Disadvantages of Multi-Point Fuel Injection?

[OCameron]

Multi-point fuel injection has the disadvantages of relatively complex structure, higher cost, and higher fuel consumption. In multi-point fuel injection, each cylinder's intake port is equipped with a fuel injector, controlled by the ECU for individual cylinder injection or group injection. Gasoline is injected in front of each cylinder's intake, then mixed with air to form a combustible mixture before entering the cylinder. 1. Advantages of multi-point fuel injection: high combustion efficiency, the same displacement can release more power, sequential injection can be adopted, so the air-fuel ratio control is more precise than single-point injection, resulting in better emissions and more fuel economy for multi-point injection engines. 2. Disadvantages of multi-point fuel injection: higher requirements for fuel quality, including engine oil, more complex structure, and thus higher cost.