JP2004316567A - Fuel feed apparatus - Google Patents

Fuel feed apparatus Download PDF

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Publication number
JP2004316567A
JP2004316567A JP2003112660A JP2003112660A JP2004316567A JP 2004316567 A JP2004316567 A JP 2004316567A JP 2003112660 A JP2003112660 A JP 2003112660A JP 2003112660 A JP2003112660 A JP 2003112660A JP 2004316567 A JP2004316567 A JP 2004316567A
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JP
Japan
Prior art keywords
fuel
tank
pump
sub
jet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003112660A
Other languages
Japanese (ja)
Inventor
Kiyoshi Osada
長田  喜芳
Original Assignee
Denso Corp
株式会社デンソー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp, 株式会社デンソー filed Critical Denso Corp
Priority to JP2003112660A priority Critical patent/JP2004316567A/en
Priority claimed from US10/793,039 external-priority patent/US6981490B2/en
Publication of JP2004316567A publication Critical patent/JP2004316567A/en
Pending legal-status Critical Current

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Abstract

An object of the present invention is to provide a fuel supply device capable of reducing fluctuations in the amount of fuel in a sub-tank regardless of the amount of fuel supplied outside the fuel tank.
A pump module is housed in a main chamber of a sub tank. The jet pump 60 for pumping is attached to the inflow port 26 outside the sub-tank 20, and the jet pump 70 for transfer is housed in the sub-chamber 102 of the sub-tank 20. A connecting member 51 is attached in the middle of the pressurizing passage of the fuel pump 32, and a part of the fuel during pressurizing of the fuel pump 32 is supplied from the connecting member 51 through the nylon pipe 50 and the connecting member 52 to the jet pumps 60 and 70. Is done. An almost constant amount of fuel can be supplied to the jet pumps 60 and 70 from the pressurized passage of the fuel pump 32 regardless of the fuel consumption on the engine side.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fuel supply device that supplies fuel in a fuel tank having a plurality of tank chambers to the outside of the fuel tank.
[0002]
[Prior art]
2. Description of the Related Art There is known a fuel supply device that ejects return fuel of a pressure regulator that regulates the discharge pressure of a fuel pump from a jet pump for pumping, and supplies fuel in a fuel tank to a sub-tank (for example, see Patent Document 1). ). When the fuel supply device of Patent Document 1 is installed in a fuel tank having a plurality of tank chambers, the fuel is transferred from another tank chamber to the tank chamber side where the fuel pump is installed. It is conceivable to use a transfer jet pump for ejecting the return fuel of the pressure regulator.
[0003]
[Patent Document 1]
JP 2001-20900 A (FIG. 1)
[0004]
[Problems to be solved by the invention]
However, in the configuration in which the fuel discharged from the pressure regulator is supplied to both the pumping pump for pumping and the jet pump for transfer, when the consumption of the fuel regulated by the pressure regulator and supplied to the outside of the fuel tank increases, the fuel is discharged from the pressure regulator. The amount of fuel decreases. Then, the amount of fuel jetted to both jet pumps decreases, and the amount of fuel supplied by the pumping jet pump into the sub-tank decreases. Further, the amount of fuel supplied by the transfer jet pump from another tank chamber to the tank chamber containing the sub-tank is reduced. As a result, when the amount of fuel supplied to the sub-tank decreases, the fuel in the sub-tank decreases, and the fuel tank may not be able to suck the fuel in the sub-tank.
[0005]
Conversely, when the amount of fuel supplied outside the fuel tank decreases and the amount of fuel discharged from the pressure regulator increases, the amount of fuel injected to both jet pumps increases. Then, the amount of fuel supplied by the pumping jet pump into the sub-tank and the amount of fuel supplied by the transfer jet pump from the other tank chamber to the tank room containing the fuel pump are increased. As a result, the amount of fuel supplied into the sub-tank increases, and a large amount of fuel may overflow from the sub-tank. When a large amount of fuel overflows from the sub-tank, the fuel in the fuel tank outside the sub-tank is stirred, so that fuel vapor is likely to be generated, and the fuel that overflows from the sub-tank falls when the fuel remaining in the fuel tank is low. Doing so may cause noise.
[0006]
In the case where surplus fuel returned from the internal combustion engine (hereinafter referred to as “engine”) is used as the jet fuel of the jet pump instead of the fuel discharged from the pressure regulator, for example, fluctuations in the amount of fuel consumed by the engine also occur. As a result, the amount of fuel ejected by the jet pump changes, and the amount of fuel in the sub tank fluctuates.
