Multi-point injection is a fuel injection technology widely used in automobile engines, which is characterized by computer-controlled fuel injection and accurate fuel injection quantity. Compared with the old carburetor, multi-point injection has many advantages, such as fuel saving, uniform injection, good economy and environmental protection. The state restricts the elimination of yellow label vehicles with carburetor through laws and regulations to promote vehicles with EFI.
Extended data
Multi-point injection is relative to single point injection. Single-point injection means that only one nozzle is responsible for injecting oil into each cylinder. The nozzle is located on the intake pipe. Before the intake pipe is divided into intake manifolds, its fuel injection quantity depends on the size of the throttle valve. Due to the different length and position of intake manifold, the amount and time of mixed oil and gas injected into each cylinder are also different, resulting in different working conditions of each cylinder.
Advantages of multi-point injection:
1, the combustion efficiency is high, and the same displacement can release more power.
2. Sequential injection can be used, so the control of air-fuel ratio is more accurate than that of single-point injection, so the multi-point injection engine has better emissions and is more economical and fuel-efficient.
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