JP2009127514A - Reservoir cup - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a reservoir cup inhibiting entrance of moisture into the inside. <P>SOLUTION: A sub-chamber 42 is provided to communicate with the reservoir cup 10 and is provided with a connection 40 to which a jet nozzle 36 is connected. Negative pressure is generated in the sub-chamber 42 through a communication hole connecting the connection 40 and the sub-chamber 42 by using fuel spouting force by the jet nozzle 36. The sub-chamber 42 is provided with a water-shedding filter 64 through which fuel can pass, fuel in a fuel tank 12 is caused to flow into the sub-chamber 42 through the water-shedding filter 64 and the fuel in the sub-chamber 42 is caused to flow into the reservoir cup 10 through the communication hole. With this, fuel flows into the reservoir cup 10 through the water-shedding filter 64, moisture is shed by the water-shedding filter 64 and the moisture is inhibited from entering the sub-chamber 42 and the reservoir cup 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a reservoir cup for receiving a fuel in a fuel tank and supplying the fuel to an engine.

  2. Description of the Related Art Conventionally, a reservoir cup is provided in a fuel tank of an automobile, and a fuel pump for supplying the fuel in the fuel tank into the reservoir cup and supplying it to the engine is disposed in the reservoir cup.

  In Patent Document 1, the fuel in the fuel tank is caused to flow into the reservoir cup by a jet pump, and extends from the jet pump provided at the top of the reservoir cup to the end of the fuel tank along the bottom surface of the fuel tank. A filter is provided. This filter is provided so that the fuel can be stably sucked by the jet pump even when the vehicle body is tilted in a state where the fuel is low.

On the other hand, water may accumulate in the fuel tank, and in the configuration as described above, water is sucked into the reservoir cup from the jet pump through the filter. In this way, the water sucked into the reservoir cup may cause the components in the reservoir cup to freeze at low temperatures.
Japanese Patent Laid-Open No. 2003-184585

  In view of the above problems, an object of the present invention is to provide a reservoir cup that suppresses intrusion of moisture into the inside.

  The invention according to claim 1 is a reservoir cup provided with a fuel pump that sucks fuel that has flowed into a cup body installed in a fuel tank, and fuel is introduced into an inflow portion into which fuel flows into the cup body. A water repellent filter capable of passing is provided.

  When the fuel in the fuel tank is allowed to flow into the cup body, if water accumulates in the fuel tank, this water will enter the reservoir cup. For this reason, in the first aspect of the present invention, a water repellent filter through which the fuel can pass is provided at the inflow portion where the fuel flows into the cup body. As a result, the fuel flows into the cup body through the water repellent filter, but the moisture is repelled by the water repellent filter and the inflow into the cup body is restricted. For this reason, the penetration | invasion into this cup main body is suppressed.

  According to a second aspect of the present invention, in the reservoir cup according to the first aspect, the inflow portion communicates with the cup main body, and a jet pump for injecting fuel from the fuel tank into the cup main body is connected. It is provided in a negative pressure generating chamber where a negative pressure is generated by the operation of the jet pump.

  According to a second aspect of the present invention, a jet pump is provided for flowing fuel from the fuel tank into the cup body. By connecting this jet pump to a negative pressure generating chamber communicating with the cup body, a negative pressure can be generated in the negative pressure generating chamber by the operation of the jet pump. By providing the inflow portion in the negative pressure generating chamber, only the fuel in the fuel tank is passed to the negative pressure generating chamber through the water repellent filter provided in the inflow portion, and the fuel is passed into the cup body through the negative pressure generating chamber. Can flow in.

  According to a third aspect of the present invention, in the reservoir cup according to the first aspect, the inflow portion is formed in a wall portion of the cup body.

  In the invention according to claim 3, the water repellent filter is provided directly on the cup body by forming the inflow portion in the wall portion of the cup body. Thereby, the configuration of the reservoir cup can be simplified.

