JP2012077731A - Valve device and fuel supply device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel supply device which ensures high engine restart performance using a single valve device.SOLUTION: A pressure valve 70 is mounted in a fuel tank from which fuel is supplied to the engine of a vehicle. The valve body 73 of the pressure valve 70 comprises a first opening 71 communicating with a first fuel path 351 and a second opening 72 communicating with a second fuel path 451. When the pressure of the fuel in the first fuel path 351 is higher than the pressure of the fuel in an upper space 41 above a high pressure filter 40, a valve element 74 is unseated from a valve seat 731, resulting in opening of the first and second openings 71 and 72. The fuel is thereby flowed into the second fuel path 451 and the upper space 41. On the other hand, when the pressure of the fuel in the first fuel path 351 is lower than the pressure of the fuel in the upper space 41, the valve element 74 is seated on the valve seat 731, resulting in blocking of the first and second openings 71 and 72. As a result, the fuel in the upper space 41 is not ejected and capable of continuing to maintain its pressure at a high level.

Description

  The present invention relates to a valve device and a fuel supply device using the valve device.

  A conventional fuel supply device that supplies fuel inside a fuel tank to an engine is roughly composed of a fuel pump module including a fuel tank, a reserve cup, and a fuel pump. The fuel introduced from the fuel tank to the reserve cup is pressurized by the fuel pump and sent to the engine via the high pressure filter. On the other hand, part of the pressurized fuel is sent to the jet pump and used as power for introducing the fuel in the fuel tank into the reserve cup.

The conventional fuel pump module includes two valve devices on the downstream side of the fuel pump. One valve device is installed between the fuel pump and a high-pressure filter installed downstream of the fuel pump in a main fuel passage connecting the fuel pump and the engine. The other valve device branches in a main fuel passage between the fuel pump and the one valve device, and is installed in a fuel passage connected to the jet pump. Thereby, it is possible to prevent the fuel remaining in the fuel pump and the main fuel passage from flowing out when the engine is stopped. Therefore, good restartability of the engine can be ensured.
The fuel supply device described in Patent Document 1 includes a total of three valve devices in each of a main fuel passage from the fuel pump to the engine and a fuel passage from the fuel pump to the two jet pumps.

US Pat. No. 7,303,378B2

  However, in the fuel supply device described in Patent Document 1, it is necessary to install a plurality of valve devices on the downstream side of the fuel pump, and the structure of the fuel pump module becomes complicated.

  An object of the present invention is to provide a fuel supply device that ensures good restartability of an engine with a single valve device.

According to the invention which concerns on Claim 1, a valve apparatus is provided with a valve main body and a valve member. The valve body has a first opening, a second opening, and a third opening. The valve member can reciprocate with respect to the valve body, and simultaneously closes or opens the first opening, the second opening, and the third opening.
According to the invention which concerns on Claim 2, when a valve member contact | abuts to the valve seat of a valve main body, all the 1st opening, 2nd opening, and 3rd opening are interrupted | blocked independently, and from the valve seat of a valve main body, When the valve member is separated, the first opening, the second opening, and the third opening are all connected to each other.
The valve member included in the valve device can be brought into contact with and separated from the valve seat formed in the valve body by reciprocal movement with respect to the valve body. As shown in FIG. 1, when the valve member is in contact with the valve seat, the first opening, the second opening, and the third opening are all closed. Thereby, each opening will become independent and the flow of the fluid between openings will be interrupted | blocked. On the other hand, when the valve member is separated from the valve seat, the first opening, the second opening, and the third opening communicate with each other. Thereby, the fluid that has flowed into one of the openings can flow into the other remaining openings. Therefore, the fluid flow in the three directions can be controlled at a time by the reciprocating movement of one valve member.

  According to the invention of claim 3, the valve body includes a first opening, a third opening having an inner diameter larger than the inner diameter of the first opening, and a conical slope connecting the inner wall of the first opening and the inner wall of the third opening. And a second opening is formed in the valve seat. The valve seat that comes into contact with and separates from the valve member has a conical slope shape whose cross-sectional area increases from the first opening toward the third opening. Thereby, when the valve member and the valve seat are separated from each other, the fluid flowing from the first opening can flow without stagnation through the third opening.

