Modeling and Simulation of Hybrid Drive System on the Toyota PRIUS Based on Bond Graph GAO Hai-ou,WANG Zhong-fan,DENG Ya-dong (School of Automotive Engineering, WUT,Wuhan 430070, China)Based on the application of bond graph in the hybrid drive system on the Toyota PRIUS is discussed in detail .To solve the mathematic model of the hybrid drive system, the Matlab/Simulink is used. The simulation result showed that using the bond graph could reflect the dynamic characteristic in effect. And the advantage of simulation on bond graph is testified by solving the fluctuation of the result effectually.PRIUS; hybrid;drive system; bond graph; modeling and simulation; fluctuation