Fuel pressure stabilizing device

Abstract

This application discloses a fuel pressure stabilizing device, belonging to the field of automotive fuel supply technology, used to adjust the fuel pressure of a fuel supply system. It includes a first valve body with a flow channel and a second valve body connected to the flow channel, in which a medium flows. The second valve body has a return chamber, and the return chamber contains a pressure stabilizing component for controlling the connection or closure between the return chamber and the flow channel to regulate the pressure of the medium within the flow channel. The pressure stabilizing component includes an opening / closing component and an adjusting component. The opening / closing component controls the connection or disconnection between the return chamber and the flow channel, and the adjusting component adjusts the opening pressure of the opening / closing component. This application allows for easy adjustment of the opening pressure of the opening / closing component through the adjusting component, enabling control of the opening pressure as needed. The overall structure is simple, the operation is stable and reliable, the opening / closing response is fast, and the pressure fluctuation is small.

Description

Technical Field

[0001] This application relates to the field of automotive fuel supply technology, specifically to a fuel pressure stabilizing device. Background Technology

[0002] As the core module of engine power output, the automotive fuel supply system typically includes a fuel pump, pressure regulating valve, injectors, and fuel lines. When the engine is running, it regulates the fuel pressure to maintain a constant value, ensuring a stable fuel supply to the injectors under different operating conditions. When the fuel pressure is too high, the pressure regulating valve releases excess fuel to prevent damage to components such as fuel lines and injectors due to excessive pressure. The fuel supply system usually consists of a diaphragm, spring, valve body, and return channel. It regulates fuel pressure through the elastic deformation of the diaphragm to ensure stable engine operation. The diaphragm deformation requires a certain amount of time to respond to pressure changes, which may lead to pressure regulation lag and affect fuel injection accuracy. Furthermore, the diaphragm elasticity is significantly affected by temperature, hardening at low temperatures and softening at high temperatures, resulting in unstable pressure regulation. The overall structure is also relatively complex. Utility Model Content

[0003] This application provides a fuel pressure stabilizing device to solve the problems existing in the prior art. It has a fast response, simple structure, and can accurately adjust the fuel pressure according to the usage requirements. The following technical solution is adopted:

[0004] A fuel pressure regulator for adjusting the fuel pressure of a fuel supply system includes a first valve body with a flow channel and a second valve body connected to the flow channel, wherein a medium flows in the flow channel.

[0005] The second valve body is provided with a reflux chamber, and the reflux chamber is provided with a pressure stabilizing component, which is used to control the connection or closure between the reflux chamber and the flow channel, so as to regulate the pressure of the medium in the flow channel;

[0006] The pressure stabilizing component includes an opening and closing component and an adjusting component. The opening and closing component is used to control the connection or disconnection between the return cavity and the flow channel, and the adjusting component is used to adjust the opening pressure of the opening and closing component.

[0007] Preferably, the opening and closing assembly includes a valve seat and a first support body, and a sealing body is provided between the first support body and the valve seat, the valve seat has a through hole, and the sealing body abuts against the through hole.

[0008] Preferably, the adjusting assembly includes an elastic element and an adjusting component, the elastic element being located between the adjusting component and the opening / closing assembly, and the adjusting component being adjustable in position within the second valve body along the axis of the second valve body.

[0009] More preferably, the first support body has a plurality of flow holes along the axial direction for fuel to pass through, and a gap is provided between the first support body and the second valve body.

[0010] More preferably, the opening / closing assembly and the adjusting component are respectively provided with annular grooves, and the elastic element is sleeved in the annular grooves.

[0011] More preferably, the valve seat is provided with a sealing structure, which is adapted to the sealing body and is used to place the sealing body.

[0012] Preferably, it further includes a fastening component located at the end of the adjusting assembly to limit the position of the adjusting assembly.

[0013] More preferably, the adjusting component is threadedly connected to the second valve body, and the adjusting component is provided with a drain hole.

[0014] Compared with the prior art, the beneficial effects of this application are as follows:

[0015] This application allows for adjustment of the opening pressure of the opening and closing components via an adjustment mechanism. The adjustment is convenient and the opening pressure can be controlled according to requirements. The overall structure is simple, the operation is stable and reliable, the opening and closing response speed is fast, and the pressure fluctuation is small. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of this application;

[0017] Figure 2 This application Figure 1 Enlarged view of a portion of point A in the middle;

[0018] Figure 3 This is a three-dimensional schematic diagram of this application.