  According to a fourth aspect of the present invention, in the reservoir cup according to any one of the first to third aspects, the inflow portion is directed upward from a lowermost portion of the cup body or a lowermost portion of the negative pressure generating chamber. It is characterized by being provided.

  Since fuel (gasoline) and water have a higher specific gravity, the water in the fuel tank accumulates below. For this reason, in the invention described in claim 4, the inflow portion (water repellent filter) is provided upward from the lowermost portion of the cup body or the lowermost portion of the negative pressure generating chamber.

  Here, when the inflow portion is provided only below the cup body or the negative pressure generating chamber, the vehicle may run while tilted or a large amount of water may accumulate in the fuel tank, When the position becomes lower than the water surface, the fuel cannot pass through the water repellent filter provided in the inflow portion. For this reason, by making the position of the upper end part of the inflow part higher than the water surface, fuel can be caused to flow into the cup body by the water repellent filter even in these states.

  According to a fifth aspect of the present invention, in the reservoir cup according to any one of the first to fourth aspects, the inflow portion is provided up to the top of the cup body or the negative pressure generating chamber. Features.

  In the invention described in claim 5, when the inflow portion is provided up to the uppermost portion of the cup body or the negative pressure generating chamber, the vehicle is inclined and a large amount of water is accumulated in the fuel tank. However, the position of the upper end portion of the inflow portion can be made higher than the water surface, and the fuel can be caused to flow into the cup body by the water repellent filter.

  According to a sixth aspect of the present invention, in the reservoir cup according to any one of the second to fifth aspects, a check valve is provided in a communication path that communicates the negative pressure generating chamber and the cup body. It is characterized by.

  According to the sixth aspect of the present invention, the check valve is provided in the communication path that allows the negative pressure generating chamber and the cup body to communicate with each other, so that the fuel in the cup main body is supplied with the negative pressure generating chamber when the jet pump is not operated. To avoid backflow.

  According to a seventh aspect of the present invention, in the reservoir cup according to any one of the second to sixth aspects, the negative pressure generating chamber is provided separately from the cup body, and the negative pressure is generated via the jet pump. The pressure generating chamber and the cup body are connected.

  In the invention of claim 7, the negative pressure generating chamber is provided separately from the cup body, and the shape of the cup body is simplified by connecting the negative pressure generating chamber and the cup body via a jet pump. be able to.

  Since the present invention has the above-described configuration, it is possible to suppress moisture from entering the inside.

Next, the reservoir cup according to the embodiment of the present invention will be described.
As shown in FIG. 1, a reservoir cup (cup body) 10 is provided at the bottom of a fuel tank 12 of a vehicle, and fuel (gasoline) supplied into the fuel tank 12 flows into the reservoir cup 10. It has become so. As shown in FIGS. 1 to 3, the reservoir cup 10 has a substantially cylindrical shape, the inside of the reservoir cup 10 is closed by a lid portion 14 and a bottom portion 16, and a fuel pump 18 is disposed therein. .

  A filter 22 is provided at the suction port 20 of the fuel pump 18, and the fuel sucked into the fuel pump 18 always passes through the filter 22 to filter the fuel and remove dust and foreign matters. Become.

  Further, the exhaust ports 24 and 26 of the fuel pump 18 are branched into two locations, and one of the exhaust ports 24 is provided at the upper portion of the fuel pump 18, and the main pipe 28 is connected to the exhaust port 24. . Fuel is sent to the engine room through the main pipe 28. Further, the main pipe 28 is provided with a high-pressure filter 30, and the inside of the main pipe 28 is made high pressure by the high-pressure filter 30.

  A return pipe 32 is branched from the main pipe 28, and a pressure regulator 34 is provided in the return pipe 32. When the pressure in the main pipe 28 exceeds a predetermined pressure, the pressure regulator 34 is opened so that the pressure in the main pipe 28 is adjusted to be constant, and the valve is opened. Then, the fuel is returned into the fuel tank 12 through the return pipe 32.

