JP2004316632A - Fuel feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel feeder in which a sub tank is easily installed inside a fuel tank without increasing the size of an opening part of the fuel tank. <P>SOLUTION: Since a sub tank 30 has a corner part 37, an introduction part 51 and a fuel tank 11 are not interfered with each other when a fuel feeder 10 is stored inside the fuel tank 11 even if the introduction part 51 or the like is protruded outwardly in the radial direction from the sub tank 30. Since interference of the introduction part 51 with the fuel tank 11 is prevented, an opening part 12 need not be expanded to meet the introduction part 51 protruded from the sub tank 30. Therefore, the sub tank 30 can be easily and smoothly installed inside the fuel tank 11 without increasing the size of the opening part 12. In addition, degradation of strength of the fuel tank 11 is suppressed as the size of the opening part 12 is increased, and the seal length of the opening part 12 is reduced. Therefore, liquid-tightness and airtightness are enhanced, and leakage of fuel or fuel vapor is prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fuel supply device that supplies fuel to an engine.

  A fuel supply device that sucks and discharges fuel in a sub-tank by a fuel pump housed in the sub-tank even when the fuel in the fuel tank is reduced by supplying the fuel in the fuel tank into the sub-tank has been known. (See Patent Document 1). Further, there is known a fuel supply device in which a plurality of components are housed in a shell and mounted in a fuel tank through one hole (see Patent Document 2).

JP 2000-297713 A JP 2000-330416 A

  However, in the case of the fuel supply device disclosed in Patent Literature 1, the sub-tank may have a protruding portion that protrudes radially outward, such as an introduction portion of a jet pump. In this case, when the sub-tank is installed inside the fuel tank, the protruding portion easily interferes with the fuel tank having the opening. Further, even in a fuel supply device as disclosed in Patent Document 2, a similar problem occurs when the shell has a protruding portion. If the protrusion and the fuel tank interfere with each other, it becomes difficult to install the sub-tank inside the fuel tank, resulting in an increase in man-hours. On the other hand, in order to prevent interference between the protrusion and the fuel tank, it is conceivable to enlarge the opening of the fuel tank in accordance with the protrusion of the sub tank. However, if the opening of the fuel tank is enlarged, the strength of the fuel tank is reduced, and the entire length of the seal between the fuel tank and the fuel supply device is increased. Therefore, there is a problem that leakage of fuel or fuel vaporized inside the fuel tank is likely to occur.

  Therefore, an object of the present invention is to provide a fuel supply device in which a sub-tank can be easily installed inside a fuel tank without increasing the size of the opening of the fuel tank.

  According to the first aspect of the invention, the sub-tank has a corner on the side opposite to the protrusion in the radial direction. The corner is recessed radially inward of the sub tank. Therefore, the sub tank is easily inserted into the opening by the corner formed on the radially opposite side of the protrusion. That is, when storing the sub-tank inside the fuel tank, first, the protrusion of the sub-tank is inclined toward the opening, and the protrusion is inserted into the fuel tank from the opening. Then, the corner of the sub tank is inserted into the fuel tank while the inclination of the sub tank is being returned. At this time, by forming a corner in the sub tank, the sub tank and the opening of the fuel tank do not interfere with each other. Therefore, the sub-tank can be easily and smoothly installed inside the fuel tank without increasing the size of the opening. Further, since the size of the opening is not increased, a decrease in the strength of the fuel tank can be prevented. Furthermore, the extension of the seal length due to the enlargement of the opening does not occur. Therefore, it is possible to easily prevent the fuel or the fuel vapor from flowing out of the fuel tank.

According to the second aspect of the present invention, the corner is formed in a curved shape. Therefore, the interference between the curved corner and the opening is reduced by rotating the sub-tank after inserting the protrusion into the fuel tank. Therefore, the sub-tank can be easily installed inside the fuel tank.
According to the third aspect of the present invention, the projecting portion is an introduction portion of the jet pump. The introduction portion projects radially outward from the sub tank. Therefore, even when the introduction part of the jet pump is installed in the sub tank, the sub tank can be easily installed inside the fuel tank.

