Fuel injection is a method of preparing a mixture of fuel and air for internal combustion engines. The fuel injection principle consists of injecting fuel into the intake pipe, intake channel, chamber, cylinder, or compression space through a small opening, or injector nozzle.

To create the most suitable mixture, the fuel in front of the nozzle is compressed to a higher pressure than the pressure in the space into which it is injected. Due to the higher pressure and the small size of the nozzle, the fuel is atomized during the injection, which makes it possible to accelerate the formation of the …

A spark-ignition engine with direct fuel injection is a type of piston combustion engine that, unlike a spark engine with single-point or multi-point fuel injection or carburetor method of mixture preparation, does not burn only a homogeneous mixture.

Fuel is injected directly into the cylinder during the intake or compression stroke using the injection valves, atomizing and vaporizing it before the spark plug ignites the mixture with a spark.