Control valve of electric fuel injection pump

Abstract

The utility model relates to the technical field of oil pump control valves, and discloses an electric fuel injection pump 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 utility model has the following advantages: 1, the guide piece is assembled in the valve cavity, and the guide handle of the guide piece penetrates through the elastic piece and is positioned through the middle positioning hole, so that the twisting phenomenon of the elastic piece in the stretching and retracting process is effectively reduced, and the polarization noise of the elastic piece is obviously reduced; the guide piece is further provided with an end cover, the end cover can be matched with the guide handle to further limit the elastic piece, twisting of the elastic piece is reduced, and noise of the control valve is lowered; and the elastic piece 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 internal pressure of the valve cavity is stable, the oil pressure fluctuation is small, and the service life of the control valve is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of oil pump control valve technology, and in particular to an electronic fuel injection pump control valve. Background Technology

[0002] In existing engines of gasoline-powered vehicles such as automobiles and motorcycles, a fuel pump control valve is typically installed in the fuel pump to work with electronic fuel injection technology, controlling the amount of fuel injected per cycle and the pressure in the fuel pump line. The fuel pump control valve consists of a valve seat and a sealing seat tightly fitted to it. A spring and a steel ball are installed inside the valve seat to achieve dynamic sealing of the valve cavity. However, in actual use, it has been found that the spring is prone to twisting during compression and reset. This spring twisting and collision with the valve cavity wall generates polarized noise, which, especially at high fuel pump pressures, severely affects the normal operation of the vehicle. Furthermore, the spring twisting also leads to unstable and untimely action during compression and reset, preventing the valve cavity from being sealed or opened in a timely manner. This results in large fluctuations in fuel pump line pressure, causing significant damage to the fuel pump. Therefore, the inventor has developed a new invention. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an electronic fuel injection pump control valve that features quiet operation and high pressure stability.

[0004] To achieve the above objectives, this utility model provides an electronic fuel injection pump control valve, comprising a valve seat and a sealing seat. The valve seat has an open valve cavity in its center, and the sealing seat is fixedly mounted to the open end of the valve cavity. The sealing seat has an oil inlet hole that communicates with the valve cavity. The bottom of the valve seat has a central positioning hole and at least two oil outlet holes surrounding the central positioning hole. The valve cavity includes a lower positioning cavity and an upper sliding cavity, with the diameter of the positioning cavity being smaller than the diameter of the sliding cavity. It also includes an elastic component for dynamically sealing the oil inlet hole, the elastic component being installed inside the valve cavity and positioned between the oil inlet hole and the oil outlet hole. The elastic component comprises at least a sealing ball, a guide, and an elastic element connected in sequence; one end of the elastic element is installed in the positioning cavity, and the other end extends into the sliding cavity; the guide includes an end cap and a guide handle integrally connected, the end cap is sleeved on the top of the elastic element and the end cap is provided with at least two diversion holes for connecting the oil inlet and the oil outlet, the guide handle is inserted into the elastic element and extends out of the central positioning hole; the sealing ball abuts against the top of the end cap and is located below the oil inlet; the elastic element can drive the end cap to slide along the side wall of the sliding cavity and cause the guide handle to extend and retract along the central positioning hole, thereby driving the sealing ball to dynamically seal the oil inlet.

[0005] Optionally, the end cap includes an end plate and an edge extending downward along the periphery of the end plate; the diversion hole is disposed on the end plate.

[0006] Optionally, the distance between the elastic element and the sidewall of the sliding cavity is D1; ​​the thickness of the edge portion is D2; and D1 ≥ D2 > 0.7D1.

[0007] Optionally, the top surface of the end plate is also provided with a recess that matches the sealing sphere, and the diversion holes are distributed around the periphery of the recess.

[0008] Optionally, the end plate and the edge portion form a receiving position for accommodating the top end of the elastic element; the diversion holes are staggered with the top end of the elastic element, and each diversion hole extends downward with a guide tube, the plurality of guide tubes dividing the receiving position into a positioning area for positioning the elastic element.

