What are car injectors, whats the purpose and how do they work
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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.
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