What are the main components of the fuel system of automobile gasoline engine?

The fuel supply system is mainly composed of fuel tank, low-pressure fuel pipe, fuel delivery pump, fuel filter, fuel injection pump (rotor distribution pump, equipped with fuel injection advance regulator and starting enrichment device, etc. ), high-pressure fuel pipe and injector. The working principle of the fuel supply system is that the fuel pump sucks fuel from the fuel tank, passes through the fuel filter and reaches the oil inlet cavity of the fuel supply pump. The oil supply pump is vane type, and its function is to increase the fuel pressure according to the increase of the engine transmission. Then the fuel reaches the pressure regulating valve, which is used to regulate the fuel pressure in the fuel injection pump; The distributor plunger further increases the oil pressure and delivers the fuel to the injector through the high-pressure oil pipe. The fuel leaking from the fuel injector is recovered by the oil return valve and sent back to the fuel tank.