You probably know that your car cannot run without fuel injectors, perhaps the key component of its fuel delivery system, and you probably know that fuel injection systems were invented as a replacement for carburetors. But can you completely answer the question, “What is a fuel injector?” If you’re a little fuzzy on what a fuel injector actually is and what fuel injection does, here’s a little crash course.
How Fuel Injectors Work
A fuel injector is basically a pressure valve that makes sure the combustion chamber has just the right mix of oxygen and fuel by precisely controlling the amount of fuel that goes into each cylinder, with the help of the car’s onboard computer (this computer is also called an ECU, or Electronic Control Unit). This has proven to be a far more efficient solution than the carburetor, which simply involved unloading a large amount of fuel into the combustion chamber whenever the engine required it.
This was a tremendous waste of fuel and resulted in increased unhealthy emissions, as well as greater costs for the gas-buying consumer. It was a rough analog technology, replaced by a precise digital one. Read More