ISO 19449:2015

Mopeds - Measurement methods for gaseous exhaust emissions during inspection or maintenance

ISO 19449:2015 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.

Mopeds — Méthode de mesure des émissions gazeuses au cours des inspections ou de la maintenance

General Information

• Status: Published
• Publication Date: 08-Dec-2015
• ICS: 13.040.50 - Transport exhaust emissions
• ICS: 43.140 - Motorcycles and mopeds
• Technical Committee: ISO/TC 22/SC 38 - Motorcycles and mopeds
• Drafting Committee: ISO/TC 22/SC 38 - Motorcycles and mopeds
• Current Stage: 9093 - International Standard confirmed
• Start Date: 02-Apr-2021
• Completion Date: 13-Dec-2025

Overview

ISO 19449:2015 - Mopeds: Measurement methods for gaseous exhaust emissions during inspection or maintenance defines standardized, direct measurement procedures for gaseous exhaust concentrations from mopeds (as defined in ISO 3833). The standard applies to spark-ignition mopeds (two-stroke and four-stroke) and specifies test conditions, instrumentation, measurement steps and result presentation for no-load (idling) engine operating condition. Tests are intended for inspections, official roadside checks, maintenance and diagnostics.

Key topics and technical requirements

• Scope & applicability
  • Applies to mopeds with spark ignition engines (two- and four-stroke) during inspection or maintenance.
  • Results represent gaseous emissions at idling (no-load) condition.
• Instrumentation
  • Exhaust analyser compliant with ISO/PAS 3930.
  • Surface temperature meter (±2 K accuracy between 323 K and 373 K).
  • Pulse revolution counter (accuracy ±20 min⁻¹ between 600–2 000 min⁻¹; ±50 min⁻¹ between >2 000–6 000 min⁻¹).
  • Ambient temperature meter (±2 K between 278 K and 313 K).
• Preparation & conditioning
  • Warm-up procedures: four-stroke engines warmed until head/oil drain bolt surface reaches 328–343 K while running 3 000–6 000 min⁻¹; two-stroke engines run at least 15 minutes or 5 km under urban conditions.
  • Choke must be non-operative for testing; ensure exhaust system is leak‑proof.
• Measurement procedure
  • Fit revolution counter and probe (probe insertion ≥ 600 mm into exhaust outlet or use extension).
  • Warm up, set idling speed (adjust to manufacturer’s idling range if possible), select analyser scale.
  • After at least 15 s probe insertion, measure for up to 30 s to obtain minimum and maximum values; report the arithmetic mean of min and max.
• Corrections & reporting
  • Measured values corrected per national requirements; examples and formulas (including corrections for engines with secondary air systems) are given in Annex B.
  • Use the Annex A test report template for consistent presentation of vehicle, analyser, test conditions and results.

Applications and users

ISO 19449:2015 is practical for:

• Vehicle inspection stations and official garages performing periodic moped inspections
• Roadside enforcement and compliance checks
• Maintenance technicians and diagnostic engineers verifying emission control systems
• Accredited test laboratories and regulatory agencies developing inspection protocols
• Moped manufacturers for conformity checks during maintenance procedures

Keywords: ISO 19449:2015, mopeds, gaseous exhaust emissions, measurement methods, idling condition, emission analyser, inspection, maintenance, roadside checks.

Related standards

• ISO 3833 - Vehicle definitions (moped classification)
• ISO/PAS 3930 - Instruments for measuring vehicle exhaust emissions (metrological requirements)
• ISO 3929 - Methods for gaseous exhaust measurement for road vehicles (adaptation referenced in the introduction)

This standard provides clear, repeatable methods to measure and report moped gaseous emissions at idle - useful for enforcement, diagnostics and routine maintenance.

Standards Content (Sample)

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 2015
© 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
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written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
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ii © ISO 2015 – 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 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
Foreword
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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

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.
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.
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
...