M313D, M315D, M315D Series 2, M315D2, M316D, M317D Series 2, M317D2, M318D, M320D2, M322D, M322D 2 MH, M322D2 and M324D 2 MH Wheeled Excavators Electronic System Caterpillar


Swing Brake Function

Usage:

M315D2 CA4



图 1g02461057

回转制动器功能部件的连接

回转制动器功能使操作员能够立即停止机器回转功能。 机器 ECM 会监控左操纵手柄回转制动器开关输入电路和回转先导压力开关输入电路以控制回转制动器。 ECM 将利用回转制动器电磁阀来激活回转制动器。

回转制动器电磁阀与机器 ECM 上的一个 PWM 输出电路相连。 ECM 将此电磁阀用作接通 / 断开电磁阀。

在机器运转期间,当回转制动器电磁阀没有激发时,回转制动器接通。

ECM 将利用回转先导压力开关输入电路的状态来确定是否存在回转请求。 当开关电路接地(触点闭合)时,ECM 将确定有激活的回转请求。

当存在机器回转请求时,ECM 将激发回转制动器电磁阀以断开回转制动器。 必须存在以下机器条件,ECM 才会激发电磁阀:

  • 左控制台位于降下位置。

  • 机具锁定功能断开。

  • 左操纵手柄上的回转制动器开关没有按下(开关触点打开)。

  • 按照回转先导压力开关的指示(触点闭合),回转请求正在进行。

当回转先导压力开关触点打开,表示回转请求不再存在,ECM 将使用一个可编程"回转制动器延迟时间"参数,在设定时间延迟期间内对回转制动器电磁阀断电。 可以使用 Cat ET 对该时间延迟参数进行配置。

当机器正在回转时,如果操作员按下了左操纵手柄上的回转制动器开关,ECM 将立即对回转制动器电磁阀断电,以激活回转制动器。 操作员开关的优先级高于其他所有能够激活回转制动器的条件。

以下任一种情况都会导致 ECM 对回转制动器电磁阀断电以立即激活回转制动器。

  • 左控制台位于上升位置。

  • 机具锁定功能接通。

  • 左操纵手柄上的回转制动器开关按下(开关触点闭合)。

如果左扶手位置开关有故障,ECM 会对回转制动器电磁阀断电以激活回转制动器。

Caterpillar Information System:

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