Novel fuel pump oil supply device

Abstract

A novel fuel pump oil supply device comprises an oil storage barrel, a filter and a pump core, the filter comprises an upper cover and a filter element, the lower surface of the upper cover is provided with an annular partition plate which divides a cavity of the filter into an inner cavity and an outer cavity with the filter element, the inner cavity of the filter is communicated with the pump core, an oil outlet pipe is arranged at the position, corresponding to the inner cavity, of the upper cover of the filter, and an oil inlet is formed in the bottom of the oil storage barrel. The bottom of an inner cavity of the oil storage barrel is covered with a drainage cover on the upper side of the oil inlet, the two sides of the drainage cover are provided with an oil inlet pipe and an injection pipe, the pump core is communicated with the injection pipe, part of fuel oil output by the pump core is sprayed out at a high speed through the injection pipe, negative pressure is generated in the drainage cover, and the negative pressure effect can actively enhance the oil suction efficiency of the oil inlet. A pressure valve communicated with the inner cavity of the filter is further arranged on the upper cover of the filter, an oil return pipe communicated with the oil storage barrel is arranged on the pressure valve, and when a set value is exceeded, the pressure valve enables excess fuel oil to smoothly flow back to the oil storage barrel through the oil return pipe, so that the fuel supply pressure of a system is kept constant, and the fuel oil requirements of an engine under various working conditions are guaranteed.

Description

Technical Field

[0001] This utility model relates to a fuel pump, and more particularly to a novel fuel pump fuel supply device. Background Technology

[0002] The fuel pump is the core module of a car's fuel supply system, and its performance directly affects the engine's fuel supply efficiency, stability, and overall reliability. Currently, mainstream fuel pump assemblies typically integrate components such as the filter, pump, and pressure regulator into a single reservoir. However, common fuel pump assemblies still have some prevalent design and performance issues: 1. In low fuel levels or at low temperatures, traditional fuel pumps are prone to drawing in air bubbles or viscous fuel, leading to unstable fuel supply and affecting starting and operation; 2. Ordinary filters have limited filtration efficiency, and are often separate from the pressure regulator, resulting in a loose structure and a tendency to leak; 3. The fuel pump generates heat during operation; if heat dissipation is poor, the increased fuel temperature may cause vapor lock, reducing efficiency; 4. The internal component layout and connection methods are not optimized, making them prone to loosening or noise under prolonged vibration. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies and provide a novel fuel pump supply device with active diversion and high-efficiency filtration functions.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a novel fuel pump supply device, including a fuel tank, a filter and a pump core are provided inside the fuel tank, the filter includes a top cover and a filter element, the lower surface of the top cover is provided with an annular partition plate, the annular partition plate and the filter element divide the cavity of the filter into an inner cavity and an outer cavity, the inner cavity of the filter is connected to the pump core, the top cover of the filter is provided with an oil outlet pipe corresponding to the inner cavity, the fuel in the pump core is pumped into the filter, filtered by the filter element and sprayed out from the oil outlet pipe, the bottom of the fuel tank is provided with an oil inlet connected to the fuel tank, the bottom of the inner cavity of the fuel tank is covered with a drain cover above the oil inlet, the two sides of the drain cover are provided with an oil inlet pipe and an injection pipe respectively, the pump core is connected to the injection pipe, the fuel in the pump core is sprayed through the injection pipe to generate negative pressure in the drain cover, thereby enhancing the oil intake efficiency of the oil inlet, the top cover of the filter is also provided with a pressure valve connected to its inner cavity, the pressure valve is provided with a return oil pipe connected to the fuel tank.

[0005] With the above structure and an optimized filter, fuel is fully filtered by the filter element and pumped out through the outlet pipe, ensuring a high degree of cleanliness of the fuel entering the engine. The drain cap covers the fuel inlet, and its injection pipe is connected to the output end of the pump element. Part of the fuel output by the pump element is sprayed out at high speed through the injection pipe, generating negative pressure inside the drain cap. This negative pressure effect can actively enhance the fuel intake efficiency of the fuel inlet, especially when the fuel level is low or the fuel is viscous, effectively preventing pump element cavitation and ensuring continuous and stable fuel supply. When the system pressure exceeds the set value, the pressure valve will smoothly return the excess fuel to the fuel reservoir through the return pipe, thereby maintaining a constant system fuel supply pressure and ensuring the fuel needs of the engine under various operating conditions.

