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.

Single-point fuel injection (or SPI in short) is an indirect fuel injection in which fuel is injected via a single injection valve into a common intake manifold chamber upstream of the throttle valve.

This article will briefly explain how single-point fuel injection work and its advantages and disadvantages.

Multi-point fuel injection is denoted by the MPI (Multi Point Injection) abbreviation. In this type of injection, fuel is injected before the intake valve using injection valves assigned to individual cylinders.

This means that one injection valve is assigned to each cylinder, which delivers the required fuel for that cylinder.

Common Rail, abbreviated CR, is a fuel injection system for petrol and diesel engines. The Common Rail system is equipped with a high-pressure reservoir that can withstand the high pressure of the fuel pump.

The fuel injected into the cylinder is dispersed through several smaller injector holes requiring higher pressure. The fuel injected in this way forms a better combustible mixture, thanks to which the engine has greater efficiency.