Integrated V-shaped pump cover of high-pressure oil supply pump

Abstract

The utility model belongs to the technical field, and discloses an integrated V-shaped pump cover of a high-pressure oil supply pump, which comprises a pump cover, and a fuel oil cavity is arranged at the bottom of the pump cover; the oil inlet connecting cavity and the oil outlet connecting cavity are obliquely formed in the pump cover and form a V-shaped structure; an oil inlet communicating hole is concentrically formed in the lower end of the oil inlet connecting cavity, and the oil inlet connecting cavity is communicated with the fuel oil cavity through the oil inlet communicating hole; an oil outlet communicating hole is concentrically formed in the lower end of the oil outlet connecting cavity, and the oil outlet connecting cavity is communicated with the fuel oil cavity through the oil outlet communicating hole; the central axis of the fuel oil cavity is vertically arranged, and the central axis of the oil inlet communicating hole and the central axis of the oil outlet communicating hole form included angles with the central axis of the fuel oil cavity. The device is simple in structure, high in integration level, convenient to install in an engine compartment or a hydraulic system with limited space, and good in applicability; in addition, backflow or leakage of oil liquid is prevented, and cleanliness of an oil way and stability of a system are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumps, in particular to an integrated V-shaped pump cover of a high-pressure oil supply pump. Background Art

[0002] The diesel engine's high-pressure fuel pump is a key component in the engine. Its primary function is to precisely deliver oil to each friction point in the engine, ensuring oil circulation within the lubrication path, thereby achieving efficient engine lubrication. Traditional diesel engine high-pressure fuel pumps are primarily integrated structures and rely on external forces (such as camshaft rotation) to drive the piston or plunger inside the high-pressure fuel pump, thereby achieving fuel intake, compression, and discharge.

[0003] With the development of the automobile industry, diesel engine high-pressure fuel pumps are also developing towards high rail pressure, high speed and lightweight. However, traditional diesel engine high-pressure fuel pumps still have the following defects: (1) Due to the high speed and rail pressure, their structure is relatively complex, resulting in the high-pressure fuel pump occupying a large space, which is not convenient for use in engine compartments or hydraulic systems with limited space; (2) When the high-pressure fuel pump stops working, the oil is prone to backflow or leakage, affecting the cleanliness of the oil circuit and the stability of the system. Utility Model Content

[0004] The purpose of the utility model is to provide an integrated V-shaped pump cover for a high-pressure oil supply pump, which has a simple structure, high integration, is easy to install in an engine compartment or hydraulic system with limited space, and has good applicability; and prevents backflow or leakage of oil, ensuring the cleanliness of the oil circuit and the stability of the system.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] An integrated V-shaped pump cover for a high-pressure fuel supply pump includes a pump cover with a fuel cavity provided at the bottom thereof; and further includes an oil inlet connecting cavity and an oil outlet connecting cavity obliquely arranged on the pump cover, the oil inlet connecting cavity and the oil outlet connecting cavity forming a V-shaped structure;

[0007] An oil inlet connecting hole is concentrically provided at the lower end of the oil inlet connecting cavity, and the oil inlet connecting cavity and the fuel cavity are connected through the oil inlet connecting hole;

[0008] An oil outlet connecting hole is concentrically provided at the lower end of the oil outlet connecting cavity, and the oil outlet connecting cavity and the fuel oil cavity are connected through the oil outlet connecting hole;

[0009] The central axis of the fuel cavity is vertically arranged, and the central axes of the oil inlet connecting hole and the oil outlet connecting hole both form an angle with the central axis of the fuel cavity.

[0010] Furthermore, an oil inlet valve assembly is provided in the oil inlet connecting chamber, an oil outlet valve assembly is provided in the oil outlet connecting chamber, and a high-pressure oil outlet joint is provided on the top of the pump cover;

[0011] The oil inlet connecting chamber is connected to the external oil supply device through the oil inlet channel in the pump cover, and the oil outlet connecting chamber is connected to the high-pressure oil outlet joint through the oil outlet channel in the pump cover for oil outlet.

