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GB/T 19754-2021: Test methods for energy consumption of heavy-duty hybrid electric vehicles Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 19754: Historical versions
Similar standardsGB/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/GBT19754-2021GB 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 ContentsForeword... 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... 411 ScopeThis 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 ReferencesThe 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 DefinitionsThe 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 Cycle5.1 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 Preparation6.1 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 Procedure7.1 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 Results8.1 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 emission9 Test ReportThe 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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