Pressure-maintaining stable fuel pump pressure regulating valve

Abstract

The utility model relates to pressure regulating valve technical field, concretely is a kind of pressure-maintaining stable fuel pump pressure regulating valve, the side of oil outlet pipe is equipped with overflow pipe, overflow pipe is fixedly arranged overflow tank, the side of overflow tank is equipped with oil return pipe, the lower end of overflow tank is equipped with lifting assembly, the output of lifting assembly is equipped with the drive rod inserted into the inside of overflow tank, the top end of drive rod is equipped with the plug inserted into the inside of overflow pipe, oil pressure sensor is connected with lifting assembly by electric signal, on the basis of traditional pressure regulating function, increased dynamic pressure protection link, when system appears transient pressure peak value, overflow system can respond quickly, avoid pressure direct action on main pressure regulating structure, significantly reduced the risk that main valve core appears abrasion, jam because of long-term bearing overload pressure, prolongs the overall service life of pressure regulating valve, effectively suppresses the fluctuation of fuel pressure simultaneously, guarantees the stability of fuel supply.

Description

Technical Field

[0001] This utility model relates to the field of pressure regulating valve technology, specifically a pressure regulating valve for a pressure-stabilizing fuel pump. Background Technology

[0002] In the fuel supply system, the fuel pump pressure regulating valve is a core component for maintaining stable fuel line pressure, and its performance directly affects the engine's combustion efficiency and operational safety.

[0003] Existing pressure regulating valves mostly rely on a single adjustment structure of the main valve core. When the system experiences instantaneous pressure peaks (such as rapid engine acceleration or fuel line blockage), the main valve core must directly bear the overload pressure. Long-term use can easily lead to wear, jamming, or spring fatigue of the valve core sealing surface, which in turn can cause pressure holding failure, resulting in problems such as oil pressure fluctuations and uneven fuel injection.

[0004] Meanwhile, if the pressure regulating valve fails to relieve pressure in time when the pressure is overloaded, the fuel pump will remain in a pressurized state, which will not only aggravate the mechanical wear of the pump body, but may also cause fuel vaporization or even burn out the pump body due to overheating, posing a serious safety hazard. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a pressure regulating valve for a pressure-stabilizing fuel pump.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a pressure regulating valve for a pressure-maintaining and stabilizing fuel pump, comprising a pressure regulating valve body, an inlet pipe at the inlet end of the pressure regulating valve body, an outlet pipe at the outlet end of the pressure regulating valve body, and an oil pressure sensor fixedly mounted on the outlet pipe, the detection end of the oil pressure sensor being located inside the outlet pipe; An overflow pipe is provided on one side of the oil outlet pipe, and an overflow box is fixedly installed on the overflow pipe. An oil return pipe is provided on one side of the overflow box, and a lifting assembly is provided at the lower end of the overflow box. A drive rod is provided at the output end of the lifting assembly and inserted into the overflow box. A plug is provided at the top of the drive rod and inserted into the overflow pipe. The oil pressure sensor is connected to the lifting assembly via an electrical signal.

[0007] Furthermore, an improvement of this utility model is that the lifting assembly adopts an electric push rod.

[0008] Furthermore, an improvement of this utility model is that the top of the plug has a conical structure.

[0009] To ensure the sealing of the plug, the present invention is improved by fixing a baffle at the bottom of the plug, the baffle being located below the overflow pipe, and a first sealing ring fitting against the inner wall of the overflow box is provided on the periphery of the baffle.

[0010] To ensure the sealing of the cover plate, the present invention has the following improvements: the bottom of the overflow box is provided with a groove, the top of the lifting assembly is fixedly provided with a cover plate, the cover plate is embedded in the groove and fixed inside the groove by screws, and the upper surface of the cover plate is provided with a second sealing ring that fits against the inner wall of the groove.

[0011] (III) Beneficial Effects Compared with the prior art, this utility model provides a pressure regulating valve for a pressure-maintaining and stabilizing fuel pump, which has the following beneficial effects: This pressure regulating valve adopts a dual pressure-maintaining mechanism that combines a main pressure regulating structure with an overflow pressure relief system. On the basis of traditional pressure regulating function, a dynamic pressure protection link is added. When the system experiences an instantaneous pressure peak, the overflow system can respond quickly to prevent the pressure from acting directly on the main pressure regulating structure. This significantly reduces the risk of wear and jamming of the main valve core due to long-term overload pressure, extends the overall service life of the pressure regulating valve, and effectively suppresses fuel pressure fluctuations, ensuring the stability of fuel supply. Attached Figure Description