According to the fourth aspect of the present invention, the jet pump is housed in the sub-chamber section divided by the partition from the main chamber section of the sub-tank in which the fuel pump is housed. For example, even when the fuel in the sub-chamber flows back to the fuel tank and the fuel in the sub-chamber is emptied while the engine is stopped, the main chamber and the sub-chamber are separated from each other. Does not flow back into the fuel tank. Therefore, even when the engine is stopped, the main chamber is filled with fuel. Therefore, when the engine is started, the fuel pump can suck the fuel in the main chamber and quickly discharge it.
In the invention described in claim 5, the protruding portions are the arm portion and the float portion of the detecting means. The arm and the float protrude radially outward from the sub tank. Therefore, even when the arm portion and the float portion of the detection means are installed in the sub tank, the sub tank can be easily installed inside the fuel tank.

In the invention according to claim 6, the sub-tank has a support portion of the sub-tank for supporting the support member. The support portion is provided integrally with, for example, a lid member that closes a side portion of the sub tank or a side opposite to the bottom of the sub tank. Therefore, the sub-tank can reciprocate in the axial direction of the lid member with respect to the lid member closing the opening. For example, by pressing the sub-tank against the bottom of the fuel tank while the sub-tank and the lid member are supported by the support member, the position of the sub-tank is adjusted according to the remaining amount of fuel inside the fuel tank. Therefore, fuel can be discharged to the outside of the fuel tank regardless of the remaining amount of fuel inside the fuel tank.
In the invention according to claim 7, the support portion is installed radially inward of the side portion of the sub tank. Therefore, the support portion and the support member do not protrude outward in the radial direction of the sub tank. Thus, even when the support member supports the sub tank and the lid member, the projected area of the sub tank does not change. As a result, there is no need to increase the size of the opening.

In the invention described in claim 8, the support member is provided in the notch of the sub tank. The notch is recessed radially inward from the side of the sub tank. Therefore, the support portion does not protrude outward in the radial direction of the sub tank. Thus, even when the support member supports the sub tank and the lid member, the projected area of the sub tank does not change. As a result, there is no need to increase the size of the opening.
According to the ninth aspect of the present invention, the end of the notch opposite to the lid member opens radially outward of the bottom. In the case where the support portion is installed on the radially inner side of the sub-tank, if the corner portion is formed in the sub-tank, the end portion of the support member on the side opposite to the lid member and the corner portion of the sub-tank are easily contacted. Therefore, the movement of the support member is restricted, and the relative movement distance between the lid member and the sub tank is reduced. In view of this, in the invention according to claim 9, the support portion is provided in the notch recessed inward in the radial direction of the sub tank, and the end of the notch on the side opposite to the lid member opens radially outward of the bottom. Thus, even when a corner is formed in the sub tank, the end of the support member on the side opposite to the lid member does not contact the corner of the sub tank. Therefore, the moving distance between the lid member and the sub tank can be sufficiently ensured.

(1st Embodiment)
FIG. 1 shows a fuel supply device according to a first embodiment of the present invention.
The fuel supply device 10 includes a flange 20 as a cover member, a sub tank 30, a pump module (not shown), a pressure regulator, a suction filter, and the like. The flange 20 covers the opening 12 formed in the upper wall of the fuel tank 11. The sub tank 30 is housed in the fuel tank 11. The fuel tank 11 is formed in a saddle shape having a concave portion that avoids a drive shaft (not shown). The fuel tank 11 has one tank section that houses the sub tank 30 and the other tank section where fuel is transferred to the sub tank 30 by the transfer jet pump 50.

  The flange 20 has a disk shape and has press-fit portions 21 at both ends in the radial direction. One end of a shaft 22 as a support member is press-fitted into the press-fit portion 21. The other end of the shaft 22 is loosely inserted into a support portion 31 formed in the sub tank 30 as shown in FIG. The sub-tank 30 is formed in a substantially cylindrical shape having a bottom portion 32 and a side portion 33. The support portion 31 is formed in a cutout portion 34 concaved in an arc shape radially inward from the side portion 33 of the sub tank 30. By providing the support portion 31 in the cutout portion 34 of the sub tank 30, the support portion 31 and the shaft 22 inserted into the support portion 31 do not protrude radially outward from the sub tank 30.

