1、BS ISO 8709:2010 ICS 43.140 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Mopeds Brakes and brake systems Tests and measurement methodsThis British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2010. BSI
2、2010 ISBN 978 0 580 59333 8 Amendments/corrigenda issued since publication Date Comments BS ISO 8709:2010 National foreword This British Standard is the UK implementation of ISO 8709:2010. The UK participation in its preparation was entrusted to Technical Committee AUE/14, Motor cycles and mopeds. A
3、 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 confer immunity from
4、 legal obligations.BS ISO 8709:2010Reference number ISO 8709:2010(E) ISO 2010INTERNATIONAL STANDARD ISO 8709 Second edition 2010-04-15 Mopeds Brakes and brake systems Tests and measurement methods Cyclomoteurs Freins et systmes de freinage Mthodes dessai et de mesure BS ISO 8709:2010 ISO 8709:2010(E
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8、RIGHT PROTECTED DOCUMENT ISO 2010 All rights reserved. Unless otherwise specified, 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
9、 or ISOs member body in the country of the requester. ISO copyright office Case 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 2010 All rights reservedBS ISO 8709:2010 ISO 8709:2010(E) ISO 2010 All rig
10、hts reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Terms and definitions .1 3.1 Vehicle categories .2 3.2 Brake system and components .2 3.3 Types of brake systems2 3.4 Moped loading .3 3.5 Test parameters.3 4 Test site conditions.4 4.1 Test surface .4 4.2 Wind speed 4 4.3
11、Ambient temperature 5 4.4 Test lane for dynamic tests 5 5 Moped preparation 5 5.1 Tyres .5 5.2 Engine idle speed 5 5.3 Mass distribution.5 5.4 Instrumentation .5 5.5 Burnishing7 6 Test requirements .7 6.1 Brakes.7 6.2 Brake temperature measurement 8 6.3 Application of control forces8 6.4 Test sequen
12、ce8 6.5 Rider8 6.6 Automatic transmission9 6.7 Moped position and wheel lock .9 6.8 Test speed tolerance.9 6.9 Measurement of dynamic performance 9 6.10 Test report10 7 Test procedures.10 7.1 Dry stop test (single brake control actuated).10 7.2 Wet brake test 11 7.3 Parking brake system test13 7.4 P
13、ower-assisted brake system failure test.14 Annex A (normative) Specimen format for test result sheet16 Bibliography21 BS ISO 8709:2010 ISO 8709:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bod
14、ies (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 organization
15、s, 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 I
16、SO/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
17、 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 8709 was prepared by Technical Committee ISO/TC 22, Road vehicles,
18、 Subcommittee SC 23, Mopeds. This second edition cancels and replaces the first edition (ISO 8709:1995), which has been technically revised. It also incorporates the Technical Corrigendum ISO 8709:1995/Cor.1:1998. BS ISO 8709:2010 INTERNATIONAL STANDARD ISO 8709:2010(E) ISO 2010 All rights reserved
19、1Mopeds Brakes and brake systems Tests and measurement methods 1 Scope This International Standard specifies tests and measurement methods for service brake systems and, where applicable, associated parking brake systems of two-wheeled mopeds (3-1) and three-wheeled mopeds (3-2) which are intended f
20、or use on public roads, in order to establish uniform worldwide test procedures for braking systems. This International Standard does not cover mopeds which: have a maximum speed of less than 25 km/h; are equipped for disabled riders. This International Standard sets out the following types of tests
21、: dynamic tests: dry stop test (single brake control actuated); wet brake test; parking brake system test; power-assisted brake system failure test. NOTE The test methods (application, condition of the moped, test procedure and parameters, measurement of performances) for all the tests defined in th
22、is International Standard are equivalent to the corresponding test methods prescribed by UNECE Global Technical Regulation No. 3. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. Fo
23、r undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3779, Road vehicles Vehicle identification number (VIN) Content and structure ISO 7116, Mopeds Measurement method for determining maximum speed 3 Terms and definitions For the purposes of this
24、 document, the following terms and definitions apply. BS ISO 8709:2010 ISO 8709:2010(E) 2 ISO 2010 All rights reserved3.1 Vehicle categories NOTE Vehicle categories as defined in this clause correspond to those given in UNECE Special Resolution No. 1. 3.1.1 category 3 vehicle power driven vehicle wi
25、th 2 or 3 wheels designed and constructed for the carriage of persons, of goods, or of persons and goods 3.1.1.1 category 3-1 vehicle two-wheeled moped two-wheeled vehicle with an engine cylinder capacity not exceeding 50 cm 3in the case of a thermic engine and a maximum design speed not exceeding 5
26、0 km/h, whatever the means of propulsion 3.1.1.2 category 3-2 vehicle three-wheeled moped three-wheeled vehicle of any wheel arrangement with an engine cylinder capacity not exceeding 50 cm 3in the case of a thermic engine and a maximum design speed not exceeding 50 km/h, whatever the means of propu
27、lsion 3.2 Brake system and components 3.2.1 brake system combination of parts (other than the engine), consisting of the control, the transmission(s) and the brake(s), the function of which is progressively to reduce the speed of a moving moped, bring it to a halt and keep it stationary if it is alr
28、eady halted 3.2.2 control part actuated directly by the rider to supply to the transmission or control the energy required for braking the moped 3.2.3 transmission combination of components which provide the functional link between the control and the brake 3.2.4 brake parts of the brake system in w
29、hich the forces opposing the movement of the moped are developed 3.3 Types of brake systems 3.3.1 service brake system brake system which is used for slowing the moped when in motion 3.3.1.1 single brake system service brake system which acts on only one axle 3.3.1.2 combined brake system CBS two-wh
