GB/T 19754-2021 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 19754-2021 | English | 380 |
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Test methods for energy consumption of heavy-duty hybrid electric vehicles
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| GB/T 19754-2015 | English | 1105 |
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Test methods for energy consumption of heavy-duty hybrid electric vehicles
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| GB/T 19754-2005 | English | 2799 |
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[Replaced by GB/T 19754-2021] Test methods for energy consumption of heavy-duty hybrid electric vehicles
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 19754-2021
GB/T 19754-2021: Test methods for energy consumption of heavy-duty hybrid electric vehicles---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/GBT19754-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
CCS T 47
Replacing 19754-2015
Test Methods for Energy Consumption of Heavy-duty
Hybrid Electric Vehicles
Issued on. OCTOBER 11, 2021
Implemented on. MAY 1, 2022
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 4
1 Scope... 7
2 Normative References... 7
3 Terms and Definitions... 8
4 Calculation Method for Net Energy Change (NEC)... 8
5 Test Cycle... 10
6 Test Preparation... 10
7 Test Procedure... 15
8 Data Records and Results... 22
9 Test Report... 30
Appendix A (Informative) Example of Determination Procedure of Relative
Change of NEC and SOC Correction Procedure... 31
Appendix B (Normative) Table of Parameters of Sample Vehicle... 33
Appendix C (Normative) OVC-HEV Pure Electricity Utilization Factor (UF)... 37
Appendix D (Informative) Converted Fuel Consumption... 39
Bibliography... 41
1 Scope
This document specifies the test methods for the energy consumption test of heavy-
duty hybrid electric vehicles on a chassis dynamometer.
This document is applicable to hybrid electric vehicles with a maximum total mass of
more than 3,500 kg, including trucks, semi-trailer tractors, passenger vehicles, dump
trucks and city buses. Concrete mixer trucks may refer to the relevant measurement
methods of dump trucks; other special-purpose transport vehicles may refer to the
relevant measurement methods of trucks.
This document is applicable to vehicles that run on gasoline or diesel. Other fuel types
of vehicles may take this document as a reference.
This document does not apply to special-purpose operating vehicles, including van-
type special-purpose operating vehicles, tank-type special-purpose operating vehicles,
special-purpose dump trucks, silo-type special-purpose operating vehicles, special-
purpose vehicles for hoisting and lifting, as well as special-purpose operating vehicles
with special structures, etc.
2 Normative References
The contents of the following documents constitute indispensable clauses of this
document through the normative references. 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 1884 Crude Petroleum and Liquid Petroleum Products - Laboratory
Determination of Density - Hydrometer Method
GB/T 3730.1 Motor Vehicles and Trailers - Types - Terms and Definitions
GB/T 12534 Motor Vehicles - General Rules of Road Test Method
GB/T 15089 Classification of Power-driven Vehicles and Trailers
GB 17691-2018 Limits and Measurement Methods for Emissions from Diesel Fueled
Heavy-duty Vehicles (China VI)
GB 18352.6-2016 Limits and Measurement Methods for Emissions from Light-duty
Vehicles (China VI)
3 Terms and Definitions
The terms and definitions defined in GB/T 3730.1, GB/T 15089, GB/T 19596 and GB/T
38146.2-2019 are applicable to this document.
4 Calculation Method for Net Energy Change (NEC)
4.1 General Requirements
During vehicle movement and test, the energy change of the rechargeable energy
storage system (REESS) shall be monitored.
4.2 Determination of NEC
4.2.1 NEC of power storage battery
NEC of power storage battery shall be calculated in accordance with Formula (1) ~
Formula (3).
4.2.2 NEC of super capacitor
NEC of super capacitor shall be calculated in accordance with Formula (4).
5 Test Cycle
5.1 In accordance with China heavy-duty commercial vehicle test cycle (CHTC)
specified in Appendix A of GB/T 38146.2-2019, measure the fuel consumption of the
vehicle.
5.2 If the maximum speed of the vehicle is less than the maximum vehicle speed of
CHTC, when the target speed is greater than the maximum vehicle speed, in
accordance with the stipulations of Appendix CA.5 in GB 18352.6-2016, correct the
test cycle.
6 Test Preparation
6.1 Test conditions
6.2 Pre-collection of Vehicle Data
6.2.1 Before the test, in accordance with the content of Appendix B, vehicle parameters
shall be recorded in detail.
6.2.2 Any content that is different from the basic procedure, for example, the test
vehicle is running in a different working mode than the hybrid electric vehicles, shall be
completely recorded for the subsequent tests to reproduce the test process.
6.3 Vehicle Conditions
6.3.1 Run-in
Before the test, in accordance with the automobile manufacturer’s stipulations, the
vehicle shall be subject to run-in, or the run-in shall not exceed 10,000 km.
6.3.3 Load of test vehicle
6.3.3.1 For city buses, the test shall be carried out under the condition of 65% of the
maximum design loading mass. The setting of the road load shall take the taxiing test
specified in GB/T 27840 as a reference.