  The cutout portion 34 is formed so as to be recessed radially inward at a part of the side portion 33 of the sub tank 30 in the circumferential direction. The notch 34 extends in the axial direction of the sub tank 30. In the case of the first embodiment, the cutouts 34 are provided at approximately one position at both ends in the radial direction of the sub tank 30. The sub-tank 30 has a support portion 31 in a cutout portion 34 that is recessed radially inward. The support portion 31 is formed in a cylindrical shape, and has a hole 35 on the inner peripheral side. The hole 35 has an inner diameter slightly larger than the outer diameter of the shaft 22. Thereby, the support part 31 supports the shaft 22 so that it can reciprocate.

As shown in FIG. 1, the spring 23 has one end in contact with the flange 20 and the other end in contact with the sub-tank 30, and applies a load in a direction in which the flange 20 and the sub-tank 30 are separated from each other. Thus, even if the fuel tank 11 containing the fuel supply device 10 expands or contracts due to a change in internal pressure due to a change in temperature or a change in the amount of fuel, the bottom 32 of the sub-tank 30 is pressed by the spring 23. Always pressed to.
The inside of the sub tank 30 is divided into a main chamber 41 and a sub chamber 42 by a partition 36. The main chamber 41 houses a pump module, a pressure regulator, and a suction filter (not shown). A transfer jet pump 50 is housed in the sub chamber 42. The introduction part 51 as a protruding part protrudes radially outward from the side part 33 of the sub tank 30 forming the sub chamber part 42 together with the partition wall 36. The introduction section 51 communicates with the sub-chamber section 42. A fuel transfer pipe (not shown) is attached to the introduction section 51. The end of the fuel transfer pipe on the side opposite to the introduction portion extends to the other tank portion of the fuel tank 11.

  As shown in FIG. 2, the suction jet pump 60 is mounted outside the sub tank 30. The suction jet pump 60 supplies fuel from the inside of one tank portion of the fuel tank 11 in which the fuel supply device 10 is installed to the inside of the sub tank 30. The fuel extracted from the middle of the pressure increasing section through which the fuel pressurized by the fuel pump (not shown) flows is supplied to the suction jet pump 60. The fuel supplied to the suction jet pump 60 is injected toward a suction port 61 formed in the sub tank 30. By injecting high-pressure fuel from the suction jet pump 60 toward the suction port 61, suction pressure is generated on the suction port 61 side of the sub tank 30. Thereby, the fuel in one tank portion of the fuel tank 11 is sucked into the main chamber portion 41 of the sub tank 30. As a result, even if the liquid level of the fuel in one tank portion of the fuel tank 11 decreases, the inside of the main chamber portion 41 of the sub tank 30 is filled with the fuel. In addition, the surplus fuel discharged from the pressure regulator or the surplus fuel returned from the engine side is supplied to the suction jet pump 60, and the surplus fuel is ejected from the suction jet pump 60 toward the suction port 61. good.

  The transfer jet pump 50 is mounted in the sub-chamber 42. The transfer jet pump 50 transfers fuel from another tank portion of the fuel tank 11 to the sub-chamber portion 42 of the sub-tank 30. The fuel taken out of the booster of the fuel pump (not shown) is supplied to the transfer jet pump 50. By injecting the supplied fuel from the transfer jet pump 50, the fuel in the other tank portion of the fuel tank 11 is sucked into the sub chamber portion 42 of the sub tank 30 via the introduction portion 51. When the fuel sucked into the sub-chamber 42 is filled in the sub-chamber 42, the fuel in the sub-chamber 42 gets over the partition 36 and overflows into the main chamber 41. Thereby, the main chamber 41 is filled with the fuel overflowing from the sub chamber 42.