[0012] Furthermore, the oil inlet valve assembly includes an oil inlet valve seat, an oil inlet spring seat, an oil inlet valve spring and an oil inlet valve core; the oil inlet valve seat is sealed in the oil inlet connecting cavity, and an oil inlet cavity is formed on the oil inlet valve seat, and the oil inlet cavity is connected to the oil inlet channel in the pump cover; the oil inlet spring seat is fixedly sleeved on the upper end of the oil inlet valve core, and the oil inlet valve spring is sleeved on the oil inlet valve core between the oil inlet spring seat and the oil inlet valve seat; the lower end of the oil inlet valve core passes through the oil inlet cavity of the oil inlet valve seat and then presses against the bottom of the oil inlet valve seat to form a first sealing surface; a movable cavity for the oil inlet valve core to move is also provided between the oil inlet cavity and the oil inlet connecting hole;

[0013] The oil outlet valve assembly includes an oil outlet spring seat, an oil outlet valve spring and an oil outlet valve core; the oil outlet spring seat is sealed at the upper end of the oil outlet connecting chamber, and the lower end of the oil outlet connecting chamber serves as the oil outlet chamber; one end of the oil outlet valve spring is fixed to the oil outlet spring seat, and the other end is fixedly connected to the oil outlet valve core. The oil outlet valve core is a spherical structure, and the oil outlet valve core is pressed at the junction of the oil outlet connecting chamber and the oil outlet connecting hole to form a second sealing surface.

[0014] Furthermore, it also includes an oil inlet metering valve arranged on the pump cover, and the oil inlet metering valve cooperates with the external ECU to control the oil inlet amount.

[0015] Furthermore, it also includes an overflow valve and a pressure-limiting valve arranged on the pump cover, and the overflow valve and the pressure-limiting valve are both connected to the fuel cavity through the oil channel in the pump cover.

[0016] Furthermore, the angle α formed by the central axes of the oil inlet communicating hole and the oil outlet communicating hole is 30° to 120°.

[0017] The beneficial effects of the present invention are:

[0018] 1. The utility model has a simple structure and high integration, is easy to install in an engine compartment or hydraulic system with limited space, and has good applicability.

[0019] 2. The oil inlet connecting chamber and the oil outlet connecting chamber of the utility model are both inclined so that the two form a V-shaped structure, which can make the oil inlet valve assembly and the oil outlet valve assembly also form a V-shaped structure. The above structure can effectively utilize the space on the pump cover to reduce the volume and complexity of the overall layout of the high-pressure oil supply pump; and the inclined setting of the oil inlet connecting chamber facilitates the oil inlet channel to guide the oil flow more smoothly, reducing the resistance and energy loss of the oil during the flow process; it can effectively prevent the oil from flowing back or leaking when the high-pressure oil supply pump stops working, thereby maintaining the cleanliness of the oil circuit and the stability of the system; it can also optimize the oil suction and discharge process, reduce cavitation during the pumping process, and thus improve the pumping efficiency and stability of the high-pressure oil supply pump.

[0020] 3. The oil inlet and outlet connecting chambers are tilted to form a V-shaped structure, which also facilitates the connection of the oil inlet and outlet connecting chambers with other parts of the system, thereby simplifying the installation process of the high-pressure oil supply pump and making it easier to access and clean during maintenance and overhaul, reducing maintenance difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work:

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0023] Figure 2 yes Figure 1 A schematic diagram of a structure viewed along the AA plane.

[0024] Figure 3 yes Figure 1 A schematic diagram of a top view structure.

[0025] In the figure: 1. Pump cover; 2. Fuel chamber; 3. Oil inlet connecting hole; 4. Oil outlet connecting hole; 5. Oil inlet chamber; 6. Oil inlet valve assembly; 7. Oil outlet valve assembly; 8. Oil outlet chamber; 9. High-pressure oil outlet connector; 10. First sealing surface; 11. Active chamber; 12. Second sealing surface; 13. Oil inlet metering valve; 14. Relief valve; 15. Pressure-limiting valve; 16. Oil inlet connecting chamber; 17. Oil outlet connecting chamber.

[0026] 601. Oil inlet valve seat; 602. Oil inlet spring seat; 603. Oil inlet valve spring; 604. Oil inlet valve core;

[0027] 701. Oil outlet spring seat; 702. Oil outlet valve spring; 703. Oil outlet valve core. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the following will be described clearly and completely in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] An integrated V-shaped pump cover for a high-pressure fuel supply pump includes a pump cover 1, a fuel chamber 2 being provided at the bottom of the pump cover 1, and an oil inlet connecting chamber 16 and an oil outlet connecting chamber 17 being obliquely arranged on the pump cover 1, the oil inlet connecting chamber 16 and the oil outlet connecting chamber 17 forming a V-shaped structure.