[0012] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention; Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention; Figure 3 This utility model Figure 1 The main view; Figure 4 This is a schematic diagram of the internal structure of the overflow pipe in this utility model; Figure 5 This is a schematic diagram of the installation structure of the first sealing ring in this utility model; In the diagram: 1. Pressure regulating valve body; 2. Oil inlet pipe; 3. Oil outlet pipe; 4. Oil pressure sensor; 5. Overflow box; 6. Overflow pipe; 7. Return pipe; 8. Cover plate; 9. Lifting assembly; 10. Baffle; 11. Plug; 12. Drive rod; 13. Groove; 14. First sealing ring. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figures 1-5The present invention provides a pressure regulating valve for a pressure-maintaining and stabilizing fuel pump, comprising a pressure regulating valve body 1, an oil inlet pipe 2 at the oil inlet end of the pressure regulating valve body 1, an oil outlet pipe 3 at the oil outlet end of the pressure regulating valve body 1, and an oil pressure sensor 4 fixedly mounted on the oil outlet pipe 3, with the detection end of the oil pressure sensor 4 located inside the oil outlet pipe 3. An overflow pipe 6 is provided on one side of the oil outlet pipe 3. An overflow box 5 is fixedly installed on the overflow pipe 6. An oil return pipe 7 is provided on one side of the overflow box 5. A lifting assembly 9 is provided at the lower end of the overflow box 5. A drive rod 12 is provided at the output end of the lifting assembly 9 and inserted into the overflow box 5. A plug 11 is provided at the top of the drive rod 12 and inserted into the overflow pipe 6. The oil pressure sensor 4 is connected to the lifting assembly 9 by an electrical signal.

[0015] The lifting assembly 9 uses an electric push rod.

[0016] Regular operation phase: The fuel pump delivers fuel into the inlet pipe 2 of the pressure regulating valve. After the pressure is regulated by the main body 1 of the pressure regulating valve, the fuel, which is in a stable pressure state, flows to the fuel rail assembly through the outlet pipe 3.

[0017] During this process, the oil pressure sensor 4 on the oil outlet pipe 3 continuously monitors the oil pressure inside the pipe and feeds back the relevant data to the control system in real time to ensure dynamic control of the fuel pressure status. Over-stress response: When the oil pressure in the oil outlet pipe 3 exceeds the preset safety range due to changes in engine operating conditions or abnormalities in the pipeline, the oil pressure sensor 4 will immediately send an electrical signal to start the lifting assembly 9. At this time, the electric push rod of the lifting assembly 9 will start to operate, and the drive rod 12 at its output end will drive the plug 11 to move downward, so that the passage of the overflow pipe 6 will gradually open. Pressure regulation process: After the overflow pipe 6 is opened, some of the fuel in the outlet pipe 3 will flow into the overflow box 5 through the overflow pipe 6, and then return to the fuel tank through the return pipe 7, thereby effectively releasing the fuel pressure. At the same time, the control system continuously adjusts the travel of the electric push rod based on the real-time pressure data fed back by the oil pressure sensor 4, thereby precisely controlling the descent of the plug 11 to ensure that the fuel pressure remains stable within the safe threshold. Pressure recovery and system reset: A baffle 10 is fixedly installed at the bottom end of the plug 11. The baffle 10 is located below the overflow pipe 6, and a first sealing ring 14 is provided on the periphery of the baffle 10 to fit the inner wall of the overflow box 5.

[0018] After a period of time, when the oil pressure in the outlet pipe 3 drops below the safety threshold, the control system will send a reset signal, and the electric push rod will drive the drive rod 12 to rise. The plug 11 will then move upward and re-seal the overflow pipe 6. The conical structure at the top of the plug 11 can fit tightly against the inner wall of the overflow pipe 6. In addition, the first sealing ring 14 on the periphery of the baffle 10 at the bottom of the plug 11 fits against the inner wall of the overflow box 5, thus ensuring a reliable seal at the overflow pipe 6 and effectively preventing fuel leakage.

[0019] The bottom of the overflow box 5 is provided with a groove 13, and the top of the lifting assembly 9 is fixedly provided with a cover plate 8. The cover plate 8 is embedded in the groove 13 and fixed inside the groove 13 by screws. The upper surface of the cover plate 8 is provided with a second sealing ring that fits against the inner wall of the groove 13.

[0020] The bottom groove 13 of the overflow box 5 is embeddedly connected to the top cover plate 8 of the lifting assembly 9. While being fixed with screws, the second sealing ring on the upper surface of the cover plate 8 fits against the inner wall of the groove 13, which not only ensures the sealing performance of the overflow box 5, but also provides convenience for subsequent maintenance and repair. The oil pressure sensor 4 monitors the pressure in the oil outlet pipe 3 in real time and transmits the signal to the lifting assembly 9 in a timely manner, forming a complete closed-loop control system. The electric push rod can accurately adjust the position of the plug 11 according to the pressure change, so as to achieve precise control of the overflow flow.

[0021] The top of the plug 11 has a conical structure.

[0022] The conical structure design of the plug 11 makes the opening and closing process of the overflow channel smoother, reduces the hydraulic shock caused by sudden changes in fuel flow, and further improves the stability of pressure regulation.

[0023] Through real-time monitoring and dynamic adjustment, this pressure regulating valve can quickly initiate a pressure relief procedure when the fuel pressure exceeds the safe range. This prevents the fuel pump from experiencing increased mechanical wear due to prolonged pressure buildup, reduces the risk of fuel vaporization or even pump damage caused by overheating, and provides reliable assurance for the safe operation of the fuel supply system. Simultaneously, the multi-seal design effectively prevents fuel leakage, further enhancing system safety. The lifting assembly 9 uses an electric push rod, which improves the operational reliability of the drive mechanism and ensures the stability of pressure regulation.

