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What is Fuel Injection?

Malcolm Tatum
Malcolm Tatum
Malcolm Tatum
Malcolm Tatum

Fuel injection is a system that supplies a vehicle's fuel directly into the cylinders of into the intake manifold of the engine, eliminating the need for a carburetor. This intake manifold is found ahead of the cylinders in most fuel injected engines. How much gas is supplied to the engine is monitored by electronic sensors that ensure that the correct amount is available to meet the speed required. As long as the electronic sensor is working properly within the system, the chances of the automobile engine choking or flooding are almost non-existent.

There are some variations on the actual components of fuel injection systems. For example, throttle body systems will have the actual injectors located in the throttle body housing, where they supply the fuel to the intake manifold first. Single point systems provide the fuel directly to the cylinders from a single injector, while multi-port fuel injection systems will use a ratio of one injector for each cylinder in the engine. While there is some disagreement about which variation is more efficient, most supporters believe that any of the methods will provide a superior fuel and air mixture than the use of a carburetor.

Fuel injection systems supply fuel directly to the cylinders of a vehicle's engine.
Fuel injection systems supply fuel directly to the cylinders of a vehicle's engine.

To make sure that the fuel properly mixes with air and also reaches the combustion chamber efficiently, a pump will provide pressure to the injectors. The electronic sensor uses the pressure of the pump to help regulate the amount of fuel that is injected at any given time. The pump responds directly to the amount of pressure applied to the gas pedal, which will then engage the electronic sensor and ensure that the correct amount of fuel is injected to allow the car to accelerate or maintain its speed.

Fuel injection systems eliminate the need for a carburetor.
Fuel injection systems eliminate the need for a carburetor.

While engines using fuel injection tend to have fewer operational issues than those that have a carburetor, the process for isolating and repairing a problem can be more costly. Still, the benefits of engine efficiency, coupled with a more economic use of fuel, make the system very attractive to many automobile owners. As the technology continues to be refined, the incidence of engine trouble will probably decrease even further.

Malcolm Tatum
Malcolm Tatum

After many years in the teleconferencing industry, Michael decided to embrace his passion for trivia, research, and writing by becoming a full-time freelance writer. Since then, he has contributed articles to a variety of print and online publications, including WikiMotors, and his work has also appeared in poetry collections, devotional anthologies, and several newspapers. Malcolm’s other interests include collecting vinyl records, minor league baseball, and cycling.

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Malcolm Tatum
Malcolm Tatum

After many years in the teleconferencing industry, Michael decided to embrace his passion for trivia, research, and writing by becoming a full-time freelance writer. Since then, he has contributed articles to a variety of print and online publications, including WikiMotors, and his work has also appeared in poetry collections, devotional anthologies, and several newspapers. Malcolm’s other interests include collecting vinyl records, minor league baseball, and cycling.

Learn more...

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    • Fuel injection systems supply fuel directly to the cylinders of a vehicle's engine.
      By: nui7711
      Fuel injection systems supply fuel directly to the cylinders of a vehicle's engine.
    • Fuel injection systems eliminate the need for a carburetor.
      By: fantasy
      Fuel injection systems eliminate the need for a carburetor.
    • Owners of a vehicle with a fuel injection system experience fewer operational issues than with an automobile that has a carburetor.
      By: Kurhan
      Owners of a vehicle with a fuel injection system experience fewer operational issues than with an automobile that has a carburetor.