6.3.4 Tire pressure
Before the test starts, the tire pressure shall be set to the pressure value when the
vehicle establishes the road resistance coefficient on the chassis dynamometer, and
must not exceed the range specified by the automobile manufacturer.
6.3.5 Gear shift
6.3.5.1 The driver shall use the appropriate operation of the accelerator pedal or / and
the accurate selection of the gear shift speed to achieve the speed-to-time
correspondence specified in the test cycle.
6.3.6 Tolerances
6.3.6.1 If the maximum speed of the vehicle is not less than the maximum vehicle
speed of CHTC, in accordance with the test cycle specified in 5.1, the test shall be
performed.
6.3.7 Other vehicle settings
If the vehicle has the function of braking energy regeneration, the same control strategy
as the actual vehicle shall be used during the test.
6.3.8 Test fuel
6.3.8.1 The test fuel shall comply with the stipulations of the automobile manufacturer,
and adopt the benchmark fuel that complies with the requirements of Appendix K in
GB 18352.6-2016, or the commercially available vehicle fuel that complies with the
stipulations of the relevant national standards.
6.3.8.2 In accordance with GB/T 1884, determine the fuel density.
The test equipment and accuracy requirements are as follows.
7 Test Procedure
7.1 Start-up and Pre-operation of Vehicle Drive System
7.1.1 This document recommends that the vehicle be tested for energy consumption
with the air conditioner turned off. For other vehicle-mounted accessories that are not
necessary during the normal operation of the vehicles, during the test, they shall be
disconnected or shielded.
7.1.2 The drive system of the vehicle shall be activated in accordance with the starting
procedure recommended in the user manual provided by the automobile manufacturer.
7.2 Test Process
The test process is shown in Figure 2.
7.3 Test Procedure of Non-External Rechargeable Hybrid Electric Vehicle
(NOVC-HEV)
7.3.1 REESS pre-setting
For NOVC-HEV, the vehicle REESS shall be in the state of charge (SOC) for normal
use as specified by the automobile manufacturer, otherwise, in accordance with the
automobile manufacturer’s requirements, and through the mode of external charging
or the use of vehicle-mounted engine, REESS shall be preset and adjusted to the SOC
for normal use.
7.4.2 OVC-HEV test procedure including pure electric working mode
7.4.2.1 General requirements
7.4.2.1.1 OVC-HEV, which includes pure electric working mode, refers to a vehicle that
can complete a test cycle in a pure electric working mode on the premise of satisfying
6.3.6.
7.4.2.1.4 Unless it is otherwise specified, vehicle immersion is allowed in each test
cycle; the immersion time shall not exceed 30 min. During the vehicle immersion, the
ignition lock shall be turned off; the hood shall be closed; the test bench fan shall be
turned off; the brake pedal shall be released; the external power supply shall not be
used for charging.
7.4.2.2 Movement of vehicle
7.4.2.3 Pure electric driving range stage (Stage I)
7.4.2.3.1 The test shall be carried out in accordance with the test cycle specified in
Chapter 5.
7.4.2.5 Electric energy balance operation stage (Stage III)
Adopt the test cycle specified in Chapter 5 to continuously carry out the test. In addition,
in accordance with 4.3, calculate the relative change of NEC of each test cycle. After
the (n2 + 1)th test cycle, when the absolute value of the relative change of NEC is not
greater than 5% for two times, the condition for the end of Stage III test is reached.
7.4.2.6 Charge and electricity measurement
7.4.3 OVC-HEV test procedure excluding pure electric working mode
7.4.3.1 General requirements
7.4.3.2 Movement of vehicle
7.4.3.2.1 In the case where the parking location where the vehicle completes the
charging is not in the same place as the test site, the vehicle is required to move to the
test site at a constant speed of not more than 30 km/h; the maximum distance from the
vehicle preset location to the test site must not exceed 3 km. Then, cut off the power
supply and turn off the ignition lock to perform vehicle immersion. The immersion time
shall not exceed 15 min.
7.4.3.3 REESS energy adjustment stage
In accordance with the stipulations of 7.4.2.4, perform the test.
7.4.3.4 Electric energy balance operation stage
In accordance with the stipulations of 7.4.2.5, perform the test.
7.4.3.5 Charge and electricity measurement
In accordance with the stipulations of 7.4.2.6, measure the power EAC charged from
the external power supply and the charging time.
8 Data Records and Results
8.1 Environmental Data
Record the ambient temperature and atmospheric pressure at the beginning and the
end of the test.
8.2 Fuel Density
Before the test starts, the fuel density shall be recorded.
8.6 NEC Calculation
In accordance with the relevant stipulations of 4.2, calculate the NEC of each test cycle
and the total NEC of the vehicle.
8.7 Test Results
8.7.3 OVC-HEV test result
8.7.3.1 OVC-HEV including pure electric working mode
8.7.3.1.4, multiply the conversion factor a to calculate CO2 emission
Comprehensive The result of fuel consumption determined in accordance with 8.7.3.1.5.1 or 8.7.3.2.3.1, multiply the conversion factor a to
calculate CO2 emission
9 Test Report
The test report shall include vehicle configuration, test cycle and all measurement
parameters and results specified in Chapter 8.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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