[0006] Preferably, the filter has a ring-shaped structure, with the pump core disposed inside the filter. A support base is located at the bottom of the filter, and the support base has an oil inlet corresponding to the pump core inlet. Brackets are located on both sides of the support base, and connecting blocks are located at both ends of the brackets. Connecting posts are located on both sides of the oil storage tank corresponding to the connecting blocks of the brackets, with the connecting blocks mounted on the connecting posts. This structure, with the filter designed as a ring and the pump core embedded within it, forms a compact "filtration-pumping" core module. Through the cooperation of the support base, brackets, connecting blocks, and connecting posts of the oil storage tank, the module is stably and precisely installed within the oil storage tank, enhancing the overall structural rigidity and reducing vibration and noise.

[0007] Preferably, the filter has a filter inlet pipe at the outer cavity of the upper cover, and the pump core has a first pump oil pipe and a second pump oil pipe. The first pump oil pipe is connected to the filter inlet pipe through a first corrugated pipe, and the second pump oil pipe is connected to the injection pipe through a second corrugated pipe.

[0008] Preferably, the pressure valve includes a valve body integrally formed with the filter's upper cover and a valve cover snapped onto the valve body. The filter's upper cover has a pressure inlet communicating with the valve body. The return oil pipe is disposed on the valve cover. A valve core is slidably disposed within the valve cavity formed between the valve body and the valve cover. The outer wall of the valve core extends outwardly and has a convex ring for separating the pressure inlet and the return oil pipe. A retaining ring with its two ends abutting against the convex ring and the valve cover is fitted on the side of the valve core facing the convex ring. A retaining ring and a sealing ring are fitted on the side of the valve core facing the convex ring facing the valve body. With the above structure, the pressure valve is directly integrally formed with the filter's upper cover, greatly reducing external pipelines and connectors, lowering the risk of leakage, simplifying the assembly process, and improving the system's sealing reliability and space utilization.

[0009] Preferably, the bottom outer surface of the oil storage tank is provided with heat dissipation fins and heat dissipation blocks for cooling the fuel inside the tank. This structure increases the heat exchange area with the outside environment, effectively accelerating the dissipation of heat generated by the fuel and pump during operation, preventing performance degradation or vapor lock due to excessively high fuel temperature, and improving the device's durability in high-temperature environments.

[0010] Preferably, a filter screen is provided on the lower side of the support base. The fuel in the oil tank enters the pump core after being filtered by the filter screen, and the area of ​​the filter screen is larger than the area of ​​the bottom of the oil tank. With the above structure, large particulate impurities are effectively intercepted through primary filtration by the large-area filter screen.

[0011] This invention achieves active flow diversion and efficient filtration, improving the quality and stability of oil supply. Its highly integrated and modular design enhances structural rigidity and reliability, optimizes heat dissipation and pressure regulation, and ensures the system's long-term and efficient operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0013] Figure 2 This is a top view of the filter of this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the filter of this utility model;

[0015] Figure 4 This is a bottom view of the oil storage tank of this utility model;

[0016] Figure 5 This is an installation diagram of the support base of this utility model;

[0017] Figure 6 This is a schematic diagram of the installation of the drainage cap of this utility model;

[0018] Figure 7 This is a schematic diagram of the structure of the filter cover of this utility model;

[0019] Figure 8 This is a cross-sectional view of the pressure valve of this utility model.

[0020] In the diagram: 1. Oil reservoir; 2. Filter; 3. Pump core; 4. Top cover; 5. Annular partition plate; 6. Oil outlet pipe; 7. Oil inlet; 8. Drain cover; 9. Oil inlet pipe; 10. Injection pipe; 11. Pressure valve; 12. Oil return pipe; 13. Support base; 14. Pump oil port; 15. Bracket; 16. Connecting block; 17. Connecting column; 18. Filter inlet pipe; 19. First pump oil pipe; 20. Second pump oil pipe; 21. First bellows; 22. Second bellows; 23. Valve body; 24. Valve cover; 25. Pressure inlet; 26. Valve core; 27. Convex ring; 28. Snap ring; 29. ​​Retaining ring; 30. Sealing ring; 31. Heat dissipation fins; 32. Heat dissipation block; 33. Filter screen. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0022] Example: Figures 1 to 8 The present invention discloses a novel fuel pump supply device, comprising a fuel tank 1, wherein a filter 2 and a pump core 3 are disposed within the fuel tank 1. The filter 2 has an annular structure, and the pump core 3 is disposed inside the filter 2. A support base 13 is provided at the bottom of the filter 2. A pump port 14 is provided on the support base 13 corresponding to the inlet of the pump core 3. Brackets 15 are provided on both sides of the support base 13, and connecting blocks 16 are provided at both ends of the brackets 15. Connecting posts 17 are provided on both sides of the fuel tank 1 corresponding to the connecting blocks 16 of the brackets 15. The connecting blocks 16 are disposed on the connecting posts 17. By designing the filter 2 as an annular structure and embedding the pump core 3 within it, a compact "filtration-pumping" core module is formed. Through the cooperation of the support base 13, brackets 15, connecting blocks 16 and connecting posts 17 of the fuel tank 1, the module is stably and precisely installed within the fuel tank 1, enhancing the overall structural rigidity and reducing vibration and noise.

