ISO 7141:2022

INTERNATIONAL ISO
STANDARD 7141
Fourth edition
2022-04
Road vehicles — Light alloy wheels —
Lateral impact test
Reference number
© ISO 2022
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test equipment .1
5 Calibration .1
6 Test procedure .2
7 Failure criteria .2
Annex A (informative) Velocity sensor set-up and measuring procedure . 8
iii
Foreword
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This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 33,
Vehicle dynamics and chassis components.
This fourth edition cancels and replaces the third edition (ISO 7141:2005), which has been technically
revised.
The main changes are as follows:
— editorial modifications;
— addition of subclause 5.1 and corresponding Annex A;
— Clause 7 failure criteria, clarification and insertion of examples in Figure 3.
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
Introduction
The purpose of this document is to improve the repetitious accuracy and the application for increasing
wheel diameters and static wheel loads.
Therefore, it is necessary to describe the test rig in more details and include additional descriptions for
failure criteria.
v
INTERNATIONAL STANDARD ISO 7141:2022(E)
Road vehicles — Light alloy wheels — Lateral impact test
1 Scope
This document specifies a laboratory test procedure to evaluate the axial (lateral) kerb impact collision
properties of a wheel manufactured either wholly or partly of light alloys. It is intended for passenger
car applications, and special vehicle applications where there is a possibility of the wheel impacting the
kerb, with the purpose of screening and/or quality control of the wheel.
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 3911, Wheels and rims for pneumatic tyres — Vocabulary, designation and marking
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 3911 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Test equipment
4.1 New wheels, fully processed, representative of wheels intended for vehicle application, fitted
with a tyre. Tyres and wheels used in the tests should not be used subsequently on a vehicle.
4.2 Impact loading test machine with a vertically acting steel striker having an impacting face, in
accordance with Figure 1. The striker mass, m, within a tolerance of ±2 %, expressed in kilograms, shall
be as follows:
mW=+06, 180
where W is the maximum vertical static load which is specified by the wheel or the vehicle manufacturer,
expressed in kilograms. In the absence of such specification, the largest value of the load rating of the
tyre which can be applied to the wheel for the application.
4.3 Mass of 1 000 kg.
5 Calibration
Ensure, by means of a test calibration adapter, that the 1 000 kg mass (4.3) applied vertically to the
centre of the wheel fixing as shown in Figure 2 causes a deflection of (7,5 ± 0,75) mm when measured at
the centre of the beam.
...