Multifunctional injection pump applied to fuel pump

Abstract

According to the multifunctional injection pump applied to the fuel pump, the injection pump assembly is detachably installed on the fuel pump, so that an integrated structure is formed between the injection pump assembly and the fuel pump, the size of the injection pump assembly and the whole fuel pump assembly is reduced, the oil conveying distance is shortened, and the fuel conveying efficiency is remarkably improved. Through the arrangement of the fuel pump connecting structure, the longitudinal position of the injection pump assembly in the oil storage barrel can be limited, it is ensured that the injection pump assembly keeps stable in the working process, and position deviation caused by vibration or impact is avoided. In addition, the arrangement of the oil storage barrel connecting structure not only ensures that the radial position of the injection pump assembly in the oil storage barrel is fixed, but also enhances the sealing performance of the whole structure through close fit with the inner wall of the oil storage barrel, and effectively prevents fuel oil leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel pumps, in particular to a multifunctional jet pump applied to fuel pumps. Background Art

[0002] In existing technology, the multifunctional jet pump on a fuel pump is typically installed independently on one side of the fuel pump. While this design can achieve the fuel injection function, it has several drawbacks. First, the independent installation of the multifunctional jet pump increases the overall size of the fuel pump, requiring more space during installation and maintenance. Second, due to the distance between the jet pump and the fuel pump body, additional pressure loss may occur during fuel delivery, affecting fuel injection efficiency. Utility Model Content

[0003] In view of this, the utility model provides a multifunctional injection pump applied to a fuel pump.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A multifunctional jet pump for a fuel pump includes a fuel pump arranged in an oil storage barrel and a jet pump assembly arranged on the fuel pump, wherein the jet pump assembly is detachably arranged on the fuel pump, and the jet pump assembly has a fuel pump connection structure and an oil storage barrel connection structure, wherein the fuel pump connection structure is connected to the fuel pump to limit the longitudinal position of the jet pump assembly in the oil storage barrel, and the oil storage barrel connection structure is connected to the inner wall of the oil storage barrel to limit the radial position of the jet pump assembly in the oil storage barrel.

[0006] Preferably, the fuel pump connection structure is a clamping end protruding from the injection pump assembly, the cross-section of the clamping end is trapezoidal, the clamping end has a clamping surface, and the bottom end surface of the fuel pump is connected to the clamping surface.

[0007] Preferably, the oil storage barrel connection structure is a sheet-like positioning block protruding from the end face of the injection pump assembly away from the fuel pump, two reinforcing ribs protruding from the inner wall of the oil storage barrel, and positioning slots are formed between the reinforcing ribs. The sheet-like positioning block extends into the positioning slot and is connected to the oil storage barrel, and the positioning slot limits the radial position of the injection pump assembly in the oil storage barrel.

[0008] Preferably, the jet pump assembly includes a jet pump body, a tee and an oil pipe seat, the fuel pump connecting structure and the oil storage barrel connecting structure are both arranged on the jet pump body, the oil pipe seat is fixed to the top of the jet pump body, and an injection cavity is formed between the oil pipe seat and the jet pump body, the tee is fixed to the end of the oil pipe seat, and the interior of the tee is connected to the injection cavity.

[0009] Preferably, the injection chamber has a first air suction part, a diverter part and a second air suction part, the diverter part is provided with an oil inlet, a first diverter port and a second diverter port, the two ends of the oil inlet are connected to the diverter part and the interior of the oil storage barrel respectively, the diverter part is connected to the first air suction part and the second air suction part through the first diverter port and the second diverter port, the first air suction part is provided with a first oil supply port and a first air suction port, the second air suction part is provided with a second oil supply port and a second air suction port, oil is provided in the oil storage barrel, the oil enters the first air suction part and the second air suction part through the first air suction port and the second air suction port respectively, and the oil enters the interior of the oil storage barrel from the first oil supply port and the second oil supply port.

[0010] Preferably, the three-way pipe has an oil inlet end, an oil supply end and an oil outlet end, the oil pipe seat has a jet pump connecting part and a three-way pipe connecting part, the jet pump connecting part is connected to the jet pump body, the three-way pipe connecting part is connected to the three-way pipe, and an oil inlet hole is provided on the oil pipe seat, and the two ends of the oil inlet hole are respectively connected to the three-way pipe and the oil inlet.

