Solenoid Valve (Pilot On/Off)
电磁阀（先导断开）
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| 图 1 | g03057565 |
(1) 滑阀 (2) 来自风扇/充油泵的先导油进口 (3) 至蓄能器的油道 (4) 先导油回流通道 (5) 弹簧 (6) 先导供油油道 (7) 至机具泵的负载感应 (8) 电磁阀 | |
当机具锁止开关处于锁止位置时，常开触点接通接地，常闭触点打开。 机器 ECM 将系统状态解读为锁止机具系统的操作员请求。 ECM 没有接通电磁阀 (8) 。 因此，弹簧 (5) 强迫滑阀 (1) 向左移动。 滑阀 (1) 挡住来自先导油进口 (6) 的先导油。
滑阀 (1) 打开来自油道 (6) 的先导供油路径，以通过油道 (4) 流回液压油箱。
电磁阀（先导接通）
当机具锁止开关处于解锁位置时，常开触点打开，常闭触点接通接地。 机器 ECM 将系统状态解读为解锁机具系统的操作员请求，并接通电磁阀 (8) 。 电磁阀 (8) 克服弹簧 (5) 的压力，同时滑阀 (1) 向右移动。
先导油从风扇/充油泵流入先导油进口 (2) 。 先导油从进口 (2) 经过滑阀 (1) 流入到各控制阀电磁阀的通道 (6) 。
Caterpillar Information System:
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