ISO 21755-1:2019
(Main)Motorcycles — Measurement method for evaporative emissions — Part 1: SHED test procedure
Motorcycles — Measurement method for evaporative emissions — Part 1: SHED test procedure
This document specifies a basic measurement method by using the SHED (Sealed Housing for Evaporative Determination) test procedure for evaporative emissions from motorcycles. It is applicable to motorcycles equipped with a spark ignition engine (four-stroke engine, two-stroke engine or rotary piston engine).
Motocycles — Méthode de mesure pour les émissions par évaporation — Partie 1: Procédure d'essai SHED
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INTERNATIONAL ISO
STANDARD 21755-1
First edition
2019-07
Motorcycles — Measurement method
for evaporative emissions —
Part 1:
SHED test procedure
Motocycles — Méthode de mesure pour les émissions par
évaporation —
Partie 1: Procédure d'essai SHED
Reference number
©
ISO 2019
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Evaporative emissions, SHED test . 2
4.1 Description of SHED test . 2
4.2 Test motorcycles and test fuel . 3
4.2.1 Test motorcycles . 3
4.2.2 Test fuel . 3
4.3 Test equipment . 3
4.3.1 Chassis dynamometer . 3
4.3.2 Evaporative emission measurement enclosure (SHED) . 4
4.3.3 Analytical systems . 4
4.3.4 Fuel tank heating . 4
4.3.5 Temperature recording . 5
4.3.6 Fans . 5
4.3.7 Gases . 5
4.3.8 Additional equipment . . 6
4.4 Test procedure . 6
4.4.1 Test preparation . 6
4.4.2 Conditioning phase . 6
4.4.3 Test phases . 6
4.5 Calculation of results . 8
5 Calibration of equipment for evaporative emission testing .10
5.1 Calibration frequency and methods .10
5.2 Calibration of the enclosure .10
5.2.1 Initial determination of enclosure internal volume .10
5.2.2 Determination of enclosure background emissions .10
5.2.3 Calibration and hydrocarbon retention test of the enclosure.10
5.2.4 Calculations .11
5.3 Checking of hydrocarbon analyser .11
5.3.1 Detector response optimization .11
5.3.2 Calibration of the hydrocarbon analyser .11
5.3.3 Oxygen interference check and recommended limits .11
5.4 Calibration of the hydrocarbon analyser .12
6 Presentation of results .12
6.1 The evaporative emission .12
6.2 Test report .12
Annex A (informative) Running loss test procedure .13
Annex B (normative) Running-in test procedure for evaporative emission control devices .18
Annex C (normative) Presentation of results for evaporative emissions .20
Bibliography .24
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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 38,
Motorcycles and mopeds.
A list of all parts in the ISO 21755 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
Introduction
Recently, exhaust emissions from tailpipes of motorcycles have been dramatically reduced. Accordingly,
evaporative emissions have begun to attract attention. Therefore, measurement methods for evaporative
emissions are specified as an international standard for multi-application, e.g. certification, research,
developments. This document specifies the basic measurement method by using the SHED (Sealed
Housing for Evaporative Determination) test procedure for evaporative emissions from motorcycles.
INTERNATIONAL STANDARD ISO 21755-1:2019(E)
Motorcycles — Measurement method for evaporative
emissions —
Part 1:
SHED test procedure
1 Scope
This document specifies a basic measurement method by using the SHED (Sealed Housing for
Evaporative Determination) test procedure for evaporative emissions from motorcycles. It is applicable
to motorcycles equipped with a spark ignition engine (four-stroke engine, two-stroke engine or rotary
piston engine).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
ISO 6460-1, Motorcycles — Measurement method for gaseous exhaust emissions and fuel consumption —
Part 1: General test requirements
ISO 6460-2, Motorcycles — Measurement method for gaseous emissions and fuel consumption — Part 2:
Test cycles and specific test conditions
ISO 9277:2010, Determination of the specific surface area of solids by gas adsorption — BET method
ISO 11486, Motorcycles — Methods for setting running resistance on a chassis dynamometer
ISO 7117, Motorcycles — Measurement method for determining maximum speed
ISO 4106, Motorcycles — Engine test code — Net power
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http: //www .electropedia .org/
— ISO Online browsing platform: available at https: //www .iso .org/obp
3.1
evaporative emissions
hydrocarbon vapours lost from the fuel storage and supply system of a motorcycle and not those from
tailpipe emissions
3.2
SHED test
motorcycle test in a constant temperature sealed house for evaporation determination, in which a
special evaporative emission test is conducted
3.3
tank diurnal breathing loss
hydrocarbon emissions caused by temperature changes in the fuel storage
3.4
hot soak loss
hydrocarbon emissions arising from the fuel system of a stationary motorcycle after a period of driving
3.5
non-exposed type fuel tank
fuel tank and fuel delivery system, except the fuel tank cap, which are not directly exposed to radiation
of sunlight
3.6
rated capacity
fuel capacity of the fuel tank as declared by the manufacturer
4 Evaporative emissions, SHED test
4.1 Description of SHED test
The evaporative emission SHED (Sealed Housing for Evaporative Determination) test consists of a
conditioning phase and a test phase (see Figure 1):
a) conditioning phase:
1) test cycle;
2) motorcycle soak;
b) test phase:
1) tank diurnal breathing loss test;
2) test cycle;
3) hot soak loss te
...
