IMS Operation and Service of Gasoline Fuel Systems

A valve in the carburetor that controls the airflow to the engine, providing a richer air/fuel mixture for easier cold starting.

A valve in the carburetor that regulates the amount of fuel flowing from the tank to the carburetor, ensuring a constant fuel level in the bowl.

A narrow section in the carburetor that accelerates the airflow, creating a low pressure area to draw fuel from the bowl.

The main valve that controls the amount of air entering the engine, affecting its speed.

A small opening within the carburetor that provides fuel for idle speeds.

A small opening within the carburetor that provides extra fuel when the engine revs up.

A device that breaks down gasoline into smaller particles for easier vaporization and mixing with air.

The process of turning liquid gasoline into a vapor for efficient burning in the engine.

The mechanical device that controls the speed of an engine by balancing the tension of the throttle spring against the engine's force or pressure.

A spring that creates tension when stretched, controlling the throttle valve's opening and closing.

The process where the governor repeatedly adjusts the throttle valve to find the balance point between the throttle spring's tension and the engine's force.

A type of governor that uses spinning flyweights to create a balancing force against the throttle spring, controlling the engine speed.

Weights that spin due to the engine's rotation and generate centrifugal force, which counteracts the throttle spring's tension.

The position of the throttle lever determines the desired engine speed.

The engine should not be adjusted without consulting an expert.

A type of fuel injection system where the injectors release fuel directly into the combustion chamber.

A fuel injection system that uses multiple injectors, typically one per cylinder, to atomize fuel close to the intake port.

A fuel injection system that injects fuel at a single point, usually into a throttle body.

A fuel injection method where fuel is delivered continuously to the injector nozzles, with the flow adjusted to maintain the air/fuel ratio.

A fuel injection method where the injector nozzles open and close electronically or mechanically, controlling the amount of fuel injected based on the duration of the opening.

A system that maintains a steady flow of fuel from the tank to the engine.

A component in a fuel injection system that removes impurities from the fuel before it reaches the engine.

A component in a fuel injection system that pumps fuel from the tank to the engine.

A plate connected to the flyweights, which acts as a lever to adjust the throttle valve position.

A modern method of supplying fuel to an engine, replacing carburetors and offering greater precision and control.

Components within an EFI system that atomize fuel into tiny droplets, creating a more efficient air/fuel mixture.

A pump in an EFI system responsible for delivering the correct amount of fuel to the injectors.

A component in fuel injection systems that precisely meters and delivers gasoline to the injectors at the correct time.

Small devices attached to the fuel injectors that atomize and spray gasoline into the engine's intake system, ensuring proper fuel distribution.

A valve responsible for controlling the flow of fuel through the injector nozzle. It remains closed until an electronic signal from the computer opens it, allowing fuel to be released into the engine.

A spring inside the injector nozzle providing tension to keep the nozzle valve closed until an electronic signal opens it.

A component in injector nozzles specifically designed to disperse fuel into a fine spray, enhancing combustion efficiency.

The main body housing for the injector nozzle, containing internal parts and receiving pressurized fuel.

Electronic components that monitor engine conditions and send data to the computer, ensuring proper fuel delivery and engine performance. Examples include oxygen sensors, throttle position sensors, and temperature sensors.

A central processing unit in fuel injection systems that analyzes data from sensors, controls fuel delivery, and manages engine performance based on the information received.

Ability of liquid fuel to change into vapor, influencing how easily it ignites and burns.

A computer system that manages and controls electronic systems, like fuel injection.

The fuel's resistance to knocking or premature detonation during combustion.

Never inspect fuel leaks with your bare hands.

Always wear eye protection when working with fuel injectors.

A trained technician should service electronic fuel injection systems.

Refer to the operator's manual for maintenance and repair procedures.

Fuel injection systems use electronically controlled components to optimize fuel delivery and engine performance.