30、eeled mopeds service brake system whereby at least two brakes on different wheels are actuated by the operation of a single control BS ISO 8709:2010 ISO 8709:2010(E) ISO 2010 All rights reserved 33.3.1.3 combined brake system CBS three-wheeled mopeds service brake system whereby the brakes on all th
31、e wheels are actuated by the operation of a single control 3.3.1.4 secondary brake system second service brake system on a vehicle equipped with a combined brake system 3.3.2 power-assisted brake system brake system in which the energy necessary to produce the braking force is supplied by the physic
32、al effort of the rider assisted by one or more energy supplying devices EXAMPLE Vacuum assisted (with vacuum booster). 3.4 Moped loading NOTE Vehicle masses as defined in this clause correspond to those given in UNECE Special Resolution No. 1. 3.4.1 laden moped moped laden so as to reach its gross v
33、ehicle mass 3.4.2 lightly loaded moped moped in the condition of mass in running order to which 15 kg are added, in order to account for the test equipment as described in 5.4 3.4.3 gross vehicle mass maximum mass of the fully laden solo vehicle, based on its construction and design performances, as
34、 declared by the manufacturer 3.4.4 mass in running order sum of unladen vehicle mass and 75 kg, in order to account for the drivers mass 3.4.5 unladen vehicle mass mass of the vehicle with bodywork and all factory fitted equipment, electrical and auxiliary equipment for normal operation of vehicle,
35、 including liquids (fuel tank filled to at least 90 % of the rated capacity and the other liquid containing systems to 100 % of the capacity specified by the manufacturer), tools, fire extinguisher, standard spare parts, chocks and spare wheel, if fitted 3.5 Test parameters 3.5.1 test speed V moped
36、speed measured at the moment the rider begins to actuate the brake control(s) NOTE For tests where simultaneous actuation of two controls is specified, the moped speed is taken from the moment the first control is actuated. BS ISO 8709:2010 ISO 8709:2010(E) 4 ISO 2010 All rights reserved3.5.2 mean f
37、ully developed deceleration MFDD d maverage deceleration calculated from the moment the moped reaches 80 % of the test speed until the moment the moped reaches 10 % of the test speed 3.5.3 stopping distance S distance travelled by the moped, measured from the moment the rider begins to actuate the b
38、raking system control until the moment the moped comes to a stop NOTE For tests where simultaneous actuation of two controls is specified, the distance travelled is taken from the moment the first control is actuated. 3.6 baseline test stop or series of stops carried out in order to confirm the perf
39、ormance of the brake prior to subjecting it to a further test, such as the heating procedure or wet brake stop 3.7 engine disconnected condition when the engine is no longer connected to the driving wheel(s) 3.8 initial brake temperature temperature of the hottest brake before any brake application
40、3.9 maximum speed V maxspeed which the moped can attain when tested in accordance with ISO 7116 3.10 peak braking coefficient PBC measure of tyre to road surface friction based on the maximum deceleration of a rolling tyre 3.11 wheel lock condition that occurs when there is a slip ratio of 1,00 4 Te
41、st site conditions 4.1 Test surface The test surface for dynamic tests shall be clean, dry and substantially level (i.e. it shall not have a gradient in excess of 1 %). The surface shall afford good adhesion, i.e. it shall have a nominal peak braking coefficient (PBC) of 0,9, unless otherwise specif
42、ied. The parking brake system test is conducted on a specified gradient. The specified test slope shall have a clean and dry surface that does not deform under the weight of the moped. 4.2 Wind speed The average wind speed shall not exceed 5 m/s. BS ISO 8709:2010 ISO 8709:2010(E) ISO 2010 All rights
43、 reserved 54.3 Ambient temperature The ambient temperature shall be between 4 C and 45 C. 4.4 Test lane for dynamic tests The test area immediately after the point at which the test is to commence shall be marked with a lane of sufficient length for the moped to be brought to a stop. In the case of
44、two-wheeled mopeds (3-1), this lane shall be 2,5 m wide. In the case of three-wheeled mopeds (3-2), this lane shall have a width of 2,5 m plus the moped width. 5 Moped preparation 5.1 Tyres The tyres shall be inflated to the moped manufacturers recommended pressure levels as appropriate to the vehic
45、le loading condition for the test. 5.2 Engine idle speed The engine idle speed shall be set to the moped manufacturers specification. 5.3 Mass distribution The mass distribution on the axles for laden moped tests shall be in accordance with the moped manufacturers specifications and shall be noted i
46、n the test report. 5.4 Instrumentation The moped shall be prepared for the tests specified in Table 1 by the provision, the calibration, or the provision and calibration of existing instruments, as required. Optional instruments may be added to provide data, but care shall be taken to ensure that no
47、 equipment significantly affects the brake system performance or the dynamic characteristics of the moped. Table 1 Test sequence and related instrumentation Parameter (to measure/calculate) Test Obligatory Optional Example of instrument Speed Calibrated speedometer, photoelectronic measuring systems
48、 Brake temperature Rubbing thermocouple, embedded thermocouple Moped mass Load cells, weighbridge 0. Burnishing procedure aDeceleration Motometer, third wheel, recording deceleration meter BS ISO 8709:2010 ISO 8709:2010(E) 6 ISO 2010 All rights reservedTable 1 (continued) Parameter (to measure/calcu
49、late) Test Obligatory Optional Example of instrument Speed Calibrated speedometer, photoelectronic measuring systems Brake temperature Rubbing thermocouple, embedded thermocouple Control force Force meter Stopping distance or MFDD (see 6.9.2) Chalk-pellet gun, third wheel, ink jet marker Motometer, third wheel, recording deceleration meter Moped mass Load cells, weighbridge Force in transmission Hydraulic pressure transducer, cable tension transducer 1. Dry stop test (single brake control actuat
