Road vehicles -- End-of-life activation of on-board pyrotechnic devices

ISO 26021-1:2008 gives an overview of the structure of ISO 26021 and the way it has been divided into parts, as well as showing the relationship between the parts. In addition, it outlines the use case scenarios in which the ISO 26021 document set will be used. It also defines terminology that is used throughout the ISO 26021 document set.

Véhicules routiers -- Activation de fin de vie des dispositifs pyrotechniques embarqués

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Status
Published
Publication Date
27-Apr-2008
Current Stage
9092 - International Standard to be revised
Start Date
29-Jun-2020
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ISO 26021-1:2008 - Road vehicles -- End-of-life activation of on-board pyrotechnic devices
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INTERNATIONAL ISO
STANDARD 26021-1
First edition
2008-05-15
Road vehicles — End-of-life activation of
on-board pyrotechnic devices —
Part 1:
General information and use case
definitions
Véhicules routiers — Activation de fin de vie des dispositifs
pyrotechniques embarqués —
Partie 1: Informations générales et définitions de cas d'usage
Reference number
ISO 26021-1:2008(E)
ISO 2008
---------------------- Page: 1 ----------------------
ISO 26021-1:2008(E)
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ii © ISO 2008 – All rights reserved
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ISO 26021-1:2008(E)
Contents Page

Foreword............................................................................................................................................................ iv

Introduction ........................................................................................................................................................ v

1 Scope ..................................................................................................................................................... 1

2 Normative references ........................................................................................................................... 1

3 Terms and definitions........................................................................................................................... 2

4 Symbols and abbreviated terms ......................................................................................................... 2

5 Conventions .......................................................................................................................................... 3

6 Document overview.............................................................................................................................. 3

7 Use case descriptions.......................................................................................................................... 3

7.1 Overview ................................................................................................................................................ 3

7.2 End-of-life activation of on-board pyrotechnic devices — Use cases ............................................ 4

7.2.1 Use case summary ............................................................................................................................... 4

7.2.2 Use case 1: Information about standard communication ................................................................ 4

7.2.3 Use case 2: Information about use of the ACL as a data communication line .............................. 5

7.2.4 Use case 3: Information about use of the ACL as a signal wire ...................................................... 5

8 Airbag deployment via on-board diagnostic architecture................................................................ 5

8.1 Configuration ........................................................................................................................................ 5

8.2 Example of a basic configuration ....................................................................................................... 6

8.3 Additional communication line ........................................................................................................... 7

8.3.1 Example of a hardware configuration with an ACL........................................................................... 7

8.3.2 Use of the ACL as a bidirectional communication line..................................................................... 7

8.3.3 Use of the ACL for pulse width modulated signals........................................................................... 7

Bibliography ....................................................................................................................................................... 8

© ISO 2008 – All rights reserved iii
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ISO 26021-1:2008(E)
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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

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.

ISO 26021-1 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3,

Electrical and electronic equipment.

ISO 26021 consists of the following parts, under the general title Road vehicles — End-of-life activation of

on-board pyrotechnic devices:
⎯ Part 1: General information and use case definitions
⎯ Part 2: Communication requirements
⎯ Part 3: Tool requirements
⎯ Part 4: Additional communication line with bidirectional communication
⎯ Part 5: Additional communication line with pulse width modulated signal

NOTE Additional parts will be introduced as necessary to take into account requirements not yet covered by the

standard.
iv © ISO 2008 – All rights reserved
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ISO 26021-1:2008(E)
Introduction

ISO 26021 describes a method for the in-vehicle deployment of pyrotechnically activated components (also

referred to as pyrotechnic components or pyrotechnic devices) in cars.

Worldwide, nearly all new vehicles are equipped with one or more safety systems. Advanced protection

systems using pyrotechnic actuators are becoming more common. All components which contain pyrotechnic

substances should be handled in the same way.

Recycling of these vehicles requires a new process which ensures that the deployment of all the pyrotechnic

components will be safe and cost-efficient. Based on the harmonization of the on-board diagnostics (OBD)

interface, there is an opportunity to use this interface for on-board deployment, utilizing the same tools and

processes.

The representatives of the global automobile industry have decided the following:

⎯ automobile manufacturers do not support reuse as an appropriate treatment method for pyrotechnic

devices;

⎯ automobile manufacturers believe treatment of pyrotechnic devices is required before shredding;

⎯ automobile manufacturers support in-vehicle deployment as the preferred method.

Based on this decision, the four major automobile manufacturer associations (ACEA, Alliance, JAMA and

KAMA) started to develop a method for the in-vehicle deployment of pyrotechnic components in cars with the

pyrotechnic device deployment tool (PDT). The vision is that, one day, a dismantler will need only one tool

without any accessories in order to deploy all the pyrotechnic devices inside an end-of-life vehicle (ELV). The

target is to use an existing interface to the car.

This International Standard has been developed in order to define common requirements for communication

between the tool and the pyrotechnic control unit (PCU) when deploying pyrotechnic devices. This

communication should use earlier standardized hardware and software. Based on emissions-related

diagnostics (see ISO 15031-3), the physical layer specified for legislated OBD and the diagnostic connector

was defined. The software used is an implementation of diagnostic services and transaction protocols on CAN.

Because of the automobile manufacturers' specific requirements and safety concepts, an additional

communication line (ACL) may be used beside the basic CAN communication method. This line is usable in

two different ways:

⎯ as an additional communication line with bidirectional communication for additional communication

functions;

⎯ as an additional communication line with a pulse width modulated signal for hardware safing.

Although primarily intended for airbag deployment systems, ISO 26021 has also been developed to meet

requirements for other pyrotechnically activated systems.
© ISO 2008 – All rights reserved v
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ISO 26021-1:2008(E)

To achieve this, this International Standard makes use of on-board diagnostics and is based on the open

systems interconnection (OSI) basic reference model in accordance with ISO/IEC 7498-1 and ISO/IEC 10731

which structures communication systems into seven layers. When mapped on this model, the services used

by a diagnostic tester (client) and an electronic control unit (ECU) (server) are broken down in accordance

with Table 1, as follows:

⎯ a pyrotechnic devices deployment application using application services, specified in this International

Standard;
⎯ application services (layer 7), specified in ISO 14229-1;
⎯ communication services (layers 1 to 6).

Table 1 — Deployment of pyrotechnic devices — Specifications applicable to the OSI layers

Applicability OSI layer Airbag deployment application
User application ISO 26021-1
Application (layer 7) ISO 14229-1/ISO 15765-3
Presentation (layer 6) —
Seven layers in
Session (layer 5) ISO 14229-1
accordance with
Transport (layer 4) ISO 15765-2
ISO/IEC 10731
Network (layer 3) ISO 15765-2
Data link (layer 2) ISO 11898/ISO 26021-4 and ISO 26021-5
Physical (layer 1) ISO 11898/ISO 26021-4 and ISO 26021-5

For the deployment of pyrotechnic devices via on-board diagnostics by a dismantler, it is required that future

modifications to this International Standard provide long-term backwards compatibility.

vi © ISO 2008 – All rights reserved
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INTERNATIONAL STANDARD ISO 26021-1:2008(E)
Road vehicles — End-of-life activation of on-board pyrotechnic
devices —
Part 1:
General information and use case definitions
1 Scope

This part of ISO 26021 gives an overview of the structure of ISO 26021 and the way it has been divided into

parts, as well as showing the relationship between the parts. In addition, it outlines the use case scenarios in

which the ISO 26021 document set will be used. It also defines terminology that is used throughout the

ISO 26021 document set.
2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of

...

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