GB/T 19752-2024 English PDF (GB/T19752-2024)

GB/T 19752-2024: Hybrid electric vehicles - Power performance - Test method
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GB/T 19752-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.120
CCS T 47
Replacing GB/T 19752-2005
Hybrid Electric Vehicles - Power Performance - Test Method
ISSUED ON. AUGUST 23, 2024
IMPLEMENTED ON. MARCH 1, 2025
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 5
4 Test Conditions... 6
4.1 Requirements for Test Vehicle... 6
4.2 Environmental Conditions... 6
4.3 Measurement Parameters, Units and Accuracy... 7
4.4 Road Conditions... 8
5 Preparation of Test Vehicle... 9
5.1 Charging of REESS... 9
5.2 Preheating... 10
5.3 Vehicle Test Mass and Load Distribution... 10
6 Determination of Test Items... 11
7 Test Methods... 12
7.1 General Rules... 12
7.2 Maximum Thirty-minutes Speed Test in the Hybrid Mode... 13
7.3 Maximum Speed Test in the Hybrid Mode... 14
7.4 Acceleration Ability Test in the Hybrid Mode... 16
7.5 Maximum Gradability Test in the Hybrid Mode... 19
7.6 Hill Starting Ability Test in the Hybrid Mode... 21
Appendix A (normative) Determination Method for the Correction Factor of Circular
Roads... 22
Appendix B (informative) Test Record Formats... 23
Bibliography... 28
Hybrid Electric Vehicles - Power Performance - Test Method
1 Scope
This document describes the test method for the power performance of hybrid electric vehicles.
This document is applicable to Category-M and Category-N hybrid electric vehicles.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the 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 3730.1 Terms and Definitions of Motor Vehicles, Trailers and Combination Vehicle - Part
1.Types
GB/T 3730.2 Road Vehicle - Masses - Vocabulary and Codes
GB/T 8170 Rules of Rounding off for Numerical Values and Expression and Judgement of
Limiting Values
GB/T 12428 Laden Mass Calculating Method for Buses
GB/T 12534 Motor Vehicles - General Rules of Road Test Method
GB/T 12545.1 Measurement Methods of Fuel Consumption for Automobiles - Part 1.
Measurement Methods of Fuel Consumption for Passenger Cars
GB 18352.6-2016 Limits and Measurement Methods for Emissions from Light-duty Vehicles
GB/T 18385 Battery Electric Vehicles - Power Performance - Test Method
GB/T 19596-2017 Terminology of Electric Vehicles
GB/T 27840-2021 Fuel Consumption Test Methods for Heavy-duty Commercial Vehicles
3 Terms and Definitions
The terms and definitions defined in GB/T 19596-2017, GB/T 18385, GB/T 3730.1 and GB/T
3730.2, and the following are applicable to this document.
3.1 rechargeable electrical energy storage system; REESS
An energy storage system that is rechargeable and can provide electrical energy.
[source. GB 18384-2020, 3.1]
3.2 hybrid mode
A working mode, in which, all on-board systems, including the internal combustion engine (or
other heat engine) and drive motor, simultaneously provide energy to the vehicle or drive the
vehicle in accordance with the management logic (vehicle control strategy).
3.3 pure thermal mode
A working mode, in which, the vehicle is merely driven by the internal combustion engine (or
other heat engine).
3.4 pure electric mode
A working mode, in which, the vehicle does not consume fuel, and merely obtains energy from
the rechargeable energy / energy storage device, which drives the vehicle.
4 Test Conditions
4.1 Requirements for Test Vehicle
4.1.1 The specifications and filling amounts of lubricating oil and coolant for mechanical
moving components shall comply with the vehicle manufacturer's provisions.
4.1.2 Except for the purpose of driving, all energy storage systems shall be charged to the values
specified by the vehicle manufacturer (electrical energy, hydraulic pressure and pneumatic
pressure, etc.).
