Electrical Input Components
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| 图 1 | g01950068 |
电气输入部件 | |
传感器
这些传感器向 ECM 提供变化的工况信息。 传感器信号根据变化情况相应地变化。 机器 ECM 识别以下类型的传感器信号。
频率 - 这类传感器产生信号的频率随工况变化。
脉冲宽度调制传感器（PWM） - 这类传感器产生占空比随工况变化的数字信号。 这个频率信号的频率恒定。
转速传感器（变速箱输出）
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| 图 2 | g00899623 |
转速传感器用于测量变速箱的输出转速。 测得的值用于控制升档和降档。 测得的值控制换档。 该传感器是 ECM 的一个输入设备。 该传感器与触点 "J1-2" 和 "J1-3" 相连。
温度传感器（变速箱油）
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| 图 3 | g00945447 |
液压油温传感器是 ECM 的输入装置。 传感器向 ECM 提供输入信号，该信号还发送到仪表组。 该传感器通过触点 J1-11、J1-21 和 J1-36 与 ECM 相连。
开关
开关向 EMC 输入发送打开信号、接地信号或蓄电池正极信号。 开关可断开或闭合。
- 开关断开时，没有信号发送至相应的 ECM 输入。 当没有信号时，这种情况被称为浮动状态。
- 当开关闭合时，向 ECM 的相应输入装置提供接地信号或正极蓄电池信号。
开关（自动换档）
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| 图 4 | g00901156 |
"自动/手动"开关将选择变速箱操作类型。 当自动/手动开关输入 1 接地，自动/手动开关输入 2 开路时，即已选定自动换档模式。 如果两个输入的状态相同，机器默认为换档操作。 开关通过触点 J1-27 和 J1-28 与 ECM 相连。
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