  The sub-tank 30 has a corner portion 37 that is recessed radially inward on the bottom portion 32 side of the side portion 33. The corner portion 37 is formed on the opposite side in the radial direction of the introduction portion 51 protruding from the sub tank 30. The corner 37 is formed over about half a circumference in the circumferential direction of the sub tank 30. The corner 37 is formed in a curved shape. When cut at a plane including the central axis of the sub-tank 30 as shown in FIG. 1, the corner 37 has, for example, a quadratic curve, a cubic or higher-order multi-dimensional curve, an arc-shaped curve, an elliptic curve, an exponential curve, or a trochoid. The shape may be an arbitrary curve such as a curve. In the case of the first embodiment, the center or the focal point of the curved surface of the corner 37 is located inside the sub tank 30. Therefore, in the case of the first embodiment, the corner portion 37 is formed into a curved surface bulging outward in the radial direction of the sub tank 30.

Next, a method for installing the above-described fuel supply device 10 in the fuel tank 11 will be described.
The sub-tank 30 integrated with the flange 20 by the shaft 22 is installed inside the fuel tank 11 through the opening 12 formed in the upper wall of the fuel tank 11. The opening 12 of the fuel tank 11 has an inner diameter smaller than the outer diameter of the flange 20. The outer diameter of the sub-tank 30 is slightly smaller than the inner diameter of the opening 12. Therefore, although the sub tank 30 passes through the opening 12, the flange 20 does not pass through the opening 12.

  When the sub-tank 30 is installed inside the fuel tank 11, the fuel supply device 10 is first inclined as shown in FIG. When the introduction portion 51 is inserted into the opening 12, the sub tank 30 of the fuel supply device 10 is inserted into the fuel tank 11 from the opening 12 as shown in FIG. Then, the fuel supply device 10 is rotated while the corner 37 of the sub tank 30 is inserted into the fuel tank 11 while returning the inclination of the fuel supply device 10. Thereby, the flange 20 is located upward, and the sub tank 30 is located downward. At this time, since the sub-tank 30 has the corner 37, even when the fuel supply device 10 is rotated, the corner 37 of the sub-tank 30 does not contact the inner peripheral wall 11a of the fuel tank 11 forming the opening 12. Therefore, the sub tank 30 is housed inside the fuel tank 11 without interference between the sub tank 30 and the fuel tank 11. When the sub tank 30 is accommodated in the fuel tank 11, the opening 12 is closed by the flange 20, as shown in FIG. The fixing of the fuel supply device 10 is completed by fixing the flange 20 to the fuel tank 11.

  In the first embodiment of the present invention, the corner 37 is formed in the sub tank 30. Accordingly, even when the introduction part 51 and the like project radially outward from the sub tank 30, the introduction part 51 and the fuel tank 11 do not interfere with each other when the fuel supply device 10 is accommodated inside the fuel tank 11. In addition, since interference between the introduction portion 51 and the fuel tank 11 is prevented, it is not necessary to enlarge the opening 12 in accordance with the introduction portion 51 protruding from the sub tank 30. Therefore, the sub tank 30 can be easily and smoothly installed inside the fuel tank 11 without increasing the size of the opening 12. Further, since the size of the opening 12 is not increased, a decrease in the strength of the fuel tank 11 is prevented. Further, as the size of the opening 12 increases, the seal length does not increase. Therefore, liquid tightness and air tightness can be improved, and leakage of fuel or fuel vapor to the outside of the fuel tank 11 can be easily prevented.

In the first embodiment of the present invention, the installation of the fuel supply device 10 in the fuel tank 11 is performed by a simple process of inserting the introduction portion 51, rotating the fuel supply device 10, and fixing the flange 20. Therefore, the number of steps for installing the fuel tank 11 in the fuel supply device 10 can be reduced.
In the first embodiment of the present invention, the inside of the sub-tank 30 is partitioned into a main chamber 41 and a sub-chamber 42 by a partition 36. Therefore, even when the fuel stored in the sub-chamber 42 flows back to the fuel tank 11 by stopping the engine and the sub-chamber 42 is emptied, the fuel stored in the main chamber 41 remains in the fuel tank. No backflow to 11. Thus, the main chamber 41 is filled with the fuel even when the engine is stopped. Therefore, when the engine is started, the fuel pump can suck the fuel in the main chamber portion 41 and quickly discharge the fuel.
Further, in the first embodiment of the present invention, the shaft 22 is supported by the support portion 31 of the sub tank 30. The support portion 31 is provided in a cutout portion 34 that is recessed radially inward from the side portion 33 of the sub tank 30. Therefore, the support portion 31 and the shaft 22 supported by the support portion 31 do not project outward in the radial direction of the sub tank 30. Therefore, the projected area of the sub tank 30 is reduced, and there is no need to enlarge the opening 12 for inserting the sub tank 30.

