1、BRITISH STANDARD BS ISO 7634:2007 Road vehicles Compressed air braking systems for towed vehicles including those with electronic braking control functions Test procedures ICS 43.040.40 BS ISO 7634:2007 This British Standard was published under the authority of the Standards Policy and Strategy Comm
2、ittee on 31 July 2007 BSI 2007 ISBN 978 0 580 59129 7 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 7634:2007. It supersedes BS ISO 7634:2003 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee AUE/11, Br
3、aking systems. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot conf
4、er immunity from legal obligations. Amendments issued since publication Amd. No. Date Comments Reference number ISO 7634:2007(E)INTERNATIONAL STANDARD ISO 7634 Third edition 2007-06-01 Road vehicles Compressed air braking systems for towed vehicles including those with electronic braking control fun
5、ctions Test procedures Vhicules routiers Dispositifs de freinage air comprim pour vhicules remorqus, y compris ceux avec fonctions de commande de freinage lectroniques Modes opratoires dessai BS ISO 7634:2007ii iii Contents Page Foreword. v 1 Scope . 1 2 Normative references . 1 3 Terms and definiti
6、ons. 2 4 Symbols . 3 5 Test site conditions 7 5.1 Test site . 7 5.2 Road surface condition 7 5.3 Ambient conditions 8 6 General requirements. 8 7 Recommended sequence of tests. 9 7.1 Preparation and static checks and tests 9 7.2 Basic performance tests unladen 10 7.3 Antilock braking system/electron
7、ically controlled braking system (ABS/EBS) tests unladen 10 7.4 Basic performance tests Laden 10 8 Vehicle preparation. 11 8.1 Documents and basic data 11 8.2 Braking system condition and bedding . 11 8.3 Adjustment of braking equipment 11 8.4 Tyre conditions . 12 8.5 Towing vehicles 12 8.6 Instrume
8、ntation General 12 8.7 Provision for failure simulation. 12 8.8 Loading condition. 13 8.9 Additional vehicle to tow the combination of normal towing vehicle and test trailer . 13 8.10 Additional instrumentation for ABS equipped trailers . 13 8.11 Additional instrumentation for trailer with an electr
9、ic control line . 13 9 Energy storage capacity test. 14 9.1 Test conditions . 14 9.2 Test procedure 14 9.3 Test requirement. 14 9.4 Presentation of results. 14 10 Service braking system Response time measurement 14 10.1 General. 14 10.2 Towing vehicle simulator. 15 10.3 Test conditions . 15 10.4 Tes
10、t procedure 15 10.5 Presentation of results. 16 11 Automatic braking 16 12 Brake defect and failure warning signals. 16 12.1 Antilock braking system warning signal16 12.2 EBS warning signal check . 16 13 Tests on trailers equipped with spring brake actuators. 16 13.1 Initial conditions . 16 13.2 Ene
11、rgy depletion test . 17 BS ISO 7634:2007iv 13.3 Spring brake actuation test 17 13.4 Auxiliary release system check. 17 14 Dynamometer tests (alternative to vehicle tests) 17 14.1 General . 17 14.2 Alternative type I tests (fade test for trailers of categories O 2and O 3 ) 17 14.3 Alternative type II
12、I tests (fade test for category O 4trailers). 19 15 Transfer of results of type I or type III tests to other vehicles . 21 15.1 General . 21 15.2 Presentation of results . 22 16 Control failure of load-sensing device/function Stationary test 23 17 Auxiliary equipment failure 24 18 Basic performance
13、tests Unladen 24 18.1 Type O test (Service braking system cold brake effectiveness) 24 19 Antilock braking system/electronically controlled braking system (ABS/EBS) tests Unladen 26 19.1 Determination of adhesion utilization on high adhesion surface 26 19.2 Determination of the peak coefficient of a
14、dhesion on the high adhesion surface 27 19.3 Wheel behaviour . 30 19.4 Split adhesion tests 30 19.5 Energy consumption of the antilock braking system (on a high adhesion surface). 31 19.6 Antilock braking system failure. 33 19.7 Additional tests on trailers equipped with EBS. 33 20 Basic performance
15、 tests Laden 34 20.1 Parking braking system tests 34 20.2 Type O test (Service braking system cold brake effectiveness) 37 20.3 Control failure of load-sensing device/function Road test 37 20.4 Type I test (fade test for trailers of categories O 2and O 3 ). 37 20.5 Type III test (fade test for vehic
16、les of category O 4 ). 40 Annex A (normative) Description of test vehicle, axle or brake 44 Annex B (normative) Test report. 47 Annex C (informative) Figures. 50 Bibliography . 54 BS ISO 7634:2007v Foreword ISO (the International Organization for Standardization) is a worldwide federation of nationa
