1. Electronic Control Unit (ECU): The ECU is the brain of the EFI system. It receives signals from various sensors and calculates the amount of fuel and timing to inject into the engine's cylinders.
2. Fuel Injectors: Instead of a traditional carburetor, EFI systems use fuel injectors to spray a precise amount of fuel directly into the engine's intake ports or cylinders.
3. Fuel Pressure Regulator: The fuel pressure regulator ensures that the fuel injectors receive the correct fuel pressure for optimal performance.
4. Oxygen Sensors: Oxygen sensors monitor the amount of oxygen in the exhaust gases and provide feedback to the ECU about the fuel-to-air ratio. This information helps the ECU adjust the fuel injection accordingly to maintain the ideal air-fuel mixture.
5. Mass Air Flow Sensor: The mass air flow sensor measures the amount of air entering the engine and provides this information to the ECU. This data is used to calculate the appropriate amount of fuel to inject.
6. Throttle Position Sensor: The throttle position sensor monitors the position of the accelerator pedal. This information is used by the ECU to determine how much air is entering the engine and adjust the fuel injection accordingly.
7. Coolant Temperature Sensor: The coolant temperature sensor measures the temperature of the engine coolant and provides this information to the ECU. The ECU adjusts the fuel injection based on the coolant temperature to ensure optimal fuel delivery.
8. Intake Air Temperature Sensor: The intake air temperature sensor measures the temperature of the air entering the engine's intake. The ECU uses this data to adjust the fuel injection to account for changes in air density.
The benefit of an EFI fuel system is its ability to precisely control the fuel injection process, resulting in improved fuel efficiency, reduced emissions, better engine performance, and smoother acceleration.
