ISO/PAS 21779-1:2025

Road vehicles — Test method to evaluate the performance of acceleration control pedal error (ACPE) — Part 1: Car-to-car from standstill

This document specifies test methods to evaluate the behaviour of a vehicle equipped with an acceleration control pedal error (ACPE) system according to ISO/PAS 19486. Those forward and reverse accidents occur during a straight-line acceleration when the vehicle under test (VUT) accelerates due to driver misapplication of accelerator pedal instead of intended brake pedal. This document is limited to ACPE systems of light vehicles only classified in UN-ECE (TRANS/WP.29/1045) Vehicle: “Category 1-1 vehicle” and does not apply to such devices installed in vehicles of other categories, such as heavy vehicles or motorcycles. This document focuses on an important part of the vehicle behaviour during these collision scenarios, which is the capacity to avoid or mitigate the collision especially to the other vehicle.

Véhicules routiers — Méthode d'essai pour évaluer la performance du contrôle de l'accélération en cas d'erreur de pédale (ACPE) — Partie 1: Véhicule-véhicule à partir de l'arrêt

General Information

• Status: Published
• Publication Date: 26-May-2025
• ICS: 35.240.60 - IT applications in transport
• ICS: 43.040.15 - Car informatics. On board computer systems
• Technical Committee: ISO/TC 22/SC 33 - Vehicle dynamics and chassis components
• Drafting Committee: ISO/TC 22/SC 33/WG 3 - Driver assistance and active safety functions
• Current Stage: 6060 - International Standard published
• Start Date: 27-May-2025
• Due Date: 06-Dec-2026
• Completion Date: 27-May-2025

Standards Content (Sample)

Publicly
Available
Specification
ISO/PAS 21779-1
First edition
Road vehicles — Test method
2025-05
to evaluate the performance of
acceleration control pedal error
(ACPE) —
Part 1:
Car-to-car from standstill
Véhicules routiers — Méthode d'essai pour évaluer la
performance du contrôle de l'accélération en cas d'erreur de
pédale (ACPE) —
Partie 1: Véhicule-véhicule à partir de l'arrêt
Reference number
© ISO 2025
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ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Basic concept of the test . 3
5 Test conditions . 3
5.1 General .3
5.2 General data .3
5.3 Specifications of test vehicle .3
5.4 State of test vehicle .3
5.4.1 General .3
5.4.2 Load condition .4
5.4.3 Tyres .4
5.4.4 Braking system .4
5.4.5 Drive shaft .4
5.4.6 Engine setting, power character .4
5.4.7 Protection device .4
5.4.8 Setting of the ACPE device .4
5.5 Test course .4
5.5.1 Test track .4
5.5.2 Environment .5
5.6 Weather conditions .5
5.6.1 Temperature .5
5.6.2 Wind speed .5
5.6.3 Visibility .5
5.6.4 Conditions for test omission .5
5.7 Measurement items .5
5.8 Measurement equipment.5
6 Test method . 6
6.1 Test preparation .6
6.1.1 Initialization work .6
6.1.2 Break-in driving .6
6.1.3 Selection of test conditions .6
6.2 Testing .7
6.2.1 Rebreaking in .7
6.2.2 Setup of starting position of test driving .7
6.2.3 Brake temperature .7
6.2.4 EVT placement.7
6.2.5 Transmission .7
6.2.6 Moving to the starting position of test driving .7
6.2.7 Preparation at the starting point of test driving .7
6.2.8 Test driving .8
6.2.9 Number of tests .8
6.3 Confirmation of test results and record of test image .8
6.3.1 Measurement section .8
6.3.2 Arrangement of measurement data .8
6.3.3 Record of test image .8
6.3.4 Test validity confirmation .9
7 Records of test results . 9
7.1 Record of environmental conditions and others.9
7.2 Record of measurement values .9

iii
7.3 Test outcomes .9
Annex A (normative) Conditions of ACPE and specifications of the test vehicle .10
Annex B (normative) Performance test results of ACPE.11
Bibliography .13

iv
Foreword
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