[0019] In the picture:

[0020] 00. Shell;

[0021] 10. First valve body; 100. Flow channel;

[0022] 20. Second valve body; 200. Return chamber;

[0023] 30. Voltage stabilizing components;

[0024] 40. Opening and closing assembly; 410. Valve seat; 4100. Through hole; 420. Sealing body; 430. First support body; 4300. Flow hole;

[0025] 50. Adjustment component; 510. Elastic element; 520. Adjustment part; 5200. Drain hole; 530. Fastening part; 60. Gap. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described in this application are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] See Figures 1 to 3 Further explanation of this application:

[0028] A fuel pressure stabilizing device, used to adjust the fuel pressure of a fuel supply system, includes a housing 00, within which a flow channel 100 and a return chamber 200 are provided, the flow channel 100 being connected to the return chamber 200; the housing 00 includes a first valve body 10 having the flow channel 100, and a second valve body 20 communicating with the flow channel 100, wherein a medium with a certain pressure flows within the flow channel 100; in this embodiment, the medium can be fuel oil. Of course, it can also be other liquid or gaseous media.

[0029] In this embodiment, the first valve body 10 and the second valve body 20 are separate structures, which can reduce the processing difficulty and facilitate assembly; of course, the first valve body 10 and the second valve body 20 can also be an integral structure.

[0030] The second valve body 20 is provided with the return chamber 200, and the return chamber 200 is provided with a pressure stabilizing component 30, which is used to control the connection or closure between the return chamber 200 and the flow channel 100 to adjust the medium pressure in the flow channel 100; wherein, the return chamber 200 passes through the second valve body 20, and the flow channel 100 passes through the first valve body 10.

[0031] The pressure stabilizing component 30 includes an opening and closing component 40 and an adjusting component 50. The opening and closing component 40 is used to control the connection or disconnection between the return cavity 200 and the flow channel 100, and the adjusting component 50 is used to adjust the opening pressure of the opening and closing component 40.

[0032] When the medium pressure in the flow channel 100 reaches the opening pressure of the opening and closing component 40, the opening and closing component 40 opens, the return cavity 200 connects to the flow channel 100, and releases part of the medium in the flow channel 100. Until the medium pressure in the flow channel 100 is equal to or less than the opening pressure of the opening and closing component 40, the opening and closing component 40 closes, disconnecting the flow channel 100 from the return cavity 200, thereby ensuring that the pressure in the flow channel 100 is stable.

[0033] Compared to the diaphragm structure of existing technologies, this application has a simple structure. The opening pressure of the opening and closing components can be adjusted by adjusting the components, which is convenient and can control the opening pressure according to the needs. It is stable and reliable in operation, with fast opening and closing response and small pressure fluctuation.

[0034] The opening / closing assembly 40 includes a valve seat 410 and a first support body 430, and a sealing body 420 disposed between the first support body 430 and the valve seat 410. The valve seat 410 has a through hole 4100, and the sealing body 420 abuts against the through hole 4100. When the medium pressure in the flow channel 100 is lower than the opening pressure of the opening / closing assembly 40, the opening / closing assembly 40 pushes the sealing body 420 against the through hole 4100, thereby disconnecting the flow channel 100 from the return chamber 200.

[0035] The first support body 430 has a plurality of flow holes 4300 along the axial direction to connect the flow channel 100 with the return cavity 200 for the passage of medium. A gap 60 is provided between the first support body 430 and the second valve body 20 to avoid direct contact between the two. Part of the medium can flow from the flow channel to the return cavity 200 through the gap 60 and form a lubricating film in the gap 60 to reduce the frictional resistance of the first support body 430, which can greatly reduce the movement resistance of the first support body 430 and improve the opening and closing response speed. At the same time, the medium can flow to the return cavity 200 through the gap 60 and the flow holes 4300, thereby quickly discharging the medium in the flow channel 100 and avoiding excessive pressure fluctuations in the flow channel 100.

[0036] The sealing body 420 and the first support body 430 can be an integral structure. In this embodiment, the first support body 430 and the sealing body 420 are separate structures, which helps to reduce the processing difficulty.

