Mute fuel pressure control valve with high pressure stabilization performance

Abstract

The utility model relates to the technical field of oil pump pressure control valves, and discloses a high-pressure-stabilizing-performance mute fuel oil pressure control valve which comprises a valve seat, a sealing seat, a sealing ball, a guide sleeve and an elastic piece. A plurality of oil inlet holes which can be communicated with the oil inlet channel are formed in the top end of the guide sleeve; the guide sleeve sleeves the top end of the elastic piece; the diameter of the guide sleeve is matched with that of the valve cavity; the sealing ball abuts against the top end of the guide sleeve, and the elastic piece drives the guide sleeve to slide along the inner wall of the valve cavity and enables the sealing ball and the oil inlet channel to be dynamically sealed. The control valve has the following advantages: 1, on the basis of not increasing the structural complexity of the control valve, the internal structure of the existing control valve is improved, so that the problem of polarization at the upper end of an elastic piece of the existing control valve can be solved, and the noise influence of the control valve is thoroughly eliminated; and 2, the improved structure enables the steel ball to quickly and stably reset after single oil injection, and the oil inlet of the oil pump is sealed in time, so that a vehicle can be always and stably ignited.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pump pressure control valves, in particular to a high-stability silent fuel control valve for controlling a fuel engine. Background Art

[0002] Electronic fuel injection (EFI) control technology is increasingly being adopted in fuel engines such as automobiles and motorcycles. This technology uses electronic sensing to precisely control the amount of fuel injected using a computer, thereby achieving energy savings. The control of the fuel pump's oil volume requires a pressure regulating valve located in the fuel tank to precisely control the oil volume in the pipeline. However, existing control valves in the industry have always had noise issues.

[0003] The inventor's previously applied Chinese patent CN201811079868.X discloses a silent and improved control valve for an oil pump, comprising a valve seat, the valve seat being provided with a valve cavity and a mixing guide hole communicating with the valve cavity, a valve core, a sealing ball, and a push seat for pushing the sealing ball, wherein an elastic mechanism is provided in the valve cavity. Although a control valve of this structure can significantly reduce the original noise, after long-term use, it was found that the upper end of the spring inside the control valve is prone to twisting when oil passes through, resulting in a polarization problem, causing the control valve to still generate noise. This still cannot completely solve the noise problem of the control valve and cannot meet the driving requirements of existing vehicles, requiring further improvement. Utility Model Content

[0004] The purpose of the utility model is to provide a high-pressure-stabilizing silent fuel pressure control valve with the characteristic of reducing noise in view of the deficiencies in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model is a silent fuel pressure control valve with high pressure stability, comprising a valve seat and a sealing seat, wherein a valve cavity with an opening is provided inside the valve seat, and an oil outlet hole connected to the valve cavity is provided at the bottom end of the valve seat; the sealing seat is embedded in the open end of the valve cavity and is tightly matched with the valve cavity, and the sealing seat is also provided with an oil inlet channel; it also includes a sealing ball, a guide sleeve and an elastic member; the elastic member is arranged inside the valve cavity, and a plurality of oil inlet holes that can be connected to the oil inlet channel are provided at the top end of the guide sleeve, the guide sleeve is sleeved on the top end of the elastic member and the diameter of the guide sleeve is adapted to the valve cavity; the sealing ball abuts against the top end of the guide sleeve, and the elastic member drives the guide sleeve to slide along the inner wall of the valve cavity and enables the sealing ball to be dynamically sealed with the oil inlet channel; the end of the oil inlet channel is also provided with an arc-shaped expansion opening that cooperates with the sealing ball.

[0006] Optionally, a limiting step is provided inside the valve cavity, and the limiting step cooperates with the bottom end of the valve seat to form a receiving groove for limiting the bottom end of the elastic member; the oil outlet hole is provided at the center of the receiving groove.

[0007] Optionally, the limiting step is provided below the guide sleeve, and the limiting step can abut against the bottom end surface of the guide sleeve.

[0008] Optionally, the ratio of the limit step to the height of the valve cavity is 1:6.25.

[0009] Optionally, the top end of the guide sleeve is recessed inward to form an arc-shaped concave surface for accommodating the sealing ball; and the multiple oil inlet holes are evenly distributed around the arc-shaped concave surface.

[0010] Optionally, the guide sleeve includes a circular end plate and an annular side wall extending downward along the outer edge of the circular end plate, and the annular side wall is slidably connected to the side wall of the valve cavity.

