Analysis of Handling Stability of Hydraulic Hybrid Vehicle based on ADAMS/Car Simulation<bold> </bold>

Hydraulic hybrid vehicle is developed from the traditional vehicle by installation of the hydraulic system and disassembly of the mechanical transmission system, which influences the handling stability by changes of the centroid. Three layout schemes of the hydraulic system in hydraulic hybrid vehicle were proposed in this study, which were based on available space of the vehicle and size of the major hydraulic component. According to virtual prototype model of the vehicle constructed in ADAMS/Car software, simulations of the three layout schemes on steering angle step input test, steering angle pulse test and snake formation test were conducted. Scores of the steering angle step input test, steering angle pulse test and snake formation test of the T-type layout were 82, 80.72 and 93.42. Meanwhile, these of the postposition layout were 76, 79.46, and 91.11, and these of the parallel layout were 86, 82.19 and 95.55. Therefore, the final scores of these three layout schemes were 256.14, 246.57, and 263.74, respectively. Simulation results indicated that the parallel layout exhibited the best handling stability, which would be propitious to improve comprehensive performance of the hydraulic hybrid vehicle.<bold> </bold>