Fuel supply device and saddle type vehicle
View Patent ↗A fuel supply device is provided with a fuel pump and a filter. The fuel pump supplies fuel from a fuel tank to an engine. The filter is disposed upstream from the fuel pump in a fuel supply channel. The filter includes a first filter portion and a second filter portion. The first filter portion and the second filter portion filter the fuel. The second filter portion is disposed above the first filter portion when the filter is disposed inside the fuel tank. A density of gaps in the second filter portion is larger than a density of gaps in the first filter portion.
1. A fuel supply device for supplying fuel stored in a fuel tank to an engine, a main frame attached to the fuel tank and supporting the engine, an upper frame of the main frame being disposed within a recessed portion of the fuel tank, the fuel supply device comprising:
a fuel pump that supplies the fuel from the fuel tank to the engine; and
a filter that is disposed upstream from the fuel pump in a fuel supply channel;
wherein the filter includes a first filter portion that filters the fuel, and a second filter portion that filters the fuel;
wherein the second filter portion is disposed above both of the first filter portion and the recessed portion when the filter is disposed inside the fuel tank; and
wherein a density of gaps in the second filter portion is larger than a density of gaps in the first filter portion so that the gaps in the second filter portion have a size at which vapor from the fuel pump is discharged through the gaps of the second filter portion.
2. The fuel supply device according to claim 1 , wherein the second filter portion is disposed at the topmost position in the filter among sections for filtering the fuel with the filter disposed inside the fuel tank.
3. The fuel supply device according to claim 1 , wherein a longitudinal direction of the filter coincides with a vertical direction with the filter disposed inside the fuel tank.
4. The fuel supply device according to claim 1 , wherein with the filter disposed inside the fuel tank, the length of the first filter portion in the vertical direction is more than the length of the second filter portion in the vertical direction.
5. The fuel supply device according to claim 1 , wherein:
the first filter portion and the second filter portion are each formed from a mesh; and
the mesh of the second filter portion is coarser than the mesh of the first filter portion.
6. The fuel supply device according to claim 1 , wherein the filter has a cylindrical shape.
7. The fuel supply device according to claim 1 , wherein:
the fuel pump includes an intake port for fuel; and
the filter is disposed so as to extend upward from the intake port with the filter disposed inside the fuel tank.
8. The fuel supply device according to claim 1 , wherein the filter is fixed to the fuel pump.
9. A saddle type vehicle comprising:
a fuel tank having a recessed portion;
an engine;
a main frame supporting the engine and attached to the fuel tank, an upper frame of the main frame being disposed in the recessed portion, and
a fuel supply device, the fuel supply device including:
a fuel pump that supplies fuel from the fuel tank to the engine; and
a filter that is disposed upstream from the fuel pump in a fuel supply channel;
wherein the filter includes a first filter portion that filters the fuel, and a second filter portion that filters the fuel;
wherein the second filter portion is disposed above both of the first filter portion and the recessed portion when the filter is disposed inside the fuel tank; and
wherein a density of gaps in the second filter portion is larger than a density of gaps in the first filter portion so that the gaps in the second filter portion have a size at which vapor from the fuel pump is discharged through the gaps of the second filter portion.
10. The saddle type vehicle according to claim 9 , wherein the fuel pump is disposed below the fuel tank.
11. The saddle type vehicle according to claim 10 , wherein:
a bottom portion of the fuel tank includes an outflow port for fuel; and
the fuel pump is attached to the outflow port of the fuel tank.
12. The saddle type vehicle according to claim 10 , further comprising:
a fuel pipe connecting the fuel tank and the fuel pump,
wherein a bottom portion of the fuel tank includes an outflow port for fuel;
wherein the fuel pipe is attached to the outflow port of the fuel tank.
13. The saddle type vehicle according to claim 9 , wherein the fuel pump is disposed above the engine.
14. The saddle type vehicle according to claim 9 , wherein the second filter portion is stacked on the first filter portion in the vertical direction.
15. The saddle type vehicle according to claim 9 , wherein the second filter portion is disposed completely above the first filter portion in the vertical direction.
16. The fuel supply device according to claim 1 , wherein the second filter portion is stacked on the first filter portion in the vertical direction.
17. The fuel supply device according to claim 1 , wherein the second filter portion is disposed completely above the first filter portion in the vertical direction.
18. The saddle type vehicle according to claim 9 , wherein the second filter portion is disposed above the upper frame when the filter is disposed inside the fuel tank.
19. The saddle type vehicle according to claim 9 , wherein the first filter portion is located below a top surface of the recessed portion.
20. The fuel supply device according to claim 1 , wherein
the second filter portion is disposed above the upper frame when the filter is disposed inside the fuel tank, and
the first filter portion is located below a top surface of the recessed portion.