ISO INTERNATIONAL STANDARD 18854 Firstedition 2015-04-15 Small craft Reciprocating internal combustion engines exhaust emission measurement Test- bed measurement of gaseous and particulate exhaust emissions Petits navires - Moteurs alternatifs a combustion interne mesurage des émissions de gaz d'échappement - Mesurage des émissions de gaz et de particules au banc Reference number ISO 18854:2015(E) SO International Organization for Standardization @ IS0 2015 dardization 5956617 vided by IHS under ed without license from IHS IS0 18854:2015(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISOcopyrightoffice Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland Prganizationfor Standardization Not for Resale, 2015/6/29 08:47:05 etworking permitted without license from IHS IS0 18854:2015(E) Contents Page Foreword ..vii Introduction. ..vili 1 Scope. 2 Normative references 3 Terms and definitions 4 Symbols and abbreviations .3 4.1 General symbols. .3 .5 4.2 Symbols for fuel composition. 4.3 Symbols and abbreviations for the chemical components ..5 4.4 Abbreviations.. ..6 5 Test conditions. 5.1 Engine test conditions .7 5.1.1 Test condition parameter .7 5.1.2 Test validity 7 5.2 Engines with charge air cooling .7 5.3 Power .8 5.4 Specific test conditions. .8 5.4.1 Engine air inlet system .8 5.4.2 Engine exhaust system .8 5.4.3 Cooling system. 5.4.4 Lubricating oil. .9 5.4.5 Adjustable carburettors. 5.4.6 Crankcase breather. .9 6 Test fuels .9 7 Application of the engine family concept and choice of parent engine .9 8 Measurement equipment and data to be measured .10 8.1 General. .10 8.2 Dynamometer specification. .10 8.3 Exhaust gas flow 10 8.3.1 General. ..10 8.3.2 Direct measurement method .10 8.3.3 Air and fuel measurement method ..11 8.3.4 Fuel flow and carbon balance method ..11 8.3.5 Tracer measurement method. .11 8.3.6 Air flow and air-to-fuel ratio measurement method .12 8.3.7 Total dilute exhaust gas flow... .13 8.4 Accuracy .13 8.5 Determination of the gaseous components ..14 8.5.1 General analyser specifications. .14 8.5.2 Gas drying. .15 8.5.3 Analysers .15 8.5.4 Sampling for gaseous emissions. ..17 8.6 Particulate determination .18 8.6.1 General .18 8.6.2 Particulate sampling filters .19 8.6.3 Weighing chamber and analytical balance specifications 20 iii see=Zhejiang Institute of Standardization 5956617 ed without license from IHS Not for Resale, 2015/6/29 08:47:05