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GB/T 41901.2-2022 English PDF (GBT41901.2-2022)

GB/T 41901.2-2022 English PDF (GBT41901.2-2022)

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GB/T 41901.2-2022: Road vehicles -- Extended vehicle(ExVe) methodology -- Part 2: Methodology for designing the extended vehicle

This document specifies the rules and basic principles of the design methodology of extended vehicles. This document is applicable to Category-M and Category-N vehicles.
GB/T 41901.2-2022
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 43.020
CCS T 40
Road Vehicles - Extended Vehicle (ExVe) Methodology - Part
2: Methodology for Designing the Extended Vehicle
(ISO 20077-2:2018, MOD)
ISSUED ON: OCTOBER 12, 2022
IMPLEMENTED ON: MAY 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of China.
Table of Contents
Foreword ... 4
Introduction ... 6
1 Scope ... 7
2 Normative References ... 7
3 Terms and Definitions ... 7
4 Abbreviations ... 8
5 Conventions for Identifying Rules and Basic Principles, and for Specifying Relevant Contents ... 8
6 Overview ... 9
6.1 Role of Design Methodology in the Design of Extended Vehicle ... 9
6.2 Main Content of Design Methodology of Extended Vehicle ... 9
6.3 Consideration of New Functionalities of Extended Vehicle ... 10
7 Rules ... 11
7.1 Overview ... 11
7.2 Safety-related Rules ... 12
7.3 Security-related Rules ... 13
8 Basic Principles ... 13
8.1 Overview ... 13
8.2 General Basic Principles ... 14
8.3 Life Cycle-related Basic Principles ... 14
8.4 Remote Access-related Basic Principles ... 16
8.5 Existing Design-related Basic Principles ... 17
8.6 Basic Principles Related to Interactions between Functionalities and Priority Management ... 19
8.7 Basic Principles Related to Resource Non-degradation and Availability ... 19 8.8 Basic Principles Related to Validation of Extended Vehicle Functionality... 21 8.9 Basic Principles Related to Prohibition of Monitoring ... 21
Appendix A (informative) A Comparison of Structural No. Between This Document and ISO 20077-2:2018 ... 22
Appendix B (informative) Design Methodology of Extended Vehicle - Technical Template ... 23
Appendix C (informative) Template for Technical Request ... 28
Appendix D (informative) Template for Technical Response ... 29
Bibliography ... 30
Road Vehicles - Extended Vehicle (ExVe) Methodology - Part
2: Methodology for Designing the Extended Vehicle
1 Scope
This document specifies the rules and basic principles of the design methodology of extended vehicles.
This document is applicable to Category-M and Category-N vehicles.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document through the normative references in this text. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 41901.1 Road Vehicles - Extended Vehicle (ExVe) Methodology - Part 1: General Information (GB/T 41901.1-2022, ISO 20077-1:2017, MOD)
3 Terms and Definitions
What is defined in GB/T 41901.1, and the following terms and definitions are applicable to this document.
3.1 Basic Principle
Basic principle refers to the design principle that is considered in the design of extended vehicles.
3.2 Life Cycle
Life cycle refers to the various situations that a vehicle can encounter throughout its life, including design, manufacture, customer use, maintenance, and recycling, etc. 3.3 Local Diagnostic Facilitator
Local diagnostic facilitator refers to a person who maintains communication with the remote technician and is able to perform the operations requested by the remote technician and answer questions of the remote technician, thereby facilitating the diagnosis. NOTE: the local diagnostic facilitator has the ability to understand and describe the contents displayed by the on-board instruments and signaling devices.
3.4 Operator
Operator refers to a person who operates, controls or serves extended vehicle while in the vehicle.
EXAMPLE: local diagnostic facilitator.
3.5 Requester
Requester refers to an enterprise or legal entity that proposes new functional requirements to the manufacturer of extended vehicles.
NOTE 1: when submitting the requirements, the vehicle manufacturer, which is a provider of after- sales service, is deemed as the demand-side.
NOTE 2: if the vehicle manufacturer is the same as the manufacturer of extended vehicle, its internal request process can be used.
