oSIST prEN ISO 23308-4:2025

Energy efficiency of industrial trucks - Test methods - Part 4: Variable-reach rough-terrain trucks (ISO/DIS 23308-4:2025)

This document specifies the method of fuel consumption measurement for rough terrain- truck variable-reach trucks as defined in ISO 5053-1, herein after referred to as trucks. It does not apply to slewing trucks having a movement of more than 5° either side of the longitudinal axis.
This part is intended to be used in conjunction with ISO 23308-1. Where the requirements of this part differ from that in part 1, requirements in this part 4 will take precedence.

Energieeffizienz von Flurförderzeugen - Prüfverfahren - Teil 4: Geländegängige Flurförderzeuge mit veränderlicher Reichweite (ISO/DIS 23308-4:2025)

Efficacité énergétique des chariots de manutention - Méthodes d'essai - Partie 4: Chariots tout-terrain à portée variable (ISO/DIS 23308-4:2025)

Vozila za talni transport - Energijska učinkovitost - Preskusne metode - 4. del: Terenska vozila za talni transport s spremenljivim dosegom (ISO/DIS 23308-4:2025)

General Information

• Status: Not Published
• Public Enquiry End Date: 30-Jul-2025
• ICS: 27.015 - Energy efficiency. Energy conservation in general
• ICS: 53.060 - Industrial trucks
• Technical Committee: DTN - Lift and transport appliances
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 18-Jun-2025
• Due Date: 05-Nov-2025
• Completion Date: 04-Aug-2025
• Ref Project: prEN ISO 23308-4 - Energy efficiency of industrial trucks - Test methods - Part 4: Variable-reach rough-terrain trucks (ISO/DIS 23308-4:2025)

Relations

• Revises: SIST EN 16796-4:2019 - Energy efficiency of industrial trucks - Test methods - Part 4: Variable-reach rough-terrain trucks
• Effective Date: 03-Sep-2025

Overview

The draft international standard oSIST prEN ISO 23308-4:2025:2025 focuses on defining a consistent and reliable method for measuring fuel consumption in variable-reach rough-terrain industrial trucks. Developed by ISO Technical Committee 110/SC 4 and circulated by CEN, this document specifically targets trucks as defined in ISO 5053-1, excluding those with slewing movements greater than 5° from the longitudinal axis. It supplements and takes precedence over ISO 23308-1 where requirements differ.

This standard aims to promote the energy efficiency of industrial trucks by establishing uniform test protocols that enable manufacturers, regulatory bodies, and users to assess fuel consumption performance accurately. It forms part 4 of the ISO 23308 series dedicated to energy efficiency test methods across various truck types.

Key Topics

• Scope and Applicability: Addresses rough-terrain trucks with variable reach but excludes slewing trucks exceeding ±5° motion.
• Test Conditions: Specifies requirements for test areas (flat, hard surfaces like concrete or asphalt), test tracks, load conditions (generally 70% rated load), and truck readiness (e.g., new tires, manufacturer settings).
• Testing Procedure:
  • Defines truck duty phases such as traveling, idling, pick and carry, and bucket operation.
  • Emphasizes repeatability and comparability for fuel consumption measurement.
• Equipment Setup: Requires trucks to be representative production samples with appropriate run-in times and in fully functional condition.
• Calculation of Emissions: Includes methods to calculate CO emissions alongside fuel consumption.
• Documentation and Reporting: Mandates detailed reporting and declaration for transparency and traceability.
• Normative References: Relies on established ISO documents for vocabulary, safety requirements, and general energy efficiency test methods.

Applications

This standard is highly relevant for:

• Industrial Truck Manufacturers: Facilitates design and validation of energy-efficient rough-terrain variable-reach trucks, enabling market competitiveness through standardized performance data.
• Market Surveillance Authorities: Provides a benchmark for regulating compliance with energy consumption limits and environmental standards.
• Fleet Operators and Industrial Users: Enables informed procurement decisions based on standardized fuel efficiency metrics, optimizing operational costs and reducing environmental impact.
• Consultants and Service Providers: Offers a reliable framework for advising on energy optimization and sustainable industrial vehicle usage.

By implementing these test methods, stakeholders can assess and compare fuel usage, enforce regulations, and implement eco-friendly technologies such as eco-modes designed to reduce consumption.

