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International Journal of Automotive Technology > Volume 21(5); 2020 > Article
International Journal of Automotive Technology 2020;21(5): 1233-1246.
doi: https://doi.org/10.1007/s12239-020-0117-5
Yu Liu, Zhi Xin Wu, Hua Zhou, Han Zheng Nan Yu, Xiao Pan An, Jing Yuan Li, Meng Liang Li
China Automotive Technology and Research Center Co., Ltd.
PDF Links Corresponding Author.  Yu Liu , Email. liuyu2016@catrac.ac.cn
Driving cycles provide a basis for vehicle development and calibration and also serves as the foundation for energy consumption and emissions certification of vehicles. This paper presents the China Light-Duty Vehicle Test Cycle (CLTC) developed by the China Automotive Technology & Research Center (CATARC). First, the important steps and technical routes toward the CLTC development process are summarized. Second, the specific CLTC development process is presented in detail, including the data acquisition and data analysis procedures, weighting factor development and driving cycle construction. Then, the main driving characteristics of the New European Driving Cycle (NEDC), the Worldwide Harmonized Light-Duty Vehicles Test Cycle (WLTC), the Federal Test Procedure (FTP-75), the CLTC and the actual collected data are compared. The CLTC has low average speed, a high idle speed ratio and more frequent acceleration and deceleration characteristics. Finally, 70 vehicles are t ested based on the NEDC, WLTC, and CLTC according to their legislative procedures in the vehicle emission laboratories of the CATARC and the manufacturers. The results show that the CLTC’s fuel consumption is much higher than that of the NEDC and WLTC, and CLTC can effectively reflect the actual fuel consumption of users.
Key Words: China light-duty vehicle test cycle, Fuel consumption, Type approval
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