17、l 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. Internation
18、al 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
19、 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 le
20、ast 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 7634 was prepared by Technical Committee ISO/TC 22,
21、 Road vehicles, Subcommittee SC 2, Braking systems and equipment. This third edition cancels and replaces the second edition (ISO 7634:2003), which has been technically revised. BS ISO 7634:2007blank1 Road vehicles Compressed air braking systems for towed vehicles including those with electronic bra
22、king control functions Test procedures 1 Scope This International Standard specifies the test procedures for testing the operational performance requirements of towed vehicles of Category O (full trailers, semi-trailers, and centre-axle trailers) as defined in Annex 7 of the UN-ECE Consolidated Reso
23、lution on the Construction of Vehicles (R. E. 3). This includes vehicles fitted with compressed air braking systems (with and without an antilock braking system or an electronically controlled braking system), in accordance with UN-ECE Regulation No. 13, 09 series of amendments, supplements 1 to 6.
24、Test methods covering lock actuators are not included. The values in square brackets and the values in the tables are taken from ECE Regulation No. 13 for information. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated referenc
25、es, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 611, Road vehicles Braking of automotive vehicles and their trailers Vocabulary ISO 1176, Road vehicles Masses Vocabulary and codes ISO 3583, Road vehicle
26、s Pressure test connection for compressed-air pneumatic braking equipment ISO 3833, Road vehicles Types Terms and definitions ISO 7638-1, Road vehicles Connectors for the electrical connection of towing and towed vehicles Part 1: Connectors for braking systems and running gear of vehicles with 24 V
27、nominal supply voltage ISO 7638-2, Road vehicles Connectors for the electrical connection of towing and towed vehicles Part 2: Connectors for braking systems and running gear of vehicles with 12 V nominal supply voltage ISO 11992 (all parts), Road vehicles Interchange of digital information on elect
28、rical connections between towing and towed vehicles ISO/PAS 12158, Road vehicles Braking systems Temperature measuring methods UN-ECE Regulation No. 13, Uniform provisions concerning the approval of vehicles with regard to braking. NOTE Regulation 13 is periodically updated through amendments and su
29、pplements, with this standard having been prepared in accordance with the 09 series of amendments including supplements 1 to 6. When using this standard care should be taken to ensure that changes have not subsequently occurred that effect the test methods or values given. BS ISO 7634:20072 3 Terms
30、and definitions For the purposes of this International Standard, the terms and definitions given in ISO 611, ISO 1176 and ISO 3833 and the following apply. 3.1 pneumatic (full air) braking system braking system in which the control and energy are transmitted from the point of application to the brak
31、es by pneumatic transmission devices NOTE Figures C.1 and C.2 show examples of typical full trailer and semi-trailer air braking systems. 3.2 electronic braking system EBS braking system in which the control is generated and processed as an electrical signal in the control transmission NOTE Electric
32、al output signals control devices which produce actuation forces from stored pneumatic energy. 3.3 categories of ABS 3.3.1 Category A: ABS system which meets all the requirements of UN-ECE Regulation No. 13, Annex 13 3.3.2 Category B: ABS system which meets all the requirements of UN-ECE Regulation
33、No. 13, Annex 13, except paragraph 6.3.2 (no braking rate on split-adhesion surface is prescribed) 3.4 wheel control 3.4.1 directly controlled wheel wheel whose braking force is modulated according to data provided by at least its own sensor 3.4.2 indirectly controlled wheel wheel whose braking forc
34、e is modulated according to data provided by the sensor(s) of other wheel(s) NOTE ABS systems with select-high control are deemed to include both directly and indirectly controlled wheels. In systems with select-low control, all sensed wheels are deemed to be directly controlled wheels. 3.5 ABS full
