It is very important to buy a car engine. Although they are all engines, the technology is indeed different. Today we will talk about the fuel injection technology of the engine. Everyone knows that the reason why the engine can work is because the combustion of gasoline makes the piston move and work, and the engine can operate normally. The gasoline burned in the cylinder is atomized and injected through the fuel injector. People say that direct injection is good, fuel-efficient, and good power. The multi-point EFI method is said to be cheap and worry-free and less carbon deposits. Which one is better, let's talk a little bit.

 

The first is the very traditional carburetor fuel supply. This type of fuel supply method is very old, expensive and troublesome. Carburettor fuel supply vehicles are no longer on the market. Skip it here.

 

There is also a multi-point EFI fuel supply method. This method is to install the injector on the intake pipe of each cylinder. The gasoline injection is injected into the cylinder from multiple places (at least each cylinder has an injection point). of. The control of the air-fuel ratio is more precise, and the fuel injection can be carried out according to the timing, and the fuel injection quantity and fuel injection timing can be precisely controlled.

 

In-cylinder direct injection refers to the direct injection of fuel into the combustion chamber of the cylinder for smooth and efficient combustion. The advantage of direct injection is manifested at low load. At low load, the fuel injection nozzle only sprays the minimum amount of oil around the spark plug, and the rest of the cylinder is air. During combustion, the air layer will isolate the heat, which can reduce the transfer of heat to the cylinder wall, thereby reducing the heat loss and improving the thermal efficiency of the engine.

 

Generally speaking, compared to direct injection, multi-point EFI is more economical in maintenance and more mature in technology, but it is not as obvious as direct injection in terms of fuel consumption, which will increase fuel consumption to a certain extent. Direct injection is more accurate and burns better than multi-point EFI, which can save fuel and achieve greater horsepower. However, direct injection has higher requirements than multi-point EFI. If the fuel is lower Under the circumstances, the carbon deposition problem of direct injection engines will be relatively serious. This can be used with gasoline additives or frequent carbon deposition cleaning and maintenance.