3.6 Rule
Rule refers to the basic design requirement to be satisfied when designing extended vehicle. 4 Abbreviations
The following abbreviations are applicable to this document.
BP: Basic Principle
ECU: Electronic Control Unit
ExVe: Extended Vehicle
LDF: Local Diagnostic Facilitator
NUM: Number
R: Rule
5 Conventions for Identifying Rules and Basic Principles, and
for Specifying Relevant Contents
5.1 In this document, the rules and basic principles are expressed in the following mode: ?????? NUM: content of the rule or basic principle.
5.2 ?????? NUM represents the quoted rule (R) or basic principle (BP), in which: ---?????? is the letter used to identify the rule (R) or basic principle (BP); ---NUM is an integer, which is between 001 and 999 (inclusive), and used to identify the number of the rule or basic principle.
EXAMPLE: R 025 and R 026 are two different rules.
NOTE: rules and basic principles can be followed by explanatory text.
6 Overview
6.1 Role of Design Methodology in the Design of Extended Vehicle
This document aims to provide guidance for the design (physics, documentation, and support, etc.) of extended vehicles and their interfaces by specifying a general system of rules and basic principles. The manufacturer of extended vehicles shall formulate corresponding methods or processes in accordance with the rules and basic principles for the design of extended vehicles on the basis of specific use cases or scenarios.
Each manufacturer of extended vehicles generally regulates the working mode of the design process through a collaborative method and process, as it is shown in Figure 1. 6.2 Main Content of Design Methodology of Extended Vehicle
The design methodology of extended vehicle includes the following contents (see Figure 2): ---When proposing new functional requirements, a template for technical request used to fully describe the minimum information (see Appendix B and Appendix C); ---A system of rules and basic principles used to guide the new functional design of extended vehicle (see Chapter 7 and Chapter 8);
---When responding to new functional requirements, a template for technical response used to fully describe the minimum information (see Appendix B and Appendix D). by implementing the rules and basic principles of this document. The design methodology applies to the design or design alternations of extended vehicle, including direct or indirect communication between the vehicle the third party (for example, vehicle operator, vehicle owner, service provider or other related parties of extended vehicle).
The new functional requirements of extended vehicles may come from regulations, standards, and individual requests. The new functional requirements of extended vehicles shall be accurately described by the demand-side through the template for technical request for all necessary elements (for example, performance-related elements).
The design methodology also applies to the design of new interfaces for the remote communication of vehicles from regulatory requirements.
This document applies both to any request from the demand-side for new functionalities of extended vehicles, and also to situations where existing functionalities need to be extended or remotely used. For vehicles produced in multiple phases, this document applies to all relevant manufacturers. Simply adding new equipment to enable new functionality without regard to the existing design may not achieve the desired results. On the one hand, the new function may uncontrollably interfere with the original or existing functionalities. On the other hand, the original vehicle system usually does not have all the components required for the new function. The basic principle of the design methodology aims to emphasize the treatment of these risks. These rules and basic principles stipulated by this document aim to deal with the internal risks of extended vehicle caused by the new function of extended vehicle (whether this function already exists or not) in an appropriate mode. Measures that can be taken to manage these risks include, but are not limited to:
---Modify the existing electronic system (resources, etc.) of extended vehicle to implement new function;
---DO NOT configure new function;
---Configure new function, but only under specific conditions;
---Modify other existing functionalities.
Non-technical measures (for example, contractual measures) may also be used to manage risks, for example, associated with the degradation or destruction of existing functionalities or services.
7 Rules
7.1 Overview
The design methodology of extended vehicles, which is based on remote access, shall maintain the basic safety and security of the vehicle throughout the entire life cycle of the vehicle. Therefore, this document includes two rules (R 001 and R 002), which shall be adopted by the manufacturer of extended vehicles in the design methods and processes.
7.2 Safety-related Rules
R 001: when designing a new function of extended vehicle, the manufacturer of extended vehicle shall consider possible safety risks. Functionalities that affect safety shall be handled in accordance with the optimum safety practices.
When the manufacturer of extended vehicles is designing an extended vehicle, it shall consider the safety of the vehicle, drivers and passengers, operators and other users throughout the life cycle.
