Core pulling module 1. Measurement channel cover 2. Upper cover plate 3. Sensor processing circuit 4. Circuit carrier board 5. Core pulling Air flow meter regulator 1. Core pulling module 2. Air flow direction 3. Air filter Working principle The heat from the thermal sensor in the air flow meter is dissipated by the incoming air, and the greater the air flow rate, the more heat disappears. The resulting temperature difference is used to measure the air flow rate flowing through it. The peripheral hybrid processing circuit can process data to obtain accurate measurement data and air flow direction Application and pin definition In order to comply with legal requirements for vehicle emission limits, it is necessary to continuously and accurately measure the air fuel ratio. This requires the sensor to accurately match the actual air flow rate with the output voltage signal, and develop and closed-loop control circuits through electrical signals