(Second and third embodiments)
FIGS. 4 and 5 show a second embodiment and a third embodiment according to the present invention, respectively. Note that the same reference numerals are given to substantially the same portions as those in the first embodiment, and description thereof will be omitted.
In the second embodiment shown in FIG. 4, the shape of the corner 71 of the sub tank 70 is different from that of the first embodiment. In the second embodiment, the corner 71 is formed in a curved surface, but the center or the focal point of the curved surface is located outside the sub tank 70. Therefore, the corner 71 is formed in a curved shape depressed inward in the radial direction of the sub tank 30.
In the second embodiment, the corner 71 of the sub-tank 70 is recessed more inward in the radial direction than in the first embodiment. Therefore, even when the amount of protrusion of the member protruding from the sub tank 70 such as the introduction portion 51 is large, interference between the sub tank 70 and the fuel tank 11 is prevented. Therefore, the sub-tank 70 can be easily and smoothly installed inside the fuel tank 11 without increasing the size of the opening 12.

In the third embodiment shown in FIG. 5, the shape of the corner 73 of the sub tank 72 is different from that of the first embodiment. In the third embodiment, when the corner 73 is cut along a plane including the central axis of the sub tank 72, the cross section is formed in a stepped shape connecting a plurality of planes. In the case of the third embodiment, the corner 73 is formed in a stepped shape recessed radially inward of the sub tank 72.
In the third embodiment, a part of the corner 73 of the sub tank 72 is recessed more radially inward than in the first embodiment. Therefore, even when the amount of protrusion of the member protruding from the sub tank 72 such as the introduction portion 51 is large, interference between the sub tank 72 and the fuel tank 11 is prevented. Therefore, the sub tank 72 can be easily and smoothly installed inside the fuel tank 11 without increasing the size of the opening 12.

(Fourth embodiment)
FIG. 6 shows a fuel supply device according to a fourth embodiment of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the fourth embodiment, as shown in FIG. 6, the fuel supply device 10 includes a sender gauge 80 as a detecting unit. The sender gauge 80 detects the remaining amount of fuel inside the fuel tank 11. The sender gauge 80 has a pattern section 81, a support section 82, an arm section 83, and a float section 84. The pattern portion 81 is provided on a planar step portion 38 formed on a part of the sub tank 30 in the circumferential direction. The pattern section 81 has a circuit pattern in which a plurality of electric resistances having different resistance values are formed. The support section 82 supports one end of the arm section 83 and is rotatable with the arm section 83 relative to the pattern section 81. A contact portion (not shown) is provided on the support portion 82, and the contact portion contacts the circuit pattern of the pattern portion 81. At the other end of the arm 83, a float 84 is provided. The float 84 floats on the fuel stored in the fuel tank 11.

The float 84 floating in the fuel moves up and down inside the fuel tank 11 according to the level of the fuel stored in the fuel tank 11. Since the arm portion 83 that supports the float portion 84 is rotatably supported by the support portion 82, the support portion 82 rotates in the forward or reverse direction with the up and down of the float portion 84. Thereby, the contact state between the contact portion of the support portion 82 and the circuit pattern of the pattern portion 81 changes. As a result, the resistance value detected by the pattern portion 81 changes, and the liquid level position of the fuel inside the fuel tank 11 is detected based on the detected resistance value.
The arm portion 83 and the float portion 84 of the sender gauge 80 project radially outward of the sub tank 30 as shown in FIG. That is, in the fourth embodiment, the arm portion 83 and the float portion 84 constitute a projecting portion projecting from the sub tank 30.

