Energy-saving and noise-reducing fuel pressure control valve

Abstract

The invention relates to the technical field of oil pump pressure control valves, and discloses an energy-saving noise-reduction fuel oil pressure control valve which comprises a valve seat and a sealing seat, a valve cavity with an opening is formed in the valve seat, and an oil outlet communicated with the valve cavity is formed in the bottom end of the valve seat; the device further comprises a sealing ball, a guide sleeve and an elastic piece. Compared with the prior art, the pressure control valve has the following advantages that on the basis that the structural complexity of the pressure control valve is not increased, the internal structure of an existing pressure control valve is improved, the problem of polarization of the upper end of an elastic piece of the existing pressure control valve can be solved, and noise pollution of the vehicle pressure control valve is thoroughly eliminated; and 2, due to the innovative guide sleeve structure, under the condition that the flow change of an oil way is large, the fluctuation of oil pressure is obviously reduced, and the pressure of the oil way is kept stable, so that the oil quantity control of electronic injection of the vehicle is more accurate, unnecessary oil quantity waste can be effectively reduced, the purposes of energy conservation and emission reduction are achieved, and the driving of the vehicle is more in line with the modern green and environment-friendly concept.

Description

Technical Field

[0001] The invention relates to the technical field of oil pump pressure control valves, and in particular to a high-stability, energy-saving and noise-reducing fuel pressure control valve for fuel engine control. Background Art

[0002] In fuel engines such as automobiles and motorcycles, more and more electronic fuel injection control technology is used. Since electronic fuel injection control technology uses electronic sensing to accurately control the amount of fuel injected by computer to achieve energy saving, the control of the oil pump oil volume requires a pressure regulating valve located in the fuel tank to accurately control the pressure of the pipeline. However, the existing pressure control valves in the industry always have noise problems.

[0003] The Chinese patent CN201811079868.X previously applied by the inventor discloses a silent improved control valve for an oil pump, including a valve seat, the valve seat is provided with a valve cavity and a mixing guide hole communicating with the valve cavity, and also includes a valve core, a sealing ball and a push seat for pushing the sealing ball, and the valve cavity is provided with an elastic mechanism. Although the pressure control valve of this structure can greatly reduce the original noise, it is found after long-term use that the spring inside the pressure control valve is prone to twisting at its upper end when the oil passes through, and there is a polarization problem, which causes the pressure control valve to still generate noise, and still cannot completely solve the noise problem of the pressure control valve, and cannot meet the driving requirements of existing vehicles, and further improvement is needed. Summary of the invention

[0004] The purpose of the present invention is to provide an energy-saving and noise-reducing fuel pressure control valve in view of the deficiencies in the prior art, which has the characteristic of reducing noise.

[0005] To achieve the above-mentioned purpose, the present invention is an energy-saving and noise-reducing fuel pressure control valve, 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 connected to the oil inlet channel are provided at the top end of the guide sleeve, and 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 matched with the sealing ball; the outer wall of the sealing seat is also sleeved with an elastic sealing ring.

[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; and the oil outlet hole is provided at the center of the receiving groove.

[0007] Optionally, the limiting step is arranged below the guide sleeve, and the limiting step can contact 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 a 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, the sealing ball is a metal sphere.

[0013] Optionally, the guide sleeve is integrally injection-molded from a plastic material.

[0014] Beneficial effects: Compared with the prior art, the present invention is an energy-saving and noise-reducing fuel pressure control valve, which has the following advantages:

[0015] 1. Without increasing the structural complexity of the pressure control valve, the internal structure of the existing pressure control valve is improved to solve the polarization problem of the upper end of the elastic part of the existing pressure control valve and completely eliminate the noise pollution of the pressure control valve;

[0016] 2. The improved guide sleeve structure allows the steel ball to be more flexible and accurately reset after the engine is turned off and the oil pump stops running, which significantly improves the sealing performance and enables the oil circuit to maintain a high pressure for a long time, thereby ensuring that the vehicle can always be stably ignited;

[0017] 3. The overall structure is simple and more stable;

[0018] 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 pressure remains stable, thereby making the electronic injection more accurate, improving the engine fuel efficiency and providing better power performance; and it can effectively reduce unnecessary oil waste, achieve the purpose of energy saving and emission reduction, and make the vehicle's driving more in line with the modern green and environmental protection concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall longitudinal cross-sectional structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the decomposition structure of the present invention.

[0022] Figure 4 It is a schematic diagram of the internal structure of the valve seat of the present invention.

[0023] Figure 5 It is a schematic diagram of the longitudinal cross-sectional structure of the guide sleeve of the present invention.

[0024] Reference numerals include:

[0025] 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 cavity--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

[0026] The following is combined with Figures 1 to 5 The present invention will be described in detail.

[0027] The present invention is an energy-saving and noise-reducing fuel pressure control valve. 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 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 arranged in the valve cavity 3, and the top end of the guide sleeve 5 is provided with a plurality of oil inlet holes 51 that can be connected with the oil inlet channel 21, the guide sleeve 5 is sleeved on the top end 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 end 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 makes the sealing ball 4 and the oil inlet channel 21 dynamically sealed; the end of the oil inlet channel 21 is also provided with an arc-shaped expansion 22 that cooperates with the sealing ball 4.

