JP2016125444A - Fuel supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To curb generation of oscillation on a fuel supply device mounted with a jet pump.SOLUTION: A fuel supply device 1 comprises a jet pump 4 which can move fuel other than the injected fuel by injecting the fuel through an injection nozzle 40 which has a supply passage 41 where fuel can be introduced thereinto and injection passages 42 used for injecting the fuel. In the fuel supply device 1, a fuel flow direction in at least a portion of the supply passage 41 is at angles with the fuel flow directions in the injection passages 42. Provided with a plurality of injection passages 42, the fuel supply device 1 allows the fuel to flow in a plurality of directions in the injection passages 42, thereby reducing excitation force compared to a case of a single injection passage 42 having the largest reference cross-sectional area among the plurality of injection passages 42.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fuel supply apparatus. More specifically, the present invention relates to a fuel supply device that supplies fuel in a fuel tank mounted on a vehicle such as an automobile to an internal combustion engine.

  2. Description of the Related Art Conventionally, supplying fuel to an internal combustion engine using a fuel supply device and attaching the fuel supply device to a fuel tank are widely known. In addition, as described in Patent Document 1, it is also known to employ a configuration in which a fuel supply device includes a jet pump. The jet pump used in the fuel supply device allows the fuel located around the injection nozzle to move to a predetermined location by injecting the fuel vigorously from the injection nozzle.

JP 2014-92041 A

  However, there is still room for improvement in the technique described in Patent Document 1. In the jet pump described in Patent Document 1, an injection nozzle is disposed on the downstream side of the fuel pump, and the fuel can be injected from the injection nozzle. The fuel passage provided in the injection nozzle is configured to be bent at approximately 90 degrees. With such a configuration, a force is easily applied to the injection nozzle in a direction different from the injection direction. This force becomes an excitation force that shakes the jet pump and the like, and there is a possibility that vibration and noise occur in the fuel supply device.

  The present invention was devised in view of the above points, and the problem to be solved by the present invention is to suppress the occurrence of vibration or the like in the fuel supply device provided with the jet pump. There is to do.

  In order to solve the above problems, the present invention takes the following means. First, the first invention is a fuel other than the injected fuel by injecting fuel from an injection nozzle comprising a supply passage through which fuel can be introduced and an injection passage used for injecting fuel. A fuel supply device comprising a jet pump capable of moving the fuel, wherein the fuel traveling direction in at least a part of the supply passage and the fuel traveling direction in the injection passage have an angle. In the case where only one injection passage having the largest reference cross-sectional area is formed among the injection passages by providing a plurality of the injection passages and setting the fuel traveling directions in the injection passages to a plurality of directions. Compared with the fuel supply device, the excitation force is reduced.

  According to the first aspect, since the excitation force is reduced as compared with the case where only one injection passage having the largest diameter is provided, it may be possible to reduce vibration and noise.

（但し、ｎ個の噴射通路における基準断面積Ａ_ｉのうちで最も大きな基準断面積がＡ_１であり、当該基準断面積Ａ_１を備える噴射通路の中心軸に沿う燃料の流れ方向と、他の噴射通路の中心軸に沿う燃料の流れ方向と、を供給通路の中心軸と直交する面に投影した際になす角をθ_ｉとする。） According to a second aspect of the present invention, fuel other than the injected fuel is injected by injecting fuel from an injection nozzle comprising a supply passage capable of introducing fuel and an injection passage used for injecting fuel. A fuel supply device comprising a jet pump capable of moving a fuel, and having an angle between a traveling direction of fuel in at least a part of the supply passage and a traveling direction of fuel in the injection passage. A fuel supply device in which a plurality of the injection passages are provided so as to satisfy the following formula.

(However, the largest reference cross-sectional area A _i of the reference cross-sectional areas A _i in the n injection passages is A ₁ , the fuel flow direction along the central axis of the injection passage having the reference cross-sectional area A ₁ , and the like The angle formed when the fuel flow direction along the central axis of the injection passage is projected onto a plane perpendicular to the central axis of the supply passage is defined as θ _i .)

