Study and Analysis of a Multi-Mode Power Split Hybrid Transmission

World Electric Vehicle Journal

Xiaojiang Chen¹  Xiaofeng Chen²  Lipeng Zheng²  Jiajia Jiang²  Haifeng Tang² 

[1] Great Wall Motor Austria Research & Development GmbH, 2542 Kottingbrunn, Austria;HYCET E-Drive System Co., Ltd., Baoding 071000, China;

关键词: power split;    dedicated hybrid transmission (DHT);    planetary gear;    electronically controlled continuous variable transmission (eCVT);    fuel consumption;   

DOI  :  10.3390/wevj11020046

来源: DOAJ

【 摘 要 】

A two-motor power-split dedicated hybrid transmission (DHT) with two planetary gears is proposed for the applications of a hybrid electric vehicle (HEV) and plug-in HEV (PHEV). The proposed DHT can provide electronically controlled continuous variable transmission (eCVT) with two different gear ratios. One of two electric motors is employed to act as a speeder for splitting the input power of internal combustion engine (ICE) and the other acts as a torquer to assist ICE for boosting. Assisted by an electric motor, ICE can always be enhanced to operate at its efficient area for the benefits of fuel economy improvement. The maximum ICE torque is viable to be mechanically transmitted to vehicle wheels from standstill with two different gear ratios. This feature can help reduce the traction motor torque and power sizing significantly. The paper presents detailed theoretical analyses of the proposed eCVT. Comprehensive simulation demonstrations for a pickup truck HEV application are given to address that the vehicle fuel consumption can be considerably reduced without compromising acceleration performance.

【 授权许可】

Unknown