  On the other hand, the discharge port 26 of the fuel pump 18 is provided in the lower part of the fuel pump 18, and a jet nozzle pipe 38 having a jet nozzle 36 provided at the tip is connected to the discharge port 26. The jet nozzle pipe 38 passes through the lid portion 14 of the reservoir cup 10 from the discharge port 26 of the fuel pump 18, temporarily exits the reservoir cup 10, is piped into the fuel tank 12, and then is jetted at the tip. The nozzle 36 is connected to a connecting portion (communication path) 40 provided at the lower peripheral wall of the reservoir cup 10.

  Here, as shown in FIG. 3 and FIG. 4, a part of the outer wall of the reservoir cup 10 is integrated with the reservoir cup 10 and protrudes from the outer wall of the reservoir cup 10, and has the same height as the reserve cup 10. A sub chamber (negative pressure generating chamber) 42 is provided, and the connecting portion 40 penetrates the sub chamber 42.

  As shown in FIG. 4, a plate-like check valve 44 is provided on the inner wall surface of the reservoir cup 10 that communicates with the connecting portion 40 so as to be able to swing into the reservoir cup 10. When fuel is ejected from 36 into the reservoir cup 10, it is pushed and released by the fuel (indicated by phantom lines). Further, an elastic body 46 is mounted on the connection portion 40 side of the check valve 44, abuts against the peripheral portion of the connection portion 40 to close the flow path 48 in the connection portion 40, and the fuel in the reservoir cup 10. Is prevented from flowing back into the fuel tank 12.

  In addition, a small communication hole 50 that communicates with the sub chamber 42 is formed in the connection portion 40. As a result, when fuel is ejected from the jet nozzle 36 into the reservoir cup 10 through the connection portion 40, a negative pressure is generated in the sub chamber 42 through the communication hole 50.

  On the other hand, as shown in FIGS. 3 and 5, an opening (inflow portion) 52 is provided on the side wall of the sub chamber 42 substantially orthogonal to the connection portion 40, and the upper edge portion and the lower portion of the opening portion 52 are provided. From the edge, flanges 54 and 56 respectively protrude horizontally toward the inside of the sub chamber 42. Locking holes 58 and 60 are formed in the central portions of the flange portions 54 and 56, respectively.

  Here, a substantially rectangular filter frame member 62 can be fitted into the opening 52, and the filter frame member 62 is formed of a material such as PP or PET, and can pass fuel. An aqueous filter 64 is stretched.

  The peripheral wall portion of the filter frame member 62 is fitted inside the opening 52, and the upper and lower portions of the peripheral wall portion of the filter frame member 62 are engaged with the engagement holes 58 and 60. Possible claw portions 66 and 68 are provided, respectively. In a state where the claw portions 66 and 68 are locked in the locking holes 58 and 60, the filter frame member 62 is attached to the opening 52, and the sub chamber 42 and the fuel tank 12 are partitioned by the water repellent filter 64. Is done.

  Further, a groove portion 62A to which the seal member 63 is attached is formed at the end of the peripheral wall portion of the filter frame member 62. With the seal member 63 fitted in the groove portion 62A, the filter frame member 62 is inserted. The peripheral wall portion and the peripheral wall of the opening 52 are contacted and sealed so that fuel does not leak.

  The fuel jet output from the jet nozzle 36 generates a negative pressure in the sub chamber 42, and the negative pressure causes the fuel in the fuel tank 12 to flow into the sub chamber 42 via the water repellent filter 64. . The fuel that has flowed into the sub chamber 42 flows into the reservoir cup 10 through the communication hole 50.

(Action / Effect)
Next, the operation of the reservoir cup according to the embodiment of the present invention will be described.
When water is accumulated in the fuel tank, if the fuel is allowed to flow from the fuel tank to the reservoir cup, the water will enter the reservoir cup.