[0009] Optionally, the diameter ratio of the guide shank to the central positioning hole is 0.90 to 0.99.

[0010] Optionally, a limiting stage is provided between the positioning cavity and the sliding cavity; the end face of the limiting stage is inclined towards the central axis of the positioning cavity.

[0011] Optionally, a flared opening is provided below the oil inlet.

[0012] Optionally, the sealing sphere is a metal sphere.

[0013] Optionally, a sealing ring is fitted onto the outer side of the sealing seat.

[0014] Beneficial Effects: Compared with the prior art, this utility model is an electronic fuel injection pump control valve, including a valve seat and a sealing seat. The valve seat has an open valve cavity in the middle, and the sealing seat is fixedly assembled to the open end of the valve cavity. This utility model has the following advantages: 1. This utility model assembles a guide member inside the valve cavity. The guide handle of the guide member passes through the elastic member and is positioned through the central positioning hole, effectively reducing the twisting phenomenon of the elastic member during the extension and contraction process, and significantly reducing the polarization noise of the elastic member; 2. The guide member is also provided with an end cap. The end cap can cooperate with the guide handle to further limit the elastic member, reduce the twisting of the elastic member, and reduce the noise of the control valve; it can 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, and more conducive to extending the service life of the control valve; 3. The valve cavity structure is improved by dividing the valve cavity structure into a two-cavity structure that can better limit the position of the elastic member; 4. The overall structure of this utility model is simple, the manufacturing cost is low, and it is more conducive to industrial production. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2This is a schematic diagram of the overall structure of this utility model from another perspective.

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the valve cavity of this utility model.

[0018] Figure 4 This is an exploded structural diagram of the present invention.

[0019] Figure 5 This is a schematic diagram of the guide component structure of this utility model.

[0020] Figure 6 This is a schematic diagram of the flow guide tube structure of this utility model.

[0021] Figure 7 This is a schematic diagram of the accommodating position structure of this utility model.

[0022] Figure 8 This is a schematic diagram of the internal structure of the valve seat of this utility model.

[0023] Figure 9 This is a schematic diagram showing the specific markings of the distance D1 between the elastic element and the side wall of the sliding cavity, and the thickness D2 of the edge portion of this utility model.

[0024] The reference numerals in the figures include:

[0025] Valve seat--1, central positioning hole--11, oil outlet hole--12, sealing seat--2, oil inlet hole--21, flared opening--22, sealing ring--23, valve cavity--3, positioning cavity--31, sliding cavity--32, limiting platform--33, elastic component--4, sealing ball--41, guide--42, end cap--421, guide handle--422, diversion hole--423, end plate--424, edge portion--425, recess--426, receiving position--427, guide tube--428, positioning area--429, elastic component--43. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1 to 9 This utility model will be described in detail.

[0027] This utility model relates to an electronic fuel injection pump control valve, comprising a valve seat 1 and a sealing seat 2. The valve seat 1 has an open valve cavity 3 in its center. The sealing seat 2 is fixedly mounted to the open end of the valve cavity 3. The sealing seat 2 has an oil inlet 21 communicating with the valve cavity 3. The bottom of the valve seat 1 has a central positioning hole 11 and at least two oil outlet holes 12 surrounding the central positioning hole 11. This utility model adopts an optimal four-outlet-hole embodiment after testing. The valve cavity 3 includes a lower positioning cavity 31 and an upper sliding cavity 32, with the diameter of the positioning cavity 31 being smaller than the diameter 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 positioned between the oil inlet hole 21 and the oil outlet holes 12. The elastic component 4 includes at least a sealing ball 41, a guide 42, and a... connected in sequence. The elastic element 43, here referring to a spring, is installed at one end in the positioning cavity 31 and extends into the sliding cavity 32 at the other end. The guide element 42 includes an integrally connected end cap 421 and guide handle 422. The end cap 421 is sleeved on the top of the elastic element 43 and is provided with at least two diversion holes 423 for connecting the oil inlet hole 21 and the oil outlet hole 12. This utility model adopts the optimal four-diversion hole 423 embodiment through testing. The guide handle 422 is inserted into the elastic element 43 and extends out to the middle positioning hole 11. The sealing ball 41 abuts against the top of the end cap 421 and is located below the oil inlet hole 21 to seal the oil inlet hole 21. When the valve is started or closed, the elastic element 43 can drive the end cap 421 to slide along the side wall of the sliding cavity 32 and cause the guide handle 422 to extend and retract along the middle positioning hole 11, thereby driving the sealing ball 41 to dynamically seal the oil inlet hole 21.

