Abstract: Nowadays, the use of hybrid cars is increasingly popular in Vietnam as well as around the world. Researching to master hybrid vehicle technology is a highly practical matter. Especially, the study of the driving force of hybrid vehicles is the most important topic. The power sources of hybrid vehicles include internal combustion engine and electric motor. The content of the article presents the determination of the method of combining the driving force of the hybrid vehicle, calculating the parameters of the internal combustion engine and electric motor. Then, the parameters of hybrid vehicles and vehicles using conventional internal combustion engines were set and simulated on AVL-Cruise software. The simulation results show that the total emissions (including NOx, CO, HC) of hybrid vehicles were significantly reduced compared to cars using conventional internal combustion engines. Specifically, after running the simulation by FTP75 cycle on AVL-Cruise software, NOx emissions decreased by 69%, CO emissions decreased by 58% and HC emissions decreased by 44%. 

Keywords: Hybrid electric vehicles, Electric motor, Internal combustion engine, Power divider, AVL-Cruise software