  According to the invention which concerns on Claim 4, a valve body connects the 1st opening, the 3rd opening which has an internal diameter larger than the internal diameter of a 1st opening, the inner wall of a 1st opening, and the inner wall of the said 3rd opening. And the second opening is formed in the valve seat. The valve seat where the valve member and the valve seat come into contact with and separate from each other has a planar shape. Thereby, processing can be facilitated as compared with a curved valve seat.

  According to the invention which concerns on Claim 5, the location where the valve member can contact | abut to a valve seat is formed with the elastic material. Thereby, when a valve member and a valve seat contact | abut, adhesiveness is securable. Therefore, the sealing performance of each of the first opening, the second opening, and the third opening can be improved.

  According to the invention of claim 6, the fuel supply device has the valve device, the fuel pump, the jet pump, and the pressure accumulating member according to any one of claims 1 to 5. The fuel pump has a discharge port that communicates with the first opening of the valve device. The jet pump injects the fuel flowing through the first opening and the second opening out of the fuel discharged from the discharge port, and the fuel supply source pumped up by the fuel pump by the negative pressure suction force at the time of injection The fuel from another fuel supply source is sucked up, and the sucked-up fuel is supplied to the fuel supply source. The pressure accumulating member holds the fuel pressure of the third opening of the valve device. The fuel whose pressure is maintained is used when the engine is restarted.

The valve device opens when the fuel pressure in the first opening is higher than the fuel pressure in the third opening. At this time, a communication space formed by the valve member and the valve seat communicates the first opening, the second opening, and the third opening with each other. The fuel flows into the communication space from the first opening, and the fuel flows into the third opening via the communication space. The fuel that has flowed into the communication space also flows into the second fuel passage via the second opening.
On the other hand, the valve is closed when the fuel pressure in the first opening is lower than the fuel pressure in the third opening. As a result, the first opening, the second opening, and the third opening are independently blocked. At this time, since the fuel of the pressure accumulating member does not flow out, the fuel pressure does not decrease. As a result, the fuel used when the engine is restarted is held at a high pressure. Therefore, good restartability of the engine can be ensured with a single valve device.

  Further, when a fuel drain hole is provided instead of the valve device, a part of the pressurized fuel is discharged from the fuel drain hole when the engine is operated, and the energy utilization efficiency of the fuel pump is lowered. On the other hand, in the invention according to claim 6, since the second opening is closed by the valve member, the fuel remaining in the pressure accumulating member is not discharged through the second opening when the engine is stopped. Thereby, it is not necessary to install a fuel drain hole, and pressurized fuel is not discharged. Therefore, the energy utilization efficiency of the fuel pump can be improved.

  According to the invention which concerns on Claim 7, the high pressure filter which filters the fuel supplied to an engine is installed in a pressure accumulation member. The high-pressure filter occupies a large volume in the fuel passage, and in order to ensure good restartability of the engine, it is necessary that a large amount of high-pressure fuel necessary for starting the engine remains. By installing the high pressure filter on the downstream side of the valve device, high pressure can be maintained without causing the fuel remaining in the high pressure filter to flow out when the engine is stopped. Thereby, even if it uses one valve device, it is possible to ensure good restartability of the engine.

  According to the invention which concerns on Claim 8, a valve apparatus is installed in the cover part of the housing which accommodates a fuel pump and a high pressure filter. Thereby, the space required for installation of the valve device can be saved, and the space required for installation of the fuel supply device can be reduced.

  According to the ninth aspect of the present invention, the valve member includes the biasing member having a biasing force that comes into contact with the valve seat. Thus, even when the fuel pressure in the first opening is higher than the fuel pressure in the third opening immediately after the engine is stopped, the first opening and the second opening are closed unless the pressure difference is equal to or greater than a certain value. When the fuel pipe between the engine and the engine is damaged, it is possible to prevent the fuel more than the volume in the fuel pipe between the valve device and the engine from flowing out.