[0028] Compared with traditional fuel control valves, this invention has the following advantages: 1. A guide component is installed inside the valve cavity. The guide handle of the guide component passes through the elastic component and is positioned through the central positioning hole. The guide handle restricts the extension and retraction of the elastic component, effectively reducing the twisting phenomenon of the elastic component during the extension and retraction process, and significantly reducing the polarization noise of the fuel control valve; 2. The guide component is also equipped with an end cap. The end cap can cooperate with the guide handle to further limit the elastic component, reduce the twisting of the elastic component, reduce the noise of the control valve, and 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, and the oil pressure fluctuation small, which is more conducive to extending the service life of the control valve; 3. The valve cavity structure is improved by dividing the valve cavity structure into a two-cavity structure that can better limit the position of the elastic component; 4. The overall structure of this invention is simple, the manufacturing cost is low, and it is more conducive to industrial production.

[0029] In one embodiment, the end cap 421 includes an end plate 424 and an edge portion 425 extending downward along the periphery of the end plate 424; the diversion hole 423 is disposed on the end plate 424. When fuel enters the valve chamber 3 from the inlet hole 21, the fuel pressure compresses the elastic element 43, and the edge portion 425 slides stably along the side wall of the valve chamber 3, and the fuel is output to the outlet hole 12 through the diversion hole 423.

[0030] As a preferred option, such as Figure 9 As shown, the distance between the elastic element 43 and the side wall of the sliding cavity 32 is D1; ​​the thickness of the edge portion 425 is D2; their length relationship is: D1≥D2>0.7D1. The edge portion 425 within this quantitative relationship has sufficient thickness and strength to withstand the pressure of fuel impact, ensuring that the edge portion 425 can slide stably along the side wall of the sliding cavity 32, thereby achieving the purpose of stabilizing the pressure in the valve cavity 3.

[0031] like Figure 5 As shown, the top surface of the end plate 424 is also provided with a spherical recess 426 adapted to the sealing ball 41, and the diversion holes 423 are distributed around the periphery of the recess 426. The recess 426 can effectively assist in stabilizing the connection between the sealing ball 41 and the guide member 42.

[0032] In another embodiment, the end plate 424 and the edge portion 425 form a receiving position 427 for accommodating the top end of the elastic member 43; the diversion hole 423 is staggered with the top end of the elastic member 43 to prevent the elastic member 43 from blocking the fuel from flowing out of the diversion hole 423; on the other hand, each of the diversion holes 423 is provided with a guide tube 428 extending downward to guide the fuel to pass through the guide member 42 in a directional and rapid manner, and the multiple guide tubes 428 divide the receiving position 427 into a positioning area 429 for positioning the elastic member 43, that is, the circumferential space between the guide tube 428 and the edge portion 425 is just used to snap the top end of the elastic member 43, further reducing the polarization noise generated by the vibration of the top end of the elastic member 43.

[0033] Preferably, the diameter ratio of the guide shank 422 to the central positioning hole 11 is 0.90 to 0.99. Within this diameter ratio range, the guide shank 422 can maintain good axial movement while minimizing the generation of radial resonance in the guide shank 422.

[0034] 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 in 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, and the inclined platform surface has a guiding effect to prevent fuel from accumulating on the limiting platform 33; in addition, the inclined platform surface is also conducive to the assembly of the elastic element 43.