The present invention has been made in order to solve the above-described problem, and has as its object to provide a fuel supply device that can reduce fluctuations in the amount of fuel in a sub-tank, regardless of the amount of fuel supplied outside the fuel tank. I do.
[0007]
[Means for Solving the Problems]
According to the first to seventh aspects of the present invention, a part of the fuel pressurized by the fuel pump is supplied as jet fuel of the first jet pump for pumping and the second jet pump for transfer. In the present invention, the term “fuel pressurized by the fuel pump” means both fuel that is pressurized in the fuel pump and fuel that is pressurized and discharged by the fuel pump. By employing such a configuration, a substantially constant amount of fuel can be supplied to both jet pumps regardless of the amount of fuel supplied from the fuel supply device to the outside of the fuel tank. As a result, a certain amount of fuel is supplied from the first tank chamber into the sub-tank, and a certain amount of fuel is supplied from the second tank chamber to the first tank chamber side. Irrespective of the consumption amount, it is possible to maintain the liquid level of the fuel, secure the fuel sucked by the fuel pump in the sub-tank, and reduce the fluctuation of the fuel amount. Therefore, the fuel pump can reliably suck the fuel in the sub tank. Further, since a large amount of fuel can be prevented from overflowing from the sub tank to the fuel tank outside the sub tank, the fuel in the fuel tank can be prevented from being agitated, and the amount of fuel vapor generated in the fuel tank can be reduced. . Further, it is possible to suppress generation of noise due to the fuel overflowing from the sub tank falling into the fuel tank.
[0008]
The invention according to claim 2 employs a configuration in which fuel that is being pressurized by the fuel pump is supplied to both jet pumps. Since the pressure of the fuel during the pressurization increases from the low-pressure intake fuel to the high-pressure discharge fuel, the pressure of the ejected fuel supplied to both jet pumps can be adjusted by changing the position at which the fuel during the pressurization is removed. Thus, the amount of fuel supplied to the sub-tank can be adjusted according to the performance required of the fuel supply device, and fluctuations in the amount of fuel in the sub-tank can be reduced.
[0009]
According to the third aspect of the invention, the jet fuel is supplied to both jet pumps from the middle of the pressurizing passage formed along the outer peripheral edge of the rotating member. Due to the rotation of the rotating member, the fuel in the pressurization passage is pressurized in the rotational direction from low pressure to high pressure. Therefore, the pressure of the ejected fuel supplied to both jet pumps can be easily adjusted by adjusting the rotational direction position of the pressurized passage from which the ejected fuel is taken out.
[0010]
According to the fourth aspect of the present invention, since the check valve is provided near the discharge port of the fuel pump, the volume formed between the booster of the fuel pump and the check valve can be reduced. Since the check valve holds the fuel pressure on the downstream side of the check valve, that is, on the side to which the fuel is supplied, when the fuel pump is stopped, the fuel pump operates by adopting the configuration according to claim 4. Is started, the pressure of the volume formed between the booster and the check valve rises in a short time. Therefore, at the start of operation of the fuel supply device, the pressure of the fuel supplied by the fuel supply device increases in a short time. Therefore, for example, when fuel is supplied from a fuel supply device to an internal combustion engine (hereinafter, the "internal combustion engine" is referred to as an engine), the fuel is supplied in a short time when the engine is started, and the startability of the engine is improved.
[0011]
According to the fifth aspect of the present invention, the fuel that is being pressurized is supplied to both jet pumps, and the check valve is provided on the upstream side of the fuel filter including the inlet of the fuel filter. Without reducing the volume formed between the booster of the fuel pump and the check valve. Therefore, at the start of operation of the fuel supply device, the fuel pressure supplied by the fuel supply device reaches the predetermined pressure in a short time.
