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

[DiLorenzo]

Here are the differences between direct injection and multi-point injection: 1. Control method: Direct injection is mechanical injection; multi-point injection requires signals such as air flow, water temperature, throttle opening, and engine load for injection. 2. Features: The engine has high fuel injection precision, and there is no need to worry about gasoline adhering to the intake manifold. Direct injection in the cylinder can increase the compression ratio, and atomized gasoline can directly reduce the temperature in the cylinder, achieving stratified combustion; the gas mixes with gasoline in the intake manifold, making the mixture more uniform. The angle of the fuel injector is just right for the valve, and during injection, gasoline can clean the carbon deposits on the valve to a certain extent. It has good reliability and is easy to maintain. The fuel injector is not in the cylinder and is not affected by high temperature and high pressure environments.