NOTE: some optimum safety practices can be found in some existing standards [for example, GB/T 34590 (all parts)].
When designing a new function for extended vehicles, the manufacturer of extended vehicle shall apply Rule R 001 in its design methods and processes.
When applying Rule R 001, the functionalities of extended vehicle can be classified on the basis of the following safety criteria:
---Functionalities of extended vehicle that have no impact on vehicle driving behavior, such as: entertainment information or functionalities that will not pose a risk of interference to the driver;
---Functionalities of extended vehicles that have an impact on vehicle safety, which may interact with the vehicle behaviors (such as: engine, brake, steering and suspension) or may distract the driver.
Such classification is determined by the inherent risk of the functionalities of extended vehicle, the risk in a specific situation or the risk of a specific functional operation (the same action may lead to different risks).
Examples of safety risks of vehicle in operation:
EXAMPLE 1: vehicle braking ability is affected.
EXAMPLE 2: inappropriate function, for example, bringing the vehicle to a sudden stop while driving on the road.
EXAMPLE 3: inappropriate function beyond the set parameters.
Examples of safety risks of stationary vehicle:
EXAMPLE 4: when the front seat is occupied, the airbag is falsely triggered. EXAMPLE 5: when the high-voltage battery is disconnected, a high-voltage component is methods and processes, the rules specified in this document shall always be satisfied. 8.2 General Basic Principles
BP 001: the manufacturer of extended vehicles is responsible for the design of extended vehicles.
BP 002: the manufacturer of extended vehicles is responsible for the design of all interfaces of extended vehicles, in order to realize the communication with the extended vehicle. BP 003: the manufacturer of extended vehicles is responsible for the realization of the functionalities of the extended vehicle.
The manufacturer of extended vehicles is responsible for the design of extended vehicles and their functionalities. Therefore, the manufacturer of extended vehicles is responsible for not only the realize of each function of the extended vehicle, but also the consistency of the entire function set.
When implementing a new function of extended vehicle in accordance with the methods specified in this document, the following objective limitations may exist: ---objective limitation of functional availability;
---objective limitation of functional performance;
---objective limitation caused by differences in vehicles and models, etc.; ---objective limitation caused by special market conditions.
8.3 Life Cycle-related Basic Principles
BP 004: the manufacturer of extended vehicles is responsible for assessing the impact of the new function on the extended vehicle throughout its life cycle.
When the demand-side is accessing data, the availability and expected performance of the required functionality of extended vehicle shall not be restricted throughout the life cycle. The manufacturer of extended vehicle shall analyze the impact of integrating this functionality throughout the vehicle?€?s life cycle (see Figure 3), so as to determine the incompatibilities that may arise in situations (for example, during the manufacturing, maintenance or recycling phase) not mentioned by the demand-side. The result of this analysis may result in reduced performance and availability of the required new functionality.
8.4 Remote Access-related Basic Principles
BP 005: the manufacturer of extended vehicles is responsible for managing the additional risk that arises because a certain existing functionality can be remotely used. It is possible that remote access will operate when the vehicle?€?s current state and the environment cannot be determined. Under certain circumstances, this may damage the vehicle, other vehicles or injure passengers and those around the vehicle. Therefore, prior to design, a basic analysis of other risks associated with the functionality of extended vehicle shall be performed.
Example of BP 005?€?s effect on R 001 ?€?safety-related rules?€? (see Figure 5): ---In the illustration in Figure 5, when the vehicle is diagnosed in the after-sales workshop (Scenario 1), the professionals can complete the visual inspection of the vehicle in advance, then, control the engine injector;
---When the vehicle is parked on the side of the road (Scenario 2), the same functionality can also be performed through remote access of the extended vehicle; however, in this scenario, if there is a fuel leak in the fuel injection system, then, the same control action will severely jeopardize the personnel and the environment;
---In Scenario 1, qualified professionals manage the safety chain by applying specific procedures and respond in emergency situations; in Scenario 2, if there is no local diagnostic facilitator, then, it is impossible to offer emergency treatment. The local diagnostic facilitator shall at least be able to understand or describe the indications of the on-board instruments and signaling devices.

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