  When the fuel supply device 10 according to the fourth embodiment is installed in the fuel tank 11, first, the fuel supply device 10 is tilted, and the arm portion 83 and the float portion 84 of the sender gauge 80 projecting from the sub tank 30 are inserted into the opening 12. When the arm 83 and the float 84 are inserted into the opening 12, the sub tank 30 of the fuel supply device 10 is inserted into the fuel tank 11 from the opening 12. Then, the fuel supply device 10 is rotated while the corner 37 of the sub tank 30 is inserted into the fuel tank 11 while returning the inclination of the fuel supply device 10. As a result, the flange 20 is located above the opening 12 and the sub tank 30 is located below. At this time, since the sub-tank 30 has the corner 37, even if the fuel supply device 10 is rotated, the position corresponding to the corner 37 of the sub-tank 30 is located on the inner peripheral wall of the fuel tank 11 forming the opening 12. Do not touch. Therefore, the sub tank 30 is housed inside the fuel tank 11 without interference between the sub tank 30 and the fuel tank 11. When the sub-tank 30 is housed in the fuel tank 11, the opening 12 is closed by the flange 20. The fixing of the fuel supply device 10 is completed by fixing the flange 20 to the fuel tank 11.

  In the fourth embodiment, at least one of the notches 34 of the sub tank 30 is arranged at a position corresponding to the corner 37. The notch 34 arranged at a position corresponding to the corner 37 has an end on the side opposite to the flange opening radially outward from the corner 37. Thus, when the shaft 22 is inserted into the support portion 31 formed in the cutout portion 34, the end 22 a of the shaft 22 on the side opposite to the flange is located radially outside the bottom portion 32, that is, radially outside the corner portion 37. . The notch 34 is formed so as to be recessed inward in the radial direction of the sub-tank 30, and both ends in the axial direction are open. Therefore, the end 22 a on the opposite side of the flange of the shaft 22 inserted into the support portion 31 can freely move radially outside the corner 37. That is, the end 22 a on the side opposite to the flange of the shaft 22 is freely movable without interference with the sub-tank 30 that is recessed inward in the radial direction by forming the corner 37.

When the corner 37 of the sub-tank 30 is recessed inward in the radial direction, the end 22a of the shaft 22 supported by the support portion 31 on the opposite flange side must be opened unless the end of the notch 34 on the opposite flange side is opened. The corner 37 contacts the inner wall of the sub tank 30. As a result, the movement of the shaft 22 is restricted, and the distance between the flange 20 and the sub tank 30 cannot be made smaller than a certain value.
On the other hand, in the fourth embodiment, since the end of the notch 34 on the side opposite to the flange is opened, the end 22 a of the shaft 22 on the side opposite to the flange 22 passes through the radial outside of the corner 37 and is connected to the sub-tank. It is exposed to the outside in the radial direction of the bottom 32 of 30. Thus, the shaft 22 can freely move until the end 22 a on the side opposite to the flange contacts the bottom of the fuel tank 11. Thus, the distance between the flange 20 and the sub tank 30 is reduced, and the minimum height of the fuel supply device 10 is reduced.

  In the fourth embodiment of the present invention, the corner 37 is formed in the sub tank 30. Accordingly, even when the arm 83 and the float 84 of the sender gauge 80 project radially outward from the sub tank 30, the arm 83 and the float 84 and the fuel 84 are connected when the fuel supply device 10 is accommodated in the fuel tank 11. There is no interference with the tank 11. Further, it is not necessary to enlarge the opening 12 in accordance with the arm 83 and the float 84 projecting from the sub tank 30. Therefore, the sub-tank 30 can be easily and smoothly installed inside the fuel tank 11 without increasing the size of the opening 12.

  In the fourth embodiment, the end of the notch 34 on the side opposite to the flange is open. Therefore, the shaft 22 supported by the support portion 31 moves until the end 22 a on the side opposite to the flange contacts the bottom of the fuel tank 11. Thus, the distance between the flange 20 and the sub tank 30 can be reduced. As a result, the minimum height of the fuel supply device 10 is reduced, and the height of the fuel tank 11 is reduced. Therefore, it is possible to reduce the size of the fuel supply device 10 and the installation space for the fuel tank 11.

