scholarly journals Influence of Test Cycles on Energy Consumption Test of Electric Vehicles

2021 ◽  
Vol 241 ◽  
pp. 02004
Author(s):  
Yu Liu ◽  
Kunqi Ma ◽  
Hanzhengnan Yu ◽  
Jingyuan Li ◽  
Xiaopan An
Keyword(s):  
Energy Consumption ◽  
Electric Vehicles ◽  
Energy Demand ◽  
Test Results ◽  
Test Cycle ◽  
Light Duty ◽  
Actual Use ◽  
Light Duty Vehicle ◽  
Simulation Results ◽  
Vehicle Test

In order to verify the necessity of the application of China Automotive Test Cycle which is constructed through actual driving data in china of more than 55 million kilometers in the energy consumption test of electric vehicles in China, this paper compares the characteristics of New European Test Cycle (NEDC), World-wide harmonized Light duty Test Cycle (WLTC) and China light-duty vehicle test cycle for passenger car(CLTC-P), and analyzes the differences of vehicle energy demand under different test cycles from theoretical and simulation point, simulation results show that the endurance mileage is longest and the energy recovery strategy is more effective under CLTC-P cycle. Finally, four types of vehicles are selected to carry out the endurance mileage test under these three test cycles. The test results are consistent with the simulation results. Therefore, in order to make the test results of electric vehicle energy consumption closer to the actual use of our country, CLTC-P should be selected to replace NEDC and WLTC cycle.

scholarly journals Analysis of fuel consumption of China light duty vehicle test cycle for passenger car(CLTC-P)

2021 ◽  
Vol 268 ◽  
pp. 01029
Author(s):  
Meng Zhou ◽  
Chongzhi Zhong ◽  
Jingyuan Li
Keyword(s):  
Fuel Consumption ◽  
Air Conditioning ◽  
Test Results ◽  
Test Cycle ◽  
Test Procedures ◽  
Light Duty ◽  
Certification Test ◽  
Light Duty Vehicle ◽  
Vehicle Test ◽  
P Cycle

Through the fuel consumption test of several listed vehicles in China, the basic fuel consumption results of cold start under CLTC-P cycle, the fuel consumption results of vehicles under the condition of air conditioning on, and the fuel consumption results of vehicles under the condition of air conditioning off are measured. At the same time, the differences between NEDC cycle and CLTC-P cycle in China's fuel consumption certification test are compared, and the results of fuel consumption test are combined The fuel consumption test results under CLTC-P cycle are higher than those under NEDC cycle, and the fuel consumption test procedures under Chinese condition are more in line with the actual driving situation in China.

scholarly journals Intercomparison of real-time tailpipe ammonia measurements from vehicles tested over the new world-harmonized light-duty vehicle test cycle (WLTC)

2015 ◽  
Vol 22 (10) ◽  
pp. 7450-7460 ◽  
Author(s):  
Ricardo Suarez-Bertoa ◽  
Alessandro A. Zardini ◽  
Velizara Lilova ◽  
Daniel Meyer ◽  
Shigeru Nakatani ◽  
...  
Keyword(s):  
Real Time ◽  
New World ◽  
Test Cycle ◽  
Light Duty ◽  
Light Duty Vehicle ◽  
Vehicle Test

Development of China Light-Duty Vehicle Test Cycle

2020 ◽  
Vol 21 (5) ◽  
pp. 1233-1246
Author(s):  
Yu Liu ◽  
Zhi Xin Wu ◽  
Hua Zhou ◽  
Han Zheng ◽  
Nan Yu ◽  
...  
Keyword(s):  
Test Cycle ◽  
Light Duty ◽  
Light Duty Vehicle ◽  
Vehicle Test

scholarly journals Comparative Analysis of China Light-duty Vehicle Test cycle for Passenger Car and Other Typical Driving Cycles

2021 ◽  
Vol 241 ◽  
pp. 02002
Author(s):  
Yu Liu ◽  
Yongkai Liang ◽  
Hanzhengnan Yu ◽  
Xiaopan An ◽  
Jingyuan Li
Keyword(s):  
Automobile Industry ◽  
Driving Cycle ◽  
Third Party ◽  
National Standard ◽  
Test Cycle ◽  
Passenger Cars ◽  
Passenger Car ◽  
Light Duty ◽  
Light Duty Vehicle ◽  
Vehicle Test

In 2019, China issued the first national standard for vehicle driving cycle, in which China light-duty vehicle test cycle for passenger car (CLTC-P) is the driving cycle for light-duty passenger cars. CLTC-P is of great significance to the development of China’s automobile industry, and has a great impact on the development and calibration of vehicles of automobile enterprises. In this paper, firstly, the driving characteristics of CLTC-P are analyzed systematically. Then it is compared with the third-party navigation big data to prove the rationality and effectiveness. Finally, CLTC-P is compared with other legal cycles in terms of time, distance, speed, and acceleration characteristics. The result shows that by comparing the characteristics of CLTC-P with other typical cycles and the GIS weighted results, the CLTC-P is more in line with Chinese reality and is significantly different from other typical cycles.

scholarly journals Dimensioning of a permanent magnet synchronous machine for electric vehicles according to performance and integration requirements