[0030] An oil inlet connecting hole 3 is concentrically provided at the lower end of the oil inlet connecting chamber 16, and the oil inlet connecting chamber 16 and the fuel chamber 2 are connected through the oil inlet connecting hole 3;

[0031] An oil outlet connecting hole 4 is concentrically provided at the lower end of the oil outlet connecting cavity 17, and the oil outlet connecting cavity 17 and the fuel oil cavity 2 are connected through the oil outlet connecting hole 4;

[0032] The central axis of the fuel chamber 2 is vertically arranged, and the central axes of the oil inlet connecting hole 3 and the oil outlet connecting hole 4 form an angle with the central axis of the fuel chamber 2. In the above structure, the lower ends of the oil inlet connecting hole 3 and the oil outlet connecting hole 4 are close to each other, and the upper ends are far away from each other.

[0033] The pump cover 1 of the present invention is primarily mounted above the pump body, which is a high-pressure fuel pump commonly found in the prior art. The fuel chamber 2 at the bottom of the pump cover 1 is designed to engage a plunger, the bottom of which is connected to a cam mechanism. During operation, the diesel engine's gear train drives the camshaft, which in turn drives the plunger up and down within the fuel chamber 2, filling and compressing the plunger and thus supplying high-pressure diesel to the common rail system. This operating principle is identical to that of the cam mechanism in existing high-pressure fuel pumps and will not be further elaborated here.

[0034] In actual design, there are more than one fuel chambers 2 on each pump cover 1, and each fuel chamber 2 is equipped with an oil inlet connecting chamber 16, an oil outlet connecting chamber 17, an oil inlet connecting hole 3 and an oil outlet connecting hole 4, as well as corresponding oil inlet valve assembly 6 and oil outlet valve assembly 7.

[0035] The oil inlet connecting chamber 16 and the oil outlet connecting chamber 17 are both tilted, so that the central axes of the oil inlet connecting hole 3 and the oil outlet connecting hole 4 are V-shaped. This can effectively utilize the space on the pump cover 1, thereby reducing the volume and complexity of the overall layout of the high-pressure oil supply pump. In addition, the tilted setting of the oil inlet connecting chamber 16 facilitates smoother oil flow in the oil inlet channel, reducing resistance and energy loss during the flow of the oil. It can also effectively prevent oil from backflowing or leaking when the high-pressure oil supply pump stops working, thereby maintaining the cleanliness of the oil circuit and the stability of the system. In addition, it can also optimize the oil intake and discharge process, reduce cavitation during the pumping process (i.e., the formation of bubbles in the oil inside the pump), and thus improve the pumping efficiency and stability of the high-pressure oil supply pump. This arrangement of the oil inlet connecting chamber 16 and the oil outlet connecting chamber 17 also facilitates connection with other parts of the system, thereby simplifying the installation process of the high-pressure oil supply pump and making it easier to access and clean during maintenance and overhaul, reducing maintenance difficulty and cost.

[0036] In the present invention, the angle α between the central axes of the oil inlet connecting hole 3 and the oil outlet connecting hole 4 is between 30° and 120°. Since the oil inlet connecting cavity 16 is concentric with the oil inlet connecting hole 3, and the oil outlet connecting cavity 17 is concentric with the oil outlet connecting hole 4, the angle between the central axes of the oil inlet connecting hole 3 and the oil outlet connecting hole 4 is the angle between the central axes of the oil inlet connecting cavity 16 and the oil outlet connecting cavity 17. Within this angle range, the aforementioned function can be achieved without affecting the normal operation of the device. In a preferred embodiment of the present invention, the angle α between the central axes of the oil inlet connecting hole 3 and the oil outlet connecting hole 4 is 40°.

[0037] In the present invention, the oil inlet connecting chamber 16 is provided with an oil inlet valve assembly 6, the oil outlet connecting chamber 17 is provided with an oil outlet valve assembly 7, and a high-pressure oil outlet connector 9 is also provided on the top of the pump cover 1. The oil inlet connecting chamber 16 is connected to the external oil supply device through the oil inlet channel in the pump cover 1, and the oil outlet connecting chamber 17 is connected to the high-pressure oil outlet connector 9 through the oil outlet channel in the pump cover 1 for oil outlet.

