillage as well as to minimize contamination of AUS 32 and

which is temporarily opened or removed for refilling
3.8
spillage

quantity of fluid that escapes from the filler nozzle (3.5) to the atmosphere after the nozzle has shut off

4 Requirements
4.1 Functional requirements

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

functional requirements:
— minimal spillage;
— minimal smell nuisance;
— minimal pressure; and
— mismatching prevention.
The detailed requirements specified in Table 1 apply.
Details not specified are left to the manufacturer's choice.
Table 1 — Basic functional requirements
No. Characteristic Requirement Remark
1 Maximum flow 5 l/min ≤ x ≤ 10 l/min. Flow rates do not apply to:
rate range
— canister filling;
— production line filling.
2 © ISO 2019 – All rights reserved
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ISO 22241-5:2019(E)
Table 1 (continued)
No. Characteristic Requirement Remark

2 Automatic shut-off Automatic shut-off feature required. For example, a nozzle in conformance with

of filler nozzle The maximum amount of flow after EN 13012.
automatic stop shall be not more
than 50 ml.

3 Maximum filling The automatic shut-off system of High volume expansion of AUS 32 during

level in AUS 32 on- the nozzle shall be used to protect freezing (approx. 7 %).
board tank against filling above maximum level.
4 Spillage Less than 0,4 ml per refilling with For test procedure see 5.2
filler neck angle from the horizontal
≥ 30°.
5 Pressure in the At five seconds after starting the —
filler neck refilling process, the pressure in the
filler neck shall be not more than
±3 mbar. At the end of refilling pro-
cess, there shall be ambient pressure
in the filler neck.

6 Ventilation during The filler neck shall be used for venti- For test procedure see 5.3

refilling lation of the AUS 32 on-board tank.
During refilling, no more than
15 mg/l ammonia concentration
should be measured.
7 Operational tem- −30 °C to + 80 °C For specific regions, the temperature range
perature r
...

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