[0035] Preferably, a flared opening 22 is provided below the oil inlet 21. The diameter of the flared opening 22 increases from top to bottom and forms a conical surface, which is used to assist in the accurate repositioning of the sealing ball 41.

[0036] As an example, the sealing sphere 41 is a metal sphere. The sealing sphere 41 made of this material can extend its service life and ensure the sealing performance of the sealing sphere 41.

[0037] In another embodiment, a sealing ring 23 is fitted onto the outer side of the sealing seat 2. During installation, the sealing ring 23 allows for a higher degree of sealing when the sealing seat 2 is connected to external devices.

[0038] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. An electric fuel injection pump control valve comprising 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), characterized in that: The sealing seat (2) is provided with an oil inlet hole (21), which communicates with the valve chamber (3); the bottom of the valve seat (1) is provided with a central positioning hole (11) and at least two oil outlet holes (12) surrounding the central positioning hole (11); the valve chamber (3) includes a lower positioning cavity (31) and an upper sliding cavity (32), and the diameter of the positioning cavity (31) is smaller than the diameter of the sliding cavity (32); It also includes an elastic component (4) for dynamically sealing the oil inlet (21), the elastic component (4) being installed inside the valve cavity (3) and disposed between the oil inlet (21) and the oil outlet (12), the elastic component (4) including at least a sealing ball (41), a guide (42) and an elastic component (43) connected in sequence; One end of the elastic element (43) is installed in the positioning cavity (31), and the other end extends into the sliding cavity (32); the guide element (42) includes an integrally connected end cap (421) and guide handle (422), the end cap (421) is sleeved on the top of the elastic element (43) and the end cap (421) is provided with at least two diversion holes (423) for connecting the oil inlet hole (21) and the oil outlet hole (12), the guide handle (422) is inserted into the elastic element (43) and extends out of the middle positioning hole (11); the sealing ball (41) abuts against the top of the end cap (421) and is located below the oil inlet hole (21); The elastic element (43) can drive the end cap (421) to slide along the side wall of the sliding cavity (32) and cause the guide handle (422) to extend and retract along the central positioning hole (11), thereby driving the sealing ball (41) to dynamically seal the oil inlet hole (21).

2. An electric fuel pump control valve according to claim 1, characterised in that: The end cap (421) includes an end plate (424) and an edge portion (425) extending downward along the periphery of the end plate (424); the diversion hole (423) is disposed on the end plate (424).

3. An electric fuel pump control valve according to claim 2, characterised in that: The distance between the elastic element (43) and the side wall of the sliding cavity (32) is D1; ​​the thickness of the edge portion (425) is D2; and D1 ≥ D2 > 0.7D1.

4. An electric fuel pump control valve according to claim 2, wherein: The top surface of the end plate (424) is also provided with a recess (426) that is adapted to the sealing ball (41), and the diversion hole (423) is distributed around the periphery of the recess (426).

5. An electric fuel pump control valve according to claim 2, wherein: The end plate (424) and the edge portion (425) form a receiving position (427) for accommodating the top end of the elastic member (43); the diversion hole (423) is staggered with the top end of the elastic member (43), and each diversion hole (423) is provided with a guide tube (428) extending downward, and the plurality of guide tubes (428) divide the receiving position (427) into a positioning area (429) for positioning the elastic member (43).

6. The electronic fuel injection pump control valve according to claim 1, characterized in that: The diameter ratio of the guide handle (422) to the central positioning hole (11) is 0.90 to 0.

99.

7. An electric fuel pump control valve according to claim 1, wherein: A limiting stage (33) is provided between the positioning cavity (31) and the sliding cavity (32); the end face of the limiting stage (33) is inclined towards the central axis of the positioning cavity (31).

8. An electric fuel pump control valve according to claim 1, wherein: A flared opening (22) is provided below the oil inlet (21).

9. An electric fuel pump control valve according to claim 1, wherein: The sealing ball (41) is a metal ball.

10. An electric fuel pump control valve according to any one of claims 1 to 9, characterised in that: A sealing ring (23) is sleeved outside the sealing seat (2).

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