click:518 2023/4/20
EFI fuel pump fuel pump by the pump, permanent magnet motor and the shell composed of three parts .
The working principle is : the permanent magnet motor driven pump powered rotary fuel oil from the suction inlet , flows through the electric fuel pump inside , and from the oil port pushed out to the fuel supply system . EFI fuel pump casing at both ends of curling clench , so that all components of an assembly is not removable , so the electric fuel pump is generally not repaired. Additional functions performed by the fuel pump valve and the check valve is completed, the role of a safety valve to avoid blocking the fuel line , the pressure rise caused by excessive damage to the fuel pump or pipeline rupture phenomenon . The calibration pressure of the safety valve 2.6bar, the check valve is provided to prevent the fuel pump stops working when the seal passage , the fuel system to maintain a residual pressure , so that the next time the engine starting easy. Bottom electric fuel pump is mounted on the inside of the vehicle 's fuel tank , oil tank has a partial subsidence formed on the tank bottom shell . Suction from a pool of oil , the oil pipeline through the mouth after connecting with an external fuel tank cap when the pump piping work . The upper part of the pump by the fuel tank cap and fuel tank cap gasket, oil pump pressure in the tank tightly . There is oil in the oil pump , oil return standard gauge arrow , press the arrow to determine the link pipe . Link pump circuit : pump circuit has 5-way connector , 2 -way power for the pump , and the other 3-way as liquid display . Red power circuit is " +" pole, the pole should be connected to the EFI system wiring harness , relay controls the power supply controlled by the ECU . The fuel pump provides fuel flow 80L / h , excess oil recirculation flow into the fuel tank , the fuel injection nozzle and the cooling body wash during the cycle .
Electric fuel pump is good or bad judgment :. A former electric fuel pump damage , which significantly increases the noise than the normal time, by listening to the sound can be judged. b. detecting electric fuel pump armature winding resistance , the general resistance of about 10 ~ 20Ω, if the resistance is too large or too small , indicating that the electric fuel pump armature winding short circuit, poor contact or brush around the blocked road other faults. c Check the electric fuel pump oil volume : Remove the electric fuel pump outlet pipe , the electric fuel pump through the terminal voltage above 11.5V , dosage cup to collect fuel from the oil port within 30 seconds of fuel pump should be less than 0.6 liters , otherwise described as a safety valve is faulty pump .
Electric fuel pump is irreparable pieces , when it is determined damaged and must be replaced. When the electric fuel pump removal and installation of the required total power must be cut off . Computer-controlled fuel pump features: When the fuel pump is turned on , connected to the ignition switch Ⅱ file location , fuel pump start , if ECU receives engine speed signal within 10 seconds is less than the minimum starting speed or when the engine is stopped , the pump power is cut off , the long-term aim is to prevent the pump work , and when unforeseen circumstances cut off the oil . When the engine is running or starting power conditions , the pump power is turned on .
StructureFuel pump by an electric motor , pressure limiter , check valve structure, the electric fuel pump motor the actual work of the shell ,...
EFI fuel pump fuel pump by the pump, permanent magnet motor and the shell composed of three parts .The working principle is : the permanent mag...
Car fuel pump, rocker outside the gap is too big(1) including, packing gasket between the outer arm. Gaskets are available metal, copper, wire,...
EFI fuel pump to the delivery of high-pressure fuel pipe to ensure continuous supply of fuel to the injectors .Fuel pump and the engine running...
EFI fuel pump to meet the diverse requirements of customers in terms of product mix is very flexible and can handle a variety of substrates. In...
Automotive fuel pump seal precautions top nine points :1, the general mechanical seal for cleaning , without suspended granule media. Therefore...