1、BS ISO26021-4:2009ICS 43.040.80NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDRoad vehicles End-of-life activation ofon-board pyrotechnicdevicesPart 4: Additional communication linewith bidirectional communicationThis British Standardwas published under theauth
2、ority of the StandardsPolicy and StrategyCommittee on 30 June 2009 BSI 2009ISBN 978 0 580 58067 3Amendments/corrigenda issued since publicationDate CommentsBS ISO 26021-4:2009National forewordThis British Standard is the UK implementation of ISO 26021-4:2009.The UK participation in its preparation w
3、as entrusted to TechnicalCommittee AUE/16, Electrical and electronic equipment.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correc
4、t application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS ISO 26021-4:2009Reference numberISO 26021-4:2009(E)ISO 2009INTERNATIONAL STANDARD ISO26021-4First edition2009-05-15Road vehicles End-of-life activation of on-board pyrotechnic devices Part 4: Additional
5、communication line with bidirectional communication Vhicules routiers Activation de fin de vie des dispositifs pyrotechniques embarqus Partie 4: Ligne de communication additionnelle avec communication bidirectionnelle BS ISO 26021-4:2009ISO 26021-4:2009(E) PDF disclaimer This PDF file may contain em
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10、quester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reservedBS ISO 26021-4:2009ISO 26021-4:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword i
11、v Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions, abbreviated terms . 1 3.1 Terms and definitions. 1 3.2 Abbreviated terms 2 4 Conventions 2 5 Pyrotechnic device deployment via on-board diagnostic architecture 2 5.1 Vehicle system description . 2 5.2 Example of in-vehi
12、cle hardware and software provision . 3 5.3 Additional communication line . 3 6 ACL with bidirectional specification (Hardware description) 4 6.1 Connection to the vehicle 4 6.2 Physical layer 4 7 Deployment process with ACL and bidirectional communication 5 7.1 Deployment process overview. 5 7.2 Da
13、ta link layer 5 7.3 ACL step 1 request deployment sequence . 7 7.4 ACL step 2 deployment confirmation sequence 9 7.5 ACL step 3 deployment terminfation sequence . 9 7.6 Summary of data byte format transmitted during ACL steps 1, 2 and 3. 10 Bibliography . 11 BS ISO 26021-4:2009ISO 26021-4:2009(E) iv
14、 ISO 2009 All rights reservedForeword 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 interest
15、ed 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 Co
16、mmission (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 techn
17、ical 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 s
18、hall not be held responsible for identifying any or all such patent rights. ISO 26021-4 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 a
19、ctivation 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
20、BS ISO 26021-4:2009ISO 26021-4:2009(E) ISO 2009 All rights reserved vIntroduction Worldwide, nearly all new vehicles are equipped with one or more safety systems. This can include advanced protection systems based on pyrotechnic actuators. All components which contain pyrotechnic substances can be h
21、andled in the same way. Recycling these vehicles demands a new process to ensure that the deactivation of airbags is safe and cost-efficient. Due to the harmonization of the on-board diagnostic (OBD) interface, there is a possibility of using it for on-board deployment, which is based on the same to
22、ols and processes. Representatives of the global automobile industry agreed that automobile manufacturers do not support reuse as an appropriate treatment method for pyrotechnic devices, believe treatment of pyrotechnic devices is required before shredding, and support in-vehicle deployment as the p
23、referred method. Based on this agreement, the four big associations of automobile manufacturers (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 objective is that in th
24、e future a dismantler will use only one tool without any accessories to deploy all pyrotechnic devices inside an end-of-life vehicle (ELV) by using an existing interface to the car. Because of different requirements and safety concepts an additional communication line (ACL) is added to the basic CAN
25、 communication method. In this part of ISO 26021 ACL is used to mean an additional communication line with bidirectional communication. This bidirectional communication is used for systems with a specific concept that the initiation requires ECU acknowledgement. BS ISO 26021-4:2009BS ISO 26021-4:200
26、9INTERNATIONAL STANDARD ISO 26021-4:2009(E) ISO 2009 All rights reserved 1Road vehicles End-of-life activation of on-board pyrotechnic devices Part 4: Additional communication line with bidirectional communication 1 Scope This part of ISO 26021 defines the requirements of redundancy hardware or soft
27、ware systems independent from the controller area network (CAN) line, which are activated by the additional communication line (ACL hardware line). It also describes the additional sequences of the deployment process, and the technical details for the direct hardware connection between the pyrotechn
28、ic device deployment tool (PDT) and the pyrotechnic control unit (PCU). 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 the referenced
29、 document (including any amendments) applies. ISO 14230-1, Road vehicles Diagnostic Systems Keyword Protocol 2000 Part 1: Physical layer ISO 15031-3, Road vehicles Communication between vehicle and external equipment for emissions-related diagnostics Part 3: Diagnostic connector and related electric
30、al circuits, specification and use ISO 15765-3, Road vehicles Diagnostics on Controller Area Networks (CAN) Part 3: Implementation of unified diagnostic services (UDS on CAN) ISO 15765-4, Road vehicles Diagnostics on Controller Area Networks (CAN) Part 4: Requirements for emissions-related systems I