[0037] In this embodiment, the valve seat 410 is provided with a sealing structure adapted to the sealing body 420 for placing the sealing body 420; wherein, the sealing body 420 is spherical, and the sealing structure is an arc-shaped sealing surface; when the sealing body 420 abuts against the sealing structure to close the through hole 4100, the sealing body 420 and the sealing structure are in surface-to-surface contact, thereby improving the sealing performance and preventing media leakage. Of course, it can also be used to stabilize the pressure of the gas medium.

[0038] In an embodiment not shown, the sealing body 420 may be a hollow structure, which can further reduce weight and improve opening and closing sensitivity.

[0039] In this embodiment, the adjustment component 50 includes an elastic element 510 and an adjustment component 520. The elastic element 510 is located between the adjustment component 520 and the opening and closing component 40. The adjustment component 520 can be adjusted in position within the second valve body 20 along the axial direction of the second valve body 20.

[0040] The adjusting component 520 is threadedly connected to the second valve body 20 to achieve axial direction adjustment. The adjusting component 520 is provided with a drain hole 5200 to allow the medium to be discharged from the return chamber 200. The elastic element 510 is a spring. The opening pressure of the sealing body 420 is adjusted by adjusting the spring compression through the adjusting component 520.

[0041] In some embodiments, to prevent the adjusting member 520 from changing its loose position, a fastening member 530 is also included, the fastening member 530 being disposed at the end of the adjusting assembly 50. Figure 1 The middle section (right side of the adjusting component) is used to limit the position of the adjusting component 50. The fastening component 530 is located at the end of the adjusting component 520. The fastening component 530 has a channel coaxially arranged with the drain hole 5200. The fastening component 530 is threadedly connected to the second valve body 20 and abuts against the adjusting component 520 to prevent the adjusting component 520 from changing its position within the second valve body 20 due to loosening, thereby causing changes in the opening pressure.

[0042] In some embodiments, the opening / closing assembly 40 and the adjusting member 520 are respectively provided with annular grooves; wherein, both the adjusting member 520 and the first support 430 are provided with the annular grooves, and the elastic member 510 is sleeved in the annular grooves. This prevents the first support 430 from shifting and contacting the second valve body 20.

[0043] In this embodiment, the flow channel 100 includes an inlet chamber and an outlet chamber that are interconnected. The inlet chamber is provided with a first connector that is connected to the fuel pump, the outlet chamber is provided with a second connector that is connected to the fuel injector, and the return chamber 200 is provided with a third connector that is connected to the fuel tank.

Claims

1. A fuel pressure stabilizing device for regulating the fuel pressure of a fuel supply system, characterized by: It includes a first valve body having a flow channel, and a second valve body communicating with the flow channel, wherein a medium flows in the flow channel; The second valve body is provided with a reflux chamber, and the reflux chamber is provided with a pressure stabilizing component, which is used to control the connection or closure between the reflux chamber and the flow channel, so as to regulate the pressure of the medium in the flow channel; The voltage stabilizing component includes an opening and closing component and an adjusting component. The opening and closing component is used to control the connection or disconnection between the return chamber and the flow channel, and the adjusting component is used to adjust the opening pressure of the opening and closing component. The opening and closing assembly includes a valve seat and a first support body, and a sealing body is provided between the first support body and the valve seat. The valve seat has a through hole, and the sealing body abuts against the through hole. The adjusting assembly includes an elastic element and an adjusting component. The elastic element is located between the adjusting component and the opening / closing assembly. The adjusting component can be adjusted in position within the second valve body along the axis of the second valve body. The first support body has several flow holes along the axial direction for the medium to pass through, and there is a gap between the first support body and the second valve body; The adjusting component is threadedly connected to the second valve body, and the adjusting component is provided with a drain hole; the adjusting component is located in the return cavity, and the drain hole is arranged coaxially with the return cavity.

2. The fuel pressure stabilizing device according to claim 1, characterized by: The opening and closing assembly and the adjusting component are respectively provided with annular grooves, and the elastic element is sleeved in the annular grooves.

3. The fuel pressure stabilizing apparatus according to claim 1, characterized by: The valve seat is provided with a sealing structure, which is adapted to the sealing body and is used to place the sealing body.

4. The fuel pressure stabilizing apparatus according to claim 1, characterized by: It also includes a fastening component located at the end of the adjusting assembly to limit the position of the adjusting assembly.

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