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What are the characteristics of temperature sensors in automotive electronic control systems?

1 Answers

DeRose

07/29/25 8:05pm

The characteristics of temperature sensors in automotive electronic control systems are that the higher the temperature at the measurement point, the lower the resistance value of the sensor, and the lower the output voltage signal. Related knowledge about temperature sensors: 1. Composition: Most temperature sensors in automobiles are negative temperature coefficient thermistors. 2. Classification: intake air temperature sensor, coolant temperature sensor, transmission oil temperature sensor, clutch temperature sensor G509, temperature sensor on the air compressor, and air conditioning temperature sensor. 3. Partial fault analysis: The higher the intake air temperature sensor temperature, the richer the air-fuel mixture. A short circuit or poor grounding of the sensor can cause the mixture to be too lean, leading to difficulty in starting. If the engine coolant temperature sensor is short-circuited, the data stream will show a high temperature above 100℃, causing the mixture to be too lean and preventing startup. If the sensor is open-circuited or the grounding wire has poor contact, the data stream will show a low temperature below -30℃, causing the mixture to be too rich, resulting in black smoke from the exhaust pipe, etc.

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