The working principle of the automobile temperature sensor is based on the principle that the properties of substances change with temperature, mainly through the contact or non-contact method to measure the temperature. Contact sensors such as thermal resistance, its resistance value changes with temperature; Non-contact sensors such as thermocouples sense temperature through thermoelectric effects. The sensors work by monitoring changes in resistance, converting their physical signals into digital signals, which are then sent to the vehicle's electronic control unit (ECU) for processing
Advantages
Accurate temperature control : The temperature sensor can monitor the temperature inside and outside the car in real time. By comparing with the temperature inside the car, the air conditioning system can be adjusted to ensure that the environment inside the car is always in a comfortable state. For example, in cold weather, the sensor will prompt the ECU to increase fuel supply, helping the engine quickly reach the appropriate operating temperature; In hot weather, it adjusts the air conditioning system to ensure a comfortable interior environment
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system protection : The temperature sensor plays an important role in the adjustment unit, according to the sensor signal to calculate the required air temperature and air volume, to ensure that the temperature in the carriage is automatically adjusted within the range set by the driver. If the temperature sensor of the engine is faulty or the signal is inaccurate, the heat dissipation may be insufficient. The air conditioning system automatically enters the protection mode and stops working to protect the engine