It is an effect | action figure showing the function by opening and closing of the valve apparatus of 1st Embodiment of this invention. It is a schematic diagram which shows the fuel supply apparatus and fuel tank which used the valve apparatus of 1st Embodiment of this invention. It is typical sectional drawing which shows the fuel supply apparatus using the valve apparatus of 1st Embodiment of this invention. It is typical sectional drawing which shows the valve apparatus vicinity in the fuel supply apparatus using the valve apparatus of 1st Embodiment of this invention. FIG. 3 is a schematic cross-sectional view of the fuel supply device using the valve device according to the first embodiment of the present invention in the vicinity of the upper portion of the fuel pump and in the open state of the valve device. FIG. 3 is a schematic cross-sectional view of the fuel supply device using the valve device according to the first embodiment of the present invention in the vicinity of the upper portion of the fuel pump and in a closed state of the valve device. (A) It is a block diagram which shows the fuel supply apparatus using the valve apparatus of 1st Embodiment of this invention. (B) It is a block diagram which shows the fuel supply apparatus of a comparative example. It is typical sectional drawing which shows the valve apparatus vicinity in the fuel supply apparatus using the valve apparatus of 2nd Embodiment of this invention. It is typical sectional drawing which shows the valve apparatus vicinity in the fuel supply apparatus using the valve apparatus of 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 2, a fuel supply device 1 that supplies fuel to a vehicle engine using a pressure valve 70 as a “valve device” of the present embodiment is housed in a fuel tank 1. The fuel tank 100 is formed in a bowl shape in accordance with the shape of the vehicle mounting space. Specifically, as shown in FIG. 2, the fuel tank 100 has a bowl-like shape partitioned into a first fuel tank 101 and a second fuel tank 102 by a partition wall 81. The first fuel tank 101 accommodates the fuel supply device 1 and a fuel level gauge (not shown). The fuel in the second fuel tank 102 is transferred to the first fuel tank 101 via the soot transfer flexible hose 18.

  The fuel supply apparatus 1 includes a reserve cup 20 as a storage unit, a fuel pump 30, a soot transfer jet pump 50, a pumping jet pump 55, and the like.

  An opening formed in the upper wall of the fuel tank 100 on the first fuel tank 101 side is closed by a fuel tank lid member 11 via a seal member (not shown). The fuel tank lid member 11 is formed in a disk shape from resin. The fuel tank lid member 11 is provided with a discharge port 14 and an electrical connector 15. The electrical connector 15 supplies power to the fuel pump 30 via a lead wire (not shown). The discharge port 14 flows the fuel discharged from the fuel pump 30 toward the outside of the fuel tank 100. In the fuel supply device 1, members such as the reserve cup 20 other than the fuel tank lid member 11 are accommodated inside the first fuel tank 101.

  The fuel supply device 1 includes a shaft 12 that supports the fuel tank lid member 11 and the reserve cup 20 so as to be relatively reciprocally movable in the axial direction. One end of the shaft 12 in the axial direction is press-fitted into the fuel tank lid member 11, and the other end is supported by a support portion (not shown) installed in the reserve cup 20. A fuel tank spring 13 as an urging means is installed on the outer peripheral side of the shaft 12. The fuel tank spring 13 presses the fuel tank lid member 11 and the reserve cup 20 away from each other.

  The fuel tank lid member 11 and the reserve cup 20 are supported by the shaft 12 and can relatively reciprocate in the axial direction. Here, for example, when the fuel tank 100 formed of resin expands or contracts due to a change in internal pressure due to a temperature change or a change in fuel amount, the reserve cup 20 causes the inner bottom portion of the fuel tank 100 to be pressed by the pressing force of the fuel tank spring 13. Pressed against.

  As shown in FIG. 3, the reserve cup 20 is formed of a side wall 24 and a bottom wall 25 at the opposite end where the fuel tank lid member 11 is installed. Inside the reserve cup 20, a fuel pump 30, a high-pressure filter 40, a soot transfer jet pump 50, and the like are accommodated.

  The fuel pump 30 has a suction port 31 for sucking fuel and a discharge port 32 for discharging fuel. The fuel pump 30 is accommodated in a fuel pump housing 333 formed by a housing 33 with the lower side in FIG. 3 as the fuel suction side and the upper side as the fuel discharge side, and the housing 33 is accommodated inside the reserve cup 20. The housing 33 is made of resin. A suction filter 27 is connected to the suction port 31. The suction filter 27 collects relatively large foreign substances contained in the fuel sucked from the inside of the reserve cup 20 by the fuel pump 30.

