Engine Fuel Injection System Concepts

The video tutorial explains the Electronic Fuel Injection (EFI) system, which electronically controls the fuel and air mixture for optimal engine performance and efficiency. It describes the activation of the EFI system, the role of various sensors like manifold pressure, throttle position, and temperature sensors, and how they influence fuel injection. The tutorial also covers the fuel injection process and the role of the oxygen sensor in adjusting the air-fuel mixture to achieve an ideal balance.

What is the primary function of the EFI system?

• To control the air conditioning

• To provide the correct mixture of fuel and air

• To manage the car's audio system

• To monitor tire pressure

When does the EFI system become active?

• When the car is parked

• When the key is turned to the 'on' position

• When the car is in reverse

• When the headlights are turned on

What does the manifold absolute pressure sensor measure?

• Fuel temperature

• Battery voltage

• Engine oil level

• Air pressure in the intake manifold

Which sensor provides information about the throttle position?

• Water temperature sensor

• Throttle position sensor

• Oxygen sensor

• Fuel pressure sensor

What happens when the intake air temperature is low?

• The ECU turns off the engine

• The ECU increases fuel injection

• The ECU reduces fuel injection

• The ECU activates the air conditioning

What triggers the fuel pump to become active?

• Turning on the headlights

• Pressing the brake pedal

• Turning the key to the 'start' position

• Opening the car door

What is the role of the fuel injector?

• To control the car's speed

• To monitor engine temperature

• To inject fuel into the engine

• To measure air pressure

What does the oxygen sensor monitor?

• The level of oxygen in the fuel

• The speed of the car

• The air-fuel mixture entering the engine

• The temperature of the exhaust gases

What action does the ECU take if the air-fuel mixture is too rich?

• Activates the air conditioning

• Turns off the engine

• Decreases fuel injection

• Increases fuel injection

What is the goal of the continuous adjustment process in the EFI system?

• To maintain a constant engine speed

• To achieve an ideal air-fuel mixture

• To reduce tire wear

• To improve audio quality