Oil rail pressure control valve

Abstract

The utility model discloses an oil rail pressure control valve, which relates to the technical field of valves, and comprises a static iron core with one end provided with a mounting cavity and the other end provided with an insertion cavity; the ejector pin is coaxially inserted into the static iron core, and the two ends of the ejector pin are inserted into the mounting cavity and the insertion cavity respectively; one end of the valve seat is inserted into the insertion cavity, and a flow channel matched with the ejector pin is formed in the valve seat; the flange is positioned in the mounting cavity, and a gap is formed between the flange and the corresponding end of the ejector pin; the movable iron core is positioned in the mounting cavity and is fixedly connected with the corresponding end of the ejector pin; the driving coil unit is positioned in the mounting cavity and is used for driving the movable iron core to move away from the moving direction of the runner; and the spring is sleeved at the corresponding end of the ejector pin, and two ends of the spring are respectively propped against the outer side of the movable iron core and the inner side of the flange. The utility model has the effects of stable matching and effective sealing and pressure control.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically to an oil rail pressure control valve. Background Art

[0002] The oil rail pressure control valve mainly plays the role of pressure regulation and constant pressure in the oil rail system. It uses the principle of control oil and spring balance during operation, and the working state is directly affected by the control pressure, thus forming a state that constantly changes according to the pressure.

[0003] However, although the existing oil rail pressure control valve adopts the electromagnetic coil mechanism to realize the control opening and closing strategy of the flow channel, the linkage effect, matching stability and sealing performance between the components are difficult to be effectively guaranteed, which affects the service life and pressure control accuracy of the oil rail pressure control valve and needs to be improved. Summary of the invention

[0004] In view of this, the purpose of this application is to provide a fuel rail pressure control valve to achieve the purpose of coordinated stable and effective sealing pressure control. The specific scheme is as follows:

[0005] An oil rail pressure control valve, comprising:

[0006] The static iron core has a mounting cavity at one end and a plug-in cavity at the other end;

[0007] An ejector pin is coaxially inserted into the static iron core, and two ends of the ejector pin are respectively inserted into the installation cavity and the insertion cavity;

[0008] A valve seat, one end of which is inserted into the insertion cavity and forms a flow channel matching the ejector pin;

[0009] A flange is located in the mounting cavity and forms a gap with a corresponding end of the ejector pin;

[0010] A moving iron core is located in the installation cavity and is connected and fixed to a corresponding end of the ejector pin;

[0011] A driving coil unit, located in the mounting cavity and used to drive the moving iron core to move away from the flow channel;

[0012] The spring is sleeved on a corresponding end of the ejector pin, and both ends of the spring are respectively in contact with the outer side of the moving iron core and the inner side of the flange.

[0013] Preferably, the installation cavity is in an inverted U shape along the axial section, and the drive coil unit is located at the lower end of the installation cavity.

[0014] Preferably: the upper end of the static iron core is detachably and fixedly connected with a plastic rubber coating, and the upper end of the flange abuts against the plastic rubber coating.

[0015] Preferably: the lower side of the flange is provided with an insert elastic cavity matching the spring and a movable matching cavity matching the moving iron core in sequence; the outer side of the flange is provided with an upper sealing ring matching and sealing with the corresponding end of the static iron core.

[0016] Preferably, the driving coil unit comprises an internal frame and a coil inner cavity formed in the internal frame, and the coil inner cavity is used for mounting the coil.

[0017] Preferably: an outer sealing ring is provided on the outer side of the lower end of the static iron core, and a plug-in gasket is provided in the plug-in cavity; a plug-in part inserted into the plug-in cavity is provided at the upper end of the valve seat, and the plug-in part abuts against the plug-in gasket; a plastic gasket, a bottom sealing ring and a filter cover are sequentially sleeved on the lower end of the valve seat from top to bottom.

[0018] Preferably, the upper end of the flow channel is conical and is provided with a top ball, and the top ball matches and abuts against the top pin.