[0012]
According to the invention described in claim 6, the fuel pump is moved toward one radial direction in the sub tank, and the first jet pump and the second jet pump are installed on the other radial direction in the sub tank. Since the first jet pump and the second jet pump can be installed close to each other, the length of the passage for supplying the jet fuel from the fuel pump to both jet pumps is reduced. Therefore, it is possible to supply the jet fuel from the fuel pump to both jet pumps while minimizing the pressure drop of the fuel supplied to both jet pumps. According to the invention described in claim 7, the transfer pipe for supplying the fuel in the second tank chamber to the first tank chamber side is provided in the fuel tank. Since it is not necessary to make a hole in the fuel tank to install the transfer pipe, the number of sealing portions of the fuel tank can be reduced.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, a fuel supply device 1 according to the present embodiment supplies fuel in a fuel tank 2 to, for example, an engine outside the fuel tank 2. The fuel supply device 1 includes a flange 10, a sub tank 20, a pump module 30, a jet pump 60, a jet pump 70, and the like. FIG. 1 is a cross-sectional view of FIG. 2 in which the jet pump 60 (in FIG. 2, the jet pump 60 is not visible because it is located below the sender gauge 45) is cut at a bent surface through the pressure regulator 48 and the jet pump 70. FIG. Therefore, it is laterally longer than a section cut in a plane.
[0014]
A flange 10 as a lid member of the fuel supply device 1 shown in FIG. 1 is formed in a disk shape, and is formed on an upper wall of the fuel tank 2 so as to cover the opening 2a of the fuel tank 2 as shown in FIG. Installed. The fuel tank 2 is a saddle-type fuel tank including a first tank chamber 3 containing a sub-tank 20 and a second tank chamber 4 not containing a sub-tank 20. A fuel discharge pipe (not shown) and an electrical connector (not shown) are attached to the flange 10. Parts other than the flange 10 of the fuel supply device 1 are accommodated in the fuel tank 2.
[0015]
The sub-tank 20 is formed in a tubular shape having a bottom portion, and has a step portion 28 in which a part in the circumferential direction is recessed radially inward in the side wall 22 as shown in FIG. The sub-tank 20 is formed in a substantially cylindrical shape except for the step portion 28, and the step portion 28 of the sub-tank 20 is formed flat. A jet pump 60 (see FIG. 1) and a sender gauge 45 are installed in the step 28.
[0016]
One end of a shaft (not shown) is press-fitted into the flange 10, and the other end is loosely inserted into an insertion portion 23 formed in the sub tank 20. The insertion portion 23 is formed at a portion where the side wall 22 of the sub-tank 20 is recessed in an arc shape radially inward of the sub-tank 20. Thus, the shaft and the insertion portion 23 do not protrude outside the sub tank 20. Therefore, the projected area of the sub tank 20 from the flange 10 side is reduced. The flange 10 and the sub-tank 20 are urged away from each other by a spring (not shown). Thus, the flange 10 and the sub-tank 20 in which the pump module 30 is housed can reciprocate relatively in the vertical direction of the fuel tank 2. Therefore, even if the fuel tank 2 in which the fuel supply device 1 is housed expands or contracts due to a change in internal pressure or a change in the amount of fuel due to a change in temperature, the bottom of the sub tank 20 is always pressed against the bottom inner wall of the fuel tank 2. .
[0017]
As shown in FIGS. 1 and 2, the internal space of the sub tank 20 is partitioned into a main chamber 100 and a sub chamber 102 by a partition wall 24. Pump module 30 is housed in main chamber 100. The pump module 30 has a fuel pump 32, a suction filter 39, a fuel filter 40, a pressure regulator 48, and the like. As shown in FIG. 3, the fuel pump 32 has a booster 33 and a motor 36. In the step-up unit 33, the impeller 34 as a rotating member rotates together with the shaft 37 of the motor unit 36 to generate an attraction force, and a suction is formed in a C-shaped step-up passage 200 formed along the outer peripheral edge of the impeller 34. The fuel in the sub tank 20 is sucked through the filter 39. The fuel sucked into the pressurizing passage 200 is pressurized in the direction of rotation in the pressurizing passage 200 by rotation of the impeller 34, and is discharged from the discharge port 38 through the motor unit 36. As shown in FIG. 1, the fuel filter 40 has a filter case 41 surrounding the outer periphery of the fuel pump 32 and a filter element 43 housed in the filter case 41. The inflow port 42 of the filter case 41 is fitted into the discharge port 38 of the fuel pump 32 and is connected to the discharge port 38. The check valve 44 is housed in the inlet 42 of the filter case 41 and prevents the fuel discharged from the fuel pump 32 from flowing back to the fuel pump 32 side. The pressure regulator 48 adjusts the pressure of the fuel from which the fuel pump 32 discharges and the foreign matter is removed by the fuel filter 40. The fuel whose pressure has been adjusted is supplied from the flange 10 to the outside of the fuel tank 2 through the bellows pipe 49.
