The main function of the MAF sensor is to precisely measure the amount of air entering the engine. This information is critical to optimizing engine performance and controlling exhaust emissions. The ECU adjusts the fuel injection system and ignition timing using the data it receives from the MAF sensor. Thus, the engine operates efficiently and stably under different operating conditions (for example, acceleration, deceleration or idling).
MAF sensors generally come in two main types:
The hot wire MAF sensor measures air flow around a heated wire. The wire is maintained at a certain temperature, and as air flow increases, the temperature of the wire decreases. The amount of energy required to keep the temperature of the wire constant is a measure of air flow. This energy is transmitted to the ECU as an electrical signal.
In this type of sensor, air flow moves a vane. The position of the fin determines the amount of air entering the engine. The movement of the vane is converted into an electrical signal by a mechanism such as a potentiometer and transmitted to the ECU.
A thermistor is a component that measures temperature. It monitors the temperature of the hot wire or film layer and detects temperature changes based on the amount of air flow.
It is the structure that contains and protects all components of the MAF sensor. It is usually made of plastic or metal, allowing the sensor to be mounted securely in the engine compartment.
These are the electrical connection points that connect the MAF sensor to the engine control unit. These connectors allow data from the sensor to be transmitted to the ECU.
Some MAF sensors have an integrated air filter to protect the sensitive measuring elements inside the sensor. This filter prevents large particles from damaging the sensor.
These are channels that direct the air flow within the sensor so that the air can be measured accurately. These channels direct the air flow towards the measuring element and provide a stable measurement.