[0019] It can be seen from the above scheme that the present application provides an oil rail pressure control valve, which has the following beneficial effects: by arranging the drive coil unit in the middle part of the static iron core, when the drive coil unit drives the moving iron core to move upward relative to the static iron core, the ejector pin is driven to move upward to reduce the distance between the ejector pin and the flange, so that the spring is compressed and forms a corresponding elastic restoring force that drives the moving iron core to move downward and reset, and then when the drive coil unit remains in an unpowered state, the ejector pin and the flow channel will be closely matched to achieve an effective sealing and closing effect, so that the oil rail pressure control valve has the effect of stable coordination and effective sealing and pressure control. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of this embodiment.

[0021] Explanation of the accompanying drawings: 1. static iron core; 11. installation cavity; 12. built-in skeleton; 13. coil cavity; 14. outer sealing ring; 15. plug-in cavity; 16. plug-in gasket; 2. moving iron core; 21. spring; 3. valve seat; 31. plastic gasket; 32. bottom sealing ring; 33. filter cover; 34. flow channel; 35. plug-in part; 4. ejector pin; 41. ejector ball; 5. flange; 51. movable fitting cavity; 52. plug-in elastic cavity; 53. upper sealing ring; 6. plastic coating. DETAILED DESCRIPTION

[0022] In order to make the technical solution and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0023] like Figure 1 As shown, a rail pressure control valve includes a static iron core 1, a pin 4, a valve seat 3, a flange 5, a moving iron core 2, a drive coil unit and a spring 21. A mounting cavity 11 is provided at one end of the static iron core 1, and a plug-in cavity 15 is provided at the other end. The pin 4 is coaxially plugged into the static iron core 1, and its two ends are respectively plugged into the mounting cavity 11 and the plug-in cavity 15. One end of the valve seat 3 is plugged into the plug-in cavity 15, and a flow channel 34 matching the pin 4 is formed. The flange 5 is located in the mounting cavity 11, and a gap is formed between the flange 5 and the corresponding end of the pin 4. The spacing of the gap changes with the movement of the pin 4, and when the spacing of the gap decreases, the flow channel 34 and the pin 4 are separated from each other to achieve the purpose of opening and pressure control. The upper end of the flow channel 34 is conical and provided with a pin ball 41, and the pin ball 41 matches and abuts against the pin 4. The moving iron core 2 is located in the mounting cavity 11 and is connected and fixed to the corresponding end of the ejector pin 4. The driving coil unit is located in the mounting cavity 11 and is used to drive the moving iron core 2 to move away from the flow channel 34, thereby achieving the purpose of adjusting the spacing of the gap. The spring 21 is sleeved on the corresponding end of the ejector pin 4, and the two ends are respectively abutted against the outer side of the moving iron core 2 and the inner side of the flange 5.

[0024] like Figure 1 As shown, the mounting cavity 11 is inverted U-shaped along the axial section, and the driving coil unit is located at the lower end of the mounting cavity 11. The moving iron core 2 and the flange 5 are successively located at the upper end of the driving coil and are confined to the inner side of the upper end of the mounting cavity 11, so that the moving iron core 2, the flange 5 and the driving coil unit cooperate with each other to realize the mutual cooperation between the driving flow channel 34 and the ejector pin 4, thereby achieving the purpose of effectively controlling the pressure. It should be noted that a plastic coating 6 is detachably fixedly connected to the upper end of the static iron core 1. If threaded connection, snap-on connection, etc. are used, they will not be elaborated here. At the same time, the upper end of the flange 5 abuts against the plastic coating 6, so that the flange 5 is effectively fixed to the inner side of the mounting cavity 11.

[0025] The lower side of the flange 5 is provided with an insert elastic cavity 52 matching the spring 21 and a movable matching cavity 51 matching the moving iron core 2, and an upper sealing ring 53 matching and sealing with the corresponding end of the stationary iron core 1 is provided on the outer side of the flange 5. The upper sealing ring 53 plays a role in significantly improving the connection sealing effect and matching stability between the flange 5 and the stationary iron core 1.