[0018]
A jet pump 60 as a first jet pump for pumping is attached to the inflow port 26 outside the sub tank 20, and a jet pump 70 as a second jet pump for transfer is housed in the sub chamber 102. The check valve 27 prevents the fuel in the main chamber 100 from flowing out of the sub-tank 20 from the inlet 26. As shown in FIG. 2, the pump module 30 is accommodated in the main chamber 100 so as to approach one radial direction side of the sub tank 20. The jet pump 60 and the jet pump 70 are installed close to each other inside and outside the other radial direction of the sub tank 20. Therefore, the path length for supplying the jet fuel from the fuel pump 32 to the jet pumps 60 and 70 is shortened. Thereby, the pressure drop of the jet fuel supplied from the fuel pump 32 to the jet pumps 60, 70 can be reduced.
[0019]
The fuel pump 32 is connected to the jet pump 60 and the jet pump 70 by three flexible nylon tubes 50 and a resin connection member 52 connecting the nylon tubes 50 to each other. As shown in FIG. 3, an air vent hole 202 is formed in the pressure passage 200 along the outer peripheral edge of the impeller 34, and the nylon tube 50 is connected to the air vent hole 202 by a mounting member 51. The fuel that is being pressurized in the pressurizing passage 200 is supplied to the jet pumps 60 and 70 from the air vent hole 202 through the mounting member 51, the nylon tube 50, the connecting member 52, and the nylon tube 50. The fuel pressure supplied from the fuel pump 32 to the jet pumps 60 and 70 can be adjusted by adjusting the rotational position of the air vent hole 202 formed in the pressure increasing passage 200. The air vent hole 202 serves not only to supply the fuel during pressurization to the jet pumps 60 and 70 but also to bleed air from the pressurizing passage 200 when the fuel pump 32 is started.
[0020]
The nylon tube 50 located outside the sub-tank 20 is hooked on an arc portion 29 (see FIG. 2) formed on the outer wall of the sub-tank 20, and is held by the arc portion 29. The path for supplying the jet fuel to the jet pumps 60 and 70 from the booster section of the fuel pump 32 is bent at the upper end of the side wall 22 of the sub-tank 20, and the connecting member 52 is fitted to the upper end of the side wall 22 at the bent portion. I have. An air hole 54 is formed inside the sub-tank 20 of the connection member 52, and three claws 56 are formed on the opposite side of the air hole 54 in the radial direction. A lead wire 46 for sending the output of the sender gauge 45 to the flange 10 side is hooked on the claw 56. The float 47 of the sender gauge 45 can rotate in the same direction as the direction in which the inflow port 80 projects from the sub tank 20. Therefore, when assembling the fuel supply device 1 into the fuel tank 2, the inlet 80 and the float 47 can be inserted into the fuel tank 2 from the opening 2a with the same direction.
[0021]
The jet pump 70 has a nozzle 72, an inflow pipe 73, and an outflow pipe 74, and injects fuel from the nozzle 72 toward the bottom of the sub chamber 102. Since the jet pump 70 is installed vertically along the depth direction of the sub-chamber 102, the diameter of the sub-tank 20 can be reduced as compared with the case where the jet pump 70 is installed horizontally.
The inflow pipe 73 is fitted to the inner wall of the sub tank 20 in the sub chamber 102. The inflow pipe 73 communicates with the inflow port 80, and the outflow pipe 74 opens to the sub chamber 102. The fuel in the second tank chamber 4 is sucked by the fuel ejected from the jet pump 70, and supplied from the transfer pipe 82 to the sub chamber 102 through the inflow port 80, the inflow pipe 73, and the outflow pipe 74.
[0022]
The outflow pipe 74 has a projection 75 protruding on the outer wall in a radially opposite side. The sub-tank 20 has a support plate 25 projecting from the bottom of the sub-chamber 102 so as to face each other. The support plate 25 is formed with a fitting recess 25a having a narrow width from above, and the projection 75 of the outflow pipe 74 fits into the fitting recess 25a. Since the bottom of the fitting recess 25a is formed in a circular shape with a narrow opening side, once the projection 75 is fitted into the fitting recess 25a, the projection 75 is hard to fall out of the fitting recess 25a.
