What are car injectors, whats the purpose and how do they work
TLDR: they squirt fuel into the engine
Cars run on a mixture of fuel and air.
Traditionally this mixing would have happened inside of a carburetor, but this has since been replaced with fuel injection (for the most part).
Fuel injectors spray atomized fuel into the pistons. This creates a better mixture therefore and more efficient combustion.
With fuel injection you get much more control on how much fuel you use, the spray pattern, and can more easily adjust it with a computer based on varying conditions.
Using Fuel injection generates more power and provides greater fuel efficiency, and allows you to run a smaller engine for the same amount of umph.
A fuel injector is the piece of hardware that is used to spray fuel into the combustion chambers of your engine. The fuel pump takes fuel from your gas tank, and pushes it up the fuel line, into the fuel injector, which sprays the gasoline in a VERY FINE (atomized) mist into the combustion chamber where the spark plug will ignite the mist, causing the explosion that causes the piston in the chamber to push down, turning the crank, and driving the vehicle.
Gasoline in liquid form doesn’t explode, and is even pretty difficult to burn. When gasoline becomes a gas (gas like air, not gas-short for gasoline) it is able to ignite and explode. So it’s the fuel injector’s job to get the gasoline into the combustion chamber in a gaseous form that can explode in a uniform and efficient way.
They deliver fuel into the cylinders to be burned.
Older cars had a device called a carburettor, which can be explained fairly simply – it takes the air that gets drawn into the engine, and mixes atomised fuel with it, before sending that charge of air+fuel into the cylinder where it’s burned.
Carburettors in reality are fantastically complex and carefully designed items from an engineering standpoint – they’re a wonder that they do what they do well. So they require setting up, adjustment and so on.
Fuel injection takes the carburettor side out of it, and injects fuel directly into the cylinders, via a fuel pump, and a fuel distributor, which respectively pressurise and direct the fuel to where it goes. The injector itself atomises the fuel as it goes into the cylinder, allowing it to burn. This all allows for things like more predictable starting and running behaviour, but primarily they’re more efficient. The amount of fuel being injected can be precisely controlled for peak efficiency, far in excess of what can be achieved with a carburettor.
Do you mean fuel injectors in cars?
They do exactly what the name implies: inject fuel into the engine. They take pressurized fuel provided by a fuel pump and inject it into the engine when they receive an electronic signal to do so. Each one is located where it can spray the fuel directly at the intake valve for the cylinder it provides fuel to.