[0028] When the present technical solution is in use, the fuel of the oil pump flows into the interior of the pressure 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 chamber 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 pressure control valve, the noise during the operation of the pressure control valve can be further eliminated, bringing a better driving experience to the vehicle. On the other hand, the improved structure can not only further optimize the performance of the pressure 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, so as to ensure that the vehicle can always be stably ignited with higher stability; secondly, the oil inlet end of the pressure control valve is arranged on the guide sleeve 5 and is composed of four oil inlet holes 51 evenly distributed on the top of the guide sleeve 5, which has a diversion effect, and the structure of the guide sleeve 5 makes the oil circuit significantly reduce the fluctuation of oil pressure when the flow rate 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; when using the existing pressure control valve, the pressure difference range of multiple injection processes is 25~30kpa, and the pressure 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.

[0029] On the other hand, the control valve oil circuit pressure of the technical solution is more stable, which also makes the vehicle's electronic fuel injection oil control more precise, effectively reducing unnecessary oil waste, saving oil while reducing oil combustion, achieving the purpose of energy conservation and emission reduction, and making the vehicle's driving more in line with the new concept of modern green environmental protection.

[0030] In the present technical solution, the main source of noise generated when the pressure control valve is working is related to the torsion of the elastic member 6. In order to further stabilize the elastic member 6, as Figure 4 As shown, 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 11 is arranged at the center of the receiving groove 32. The bottom end of the elastic member 6 is placed in the receiving groove 32, and the receiving groove 32 cooperates with the guide sleeve 5 to maximize the prevention of the resonance problem of the elastic member 6 and completely eliminate the influence of noise.

[0031] As an embodiment, the limiting step 31 is disposed below the guide sleeve 5, and the limiting step 31 can contact 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 just abuts against the limiting step 31, preventing the elastic member 6 from further deformation, thereby protecting the elastic member 6 and effectively extending the service life of the elastic member 6.

[0032] Preferably, the ratio of the height of the limiting step 31 to the height of the valve cavity 3 is 1:6.25. According to experiments, the limiting step 31 at this ratio can not only limit the vibration of the bottom end of the elastic member 6 to the maximum extent, but also cooperate 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 expansion opening 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 expansion opening 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 the present technical solution, the number of the oil inlet holes 51 can be set to four, six or eight, etc., and the number can be set according to the actual requirements of the oil pump size. Among them, when the number of the oil inlet holes 51 is four, and the diameter ratio of the oil inlet hole 51 to the oil outlet hole 11 is 1:3, the guide sleeve 5 structure cooperates with the speed of the oil inlet and outlet to optimize the overall voltage stabilization performance and noise reduction effect.

[0035] In the present 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 slidably connected to the side wall of the valve chamber 3, and the annular side wall 54 covers a portion 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 pressure 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; wherein the diameter of the first channel 23 is D1, the diameter of the second channel 24 is D2, and D1<D2. The oil inlet channel 21 is a variable diameter channel, and the diameter of the oil inlet end is smaller than the diameter of the end end, so as to control the initial amount of fuel entering. After the fuel enters the first channel 23, it enters the second channel 24 along the side wall, giving the entire pressure control valve more buffer time, cooperating with the oil inlet hole 51, reducing the pressure fluctuation inside the pressure control valve, and ensuring that the pressure control valve can operate stably.

[0037] Preferably, the outer wall of the sealing seat 2 is also sleeved with an elastic sealing ring 25. When the pressure control valve is installed, the elastic sealing ring 25 can be used to 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, so that the molding process of the guide sleeve 5 is simpler and the molding efficiency is 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 will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. An energy-saving and noise-reducing 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 therein, and the bottom end of the valve seat (1) is provided with an oil outlet hole (11) which is in communication 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); the sealing seat (2) is also provided with an oil inlet passage (21); and further comprises a sealing ball (4), a guide sleeve (5) and an elastic member (6); the elastic member (6) is provided in the valve cavity (3), and the top end of the guide sleeve (5) is provided with a plurality of The oil inlet hole (51) is provided with a guide sleeve (5) sleeved on the top of the elastic member (6) and the diameter of the guide sleeve (5) is matched with the valve cavity (3); the sealing ball (4) is in contact with 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); the end of the oil inlet channel (21) is also provided with an arc-shaped expansion opening (22) matched with the sealing ball (4); the outer wall of the sealing seat (2) is also sleeved with an elastic sealing ring (25).

2. The energy-saving and noise-reducing fuel pressure control valve according to claim 1, characterized in that: A limiting step (31) is arranged 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 arranged at the center of the receiving groove (32).

3. The energy-saving and noise-reducing 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 contact the bottom end surface of the guide sleeve (5).

4. The energy-saving and noise-reducing 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 chamber (3) is 1:6.

25.

5. The energy-saving and noise-reducing 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 plurality of oil inlet holes (51) are evenly distributed around the arc-shaped concave surface (52).

6. The energy-saving and noise-reducing 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 downwardly 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 energy-saving and noise-reducing 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<D2.

8. The energy-saving and noise-reducing fuel pressure control valve according to claim 1, characterized in that: The sealing ball (4) is a metal sphere.

9. The energy-saving and noise-reducing fuel pressure control valve according to any one of claims 1 to 8, characterized in that: The guide sleeve (5) is integrally injection-molded from a plastic material.

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