[0023]
A fuel reservoir 104 is formed by the sub tank 20 at the bottom of the sub chamber 102 from which the jet pump 70 ejects fuel. Therefore, for example, even when the fuel is not filled around the nozzle 72 of the jet pump 70 at the time of starting the engine, the fuel pump 32 is operated and the fuel supplied from the fuel pump 32 is ejected from the nozzle 72 with the start of the engine. As a result, fuel is quickly stored in the fuel pool 104 and fills the periphery of the nozzle 72. The jet pump 70 generates a suction force when the fuel is filled around the nozzle 72 and a liquid seal is formed. Therefore, by forming the fuel pool 104 in the fuel ejection direction of the jet pump 70, Thus, the fuel in the second tank chamber 4 can be promptly supplied into the sub tank 20.
[0024]
Next, the operation of the fuel supply device 1 will be described. When the fuel pump 32 is operating, the pressure of the fuel pressurized by the fuel pump 32 is adjusted by the pressure regulator 48 and supplied to the engine through the bellows pipe 49. To the jet pumps 60 and 70, a part of the fuel that is being pressurized is supplied from the air vent hole 202 of the fuel pump 32 through the nylon tube 50, the connecting member 52, and the nylon tube 50. The jet pump 60 generates a suction force by ejecting the fuel to suck the fuel in the first tank chamber 2 and supplies the fuel from the inlet 26 into the sub-tank 20. Fuel supplied from the fuel pump 32 to the jet pump 60 slightly leaks out of the air hole 54. However, since the air hole 54 is located inside the sub-tank 20, the fuel leaked from the air hole 54 returns into the sub-tank 20.
[0025]
When the fuel supplied from the fuel pump 32 is jetted from the nozzle 72 by the jet pump 70, the fuel in the second tank chamber 4 is sucked through the transfer pipe 82 and the inflow port 80 and supplied to the sub chamber 102. The fuel that has flowed into the sub chamber 102 flows into the main chamber 100 over the partition wall 24. By jetting the fuel from the jet pumps 60 and 70 in this way, even if the amount of fuel in the first tank chamber 3 and the second tank chamber 4 decreases, the sub tank 20 is filled with fuel.
[0026]
The fuel pump 32 supplies jet fuel to the jet pumps 60 and 70 from an air vent hole 202 formed in the middle of a pressurizing passage 200 formed along the outer peripheral edge of the impeller 34. The amount of fuel supplied to the jet pumps 60 and 70 from the air vent hole 202 before the pressure is regulated by the pressure regulator 48 is substantially constant regardless of the fuel consumption on the engine side. Therefore, the amount of fuel supplied from the first tank chamber 3 into the sub-tank 20 by the jet pump 60 ejecting the fuel, and the amount of the fuel supplied from the second tank chamber 4 into the sub-tank 20 by the jet pump 70 ejecting the fuel. The amount of fuel used is almost constant. As a result, a substantially constant fuel amount can be secured in the sub tank 20 irrespective of the fuel consumption amount on the engine side.
[0027]
When the fuel pump 32 is stopped by stopping the engine, the air hole 54 is located near the upper end of the side wall 22 of the sub-tank 20, so that air enters through the air hole 54 of the connection member 52 and the fuel in the nylon tube 50 is removed. Is discharged. Therefore, even when the fuel pump 32 is stopped, the fuel in the main chamber 100 of the sub tank 20 flows from the jet pumps 60 and 70 through the nylon pipe 50, the connecting member 52, and the nylon pipe 50 from the booster portion of the fuel pump 32 to the outside of the sub tank 20. Can be prevented from flowing out. Further, the check valve 27 prevents the fuel in the main chamber 100 from flowing out of the sub tank 20 through the inflow port 26. Therefore, even if the fuel pump 32 stops, the fuel level in the main chamber 100 does not decrease.
[0028]
When the fuel level in the sub chamber 102 is higher than the liquid level in the second tank chamber 4 and the fuel pump 32 is stopped, the fuel in the sub chamber 102 flows out of the outlet pipe 74, the inlet pipe 73, and the inlet 80. , From the sub-tank 20 to the second tank chamber 4 through the transfer pipe 82. However, since the main chamber 100 is separated from the sub-chamber 102 by the partition 24, the fuel in the main chamber 100 does not flow into the sub-chamber 102 beyond the partition 24. Therefore, it is possible to prevent the fuel in the main chamber 100 from flowing out of the sub-tank 20 from the sub-chamber 102 through the inlet 80. That is, the partition wall is a backflow prevention unit that prevents the fuel in the main chamber 100 from flowing out of the sub tank 20 through the inlet 80.
