What is the function of the Engine Control Unit (ECU)?

The Engine Control Unit (ECU) plays a critical role in modern engine management systems by determining the correct amount of fuel to inject and scheduling the timing for that injection. It processes data from various sensors monitoring parameters such as engine temperature, air flow, throttle position, and more. Based on this real-time data, the ECU adjusts fuel delivery and ignition timing to optimize engine performance, fuel efficiency, and emissions. This capability allows for a more efficient combustion process and contributes to overall engine reliability and responsiveness.

This function is pivotal because accurate fuel metering and timing adjustments are essential for achieving optimal engine operation under various load conditions and driving scenarios. The ECU continuously adapts to ensure that the engine operates smoothly, minimizing the risk of knocking and ensuring that power output meets the driver's demands.