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针对尿素与水的混合物(AdBlue~)不同温度的声音速度参考值存储在SCR控制单元内。因此控制单元可对实际值与规定值进行比较并通过排放警告灯显示尿素与水的混合物(AdBlue~)出现质量偏差。超声波传感器通过一根带状导线与电子传感器单元相连。在传感器单元内将超声波数值转化为一个SENT协议,SCR控制单元可对该协议进行处理。在“停留-驻车-行驶”状态下,
Sound speed reference values for different temperatures of urea and water mixtures (AdBlue ~ 存) are stored in the SCR control unit. The control unit therefore compares the actual value with the specified value and displays a mass deviation of the urea-water mixture (AdBlue ~ ) through the emission warning lamp. The ultrasonic sensor is connected to the electronic sensor unit via a strip conductor. The ultrasonic values are converted into a SENT protocol within the sensor unit, which can be processed by the SCR control unit. In the “stop - parking - driving ” state,