ilmamäärämittarista

Ilmamäärämittari, often referred to as an air flow meter or mass airflow sensor (MAF sensor) in English, is a crucial component in modern internal combustion engines. Its primary function is to measure the amount of air entering the engine. This measurement is essential for the engine control unit (ECU) to calculate the correct amount of fuel to inject for optimal combustion.

There are several types of ilmamäärämittari, with the most common being hot-wire and hot-film types. The hot-wire sensor uses a heated wire that is cooled by the incoming air. The ECU measures the electrical current needed to keep the wire at a constant temperature, which is directly proportional to the air mass flowing past it. Hot-film sensors operate similarly but use a heated film instead of a wire.

The data provided by the ilmamäärämittari is critical for maintaining the correct air-fuel ratio. An incorrect air-fuel ratio can lead to poor engine performance, increased fuel consumption, higher emissions, and potentially engine damage. A malfunctioning ilmamäärämittari can cause symptoms such as rough idling, hesitation during acceleration, stalling, and illuminated check engine lights. Regular maintenance and, if necessary, replacement of the ilmamäärämittari are important for ensuring the efficient and reliable operation of a vehicle's engine.