A fuel pump assembly for a motorcycle

Abstract

The present invention relates to a fuel pump assembly for a motorcycle, which includes a main fuel tank and an auxiliary fuel tank. The main fuel tank includes a pump core bracket and a flange cover part that are snap-connected. A drain pipe is vertically constructed on the pump core bracket. The upper end of the drain pipe communicates with the pressure relief port of a pressure regulating valve. A jet pipe is horizontally penetrated through the bottom of an oil receiving seat, and an ejection channel is formed inside the jet pipe. The inner end of the jet pipe is communicated with the lower end of the drain pipe. A jet nozzle is installed inside the jet pipe, and the nozzle end of the jet nozzle faces the outer end of the jet pipe. The lower end of the jet pipe is communicated with an ejection suction nozzle, and the ejection suction nozzle extends out of the lower end of the flange cover part and is communicated with the oil outlet of the auxiliary fuel tank. In this solution, the fuel discharged from the pressure relief valve enters the drain pipe. Under the action of the jet nozzle, the fuel flow rate increases and the pressure decreases, forming a low-pressure area, so that the fuel in the auxiliary fuel tank is in a high-pressure area, and the fuel flows from the high-pressure area to the low-pressure area, so as to achieve the purpose of sucking fuel from the lower-position auxiliary fuel tank to the higher-position one.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel pumps, and particularly to a fuel pump assembly for a motorcycle. Background Art

[0002] Basically, existing motorcycles do not have a mounted auxiliary fuel tank, and the volume of the main fuel tank of a motorcycle is often relatively small and cannot meet the demand for long endurance.

[0003] If an auxiliary fuel tank is mounted, another fuel pump is often required. Especially when the auxiliary fuel tank is mounted at a low position, adding a fuel pump will inevitably increase the vehicle cost and occupy vehicle space. Summary of the Invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a fuel pump assembly for a motorcycle. The fuel pump assembly includes a main fuel tank and an auxiliary fuel tank. An ejection channel is provided in the main fuel tank. By applying Bernoulli's principle of fluid mechanics, when the motorcycle uses one fuel pump, the fuel in the auxiliary fuel tank can be simultaneously sucked into the main fuel tank to increase the endurance.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: It includes a main fuel tank. The main fuel tank includes a pump core bracket and a flange cover component that are snap-connected, as well as a fuel pump core, a pressure regulating valve, and a filter screen provided on the pump core bracket. An oil inlet pipe is constructed on the upper part of the pump core bracket, and one side of the oil inlet pipe is communicated with the oil outlet of the fuel pump core. It is characterized in that: The other side of the oil inlet pipe is fixedly provided with a three-way seat. An upper oil port, a pressure relief port, and a lower oil port are opened in the three-way seat. The pressure regulating valve is installed in the three-way seat, and the pressure relief nozzle of the pressure regulating valve is inserted into the pressure relief port.

[0006] The upper oil port is communicated with the oil inlet pipe. A oil receiving seat is provided on the flange cover component. A first oil outlet is provided at the bottom of the oil receiving seat. The lower oil port is communicated with the first oil outlet. An oil outlet pipe is provided at the bottom of the flange cover component. The upper end of the oil outlet pipe is communicated with the first oil outlet, and the lower end is communicated with the pipeline of the engine.

[0007] A drainage pipe is vertically constructed on the pump core bracket. The upper end of the drainage pipe is communicated with the pressure relief port. A ejection pipe is horizontally penetrated through the bottom of the oil receiving seat. An ejection channel is formed in the ejection pipe. The inner end of the ejection pipe is communicated with the lower end of the drainage pipe. A jet nozzle is installed in the ejection pipe, and the nozzle end of the jet nozzle faces the outer end of the ejection pipe.

[0008] The fuel pump assembly further includes an auxiliary fuel tank. The auxiliary fuel tank is arranged below the main fuel tank. The lower end of the ejection pipe is communicated with an ejection suction nozzle. The ejection suction nozzle extends out of the lower end of the flange cover component and is communicated with the oil outlet of the auxiliary fuel tank.

[0009] Preferably, a jet nozzle seat is butt - connected to the bottom of the drain pipe, and a short pipe is horizontally constructed at the lower end of the jet nozzle seat and is snap - connected to the input end of the jet nozzle.

[0010] Preferably, a plurality of first support plates are constructed at the lower end of the short pipe to support on the flange cover component, and a second support plate is constructed at the side of the short pipe to support on the pump core bracket.

[0011] Preferably, a second oil outlet is formed at the outer end of the injection pipe, an umbrella valve bracket is hinged to the side of the oil receiving seat, an umbrella - shaped valve is fitted to the outer end of the second oil outlet, and the acting end of the umbrella valve bracket is snap - connected to the outer end of the umbrella - shaped valve.

[0012] Preferably, a sealing shell is provided on the pump core bracket below the lower oil port, a filtering cavity is formed inside the sealing shell, a filter element is provided inside the filtering cavity, a stepped step is formed on the oil receiving seat, and the lower end of the sealing shell and the filter element abuts against the stepped step.