  According to the second aspect, since the excitation force is reduced as compared with the case where only one injection passage having the largest diameter is provided, it may be possible to reduce vibration and noise.

  ADVANTAGE OF THE INVENTION According to this invention, it can become possible to suppress that a vibration etc. generate | occur | produce in a fuel supply apparatus in a fuel supply apparatus provided with the jet pump.

It is sectional drawing which showed the inside of the fuel supply apparatus of an Example. It is sectional drawing which looked at the injection nozzle of the Example from the side surface. FIG. 3 is a sectional view taken along the line III-III in FIG. 2. It is a figure which shows the relationship between the supply path and injection path in the injection nozzle of a 1st modification. It is a VV arrow line view of FIG. It is sectional drawing of the injection nozzle of a 2nd modification. It is sectional drawing of the injection nozzle of a 3rd modification. It is sectional drawing of the injection nozzle of a 4th modification. It is sectional drawing of the injection nozzle of a 5th modification. It is sectional drawing of the injection nozzle of a 6th modification. It is sectional drawing of the injection nozzle of a 7th modification. It is sectional drawing of the injection nozzle of an 8th modification. It is sectional drawing which looked at the injection nozzle of the 9th modification from the side. It is sectional drawing which looked at the injection nozzle of the 10th modification from the side.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings as appropriate. In this specification, the direction in which the lid member 22 of the fuel supply apparatus 1 shown in FIG. 1 is located is defined as the upper side, and the side in which the fuel pump 3 is located with respect to the lid member is defined as the lower side. In the following, the direction will be mentioned on the assumption that the fuel supply device 1 is mounted on the fuel tank 9 unless otherwise specified.

  The fuel supply device 1 in the present embodiment is mounted on a vehicle. In particular, the vehicle is mounted on a vehicle. The fuel supply device 1 is attached to a fuel tank 9 disposed below the floor surface of the vehicle, and is used to send liquid fuel in the fuel tank 9 to an internal combustion engine (not shown). .

  The fuel supply device 1 according to the present embodiment includes a lid member 22 attached to an opening 92 provided on the upper surface portion 91 of the fuel tank 9 and a fuel used for sending the fuel in the fuel tank 9 to the outside. A pump 3, a reservoir cup 5 in which the fuel pump 3 is housed, a filter 7 that can filter fuel, and a jet pump 4 that can transfer fuel outside the reservoir cup 5 into the reservoir cup 5 are provided. The fuel pump 3 is an electric pump, and can be controlled such as operation and stop by a control device (not shown). Further, the jet pump 4 is configured to inject a part of the fuel discharged from the fuel pump 3 with the injection nozzle 40, thereby transferring the fuel to a predetermined location while entraining the fuel around the injection nozzle 40.

  The lid member 22 of this embodiment includes a set plate portion 23 that covers the opening 92 of the fuel tank 9. The substantially disc-shaped set plate portion 23 is provided with a discharge port 24 used to guide the fuel fed from the fuel pump 3 to the outside of the fuel tank 9. Further, the set plate portion 23 is provided with an electrical connector 25 used for connection of electrical wiring. A part of the fuel is transferred to the discharge port 24 side and the remaining fuel is transferred to the injection nozzle 40 side by the fuel pump 3 that is moved using the electricity supplied from the electric connector 25. The fuel supply device 1 of the present embodiment includes a fuel remaining amount detecting device 21 used for detecting the remaining amount of fuel in the fuel tank 9, and an electric connected to the fuel remaining amount detecting device 21. The wiring is also connected to the electrical connector 25.

  The projecting port of the fuel pump 3 is connected to a pressure regulating valve (not shown), and is configured so that liquid can be fed to the internal combustion engine while being reduced to a predetermined pressure. In the present embodiment, a pipe 28 that branches from a passage connecting the fuel pump 3 and the pressure regulating valve is provided, and a bendable bellows-like hose 6 is connected to connect the pipe 28 and the jet pump 4. It is connected. In addition, an operating valve (not shown) is provided on a path communicating with the jet pump 4 of the pipe 28, and a part of the fuel flowing upstream of the operating valve is discharged to the jet pump 4 side. Is possible.

