Fuel control valve of electric fuel injection pump

Abstract

The invention relates to the technical field of oil pump fuel control valves, and discloses an electric fuel injection pump fuel control valve which comprises a valve seat and a sealing seat, a valve cavity with an opening is formed in the middle of the valve seat, and the sealing seat is fixedly assembled at the opening end of the valve cavity; the invention has the following advantages: 1, the guide part is assembled in the valve cavity, and the guide handle of the guide part penetrates through the elastic part and is positioned through the middle positioning hole, so that the twisting phenomenon of the elastic part in the stretching and retracting process is effectively reduced, the noise of a vehicle engine is obviously reduced, and the purpose of reducing the noise of the vehicle is achieved; the guide piece is further provided with an end cover, twisting of the elastic piece is reduced, and noise of the control valve is lowered; and the elastic part can be driven to stably slide along the side wall of the valve cavity, so that the dynamic sealing process of the elastic assembly is more stable, the oil pressure fluctuation is small, the oil quantity control of vehicle electronic injection is more accurate, the unnecessary oil quantity waste can be effectively reduced, the purpose of saving oil is achieved, and the driving of the vehicle better conforms to the modern green and environment-friendly concept.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel control valves for oil pumps, and in particular to an electronically controlled fuel injection pump fuel control valve. Background Art

[0002] In the engines of existing fuel-powered vehicles such as automobiles and motorcycles, it is usually necessary to install an oil pump control valve in the oil pump to cooperate with the electronic fuel injection technology to control the single fuel injection volume of the oil pump and the pressure of the oil pump pipeline, etc. The structure of the oil pump control valve includes a valve seat and a sealing seat tightly assembled with the valve seat. At the same time, a spring and a steel ball are assembled in the inner cavity of the valve seat to achieve dynamic sealing of the valve cavity. However, it is found in actual use that during the compression and reset processes of the spring, it is extremely easy to twist. When the spring twists and collides with the valve cavity wall, polarized noise will be generated. Especially when the oil pump pressure is relatively high, the generated noise has seriously affected the normal use of the vehicle; on the other hand, the twisting of the spring will also cause unstable and untimely actions during its compression and reset processes, resulting in the valve cavity not being sealed or opened in time, and further causing large fluctuations in the oil pump pipeline pressure, which is extremely harmful to the oil pump. For this reason, the inventor has made a new invention. Summary of the Invention

[0003] The purpose of the present invention is to provide an electronically controlled fuel injection pump fuel control valve with the characteristics of silence and high pressure stability in view of the deficiencies of the prior art.

[0004] To achieve the above purpose, the present invention is an electronically controlled fuel injection pump fuel control valve, including a valve seat and a sealing seat. A valve cavity with an opening is provided in the middle of the valve seat. The sealing seat is fixedly assembled at the opening end of the valve cavity. The sealing seat is provided with an oil inlet hole, and the oil inlet hole communicates with the valve cavity; at the bottom of the valve seat, a central positioning hole and at least two oil outlet holes surrounding the central positioning hole are provided; the valve cavity includes a lower positioning cavity and an upper sliding cavity, and the diameter of the positioning cavity is smaller than that of the sliding cavity; an elastic component for dynamically sealing the oil inlet hole is further included. The elastic component is installed inside the valve cavity and is arranged between the oil inlet hole and the oil outlet hole. The elastic component at least includes a sealing sphere, a guide member, and an elastic member connected in sequence; one end of the elastic member is installed in the positioning cavity, and the other end extends into the sliding cavity; the guide member includes an end cover integrally connected with a guide handle. The end cover is sleeved on the top end of the elastic member, and the end cover is provided with at least two shunt holes for communicating the oil inlet hole and the oil outlet hole. The guide handle is inserted into the elastic member and extends out of the central positioning hole; the sealing sphere abuts against the top of the end cover and is located below the oil inlet hole; the end cover includes an end plate and an edge portion extending downward along the periphery of the end plate; the shunt holes are arranged on the end plate; the elastic member can drive the end cover to slide along the side wall of the sliding cavity and make the guide handle expand and contract along the central positioning hole, thereby driving the sealing sphere to dynamically seal the oil inlet hole.

[0005] Optionally, the distance between the elastic member and the side wall of the sliding cavity is D1; the thickness of the edge portion is D2; D1≥D2>0.7D1.

[0006] Optionally, a concave position adapted to the sealing sphere is further provided on the top surface of the end plate, and the shunt holes are distributed around the concave position.

[0007] Optionally, an accommodation position for accommodating the top end of the elastic member is formed between the end plate and the edge portion; the shunt holes are misaligned with the top end of the elastic member, and diversion pipes are downwardly extended from the shunt holes, and the plurality of diversion pipes divide the accommodation position to form a positioning area for positioning the elastic member.