  For this reason, in this embodiment, as shown in FIG. 6, the sub chamber 42 is provided outside the reservoir cup 10, and the reservoir cup 10 and the sub chamber 42 are connected to each other through the communication hole 50 formed in the connection portion 40. Communication is possible. A connecting portion 40 is provided in the sub chamber 42, a jet nozzle 36 is connected to the connecting portion 40, and the fuel jet output from the jet nozzle 36 is used to enter the sub chamber 42 through the communication hole 50 of the connecting portion 40. Negative pressure is generated.

  The sub chamber 42 is provided with a water repellent filter 64 through which fuel can pass, and the fuel in the fuel tank 12 is caused to flow into the sub chamber 42 through the water repellent filter 64 and through the communication hole 50. The fuel is allowed to flow into the reservoir cup 10.

  The fuel in the fuel tank 12 flows into the reservoir cup 10 from the sub chamber 42. By providing the water repellent filter 64, the fuel flows into the reservoir cup 10 through the water repellent filter 64. Since the water is repelled by the water repellent filter 64, entry of the moisture into the sub chamber 42 and the reservoir cup 10 is suppressed.

  Here, as shown in FIGS. 1 and 3, the reservoir cup 10 is provided at the bottom of the fuel tank 12, and the sub chamber 42 is provided outside the reservoir cup 10 so as to be at the same height as the reservoir cup 10. . Then, a filter frame member 62 in which a water repellent filter 64 is stretched is fitted into an opening 52 provided on the side wall of the sub chamber 42. That is, the water repellent filter 64 is provided from the bottom 16 of the reservoir cup 10 to the lid 14.

  Since water (gasoline) and water have a higher specific gravity, the water in the fuel tank 12 accumulates below. For this reason, the water repellent filter 64 is provided from the bottom 16 of the reservoir cup 10 toward the lid 14.

  When the water repellent filter 64 is provided only below the reservoir cup 10, the vehicle travels in an inclined state or a large amount of water accumulates in the fuel tank 12, so that the position of the upper end of the water repellent filter 64 is When it becomes lower than the water surface, fuel cannot pass through the water repellent filter 64. For this reason, by making the position of the upper end part of the water repellent filter 64 higher than the water surface, the fuel can be caused to flow into the reservoir cup 10 by the water repellent filter 64 even in these states.

  Here, the sub chamber 42 is provided integrally with the reservoir cup 10 on the outer wall of the reservoir cup 10, and the water repellent filter 64 is provided in the sub chamber 42, but the inflow portion into which fuel flows into the reservoir cup 10. Since it is sufficient that the water repellent filter 64 can be provided, the present invention is not limited to this.

  For example, as shown in FIG. 7, a sub chamber (negative pressure generating chamber) 76 may be provided separately from the reservoir cup (cup body) 74. In this case, as shown in FIGS. 8 and 9, the jet nozzle 70 is of a two-way branch type and is connected to the jet nozzle pipe 38 at the center of the jet nozzle 70.

  Then, one end portion of the jet nozzle 70 is connected to a connection portion (communication path) 72 provided in the reservoir cup 74, and the other end portion of the jet nozzle 70 is connected to the sub chamber 76. Thereby, a suction force is generated on the other end side of the jet nozzle 70 by the fuel jet output from the jet nozzle 70, and a negative pressure can be generated in the sub chamber 76.

  A water repellent filter 64 is provided on the side wall (inflow part) 76A of the sub chamber 76 on the fuel tank 12 side. As a result, when a negative pressure is generated in the sub chamber 76 due to the fuel jet output from the jet nozzle 70, the fuel in the fuel tank 12 flows into the sub chamber 76 through the water repellent filter 64 of the sub chamber 76. Through this, the fuel in the sub chamber 76 can flow into the reservoir cup 74.

  Here, since the water-repellent filter 64 only needs to be set so that the position of the upper end portion thereof is higher than the water surface, the height of the water-repellent filter 64 and the reservoir cup 74 does not necessarily have to be substantially the same. Since at least the water repellent filter 64 only needs to be provided upward from the bottom of the reservoir cup 74, the sub chamber 76 (water repellent filter 64) may be formed lower than the reservoir cup 74.

