Working Principle And Introduction Of Electric Fuel Pump For Automobile Engine topic posted in Car Electronics Forum

Discussion in 'Car Electronics' started by qiangasgoo, Mar 30, 2017.

  1. qiangasgoo
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    Fuel pump assembly The role of the fuel pump is stored in the fuel tank fuel to the fuel injector fuel pipeline. Early engine fuel systems in the fuel pump mostly mechanical, and now electric fuel pump has been replaced Please login to see links and more information.. In addition, some of the original installed in the fuel tank outside the electric fuel pump, taking into account the heat, noise and air resistance and other issues, are also built into the fuel tank.

    Fuel pump assembly

    The purpose of the fuel pump is to store the fuel stored in the fuel tank Please login to see links and more information. to the fuel line of the injector. Early engine fuel systems in the fuel pump mostly mechanical, and now electric fuel pump has been replaced. In addition, some of the original installed in the fuel tank outside the electric fuel pump, taking into account the heat, noise and air resistance and other issues, are also built into the fuel tank. The fuel pump is installed in the tank and is combined with the fuel oil meter measuring device as a whole.

    Fuel pump on the fuel gauge paddle metering part

    The working principle of the electric fuel pump is the same as that of the electric water pump, and the corresponding oil pump device is driven by the motor, so as to continuously feed the fuel oil to the fuel system. To know that the fuel system must maintain a certain pressure, the only way to ensure that the fuel injection device fuel spray better, more easy to burn. But when the engine is turned off, the fuel system pressure will be lost, once there is no residual pressure, at high temperatures in the pipeline is easy to produce air resistance. So that when the engine restarts, because the fuel system into the air, it is difficult to ensure adequate fuel, the engine will be difficult to start. For this purpose, a check valve is provided in the fuel pump. So that when the fuel pump stops running, the check valve is closed to maintain the residual pressure in the fuel line to facilitate the restart of the engine. In addition, I do not know if you have noticed, when your vehicle after a long time parked, if the car is relatively quiet, when you open the ignition switch in no hurry to start the engine, you will hear the rear of the vehicle came "buzzing" sound. This is not a malfunction, but in order to ensure that the fuel system has enough pressure to start the engine, let the electric fuel pump run in advance 2-3 seconds to build oil. In order to prevent the electric fuel pump out of the port side of the pressure is too high, but also designed a safety valve, so that once the fuel pump fuel pressure is too high, Please login to see links and more information. will open, so that the pressure of high fuel back to the fuel tank.

    Fuel pump and engine control computer module

    We mentioned the saddle-shaped fuel tank on some rear-drive cars and SUVs, which are divided into main tanks and fuel tanks, but generally only an electric fuel pump is installed in the main tank. So how does the fuel in the tank compare to the main fuel tank? Engineers use the siphon principle, so that the fuel tank in the fuel tank through the suction pipe is sucked out and transported to the main fuel tank.


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