[0008] Optionally, the diameter ratio value of the guiding handle to the central positioning hole is 0.90 - 0.99.

[0009] Optionally, a limiting platform is provided between the positioning cavity and the sliding cavity; the end surface of the limiting platform is inclined towards the direction close to the central axis of the positioning cavity.

[0010] Optionally, a flared flaring is provided below the oil inlet hole.

[0011] Optionally, the sealing sphere is a metal sphere.

[0012] Optionally, a sealing ring is sleeved outside the sealing seat.

[0013] Beneficial effects: Compared with the prior art, the present invention is an electronic fuel injection pump fuel control valve, including a valve seat and a sealing seat. A valve cavity with an opening is provided in the middle of the valve seat, and the sealing seat is fixedly assembled at the opening end of the valve cavity. The present invention has the following advantages: 1. A guiding member is assembled inside the valve cavity of the present invention. The guiding handle of the guiding member passes through the elastic member and is positioned by the central positioning hole, effectively reducing the twisting phenomenon of the elastic member during the telescopic process, and significantly reducing the polarization noise of the elastic member; 2. The guiding member is also provided with an end cover. The end cover can not only cooperate with the guiding handle to further limit the elastic member, reduce the twisting of the elastic member, and reduce the control valve noise; but also drive the elastic member to slide stably along the side wall of the valve cavity, making the dynamic sealing process of the elastic component more stable, the internal pressure of the valve cavity stable, the oil pressure fluctuation small, more conducive to extending the service life of the control valve, and also making the fuel injection amount control of the vehicle electronic injection more accurate, achieving the purpose of fuel saving, effectively reducing unnecessary fuel waste, and making the driving of the vehicle more in line with the concept of modern green environmental protection; 3. Improve the valve cavity structure, and divide the valve cavity structure into two cavity structures that can better limit the position of the elastic member; 4. The overall structure of the present invention is simple, the manufacturing cost is low, and it is more conducive to industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0015] Figure 2 Schematic diagram of the overall structure of the present invention from another perspective.

[0016] Figure 3 Schematic diagram of the sectional structure of the valve cavity of the present invention.

[0017] Figure 4 Schematic diagram of the exploded structure of the present invention.

[0018] Figure 5 Schematic diagram of the guide member structure of the present invention.

[0019] Figure 6 Schematic diagram of the flow guide pipe structure of the present invention.

[0020] Figure 7 Schematic diagram of the accommodation position structure of the present invention.

[0021] Figure 8 Schematic diagram of the internal structure of the valve seat of the present invention.

[0022] Figure 9 Schematic diagram of the specific identification of the distance D1 between the elastic member and the side wall of the sliding cavity and the thickness D2 of the edge portion of the present invention.

[0023] Reference numerals include:

[0024] Valve seat - 1, central positioning hole - 11, oil outlet hole - 12, sealing seat - 2, oil inlet hole - 21, flared mouth - 22, sealing ring - 23, valve cavity - 3, positioning cavity - 31, sliding cavity - 32, limiting platform - 33, elastic assembly - 4, sealing sphere - 41, guide member - 42, end cover - 421, guide handle - 422, shunt hole - 423, end plate - 424, edge portion - 425, concave position - 426, accommodation position - 427, flow guide pipe - 428, positioning area - 429, elastic member - 43. Detailed description of the specific implementation

[0025] The following will be combined with the attached Figures 1 to 9 to describe the present invention in detail.

[0026] The present invention relates to a fuel control valve for an electronic fuel injection pump, which comprises a valve seat 1 and a sealing seat 2. A valve cavity 3 with an opening is formed in the middle of the valve seat 1. The sealing seat 2 is fixedly assembled at the opening end of the valve cavity 3. The sealing seat 2 is provided with an oil inlet hole 21, and the oil inlet hole 21 communicates with the valve cavity 3. At the bottom of the valve seat 1, there is a central positioning hole 11 and at least two oil outlet holes 12 surrounding the central positioning hole 11. In the present invention, the optimal embodiment with four oil outlet holes 12 is adopted through experiments. The valve cavity 3 comprises a lower positioning cavity 31 and an upper sliding cavity 32, and the diameter of the positioning cavity 31 is smaller than that of the sliding cavity 32. It also includes an elastic component 4 for dynamically sealing the oil inlet hole 21. The elastic component 4 is installed inside the valve cavity 3 and is arranged between the oil inlet hole 21 and the oil outlet holes 12. The elastic component 4 at least includes a sealing sphere 41, a guiding component 42 and an elastic component 43 connected in sequence. Here, the elastic component 43 refers to a spring. One end of the elastic component 43 is installed in the positioning cavity 31, and the other end extends into the sliding cavity 32. The guiding component 42 includes an end cover 421 and a guiding handle 422 integrally connected. The end cover 421 is sleeved on the top end of the elastic component 43, and the end cover 421 is provided with at least two shunt holes 423 for communicating the oil inlet hole 21 and the oil outlet holes 12. In the present invention, the optimal embodiment with four shunt holes 423 is adopted through experiments. The guiding handle 422 is inserted into the elastic component 43 and extends out of the central positioning hole 11. The sealing sphere 41 abuts against the top of the end cover 421 and is located below the oil inlet hole 21 to seal the oil inlet hole 21. When starting or closing the valve, the elastic component 43 can drive the end cover 421 to slide along the side wall of the sliding cavity 32, and make the guiding handle 422 expand and contract along the central positioning hole 11, so as to drive the sealing sphere 41 to dynamically seal the oil inlet hole 21.