[0011] The beneficial effect of the present invention is that by disassembling the jet pump assembly and installing it on the fuel pump, an integrated structure is formed between the jet pump and the fuel pump, thereby reducing the volume of the overall fuel pump assembly and reducing the distance of oil transportation, so that the fuel transportation efficiency is significantly improved. The setting of the fuel pump connection structure can limit the longitudinal position of the jet pump assembly in the oil storage barrel, ensuring that it remains stable during operation and avoiding position displacement due to vibration or impact. In addition, the setting of the oil storage barrel connection structure not only ensures that the radial position of the jet pump assembly in the oil storage barrel is fixed, but also enhances the sealing performance of the overall structure by closely fitting with the inner wall of the oil storage barrel, effectively preventing fuel leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Attachment Figure 1 This is a schematic diagram of the structure decomposition of the utility model;

[0014] Attachment Figure 2 For attachment Figure 1 Cross-sectional view;

[0015] Attachment Figure 3 For attachment Figure 2 Enlarged view of point A in the middle;

[0016] Attachment Figure 4A cross-sectional view of the injection pump assembly. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] The utility model provides the following technical solutions:

[0020] As attached Figure 1-4 As shown, the present invention discloses a multifunctional jet pump for use in a fuel pump, comprising a fuel pump 2 disposed within a fuel tank 1 and a jet pump assembly 3 disposed on the fuel pump 2. The jet pump assembly 3 is detachably mounted on the fuel pump 2 and comprises a fuel pump connection structure 4 and a fuel tank connection structure 5. The fuel pump connection structure 4, in contact with the fuel pump 2, defines the longitudinal position of the jet pump assembly 3 within the fuel tank 1. The fuel tank connection structure 5, in contact with the inner wall of the fuel tank 1, defines the radial position of the jet pump assembly 3 within the fuel tank 1. Specifically, in this design, the jet pump assembly 3 is detachably mounted on the fuel pump 2, forming an integrated structure with the fuel pump 2. This reduces the overall volume of the fuel pump 2 assembly and the distance required for oil delivery, significantly improving fuel delivery efficiency. The provision of the fuel pump connection structure 4 defines the longitudinal position of the jet pump assembly 3 within the fuel tank 1, ensuring its stability during operation and preventing positional displacement due to vibration or impact. In addition, the setting of the oil storage barrel connection structure 5 not only ensures that the radial position of the injection pump assembly 3 in the oil storage barrel 1 is fixed, but also enhances the sealing performance of the overall structure through close fit with the inner wall of the oil storage barrel 1, effectively preventing fuel leakage.

[0021] Furthermore, the fuel pump connection structure 4 is a snap-in end protruding from the jet pump assembly 3. The cross-sectional shape of the snap-in end is trapezoidal, and the snap-in end has a snap-in surface 6. The bottom end face of the fuel pump 2 is connected to the snap-in surface 6. Specifically, in this embodiment, the trapezoidal cross-sectional design of the snap-in end allows it to fit more closely with the bottom end face of the fuel pump 2, thereby improving the stability and reliability of the connection. The snap-in surface 6 has a large contact area with the bottom end face of the fuel pump 2, which can effectively disperse pressure, reduce local stress concentration, and further ensure the stability of the jet pump assembly 3 during operation. In addition, the structural design of the snap-in end also facilitates the disassembly and installation of the jet pump assembly 3, improving the convenience of maintenance.

[0022] Furthermore, the oil reservoir connection structure 5 comprises a sheet-shaped positioning block protruding from the end surface of the jet pump assembly 3 facing away from the fuel pump 2. Two reinforcing ribs 7 protrude from the inner wall of the oil reservoir 1, forming a positioning slot 8 between the ribs 7. The sheet-shaped positioning block extends into the positioning slot 8 to connect to the oil reservoir 1. The positioning slot 8 defines the radial position of the jet pump assembly 3 within the oil reservoir 1. Specifically, in this embodiment, the shape of the sheet-shaped positioning block matches the shape of the positioning slot 8, ensuring the precise positioning of the jet pump assembly 3 within the oil reservoir 1. This design not only improves the positioning accuracy of the assembly, but also, through the tight fit between the sheet-shaped positioning block and the positioning slot 8, further enhances the stability and sealing performance of the overall structure. Furthermore, the large contact area between the sheet-shaped positioning block and the positioning slot 8 effectively disperses pressure and reduces localized stress concentration, thereby ensuring the stability of the jet pump assembly 3 during operation. To further enhance system reliability, the two reinforcing ribs 7 on the inner wall of the oil reservoir 1 not only serve as a positioning function but also strengthen the structural strength of the oil reservoir 1. The presence of the reinforcement ribs 7 provides the oil storage barrel 1 with better stability when subjected to pressure and impact, thereby effectively preventing deformation or damage caused by external forces. At the same time, the design of the reinforcement ribs 7 also facilitates the manufacture and assembly of the oil storage barrel 1, improving production efficiency.

