Detailed Info of IX-11002_15100-61AA0 Fuel Pump
Fuel Gauge Paddle-type Metering Part on Fuel Pump
The working principle of the electric fuel pump is the same as that of the electric pump, which uses the motor to drive the corresponding oil pump device to deliver fuel to the fuel system continuously. It is worth noting that the fuel system must maintain a certain pressure, only in this way can ensure that the atomization effect of the fuel injected by the fuel injector is better and easier to burn.
But when the engine shuts down, the pressure of the fuel system will lose, once there is no residual pressure, it is easy to cause gas resistance in the pipeline at high temperature. In this case, when the engine restarts, because the fuel system is mixed with air, it is difficult to start the engine without sufficient fuel, in view of this, a one-way valve is set in the fuel pump. In this way, when the fuel pump stops running, the one-way valve closes to maintain the residual pressure in the fuel pipeline, which facilitates the engine restart. In addition, I do not know if you have noticed that after your vehicle has been parked for a long time, you will hear the "buzzing" sound in the rear of the vehicle when you turn on the ignition switch but haven’t started the engine. This is not a fault, but to let the electric fuel pump run 2 to 3 seconds to obtain oil pressure so that the fuel system has enough pressure to start the engine. A safety valve is designed to prevent excessive pressure on the oil outlet side of the electric fuel pump. Once the fuel pressure of the fuel pump is too high, the safety valve will open and the high-pressure fuel will flow back to the fuel tank.