Hybrid cars are considered an effective solution in the transition from traditional cars to electric cars. In particular, the coordination between the internal combustion engine's power source and the electric motor plays an important role and determines the technical features and emissions of the vehicle. Up to now, many methods of motivational coordination have been studied and then applied in practical transportation. Typical and dominant one is the mixed method. However, this approach has a complex structure and exhibits low efficiency also. In order to improve the efficiency of hybrid car power source coordination, a hybrid car power source coordination system model that combines a continuously variable transmission (CVT) with a one-way clutch will be presented in this work. To do that, we researched and developed the model by using AVL-Cruise software. Research results show that fuel consumption is reduced by 74.9% compared to traditional vehicles when running on the UDC test cycle.