Fuel pump assembly with oil outlet end fuel pressure stabilizing structure

Abstract

The utility model relates to a fuel pump assembly with fuel pressure stabilizing structure of oil outlet end, in order to make the remote end injection pump can normally work, fuel oil circuit necessarily has certain pressure to make the fuel that sprays from the oil nozzle on the remote end injection pump assembly has certain speed, through setting up stabilizing structure, the pressure valve in stabilizing structure can carry out stable regulation to the pressure of oil, ensure that the oil pressure that enters fine filter is moderate, neither because pressure is too high and damages fine filter, nor because pressure is too low and influences the normal work of remote end injection pump.

Description

Technical Field

[0001] This utility model relates to the field of fuel pump technology, specifically to a fuel pump assembly with a fuel pressure stabilization structure at the fuel outlet. Background Technology

[0002] In the prior art, during the fuel supply process, the fuel pump in the fuel pump assembly often causes large fluctuations in fuel pressure at the outlet due to the working characteristics of the fuel pump and the resistance of the fuel pipeline. This pressure fluctuation not only affects the fuel injection effect, but may also cause damage to the fuel pump and fuel system. Summary of the Invention

[0003] In view of this, the present invention provides a fuel pump assembly with a fuel pressure stabilization structure at the fuel outlet.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A fuel pump assembly with a fuel pressure stabilization structure at the fuel outlet includes a fuel pump and a fine filter. A pressure stabilizing structure is provided between the fuel pump and the fine filter. The pressure stabilizing structure includes a pressure stabilizing connecting sleeve and a pressure valve disposed within the pressure stabilizing connecting sleeve. The fuel pump and the fine filter are respectively provided with an outlet and an inlet. The pressure stabilizing connecting sleeve is provided with an inlet end and an outlet end corresponding to the outlet and inlet ends, respectively. The inlet end and the outlet end are respectively connected to the inlet and outlet ends. The fuel in the fuel pump enters the pressure stabilizing connecting sleeve through the outlet, and then enters the fine filter through the inlet end after passing through the pressure valve within the pressure stabilizing connecting sleeve.

[0005] Preferably, an oil passage is formed inside the pressure stabilizing sleeve, and the pressure valve is located inside the oil passage on the side near the fine filter. An oil inlet hole and an oil outlet hole communicating with the oil passage are respectively opened on the oil inlet end and the oil outlet end. The pressure stabilizing sleeve has a pump body connection part and a fine filter connection part, and the pump body connection part and the fine filter connection part are detachably connected to the fuel pump and the fine filter, respectively.

[0006] Preferably, the pump body connecting part includes a positioning connecting part and a snap-fit ​​connecting part. The positioning connecting part is annular and sleeved on the fuel pump. A snap-fit ​​end protrudes from the fuel pump. A snap-fit ​​groove is provided on the snap-fit ​​connecting part. The snap-fit ​​connecting end extends into the snap-fit ​​groove and snaps into the fuel pump.

[0007] Preferably, the fine filter connection part is a cover structure covering the top of the fine filter, the fine filter connection part is provided with a fine filter slot, and the outer wall of the fine filter protrudes to form a fine filter buckle end corresponding to the fine filter slot. The fine filter buckle end extends into the fine filter slot and is buckled to the fine filter connection part.

[0008] Preferably, the pressure valve includes a valve seat, a first valve core, and a second valve core. A valve core channel is formed inside the valve seat, and the second valve core is movably disposed inside the valve core channel. A valve seat port for oil flow is opened on the valve seat, and the first valve core is disposed outside the valve seat. One end of the first valve core extends into the valve core channel and abuts against the second valve core.

[0009] Preferably, the valve seat has a valve seat snap-fit ​​structure, which consists of several snap claws arranged radially on one side of the valve seat. The inner wall of the oil passage has corresponding snap-fit ​​openings for the snap claws, and the snap claws extend into the corresponding snap-fit ​​openings to snap and fix with the pressure stabilizing connecting sleeve.

[0010] Preferably, sealing ring grooves are provided on both sides of the valve seat, and an annular sealing ring is provided in the sealing ring groove. The annular sealing ring is in sealing contact with the valve seat and the inner wall of the oil passage.