4.1.3 Before the test, the test vehicle shall be run-in, and it may also be run-in in accordance
with the technical requirements of the vehicle manufacturer. If the vehicle is installed with
REESS, the run-in shall be carried out with the REESS installed, and the run-in mileage needs
to be greater than 300 km. Meanwhile, for the plug-in hybrid electric vehicles, the REESS shall
undergo the process of discharging from the fully charged state to the state of charge alarm or
electric quantity balance at least once, so as to confirm that the REESS charging and discharge
is normally working; for rechargeable hybrid vehicles that cannot be externally connected,
check to confirm that the electric quantity display and charging and discharging are normally
working.
4.1.4 The trailer matched to the tractor shall not increase the windward area of the tractor or
adopt a trailer recommended by the vehicle manufacturer for the test.
4.2 Environmental Conditions
4.2.1 Air density
4.4 Road Conditions
4.4.1 Overall requirements
The test shall be carried out on dry straight roads, circular roads and test rampways. The road
surface shall be solid, smooth, clean and have good adhesion properties.
4.4.2 Road conditions for maximum speed test
4.4.2.1 Straight roads
4.4.2.1.1 Length of measurement zone
The length of the measurement zone shall be at least 200 m and marked with benchmarks.
4.4.2.1.2 Length of acceleration zone
The acceleration zone shall have the same characteristics as the measurement zone, and the
length shall ensure that the vehicle can accelerate to the maximum speed that the vehicle can
reach and stably drive for at least 200 m before entering the measurement zone.
4.4.2.1.3 Slope
The longitudinal slope of the last 200 m of the acceleration zone and the measurement zone
shall not exceed 0.5%. The transverse slope of the measurement zone shall not exceed 3%.
When the test is conducted in one direction, the longitudinal slope of the straight road shall not
exceed 0.1%.
4.4.2.1.4 Selection of straight-line segment on circular roads
If a part of the circular road satisfies the requirements of 4.4.2.1.1 ~ 4.4.2.1.3, and its centrifugal
inertia reaction force is less than 20% of the test mass of the vehicle and can be compensated
by the transverse slope of the road, then, this part of the circular road can be used as a straight
road measurement zone.
4.4.2.2 Circular roads
4.4.2.2.1 Length of circular roads
The length of the circular roads shall be not less than 2,000 m.
The circular roads are formed by connecting the straight part and approximately circular part.
The radius of curvature of the circular part shall be not less than 200 m, so as to ensure that the
centrifugal force while the vehicle is driving is compensated by the transverse slope of the road,
so that the vehicle can maintain normal driving in the lane when the driver does not perform
any operation on the steering wheel during the test.
manufacturer, check whether the REESS is normally charging and discharging.
5.1.2 Regular charging
Regular charging should adopt the AC charging mode. If the vehicle has a DC charging mode,
in accordance with the vehicle manufacturer’s recommendations, the DC charging mode may
be selected.
In accordance with the vehicle manufacturer's recommendations, select one of the following
modes for charging.
a) On-board charger (if equipped);
b) External charger recommended by the vehicle manufacturer.
The above-mentioned charging procedures do not include any automatically or manually
initiated special charging procedures, for example, equalizing charging mode or maintenance
mode.
5.1.3 Criteria for end of charging
When the on-board or external instrument shows that the REESS is fully charged, it shall be
judged that charging is complete. If the on-board or external instrument sends an obvious signal
indicating that the REESS is not fully charged, in this case, the maximum charging time (h) is.
3  REESS energy (kW  h) specified by the vehicle manufacturer/supply power (kW).
5.2 Preheating
Immediately before the test, in the hybrid mode, in accordance with the vehicle manufacturer’s
recommendations or an appropriate mode, preheat the vehicle systems and components that
may affect the test results, so as to achieve the stable temperature conditions recommended by
the vehicle manufacturer. The preheating mode shall be indicated in the record.
5.3 Vehicle Test Mass and Load Distribution
5.3.1 Test mass and load distribution requirements for various categories of vehicles
5.3.1.1 Category-M1 vehicles and Category-N1 vehicles with a maximum design total mass
less than 2 t
When the maximum design loading mass of the vehicle is less than or equal to 180 kg, the test
mass shall be the curb weight of the complete vehicle plus the maximum design loading mass.
When the maximum design loading mass of the vehicle is greater than 180 kg but less than or
equal to 360 kg, the test mass shall be the curb weight of the complete vehicle plus 180 kg.
