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HJ 1239.1-2021: Technical specification for emission remote supervision system of heavy-duty vehicles - Part 1: On-board terminal
HJ 1239.1-2021
ECOLOGICAL ENVIRONMENTAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Technical specification for emission remote supervision
system of heavy-duty vehicles - Part 1: On-board terminal
ISSUED ON: DECEMBER 27, 2021
IMPLEMENTED ON: JULY 01, 2022
Issued by: Ministry of Ecology and Environment
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions... 5 
4 General requirements ... 6 
5 Functional requirements ... 7 
6 Performance requirements ... 11 
7 Test methods ... 12 
8 Implementation requirements ... 13 
Appendix A (Normative) Test method of on-board terminal ... 14 
Appendix B (Normative) Test of on-board terminal security ... 17 
Appendix C (Normative) Test of data transmission, positioning, data consistency ... 20 
Technical specification for emission remote supervision
system of heavy-duty vehicles - Part 1: On-board terminal
1 Scope
This standard specifies the technical requirements for on-board terminals of emission
remote monitoring systems of heavy-duty vehicle, including functions, performance
requirements, test methods.
This standard applies to equipment, which is installed on heavy-duty vehicles, for
collecting, storing, transmitting vehicle's OBD information and engine emission data.
2 Normative references
This standard refers to the following documents or clauses thereof. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB 17691 Limits and measurement methods for emissions from diesel fueled
heavy-duty vehicles (CHINA VI)
GB/T 2423.18 Environmental testing - Part 2: Test methods - Test Kb: Salt mist,
cyclic (sodium chloride solution)
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 28046.1 Road vehicles - Environmental conditions and testing for electrical
and electronic equipment - Part 1: General
GB/T 32960.2 Technical specifications of remote service and management system
for electric vehicles - Part 2: On-board terminal
GB/T 32960.3 Technical specifications of remote service and management system
for electric vehicles - Part 3: Communication protocol and data format
GB/T 37027 Information security technology - Specifications of definition and
description for network attack
ISO 9001 Quality management system
ISO 14001 Environmental management system
GM/T 0008 Cryptography test criteria for security IC
GM/T 0009 SM2 Cryptography algorithm application specification
3 Terms and definitions
The terms and definitions, which are defined in GB 17691, as well as the following
terms and definitions, apply to this standard.
3.1
Heavy-duty vehicles (HDV)
Heavy-duty vehicles in this standard refer to vehicles, that undergo type inspection
and information disclosure, in accordance with the technical requirements specified
in GB 17691, including compression-ignition engine vehicles, gas-fuel ignition
engine vehicles, dual-fuel vehicles, hybrid electric vehicles.
3.2
On-board terminal
Equipment, which is installed on heavy-duty vehicles, to collect, store, transmit
vehicle's on-board diagnostic system (OBD) information and engine emission data,
AND shall not be artificially removed. It is a pollution control device.
3.3
Digital signature
Data attached to a data unit, or a cryptographic conversion of a data unit. Such data
or conversion allows the receipt of the data unit to confirm the origin and integrity
of the data unit AND to protect the data from forgery or denial by a person (such as
the recipient).
3.4
Key
A sequence of symbols, which are used to control cryptographic transformation
operations (such as encryption, decryption, cryptographic verification function
computation, signature generation, or signature verification). It is an asymmetric key
pair, which consists of a public and private key. The private key is used for signature
or decryption, which shall not be disclosed. The public key is used for signature
verification or encryption.
3.5
Time to first fix (TTFF)
The time to obtain the correct fix, after the navigation receiver is powered on.
3.6
Re-get time
After a brief interruption of the satellite signal, the time when the navigation receiver
reacquires the satellite signal AND determines its current position.
3.7
Real-time kinematic (RTK)
The carrier phase difference technology, which is a difference method for processing
the carrier phase observations of two measuring stations in real time. It sends the
carrier phase, which is collected by the base station, to the user receiver, to calculate
the difference and resolve the coordinates.
4 General requirements
4.1 The on-board terminals for emission remote monitoring of heavy-duty vehicles shall
meet the requirements of GB 17691; meet the functional requirements, which are
specified in Chapter 5 of this standard; meet the performance requirements, which are
specified in Chapter 6.
4.2 In principle, the original OBD interface shall not be occupied, by the installation of
the on-board terminal for emission remote monitoring. If it is required to be occupied,
an OBD interface, that meets the relevant standards, shall be reserved separately.
4.3 Vehicle manufacturers shall install alarm light-related indicators, in prominent
positions, such as on-board terminals, dashboards or display panels. Owners of heavy-
duty vehicles can use the alarm lights and other indicators of on-board terminals, to
know the networking situation of on-board terminals, in real time.
4.4 The on-board terminal shall have anti-dismantling technical measures, to ensure
that the on-board terminal cannot be dismantled, without the authorization of the
vehicle manufacturer.
4.5 The on-board terminal shall ensure the data quality of the collected data. The service
life shall not be less than 7 years.
4.6 The vehicle manufacturer shall carry out the function and performance test of the
on-board terminal; the test method shall meet the provisions of Chapter 7.
5.6 Data retransmission
When the data communication link is abnormal, the on-board terminal shall store the
emission remote monitoring data locally. After the data communication link returns to
normal, the stored data is retransmitted. The data to be retransmitted shall be the data,
which is stored during the abnormal period of the communication link, within 5 × 24
hours before the time of restoration of communication. The data format is the same as
that of real-time transmission data. The data retransmission shall be carried out,
according to the specified communication protocol.
5.7 Alarm of removal
When the on-board terminal fails or is dismantled, the vehicle shall activate the driver
alarm system. If the technology allows, the removal alarm information can be
transmitted to the Ministry of Ecology and Environment, according to the prescribed
communication protocol. The alarm information includes the removal status, removal
time, positioning latitude and longitude information.
6 Performance requirements
6.1 Adaptability
According to the provisions of Appendix Q.7 of GB 17691, the electrical adaptability,
environmental adaptability, electromagnetic compatibility of the on-board terminal
shall meet the requirements of 4.3.1 ~ 4.3.3 in GB/T 32960.2. Among them, for
electromagnetic c...