770 and 772 Off-Highway Truck Hydraulic and Braking System Caterpillar


Secondary Brake System

Usage:

770 BZZ

辅助制动器控制踏板的位置




图 1g01262958

(1) 辅助制动器控制踏板

辅助制动器控制踏板 (1) 位于驾驶室地板的左侧。 踏下辅助制动踏板(1)时,内部滑阀引导油从行车制动器蓄能器中流出,以接合前行车制动器。

辅助制动踏板还移动位于辅助制动踏板后面的辅助转动踏板位置传感器。 此位置传感器向机器电子控制模块(底盘 ECM)发送 PWM 信号。 底盘 ECM 成比例地控制停车制动器电磁阀,以排出停车制动器油。 底盘 ECM 还通过控制停车制动器电磁阀接合后终传动上的停车制动器。

如果行车制动器功能异常,应利用辅助制动器停止机器。

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