  The jet pump 4 includes an injection nozzle 40 that can inject fuel. The injection nozzle 40 in this embodiment is attached to the outer peripheral side of the fuel intake port 51 provided along the side surface near the bottom surface of the reservoir cup 5. The injection passage 42 provided in the injection nozzle 40 faces the fuel intake 51, and the fuel injected from the injection nozzle 40 is returned from the fuel intake 51 into the reservoir cup 5. A gap is provided between the fuel intake 51 and the injection nozzle 40 so as to form a suction port 44. The suction port 44 allows fuel outside the reservoir cup 5 to pass through. The reservoir cup 5 is installed on the bottom surface portion 93 of the fuel tank 9.

  By injecting fuel from the injection nozzle 40 toward the fuel intake port 51, a region where the pressure is lower than the periphery is formed around the fuel intake port 51 and the injection nozzle 40. The fuel flowing into the region is transferred into the reservoir cup 5 together with the fuel injected from the injection nozzle 40. The suction port 44 provided between the fuel intake port 51 and the injection nozzle 40 is provided on the side facing the bottom surface portion 93 of the fuel tank 9, so that the fuel remaining in the fuel tank 9 can be easily sucked. It has become.

  As shown in FIG. 2, the outer shape of the injection nozzle 40 of the embodiment is formed in a substantially T shape, and a substantially T-shaped passage is provided in the inside thereof. One end of the passage is connected to the hose 6, a supply passage 41 extending linearly from a portion connected to the hose 6, and a linear injection passage 42 formed to have an angle from the supply passage 41. It has. Here, having an angle means that the traveling direction of the fuel in the injection nozzle 40 and the traveling direction of the fuel in the injection passage 42 are not the same direction. In other words, the supply passage 41 according to the embodiment is a portion connected so as to form a bent passage with an end portion of the injection passage 42 provided as a straight passage, and is linear from the end portion of the injection passage 42. It is the site | part provided in. In addition, since the cross-sectional area of the injection passage 42 is smaller than the cross-sectional area of the supply passage 41, it is possible to inject fuel from the injection passage 42 vigorously.

  As shown by the arrows in FIGS. 2 and 3, the traveling direction of the fuel in the injection passage 42 in this embodiment is provided so as to be substantially orthogonal to the traveling direction of the fuel in the supply passage 41. In the present embodiment, the injection passage 42 is provided with a first injection passage 421 and a second injection passage 422. The substantially cylindrical first injection passage 421 and the substantially cylindrical second injection passage 422 are arranged such that their central axes are arranged on the same straight line and pass through the central axis CI of the supply passage 41. It has been. In other words, a substantially T-shaped passage is formed by the first injection passage 421, the second injection passage 422, and the supply passage 41. Further, the first injection passage 421 and the second injection passage 422 are configured to have the same cross-sectional area.

  In addition to the embodiment described above, the present invention can be implemented in various forms. The first modification shown in FIG. 4 will be described in detail below as a representative example.

  In the present specification, the cross-sectional area of the injection passage 42 is a plane parallel to the central axis CI of the supply passage 41 connected to the injection passage 42, and the injection passage 42 is viewed along the direction of the central axis CI of the supply passage 41. This is the area of the injection passage 42 delimited by a virtual plane that appears to be orthogonal to the central axis 42. Therefore, in the case of the first modification, the area of the circular portion hatched in FIG.

