What type of automobile air temperature sensor is it?

There are four main types of temperature sensors: thermocouple, thermistor, resistance temperature detector (RTD) and IC temperature sensor.

The air temperature sensor has a negative temperature coefficient. Temperature increases, resistance decreases, temperature decreases and resistance increases. With the change of resistance in the circuit, the voltage changes and different voltage signals are generated.

Complete the automatic operation of the control system. When the car is cold, the signal of the air temperature sensor is basically the same as that of the engine water temperature sensor, while when the car is hot, its signal voltage is about 2~3 times that of the water temperature sensor.

Wing: The wing-type air flow sensor belongs to the volumetric flow type, with simple structure and low cost. However, its moving parts occupy a large intake area, which reduces the fluidity of the intake system and increases the intake resistance, so it is rarely used now.

Carmen vortex street type: Carmen vortex street air flow sensor belongs to volumetric flow type and is widely used in Toyota and Mitsubishi motors. The sensor has the characteristics of small volume, light weight, no wear, simple air intake, low air intake resistance, high detection accuracy and fast response, but the cost is high, and it is mostly used in high-end cars.

Hot-wire type: Hot-wire air flow sensor belongs to mass flow type, which can directly detect the mass flow of intake air without correcting intake air temperature and atmospheric pressure. Because the sensor has no moving parts, the intake resistance is small, the response characteristics are good, and it can correctly detect the intake when it suddenly decelerates, so it is widely used.