  In addition, here, the sub chamber 76 has a substantially rectangular parallelepiped shape, and the reservoir cup 74 has a shape in which a part of the arc portion is cut out in a square shape in order to accommodate the sub chamber 76. . Thereby, the plane areas of the reservoir cup 74 and the sub chamber 76 can be reduced, and the overall size can be reduced. Further, the shapes of the reservoir cup 74 and the sub chamber 76 can be simplified.

  In the above embodiment, the jet nozzles 36 and 70 are provided. However, the jet nozzles 36 and 70 are not always necessary, and the reservoir cup (not shown) is drawn from the fuel tank 12 using the suction force of the fuel pump 18. The fuel may be allowed to flow in. In this case, an opening serving as an inflow portion may be formed in the peripheral wall of the reservoir cup, and the water repellent filter 64 may be provided in the opening.

  Furthermore, it is needless to say that the above embodiment is merely an example, and can be appropriately changed without departing from the gist of the present invention.

1 is an overall configuration diagram of a reservoir cup and a fuel tank according to an embodiment of the present invention. 1 is an overall configuration diagram of a reservoir cup according to an embodiment of the present invention. It is a schematic perspective view which shows the connection part with the reservoir cup which concerns on embodiment of this invention, a subchamber, and a jet nozzle. It is a cross-sectional perspective view which shows the connection part of the reservoir cup and jet nozzle which concern on embodiment of this invention. It is a cross-sectional perspective view for demonstrating the method of attaching a water repellent filter to the subchamber of the reservoir cup which concerns on embodiment of this invention. It is a schematic plan view for demonstrating the effect | action of the reservoir cup which concerns on embodiment of this invention. It is a schematic plan view which shows the modification of the reservoir cup which concerns on embodiment of this invention. It is a schematic sectional drawing for demonstrating the effect | action of the modification of the reservoir cup which concerns on embodiment of this invention. It is a schematic front view which shows the modification of the reservoir cup which concerns on embodiment of this invention.

Explanation of symbols

10 Reservoir cup (cup body)
12 Fuel tank 14 Lid (top)
16 Bottom (bottom)
18 Fuel pump 36 Jet nozzle 40 Connection (communication path)
42 Sub chamber (negative pressure generating chamber)
44 Check valve 52 Opening (inflow part)
64 Water repellent filter 70 Jet nozzle 72 Connection (communication path)
74 Reservoir cup (cup body)
76A side wall (inflow part)
76 Sub chamber (negative pressure generating chamber)

Claims (7)

A reservoir cup provided with a fuel pump for sucking fuel flowing into a cup body installed in a fuel tank,
A reservoir cup, wherein a water-repellent filter through which fuel can pass is provided at an inflow portion where fuel flows into the cup body. The inflow part is
A jet pump that communicates with the cup body and that allows fuel to flow from the fuel tank into the cup body is connected to the cup body, and is provided in a negative pressure generating chamber that generates a negative pressure by the operation of the jet pump. The reservoir cup according to claim 1.   The reservoir cup according to claim 1, wherein the inflow portion is formed in a wall portion of the cup body.   The reservoir cup according to any one of claims 1 to 3, wherein the inflow portion is provided upward from a lowermost portion of the cup body or a lowermost portion of the negative pressure generating chamber.   The reservoir cup according to any one of claims 1 to 4, wherein the inflow portion is provided up to an uppermost portion of the cup body or the negative pressure generating chamber.   The reservoir cup according to any one of claims 2 to 5, wherein a check valve is provided in a communication path that allows the negative pressure generation chamber and the cup body to communicate with each other.   The negative pressure generating chamber is provided separately from the cup body, and the negative pressure generating chamber and the cup body are connected via the jet pump. Reservoir cup according to.

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