[0023] Furthermore, the jet pump assembly 3 includes a jet pump body 9, a tee pipe 10 and an oil pipe seat 11. The fuel pump connecting structure 4 and the oil storage barrel connecting structure 5 are both arranged on the jet pump body 9. The oil pipe seat 11 is fixed to the top of the jet pump body 9. An injection cavity is formed between the oil pipe seat 11 and the jet pump body 9. The tee pipe 10 is fixed to the end of the oil pipe seat 11, and the interior of the tee pipe 10 is connected to the injection cavity.

[0024] Furthermore, the injection chamber has a first air suction part 12, a diverter part 13 and a second air suction part 14, and the diverter part 13 is provided with an oil inlet 15, a first diverter port 16 and a second diverter port 17, and the two ends of the oil inlet 15 are respectively connected to the diverter part 13 and the interior of the oil storage barrel 1, and the diverter part 13 is connected to the first air suction part 12 and the second air suction part 14 through the first diverter port 16 and the second diverter port 17. The first air suction part 12 is provided with a first oil supply port 18 and a first air suction port 19, and the second air suction part 14 is provided with a second oil supply port 20 and a second air suction port 21. Oil is provided in the oil storage barrel 1, and the oil enters the first air suction part 12 and the second air suction part 14 through the first air suction port 19 and the second air suction port 21 respectively, and the oil enters the interior of the oil storage barrel 1 from the first oil supply port 18 and the second oil supply port 20. By providing the first air suction portion 12 and the second air suction portion 14, the fuel flowing through the first air suction portion 12 and the second air suction portion 14 can be subjected to an air suction effect after passing through the first air suction port 19 and the second air suction port 21, so that the fuel at the bottom of the oil storage barrel 1 is sucked into the oil storage barrel 1, so that the oil storage barrel 1 is always in a full oil state. The provision of the diverter portion 13 can divide the fuel at the oil inlet end 22 into two oil paths respectively leading to the first air suction portion 12 and the second air suction portion 14, thereby improving the oil filling rate.

[0025] Furthermore, the tee 10 has an oil inlet end 22, an oil supply end 23, and an oil outlet end 24. The distal oil supply pipe (not shown) is connected to the oil outlet end 24. The oil pipe seat 11 has a jet pump connection portion 26 and a tee connection portion 27. The jet pump connection portion 26 is connected to the jet pump body 9, and the tee connection portion 27 is connected to the tee 10. The oil pipe seat is provided with an oil inlet hole 28, and the two ends of the oil inlet hole 28 are respectively connected to the tee and the oil inlet 15. Specifically, in this embodiment, the provision of the oil pipe seat 11 enables the tee 10 and the jet pump body 9 to be connected and disassembled, thereby reducing damage to the tee and the jet pump body 9 during disassembly.

[0026] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multifunctional jet pump for a fuel pump, comprising a fuel pump disposed in an oil storage tank and a jet pump assembly disposed on the fuel pump, characterized in that: The fuel tank is connected to the fuel tank by a connecting rod, and the connecting rod is connected to the fuel tank by a connecting rod.

2. The multifunctional jet pump for fuel pump according to claim 1, characterized in that: The jet pump assembly includes a jet pump body, a tee and an oil pipe seat. The fuel pump connecting structure and the oil storage barrel connecting structure are both arranged on the jet pump body. The oil pipe seat is fixed to the top of the jet pump body. An injection cavity is formed between the oil pipe seat and the jet pump body. The tee is fixed to the top of the oil pipe seat. The interior of the tee is connected to the injection cavity.

3. The multifunctional jet pump for fuel pump according to claim 2, characterized in that: The injection chamber comprises a first air suction part, a diverter part and a second air suction part, an oil inlet, a first diverter part and a second diverter part are provided on the diverter part, and the two ends of the oil inlet are connected to the diverter part and the interior of the oil storage barrel respectively, the diverter part is connected to the first air suction part and the second air suction part through the first diverter part and the second diverter part, the first air suction part is provided with a first oil supply port and a first air suction port, the second air suction part is provided with a second oil supply port and a second air suction port, oil is provided in the oil storage barrel, the oil enters the first air suction part and the second air suction part through the first air suction port and the second air suction port respectively, and the oil enters the interior of the oil storage barrel from the first oil supply port and the second oil supply port.

4. The multifunctional injection pump for a fuel pump according to claim 2, characterized in that: The tee pipe has an oil inlet end, an oil supply end and an oil outlet end. The oil pipe seat has a jet pump connecting part and a tee pipe connecting part. The jet pump connecting part is connected to the jet pump body, and the tee pipe connecting part is connected to the tee pipe. An oil inlet hole is provided on the oil pipe seat, and the two ends of the oil inlet hole are respectively connected to the tee pipe and the oil inlet.

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