BS ISO BRITISH STANDARD 18164:2005 Incorporating corrigendum October 2010 Passenger car, truck. bus and motorcycle tyres Methods of measuring rolling resistance ICS 83.160.10 BSi NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTLAW British Standards BS ISO 18164:2005 National foreword This British Standard is the UK implementation of ISO 18164:2005. It supersedes BS AU 50-1.1.3:1993, BS AU 50-1.2.3:1993 and BS AU 50-1.6.7:1998 which are withdrawn. The UK participation in its preparation was entrusted to Technical Committee AUE/4, Tyres and wheels for motor vehicles. 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 confer immunity from legal obligations. This British Standard was Amendments/corrigenda issued since publication published under the authority of the Standards Policy and Strategy Committee Date Comments on3October2005 31 October 2010 Supersession details added to the national foreword C BSI 2010 ISBN 978 0 580 72755 9 ISO INTERNATIONAL STANDARD 18164 First edition 2005-07-01 Passenger car, truck, bus and motorcycle tyres Methods of measuring rolling resistance Pneumatiques pour voitures particulieres, camions, autobus et motocycles - Methodes de mesure de la résistance au roulement Reference number ISO 18164:2005(E) = BS ISO 18164:2005 ISO 18164:2005 (E) Contents Page Foreword 1 Scope. 2 Normative references. 3 Termsanddefinitions 4 Test methods .. 5 Test equipment 5.1 Drum specifications .. 5.2 Test rim.... 5.3 Load, alignment, control and instrumentation accuracies 5.4 Thermal environment.. 6 Test conditions 6.1 General 6.2 Testspeeds. 6.3 Test load 6.4 Test inflation pressure 6.5 Durationandspeed 6.6 Optional conditions. Testprocedure 7.1 General 7.2 Break-in . 7.3 Thermal conditioning .. 7.4 Pressureadjustment. 7.5 Warm-up.... 7.6 Measurement and recording . 7.7 Measurement of parasitic losses. 8 Data interpretation... 8.1 Calculation of parasitic losses.... 8.2 Rolling resistance calculation.. 9 Data analysis. 10 9.1 Rolling resistance coefficient. 10 9.2 Temperature correction. . 10 9.3 Drum diameter correction.... Annex A (informative) Measurement methods of moment of inertia for drum and tyre assembly - Deceleration method ... ..12 Annex B (informative) Optionaltest conditions ... 17 Annex C (normative) Testequipment tolerances . .19 Annex D (normative) Deceleration method based on time-distance measuring ... Bibliography.... ili BS IS0 18164:2005 IS0 18164:2005 (E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (lSOmemberbodies).TheworkofpreparingInternational StandardsisnormallycarriedoutthroughISo technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeen International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/lECDirectives,Part2 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 This first edition represents a compilation of three individual standards (ISO 8767:1992, ISO 9948:1992 and iv BS ISO 18164:2005 ISO 18164:2005 (E) Passenger car, truck, bus and motorcycle tyres Methods of measuring rolling resistance 1 Scope This International Standard specifies methods for measuring rolling resistance, under controlled laboratory motorcycles. The relationship between values obtained and the fuel economy of the vehicle is undetermined and such values are not intended to be used to indicate levels of perform