[0023] The filter 2 includes an upper cover 4 and a filter element. The lower surface of the upper cover 4 is provided with an annular partition plate 5. The annular partition plate 5 and the filter element divide the cavity of the filter 2 into an inner cavity and an outer cavity. The inner cavity of the filter 2 is connected to the pump element 3. The upper cover 4 of the filter 2 is provided with an oil outlet pipe 6 corresponding to the inner cavity. The fuel in the pump element 3 is pumped into the filter 2, filtered by the filter element, and then sprayed out from the oil outlet pipe 6. Through the optimized design of the filter 2, the fuel is fully filtered by the filter element and then pumped out from the oil outlet pipe 6, ensuring the high cleanliness of the fuel entering the engine. The upper cover 4 of the filter 2 is provided with a filter inlet pipe 18 corresponding to the outer cavity. The pump element 3 is provided with a first pump oil pipe 19 and a second pump oil pipe 20. The first pump oil pipe 19 and the filter inlet pipe 18 are connected through a first corrugated pipe 21.

[0024] The bottom of the oil storage tank 1 is provided with an oil inlet 7 that connects to the oil tank. The bottom of the inner cavity of the oil storage tank 1 is covered with a drain cover 8 above the oil inlet 7. On both sides of the drain cover 8, there are oil inlet pipes 9 and injection pipes 10. The pump core 3 is connected to the injection pipe 10. The second pump oil pipe 20 is connected to the injection pipe 10 through the second corrugated pipe 22. After the fuel in the pump core 3 is injected through the injection pipe 10, a negative pressure is generated in the drain cover 8, thereby enhancing the oil intake efficiency of the oil inlet 7. The drain cover 8 covers the oil inlet 7, and its injection pipe 10 is connected to the output end of the pump core 3. Part of the fuel output by the pump core 3 is injected at high speed through the injection pipe 10, generating a negative pressure inside the drain cover 8. This negative pressure effect can actively enhance the oil suction efficiency of the oil inlet 7. Especially when the oil level is low or the fuel is viscous, it can effectively prevent the pump core 3 from sucking in air and cavitation, ensuring continuous and stable oil supply.

[0025] The filter 2's upper cover 4 is also equipped with a pressure valve 11 communicating with its inner cavity. The pressure valve 11 has a return oil pipe 12 communicating with the oil reservoir 1. When the system pressure exceeds a set value, the pressure valve 11 allows excess fuel to flow smoothly back to the oil reservoir 1 via the return oil pipe 12, thereby maintaining a constant system fuel supply pressure and ensuring the engine's fuel needs under various operating conditions. The pressure valve 11 includes a valve body 23 integrally formed with the filter 2's upper cover 4, and a valve cover 24 fastened to the valve body 23. The filter 2's upper cover 4 has a pressure inlet 25 communicating with the valve body 23. The return oil pipe 12 is located on the valve cover 24. A valve core 26 is slidably disposed within the valve cavity formed between valve body 23 and valve cover 24. The outer wall of valve core 26 extends outward to provide a convex ring 27 for separating pressure inlet 25 and return oil pipe 12. A retaining ring 28 is fitted on the side of valve core 26 facing valve cover 24, with its two ends respectively abutting against the convex ring 27 and valve cover 24. A retaining ring 29 and a sealing ring 30 are fitted on the side of valve core 26 facing valve body 23. Pressure valve 11 is directly integrally formed with filter 2 upper cover 4, which greatly reduces external pipelines and connectors, reduces leakage risk, simplifies assembly process, and improves system sealing reliability and space utilization.

[0026] The bottom outer surface of the oil storage tank 1 is provided with heat dissipation fins 31 and heat dissipation blocks 32 for dissipating heat from the fuel inside the oil storage tank 1. This increases the heat exchange area with the outside world, effectively accelerates the dissipation of heat generated by the fuel and pump body during operation, prevents the fuel temperature from being too high, which could lead to performance degradation or vapor lock, and improves the working durability of the device in high-temperature environments.

