What is the difference between multi-point injection and direct injection engines?

[StTessa]

Multi-point injection and direct injection engines have the following differences. Multi-point injection engine: Multi-point injection, as the name suggests, means that each injector has multiple spray holes. It directly injects fuel into the intake manifold of each cylinder, which then enters the corresponding combustion chamber. Each cylinder has one injector. Multi-point injection engines are the result of matured electronic fuel injection technology and are currently mainstream products. Direct injection engine: Direct injection, also known as FSI, directly injects fuel into the cylinder, where it mixes with air to form a combustible mixture. This maximizes the efficiency of every drop of fuel but places higher demands on the injector due to the high-temperature and high-pressure environment inside the cylinder.