2022 ◽  
Author(s):  
Moritz Künzler ◽  
Robin Pflüger ◽  
Robert Lehmann ◽  
Quentin Werner
Keyword(s):  
Energy Consumption ◽  
Permanent Magnet ◽  
Electric Vehicles ◽  
Synchronous Machine ◽  
Electromagnetic Properties ◽  
Permanent Magnet Synchronous Machine ◽  
Test Cycle ◽  
Element Analysis ◽  
First Results ◽  
Vehicle Test

AbstractFinding the optimum design of electrical machines for a certain purpose is a time-consuming task. First results can be achieved, however, with scaling known machine designs in length and turns per coil by means of analytical equations, while scaling in diameter requires finite element analysis (FEA), since electromagnetic properties change significantly. In this paper, the influence of diameter, length and turns per coil on the torque, power and efficiency of a permanent magnet synchronous machine (PMSM) are investigated in a sensitivity analysis. Furthermore, their impact on energy consumption in different drive cycles and different vehicle types is outlined. A highway car and a city car are compared in a highway cycle, a city cycle and the Worldwide Harmonized Light Vehicle test Cycle. The results describe significant differences in energy consumption for different machine designs in one application but also between different applications. This highlights the necessity to decide whether or not the powertrain should be optimized for a single purpose or for universal use.

scholarly journals Improvement of Battery Life and Energy Economy for Electric Vehicles with Two-Speed Transmission

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3409
Author(s):  
Ying Lyu ◽  
Xuenan Sun ◽  
Hong Chu ◽  
Bingzhao Gao
Keyword(s):  
Energy Consumption ◽  
Electric Vehicles ◽  
Economic Indicator ◽  
Battery Life ◽  
Driving Cycles ◽  
Life Model ◽  
Energy Environment ◽  
Energy Economy ◽  
Simulation Results ◽  
The One

With the current energy environment background and development of the electrification of the automotive industry, a comprehensive economic indicator, in which the battery aging is further considered on the basis of conventional energy consumption, is proposed to research the energy optimization problem of two-speed electric vehicles. Firstly, a battery life model that adapts to vehicles under high dynamic conditions is introduced. Then, the speed optimal control problem of the two-speed electric vehicles in the acceleration–cruise–deceleration process is established and solved. Finally, the simulation results of two different performance indicators are contrasted and the performance improvement of the two-speed gearbox to the electric vehicles is analyzed. The simulation results under various working scenarios and driving cycles demonstrate that, compared with the conventional economic indicator considering the energy consumption only, the proposed economic indicator can significantly improve the battery life. In addition, it can also be seen that, compared with the one-speed electric vehicles, the application of a two-speed gearbox provides better performance from the aspects of battery aging saving and energy consumption.

Development of the Worldwide Harmonized Test Procedure for Light-Duty Vehicles

2015 ◽  
Vol 2503 (1) ◽  
pp. 110-118 ◽  
Author(s):  
Biagio Ciuffo ◽  
Alessandro Maratta ◽  
Monica Tutuianu ◽  
Konstantinos Anagnostopoulos ◽  
Georgios Fontaras ◽  
...  
Keyword(s):  
Carbon Dioxide Emissions ◽  
Test Procedure ◽  
Test Results ◽  
Test Cycle ◽  
Test Procedures ◽  
United Nations Economic Commission ◽  
Vehicle Performance ◽  
Light Duty ◽  
Economic Commission ◽  
Light Duty Vehicles

To assess vehicle performance on criteria compounds, carbon dioxide emissions, and fuel energy consumption, laboratory tests are generally carried out. During these tests, a vehicle is driven on a chassis dynamometer (which simulates the resistances the vehicle encounters during its motion) to follow a predefined test cycle. In addition, all conditions for running a test must strictly adhere to a predefined test procedure. The procedure is necessary to ensure that all tests are carried out in a comparable way, following the requirements set by the relevant legislation. Test results are used to assess vehicle compliance with emissions limits or to evaluate the fuel consumption that will be communicated to customers. Every region in the world follows its own approach in carrying out these types of tests. The variations in approaches have resulted in a series of drawbacks for vehicle manufacturers and regulating authorities, leading to a plethora of different conditions and results. As a step toward the harmonization of the test procedures, the United Nations Economic Commission for Europe launched a project in 2009 for the development of a worldwide harmonized light-duty test procedure (WLTP), including a new test cycle. The objective of the study reported here was to provide a brief description of WLTP and outline the plausible pathway for its introduction in European legislation.

scholarly journals Research on exhaust emission characteristics and technical route under CLTC cycle

2021 ◽  
Vol 268 ◽  
pp. 01054
Author(s):  
Peilin Geng ◽  
Yimin Wang ◽  
Wei Zhao ◽  
Xionghui Zou
Keyword(s):  
Fuel Injection ◽  
Direct Injection ◽  
Pollutant Emissions ◽  
Exhaust Emission ◽  
Emission Characteristics ◽  
Emission Standard ◽  
Light Duty ◽  
Light Duty Vehicle ◽  
Vehicle Test ◽  
Injection Technology

In this paper, the light duty that meets the China 6 emission standard is selected to study the emission characteristics of different emission control technology routes under China light-duty vehicle test cycle (CLTC). The results show that the cold start stage of CLTC cycle is still the stage with the most pollutant emissions. The THC, CO and NOx emissions of vehicles on the supercharged direct injection technology are higher than those on the naturally aspirated port fuel injection technology. In terms of reducing the exhaust emission, PHEV technology route is the best, followed by naturally aspirated PFI technology route, and then turbocharged direct injection with GPF route.

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