  In this specification, the smallest cross-sectional area among the cross-sectional areas of one injection passage 42 is referred to as a reference cross-sectional area of the injection passage 42. For example, when the cross-sectional area under the above conditions is uniform, the cross-sectional area is the reference cross-sectional area. Further, when the size of the cross-sectional area changes in the injection direction along the central axis of the nozzle like a frustum-shaped hole, the smallest cross-sectional area becomes the reference cross-sectional area in the injection passage 42. However, a portion where a closed line is not formed at a location where the virtual surface and the inner peripheral surface of the injection passage 42 intersect, such as the vicinity of the outer peripheral surface or the inner peripheral surface of the cylindrical injection nozzle 40, defines a reference cross-sectional area. Not subject to. Therefore, for example, the size of the cross-sectional area in the range of W between the broken lines in FIG. 4 is compared to determine the reference cross-sectional area.

  In this specification, when the reference cross-sectional areas in the respective injection passages 42 are compared, one of the injection passages 42 having the largest reference cross-sectional area that is the largest reference cross-sectional area is defined as the reference injection passage. Compared to the case where only the reference injection passage is provided in the injection nozzle 40, another injection passage 42 is provided so that the excitation force can be suppressed. Therefore, the central axis and the reference cross-sectional area of each injection passage 42 are formed so as to satisfy a predetermined condition. Specifically, it is formed so as to satisfy the following formula.

（但し、ｎ個の噴射通路における基準断面積Ａ_ｉのうちで最も大きな基準断面積がＡ_１であり、当該基準断面積Ａ_１を備える噴射通路の中心軸に沿う燃料の流れ方向と、他の噴射通路の中心軸に沿う燃料の流れ方向と、を供給通路の中心軸と直交する面に投影した際になす角をθ_ｉとする。）

(However, the largest reference cross-sectional area A _i of the reference cross-sectional areas A _i in the n injection passages is A ₁ , the fuel flow direction along the central axis of the injection passage having the reference cross-sectional area A ₁ , and the like The angle formed when the fuel flow direction along the central axis of the injection passage is projected onto a plane perpendicular to the central axis of the supply passage is defined as θ _i .)

If the maximum injection duct 42 having a reference cross-sectional area occurs more than one, one of the maximum reference cross-sectional area of the injection duct 42 may satisfy the above expression is taken as A _1, but either of the injection passage 42 and more preferably also the maximum reference cross-sectional area in a case where the a ₁ satisfies the above equation.

  It is sufficient if it satisfies the above formula, but the smaller the left side of the formula, the better. Therefore, it is desirable that the left side is 0. Further, each injection passage 42 is preferably configured to extend radially from the supply passage 41 at equal angles.

For the embodiment shown in FIG. 4, n = 2, the reference cross-sectional area _{A 2} of the reference cross-sectional area _{A 1} and the injection passage 42a2 of the injection duct 42a1 are equal, a theta ₂ = 135 with a theta ₁ = 0. Thus the left-hand side it can be seen that less than A _1. In addition, not only in the case of this form, it is always (theta) ₁ = 0.

  As an example that does not satisfy the above formula, there is a case where θ in all of the injection passage 42 having the reference cross-sectional area and the other injection passages 42 is 90 degrees or less. Further, in the case where three or more injection passages 42 are provided, and only a part of the other injection passages 42 has θ less than 90 degrees, There are cases where the expression is not satisfied. More specifically, in the case where three injection passages 42 are provided, the reference cross-sectional area of θ that is less than 90 degrees among the injection passages 42 other than the maximum reference cross-sectional area is larger than 90 degrees and θ is greater than 180 degrees. If it is less than or equal to the degree but larger than the reference cross-sectional area, the above formula may not be satisfied.

  In addition, it is possible to consider a configuration that satisfies the above formula by using three or more injection passages 42 instead of two. For example, as in the second modification shown in FIG. 6, it is possible to provide three injection passages 42 that are radially formed around the central axis CI of the supply passage 41. In the case of the second modification, the reference cross-sectional areas are all equal. Further, the angle formed by the injection directions of the injection passage 42b2 and the injection passage 42b3 with respect to the injection direction of the reference injection passage 42b1 is an obtuse angle larger than 90 degrees.

