What is the difference between electronic fuel injection engines and direct injection engines?

[DePaige]

Electronic fuel injection engines and direct injection engines differ in their fuel injection methods: electronic fuel injection engines mix fuel with air in the intake manifold before it enters the cylinder for combustion, while direct injection engines inject fuel directly into the cylinder for combustion. Characteristics of electronic fuel injection include: 1. The gas mixes with gasoline in the intake manifold, resulting in a more uniform mixture; 2. The fuel injector angle is precisely aligned with the intake valve, allowing gasoline to clean carbon deposits on the valve to some extent during injection. Characteristics of direct injection include: 1. High precision in fuel injection, eliminating concerns about gasoline adhering to the intake manifold; 2. Direct injection into the cylinder can increase the compression ratio, and atomized gasoline directly lowers the temperature inside the cylinder; 3. Enables stratified combustion.