[0011] The beneficial effects of this invention are as follows: To ensure the normal operation of the remote injection pump, a certain pressure is required in the fuel line to give the fuel injected from the injectors on the remote injection pump assembly a certain velocity. By setting up a pressure stabilizing structure, the pressure valve within the pressure stabilizing structure can stably regulate the fuel pressure, ensuring that the fuel pressure entering the fine filter is moderate. This prevents damage to the fine filter due to excessive pressure, and also prevents the remote injection pump from operating normally due to insufficient pressure. Simultaneously, the design of the pressure stabilizing connector makes the connection between the fuel pump and the fine filter tighter and more reliable, reducing the risk of fuel leakage and improving the overall performance of the fuel pump assembly. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Appendix Figure 1 This is a schematic diagram of the fuel pump assembly; Appendix Figure 2 A schematic diagram showing the connection between the pressure stabilizing structure and the fuel pump and fine filter; Appendix Figure 3 For the appendix Figure 2 Structural breakdown diagram; Appendix Figure 4 For the appendix Figure 3 Another angle diagram; Appendix Figure 5 This is a partial sectional view of the fuel pump assembly; Appendix Figure 6 This is a schematic diagram of a pressure valve; Appendix Figure 7 This is a schematic diagram of the pressure valve disassembled. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] The present invention will now be further described with reference to the accompanying drawings.

[0016] This utility model provides the following technical solution: As attached Figure 1-7As shown, this utility model discloses a fuel pump assembly with a fuel pressure stabilization structure at the fuel outlet, including a fuel pump 1 and a fine filter 2. A pressure stabilizing structure 3 is provided between the fuel pump 1 and the fine filter 2. The pressure stabilizing structure 3 includes a pressure stabilizing connecting sleeve 4 and a pressure valve 5 disposed within the pressure stabilizing connecting sleeve 4. The fuel pump 1 and the fine filter 2 are respectively provided with an outlet 6 and an inlet 7. The pressure stabilizing connecting sleeve 4 is provided with an inlet end 8 and an outlet end 9 corresponding to the outlet 6 and the inlet end 7, respectively. The inlet end 8 and the outlet end 9 are respectively connected to the inlet end 7 and the outlet end 6. The fuel in the fuel pump 1 enters the pressure stabilizing connecting sleeve 4 through the outlet 6, and then enters the fine filter 2 through the inlet 7 after passing through the pressure valve 5 within the pressure stabilizing connecting sleeve 4. Specifically, in this design, to ensure the remote injection pump functions properly, a certain pressure is required in the fuel line to give the fuel injected from the injectors on the remote injection pump assembly a certain velocity. By setting up a pressure stabilizing structure 3, the pressure valve 5 within it can stably regulate the fuel pressure, ensuring that the fuel pressure entering the fine filter 2 is appropriate. This prevents damage to the fine filter 2 due to excessive pressure, and also prevents disruption of the remote injection pump's normal operation due to insufficient pressure. Simultaneously, the design of the pressure stabilizing connecting sleeve 4 makes the connection between the fuel pump 1 and the fine filter 2 more secure and reliable, reducing the risk of fuel leakage and improving the overall performance of the fuel pump 1 assembly. In this design, the pressure valve 5 is positioned close to the fuel pump 1 outlet 6, shortening the distance between them. This results in a shorter fuel flow path, lower flow resistance, and a smaller pressure drop, effectively improving the efficiency of converting pressure energy into kinetic energy and reducing the energy consumption of the fuel pump 1. Furthermore, in this design, the pressure valve 5 acts as a one-way valve, allowing fuel to flow only from the fuel pump 1 to the fine filter 2, preventing backflow and further ensuring the stability and reliability of the fuel pump 1 assembly. In addition, the design of the pressure regulating structure 3 facilitates later maintenance and replacement. When the pressure valve 5 malfunctions or requires repair, only the pressure regulating connector 4 needs to be removed, without disassembling the entire fuel pump 1 assembly, greatly improving the convenience and efficiency of maintenance.

