How does a mass air flow (MAF) sensor contribute to fuel metering?

The mass air flow (MAF) sensor plays a crucial role in fuel metering by measuring the amount of incoming air entering the engine. This sensor provides the engine control unit (ECU) with real-time data about the air mass flowing into the engine. Accurate measurement of air mass is essential because it directly influences the fuel injection process.

By knowing the precise amount of air, the ECU can calculate the appropriate amount of fuel needed for optimal combustion. This ensures the air-fuel mixture remains within the ideal ratio for efficient combustion, enhancing engine performance, fuel efficiency, and reducing emissions. Thus, the MAF sensor is integral to maintaining the balance between air and fuel, which is a fundamental aspect of fuel metering systems.