[0038] The oil inlet valve assembly 6 includes an oil inlet valve seat 601, an oil inlet spring seat 602, an oil inlet valve spring 603 and an oil inlet valve core 604; the oil inlet valve seat 601 is sealed in the oil inlet connecting cavity 16, and an oil inlet cavity 5 is opened on the oil inlet valve seat 601, and the oil inlet cavity 5 is connected with the oil inlet channel in the pump cover 1; the oil inlet spring seat 602 is fixedly sleeved on the upper end of the oil inlet valve core 604, and the oil inlet valve spring 603 is sleeved on the oil inlet valve core 604 between the oil inlet spring seat 602 and the oil inlet valve seat 601; the lower end of the oil inlet valve core 604 passes through the oil inlet cavity 5 of the oil inlet valve seat 601 and presses the bottom of the oil inlet valve seat 601 to form a first sealing surface 10; a movable cavity 11 for the oil inlet valve core 604 to move is also provided between the oil inlet cavity 5 and the oil inlet connecting hole 3.

[0039] The oil outlet valve assembly 7 includes an oil outlet spring seat 701, an oil outlet valve spring 702 and an oil outlet valve core 703; the oil outlet spring seat 701 is sealed at the upper end of the oil outlet connecting chamber 17, and the lower end of the oil outlet connecting chamber 17 serves as the oil outlet chamber 8; one end of the oil outlet valve spring 702 is fixed on the oil outlet spring seat 701, and the other end is fixedly connected to the oil outlet valve core 703. The oil outlet valve core 703 is a spherical structure, and the oil outlet valve core 703 is pressed against the junction of the oil outlet connecting chamber 17 and the oil outlet connecting hole 4 to form a second sealing surface 12.

[0040] The inlet valve assembly 6 primarily acts as a valve to control the flow of oil into the fuel chamber 2 during the suction process, while the outlet valve assembly 7 primarily acts as a valve to control the flow of oil out of the fuel chamber 2 during the discharge process. Both the inlet and outlet passages are channels defined on the pump cover 1 or are formed by piping embedded within the pump cover 1. These are common structures in high-pressure fuel pumps and are not shown in the drawings of this utility model. Those skilled in the art can routinely implement these structures using existing techniques.

[0041] The operating process of the fuel inlet valve assembly 6 is as follows: The plunger moves downward within the fuel chamber 2 under the action of the cam mechanism. This generates negative pressure within the fuel chamber 2, causing the fuel inlet valve core 604 to move downward along the fuel inlet communication hole 3, opening the first sealing surface 10. Under the action of this negative pressure, oil from the external fuel tank flows along the oil inlet passage into the fuel inlet chamber 5 and then through the fuel inlet communication hole 3 into the fuel chamber 2. Simultaneously, the fuel inlet valve spring 603 is compressed. After the oil enters the fuel chamber 2, the fuel inlet valve spring 603 returns to its original position, causing the fuel inlet valve core 604 to return to its original position and move upward, re-pressing the bottom of the fuel inlet valve seat 601 to form the first sealing surface 10.

[0042] The operating process of the oil outlet valve assembly 7 is as follows: The plunger moves upward within the fuel chamber 2 under the action of the cam mechanism. This compresses the space within the fuel chamber 2, generating saturated pressure. This saturated pressure pushes the oil outlet valve core 703 upward, opening the second sealing surface 12. Oil in the fuel chamber 2 flows upward along the oil outlet connecting hole 4 into the oil outlet chamber 8, and is then transported along the oil outlet channel to the high-pressure oil outlet connector 9. From there, it enters the common rail. Simultaneously, the oil outlet valve spring 702 is compressed. After the oil is discharged, the oil outlet valve spring 702 returns to its original position. Under the action of the oil outlet valve spring 702 and its own gravity, the oil outlet valve core 703 returns to its original position and moves downward, re-pressing the junction between the oil outlet connecting chamber 17 and the oil outlet connecting hole 4 to form the second sealing surface 12.