[0029]
In the above-described embodiment, the fuel whose pressure is being increased is supplied to the jet pumps 60 and 70 from the air vent hole 202 formed in the pressure increasing passage 200 of the fuel pump 32. The jet pumps 60 and 70 can eject a substantially constant amount of fuel. As a result, a substantially constant amount of fuel is supplied from the first tank chamber 3 and the second tank chamber 4 into the sub-tank 20, so that a shortage of fuel in the sub-tank 20 or a large amount of fuel from the sub-tank 20 occurs. To prevent the fuel from overflowing, and the fluctuation of the fuel amount in the sub tank 20 can be reduced.
[0030]
Here, for example, in order to adjust the amount of fuel supplied by the jet pumps 60 and 70 into the sub-tank 20 in response to a request from the engine side, the rotational position of the air vent hole 202 formed in the boost passage 200 is changed, The pressure of the fuel supplied to the pumps 60 and 70 may be adjusted. It is easy to change the position in the rotation direction where the air vent hole 202 is formed.
[0031]
In the above embodiment, since the check valve 44 is accommodated in the inlet 42 of the filter case 41 fitted with the discharge port 38 of the fuel pump 32, the booster of the fuel pump 32 and the check valve 44 The volume formed between them is small. The check valve 44 prevents the fuel from flowing back to the fuel pump 32, so that the fuel pressure on the downstream side of the check valve 32 is maintained while the engine is stopped. Therefore, when the engine is started and the fuel pump 32 is operated, the fuel pressure between the booster of the fuel pump 32 and the check valve 44 immediately rises, and fuel of a predetermined pressure can be supplied to the engine in a short time. Therefore, the startability of the engine is improved.
[0032]
In the above embodiment, the transfer pipe 82 for transferring the fuel from the second tank chamber 4 to the sub-tank 20 of the first tank chamber 3 is provided in the fuel tank 2. The number of openings formed in the fuel tank 2 is reduced as compared with the case of passing through. Thereby, the number of seal locations for preventing the fuel vapor in the fuel tank 2 from leaking out of the fuel tank 2 is reduced.
[0033]
(Other embodiments)
In addition to the configuration of the fuel tank described above, the number of tank chambers formed in the fuel tank is not limited to two but may be three or more. In this case, the transfer jet pump 70 uses two or more tank chambers other than the first tank chamber in which the fuel pump 32 is housed as the second tank chamber, and transfers the fuel to the first tank chamber side. Alternatively, the fuel in the second tank chamber selected from two or more tank chambers other than the first tank chamber may be transferred to the first tank chamber.
[0034]
In addition, a part of the fuel discharged by the fuel pump 32, for example, a part of the fuel whose pressure has been adjusted by the pressure regulator 48 through the fuel filter 40, is not a fuel in the middle of the pressurization of the fuel pump 32, but a jet pump. 60, 70. That is, the fuel pump 32 starts increasing the pressure of the fuel sucked from the suction port, and the fuel passage 32 has an arbitrary fuel passage formed between the fuel supply device 1 and an engine as a consuming device that consumes the fuel supplied from the fuel supply device 1. A branch is provided at a location, and jet fuel can be supplied to the jet pumps 60 and 70 from the branch. As a matter of course, surplus fuel is not returned from the engine side and used as jet fuel of the jet pumps 60 and 70.
[0035]
Since the fuel discharged from the fuel pump 32 is regulated to a substantially constant pressure by the pressure regulator 48, the fuel pressure supplied to the jet pumps 60 and 70 is also substantially constant. Therefore, when a part of the fuel whose pressure has been adjusted by the pressure regulator 48 is supplied to the jet pumps 60 and 70, the nozzle diameter of the jet pumps 60 and 70 must be adjusted in order to adjust the amount of fuel supplied into the sub tank 20. May be changed to adjust the amount of fuel supplied by the jet pumps 60 and 70 into the sub-tank 20.
Further, a jet pump for transfer may be provided in the first tank chamber 3 outside the sub tank 20, and the fuel in the second tank chamber 4 may be transferred to the first tank chamber 3 outside the sub tank 20.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a fuel supply device according to an embodiment of the present invention.
FIG. 2 is a view as seen in the direction of arrow II in FIG.
FIG. 3 is a partial sectional view showing the fuel pump according to the embodiment.
