GB/T 19752-2024 PDF English
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| GB/T 19752-2024 | English | 380 |
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Hybrid electric vehicles - Power performance - Test method
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| GB/T 19752-2005 | English | 75 |
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GB/T 19752-2024: Hybrid electric vehicles - Power performance - Test method---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT19752-2024
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
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 & 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.
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.
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
The air density of the test environment is calculated in accordance with Formula (1). Compared
with the air density of the standard environment, its change shall not exceed 7.5%.
4.2.2 Wind speed
For Category-M1 vehicles and Category-N1 vehicles with a maximum design total mass less
than 2 t, the measurement shall be carried out at 0.7 m above the road surface. For other vehicles,
the measurement shall be carried out at 1.6 m above the road surface. The average wind speed
shall not exceed 3 m/s, and the maximum wind speed shall not exceed 5 m/s.
4.2.3 Relative humidity
The relative humidity shall be less than 95%.
4.3 Measurement Parameters, Units and Accuracy
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
4.4.2.2 Circular roads
4.4.3 Road conditions for acceleration ability test
The measurement zone shall be a flat, dry, clean concrete or asphalt (or similar) straight road.
The longitudinal slope of the measurement zone shall not exceed 0.1%, and the transverse slope
shall not exceed 3%.
4.4.4 Requirements for test rampway
5 Preparation of Test Vehicle
5.1 Charging of REESS
5.1.1 Overall requirements
If the hybrid electric vehicles can be externally charged, the REESS shall be charged in
accordance with the provisions of 5.1.2 and 5.1.3.If the hybrid electric vehicles cannot be
externally charged, in accordance with the illustrative materials provided by the vehicle
Test Section
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.
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
5.3.1.2 Category-M2 vehicles, Category-M3 vehicles, and Category-N vehicles with a
maximum design total mass not less than 2 t
Except for special provisions, the test mass applicable to Category-M2 and Category-M3 urban
buses shall be the curb weight of the complete vehicle plus 65% of the maximum design loading
mass. The test mass of semi-trailer tractors and tractor trucks shall be the maximum design total
mass in the combination vehicle state specified by the vehicle manufacturer.
5.3.2 Test mass and load distribution requirements for various test items
When carrying out the maximum thirty-minutes speed test, maximum speed test and
acceleration ability test, the vehicle shall respectively be loaded in accordance with the
provisions of 5.3.1 and this clause.
6 Determination of Test Items
6.1 The test items of power performance are shown in Table 2.
6.2 If the test vehicle has a manual selection function for the power system working mode,
which enables it to be manually switched to the pure electric mode, and when performing the
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.
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.
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.
7.1.8 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
7.2.3 If the vehicle decelerates uncontrollably by the driver during the test, and the vehicle
speed does not reach 95% of the estimated maximum thirty-minutes speed, the test can be re-
performed in accordance with the above-mentioned estimated maximum thirty-minutes speed.
If the vehicle still cannot maintain the speed for 30 minutes, then, the vehicle manufacturer
shall re-estimate the maximum thirty-minutes speed, until the vehicle can run at a constant
speed for 30 minutes in accordance with the maximum thirty-minutes speed re-estimated by the
vehicle manufacturer.
7.2.4 Measure the mileage S1 traveled by the vehicle, and use Formula (2) to calculate the
average maximum thirty-minutes speed v30.
7.3 Maximum Speed Test in the Hybrid Mode
7.3.1 Standard test procedures (bi-directional test)
7.3.1.1 Set the measurement length, which shall be at least 200 m.
7.3.2 Test procedures for single direction
7.3.2.1 Due to the characteristics of the test road, the vehicle cannot reach its maximum speed
from two directions, so the test can be conducted from only one direction. Its road
characteristics shall satisfy the requirements of 4.4.1 and 4.4.2.
7.3.3 Test procedures of maximum speed on circular roads
7.4 Acceleration Ability Test in the Hybrid Mode
7.4.1 General requirements
7.5 Maximum Gradability Test in the Hybrid Mode
7.5.1 If the vehicle manufacturer has a specially specified hill-climbing gear, the vehicle gear-
shifting device shall be placed in the gear specified by the vehicle manufacturer. If there is no
specially specified gear, the manual gear shall be placed in the lowest forward gear, the
automatic gear shall be placed in gear D, and all-wheel-drive vehicles shall use all-wheel drive.
7.5.2 The test shall be carried out on a rampway with a slope specified by the vehicle
manufacturer. If the specified slope is greater than 40%, a safety device shall be installed.
7.5.3 Park the vehicle on a straight-line segment close to the rampway area.
7.6 Hill Starting Ability Test in the Hybrid Mode
7.6.1 The hill starting ability test shall be performed on a rampway with a slope specified by
the vehicle manufacturer.
7.6.2 In the middle of the selected rampway, set up a measurement zone of at least 10 m. A
starting zone shall be provided in front of the measurement zone. The slopes of the starting zone
and the measurement zone shall be the same.
7.6.3 The test vehicle climbs to the starting zone and stably stops on the rampway by the
vehicle’s own braking system. Place the gear in P or N and turn off all power systems on the
vehicle for 2 minutes.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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