  A first fuel pipe 35 that forms a first fuel passage 351 that transfers fuel to the high-pressure filter 40 is connected to the discharge port 32 of the fuel pump 30. The first fuel pipe 35 is integral with the lid portion 331 of the housing 33, and the first fuel passage 351 is formed inside the lid portion 331. The first fuel passage 351 communicates with a first opening 71 formed in the pressure valve 70. Details of the pressure valve 70 will be described later.

  The high pressure filter 40 is installed so as to surround the outer periphery of the fuel pump 30. The high-pressure filter 40 is made of filter paper and collects relatively small foreign matters contained in the fuel discharged from the fuel pump 30. The high-pressure filter 40 is accommodated in a high-pressure filter housing 335 formed by the housing 33, and an upper space 41 for installing the pressure valve 70 above the high-pressure filter 40 is formed by the inner wall of the high-pressure filter housing 335. The high-pressure filter housing 335 corresponds to a “pressure accumulating member” described in the claims. The upper space 41 corresponds to a “third opening” recited in the claims.

The high pressure filter 40 is connected to the main fuel passage 651 via the relief valve 60. The relief valve 60 opens when the fuel pressure in the main fuel passage 651 rises above a specified pressure, and returns the fuel into the reserve cup 20.
The fuel adjusted to a predetermined pressure through the relief valve 60 is supplied from the discharge port 14 to an engine (not shown) through the main fuel passage 651 and the engine supply flexible hose 67.

  The soot transfer jet pump 50 includes a soot transfer jet nozzle 51, a soot transfer fuel suction port 52, a soot transfer fuel discharge port 53, a soot transfer fuel pipe 54, and the like. A soot transfer fuel passage 541 formed by the soot transfer fuel pipe 54 communicates the soot transfer fuel suction port 52 and the soot transfer fuel discharge port 53. The soot transfer fuel suction port 51 is connected to the flexible hose 18 that transports the fuel in the second fuel tank 102, and the fuel in the second fuel tank 102 is transferred to the flexible hose by the injection of fuel from the soot transfer jet nozzle 51. 18, flows into the reserve cup 20 through the soot transfer fuel passage 541 and the soot transfer fuel discharge port 53.

  The pumping jet pump 55 includes a pumping jet nozzle 56, a pumping fuel suction port 57, a pumping fuel discharge port 58, a pumping fuel pipe 59, and the like. The pumping fuel intake port 57 communicates with the inside of the first fuel tank 101. The fuel in the first fuel tank 101 flows into the reserve cup 20 through the pumping fuel pipe 59 and the pumping fuel discharge port 58 by the injection of fuel from the pumping jet nozzle 56.

  The soot-transfer jet pump 50 and the pump-up jet pump 55 include a second fuel transfer pipe 45 and a jet pump fuel passage that form a second fuel passage 451 for transferring a part of the fuel pressurized by the fuel pump 30. A fuel pipe 47 for a jet pump forming 471 is connected. Specifically, the jet pump fuel passage 471 is connected to a jet pump fuel pipe connection port 452 formed in the lid portion 331 of the housing 33. The pressurized fuel branched by the pressure valve 70 is distributed to the soot-transfer jet pump 50 and the pump-up jet pump 55 and used as power for fuel suction in each jet pump.

Details of the pressure valve 70 will be described with reference to FIG.
The pressure valve 70 includes a valve body 73, a valve body 74, a valve shaft 75, a valve shaft support portion 76, and a support portion support 77. The valve body 74 corresponds to a “valve member” described in the claims.
The valve body 74 is made of substantially conical rubber and has an inclined surface 741 whose outer wall is formed in a conical shape. The valve main body 73 forming the valve seat 731 facing the inclined surface 741 has an inner wall formed in a conical shape on the lid portion 331 of the housing 33. The valve body 73 has a first opening 71 formed at the apex of the conical shape of the valve seat 731. The first opening 71 communicates with the first fuel passage 351. Further, the valve body 73 has a second opening 72 at the approximate center of the valve seat 731. The second opening 72 communicates with the second fuel passage 451 formed in the lid portion 331. The first opening 71 and the second opening 72 are closed by the valve body 74 being seated on the valve seat 731, and the first opening 71 and the second opening 72 are opened by being separated. When the valve body 74 is separated from the valve seat 731, a communication space 78 is formed between the inclined surface 741 and the valve seat 731 (see FIG. 5). The communication space 78 communicates the first opening 71, the second opening 72, and the upper space 41. A valve shaft upper end portion 751 of the valve shaft 75 is connected to the approximate center of the valve body lower surface 742 corresponding to the conical bottom surface of the valve body 74.

