Changes in the intake air temperature of a car engine can lead to changes in air density, which in turn affect the fuel mixture ratio and combustion efficiency. Therefore, engine is equipped with intake air temperature sensor for real-time monitoring to ensure normal operation. This is based on the characteristic that the resistance value of the EXSENSE automotive-grade NTC thermistor in the intake air temperature sensor decreases exponentially with the increase in temperature. The ECU can then adjust fuel injection and ignition timing based on the temperature feedback, keeping the air-fuel ratio in the ideal range.

During a cold start of car, the intake air temperature is relatively low, and the resistance value of the EXSENSE automotive-grade NTC thermistor in the intake air temperature sensor is high. At this time, the voltage signal output by the voltage divider is relatively high. When the ECU receives this high voltage signal, it increases fuel injection accordingly to meet the fuel need of the engine during cold start, ensuring smooth start of the car. As the car runs and the intake air temperature gradually rises, the resistance value of NTC thermistor decreases, the voltage from the divider drops, and the ECU reduces fuel injection to maintain the proper air-fuel mixture concentration.

Using an intake air temperature sensor with EXSENSE automotive-grade NTC thermistor helps the engine burn fuel fully for adequate power while effectively reducing unnecessary fuel consumption and harmful emissions. This relies on several key advantages of EXSENSE automotive-grade NTC thermistor:

1. High-temperature resistance for harsh conditions

Under high engine loads, intake air temperature can rise sharply, sometimes exceeding 150℃ in extreme conditions. EXSENSE automotive-grade NTC thermistor can withstand high temperatures and accurately sense intake air temperature, providing real-time data to the ECU.

2. High accuracy for precise control

With ±1% high accuracy, EXSENSE thermistor helps the intake air temperature sensor obtain precise engine air temperature values. The ECU uses this information to optimize fuel usage and reduce exhaust emissions.

3. Fast response for real-time junction temperature feedback

Intake air temperature changes rapidly with engine operating conditions, especially during engine starting, acceleration, and deceleration, air intake temperature change more frequently. The excellent sensitivity of EXSENSE automotive-grade NTC thermistor ensures that the intake air temperature sensor can track temperature changes promptly, maintaining stable engine operation.

With the support of EXSENSE automotive-grade NTC thermistor, intake air temperature sensor can operate reliably under long-term high-temperature conditions of engine, continuously providing data to the ECU and preventing issues like imbalanced air-fuel ratio, leading problems such as insufficient power, increased fuel consumption, or excessive emissions. Moreover, EXSENSE automotive-grade NTC thermistor has passed IATF 16949 certification. And the production process strictly follows VDA 6.3 and AEC-Q200 standards, ensuring excellent reliability to support the efficient operation of intake air temperature sensor.