(Other embodiments)
In the above-described plurality of embodiments, for example, as in the first embodiment illustrated in FIG. 2, an example has been described in which the cutout portion 34 is formed in the side portion 33 of the sub tank 30 and the support portion 31 is installed in the cutout portion 34. However, as another embodiment, the sub-tank is formed of a bottomed cylindrical sub-tank main body having a side portion and a bottom portion, and a lid member for closing an opening on the flange side of the sub-tank main body, and a support portion is provided on the lid member. May be installed. In this case, the support portion installed on the lid member extends from the side opposite to the flange of the lid member toward the bottom of the sub tank main body. Further, the support portion extending from the lid member may be inserted into a notch formed in the sub tank main body. This prevents the end of the shaft from coming into contact with the corner as in the fourth embodiment.

  The plurality of embodiments described above have been individually described for each embodiment. However, a plurality of embodiments may be combined and applied to the fuel supply device of the present invention. In the embodiments of the present invention, two shafts are arranged at both ends in the radial direction of the flange. However, two or more shafts may be arranged at equal or unequal intervals in the circumferential direction, and may be arranged not only at both ends in the radial direction but also adjacent to each other in the circumferential direction. Further, in the plurality of embodiments, the case where the corner is formed in a curved surface or a step shape has been described, but the corner may be formed in a plane such as an inclined surface, and the shape of the corner is arbitrarily selected. can do.

It is the schematic which looked at the fuel supply device by a 1st embodiment of the present invention from the side. It is the schematic which looked at the fuel supply device by a 1st embodiment of the present invention from the flange side. It is a schematic diagram showing a process of installing a fuel supply device by a 1st embodiment of the present invention in a fuel tank. It is the schematic which looked at the fuel supply device by 2nd Embodiment of this invention from the side. It is the schematic which looked at the fuel supply device by a 3rd embodiment of the present invention from the side. It is the schematic which looked at the fuel supply device by a 4th embodiment of the present invention from the side. It is the schematic which looked at the fuel supply device by a 4th embodiment of the present invention from the flange side.

Explanation of reference numerals

  Reference Signs List 10 fuel supply device, 11 fuel tank, 12 opening, 20 flange (lid member), 22 shaft (supporting member), 30, 70, 72 subtank, 31 support, 32 bottom, 33 side, 34 cutout, 36 Partition wall, 37, 71, 73 corner, 41 main chamber, 42 sub chamber, 50 transfer jet pump, 51 introduction part (projection part), 80 sender gauge (detection means), 82 support part, 83 arm part (projection) Part), 84 Float part (projection part)

Claims (9)

A fuel supply device installed inside the fuel tank from an opening of the fuel tank,
A sub-tank having a bottom and a side connected to the bottom, and housed inside the fuel tank;
A protrusion protruding radially outward from the side portion,
The fuel supply device according to claim 1, wherein the sub-tank has a corner in which the bottom side of the side portion is radially inwardly recessed on a side substantially radially opposite to the protruding portion.   The fuel supply device according to claim 1, wherein the corner is formed in a curved shape. A jet pump that is housed inside the sub-tank and supplies fuel to the inside of the sub-tank,
3. The fuel supply device according to claim 1, wherein the projecting portion is an introduction portion that introduces fuel from the fuel tank into the sub-tank by using fuel injected from the jet pump. 4.   4. The fuel supply device according to claim 3, wherein the sub-tank has a partition separating a main chamber in which a fuel pump is housed and a sub-chamber in which the jet pump is housed. The fuel tank includes a support portion installed on the side portion, an arm portion protruding radially outward of the sub tank from the support portion, and a float portion installed on a side opposite to the support portion of the arm portion. Detecting means for detecting the liquid level of the fuel,
The fuel supply device according to claim 1, wherein the projecting portions are the arm portion and the float portion. A lid member for closing the opening,
A support member that supports the sub tank and the lid member so as to be able to reciprocate in the axial direction of the sub tank,
The fuel supply device according to any one of claims 1 to 5, wherein the sub-tank has a support portion that supports the support member.   The fuel supply device according to claim 6, wherein the support portion is provided radially inward of the side portion of the sub tank.   The fuel supply device according to claim 7, wherein the sub-tank has a notch formed to be recessed radially inward of the side portion, and the support portion is provided in the notch.   The fuel supply device according to claim 8, wherein an end of the notch on the side opposite to the lid member opens radially outward of the bottom.

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