ISO 18164:2005/DAmd 1

ISO 18164:2005/DAmd 1

Standards Content (sample)

DRAFT AMENDMENT ISO 18164:2005/DAmd 1
ISO/TC 31 Secretariat: ANSI
Voting begins on: Voting terminates on:
2009-03-27 2009-08-27

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION

Passenger car, truck, bus and motorcycle tyres — Methods of
measuring rolling resistance
AMENDMENT 1

Pneumatiques pour voitures particulières, camions, autobus et motocycles — Méthodes de mesure de la

résistance au roulement
AMENDEMENT 1
ICS 83.160.10

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International Organization for Standardization, 2009
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ISO 18164:2005/DAmd 1
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ii ISO 2009 – All rights reserved
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ISO 18164:2005/DAM 1
Foreword

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rights. ISO shall not be held responsible for identifying any or all such patent rights.

Amendment 1 to ISO 18164:2005 was prepared by Technical Committee ISO/TC 31, Tyres, Rims and Valves,

Subcommittee SC 3, Passenger Car Tyres and Rims.
© ISO 2009 – All rights reserved iii
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DRAFT AMENDMENT ISO 18164:2005/DAM 1
Passenger car, truck, bus and motorcycle tyres — Methods of
measuring rolling resistance
AMENDMENT 1
Page 22
Add the following annex before the Bibliography.
Annex D
(normative)
Deceleration method based on time-distance measuring.
D.1 Purpose

This Annex specifies the method of rolling resistance determination by measuring time-distance relation

during deceleration in chosen speed interval. Rolling resistance as a function of speed including value at 80

(or 60 km/h for the tyres with LI 122 and above and speed symbol J and lower) is the result. Time-distance

measuring for the rolling resistance determination excludes the need to measure either deceleration or speed.

D.2 Limitation

This method is alternative to the deceleration method stated in the body of standard for the several constant

speed value. Unless otherwise noted all other aspects of the standard apply.

Test conditions limitation stated by ISO 28580 are also satisfied by this method.

D.3 Measurement and recording

D.3.1 Choose warm up procedure in accordance with ISO 18164 section 7.4 or ISO 28580 section 7.3

depending from desired task.

D.3.2 When the warm up is finished, accelerate the test tyre to the speed 90 km/h during not more than

8 s and provide freely coasting motion from the initial speed to the speed 70 km/h (figure D.1). Do it for the

loaded test machine with wheel-tyre assembly and then for unloaded test machine with tyre-wheel assembly

removed.
© ISO 2009 – All rights reserved 1
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ISO 18164:2005/DAM 1

NOTE Exclusion: testing speed interval for tyres with LI 122 and above and speed symbol J and lower differs from

stated in D.3.2 and limited from 70 km/h to 50 km/h.

D.3.3 During freely coasting motion according D.3.2 record time-distance relations in discrete form:

t=f(z)
where
t is the time of deceleration from
...