What is the function of the mass air flow (MAF) sensor?

The mass air flow (MAF) sensor plays a crucial role in the engine management system by measuring the volume and density of air entering the engine. This information is vital for achieving optimal air-fuel mixture, which is necessary for efficient combustion. By accurately measuring the amount of air flowing into the engine, the MAF sensor allows the engine control unit (ECU) to calculate the correct amount of fuel to inject, ensuring that the engine runs smoothly, efficiently, and with minimal emissions.

In essence, the MAF sensor directly impacts the performance of the engine by enabling precise fuel delivery in relation to the intake air, which is fundamental for maximizing power and fuel efficiency while reducing emissions. This function helps to maintain proper engine operation under varying conditions, such as changes in load or acceleration. Understanding the role of the MAF sensor helps technicians and students appreciate how critical it is for optimal engine performance.