  In addition, as in the third modification shown in FIG. 7, two of the three injection passages 42 are to be injected in the same direction, and the other is to be injected in the opposite direction. Is also possible. In the case of the third modification, the injection passage 42c2 and the injection passage 42c3 having a reference cross-sectional area smaller than the reference injection passage 42c1 are injected in the direction opposite to the reference injection passage 42c1.

  In the fourth modified example shown in FIG. 8, of the three injection passages 42, only the injection passage 42 d 2 of the injection passage 42 d 2 and the injection passage 42 d 3 having a reference cross-sectional area smaller than the reference injection passage 42 d 1 is used as the reference injection passage. Inject in the opposite direction to 42d1. Further, the remaining injection passage 42d3 and the reference injection passage 42d1 form an obtuse angle between the injection direction and the reference injection passage 42d1.

  In the fifth modified example shown in FIG. 9, among the three injection passages 42, the reference injection passage 42 e 1 is formed in addition to the injection passage 42 e 2 formed to inject in the direction orthogonal to the injection direction of the reference injection passage 42 e 1. The injection passage 42e3 is provided so that the injection direction and the injection direction form an obtuse angle. The reference cross-sectional areas of the respective injection passages 42 are configured to be equal.

  The sixth modification shown in FIG. 10 includes a reference injection passage 42f1 in addition to the injection passage 42f2 formed so as to be able to inject from the direction opposite to the injection direction of the reference injection passage 42f1 among the three injection passages 42 provided. The injection passage 42f3 is formed so as to be able to inject in a direction orthogonal to the injection direction. In this modification, the injection passage 42f2 that injects in the direction opposite to the injection direction of the reference injection passage 42f1 has the same reference cross-sectional area as the reference injection passage 42f1, and is a direction orthogonal to the injection direction of the reference injection passage 42f1. The reference cross-sectional area of the injection passage 42f3 for injecting into the reference is made smaller than the reference cross-sectional area of the reference injection passage 42f1.

  The seventh modification shown in FIG. 11 is an injection passage 42g2 formed so as to be able to inject in a direction orthogonal to the injection direction of the reference injection passage 42g1 among the three injection passages 42 provided, and the injection of the reference injection passage 42g1. And an injection passage 42g3 that forms an injection direction that forms an obtuse angle. The reference injection passage 42g1 and the injection passage 42g2 formed so as to be able to inject in the direction orthogonal to the reference injection passage 42g1 are formed so that the respective reference sectional areas are equal, and the remaining injection passage 42g3 is larger than the reference injection sectional area. It is formed to have a small reference cross-sectional area.

  In the above-described modification, any of the reference injection passages is formed as a passage extending radially around the central axis CI of the supply passage 41. However, it is conceivable that the reference injection passage is not in such a form. For example, in the eighth modification shown in FIG. 12, the center axis of the reference injection passage 42h1 and the center axis CI of the supply passage 41 are formed so as not to intersect. In this modification, an injection passage 42h2 that injects in the direction opposite to the injection direction of the reference injection passage 42h1, and an injection passage 42h3 that can be injected in a direction orthogonal to the injection direction of the reference injection passage 42h1 are provided. .

  The injection nozzles 40 of the above-described embodiments and modifications are configured such that the fuel introduced from one supply passage 41 is injected from a plurality of injection passages 42, but a case where a plurality of supply passages 41 are provided is also conceivable. For example, in the ninth modified example shown in FIG. 13, two supply passages 41 are provided, one injection passage 42 i 1 is connected to one supply passage 411, and one supply passage 422 is also connected to the other supply passage 422. Two injection passages 42i2 are connected. The directions in which the fuel is injected from the injection passages 42 are formed in opposite directions. Even in the case where a plurality of supply passages 41 are provided in the injection nozzle 40 as in this modification, it is possible to adopt a form in which a plurality of injection passages 42 are connected to each supply passage 41. Further, the angle formed by each of the injection passages 42 is not necessarily 180 degrees, and it is also possible to have a relationship that forms an angle as shown in other modified examples.

