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TECHNICAL ISO/DTR
DRAFT
REPORT 11954
ISO/TC 22/SC 37
Fuel cell road vehicles — Performance
Secretariat: DIN
measurement — Vehicles fuelled with
Voting begins on:
2023-09-04 compressed hydrogen
Voting terminates on:
2023-10-30
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/DTR 11954:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023
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ISO/DTR 11954:2023(E)
FINAL
TECHNICAL ISO/DTR
DRAFT
REPORT 11954
ISO/TC 22/SC 37
Fuel cell road vehicles — Performance
Secretariat: DIN
measurement — Vehicles fuelled with
Voting begins on:
compressed hydrogen
Voting terminates on:
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
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THEY ARE AWARE AND TO PROVIDE SUPPOR TING
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DOCUMENTATION.
Phone: +41 22 749 01 11
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [email protected]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
ISO/DTR 11954:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
© ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023
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ISO/DTR 11954:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Parameters, units and accuracy of measurements . 3
5 Test conditions .3
5.1 Vehicle conditions . 3
5.2 Atmospheric conditions. 4
5.2.1 Ambient temperature and atmospheric pressure . 4
5.2.2 Air density . 4
5.2.3 Wind speed . 4
5.2.4 Relative humidity . 4
5.3 Track conditions . 4
5.3.1 General conditions .
...