[0011] Optionally, the oil inlet channel includes a first channel and a second channel that are interconnected; the diameter of the first channel is D1, the diameter of the second channel is D2, and D1<D2.

[0012] Optionally, an elastic sealing ring is further sleeved on the outer wall of the sealing seat.

[0013] Optionally, the sealing ball is a metal sphere.

[0014] Optionally, the guide sleeve is integrally injection-molded from a plastic material.

[0015] Beneficial effects: Compared with the prior art, the utility model is a high-pressure-stabilizing silent fuel pressure control valve, which has the following advantages:

[0016] 1. Without increasing the complexity of the control valve structure, the internal structure of the existing control valve is improved to solve the polarization problem of the upper end of the elastic member of the existing control valve and completely eliminate the noise impact of the control valve;

[0017] 2. The improved guide sleeve structure allows the steel ball to be more flexible and accurately reset after the engine is shut down and the oil pump stops running, significantly improving the sealing performance and allowing the oil circuit to maintain a high pressure for a long time, thus ensuring that the vehicle can always be stably ignited;

[0018] 3. The overall structure is simple and more stable;

[0019] 4. The oil inlet end of the pressure control valve is set on the guide sleeve and consists of four evenly distributed oil inlet holes. The guide sleeve structure can significantly reduce the fluctuation of oil pressure when the oil flow changes greatly, so that the oil circuit pressure remains stable, thereby making the electronic injection more accurate, improving the engine fuel efficiency and providing better power performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the overall longitudinal cross-sectional structure of the utility model.

[0022] Figure 3 This is a schematic diagram of the exploded structure of the present invention.

[0023] Figure 4 This is a schematic diagram of the internal structure of the valve seat of the present utility model.

[0024] Figure 5 It is a schematic diagram of the longitudinal cross-section structure of the guide sleeve of the present utility model.

[0025] Reference numerals include:

[0026] Valve seat--1, oil outlet hole--11, sealing seat--2, oil inlet channel--21, arc-shaped expansion opening--22, first channel--23, second channel--24, elastic sealing ring--25, valve chamber--3, limiting step--31, accommodating groove--32, sealing ball--4, guide sleeve--5, oil inlet hole--51, arc-shaped concave surface--52, circular end plate--53, annular side wall--54, elastic member--6. DETAILED DESCRIPTION

[0027] The following is combined with Figures 1 to 5 The utility model is described in detail.

[0028] The utility model is a high pressure stabilization performance silent fuel pressure control valve, such as Figure 1 As shown, it includes a valve seat 1 and a sealing seat 2, the valve seat 1 is provided with a valve cavity 3 with an opening, and the bottom end of the valve seat 1 is provided with an oil outlet hole 11 connected to the valve cavity 3; the sealing seat 2 is embedded in the open end of the valve cavity 3 and is tightly matched with the valve cavity 3, and the sealing seat 2 is also provided with an oil inlet channel 21; it also includes a sealing ball 4, a guide sleeve 5 and an elastic member 6; the elastic member 6 is arranged inside the valve cavity 3, and the top of the guide sleeve 5 is provided with a plurality of oil inlet holes 51 that can be connected to the oil inlet channel 21, the guide sleeve 5 is sleeved on the top of the elastic member 6 and the diameter of the guide sleeve 5 is adapted to the valve cavity 3; the sealing ball 4 abuts against the top of the guide sleeve 5, and the elastic member 6 drives the guide sleeve 5 to slide along the inner wall of the valve cavity 3 and enables the sealing ball 4 to be dynamically sealed with the oil inlet channel 21; the end of the oil inlet channel 21 is also provided with an arc-shaped expansion port 22 that cooperates with the sealing ball 4.