  The injection nozzles 40 of the above-described embodiments and modifications are configured so that the central axis of the injection passage 42 is formed on the same plane. In other words, it is configured such that the central axes of all the injection passages 42 are located on one surface orthogonal to the central axis CI of the supply passage 41. Instead of such a configuration, it is also possible to configure so that the central axis of the injection passage 42 is positioned on a plurality of surfaces orthogonal to the central axis CI of the supply passage 41. For example, in the tenth modification shown in FIG. 14, the injection passage 42 j 1 and the injection passage 42 j 2 are connected to one supply passage 41, but the respective injections are made on two surfaces orthogonal to the central axis CI of the supply passage 41. One passage 42 is provided. In other words, the supply passage 41 is connected to the other injection passage 42j1 on the downstream side of the portion connected to the one injection passage 42j2.

  As described above, the embodiment has been described using one embodiment and a plurality of modifications. However, the present invention can be implemented in various other forms in addition to the above embodiment. For example, there is no need to provide the injection direction so as to be orthogonal to the central axis of the supply passage, and the fuel traveling direction in the supply passage and the traveling direction of the injection passage form an acute angle or an obtuse angle. It is also possible.

  The fuel supply device does not require a lid member, and a lid member may be provided separately from the fuel supply device. In addition, the fuel supply device may not include a reservoir cup. In this case, it is also possible to use the fuel remaining in the fuel tank divided into a plurality of parts at a predetermined location.

  The fuel pump is not limited to being disposed inside the fuel tank, but can be disposed outside the fuel tank. As long as a part of the fuel supply device is arranged in the fuel tank and the fuel in the fuel tank can be supplied to the internal combustion engine, the fuel pump may be arranged at any location.

  The fuel sent to the jet pump is not limited to the fuel before being depressurized by the pressure adjustment valve from the fuel pump, but may be the fuel after depressurization.

  The jet pump is not necessarily used to send fuel to the reservoir tank. For example, you may use only for moving a fuel within a fuel tank. Further, a part of the fuel tank can be used for feeding the fuel to the reservoir tank, and the other part can be used for moving the fuel in the fuel tank.

  The vehicle is not limited to a vehicle, and may be a vehicle that flies in the air such as an airplane or a helicopter, or a vehicle that moves on the sea surface or in the sea such as a ship or a submersible.

DESCRIPTION OF SYMBOLS 1 Fuel supply apparatus 3 Fuel pump 4 Jet pump 5 Reservoir cup 9 Fuel tank 40 Injection nozzle 41 Supply channel 42 Injection channel 44 Suction port 51 Fuel intake port

Claims (2)

It is possible to move fuel other than the injected fuel by injecting fuel from an injection nozzle comprising a supply passage through which fuel can be introduced and an injection passage used for injecting fuel Equipped with a jet pump
A fuel supply device configured to have an angle between a traveling direction of fuel in at least a part of the supply passage and a traveling direction of fuel in the injection passage;
By providing a plurality of the injection passages and making the fuel traveling directions in the injection passages a plurality of directions, it is possible to add more than the case of forming only one injection passage having the largest reference cross-sectional area among the injection passages. Fuel supply device with reduced vibration. It is possible to move fuel other than the injected fuel by injecting fuel from an injection nozzle comprising a supply passage through which fuel can be introduced and an injection passage used for injecting fuel Equipped with a jet pump
A fuel supply device configured to have an angle between a traveling direction of fuel in at least a part of the supply passage and a traveling direction of fuel in the injection passage;
A fuel supply device in which a plurality of the injection passages are provided so as to satisfy the following formula.

(However, the largest reference cross-sectional area A _i of the reference cross-sectional areas A _i in the n injection passages is A ₁ , the fuel flow direction along the central axis of the injection passage having the reference cross-sectional area A ₁ , and the like The angle formed when the fuel flow direction along the central axis of the injection passage is projected onto a plane perpendicular to the central axis of the supply passage is defined as θ _i .)

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