ISO 17479:2013

INTERNATIONAL ISO
STANDARD 17479
First edition
2013-04-15
Motorcycles — Measurement methods
for gaseous exhaust emissions during
inspection or maintenance
Motocycles — Méthode de mesure des émissions gazeuses au cours
des inspections ou de la maintenance
Reference number
©
ISO 2013
© ISO 2013
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ii © ISO 2013 – All rights reserved

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 motorcycle verification . 2
7 Normal conditioning of motorcycle . 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.8
Bibliography .10
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. www.iso.org/directives
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The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 22, Motorcycles.
iv © ISO 2013 – All rights reserved

Introduction
This International Standard specifies methods for the direct measurement of the concentration
of gaseous exhaust emissions from motorcycles 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 motorcycles.
INTERNATIONAL STANDARD ISO 17479:2013(E)
Motorcycles — 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 motorcycles 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 motorcycles having spark ignition engines
(four-stroke engines or two-stroke engines). This 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 referenced documents are indispensable for the application 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.
1)
ISO/PAS 3930/OIML R99 , Instruments for measuring vehicle exhaust emissions
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
motorcycles with the manual transmission; the parking condition for motorcycles 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:
4.1 Analyser, in accordance with ISO/PAS 3930/OIML R99, suitable for the concentrations of gaseous
exhaust emissions from the motorcycles under test.
1) Joint ISO/OIML (International Organization of Legal Metrology) document.
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 at
−1 −1 −1 −1
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 .
4.4 Ambient temperature meter, with a measurement accuracy of at least ± 2 K between 278
...