[0029] When the present technical solution is in use, the fuel of the oil pump flows into the interior of the control valve through the oil inlet channel 21, and the fuel pushes the sealing ball 4 to move downward to open the sealing port of the oil inlet channel 21. At this time, since the top end of the elastic member 6 is sleeved with a guide sleeve 5, the guide sleeve 5 and the side wall of the valve cavity 3 are in a sliding connection. Under the action of the guide sleeve 5, the deformation direction of the elastic member 6 is limited, and the elastic member 6 can only undergo longitudinal deformation. When the fuel flows from the oil inlet hole 51 through the elastic member 6, the resonance noise caused by the twisting of the elastic member 6 can be effectively prevented. Compared with the existing oil pump control valve, it can further eliminate the noise when the control valve is working, bringing a better driving experience to the vehicle. On the other hand, the improved structure can not only further optimize the performance of the control valve, but also has a simpler structure and lower manufacturing cost. The sealing ball 4 can be quickly and stably reset after a single injection, and the oil pump inlet can be sealed in time, thereby ensuring that the vehicle can always ignite stably and has higher stability; secondly, the oil inlet end of the control valve is improved to be arranged on the guide sleeve and consists of four oil inlet holes 51 evenly distributed on the guide sleeve 5, which has a diversion effect, and the amount of oil flowing into the control valve always remains stable, is less affected by the amount of oil, the injection pressure fluctuates less, and the injection is more stable; when using the existing control valve, the pressure difference range of multiple injection processes is 25~30kpa, and the control valve using this technical solution can control the pressure difference within the range of 15kpa, and the pressure difference can be reduced to 50% at most.

[0030] In this technical solution, the main source of noise generated when the control valve is working is related to the torsion of the elastic member 6. In order to further stabilize the elastic member 6, as shown in FIG. Figure 4 As shown, the valve chamber 3 is provided with a limiting step 31. This limiting step 31 cooperates with the bottom end of the valve seat 1 to form a receiving groove 32 for limiting the bottom end of the elastic member 6. The oil outlet 11 is located at the center of the receiving groove 32. The bottom end of the elastic member 6 is placed in the receiving groove 32. The receiving groove 32 cooperates with the guide sleeve 5 to minimize resonance problems of the elastic member 6 and completely eliminate noise.

[0031] In one embodiment, the limiting step 31 is provided below the guide sleeve 5 and can abut against the bottom end surface of the guide sleeve 5. When the guide sleeve 5 moves downward to the maximum deformation position of the elastic member 6, the guide sleeve 5 abuts against the limiting step 31, preventing the elastic member 6 from further deformation, thereby protecting the elastic member 6 and effectively extending its service life.

[0032] Preferably, the ratio of the height of the limiting step 31 to the height of the valve chamber 3 is 1:6.25. Tests have shown that the limiting step 31 at this ratio not only minimizes vibration at the bottom end of the elastic member 6 but also cooperates with the guide sleeve 5 to prevent excessive deformation of the elastic member 6.

[0033] Preferably, the top end of the guide sleeve 5 is recessed inward to form an arcuate concave surface 52 for accommodating the sealing ball 4. The arcuate concave surface 52 cooperates with the arcuate flare 22 of the sealing seat 2 to respectively abut the upper and lower ends of the sealing ball 4, so as to stably install the sealing ball 4 and prevent the sealing ball 4 from shaking inside the valve cavity 3; the multiple oil inlet holes 51 are evenly distributed around the arcuate concave surface 52. When the sealing ball 4 is separated from the arcuate flare 22, the fuel flows from the oil inlet channel 21 into the valve cavity 3 and flows from the oil inlet hole 51 to the oil outlet hole 11 at the bottom end of the valve seat 1.

[0034] In this technical solution, the number of oil inlet holes 51 can be set to four, six, or eight, etc., and the number can be set according to the actual size requirements of the oil pump. Specifically, when there are four oil inlet holes 51 and the diameter ratio of the oil inlet holes 51 to the oil outlet hole 11 is 1:3, the structure of the guide sleeve 5 is coordinated with the speed of oil inlet and outlet to achieve the best overall pressure stabilization performance and noise reduction effect.

[0035] In this technical solution, the guide sleeve 5 includes a circular end plate 53 and an annular side wall 54 extending downward along the outer edge of the circular end plate 53. The annular side wall 54 is slidingly connected to the side wall of the valve chamber 3, and the annular side wall 54 covers part of the elastic member 6, so that the guide sleeve 5 can completely cover the top of the elastic member 6, thereby ensuring that the elastic member 6 is always evenly stressed during movement and cannot generate resonance, thereby solving the noise problem of the control valve.