35、 cycling state of the antilock system in which the brake force is repeatedly modulated to prevent the directly controlled wheels from locking NOTE Brake applications where modulation only occurs during the stop are not considered to meet this definition. 3.6 laden trailer trailer laden so as to reac
36、h its total maximum design mass (ISO 1176 code: ISO-M07) BS ISO 7634:20073 NOTE In the case of semi-trailers and centre-axle trailers being road tested, the loading may be such that the maximum design load per axle (ISO 1176 code: ISO-M11) is reached without loading the fifth wheel for semi-trailers
37、 or the mechanical coupling for centre-axle trailers. However, for the testing of the parking braking system (see 20.1) the loading on the fifth wheel or mechanical coupling in the case of semi-trailer and centre-axle trailers is included. 3.7 unladen trailer trailer at its shipping mass (ISO 1176 c
38、ode: ISO-M05) minus spare wheel(s) and spare wheel carrier(s) and other optional items, plus the mass of the required instrumentation (see 8.6, 8.10 and 8.11) 3.8 electric control line electrical connection between an electronic braking system equipped power-driven vehicle and an electronic braking
39、system equipped trailer which provides the braking control function to the trailer NOTE It comprises the electrical wiring and connector and includes the parts for data communication and the electrical energy supply for the trailer control transmission. 4 Symbols For the purposes of this Internation
40、al Standard, the symbols given in Table 1 apply. Table 1 Symbols Symbols UnitaDescription Symbol used in ECE Reg. No. 13 C Nm Brake camshaft input torque C C Nm Converted camshaft input torque (reference paragraph 15.2.3.4) C oNm Threshold camshaft input torque (i.e. minimum camshaft torque necessar
41、y to produce a measurable braking torque) C oC admNm Technically admissible camshaft input torque at a pressure in the brake actuator lower than the maximum pressure (reference paragraph 15.2.3.3 ) C maxNm Maximum technically admissible camshaft input torque C maxE m Wheelbase E E Rm Distance betwee
42、n kingpin and centre of axle or axles of semi-trailer (or distance between drawbar coupling and centre of axle or axles of centre-axle trailer) E Re Index to indicate the reference axle e Adhesion utilization of the trailer H value on the high adhesion surface H L value on the low adhesion surface L
43、F AN Average output thrust of one brake actuator at a pressure p Acorresponding to p m= 0,65 MPa (= 6,5 bar) F AN Converted brake actuator output thrust (to allow for difference between p Aeand p A ) (reference paragraph 15.2.3.4) F AON Threshold brake actuator output thrust (i.e. minimum output thr
44、ust necessary to produce a measurable braking torque) BS ISO 7634:20074 Table 1 (continued) Symbols UnitaDescription Symbol used in ECE Reg. No. 13 F AadmN Maximum technically admissible brake actuator output thrust at a pressure in the brake actuator lower than the maximum pressure (reference parag
45、raph 15.2.3.3) F AmaxN Maximum technically admissible brake actuator output thrust F BN Braking force at the periphery of the wheel(s) (if no other indication is given) T F BaN Braking force resulting at the periphery of the wheel(s) for hot braking T F BaRN Sum of braking forces resulting at the pe
46、riphery of all wheels of the trailer for hot braking T RF BhN Braking force at the periphery of the wheel(s) for heating the brake(s) F BRN Sum of braking forces at the periphery of all wheels of the trailer T RF bRN Braking force of the trailer with the antilock system inoperative F bRF bRALN Braki
47、ng force of the trailer with the antilock system operative F bRALF bRALSN F bRALon split adhesion surface F bRmaxN Maximum value of F bRF bRmaxF CdN Total normal reaction of road surface on those axles of the motor vehicle and trailer combination which are both unbraked and driven F CdF CndN Total n
48、ormal static reaction of road surface on those axles of the motor vehicle and trailer combination which are unbraked yet non- driven F CndF dynN Normal dynamic reaction of road surface on the trailer axles, with the antilock system operative F dynF fdynN F dynon front axle of a full trailer F fdynF
49、iN Normal static reaction of road surface on axle i P i,F iF idynN F dynon axle i of a full trailer F idynF KN Normal static reaction at a tractor fifth wheel on semi-trailer kingpin, or at mechanical coupling of a towing vehicle on the drawbar of a centre- axle trailer F LN Longitudinal force on a mechanical coupling D F MN Total normal reaction of road surface on all wheels of the motor (towing) vehicle P
