Foot Brake Control (Service)
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| 图 1 | g01261878 |
行车制动踏板的位置 | |
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| 图 2 | g01261880 |
(1) 制动踏板位置传感器 (2) 油箱端口 (3) 供气口 (4) 制动器端口 | |
行车制动器的脚制动阀位于驾驶室内。
制动器位置传感器向制动器 ECM 输入。 该传感器通知制动器 ECM 制动器踏板的位置。 制动器 ECM 使用此输入接通制动灯。 如果卡车配备湿式制动器，制动器位置传感器将使制动器 ECM 向前制动器电磁阀发布电流指令。 如果卡车配备有标准干式前制动器，且前制动器通过前制动器闭锁开关锁止，制动器踏板接合会导致前轮不制动。 如果干式前制动器未通过前制动器闭锁开关锁止，则踏下行车制动踏板将对前制动器发布指令。 制动器踏板位置传感器为 PWM 传感器。 该传感器不需要手动标定或调整。 卡车起动时，制动器位置传感器自动标定。
制动器充油泵中的机油经由驾驶室制动器阀流入脚制动器阀的供油口 (3) 。
踩下行车制动器控制装置时，脚制动器阀的内部通道将供油送到制动器端口 (4) 。 这些机油经由驾驶室制动器阀流回到后松紧调整器。 油从松紧调整器流出后驱动后行车制动器。
释放行车制动器控制装置时，通过制动器端口回流的机油经由油箱端口 (2) 送至液压油箱。
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