[0017] Furthermore, an oil passage 10 is formed within the pressure-stabilizing connecting sleeve 4. The pressure valve 5 is located inside the oil passage 10 near the fine filter 2. An inlet hole 11 and an outlet hole (not shown) communicating with the oil passage 10 are respectively provided on the inlet end 8 and the outlet end 9. The pressure-stabilizing connecting sleeve 4 has a pump body connecting part 13 and a fine filter connecting part 14, which are detachably connected to the fuel pump 1 and the fine filter 2, respectively. Specifically, in this embodiment, the pump body connecting part 13 includes a positioning connecting part 22 and a snap-fit ​​connecting part 23. The positioning connecting part 22 is annularly sleeved on the fuel pump 1. A snap-fit ​​end 24 protrudes from the fuel pump 1. A snap-fit ​​groove 25 is provided on the snap-fit ​​connecting part 23, and the snap-fit ​​connecting end extends into the snap-fit ​​groove 25 to snap-fit ​​with the fuel pump 1. This structural design makes the connection between the fuel pump 1 and the pressure-stabilizing connecting sleeve 4 more stable and facilitates disassembly and maintenance. Meanwhile, the design of the positioning connection ensures the coaxiality between the fuel pump 1 and the pressure regulating sleeve 4, avoiding fuel leakage or pressure instability caused by connection misalignment. Furthermore, the fine filter connection 14 also features a detachable design, facilitating the replacement or maintenance of the fine filter 2 and improving the maintainability of the fuel pump 1 assembly. The overall design of the pressure regulating structure 3 not only guarantees fuel pressure stability but also enhances the reliability and service life of the fuel pump 1 assembly.

[0018] Furthermore, the fine filter connection part 14 is a cover-shaped structure covering the top of the fine filter 2. A fine filter slot 15 is formed on the fine filter connection part 14, and a fine filter snap-fit ​​end 16 protrudes from the outer wall of the fine filter 2 corresponding to the fine filter slot 15. The fine filter snap-fit ​​end 16 extends into the fine filter slot 15 and snaps into the fine filter connection part 14. Specifically, in this embodiment, the cover-shaped structure design of the fine filter connection part 14 not only facilitates quick connection with the fine filter 2, but also achieves a stable installation of the fine filter 2 through the cooperation of the slot and the snap-fit ​​end. This snap-fit ​​connection method eliminates the need for additional fasteners, simplifying the installation steps and improving assembly efficiency. Simultaneously, the tight fit between the fine filter connection part 14 and the fine filter 2 effectively prevents oil leakage at the connection point, further improving the sealing performance of the fuel pump 1 assembly.

[0019] Furthermore, the pressure valve 5 includes a valve seat 17, a first valve core 26, and a second valve core 27. A valve core channel 28 is formed within the valve seat 17. The second valve core 27 is movably disposed within the valve core channel 28. A valve seat port (not shown) is provided on the valve seat to allow oil to flow to 10. The first valve core 26 is disposed outside the valve seat, with one end extending into the valve core channel 28 and abutting against the second valve core 27. Specifically, in this embodiment, the first valve core 26 moves towards the second valve core 27 under the push of the oil, thereby adjusting the opening of the valve seat port and achieving precise control of the oil pressure. The interaction between the first and second valve cores 26, and the sliding of the second valve core 27 within the valve core channel 28, together constitute the pressure regulating function of the pressure valve. When the oil pressure in the fuel pump rises, the first valve core 26 is pushed by the oil and moves towards the second valve core 27, causing the opening of the valve seat port to decrease.

[0020] Furthermore, the valve seat 17 has a valve seat snap-fit ​​structure 18, which consists of several snap-fit ​​claws arranged radially on one side of the valve seat 17. The inner wall of the oil passage 10 has corresponding slots 19 for the snap-fit ​​claws, and the snap-fit ​​claws extend into the corresponding slots 19 to snap and fix with the pressure stabilizing sleeve 4. Specifically, in this embodiment, the design of the valve seat snap-fit ​​structure 18 ensures that the pressure valve 5 can be securely installed in the oil passage 10, preventing it from easily falling off or loosening. The radial arrangement of the snap-fit ​​claws evenly distributes pressure, ensuring the stability of the pressure valve 5 within the oil passage 10. Simultaneously, the cooperation between the snap-fit ​​claws and the slots 19 enables a quick connection between the pressure valve 5 and the pressure stabilizing sleeve 4, eliminating the need for additional fasteners, simplifying the installation process, and improving assembly efficiency.