[0043] In the present invention, the oil inlet connecting hole 3, the oil inlet cavity 5, the oil inlet valve core 604 and the oil inlet spring seat 602 are concentrically arranged, and the oil outlet connecting hole 4, the oil outlet cavity 8 and the oil outlet spring seat 701 are concentrically arranged.

[0044] In the present invention, an oil inlet metering valve 13 is further provided on the pump cover 1 , and the oil inlet metering valve 13 cooperates with an external ECU to control the oil inlet amount.

[0045] The fuel metering valve 13 is a common structure in existing common rail pumps, primarily used to adjust fuel supply and stabilize fuel pressure. The connection method for the fuel metering valve 13 is also common and can be routinely implemented by those skilled in the art based on the solution of the present invention. The fuel metering valve 13 also includes an electrical connection for receiving control signals from the engine control unit (ECU). These signals are transmitted via cables or wiring harnesses to the solenoid valve or actuator of the fuel metering valve to control its opening and closing degree and fuel flow.

[0046] In one embodiment of the present invention, the fuel inlet metering valve 13 is fixed to the fuel inlet of the pump cover 1 of the high-pressure fuel supply pump by bolts, flanges or other fasteners to ensure that the fuel can smoothly enter the high-pressure fuel pump.

[0047] In another embodiment of the present invention, the oil inlet metering valve 13 may be connected to the oil inlet of the high-pressure oil supply pump through a low-pressure oil pipe.

[0048] In the present invention, a relief valve 14 and a pressure-limiting valve 15 are further included, which are arranged on the outer surface of the pump cover 1 . Both the relief valve 14 and the pressure-limiting valve 15 are connected to the fuel chamber 2 through the oil channel in the pump cover 1 .

[0049] The relief valve 14 in this utility model functions as a functional valve to control the oil pressure. By adjusting the return oil volume in two stages, the oil inlet pressure is stabilized at a constant value. The pressure-limiting valve 15 acts as a safety valve to control the high pressure of the entire pump body to a safety threshold. When the oil pressure in the fuel chamber 2 becomes excessive, the pressure is relieved by the pressure-limiting valve 15, and the oil is returned to the fuel supply device through the return oil pipeline connected to the pressure relief valve, thereby improving the reliability of the high-pressure fuel supply pump.

[0050] The overall operating process of the present invention is as follows: When the common rail high-pressure fuel supply pump is activated, the pump drives the plunger via a cam mechanism. External fuel is controlled by the ECU to adjust the opening of the inlet metering valve 13, regulating the amount of fuel entering. Fuel then flows from the fuel tank through the inlet metering valve 13, the inlet passage, the inlet chamber 5, the inlet connecting hole 3, and into the fuel chamber 2. After the fuel enters the fuel chamber 2, the plunger moves upward. Once the fuel in the fuel chamber 2 reaches a certain pressure, the outlet valve core 703 opens. Fuel then flows through the outlet connecting hole 4, the outlet chamber 8, the outlet passage, and into the high-pressure outlet connector 9. The plunger reciprocates, pumping high-pressure oil with relatively stable pressure and flow into the outlet passage, ultimately entering the common rail through the high-pressure outlet connector 9. The integrated pump cover 1 of the present invention integrates the entire fuel circuit, significantly reducing the device's size and facilitating installation in space-constrained engine compartments or hydraulic systems, offering excellent applicability.

[0051] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above is only a specific implementation method of the utility model and is not intended to limit the utility model. Any modifications, equivalent replacements and improvements made within the scope of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. An integrated V-shaped pump cover for a high-pressure fuel supply pump, characterized in that: The pump cover (1) comprises a fuel cavity (2) provided at the bottom thereof; and further comprises an oil inlet connecting cavity (16) and an oil outlet connecting cavity (17) obliquely arranged on the pump cover (1), wherein the oil inlet connecting cavity (16) and the oil outlet connecting cavity (17) form a V-shaped structure. An oil inlet connecting hole (3) is concentrically provided at the lower end of the oil inlet connecting cavity (16), and the oil inlet connecting cavity (16) and the fuel cavity (2) are communicated through the oil inlet connecting hole (3); An oil outlet connecting hole (4) is concentrically provided at the lower end of the oil outlet connecting cavity (17), and the oil outlet connecting cavity (17) and the fuel cavity (2) are communicated through the oil outlet connecting hole (4); The central axis of the fuel cavity (2) is arranged vertically, and the central axes of the oil inlet connecting hole (3) and the oil outlet connecting hole (4) both form an angle with the central axis of the fuel cavity (2).