[0026] It should be noted that the drive coil unit includes an internal skeleton 12 and a coil inner cavity 13 formed in the internal skeleton 12. The coil inner cavity 13 is used to install the coil. An outer sealing ring 14 is arranged on the outer side of the lower end of the static iron core 1, and a plug-in gasket 16 is arranged in the plug-in cavity 15. A plug-in portion 35 inserted into the plug-in cavity 15 is arranged at the upper end of the valve seat 3, and the plug-in portion 35 abuts against the plug-in gasket 16. At the same time, the lower end of the valve seat 3 is sequentially sleeved with a plastic gasket 31, a bottom sealing ring 32 and a filter cover 33 from top to bottom. The plastic gasket 31 and the plug-in gasket 16 have the function of improving the stability of the connection matching, and the bottom sealing ring 32 and the outer sealing ring 14 play a role in significantly improving the matching stability and sealing pressure control effect of the oil rail pressure control valve.

[0027] In summary, the present application provides an oil rail pressure control valve, which arranges the drive coil unit in the middle part of the static iron core 1, so that when the drive coil unit drives the moving iron core 2 to move upward relative to the static iron core 1, it drives the ejector pin 4 to move upward to reduce the distance between the ejector pin 4 and the flange 5, so that the spring 21 is compressed and forms a corresponding elastic restoring force to drive the moving iron core 2 to move downward and reset, and then when the drive coil unit remains in an unpowered state, the ejector pin 4 and the flow channel 34 will be closely matched to achieve an effective sealing and closing effect, so that the oil rail pressure control valve has the effect of stable coordination and effective sealing and pressure control.

[0028] The "first", "second", "third", "fourth", etc. (if any) referred to in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods or devices.

[0029] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0030] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A fuel rail pressure control valve, characterized in that: include: A static iron core (1) is provided with a mounting cavity (11) at one end and a plug-in cavity (15) at the other end; An ejector pin (4) is coaxially inserted into the static iron core (1), and two ends thereof are respectively inserted into the installation cavity (11) and the insertion cavity (15); A valve seat (3) having one end inserted into the insertion cavity (15) and formed with a flow channel (34) matching the ejector pin (4); A flange (5) is located in the mounting cavity (11) and forms a gap with a corresponding end of the ejector pin (4); A moving iron core (2) is located in the mounting cavity (11) and is connected and fixed to a corresponding end of the ejector pin (4); A driving coil unit, located in the mounting cavity (11) and used to drive the moving iron core (2) to move in a direction away from the flow channel (34); The spring (21) is sleeved on a corresponding end of the ejector pin (4), and both ends thereof are respectively in contact with the outer side of the moving iron core (2) and the inner side of the flange (5).

2. The fuel rail pressure control valve according to claim 1, characterized in that: The installation cavity (11) is in an inverted U shape along an axial section, and the drive coil unit is located at the lower end of the installation cavity (11).

3. The fuel rail pressure control valve according to claim 1, characterized in that: The upper end of the static iron core (1) is detachably and fixedly connected with a plastic rubber coating (6), and the upper end of the flange (5) is in contact with the plastic rubber coating (6).

4. The fuel rail pressure control valve according to claim 1, characterized in that: The lower side of the flange (5) is provided with an insert elastic cavity (52) matching the spring (21) and a movable matching cavity (51) matching the moving iron core (2) in sequence; the outer side of the flange (5) is provided with an upper sealing ring (53) matching and sealing with the corresponding end of the stationary iron core (1).

5. The fuel rail pressure control valve according to claim 1, characterized in that: The driving coil unit comprises an internal frame (12) and a coil inner cavity (13) formed in the internal frame (12), wherein the coil inner cavity (13) is used for installing the coil.

6. The fuel rail pressure control valve according to claim 1, characterized in that: An outer sealing ring (14) is arranged on the outer side of the lower end of the static iron core (1), and an insert gasket (16) is arranged in the insert cavity (15); an insert portion (35) inserted into the insert cavity (15) is arranged at the upper end of the valve seat (3), and the insert portion (35) abuts against the insert gasket (16); and a plastic gasket (31), a bottom sealing ring (32) and a filter cover (33) are sequentially sleeved on the lower end of the valve seat (3) from top to bottom.

7. The fuel rail pressure control valve according to claim 1, characterized in that: The upper end of the flow channel (34) is conical and is provided with a top ball (41), and the top ball (41) matches and abuts against the top needle (4).

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