ISO 28981-2009 Mopeds - Methods for setting the running resistance on a chassis dynamometer《轻便摩托车 底盘测功机上设置运行阻力的方法》.pdf
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1、 Reference number ISO 28981:2009(E) ISO 2009INTERNATIONAL STANDARD ISO 28981 First edition 2009-11-01 Mopeds Methods for setting the running resistance on a chassis dynamometer Cyclomoteurs Mthodes pour fixer la rsistance lavancement sur un banc dynamomtrique ISO 28981:2009(E) PDF disclaimer This PD
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5、 ISO 2009 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 or ISOs member body in
6、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 2009 All rights reservedISO 28981:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword i
7、v Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Symbols2 5 Test moped, chassis dynamometer and instruments .3 6 Required accuracy of measurements .4 7 Road test 4 7.1 Requirement for road 4 7.2 Ambient conditions for the road test 4 7.3 Reference speed5 7.4 Specified s
8、peed .5 7.5 Coastdown starting speed5 7.6 Coastdown time measurement beginning speed and ending speed.5 7.7 Preparation of test moped5 7.8 Rider and riding position6 7.9 Measurement of coastdown time.6 8 Data processing.8 8.1 Calculation of running resistance force8 8.2 Running resistance curve fitt
9、ing .8 8.3 Target running resistance force for chassis dynamometer setting.8 9 Chassis dynamometer setting derived from on-road coastdown measurements .8 9.1 Requirements for the equipment .8 9.2 Inertia mass setting.9 9.3 Warming up of chassis dynamometer 9 9.4 Adjustment of tyre pressures 9 9.5 Mo
10、ped warming up9 9.6 Procedures for setting chassis dynamometer .9 9.7 Verification of chassis dynamometer12 10 Chassis dynamometer setting using the running resistance table .12 10.1 Applicability .12 10.2 Requirements for the equipment .12 10.3 Setting the running resistance force on the chassis dy
11、namometer14 10.4 The specified speed for the chassis dynamometer.14 10.5 Verification of chassis dynamometer14 Annex A (normative) Moped description16 Annex B (normative) Chassis dynamometer and instruments description .18 Annex C (informative) Record of coastdown time and chassis dynamometer settin
12、g .20 Bibliography23 ISO 28981:2009(E) iv ISO 2009 All rights reservedForeword 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 techni
13、cal 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 w
14、ith 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 Int
15、ernational 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 m
16、ay be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 28981 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 23, Mopeds. ISO 28981:2009(E) ISO 2009 All rights reserved vIntroduction This International Sta
17、ndard is based on ISO 11486:2006 6 , which specifies the measurement method(s) for determining motorcycle running resistance on the road, but adapted to the different vehicle category of mopeds. The most significant difference between this International Standard and ISO 11486:2006 6is that use of ch
18、assis dynamometers with a fixed load curve is permitted and a specific verification method is specified. INTERNATIONAL STANDARD ISO 28981:2009(E) ISO 2009 All rights reserved 1Mopeds Methods for setting the running resistance on a chassis dynamometer 1 Scope This International Standard specifies the
19、 measurement method for determining the moped running resistance on the road, and two methods of setting the chassis dynamometer with the moped running resistance. It is applicable to mopeds as defined in ISO 3833. 2 Normative references The following referenced documents are indispensable for the a
20、pplication 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 3833, Road vehicles Types Terms and definitions ISO 7116, Mopeds Measurement method for maximum speed 3 Ter
21、ms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 running resistance F total force resistant to a running moped which, when measured by the coastdown method, includes the friction forces in the drive-train 3.2 reference speed v 0moped speed at which
22、 the running resistance of the moped is calculated and then used for setting the chassis dynamometer 3.3 specified speed v moped speed at which the running resistance on the road is measured to determine the running resistance curve 3.4 moped kerb mass m kmoped dry mass to which is added the mass of
23、 the following: fuel: tank filled at least to 90 % of the capacity specified by the manufacturer; ISO 28981:2009(E) 2 ISO 2009 All rights reserved oils and coolant: filled as specified by the manufacturer; auxiliary equipment usually supplied by the manufacturer in addition to that necessary for nor
24、mal operation tool-kit, carrier(s), windscreen(s), protective equipment, etc. 3.5 moped reference mass m refkerb mass of the moped increased by a uniform figure of 75 kg which represents the mass of a rider 4 Symbols For the purposes of this document, the symbols in Table 1 apply. Table 1 Symbols Sy
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- ISO289812009MOPEDSMETHODSFORSETTINGTHERUNNINGRESISTANCEONACHASSISDYNAMOMETER 轻便 摩托车 底盘 测功机 设置 运行 阻力 方法
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