[0036] In the present invention, the oil inlet channel 21 is composed of a first channel 23 and a second channel 24, which are interconnected. The diameter of the first channel 23 is D1, and the diameter of the second channel 24 is D2, where D1 is less than D2. The oil inlet channel 21 is a variable diameter channel, with the diameter at the inlet end smaller than the diameter at the end. This controls the initial amount of fuel entering. After entering the first channel 23, the fuel flows along the sidewall into the second channel 24, providing more buffer time for the entire control valve. This, in conjunction with the oil inlet hole 51, reduces pressure fluctuations within the control valve, ensuring stable operation.

[0037] As an option, the outer wall of the sealing seat 2 is also sleeved with an elastic sealing ring 25. When the control valve is installed, the elastic sealing ring 25 can make the sealing seat 2 more tightly sealed when connected to the outside.

[0038] As an embodiment, in order to extend the service life of the sealing ball 4 and ensure the sealing performance of the sealing ball 4, the sealing ball 4 is made of metal material.

[0039] In the present technical solution, the guide sleeve 5 is integrally injection-molded from a plastic material, which makes the molding process of the guide sleeve 5 simpler and the molding efficiency higher.

[0040] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. A high-pressure-stabilizing, silent fuel pressure control valve, comprising a valve seat (1) and a sealing seat (2), characterized in that: The valve seat (1) is provided with a valve cavity (3) with an opening, and the bottom end of the valve seat (1) is provided with an oil outlet (11) communicating with the valve cavity (3); the sealing seat (2) is embedded in the open end of the valve cavity (3) and is tightly matched with the valve cavity (3), and the sealing seat (2) is also provided with an oil inlet channel (21); it also includes a sealing ball (4), a guide sleeve (5) and an elastic member (6); the elastic member (6) is provided in the interior of the valve cavity (3), and the top end of the guide sleeve (5) is provided with a plurality of An oil inlet hole (51) is connected to the oil inlet channel (21); a guide sleeve (5) is sleeved on the top of an elastic member (6) and the diameter of the guide sleeve (5) is adapted to the valve cavity (3); the sealing ball (4) abuts against the top of the guide sleeve (5); the elastic member (6) drives the guide sleeve (5) to slide along the inner wall of the valve cavity (3) and enables the sealing ball (4) to be dynamically sealed with the oil inlet channel (21); and an arc-shaped expansion opening (22) is further provided at the end of the oil inlet channel (21) to cooperate with the sealing ball (4).

2. A high pressure stabilization performance silent fuel pressure control valve according to claim 1, characterized in that: A limiting step (31) is provided inside the valve cavity (3), and the limiting step (31) cooperates with the bottom end of the valve seat (1) to form a receiving groove (32) for limiting the bottom end of the elastic member (6); the oil outlet hole (11) is provided at the center of the receiving groove (32).

3. The high-pressure-stabilizing, silent fuel pressure control valve according to claim 2, characterized in that: The limiting step (31) is arranged below the guide sleeve (5), and the limiting step (31) can abut against the bottom end surface of the guide sleeve (5).

4. A high pressure stabilization performance silent fuel pressure control valve according to claim 2, characterized in that: The ratio of the height of the limiting step (31) to the height of the valve cavity (3) is 1:6.

25.

5. The high pressure stabilization performance silent fuel pressure control valve according to claim 1, characterized in that: The top end of the guide sleeve (5) is recessed inward to form an arc-shaped concave surface (52) for accommodating the sealing ball (4); the multiple oil inlet holes (51) are evenly distributed around the arc-shaped concave surface (52).

6. The high pressure stabilization performance silent fuel pressure control valve according to claim 1, characterized in that: The guide sleeve (5) comprises a circular end plate (53) and an annular side wall (54) extending downward along the outer edge of the circular end plate (53), and the annular side wall (54) is slidably connected to the side wall of the valve cavity (3).

7. The high pressure stabilization performance silent fuel pressure control valve according to claim 1, characterized in that: The oil inlet channel (21) comprises a first channel (23) and a second channel (24) which are connected to each other; the diameter of the first channel (23) is D1, the diameter of the second channel (24) is D2, and D1 is less than D2.

8. The high pressure stabilization performance silent fuel pressure control valve according to claim 1, characterized in that: An elastic sealing ring (25) is also sleeved on the outer wall of the sealing seat (2).

9. The high pressure stabilization performance silent fuel pressure control valve according to claim 1, characterized in that: The sealing ball (4) is a metal sphere.

10. A high pressure stabilization performance silent fuel pressure control valve according to any one of claims 1 to 9, characterized in that: The guide sleeve (5) is integrally injection-molded from a plastic material.

Images