Economy Performance Simulation and Test Validation of a Sample Vehicle with Two-Speed Dedicated Electric Transmission 2020-01-5126
Multi-speed transmissions can improve power and economy performance of battery electric vehicles (BEVs), thus becoming an inevitable trend in automotive industry. A two-speed dedicated electric transmission (2DET), which can realize switching of two gear ratios through two wet clutches, is explained firstly. Secondly, 2DET is developed and a prototype is assembled in a BEV of Beijing Electric Vehicle Co. Ltd. (BJEV). Thirdly, the differences of new European driving cycle (NEDC) and China light duty vehicle test cycle passenger (CLTC-P) are compared. Fourthly, the parameters of battery cell are tested and a simulation model of the whole vehicle with 2DET is built. Finally, vehicle economy performance under NEDC and CLTC-P is simulated, and the results are validated in bench tests. Comparison shows that the economy simulation results match the test results, and the vehicle economy under CLTC-P is better than NEDC, with an increase of 1.16%.
Citation: Zhao, Q., Xin, Y., Ma, Y., and Yang, L., "Economy Performance Simulation and Test Validation of a Sample Vehicle with Two-Speed Dedicated Electric Transmission," SAE Technical Paper 2020-01-5126, 2020, https://doi.org/10.4271/2020-01-5126. Download Citation
Qian Zhao, Yu Xin, Yongzhi Ma, Lianghui Yang
Beijing New Energy Vehicle Technology Innovation Center Co.,
SAE 2020 Vehicle Electrification and Autonomous Vehicle Technology Forum
Wet disc clutches
Simulation and modeling
Subscribers can view annotate, and download all of SAE's content.
Learn More »