The invention discloses a multi-axle commercial vehicle brake-by-wire system heat fading compensation method based on deceleration correction, and relates to the field of brake-by-wire systems. Comprising the steps of braking process judgment, heating rate calculation, cooling rate calculation, brake disc temperature updating, oil outlet pressure judgment, brake disc low-temperature judgment, normal braking efficiency calculation, first-order filtering, brake disc high-temperature judgment, hot disc braking efficiency calculation, first-order filtering, braking efficiency decline proportion calculation and brake pressure target correction value calculation. According to the method, the estimated brake disc temperature is only used for judging whether the brake is in the low-temperature or high-temperature state currently, the requirement for accuracy of use parameters is not high when the brake disc temperature is estimated, and influences of the vehicle speed and the wind speed do not need to be considered in the cooling rate. Meanwhile, the relation between the temperature of the brake disc and the friction coefficient between the brake disc and the friction plate does not need to be known in the implementation process, and therefore function calibration is simpler. And the braking force characteristics under different vehicle loads are not changed.
本发明公开了一种基于减速度修正的多轴商用车线控制动系统热衰退补偿方法,涉及线控制动系统领域,包括制动过程判断、计算升温速率、计算降温速率、更新制动盘温度、出油口压力判断、制动盘低温判断、计算正常制动效能、一阶滤波、制动盘高温判断、计算热盘制动效能、一阶滤波、计算制动效能衰退比例、计算制动压力目标修正值。本发明中,估算的制动盘温度仅用于判断当前制动器处于低温或高温状态,对制动盘温度估算时使用参数精确度要求不高,降温速率中不需要考虑车速、风速的影响。同时实现过程中不需要知道制动盘温度和制动盘‑摩擦片间摩擦系数的关系,因此功能标定更为简单。不会改变车辆载荷不同情况下的制动力特性。
Multi-axle commercial vehicle brake-by-wire system heat fading compensation method based on deceleration correction
一种基于减速度修正的多轴商用车线控制动系统热衰退补偿方法
2023-03-14
Patent
Electronic Resource
Chinese
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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