National foreword

This British Standard is the UK implementation of ISO 22139:2022.

The UK participation in its preparation was entrusted to Technical Committee AUE/15, Safety related to vehicles.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2022.

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 33, Vehicle dynamics and chassis components.

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.

1 Scope

This document specifies a test method for steering effort measurement when manoeuvring a vehicle at low speed or with the vehicle stationary. It is mainly applicable to trucks having a mass exceeding 3,5 tonnes and buses and articulated buses having a mass exceeding 5 tonnes, according to ECE and EC vehicle classification, i.e. categories M3, N2, N3.

This document can also be applicable to trucks having a mass not exceeding 3,5 tonnes and buses and articulated buses having a mass not exceeding 5 tonnes, i.e. categories M2, N1.

2 Normative references

3 Terms and definitions

4 Principle

5 Variables

6 Measuring equipment

6.1 Description

6.2 Transducer installations

6.3 Data processing

7 Test conditions

7.1 General

7.2 Test track when manoeuvring at low speed

7.3 Test track with stationary vehicle

7.4 Test vehicle

8 Test procedure

8.1 Preparation of test vehicle

8.2 Warm-up

8.3 Measurement with a stationary vehicle

8.4 Measurement when manoeuvring at low speed

9 Data evaluation and presentation of results

9.1 Time histories

9.2 Maximum steering-wheel torque vs. steering-wheel speed

9.3 Catch up steering-wheel speed

9.4 Cartesian coordinates

9.5 Maximum steering-wheel torque (M_HmaxLand M_HmaxR)

9.6 Steering-wheel work when steering OUT (W_H_OutLand W_H_OutR)

9.7 Steering-wheel torque when steering IN (M_{H 0L} and M_{H 0R})

9.8 Steering work when steering IN (W_{H InL} and W_{H InR})

9.9 Steering return ability

9.10 Steering-wheel torque variation ∆M_Hmax / M_Hmax_(%)

Bibliography

BS ISO 22139:2022

Heavy commercial vehicles and buses. Test method for steering effort measurement when manoeuvring at low speed or with stationary vehicle

Current

Published:

31 Jul 2022