When the maximum design loading mass of the vehicle is greater than 360 kg, the test mass of
the vehicle shall be the curb weight of the complete vehicle plus 50% of the maximum design
loading mass.
power performance test in accordance with the requirements of GB/T 18385, it will not
automatically switch to other power system working modes (hybrid mode or pure thermal
mode), then, the power performance test of the vehicle in the pure electric mode shall also be
carried out. For specific test items, see 6.1.Otherwise, the test vehicle may be exempted from
the power performance test in the pure electric mode or the test items that cannot be performed.
The specific test methods corresponding to the various tests in the pure electric mode shall be
consistent with the test methods specified in GB/T 18385.
7 Test Methods
7.1 General Rules
7.1.1 At ambient temperature, tyre pressure shall comply with the vehicle manufacturer’s
provisions. When carrying out the rampway test, the tyre pressure shall be the tyre inflation
pressure specified by the vehicle manufacturer in a cold state plus an additional 20 kPa; the tyre
tread depth shall be at least 75% of the original tread depth and the tread shall be in good
condition.
7.1.2 The vehicle shall be prepared and preheated in accordance with the provisions of Chapter
5.
7.1.3 In addition to the necessary equipment and daily vehicle control parts for the test, the
lighting devices and auxiliary devices (such as. air conditioner, seat heating and multimedia,
etc.) on the vehicle shall be turned off during the test. If the vehicle is equipped with hidden
lamps, the lamp holder shall be located where the lamps are hidden. If there is a demand for
vehicle driving safety during the test, the vehicle lights can be turned on, but this shall be
indicated in the record.
7.1.4 Before carrying out the various tests specified in 7.2 ~ 7.5, check the SOC of the vehicle.
---The electric quantity of non-plug-in hybrid electric vehicles shall be within the normal
SOC interval specified by the vehicle manufacturer;
---The plug-in hybrid electric vehicles shall be in the SOC in the hybrid mode
recommended by the vehicle manufacturer;
---The tandem hybrid electric vehicles shall be in the SOC recommended by the vehicle
manufacturer and when the on-board auxiliary power supply device can enter the
working state.
7.1.5 The vehicle shall be clean, and if there are no special requirements, the windows and the
vents of the passenger compartment or driving cab shall be closed during the test.
7.1.6 If the vehicle has multiple driving modes (such as. smart mode and sports mode, etc.), the
driving mode recommended by the vehicle manufacturer shall be selected for the test. If the
vehicle manufacturer does not recommend it, then, carry out the test in the default driving mode,
and this shall be indicated in the record.
7.1.7 If the vehicle can manually select the power system working mode, the various tests
specified in 7.2 ~ 7.6 shall be conducted in the hybrid mode. All on-board power systems shall
be able to be in the state of providing energy or driving the vehicle, and shall not automatically
switch to other working modes (pure electric mode or pure thermal mode) during the test.
7.1.8 When carrying out the tests specified in 7.2 ~ 7.6 on vehicles equipped with a transmission,
in accordance with the various test requirements, select a gear. If there are no special
requirements, then, carry out the tests in accordance with the default setting gear or the gear
recommended by the vehicle manufacturer.
7.1.9 Refer to the formats in Appendix B to record the valid data of various tests.
7.2 Maximum Thirty-minutes Speed Test in the Hybrid Mode
7.2.1 The maximum thirty-minutes speed test can be conducted on a circular road or on a chassis
dynamometer. When testing on the chassis dynamometer, the vehicle shall be loaded in
accordance with the test load required in 5.3.1 for the determination of driving resistance. The
method for the determination of driving resistance shall comply with the following provisions.
---The driving resistance of light-duty vehicles can be determined in accordance with the
requirements of the vehicle manufacturer and the taxiing method specified in Appendix
CC of GB 18352.6-2016 or the method of calculating road load and driving resistance
based on vehicle parameters. When adopting the taxiing method, the vehicle shall drive
to a speed that is 10 km/h ~ 15 km/h higher than the estimated maximum thirty-minutes
speed specified by the vehicle manufacturer and maintain it stably for at least 1 minute...