  The valve shaft 75 has a substantially cylindrical shape and is made of brass. A valve shaft lower end portion 752 opposite to the valve shaft upper end portion 751 connected to the valve body lower surface 742 is slidably installed on the valve shaft support portion 76, and together with the valve body 74 connected integrally therewith, the valve seat. A reciprocating movement can be performed vertically along the central axis 731.

The valve shaft support portion 76 has a communicating space 761 that supports movement of the valve body 74 and the valve shaft 75 in the up and down direction. Specifically, the communication space 761 penetrates substantially the center of the valve shaft support portion 76 in the vertical direction, and the valve shaft 75 is inserted from above the communication space 761. The inserted valve shaft 75 slides in the vertical direction along the inner wall 762 forming the communication space 761.
The valve shaft support portion 76 is connected to the lower surface 337 of the lid portion 331 of the housing 33 by a support portion support 77 installed on the upper surface 763 of the valve shaft support portion 76. As a result, the valve shaft support portion 76 is fixed at a predetermined position.

(Function)
Next, the fuel supply device 1 according to this embodiment will be described separately based on FIGS. 5 and 6 when the engine is operating and when the engine is stopped.
(When the engine is operating)
When a drive current is supplied from the electrical connector 15 to the fuel pump 30, the fuel pump 30 sucks the fuel in the reserve cup 20 from the suction port 31 via the suction filter 27. The sucked fuel is discharged from the discharge port 32 and reaches the first opening 71 through the first fuel passage 351.

  At this time, as shown in FIG. 5, the valve body 74 is pushed down toward the high-pressure filter 40 installed on the downstream side of the pressure valve 70 by the pressurized fuel discharged from the fuel pump 30. The valve body 74 is separated from the valve seat 731 and a communication section 78 is formed. The fuel flowing through the first fuel passage 351 is transferred to the high pressure filter 40 through the communication space 78 and the upper space 41. Further, when the valve body 74 is separated from the valve seat 731, the second opening 72 formed in the valve main body 73 is opened. At this time, part of the pressurized fuel flowing from the first fuel passage 351 is sent from the communication space 78 to the second fuel passage 451 through the second opening 72. The fuel sent to the second fuel passage 451 is sent to the soot transfer jet pump 50 and the pumping jet pump 55 through the jet pump fuel passage 471. The pressurized fuel sent to the jet pump is used as power for transferring fuel from the second fuel tank 102 to the reserve cup 20 in the soot transfer jet pump 50. In addition, the pump for pumping 55 is used as power for pumping the fuel in the first fuel tank 101 into the reserve cup 20.

(When the engine is stopped)
When the engine is stopped, the supply of drive current to the fuel pump 30 is stopped, so the fuel pressurization operation at the fuel pump 30 is stopped. At this time, the fuel pressure in the fuel pump 30 decreases. Further, the fuel pressure in the second fuel passage 451 decreases. On the other hand, in the high-pressure filter 40 installed on the downstream side of the pressure valve 70, the fuel is not consumed because the engine is stopped, and the fuel remaining in the high-pressure filter 40 remains pressurized to the fuel pump 30. It has become. At this time, as shown in FIG. 6, the valve element 74 is seated on the valve seat 731 due to the difference between the fuel pressure in the first fuel passage 351 and the fuel pressure in the upper space 41, and the first opening 71 and the second opening 72 are Blocked. Thereby, the fuel remaining in the high-pressure filter 40 does not flow out to the reserve cup 20, and the high pressure is maintained.

