【摘要】 建立了油气悬架系统两自由度1/4车辆模型的数学模型,基于数学模型,应用Matlab6.5/Simulink5.0建立了仿真模型。利用该仿真模型研究了油气弹簧主活塞直径、阻尼孔水力直径、单向阀水力直径以及平衡位置时副气室和蓄能器内气体体积与压力等主要参数的变化对平顺性、悬架动行程和轮胎接地性等悬架系统性能的影响,为油气弹簧主要参数的确定提供了理论依据。研究结果表明,油气弹簧主要参数的确定需要统筹考虑悬架系统的综合性能,在突出主要性能的同时要兼顾到其他性能。更多还原

【Abstract】 Mathematic model and simulation model of a 2-DOF quarter-car model with hydro-pneumatic suspension system were established. Then, the simulation model was employed to study the effect of main parameters of hydro-pneumatic spring on suspension system performances, which could help to design the main parameters properly. The main parameter includes volume and pressure of the auxiliary gas room and the accumulator at equilibrium position, diameter of the main piston, hydraulic diameter of the damping hole and check valve. The suspension system performance consists of ride comfort, suspension stroke and road holding. The results show that the combined performance of suspension system should be given overall consideration when the main parameters of hydro-pneumatic spring are chosen, that is to say, while the primary suspension performance is emphasized, other performances should also be taken into account.更多还原