ISO 22241-5:2019
(Main)Diesel engines — NOx reduction agent AUS 32 — Part 5: Refilling interface for passenger cars
Diesel engines — NOx reduction agent AUS 32 — Part 5: Refilling interface for passenger cars
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 — Partie 5: Interface de remplissage pour voitures particulières
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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 2019
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2019 – All rights reserved
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
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
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.
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
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
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 shal
...
Deleted: /FDIS
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Diesel engines — NOx reduction agent AUS 32 —Part 5: Refilling interface for passenger
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cars
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Moteurs diesel — Agent AUS 32 de réduction des NOx —
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Partie 5: Interface de remplissage pour voitures particulières
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Formatted: Font: 14 pt, Bold, English (U.S.)
Formatted: English (U.S.)
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). Deleted: 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
Deleted: www.iso.org/patents
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)
Deleted: www.iso.org/iso/foreword.html
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 Deleted: of ISO 22241‐5
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; Deleted: ,
— new definitions have been added; Deleted: ,
— new normative references have been added; Deleted: , and
— 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. Deleted: www.iso.org/members.html
Deleted:
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.
Deleted: FINAL DRAFT
INTERNATIONAL STANDARD ISO 22241-5:2019(E)
Deleted: /FDIS
Deleted:
Formatted: Font: 16 pt, Bold, Font
color: Blue
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.
Deleted:
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:
Deleted: http://www.electropedia.or
— IEC Electropedia: available at http://www.electropedia.org/
g/
— ISO Online browsing platform: available at https://www.iso.org/obp Deleted: https://www.iso.org/obp
3.1
refilling system
Deleted: /FDIS
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
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.
Deleted:
Details not specified are left to the manufacturer's choice.
Table 1 — Basic functional requirements
Deleted: 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 Automatic shut‐ Automatic shut‐off feature required. For example, a nozzle in conformance with
off of filler nozzle The maximum amount of flow after EN 13012.
Deleted: or UL number
automatic stop shall be not more
than 50 ml.
3 Maximum filling The automatic shut‐off system of the High volume expansion of AUS 32 during
level in AUS 32 nozzle shall be used to protect freezing (approx. 7 %).
on‐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
Deleted: +/‐
process, there shall be ambient
pressure in the filler neck.
6 Ventilation during The filler neck shall be used for For test procedure see 5.3
refilling ventilation of the AUS 32 on‐board
tank.
During refilling, no more than
15 mg/l ammonia concentration
should be measured.
−30 °C to + 80 °C
Deleted: —
7 Operational For specific regions, the temperature range
temperature specified may not be sufficient or excessive.
range In such cases, a wider or more narrow
for on‐board components
temperature range, representative of that
−20 °C to + 40 °C
Deleted: —
specific region, may be considered.
for off‐board components
8 Freezing of Provide protection at the service AUS 32 freezes at −11,5 °C and has a volume
AUS 32 station in accordance with increase of approximately 7 %.
operational temperature range.
Vehicle parts shall be designed to
cope with freezing and thawing in
accordance with operational
temperature range.
9 Misfilling of fuel Feature required to prevent The geometry of the filler neck specified in
into the AUS 32 dispensing of fuel into the AUS 32 on‐ Figure 1 is significantly smaller than the
on‐board tank board tank. filler nozzles for fuel in service; thus misuse
is precluded.
Deleted: /FDIS
10 Misfilling of AUS Feature required to prevent —
32 into the diesel dispensing of AUS 32 in the fuel on‐
fuel tank board tank.
The design and geometry of the filler
nozzle shall be such that the
insertion of this device in the filler
neck of on‐board fuel tank is not
feasible; thus misuse is precluded.
For canister filling such design and
geometry is recommended.
11 Materials Materials in contact with AUS 32 —
shall be compatible with AUS 32 to
avoid contamination of AUS 32 as
well as corrosion of the devices used.
Suitable materials in accordance with
ISO 22241‐3 shall be selected.
12 Cleanliness A high level of cleanliness of all —
components of the on‐board and
off‐board refilling systems shall be
secured during the manufacturing,
assembly and installation processes
in order to minimize contamination
of AUS 32.
Regarding cleanliness level for the
components of the off‐board refilling
system, see ISO 22241‐3.
Cleanliness level for the components
of the on‐board refilling system shall
be agreed between vehicle and
component manufacturers, in
conformance with state of the art.
13 Reliability The filler neck and the filler cap shall —
be designed and manufactured to be
fully functional for the life of the
vehicle as defined by vehicle
manufacturers.
a
14 Crystallization Protection recommended Contact with air should be minimized.
a
15 Marking Symbol as specified in ISO 2575 or Blue is the recommended colour for filler
equivalent national standard. caps.
a
Recommendations only.
4.2 Filler neck
The dimensional characteristics of the filler neck on the vehicle shall be in accordance with the
specifications of Figure 1. The interface of the filler neck shall be furnished with a buttress thread S
36 × 4 as specified in Figure 1, Figure 2 and Table 2. The front face of the filler neck shall be designed as
sealing surface having a surface finish as specified in Figure 1.
The thread on the filler neck shall withstand a torque of at least 5 Nm.
The filler neck designer should be aware of the potential for insufficient venting with nozzle filling. One
possibility for a design with improved venting capability is a filler neck with ribs as shown in Annex A.
NOTE Buttress thread: a thread with an asymmetrical ridge that has one straight and one angled flank.
Deleted:
Dimensions in millimetres
Key
Deleted: ¶
a
Top surface of filler neck.
b
Nominal dimension for thread details see Figure 2 and Table 2.
c
Thread reference point at Y‐Axis 0,0 mm at Ø29,0 mm for measuring point for start of thread on Z‐Axis.
d
...
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