FIG. 4 is a cross-sectional view showing a state in which a fuel supply device is accommodated in a saddle type fuel tank.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fuel supply device 2 Fuel tank 3 First tank room 4 Second tank room 20 Sub tank 30 Pump module 32 Fuel pump 33 Boosting unit 34 Impeller (rotary member)
36 motor section 38 discharge port 40 fuel filter 42 inflow port 44 check valve 60 jet pump (first jet pump)
70 jet pump (second jet pump)
82 transfer piping 200 boost passage 202 air vent hole

Claims (7)

  1. A fuel supply device for supplying fuel in a fuel tank having a plurality of tank chambers to the outside of the fuel tank,
    A sub-tank installed in a first tank chamber of the plurality of tank chambers;
    A fuel pump that is housed in the sub-tank and sucks fuel in the sub-tank to increase the pressure;
    A first jet pump that is installed in the first tank chamber and generates a suction force by ejecting fuel to supply the fuel in the first tank chamber into the sub tank;
    A second jet pump that generates a suction force by ejecting fuel and supplies fuel in a second tank chamber of the plurality of tank chambers to the first tank chamber side;
    With
    A fuel supply device, wherein a part of the fuel pressurized by the fuel pump is supplied as jet fuel of the first jet pump and the second jet pump.
  2. 2. The fuel supply device according to claim 1, wherein fuel that is being pressurized by the fuel pump is supplied to the jet pumps.
  3. The fuel pump has a rotating member that sucks fuel by rotating and pressurizes the fuel, and supplies ejected fuel to both jet pumps from a middle of a pressure increasing passage formed along an outer peripheral edge of the rotating member. The fuel supply device according to claim 2, wherein:
  4. 4. The fuel supply device according to claim 2, further comprising a check valve installed near a discharge port of the fuel pump to prevent the fuel discharged by the fuel pump from flowing back. 5.
  5. A fuel filter surrounding the fuel pump, inflowing the fuel discharged from the fuel pump from an inflow port, and removing a foreign substance in the inflowing fuel; and the check valve includes a fuel filter including the inflow port. The fuel supply device according to claim 2, wherein the fuel supply device is provided on an upstream side.
  6. The fuel pump is shifted toward one radial direction in the sub tank, and the first jet pump and the second jet pump are installed on the other radial direction of the sub tank. Item 6. The fuel supply device according to any one of Items 1 to 5.
  7. The transfer pipe for transferring fuel in the second tank chamber to the first tank chamber side by a suction force generated by the second jet pump is provided in the fuel tank. 7. The fuel supply device according to claim 6.
JP2003112660A 2003-04-17 2003-04-17 Fuel feed apparatus Pending JP2004316567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003112660A JP2004316567A (en) 2003-04-17 2003-04-17 Fuel feed apparatus

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2003112660A JP2004316567A (en) 2003-04-17 2003-04-17 Fuel feed apparatus
US10/793,039 US6981490B2 (en) 2003-03-13 2004-03-05 Fuel feed apparatus having sub tank and jet pump
US11/236,809 US7069914B2 (en) 2003-03-13 2005-09-28 Fuel feed apparatus having sub tank and jet pump

Publications (1)

Publication Number Publication Date
JP2004316567A true JP2004316567A (en) 2004-11-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003112660A Pending JP2004316567A (en) 2003-04-17 2003-04-17 Fuel feed apparatus

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008045488A (en) * 2006-08-16 2008-02-28 Honda Motor Co Ltd Fuel supply device for general purpose internal combustion engine
JP2008121516A (en) * 2006-11-10 2008-05-29 Aisan Ind Co Ltd Fuel pump unit, fuel pump module, fuel feeder, and fuel tank unit having any one of these devices
JP2008190532A (en) * 2007-02-06 2008-08-21 Denso Corp Fuel pump module
CN106133302A (en) * 2014-04-01 2016-11-16 株式会社电装 Fuel tank cap and there is its petrolift module

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008045488A (en) * 2006-08-16 2008-02-28 Honda Motor Co Ltd Fuel supply device for general purpose internal combustion engine
JP2008121516A (en) * 2006-11-10 2008-05-29 Aisan Ind Co Ltd Fuel pump unit, fuel pump module, fuel feeder, and fuel tank unit having any one of these devices
JP2008190532A (en) * 2007-02-06 2008-08-21 Denso Corp Fuel pump module
CN106133302A (en) * 2014-04-01 2016-11-16 株式会社电装 Fuel tank cap and there is its petrolift module

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