INTERNATIONAL ISO
STANDARD 21755-1
First edition
2019-07
Motorcycles — Measurement method
for evaporative emissions —
Part 1:
SHED test procedure
Motocycles — Méthode de mesure pour les émissions par
évaporation —
Partie 1: Procédure d'essai SHED
Reference number
©
ISO 2019
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Evaporative emissions, SHED test . 2
4.1 Description of SHED test . 2
4.2 Test motorcycles and test fuel . 3
4.2.1 Test motorcycles . 3
4.2.2 Test fuel . 3
4.3 Test equipment . 3
4.3.1 Chassis dynamometer . 3
4.3.2 Evaporative emission measurement enclosure (SHED) . 4
4.3.3 Analytical systems . 4
4.3.4 Fuel tank heating . 4
4.3.5 Temperature recording . 5
4.3.6 Fans . 5
4.3.7 Gases . 5
4.3.8 Additional equipment . . 6
4.4 Test procedure . 6
4.4.1 Test preparation . 6
4.4.2 Conditioning phase . 6
4.4.3 Test phases . 6
4.5 Calculation of results . 8
5 Calibration of equipment for evaporative emission testing .10
5.1 Calibration frequency and methods .10
5.2 Calibration of the enclosure .10
5.2.1 Initial determination of enclosure internal volume .10
5.2.2 Determination of enclosure background emissions .10
5.2.3 Calibration and hydrocarbon retention test of the enclosure.10
5.2.4 Calculations .11
5.3 Checking of hydrocarbon analyser .11
5.3.1 Detector response optimization .11
5.3.2 Calibration of the hydrocarbon analyser .11
5.3.3 Oxygen interference check and recommended limits .11
5.4 Calibration of the hydrocarbon analyser .12
6 Presentation of results .12
6.1 The evaporative emission .12
6.2 Test report .12
Annex A (informative) Running loss test procedure .13
Annex B (normative) Running-in test procedure for evaporative emission control devices .18
Annex C (normative) Presentation of results for evaporative emissions .20
Bibliography .24
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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 38,
Motorcycles and mopeds.
A list of all parts in the ISO 21755 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
Introduction
Recently, exhaust emissions from tailpipes of motorcycles have been dramatically reduced. Accordingly,
evaporative emissions have begun to attract attention. Therefore, measurement methods for evaporative
emissions are specified as an international standard for multi-application, e.g. certification, research,
developments. This document specifies the basic measurement method by using the SHED (Sealed
Housing for Evaporative Determination) test procedure for evaporative emissions from motorcycles.
INTERNATIONAL STANDARD ISO 21755-1:2019(E)
Motorcycles — Measurement method for evaporative
emissions —
Part 1:
SHED test procedure
1 Scope
This document specifies a basic measurement method by using the SHED (Sealed Housing for
Evaporative Determination) test procedure for evaporative emissions from motorcycles. It is applicable
to motorcycles equipped with a spark ignition engine (four-stroke engine, two-stroke engine or rotary
piston engine).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
ISO 6460-1, Motorcycles — Measurement method for gaseous exhaust emissions and fuel consumption —
Part 1: General test requirements
ISO 6460-2, Motorcycles — Measurement method for gaseous emissions and fuel consumption — Part 2:
Test cycles and specific test conditions
ISO 9277:2010, Determination of the specific surface area of solids by gas adsorption — BET method
ISO 11486, Motorcycles — Methods for setting running resistance on a chassis dynamometer
ISO 7117, Motorcycles — Measurement method for determining maximum speed
ISO 4106, Motorcycles — Engine test code — Net power
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http: //www .electropedia .org/
— ISO Online browsing platform: available at https: //www .iso .org/obp
3.1
evaporative emissions
hydrocarbon vapours lost from the fuel storage and supply system of a motorcycle and not those from
tailpipe emissions
3.2
SHED test
motorcycle test in a constant temperature sealed house for evaporation determination, in which a
special evaporative emission test is conducted
3.3
tank diurnal breathing loss
hydrocarbon emissions caused by temperature changes in the fuel storage
3.4
hot soak loss
hydrocarbon emissions arising from the fuel system of a stationary motorcycle after a period of driving
3.5
non-exposed type fuel tank
fuel tank and fuel delivery system, except the fuel tank cap, which are not directly exposed to radiation
of sunlight
3.6
rated capacity
fuel capacity of the fuel tank as declared by the manufacturer
4 Evaporative emissions, SHED test
4.1 Description of SHED test
The evaporative emission SHED (Sealed Housing for Evaporative Determination) test consists of a
conditioning phase and a test phase (see Figure 1):
a) conditioning phase:
1) test cycle;
2) motorcycle soak;
b) test phase:
1) tank diurnal breathing loss test;
2) test cycle;
3) hot soak loss te
...
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