2. The integrated V-shaped pump cover of the high-pressure fuel supply pump according to claim 1, characterized in that: An oil inlet valve assembly (6) is provided in the oil inlet connecting chamber (16), an oil outlet valve assembly (7) is provided in the oil outlet connecting chamber (17), and a high-pressure oil outlet connector (9) is also provided on the top of the pump cover (1); The oil inlet connecting chamber (16) is connected to an external oil supply device through an oil inlet passage in the pump cover (1), and the oil outlet connecting chamber (17) is connected to a high-pressure oil outlet joint (9) through an oil outlet passage in the pump cover (1) for oil outlet.

3. The integrated V-shaped pump cover of the high-pressure fuel supply pump according to claim 2, characterized in that: The oil inlet valve assembly (6) includes an oil inlet valve seat (601), an oil inlet spring seat (602), an oil inlet valve spring (603) and an oil inlet valve core (604); the oil inlet valve seat (601) is sealed in the oil inlet connecting cavity (16), and an oil inlet cavity (5) is formed on the oil inlet valve seat (601), and the oil inlet cavity (5) is communicated with the oil inlet channel in the pump cover (1); the oil inlet spring seat (602) is fixedly sleeved on the oil inlet valve core (604) The oil inlet valve spring (603) is sleeved on the oil inlet valve core (604) between the oil inlet spring seat (602) and the oil inlet valve seat (601); the lower end of the oil inlet valve core (604) passes through the oil inlet cavity (5) of the oil inlet valve seat (601) and presses against the bottom of the oil inlet valve seat (601) to form a first sealing surface (10); an active cavity (11) for the oil inlet valve core (604) to move is also provided between the oil inlet cavity (5) and the oil inlet connecting hole (3); The oil outlet valve assembly (7) comprises an oil outlet spring seat (701), an oil outlet valve spring (702) and an oil outlet valve core (703); the oil outlet spring seat (701) is sealingly arranged at the upper end of the oil outlet connecting cavity (17), and the lower end of the oil outlet connecting cavity (17) serves as the oil outlet cavity (8); one end of the oil outlet valve spring (702) is fixed to the oil outlet spring seat (701), and the other end is fixedly connected to the oil outlet valve core (703); the oil outlet valve core (703) is a spherical structure, and the oil outlet valve core (703) is pressed against the junction of the oil outlet connecting cavity (17) and the oil outlet communicating hole (4) to form a second sealing surface (12).

4. The integrated V-shaped pump cover of the high-pressure fuel supply pump according to claim 1, 2 or 3, characterized in that: The invention also comprises an oil inlet metering valve (13) arranged on the pump cover (1), and the oil inlet metering valve (13) cooperates with an external ECU to realize control of the oil inlet amount.

5. The integrated V-shaped pump cover of the high-pressure fuel supply pump according to claim 1, 2 or 3, characterized in that: It also includes an overflow valve (14) and a pressure-limiting valve (15) arranged on the pump cover (1); the overflow valve (14) and the pressure-limiting valve (15) are both connected to the fuel chamber (2) through the oil channel in the pump cover (1).

6. The integrated V-shaped pump cover of the high-pressure fuel supply pump according to claim 4, characterized in that: It also includes an overflow valve (14) and a pressure-limiting valve (15) arranged on the pump cover (1); the overflow valve (14) and the pressure-limiting valve (15) are both connected to the fuel chamber (2) through the oil channel in the pump cover (1).

7. The integrated V-shaped pump cover of the high-pressure fuel supply pump according to claim 1, 2, 3 or 6, characterized in that: The included angle α formed by the central axes of the oil inlet connecting hole (3) and the oil outlet connecting hole (4) is 30° to 120°.

8. The integrated V-shaped pump cover of the high-pressure fuel supply pump according to claim 4, characterized in that: The included angle α formed by the central axes of the oil inlet connecting hole (3) and the oil outlet connecting hole (4) is 30° to 120°.

9. The integrated V-shaped pump cover of the high-pressure fuel supply pump according to claim 5, characterized in that: The included angle α formed by the central axes of the oil inlet connecting hole (3) and the oil outlet connecting hole (4) is 30° to 120°.

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