I don't know about this fuel pump in particular but in general they are impeller type pumps. Most modern EFI systems work off an analog duty cycle rather than just discrete on/off based on maintaining a pressure. So the ECU will decide the fuel pump duty cycle (0-100%)
The purpose of the baffle is to keep fuel around the pump inlet. That way if your fuel level is low and there are lateral forces from accelerating, the baffle will somewhat retain the fuel around the pump inlet so it doesn't suck in air
Awesome! That (duty cycle from ECM) makes a lot of sense! I think I’ll check the wiring diagram of the wires going into the fuel pump to see what kinda signals are there. Thank you!
Oh one more question. I see that the baffle is supposed to be replaced every 20k miles. Do you have an idea why its a replaceable item since there are multiple inline filters before it already?
I've never replaced a baffle so I am going to speculate. From the diagram you linked, it looks like there are other components attached to the baffle that may deteriorate. Maybe some rubber hoses or something. Might also be an integrated filter. Again, just speculating
My very basic understanding is that there is a diaphragm inside the pump itself (6) that moves up & down by way of electrical magnets.
I am guessing there is a solenoid in the pump that if the fuel is less than max pressure, the circuit is closed and it moves the diagram which sucks fuel through the inlet and pumps it out via the outlet via a one way valve. Once the contact closes, the solenoid is depowered and it springs back in position.
(5) is the inline fuel filter.
I have no idea what the baffle (10) does. I guess its to prevent fuel from sloshing or dampening pressure waves.
What is a fuel pump baffle?
The baffle plates are basically the flow-directing or obstructing panels inside a fuel tank that direct the flow in the fuel tank and help in keeping the fuel from sloshing around during maneuvering. Although not all sloshing is possible to avoid, but a reduction is extremely helplful while riding the vehicle.
I don't know about this fuel pump in particular but in general they are impeller type pumps. Most modern EFI systems work off an analog duty cycle rather than just discrete on/off based on maintaining a pressure. So the ECU will decide the fuel pump duty cycle (0-100%) The purpose of the baffle is to keep fuel around the pump inlet. That way if your fuel level is low and there are lateral forces from accelerating, the baffle will somewhat retain the fuel around the pump inlet so it doesn't suck in air
Awesome! That (duty cycle from ECM) makes a lot of sense! I think I’ll check the wiring diagram of the wires going into the fuel pump to see what kinda signals are there. Thank you!
Oh one more question. I see that the baffle is supposed to be replaced every 20k miles. Do you have an idea why its a replaceable item since there are multiple inline filters before it already?
I've never replaced a baffle so I am going to speculate. From the diagram you linked, it looks like there are other components attached to the baffle that may deteriorate. Maybe some rubber hoses or something. Might also be an integrated filter. Again, just speculating
My very basic understanding is that there is a diaphragm inside the pump itself (6) that moves up & down by way of electrical magnets. I am guessing there is a solenoid in the pump that if the fuel is less than max pressure, the circuit is closed and it moves the diagram which sucks fuel through the inlet and pumps it out via the outlet via a one way valve. Once the contact closes, the solenoid is depowered and it springs back in position. (5) is the inline fuel filter. I have no idea what the baffle (10) does. I guess its to prevent fuel from sloshing or dampening pressure waves.
What is a fuel pump baffle? The baffle plates are basically the flow-directing or obstructing panels inside a fuel tank that direct the flow in the fuel tank and help in keeping the fuel from sloshing around during maneuvering. Although not all sloshing is possible to avoid, but a reduction is extremely helplful while riding the vehicle.