ISO 19449:2015

INTERNATIONAL ISO
STANDARD 19449
First edition
2015-12-01
Mopeds — Measurement methods for
gaseous exhaust emissions during
inspection or maintenance
Mopeds — Méthode de mesure des émissions gazeuses au cours des
inspections ou de la maintenance
Reference number
ISO 19449:2015(E)
©
ISO 2015

---------------------- Page: 1 ----------------------
ISO 19449:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland
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.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 19449:2015(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Instrumentation . 1
5 Check, maintenance periodicity and precautions for use of instruments .2
5.1 Check before use . 2
5.2 Maintenance periodicity . 2
5.3 Precautions for use . 2
6 General moped verification . 2
7 Normal conditioning of moped . 3
7.1 Warming up . 3
7.2 Test conditions . 3
8 Gaseous exhaust emissions and corrections . 3
9 Measurement methods for gaseous exhaust emissions . 3
Annex A (normative) Presentation of results. 5
Annex B (informative) Examples of gaseous exhaust emissions correction method.7
Bibliography . 9
© ISO 2015 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 19449:2015(E)

Foreword
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 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
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 38,
Motorcycles and mopeds.
iv © ISO 2015 – All rights reserved

---------------------- Page: 4 ----------------------
ISO 19449:2015(E)

Introduction
This International Standard specifies methods for the direct measurement of the concentration of
gaseous exhaust emissions from mopeds during inspections, official roadside checks or maintenance.
Although ISO 3929 specifies methods for the direct measurement of the concentration of gaseous
exhaust emissions from road vehicles, this International Standard is the adaptation of ISO 3929 to
comply with needs specific to mopeds.
© ISO 2015 – All rights reserved v

---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 19449:2015(E)
Mopeds — Measurement methods for gaseous exhaust
emissions during inspection or maintenance
1 Scope
This International Standard specifies methods for the direct measurement of the concentration of
gaseous exhaust emissions from mopeds as defined in ISO 3833 during inspection or maintenance. The
results measured by this International Standard show the concentration of gaseous exhaust emissions
in the no-load engine operating condition. It is applicable to mopeds having spark ignition engines
(four-stroke engines or two-stroke engines). These methods can be used, either totally or partially, for
— periodic inspections in official garages,
— official roadside checks, and
— maintenance and diagnostic operations.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
1)
ISO/PAS 3930 , Instruments for measuring vehicle exhaust emissions — Metrological and technical
requirements; Metrological control and performance tests
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
idling condition
no-load operating condition of engine warmed up in accordance with 7.1 with
— no manual operation with fuel system controls (throttle, choke, etc.),
— the gear in neutral, and the manual clutch engaged for mopeds with the manual transmission,
— the parking condition for mopeds with the automatic transmission, and
— standard production equipment, accessories and optional equipment that modify the engine speed
used in accordance with the manufacturer’s recommendations or regulatory requirements
Note 1 to entry: Automatically operated headlamps are standard production equipment. There is a possibility
that headlamp operation influences the test results of gaseous exhaust emissions.
3.2
idling speed
engine speed (range) specified by the manufacturer under the idling condition.
4 Instrumentation
The instruments listed below shall be prepared:
1) Joint ISO/OIML (International Organization of Legal Metrology) document.
© ISO 2015 – All rights reserved 1

---------------------- Page: 6 ----------------------
ISO 19449:2015(E)

4.1 Analyser, in accordance with ISO/PAS 3930, suitable for the concentrations of gaseous exhaust
emissions from the mopeds under test,
4.2 Surface temperature meter, with a measurement accuracy of at least ±2 K between 323 K and
373 K,
4.3 Pulse revolution counter, for measuring engine speed. The measurement accuracy shall be
-1 -1 -1 -1
at least ±20 min between 600 min and 2 000 min , and shall be at least ±50 min between over
-1 -1
2 000 min and 6 000 min , and
4.4 Ambient temperature meter, with a measurement accuracy of at least ±2 K between 278 K and
313 K.
5 Check, maintenance periodicity and precautions for use of instruments
5.1 Check before use
The power supply to the instruments shall be in accordance with the manufacturer’s specifications.
Check that the instruments are ready for testing in accordance with the manufacturer’s operating
instruc
...