What are the symptoms of car fuel pump damage?

   If the fuel pump is broken, it will directly cause the vehicle to be unable to drive, work poorly, and cause the vehicle to accelerate and pant. There is no warning when there is a failure, and no fire can be started, and there is no residual pressure, which causes difficulty in starting. Centrifugal pump impeller wear: the oil supply pressure is reduced, and the acceleration is weak. Carbon brush wear: The fuel pump stops rotating and cannot be started. These are the symptoms before the fuel pump breaks down.

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   some performance after fuel pump damage:


  1. When the pump core is damaged, when the fuel supply system is working, when the key door is opened at this time, there is no sound of fuel pump running;


  2. When the pump body is damaged, due to the pressure relief, the fuel pressure cannot reach the specified fuel pressure value, it cannot be atomized well, and the engine cannot be started.


  3. Don't wait until the gasoline light alarms and stop refueling, because the fuel pump relies on gasoline to conduct heat and cool. When the gasoline liquid level is too low, it will not have the effect of cooling and heat dissipation and reduce the service life.


  Electric fuel pump may cause problems such as difficulty in starting, unstable idling, poor acceleration, weak driving, stop-and-go, etc. due to some reasons. These reasons are:

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   1. The influence of thermal air resistance;


  2. Reduced pump oil volume caused by dirty blockage. For example, if the gasoline tank is cleaned irregularly, the filter screen at the oil pump inlet is blocked. After cleaning the oil pump and filter screen, the pump oil volume cannot return to normal;


  3. The decline or failure of pump oil is mostly caused by dirty oil filter or reverse connection. Sometimes the heat load is increased due to delayed refueling;


  4. Carbon brushes, springs, commutator segments, and windings generate heat, which will cause increased wear and resistance;


  5. The speed of the oil pump decreases, and the oil pressure and oil volume decrease, causing the oil pump to fail.


   There are two main categories of electric fuel pump: roller type electric fuel pump and flat blade type electric fuel pump. Electric fuel pump is an important part of the electronic gasoline injection system of automobile engines.


   Its basic function is to provide fuel with a certain pressure to the engine fuel injection system.


   Therefore, from this point of view, the quality of the dfsk glory 560 electric fuel pump and the working conditions will directly affect the working conditions of the fuel injection system of the vehicle, and also greatly affect the fuel injection quality, the power performance and fuel economy of the vehicle. performance.

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   has a huge impact on the performance of the entire car.


  The electric fuel pump of the electronically controlled fuel injection system is a small oil pump driven by a miniature DC motor. Usually the motor and the oil pump are integrated and sealed in the pump casing.


   For most cars, the electric fuel pump is usually placed in the fuel tank.


  The roller-type electric fuel pump is named after its cylindrical shape. Its oil inlet and outlet are respectively arranged at both ends of the shell.


  The dfsk glory 360 roller oil pump is installed on the side of the oil inlet and is driven by a DC motor. The outlet of the oil pump is usually provided with a one-way valve and a buffer.


  The basic function of the one-way valve is to prevent the fuel from flowing back to the fuel tank when the motor stops running and the fuel pump is not working. At the same time, this one-way valve also has a certain pressure-keeping effect;


  The buffer is mainly used to reduce the pulsating noise of the oil pressure at the oil outlet. The maximum oil pressure of this electric fuel pump can reach 400kpa. When the oil pressure is too high, the pressure limiting valve will be opened, so that the fuel will return to the side of the oil inlet, which can effectively protect the fuel pump from damage .


  The shortcomings of this kind of electric fuel pump are its high working noise, unstable common pressure, and serious wear and tear.


The flat-blade electric fuel pump is basically the same as the roller-type electric fuel pump. The difference is that its rotor is not a cylindrical but a circular flat plate, and a number of small grooves are opened on the edge of the flat plate to form uniformly distributed blades. .


  The maximum pump oil pressure of this electric fuel pump can reach 600kpa, the oil pressure pulsation is small, the noise can be greatly reduced, the wear is also very low, the service life is relatively long, and the use is more common.