[0024] The pressure regulation threshold of this pressure regulating valve can be flexibly set by the control system, which can adapt to the fuel pressure requirements of different types of engines and different operating conditions. It does not require major changes to the pipeline layout of the existing fuel supply system, is easy to integrate into various fuel systems, and has broad application prospects.

[0025] Oil pressure sensor model 4: WH136 Parameters: Pressure range: 0-5MPa, which can meet the common pressure monitoring range of the fuel system and is compatible with the pressure regulating valve to monitor the oil pressure of the oil outlet pipe 3. Pressure type: Supports gauge pressure, absolute pressure, and sealing pressure, and can flexibly adapt to different types of pressure measurement scenarios. In this pressure regulating valve, it is mainly used for gauge pressure monitoring. Power supply voltage: 5VDC or 12-36VDC can be selected to adapt to the electrical systems of different vehicles or equipment.

[0026] Electric linear actuator models: DC motor-driven electric linear actuators based on trapezoidal lead screws can be selected, such as the common 24V DC motor-driven electric linear actuators adapted for automobiles and other mobile devices.

[0027] The first sealing ring 14 and the second sealing ring can be O-rings made of nitrile rubber. Material: Nitrile rubber, which has excellent oil resistance and can effectively resist fuel corrosion, ensuring long-term stable operation in fuel environments. At the same time, it possesses a certain degree of elasticity and wear resistance, guaranteeing the durability of sealing performance.

[0028] Plug 11 Material: High-strength, wear-resistant metal materials, such as stainless steel, are selected to ensure that plug 11 has sufficient strength to resist fuel pressure impact and has good corrosion resistance, so it is not easily damaged during long-term use in the fuel environment.

[0029] The linkage between the oil pressure sensor 4 and the electric actuator achieves precise control of fuel pressure through a combination of real-time signal transmission and dynamic execution adjustment. The specific principle is as follows: During the operation of the pressure regulating valve, the oil pressure sensor 4 continuously monitors the fuel pressure in the outlet pipe 3 and continuously converts the pressure signal into an electrical signal (such as a voltage or current signal) and transmits it to the control system. When the oil pressure in the outlet pipe 3 is within the normal range, the electrical signal fed back by the sensor stabilizes within the preset range, and the control system does not trigger the electric push rod. At this time, the electric push rod remains in its initial state, and the plug 11 tightly seals the overflow pipe 6, ensuring that all fuel flows to the fuel rail through the outlet pipe 3. Throughout the entire linkage process, the oil pressure sensor 4 acts as a "monitoring unit" to provide real-time pressure data, while the electric push rod acts as an "execution unit" to accurately respond to adjustment needs. The two form a dynamic balance with instant feedback through the control system, realizing automated and high-precision control of fuel pressure.

[0030] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A pressure regulating valve for a pressure-stabilizing fuel pump, comprising a pressure regulating valve body (1), an inlet pipe (2) at the inlet end of the pressure regulating valve body (1), and an outlet pipe (3) at the outlet end of the pressure regulating valve body (1), characterized in that: An oil pressure sensor (4) is fixedly installed on the oil outlet pipe (3), and the detection end of the oil pressure sensor (4) is located inside the oil outlet pipe (3); An overflow pipe (6) is provided on one side of the oil outlet pipe (3), an overflow box (5) is fixedly installed on the overflow pipe (6), a return oil pipe (7) is provided on one side of the overflow box (5), a lifting assembly (9) is provided at the lower end of the overflow box (5), a drive rod (12) is provided at the output end of the lifting assembly (9) and inserted into the overflow box (5), and a plug (11) is provided at the top of the drive rod (12) and inserted into the overflow pipe (6). The oil pressure sensor (4) is connected to the lifting assembly (9) by an electrical signal.

2. The pressure regulating valve for a pressure-maintaining and stabilizing fuel pump according to claim 1, characterized in that: The lifting assembly (9) uses an electric push rod.

3. The pressure regulating valve for a pressure-maintaining and stabilizing fuel pump according to claim 2, characterized in that: The top of the plug (11) has a conical structure.

4. The pressure regulating valve for a pressure-maintaining and stabilizing fuel pump according to claim 3, characterized in that: A baffle (10) is fixedly installed at the bottom of the plug (11). The baffle (10) is located below the overflow pipe (6), and a first sealing ring (14) is provided on the periphery of the baffle (10) to fit the inner wall of the overflow box (5).

5. The pressure regulating valve for a pressure-maintaining and stabilizing fuel pump according to claim 4, characterized in that: The bottom of the overflow box (5) is provided with a groove (13), and the top of the lifting assembly (9) is fixedly provided with a cover plate (8). The cover plate (8) is embedded in the groove (13) and fixed inside the groove (13) by screws.

6. The pressure regulating valve for a pressure-maintaining and stabilizing fuel pump according to claim 5, characterized in that: The upper surface of the cover plate (8) is provided with a second sealing ring that fits the inner wall of the groove (13).

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