Main differences between carburetor and EFI

There is a big difference. This is a fundamental change. The working principle of carburetor oil supply system is to use the negative pressure generated by crankshaft rotating piston to suck oil into the engine, thus moving the combustion chamber volume. The function of carburetor is to provide atomized gasoline with the best mixing ratio for the engine when the engine speed and load change frequently. It can be said that it is an open-loop control oil supply system. The EFI engine pumps the pressurized fuel into the high-pressure rail through the electric fuel pump inside the fuel tank, and the pressure is very high. ECP—— of about 2.5mpa-that is, the central controller is responsible for collecting intake pressure signal, throttle position signal, intake temperature signal, engine speed signal and exhaust oxygen content signal, and controlling the fuel injector to inject gasoline into the combustion chamber at an appropriate time according to the above signals. The fuel injector is electromagnetically controlled. 1 There are two kinds. Installed on the intake pipe, it is called single-point EFI, which is no longer used. 2。 Installed in each combustion chamber, (referring to the spark plug) directly injects fuel into the combustion chamber, which is called multi-point injection. Better performance. But the working conditions are very poor. I suggest you go to the bookstore to buy books about EFI cars. I used to study radio, and I know something about it. I am also a fan, but I am not a professional after all. The above explanation is not complete. Please forgive me.