So-called "Multi point fuel injection" systems are accurately named but somewhat confusing.
In the beginning, God created the carburettor and saw that it was good. Fuel was delivered to the intake manifold, metered by a butterfly valve allowing more airflow and suction drawing the fuel out of the carby's fuel float. Fuel atomisation was minimal, and the mixture in the airstream was not perfect.
Fuel injectors turned things around. Fuel was pumped through a fine nozzle into the intake manifold that led to the cylinders. This is "single point fuel injection".
Efficiency was further improved when they placed a fuel injector just outside of each intake valve - this is "multi point fuel injection".
They then developed an injector that could withstand the temperature and pressure of combustion, and positioned the injector directly in the top of the combustion chamber - this is "direct injection".
