Air Conditioning and Heating System Sensor Operation
水温传感器
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| 图 1 | g00468069 |
水温传感器用来检测流入加热器芯的发动机冷却液温度。 传感器随后向控制模块发回信号。 此传感器位于加热器芯的后侧。
空气温度传感器（再循环空气）
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| 图 2 | g00468147 |
此传感器用来检测驾驶室内的温度。 传感器随后向控制模块发回信号。 此传感器位于再循环空气的入口。
蒸发器（霜冻）传感器
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| 图 3 | g01130938 |
(R) 电阻（Ω） (T) 温度 °C（°F） | |
蒸发器（霜冻）传感器是一种半导体。 温度升高时，电阻降低。 相反，当温度降低时，电阻升高。
蒸发器（霜冻）传感器位于蒸发器 (8) 的出口侧。 蒸发器（霜冻）传感器用来检测从蒸发器 (13) 时经过冷却空气的温度。 传感器随后向控制面板内的放大器发回信号。
当温度低于 3°C (37°F) 时，控制面板将空调离合器接合。 空气温度大于等于 4°C (39°F) 时，空调离合器接合。 此传感器还可防止蒸发器冻结。
继电器开关
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| 图 4 | g01130997 |
此继电器开关用来接合空调离合器。 此继电器还用来分离空调离合器。
HI 风扇转速也受这种继电器的控制。
参考关于这两个继电器的位置，请参阅示意图, "空调电气系统"。
Caterpillar Information System:
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