(effect)
Next, the effect of the fuel supply device 1 according to the first embodiment of the present invention will be described based on FIG. 7 in comparison with a comparative example using two pressure valves in the fuel passage.
(1) In a comparative example using two pressure valves in the fuel passage as shown in FIG. 7B, a fuel passage for supplying fuel to the engine, a fuel passage for sending fuel to a jet pump for pumping up the fuel, Two conventional pressure valves 100 are installed at the two locations.
In the first embodiment of the present invention, the second fuel pipe 45 is directly connected to the pressure valve 70 as shown in FIG. Specifically, a second opening 72 communicating with the second fuel passage 451 is formed in the valve seat 731 of the pressure valve 70. Accordingly, the fuel supply to the second fuel passage 451 and the upper space 41 can be simultaneously controlled by the reciprocating operation of one valve body 74. Therefore, it is possible to ensure good restartability of the engine while using only one pressure valve as compared with the comparative example that requires a plurality of pressure valves.

(2) When a fuel drain hole is used instead of the pressure valve, a fuel drain hole is formed in the fuel pipe for transferring the fuel to the jet pump, and the fuel in the high pressure filter due to the siphon effect when the engine is stopped Prevents the outflow. However, when the engine is operating, the pressurized fuel is always discharged from the fuel drain hole, and part of the energy used for pressurizing the fuel is wasted.
In the first embodiment of the present invention, the fuel supply in two directions is controlled by the reciprocating motion of one valve element 74. When the engine is stopped, the second opening 72 communicating with the second fuel passage 451 is closed by the valve body 74. As a result, the fuel remaining in the high-pressure filter does not move to the second fuel passage 451, so that a fuel drain hole for preventing siphon is not necessary. Therefore, the energy for pressurization used in the fuel pump 30 can be used effectively, and the energy utilization efficiency can be improved.

  (3) The pressure valve 70 connects the valve shaft support portion 76 that slidably holds the valve shaft 75 that reciprocates integrally with the valve body 74 to the lower surface 337 of the lid portion 331 of the housing 33, and the high pressure filter 40. The upper space 41 is accommodated. The upper space 41 is formed by a high pressure filter housing 335 that houses the high pressure filter 40. Thereby, the space for installing the pressure valve 70 can be reduced.

  (4) The valve body 74 has a substantially conical shape. By making the valve seat 731 and the valve body 74 into a substantially conical shape, the fuel flowing in from the first opening 71 can flow without stagnation in the upper space 41.

  (5) Adhesiveness between the inclined surface 741 and the valve seat 731 is increased by using rubber as an elastic member as the material of the valve body 74, and the first opening 71, the second opening 72, and the upper space 41 are sealed. It can be secured.

(Second Embodiment)
Subsequently, a second embodiment of the present invention will be described with reference to FIG. The second embodiment differs from the first embodiment in the shape of the valve body. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st Embodiment, and description is abbreviate | omitted.

  In 2nd Embodiment, as shown in FIG. 8, the valve body 84 is flat form. In accordance with this, the seat surface 831 on which the valve body 84 is seated also has a flat plate shape and can come into contact with the valve body 84. Thereby, in addition to the effects (1), (2), (3) and (5) of the first embodiment, the processing of the valve body 84 and the valve seat 831 can be facilitated.

(Third embodiment)
Subsequently, a third embodiment of the present invention will be described with reference to FIG. 3rd Embodiment is provided with the urging member which gives urging | biasing force to a valve body with respect to 1st Embodiment. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st Embodiment, and description is abbreviate | omitted.

  In the third embodiment, as shown in FIG. 9, a spring 99 is supported as a “biasing member” on the valve body lower surface 942 of the valve body 94 and the upper surface 963 of the valve shaft support portion 96. At this time, the spring 99 has a biasing force in a direction to press the inclined surface 941 of the valve body 94 against the valve seat 931. Thereby, when the fuel pressure in the first fuel passage 351 becomes higher than the fuel pressure in the upper space 41 of the high pressure filter 40 by a certain value or more, the valve element 94 is pushed down to the high pressure filter 40 side, and the first opening 91 and the second The opening 92 is opened.

  In the third embodiment, in order to open the pressure valve 90, a pressure higher than the pressure in the upper space 41 by a certain value or more is required in the first fuel passage 351. Thereby, when there is damage to the fuel pipe between the pressure valve and the engine, it is possible to prevent more fuel from flowing out than the volume in the fuel pipe between the pressure valve and the engine.