[0027] The support base 13 is provided with a filter screen 33 on its lower side. The fuel in the oil storage tank 1 enters the pump core 3 after being filtered by the filter screen 33. The area of ​​the filter screen 33 is larger than the area of ​​the bottom of the oil storage tank 1. Through the primary filtration of the large-area filter screen 33, large particulate impurities are effectively intercepted.

[0028] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A novel fuel pump oil supply device, comprising an oil storage bucket (1), a filter (2) and a pump core (3) are arranged in the oil storage bucket (1), characterized in that: The filter (2) comprises an upper cover (4), a filter element, and an annular partition plate (5) is arranged on the lower surface of the upper cover (4), the annular partition plate (5) and the filter element divide the cavity of the filter into an inner cavity and an outer cavity, the inner cavity of the filter (2) is communicated with the pump element (3), the upper cover (4) of the filter (2) is provided with an oil outlet pipe (6) corresponding to the inner cavity, the fuel pump in the pump element (3) is pumped into the filter (2), filtered by the filter element, and sprayed from the oil outlet pipe (6), the bottom of the oil storage bucket (1) is provided with an oil inlet (7) communicated with the oil tank, the bottom of the inner cavity of the oil storage bucket (1) is covered with a drainage cover (8) above the oil inlet (7), the two sides of the drainage cover (8) are provided with an oil inlet pipe (9) and a jet pipe (10) respectively, the pump element (3) is communicated with the jet pipe (10), the fuel in the pump element (3) is sprayed through the jet pipe (10), a negative pressure is generated in the drainage cover (8), and the oil inlet efficiency of the oil inlet (7) is improved, the upper cover (4) of the filter (2) is further provided with a pressure valve (11) communicated with the inner cavity thereof, and the pressure valve (11) is provided with an oil return pipe (12) communicated with the oil storage bucket (1).

2. The novel fuel pump oil supply device according to claim 1, characterized by: The filter (2) is of an annular structure, the pump element (3) is arranged on the inner side of the filter (2), the bottom of the filter (2) is provided with a supporting seat (13), the supporting seat (13) is provided with a pump oil inlet (14) corresponding to the inlet of the pump element (3), the two sides of the supporting seat (13) are provided with supports (15), the two ends of the supports (15) are provided with connecting blocks (16), the two sides of the oil storage bucket (1) are provided with connecting columns (17) corresponding to the connecting blocks (16) of the supports (15), and the connecting blocks (16) are arranged on the connecting columns (17).

3. The novel fuel pump oil supply device according to claim 1, characterized by: The upper cover (4) of the filter (2) is provided with a filter inlet pipe (18) corresponding to the outer cavity, the pump element (3) is provided with a first pump oil pipe (19) and a second pump oil pipe (20), the first pump oil pipe (19) is communicated with the filter inlet pipe (18) through a first corrugated pipe (21), and the second pump oil pipe (20) is communicated with the jet pipe (10) through a second corrugated pipe (22).

4. The novel fuel pump oil supply device according to claim 1, characterized by: The pressure valve (11) comprises a valve body (23) integrally formed with the upper cover (4) of the filter (2) and a valve cover (24) buckled on the valve body (23), the upper cover (4) of the filter (2) is provided with a pressure inlet (25) communicated with the valve body (23), the oil return pipe (12) is arranged on the valve cover (24), a valve core (26) is slidably arranged in a valve cavity formed between the valve body (23) and the valve cover (24), an outer wall of the valve core (26) is outwardly extended and provided with a convex ring (27) for separating the pressure inlet (25) and the oil return pipe (12), the valve core (26) is sleeved with a clamping spring (28) on the side of the convex ring (27) facing the valve cover (24), the two ends of the clamping spring (28) abut on the convex ring (27) and the valve cover (24) respectively, and the valve core (26) is sleeved with a check ring (29) and a sealing ring (30) on the side of the convex ring (27) facing the valve body (23).

5. The novel fuel pump oil supply device according to claim 1, characterized by: The bottom outer surface of the oil storage bucket (1) is provided with heat dissipation ribs (31) and heat dissipation blocks (32) for dissipating heat of fuel in the oil storage bucket (1).

6. The novel fuel pump oil supply device according to claim 2, characterized by: The lower side of the support seat (13) is provided with a filter screen (33), fuel in the oil storage bucket (1) is filtered by the filter screen (33) and then enters the pump core (3), and the area of the filter screen (33) is greater than the area of the bottom of the oil storage bucket (1).

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