õhuvooluandur

õhuvooluandur

An õhuvooluandur, also known as a mass air flow sensor (MAF sensor) or air flow meter, is a component used in modern internal combustion engines. Its primary function is to measure the amount of air entering the engine. This information is crucial for the engine control unit (ECU) to determine the correct amount of fuel to inject for optimal combustion.

There are several types of õhuvooluandur, but the most common are the hot-wire and hot-film types. The hot-wire sensor uses a heated wire that is cooled by the incoming air. The amount of cooling is directly proportional to the mass of the air flowing past it. A circuit measures the current required to maintain the wire's temperature, which in turn indicates the air mass. The hot-film sensor works on a similar principle but uses a heated film instead of a wire.

The õhuvooluandur plays a vital role in engine performance, fuel efficiency, and emissions control. By accurately measuring airflow, the ECU can adjust fuel delivery to match the air intake, preventing issues like rich or lean fuel mixtures. A malfunctioning õhuvooluandur can lead to poor engine performance, increased fuel consumption, rough idling, and illuminated check engine lights. Regular maintenance and timely replacement of a faulty sensor are important for maintaining the health of the engine.