Related Standards

• ISO 23308-1:2020 - General test methods for energy efficiency of industrial trucks, acting as the foundational document to which this part 4 is supplementary.
• ISO 5053-1 - Vocabulary defining the types of industrial trucks, crucial for clarifying the trucks covered.
• ISO 10896-1 - Safety requirements and verification for variable-reach rough-terrain trucks.
• ISO 3691-1 & ISO 3691-2 - Specifications regarding rated load, lift height, and load center distances relevant for test load settings.

This draft standard helps ensure consistency in measuring fuel consumption across rough-terrain variable-reach trucks, supporting the global push towards energy-efficient industrial vehicles.

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Keywords: energy efficiency industrial trucks, fuel consumption measurement, variable-reach rough-terrain trucks, ISO 23308-4, industrial truck test methods, fuel consumption testing, eco-mode, industrial vehicle emissions, ISO standards industrial trucks.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2025
Vozila za talni transport - Energijska učinkovitost - Preskusne metode - 4. del:
Vozila za talni transport s spremenljivim dosegom (ISO/DIS 23308-4:2025)
Energy efficiency of industrial trucks - Test methods - Part 4: Variable-reach rough-
terrain trucks (ISO/DIS 23308-4:2025)
Energieeffizienz von Flurförderzeugen - Prüfverfahren - Teil 4: Geländegängige
Flurförderzeuge mit veränderlicher Reichweite (ISO/DIS 23308-4:2025)
Efficacité énergétique des chariots de manutention - Méthodes d'essai - Partie 4:
Chariots tout-terrain à portée variable (ISO/DIS 23308-4:2025)
Ta slovenski standard je istoveten z: prEN ISO 23308-4
ICS:
27.015 Energijska učinkovitost. Energy efficiency. Energy
Ohranjanje energije na conservation in general
splošno
53.060 Industrijski tovornjaki Industrial trucks
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 23308-4
ISO/TC 110/SC 4
Energy efficiency of industrial
Secretariat: AFNOR
trucks — Test methods —
Voting begins on:
Part 4: 2025-06-09
Variable-reach rough-terrain trucks
Voting terminates on:
2025-09-01
Efficacité énergétique des chariots de manutention — Méthodes
d'essai —
Partie 4: Chariots tout-terrain à portée variable
ICS: 53.060
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
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 SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 23308-4:2025(en)
DRAFT
ISO/DIS 23308-4:2025(en)
International
Standard
ISO/DIS 23308-4
ISO/TC 110/SC 4
Energy efficiency of industrial
Secretariat: AFNOR
trucks — Test methods —
Voting begins on:
Part 4:
Variable-reach rough-terrain trucks
Voting terminates on:
Efficacité énergétique des chariots de manutention — Méthodes
d'essai —
Partie 4: Chariots tout-terrain à portée variable
ICS: 53.060
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 23308-4:2025(en)
ii
ISO/DIS 23308-4:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test conditions . 1
4.1 General .1
4.2 Test equipment .2
4.2.1 Test area .2
4.2.2 Test track .2
4.2.3 Test load and / or towing capacity .2
4.3 Truck conditions .2
4.4 Test conditions .2
5 Measurement procedure . 3
5.1 General .3
5.2 Truck duty phases .3
5.2.1 General .3
5.2.2 Phase 1 – Travelling .3
5.2.3 Phase 2 – Idle mode.3
5.2.4 Phase 3 – Pick and carry . .3
5.2.5 Phase 4 – Bucket mode .4
5.3 Test layout .4
6 Calculation of CO emission . 6
7 Documentation . 6
7.1 Report .6
7.2 Declaration .6
Bibliography . 7

iii
ISO/DIS 23308-4:2025(en)
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).
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
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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 110 Industrial trucks, Subcommittee
SC 4 Rough-terrain trucks.
A list of all parts in the ISO 23308 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.

iv
ISO/DIS 23308-4:2025(en)
Introduction
The ISO 23308 series deals with energy efficiency of industrial trucks including batteries and chargers.
ISO 23308-1 contains the procedures to determine the efficiency of trucks, traction batteries and battery
chargers. The other parts provide a specific test cycle for different truck types.
NOTE The test cycles are based on the VDI 2198 guideline. This guideline is widely accepted by the industry and is
used to measure the energy consumption of electric industrial trucks and internal combustion (IC) industrial trucks.
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