31、SO 26021-1, Road Vehicles End-of-life activation of on-board pyrotechnic devices Part 1: General information and use case definitions ISO 26021-2, Road Vehicles End-of-life activation of on-board pyrotechnic devices Part 2: Communication requirements ISO 26021-3, Road Vehicles End-of-life activation
32、 of on-board pyrotechnic devices Part 3: Tool requirements 3 Terms and definitions, abbreviated terms 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 14230-1, ISO 15031-3, ISO 15765-3, ISO 15765-4, ISO 26021-1, ISO 26021-2 and ISO 26021-3 apply. BS
33、 ISO 26021-4:2009ISO 26021-4:2009(E) 2 ISO 2009 All rights reserved3.2 Abbreviated terms ACL additional communication line PDT pyrotechnic device deployment tool PCU pyrotechnic control unit OBD on-board diagnostic OSI open systems interconnection 4 Conventions This International Standard is based o
34、n the conventions discussed in the OSI service conventions (ISO/IEC 10731) as they apply for diagnostic services. 5 Pyrotechnic device deployment via on-board diagnostic architecture 5.1 Vehicle system description This International Standard is based on an envisaged diagnostic network architecture i
35、n combination with the PCU deployment architecture, as described in this subclause. ISO 26021-2 defines the mandatory vehicle interface of the PCU and PDT. The PCU is connected with the vehicle diagnostic connector and the communication specifications comply with ISO 15765-3 and ISO 15765-4. The PDT
36、 communicates with the PCU on CAN_H and CAN_L and enables deployment with bidirectional communication. Depending upon the vehicle-specific architecture, the mandatory link of the PCU may be connected via a gateway to the OBD connector (see Figure 1), thus a CAN interface in the PCU for the mandatory
37、 link may not be required. Figure 1 Access to the vehicle via diagnostic connector BS ISO 26021-4:2009ISO 26021-4:2009(E) ISO 2009 All rights reserved 35.2 Example of in-vehicle hardware and software provision To execute the on-board deployment via the OBD link, the PCU software shall have full acce
38、ss to the output driver stage, which controls the deployment loops. To achieve this, the saving path is controlled via the ACL with a bidirectional signal (see Figure 2). Figure 2 Overview of hardware and software provision 5.3 Additional communication line Depending on the hardware architecture of
39、the PCU an additional signal is used. General requirements for the interface between deployment sequence and ACL sequence are given in Clauses 6 and 7. Figure 3 Integration of ACL communication into deployment process BS ISO 26021-4:2009ISO 26021-4:2009(E) 4 ISO 2009 All rights reservedThe standardi
40、zed steps specify the diagnostic sequence. The ACL communication step m is the specified place to enable the hardware saving possibility. 6 ACL with bidirectional specification (Hardware description) 6.1 Connection to the vehicle The connection to the vehicle shall be made using the connector specif
41、ied in ISO 15031-3. Table 1 shows the contact allocation according to ISO 15031-3 and additional communication line is assigned to contact 15. Table 1 Contact allocation of diagnostic connector Contact General allocation 1 Discretionary 2 Bus positive line of SAE J1850 3 Discretionary 4 Chassis grou
42、nd 5 Signal ground 6 CAN_H line of ISO 15765-4 7 K line of ISO 9141-2 and ISO 14230-4 8 Discretionary 9 Discretionary 10 Bus negative line of SAE J1850 11 Discretionary 12 Discretionary 13 Discretionary 14 CAN_L line of ISO 15765-4 15 L line of ISO 9141-2 and ISO 14230-4, ACL (optional) 16 Permanent
43、 positive voltage 6.2 Physical layer The physical layer of ACL with bidirectional communication shall be compliant with ISO 14230-1 and the details are shown in Figure 4. (Values for 24 V systems appear in parentheses.) If no ACL is supported, the line shall be held as high impedance for safety aspe
44、cts. Therefore, the PCU cannot receive the L-line signal for diagnostic purposes, even if the legacy scan tool applicable with ISO 14230-1 is connected to the PCU and, as a result, there is no influence on any scan tool in the field. During Sys-Init and documentation process, the battery voltage val
45、ue is read (see ISO 26021-2:2008, 8.4.2). The appropriate pull up resistor is chosen according to the battery voltage value. BS ISO 26021-4:2009ISO 26021-4:2009(E) ISO 2009 All rights reserved 5Figure 4 Physical layer of ACL with bidirectional communication 7 Deployment process with ACL and bidirect
46、ional communication 7.1 Deployment process overview After the PDT detects the PCU (connector C) the PDT continues the following steps to perform the deployment process. The main focuses in this document are the additional steps of ACL preparation and ACL steps 1 to 3. See ISO 26021-2 for detailed in
47、formation on standardized steps. a) ACL-Init ACL optional information is obtained by the ACL preparation process. The PDT shall skip ACL step 1 and proceed to connector (F) directly, if no ACL is selected. (Also ACL steps 2 and 3 shall be skipped.) If the ACL option is selected, the ACL option infor
48、mation specific to each PCU can be obtained in ACL step 1. b) Device deployment Before scrapping each device, ACL step 2 shall be executed for confirmation. c) Deployment termination of one PCU ACL step 3 shall be executed and the deployment of all devices controlled by the specific PCU is terminate
49、d. If there is more than one PCU, PDT shall proceed to connector (D) and the same process will be executed until all PCUs are terminated. 7.2 Data link layer ACL steps 1 to 3 with bidirectional communication, as shown in Figure 5, is originally prepared for airbag deployment and the details are shown in Figures 7 to 10. Figure 6 shows the byte format for bidirectional communication; the communication protocol is asynchronous communication without error check. Althou