[0021] Furthermore, sealing ring grooves 20 are formed on both sides of the valve seat 17, and an annular sealing ring 21 is provided in the sealing ring groove 20. The annular sealing ring 21 is in sealing contact with the valve seat 17 and the inner wall of the oil passage 10. Specifically, in this embodiment, the design of the sealing ring groove 20 and the annular sealing ring 21 further enhances the sealing performance between the pressure valve 5 and the oil passage 10, effectively preventing oil leakage at the installation location of the pressure valve 5. The annular sealing ring 21 has good elasticity and wear resistance, and can adapt to changes in oil pressure and temperature, maintaining a long-term sealing effect. At the same time, the setting of the sealing ring groove 20 also facilitates the installation and replacement of the annular sealing ring 21, improving the maintainability of the fuel pump 1 assembly. This design not only ensures the stability and reliability of the fuel pump 1 assembly under normal operating conditions, but also maintains the stability of fuel pressure under extreme operating conditions, such as when the oil pressure suddenly rises or falls, ensuring the normal operation of the fuel pump 1 assembly.

[0022] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those 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 to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fuel pump assembly with a fuel outlet pressure stabilization structure, comprising a fuel pump and a fine filter, characterized in that: A pressure stabilizing structure is provided between the fuel pump and the fine filter. The pressure stabilizing structure includes a pressure stabilizing connecting sleeve and a pressure valve disposed within the pressure stabilizing connecting sleeve. The fuel pump and the fine filter are respectively provided with an oil outlet and an oil inlet. The pressure stabilizing connecting sleeve is provided with an oil inlet end and an oil outlet end corresponding to the oil outlet and the oil inlet end. The oil in the fuel pump enters the pressure stabilizing connecting sleeve through the oil outlet, and then enters the fine filter through the oil inlet after passing through the pressure valve within the pressure stabilizing connecting sleeve.

2. The fuel pump assembly with a fuel outlet pressure stabilization structure according to claim 1, characterized in that: An oil passage is formed inside the pressure stabilizing sleeve. The pressure valve is located inside the oil passage on the side near the fine filter. An oil inlet hole and an oil outlet hole that communicate with the oil passage are respectively opened on the oil inlet end and the oil outlet end. The pressure stabilizing sleeve has a pump body connection part and a fine filter connection part. The pump body connection part and the fine filter connection part are detachably connected to the fuel pump and the fine filter, respectively.

3. The fuel pump assembly with a fuel outlet pressure stabilization structure according to claim 2, characterized in that: The pump body connection includes a positioning connection and a snap-fit ​​connection. The positioning connection is annular and sleeved on the fuel pump. A snap-fit ​​end protrudes from the fuel pump. A snap-fit ​​groove is provided on the snap-fit ​​connection. The snap-fit ​​connection end extends into the snap-fit ​​groove and snaps into the fuel pump.

4. The fuel pump assembly with a fuel outlet pressure stabilization structure according to claim 2, characterized in that: The fine filter connection part is a cover structure covering the top of the fine filter. A fine filter slot is opened on the fine filter connection part. A fine filter buckle end is formed by protruding on the outer wall of the fine filter corresponding to the fine filter slot. The fine filter buckle end extends into the fine filter slot and is buckled and connected to the fine filter connection part.

5. The fuel pump assembly with a fuel outlet pressure stabilization structure according to claim 2, characterized in that: The pressure valve includes a valve seat, a valve core one, and a valve core two. A valve core channel is formed inside the valve seat. The valve core two is movably disposed inside the valve core channel. A valve seat port for oil flow is opened on the valve seat. The valve core one is disposed outside the valve seat, and one end of the valve core one extends into the valve core channel and abuts against the valve core two.

6. The fuel pump assembly with a fuel pressure stabilization structure at the outlet end according to claim 5, characterized in that: The valve seat has a valve seat snap-fit ​​structure, which consists of several snap claws arranged radially on one side of the valve seat. The inner wall of the oil passage has corresponding snap-fit ​​openings for the snap claws, and the snap claws extend into the corresponding snap-fit ​​openings to snap and fix with the pressure stabilizing connecting sleeve.

7. The fuel pump assembly with a fuel pressure stabilization structure at the outlet end according to claim 5, characterized in that: Sealing ring grooves are provided on both sides of the valve seat, and an annular sealing ring is provided in the sealing ring groove. The annular sealing ring is in sealing contact with the valve seat and the inner wall of the oil passage.

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