[0027] Compared with the traditional fuel control valve, the present invention has the following advantages: 1. In the present invention, a guiding component is assembled inside the valve cavity. The guiding handle of the guiding component passes through the elastic component and is positioned through the central positioning hole. By using the guiding handle to limit the expansion and contraction position of the elastic component, the torsion phenomenon of the elastic component during expansion and contraction is effectively reduced, and the polarization noise of the fuel control valve is significantly reduced. 2. The guiding component is also provided with an end cover. The end cover can not only cooperate with the guiding handle to further limit the elastic component, reduce the torsion of the elastic component and the noise of the control valve, but also drive the elastic component to slide stably along the side wall of the valve cavity, making the dynamic sealing process of the elastic component more stable, the internal pressure of the valve cavity stable, the oil pressure fluctuation small, which is more conducive to extending the service life of the control valve, and can also make the fuel injection amount control of the vehicle electronic fuel injection more accurate, effectively reduce unnecessary fuel waste, achieve the purpose of fuel saving, and make the vehicle driving more in line with the concept of modern green environmental protection. 3. Improve the valve cavity structure and divide the valve cavity structure into two cavity structures that can better limit the position of the elastic component. 4. The overall structure of the present invention is simple, the manufacturing cost is low, and it is more conducive to industrial production. [[ID=?]] [[ID=?]]

[0028] As an embodiment, the end cap 421 includes an end plate 424 and an edge portion 425 extending downward along the circumferential side of the end plate 424; the flow dividing holes 423 are provided in the end plate 424. When fuel enters the valve cavity 3 from the fuel inlet hole 21, the fuel pressure compresses the elastic member 43, and the edge portion 425 slides stably along the side wall of the valve cavity 3, and the fuel is output to the fuel outlet hole 12 through the flow dividing holes 423.

[0029] Preferably, as Figure 9 shown, the distance between the elastic member 43 and the side wall of the sliding cavity 32 is D1; the thickness of the edge portion 425 is D2; the length relationship is: D1≥D2>0.7D1. The thickness strength of the edge portion 425 within this quantitative relationship is sufficient to resist the pressure of fuel impact, ensuring that the edge portion 425 can slide stably along the side wall of the sliding cavity 32 to achieve the purpose of stabilizing the pressure in the valve cavity 3.

[0030] As Figure 5 shown, a spherical recess 426 adapted to the sealing sphere 41 is further provided on the top surface of the end plate 424, and the flow dividing holes 423 are circumferentially distributed around the recess 426. The recess 426 can effectively assist in stably connecting the sealing sphere 41 to the guide member 42.

[0031] As another embodiment, an accommodation position 427 for accommodating the top end of the elastic member 43 is formed between the end plate 424 and the edge portion 425; the flow dividing holes 423 and the top end of the elastic member 43 are misaligned to prevent the elastic member 43 from blocking the fuel from flowing out of the flow dividing holes 423; on the other hand, a flow guiding tube 428 is provided extending downward from each of the flow dividing holes 423 to guide the fuel to pass through the guide member 42 directionally and quickly. At the same time, the plurality of flow guiding tubes 428 divide the accommodation position 427 to form a positioning area 429 for positioning the elastic member 43, that is, the circumferential space between the flow guiding tubes 428 and the edge portion 425 is just used to clamp the top end of the elastic member 43, further reducing the polarization noise generated by the top of the elastic member 43 due to jitter.

[0032] Preferably, the diameter ratio of the guide handle 422 to the central positioning hole 11 is 0.90 - 0.99. Within this diameter ratio range, the guide handle 422 can maintain good axial movement while maximizing the limitation of the radial resonance of the guide handle 422.

[0033] Preferably, a limiting platform 33 is provided between the positioning cavity 31 and the sliding cavity 32; the end face of the limiting platform 33 is inclined towards the direction close to the central axis of the positioning cavity 31. The limiting platform 33 is used to limit the sliding range of the end cap 421. At the same time, the inclined table surface has a flow guiding effect to prevent fuel from accumulating on the limiting platform 33; in addition, the inclined table surface is also beneficial to the assembly of the elastic member 43.

