ISO 16750-3:2023

Road vehicles — Environmental conditions and testing for electrical and electronic equipment — Part 3: Mechanical loads

This document applies to electric and electronic systems and components for vehicles including electric propulsion systems and components with maximum working voltages according to voltage class B. It describes the potential environmental stresses and specifies tests and requirements recommended for the specific mounting location on/in the vehicle. This document describes mechanical loads. This document is not intended to apply to environmental requirements or testing for systems and components of motorcycles and mopeds. Systems and their components released for production, or systems and their components already under development prior to the publication date of this document, can be exempted from fulfilling the changes in this edition compared to the previous one.

Véhicules routiers — Spécifications d'environnement et essais de l'équipement électrique et électronique — Partie 3: Contraintes mécaniques

General Information

• Status: Published
• Publication Date: 25-Jul-2023
• ICS: 43.040.10 - Electrical and electronic equipment
• Technical Committee: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
• Drafting Committee: ISO/TC 22/SC 32/WG 2 - Environmental conditions
• Current Stage: 9092 - International Standard to be revised
• Due Date: 21-Mar-2025
• Completion Date: 21-Mar-2025

Relations

• Consolidated By: ISO 20122:2024 - Vegetable oils — Determination of mineral oil saturated hydrocarbons (MOSH) and mineral oil aromatic hydrocarbons (MOAH) with online-coupled high performance liquid chromatography-gas chromatography-flame ionization detection (HPLC-GC-FID) analysis — Method for low limit of quantification
• Effective Date: 25-Feb-2023
• Revises: ISO 16750-3:2012 - Road vehicles — Environmental conditions and testing for electrical and electronic equipment — Part 3: Mechanical loads
• Effective Date: 23-Apr-2020

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 16750-3
Fourth edition
2023-07
Road vehicles — Environmental
conditions and testing for electrical
and electronic equipment —
Part 3:
Mechanical loads
Véhicules routiers — Spécifications d'environnement et essais de
l'équipement électrique et électronique —
Partie 3: Contraintes mécaniques
Reference number
© ISO 2023
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
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or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: [phone]
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Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Tests and requirements .2
4.1 Vibration . 2
4.1.1 Testing conditions during the vibration test . 2
4.1.2 Test Ia - Passenger car, combustion engine, small and lightweight DUT . 9
4.1.3 Test II — Passenger car, gearbox attached to a combustion engine, small
and lightweight DUT . 11
4.1.4 Test VI — Commercial vehicle, combustion engine and gearbox, small and
lightweight DUT .13
4.1.5 Test XIII — Passenger car, hybrid-electric powertrain, combustion engine
and gearbox, large and heavy DUT. 17
4.1.6 Test XV — Passenger car, driving electric motor . 20
4.1.7 Test XVII — Commercial vehicle, driving electric motor .23
4.1.8 Test IV — Passenger car, sprung masses (vehicle body), small and
lightweight DUT . 24
4.1.9 Test VII — Commercial vehicle, sprung mass (vehicle body), small and
lightweight DUT .26
4.1.10 Test XIV — Hybrid-electric/fully-electric passenger car, sprung mass
(vehicle body), large and heavy DUT . 27
4.1.11 Test XVI — Hybrid-electric/fully-electric commercial vehicle, sprung mass
(vehicle body), large and heavy DUT .29
4.1.12 Test V — Passenger car, unsprung mass (wheel, wheel suspension), small
and lightweight DUT .30
4.1.13 Test IX — Commercial vehicle, unsprung mass, small and lightweight DUT . 32
4.1.14 Test VIII — Commercial vehicle, decoupled cab . 33
4.1.15 Test III — Passenger car, flexible plenum chamber .34
4.1.16 Test XI — Passenger car, solid intake manifold . 35
4.1.17 Test Ib – Rotating machines . 37
4.1.18 Test XII — Passenger car, exhaust pipe .40
4.1.19 Test X — Passenger car, components on fuel rail (gasoline engine with GDI-
system) .44
4.2 Mechanical shock .46
4.2.1 Shock I — Test for devices in or on doors and flaps on passenger cars .46
4.2.2 Shock II — Test for devices on rigid points on the body and on the frame . 47
4.2.3 Shock III — Test for devices in or on the gearbox . 47
4.3 Free fall .48
4.3.1 Purpose .48
4.3.2 Test . . .48
4.3.3 Selection of drop height .49
4.3.4 Requirements .49
4.4 Surface strength/scratch and abrasion resistance .50
4.4.1 Purpose .50
4.4.2 Test method . 50
4.4.3 Requirements .50
4.5 Gravel bombardment . 50
4.5.1 Purpose .50
4.5.2 Test method . 50
4.5.3 Requirements .50
5 Code letters for mechanical loads .51
iii
6 Documentation .58
Annex A (informative) Guidelines for the development of test profiles for vibration tests .59
Annex B (informative) Recommended mechanical requirements for equipment depending
on the mounting location .92
Annex C (informative) Guidelines for shaker testing of starter motors, alternators and
similar DUTs .93
Annex D (informative) Guidelines for free fall testing .99
Annex E (informative) 3D vibration testing for automotive components . 101
Bibliography . 104
iv
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
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 32,
Electrical and electronic components and general system aspects.
This fourth edition cancels and replaces the third edition (ISO 16750-3:2012), which has been
technically revised.
The main changes are as follows:
— integrating and harmonizing content from ISO 19453-3:2018;
— distinction between small and lightweight versus large and heavy DUTs;
— revising vibration profiles where necessary due to extended datasets of and experience from vehicle
measurements;
— addition of vibration test for rotating machines on combustion engines and Annex C;
— addition of vibration tests for hybrid-electric/fully-electric commercial vehicles;
— addition of guided fall test description and Annex D;
— addition of Annex E as guidance for 3D shaker testing;
— test order appearing in the document has been changed for a logical grouping depending on test
type, however test numbers have been kept for backwards compatibility.
A list of all parts in the ISO 16750 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.
v
INTERNATIONAL STANDARD ISO 16750-3:2023(E)
Road vehicles — Environmental conditions and testing for
electrical and electronic equipment —
Part 3:
Mechanical loads
1 Scope
This document applies to electric and electronic systems and components for vehicles including electric
propulsion systems and components with maximum working voltages according to voltage class B. It
describes the potential environmental stresses and specifies tests and requirements recommended for
the specific mounting location on/in the vehicle.
T
...