1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 22241-5:2012Diesel engines NOxreduction agent AUS 32Part 5: Refilling interface for passenger carsBS ISO 22241-5:2012 BRITISH STANDARDNational forewordThis British Standar
2、d is the UK implementation of ISO 22241-5:2012.The UK participation in its preparation was entrusted to TechnicalCommittee MCE/22, Engines for road vehicles.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include a
3、ll the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 69314 4ICS 43.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British St
4、andard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2012.Amendments issued since publicationDate Text affectedBS ISO 22241-5:2012Reference numberISO 22241-5:2012(E)ISO 2012INTERNATIONAL STANDARD ISO22241-5First edition2012-12-01Diesel engines NOx red
5、uction agent AUS 32 Part 5: Refilling interface for passenger cars Moteurs diesel Agent AUS 32 de rduction des NOx Partie 5: Interface de remplissage pour voitures particulires BS ISO 22241-5:2012ISO 22241-5:2012(E) COPYRIGHT PROTECTED DOCUMENT ISO 2012 All rights reserved. Unless otherwise specifie
6、d, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case
7、postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2012 All rights reservedBS ISO 22241-5:2012ISO 22241-5:2012(E) ISO 2012 All rights reserved iiiContents Page Foreword iv Introduction . v 1 Scope 1 2 Norm
8、ative 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
9、.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 Te
10、sting in axial direction 13 Annex A (informative) Filler neck with ribs 15 Bibliography 16 BS ISO 22241-5:2012ISO 22241-5:2012(E) iv ISO 2012 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies
11、). 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 no
12、n-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, Par
13、t 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
14、 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,
15、 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 BS IS
16、O 22241-5:2012ISO 22241-5:2012(E) ISO 2012 All rights reserved vIntroduction The refilling system specified in this part of ISO 22241 has been developed in accordance with passenger vehicle manufacturers specifications. The functional requirements include a filling system that has minimal obtrusive
17、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 cry
18、stal formation. BS ISO 22241-5:2012BS ISO 22241-5:2012INTERNATIONAL STANDARD ISO 22241-5:2012(E) ISO 2012 All rights reserved 1Diesel 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
19、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 specifie
20、s 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
21、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 I
22、SO 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 re
23、ferences, 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 r
24、efilling 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 BS ISO 22241-5:2012ISO 22241-5:2012(E) 2 I
25、SO 2012 All rights reserved3.3 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
26、 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
27、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
28、 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. Detail
29、s not specified are left to the manufacturers choice. BS ISO 22241-5:2012ISO 22241-5:2012(E) ISO 2012 All rights reserved 3Table 1 Basic functional requirements No. Characteristic Requirements Remark 1 Flow rate Not less than 5 Litres per minute Not more than 10 Litres per minute Flow rates do not a
30、pply to canister filling; production line filling. 2 Automatic shut-off of filler nozzle Automatic shut-off feature required. The maximum amount of flow after automatic stop shall be not more than 50 ml. Feature required in compliance with EN 13012 or equivalent standards 3 Maximum filling level in
31、AUS 32 on-board tank The automatic shut-off system of the nozzle shall be used to protect against filling above maximum level. 4 Spillage Less than 0,4 ml per refilling with filler neck angle from the horizontal 30. For test procedure see 5.2 5 Pressure in the filler neck At five seconds after start
32、ing 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 ventilation of the AUS 32 on-board tank. During refilling
33、, not more than 15 ppm ammonia concentration may be measured. For test procedure see 5.3 7 Operational temperature range 30 C to + 80 C 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 suffic
34、ient. 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
35、of fuel into the AUS 32 on-board tank Feature required to prevent dispensing of fuel into the AUS 32 on-board tank. The geometry of the filler neck specified in Figure 1 is significantly smaller than the filler nozzles for fuel in service; thus misuse is precluded. BS ISO 22241-5:2012ISO 22241-5:201
36、2(E) 4 ISO 2012 All rights reservedTable 1 (continued) No. Characteristic Requirements Remark 9 Misfilling of AUS 32 into the diesel fuel tank Feature required to prevent 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
37、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 dev
38、ices used. Suitable materials in accordance with ISO 22241-3 shall be selected. 11 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 contaminati
39、on 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 compliance with state of the art. 12 Reliability The
40、filler neck and the filler cap shall be designed and manufactured to be fully functional for the life of the vehicle as defined by national regulations or vehicle manufacturers. 13 Crystallization RECProtection recommended Contact with air should be minimized. 14 Marking RECSee symbol specified in I
41、SO 2575 and see marking specified in ISO 22241-1. Or use equivalent standards. Blue is the recommended colour for filler caps. NOTE Characteristics marked RECare recommendations only. 4.2 Filler neck The dimensional characteristics of the filler neck on the vehicle shall be in accordance with the sp
42、ecifications of Figure 1. The interface of the filler neck shall be furnished with a buttress thread S 36 x 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 fil
43、ler neck shall withstand a torque of at least 5 Nm. BS ISO 22241-5:2012ISO 22241-5:2012(E) ISO 2012 All rights reserved 5The vehicle manufacturer should be aware of the potential for insufficient venting with nozzle filling. One possibility for a design with improved venting capability is a filler n
44、eck with ribs as shown in Annex A. NOTE Buttress thread: a thread with an asymmetrical ridge that has one straight and one angled flank. Dimensions in millimetres Key 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 0,0mm
45、 at 29,0 mm for measuring point for start of thread on Z-Axis d position of surface thread start surface to adjust at six oclock position e venting of internal vapour through the filler neck f area for venting pipe g horizontal line h minimum straight portion of filler neck Figure 1 Filler neck BS I
46、SO 22241-5:2012ISO 22241-5:2012(E) 6 ISO 2012 All rights reservedKey 1 nut 2 screw Figure 2 Buttress thread 4.3 Filler nozzle If the filler nozzle is of screw-coupling design, the dimensional characteristics shall be as specified in Figure 2 and Table 2. The screw-on filler nozzle shall be furnished
47、 with a gasket. The gasket shall be made of suitable material and the shape of the gasket shall be such that the leakage of ammonia meets 5.2 and 5.3. For screw-coupling designs, the filler nozzle shall be designed to limit the maximum screwing torque to 5 Nm in order to protect the filler neck thre
48、ad. A screw-coupled nozzle shall include internal vapour recovery to avoid pressurizing the tank system during refill. The back pressure in the filler neck generated by the vapour recovery during the refilling shall be lower than +/- 3mbar five seconds after starting the refilling process. There sha
49、ll be ambient pressure in the filler neck at the end of the filling process. BS ISO 22241-5:2012ISO 22241-5:2012(E) ISO 2012 All rights reserved 7Table 2 Buttress thread Dimensions in millimetres Symbol Screw thread S36x4 Nut thread S37,6x4 D, d 36 37,6P 4 d329,058 D130d233 D235,235a 0,2 h33,471 H13,8 R 0,496 w 1,056ac0,472e 0,856 NOTE This table sheet is a calculation and is based on DIN 513 (see Bibliography). Tolerances are recommended to calculate in accordance to the mat
