The invention discloses a multi-axle commercial vehicle brake-by-wire system pressure target decision-making method which comprises the following steps: S1, judging whether a driver steps on a brake pedal or not according to signals of a pedal travel sensor and a pedal master cylinder pressure sensor, and if the driver does not step on the brake pedal, executing the following step S3; and S3, whether an emergency braking request sent by the whole vehicle through the CAN bus exists or not is judged, and if the emergency braking deceleration request of the whole vehicle exists, the target pressure PEBR corresponding to the external braking request is obtained. According to the invention, after external request braking, backlash compensation, heat fading compensation and energy recovery pressure targets of the brake-by-wire system are added, pressure targets of electric power assistance and redundant backup are combined; the brake-by-wire brake system has the functions of electric power assistance, ABS pressure coordination, external request braking, redundant backup, caliper clearance compensation, brake recession compensation and brake energy feedback of the multi-axle commercial vehicle, and finally, the calculation output of the final target pressure of the brake-by-wire system is achieved through a pressure target decision-making method.
本发明公开了一种多轴商用车线控制动系统压力目标决策方法,包括以下步骤:S1、根据踏板行程传感器、踏板主缸压力传感器信号判断驾驶员是否已经踩下制动踏板,若未踩下制动踏板,则执行下述步骤S3;S3、判断有无整车通过CAN总线发出的紧急制动请求,若有整车紧急制动减速度请求,则获得外部制动请求对应的目标压力PEBR。本发明中,增加线控制动系统的外部请求制动、间隙补偿、热衰退补偿、能量回收压力目标后,并结合电动助力、冗余备份的压力目标,即包括了多轴商用车的电动助力、ABS压力协调、外部请求制动、冗余备份、卡钳间隙补偿、制动衰退补偿、制动能量回馈功能,并最终通过压力目标决策方法,实现线控制动系统最终目标压力的计算输出。
Pressure target decision-making method for brake-by-wire system of multi-axle commercial vehicle
一种多轴商用车线控制动系统压力目标决策方法
2022-04-05
Patent
Electronic Resource
Chinese
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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