(Other embodiments)
(A) In the above-described embodiment, the pressure valve is installed downstream of the fuel pump and upstream of the high-pressure filter. On the other hand, the installation position of the pressure valve is not limited to this. You may install in the downstream of a high pressure filter.

  (A) In the above-described embodiment, the shape of the valve body is a substantially conical shape. On the other hand, the shape of the valve body is not limited to this. It may be spherical or hemispherical.

  (C) In the above-described embodiment, the installation location of the second opening connected to the second fuel passage is set to the approximate center of the valve seat. On the other hand, the installation position of the second opening is not limited to this. Any location other than the location of the first opening in the valve seat may be used.

  (D) In the above-described embodiment, the valve body is made of rubber, and the valve shaft is made of brass. On the other hand, the material which forms a valve body, a valve seat, and a valve shaft does not need to be restricted to this.

  (E) In the above description, the embodiment in which the present invention is applied to the fuel supply device that supplies fuel to the engine of the vehicle has been described. However, the present invention is not limited to such an embodiment. Implementation in various forms is possible without departing from the gist.

10: Fuel supply device,
20 ・ ・ ・ Reserve cup,
30 ... Fuel pump,
33 ・ ・ ・ Housing,
335... High pressure filter housing (pressure accumulating member),
35 ... first fuel pipe,
351 ... first fuel passage,
40 ・ ・ ・ High pressure filter,
41 ... Upper space (third opening),
45 ・ ・ ・ second fuel pipe,
451 ... second fuel passage,
50 ・ ・ ・ Jet pump for jet transport (jet pump),
55 ・ ・ ・ Pumping jet pump (jet pump),
70, 80, 90 ... pressure valve (valve device),
71, 81, 91 ... 1st opening,
72, 82, 92 ... second opening,
73, 83, 93 ... valve body,
731, 831, 931 ... valve seat,
74, 84, 94 ... valve body (valve member),
741, 841, 941 ... inclined surface,
78, 88, 98 ・ ・ ・ Communication space,
99: Spring (biasing member).

Claims (9)

A valve body having a first opening, a second opening and a third opening;
And a valve member capable of reciprocating with respect to the valve main body and simultaneously closing or opening the first opening, the second opening, and the third opening.   When the valve member comes into contact with the valve seat of the valve body, all of the first opening, the second opening and the third opening are independently blocked, and when the valve member is separated from the valve seat of the valve body, 2. The valve device according to claim 1, wherein the valve device has a valve configuration in which all of the first opening, the second opening, and the third opening communicate with each other. The valve body has a conical slope-shaped valve that connects the first opening, the third opening having an inner diameter larger than the inner diameter of the first opening, and the inner wall of the first opening and the inner wall of the third opening. And
The valve device according to claim 2, wherein the second opening is formed in the valve seat. The valve body has a planar valve seat that connects the first opening, the third opening having an inner diameter larger than the inner diameter of the first opening, and the inner wall of the first opening and the inner wall of the third opening. And
The valve device according to claim 2, wherein the second opening is formed in the valve seat.   5. The valve device according to claim 3, wherein the valve member is formed of an elastic material at a position where the valve member can come into contact with the valve seat. The valve device according to any one of claims 1 to 5,
A fuel pump having a discharge port communicating with the first opening of the valve device;
What is the fuel supply source that injects the fuel that flows through the first opening and the second opening out of the fuel discharged from the discharge port and pumps up the fuel pump by the negative pressure suction force at the time of injection? A jet pump that sucks up fuel from another fuel supply source and supplies the sucked-up fuel to the fuel supply source;
A pressure accumulating member that holds the fuel pressure of the third opening of the valve device,
The valve device opens when the pressure in the first opening is higher than the pressure in the third opening.   The fuel supply device according to claim 6, wherein the pressure accumulating member includes a high-pressure filter that filters fuel supplied to the internal combustion engine.   The fuel supply device according to claim 6 or 7, wherein the valve device is installed in a lid portion of a housing that houses the fuel pump and the high-pressure filter.   The fuel supply device according to any one of claims 6 to 8, wherein the valve device includes an urging member having an urging force for abutting the valve member against the valve seat.

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