ISO 22241-5:2012

Diesel engines — NOx reduction agent AUS 32 — Part 5: Refilling interface for passenger cars

ISO 22241-5:2012 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 may also be used by vehicles with a gross vehicle mass of over 3,5 t. ISO 22241-5:2012 specifies the refilling interface for the NOX reduction agent AUS 32 in compliance with ISO 22241-1, which is needed to operate converters with the selective catalytic reduction (SCR) exhaust treatment system. It 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.

Moteurs diesel — Agent AUS 32 de réduction des NOx — Partie 5: Interface de remplissage pour voitures particulières

General Information

• Status: Withdrawn
• Publication Date: 26-Nov-2012
• Withdrawal Date: 26-Nov-2012
• ICS: 43.060.40 - Fuel systems
• Technical Committee: ISO/TC 22/SC 34 - Propulsion, powertrain and powertrain fluids
• Drafting Committee: ISO/TC 22/SC 34/WG 14 - NOx reduction additive
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 05-Jul-2019

Relations

• Revised: ISO 22241-5:2019 - Diesel engines — NOx reduction agent AUS 32 — Part 5: Refilling interface for passenger cars
• Effective Date: 28-Nov-2015

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 22241-5
First edition
2012-12-01

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 22241-5:2012(E)
©
ISO 2012

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ISO 22241-5:2012(E)

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©  ISO 2012
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ii © ISO 2012 – All rights reserved

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ISO 22241-5:2012(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" . 8
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

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ISO 22241-5:2012(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 2.
The main task of technical committees is to prepare International Standards. 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 document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 22241-5 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 5, Engine
tests.
ISO 22241 consists of the following parts, under the general title Diesel engines — NOx reduction agent
AUS 32:
 Part 1: Quality requirements
 Part 2: Test methods
 Part 3: Handling, transportation and storing
 Part 4: Refilling interface
 Part 5: Refilling interface for passenger cars
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ISO 22241-5:2012(E)
Introduction
The refilling system specified in this part of ISO 22241 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.
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INTERNATIONAL STANDARD ISO 22241-5:2012(E)

Diesel engines — NOx reduction agent AUS 32 —
Part 5:
Refilling interface for passenger cars
1 Scope
This part of ISO 22241 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 may also be used by vehicles with a gross vehicle
mass of over 3,5 t.
This part of ISO 22241 specifies the refilling interface for the NOx reduction agent AUS 32 in compliance with
ISO 22241-1, which is needed to operate converters with selective catalytic reduction (SCR) exhaust
treatment system. This part of ISO 22241 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 part of ISO 22241, the term “NOx reduction agent AUS 32” is abbreviated to “AUS 32”.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies .
ISO 22241-3, Diesel engines — NOx reduction agent AUS 32 — Part 3: Handling, transportation and storing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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
container of size 1 to 10 litres capacity, with spout used to refill the vehicle on-board tank
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ISO 22241-5:2012(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 which is 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
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;
 mismatching prevention.
The detailed requirements specified in Table 1 apply.
Details not specified are left to the manufacturer's choice.
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ISO 22241-5:2012(E)
Table 1 — Basic functional requirements
No. Characteristic Requirements Remark
1 Flow rate Not less than 5 Litres per minute Flow rates do not apply to
Not more than 10 Litres per minute  — canister filling;
  — production line filling.
2 Automatic shut-off of filler Automatic shut-off feature required. Feature required in compliance with
nozzle The maximum amount of flow after EN 13012 or equivalent standards
automatic stop shall be not more than
50 ml.
3 Maximum filling level in The automatic shut-off system of the
AUS 32 on-board tank nozzle shall be used to protect against
filling above maximum level.
4 Spillage Less than 0,4 ml per refilling with filler For test procedure see 5.2
neck angle from the horizontal ≥ 30°.
5 Pressure in the filler neck At five seconds after starting the
refilling process, the pressure in the
filler neck shall be not more than +/-
3 mbar. At the end of refilling
process, there shall be ambient
pressure in the filler neck.
6 Ventilation during refilling The filler neck shall be used for For test procedure see 5.3
ventilation of the AUS 32 on-board
tank.
During refilling, not more than 15 ppm
ammonia concentration may be
measured.
7 Operational temperature
– 30 °C to + 80 °C
range
for components installed on the
vehicle
– 20 °C to + 40 °C
for components at the service station
For specific regions, the temperature
range specified may not be sufficient.
In such a case, a wider temperature
range, representative of that specific
region, shall be considered.
For specific regions, the temperature
range specified may be excessive. In
such a case, a narrower temperature
range, representative of that specific
region, may be considered.
8 Misfilling of fuel into the Feature required to prevent The geometry of the filler neck specified
AUS 32 on-board tank dispensing of fuel into the AUS 32 on- in Figure 1 is significantly smaller than
board tank. the filler nozzles for fuel in service; thus
misuse is precluded.

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ISO 22241-5:2012(E)
Table 1 (continued)
No. Characteristic Requirements Remark
9 Misfilling of AUS 32 into the Feature required to prevent
diesel fuel tank dispensing of AUS 32 in the fuel on-
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.
10 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
...