静动液辅助制动系统恒转矩制动策略研究

Research on Constant Torque Braking Strategy of Hydrostatic and Hydraulic Auxiliary Braking System

对履带车辆液力辅助制动系统的恒转矩制动策略进行了研究。结合实验与理论分析的结果,得到了液压制动与液力制动工况下偶合器充液量、液压泵排量的变化对车辆制动力的影响规律,吸取了液压制动与液力制动的优点,针对液力-液压制动工况建立了恒转矩制动策略。通过对偶合器充液量、液压泵排量的自动调节,实现了车辆的恒转矩制动。最后对采用恒转矩制动策略前后的能量回收率与制动距离进行了对比,验证了该策略的效能。

A constant torque braking strategy for tracked vehicle hydrostatic and hydraulic auxiliary braking system is studied. Combining the test and theoretical analysis results, the influence law of coupler filling liquid quantity and hydraulic pump discharge variation to vehicle braking force under the hydrodynamic braking and hydrostatic brak- ing work condition is obtained. Absorbing the advantages of hydrodynamic braking and hydrostatic braking, aiming at the work condition of hydrodynamic - hydrostatic braking, the constant torque braking strategy is built. The vehicle constant torque braking is achieved through the automatic regulation of coupler filling liquid quantity and hydraulic pump discharge. The efficiency is verified through the comparison of energy recovery and braking length before and after using constant torque braking strategy.