[0034] Preferably, a flared opening 22 is provided below the oil inlet hole 21. The diameter of the flared opening 22 increases successively from top to bottom to form a conical surface, which is used to assist the accurate reset of the sealing sphere 41.

[0035] As an embodiment, the sealing sphere 41 is a metal sphere. The sealing sphere 41 made of this material can extend the service life and ensure the sealing performance of the sealing sphere 41.

[0036] As another embodiment, a sealing ring 23 is sleeved outside the sealing seat 2. When the control valve is installed, the use of the sealing ring 23 can make the sealing degree higher when the sealing seat 2 is connected to the peripheral device.

[0037] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. An electronically controlled fuel injection pump fuel control valve, comprising a valve seat (1) and a sealing seat (2), wherein a valve cavity (3) with an opening is formed in the middle of the valve seat (1), and the sealing seat (2) is fixedly assembled at the opening end of the valve cavity (3), and is characterized in that: The sealing seat (2) is provided with an oil inlet hole (21), and the oil inlet hole (21) communicates with the valve cavity (3); a central positioning hole (11) and at least two oil outlet holes (12) surrounding the central positioning hole (11) are provided at the bottom of the valve seat (1); the valve cavity (3) includes a lower positioning cavity (31) and an upper sliding cavity (32), and the diameter of the positioning cavity (31) is smaller than that of the sliding cavity (32). An elastic component (4) for dynamically sealing the oil inlet hole (21) is further included. The elastic component (4) is installed inside the valve cavity (3) and is disposed between the oil inlet hole (21) and the oil outlet holes (12). The elastic component (4) at least includes a sealing sphere (41), a guide member (42), and an elastic member (43) connected in sequence. One end of the elastic member (43) is installed in the positioning cavity (31), and the other end extends into the sliding cavity (32); the guide member (42) includes an end cover (421) and a guide handle (422) integrally connected. The end cover (421) is sleeved on the top end of the elastic member (43), and at least two flow dividing holes (423) for communicating the oil inlet hole (21) and the oil outlet holes (12) are provided on the end cover (421). The guide handle (422) is inserted into the elastic member (43) and extends out of the central positioning hole (11); the sealing sphere (41) abuts against the top of the end cover (421) and is located below the oil inlet hole (21). The end cover (421) includes an end plate (424) and an edge portion (425) extending downward along the circumferential side of the end plate (424); the flow dividing holes (423) are provided on the end plate (424). The elastic member (43) can drive the end cover (421) to slide along the side wall of the sliding cavity (32) and enable the guide handle (422) to telescopically move along the central positioning hole (11), thereby driving the sealing sphere (41) to dynamically seal the oil inlet hole (21).

2. The fuel control valve of an electronic fuel injection pump according to claim 1, characterized in that: The distance between the elastic member (43) and the side wall of the sliding cavity (32) is D1; the thickness of the edge portion (425) is D2; D1≥D2>0.7D1.

3. The fuel control valve of an electronic fuel injection pump according to claim 1, characterized in that: A concave position (426) adapted to the sealing sphere (41) is further provided on the top surface of the end plate (424), and the flow dividing holes (423) are distributed around the circumferential side of the concave position (426).

4. An electronic fuel injection pump fuel control valve according to claim 1, characterized in that: A receiving position (427) for receiving the top end of the elastic member (43) is formed between the end plate (424) and the edge portion (425); the flow dividing holes (423) are misaligned with the top end of the elastic member (43), and flow guiding pipes (428) are provided extending downward from the flow dividing holes (423). The plurality of flow guiding pipes (428) divide the receiving position (427) to form a positioning area (429) for positioning the elastic member (43).

5. The fuel control valve of an electronic fuel injection pump according to claim 1, wherein: The diameter ratio value of the guide handle (422) to the central positioning hole (11) is 0.90 to 0.

99.

6. The fuel control valve of an electronic fuel injection pump according to claim 1, wherein: A limiting platform (33) is provided between the positioning cavity (31) and the sliding cavity (32); the end face of the limiting platform (33) is inclined towards the direction close to the central axis of the positioning cavity (31).

7. The fuel control valve of an electronic fuel injection pump according to claim 1, characterized in that: A flared opening (22) is provided below the oil inlet hole (21).

8. The fuel control valve of an electronic fuel injection pump according to claim 1, wherein: The sealed sphere (41) is a metal sphere.

9. A fuel control valve for an electronic fuel injection pump according to any one of claims 1 to 8, characterized in that: A sealing ring (23) is sleeved outside the sealing seat (2).

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