[0013] Preferably, at least two symmetric clamping blocks are constructed on the side wall of the three - way seat, a pressure regulating valve buckle is provided outside the pressure regulating valve, and a bayonet for snap - connecting with the clamping block is formed on the pressure regulating valve buckle.

[0014] Preferably, an oil return nozzle is penetrated through the flange cover component, the lower end of the oil return nozzle is communicated with the oil inlet of the auxiliary fuel tank, a jack is opened on the pump core bracket, an oil return pipe is inserted into the jack, and the lower end of the oil return pipe is butt - connected to the upper end of the oil return nozzle.

[0015] Preferably, the filter screen is in an "L" shape and includes a horizontally arranged first filter body and a vertically arranged second filter body. A slot is formed between the flange cover component, the fuel pump core and the pump core bracket. The first filter body is clamped between the flange cover component and the bottom of the fuel pump core, the second filter body is arranged on the slot, a filtered oil outlet for butting against the oil inlet of the fuel pump core is provided on the first filter body, and a clamping groove is provided on the side of the filtered oil outlet for butting against the clamping column at the bottom of the fuel pump core.

[0016] Preferably, a pump core outer frame covering the outside of the fuel pump core is provided on the pump core bracket. Clamping blocks are formed on the side walls of the pump core outer frame and the sealing shell, the lower end of the side wall of the clamping block is beveled. First clamping plates extend upward from both sides of the upper end of the oil receiving seat, insertion openings are formed on both sides of the pump core outer frame, second clamping plates extend upward from the flange cover component, the second clamping plates pass through the insertion openings and are arranged outside the fuel pump core, and the first clamping plates and the second clamping plates form a clamping interface cooperating with the clamping block.

[0017] Preferably, a fixed plate is provided at the bottom of the flange cover component, a sealing groove is formed on the outer side of the lower part of the flange cover component, a sealing gasket is provided in the sealing groove, and clamping protrusions are provided circumferentially on both sides of the sealing gasket; a sensor assembly including a sensor and a float is provided on the pump core support; a circular socket is provided at the bottom of the flange cover component, and an oil pump positive electrode, an oil pump negative electrode, a sensor positive electrode, and a sensor negative electrode are provided in the circular socket.

[0018] With the above technical solution of the present invention, a drainage pipe communicated with the pressure regulating valve is provided on the main fuel tank, the lower end of the drainage pipe is connected to the injection pipe, a jet nozzle is provided at the connection of the injection pipe, and an injection suction nozzle is provided at the lower end of the injection pipe and connected to the oil outlet of the auxiliary fuel tank.

[0019] The fuel discharged from the pressure relief valve at the pressure valve enters the drainage pipe. Under the action of the jet nozzle, the fuel flow rate increases and the pressure decreases, forming a low-pressure area, so that the fuel in the auxiliary fuel tank is in a high-pressure area, and the fuel flows from the high-pressure area to the low-pressure area to achieve the purpose of sucking fuel from the auxiliary fuel tank at a lower position to a higher position.

[0020] In addition, a return pipe is also provided on the main fuel tank, and the return nozzle at the lower end of the return pipe is communicated with the oil inlet of the auxiliary fuel tank. When the amount of fuel in the main fuel tank is large and higher than the upper surface of the return pipe, the return pipe discharges the fuel sucked into the main fuel tank back to the auxiliary fuel tank through the return nozzle, avoiding the overflow of the main fuel tank due to continuous fuel intake. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structure diagram of the main fuel tank.

[0022] Figure 2 is a front cross-sectional view of the main fuel tank.

[0023] Figure 3 is a side structure diagram of the main fuel tank.

[0024] Figure 4 is a three-dimensional structure diagram of the pump core support from the first perspective.

[0025] Figure 5 is a three-dimensional structure diagram of the pump core support from the second perspective.

[0026] Figure 6 is a three-dimensional structure diagram of the pump core support from the third perspective.

[0027] Figure 7 is a three-dimensional structure diagram of the flange cover component from the first perspective.

[0028] Figure 8 is a three-dimensional structure diagram of the flange cover component from the second perspective.

[0029] Figure 9It is a schematic perspective view of the third perspective of the flange cover component.

[0030] Figure 10 It is a schematic perspective view of the filter element.

[0031] Figure 11 It is a schematic perspective view of the fuel pump core.

[0032] Figure 12 It is an assembly schematic diagram of the jet nozzle seat and the jet nozzle.

[0033] Figure 13 It is a schematic perspective view of the jet nozzle.

[0034] Figure 14 It is a schematic perspective view of the pressure regulating valve.

[0035] Figure 15 It is a schematic perspective view of the pressure regulating valve buckle.

[0036] Figure 16 It is an unfolded schematic diagram of the filter screen.

[0037] Figure 17 It is a bottom view schematic diagram of the main fuel tank.

[0038] Figure 18 It is a schematic diagram of the gasket structure.

[0039] Figure 19 For Figure 17 The enlarged view at position B in

[0040] Figure 20 For Figure 17 The enlarged view at position A in Embodiment

[0041] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0042] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more, unless otherwise clearly defined.

[0044] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0046] As Figures 1 - 20 shown, a fuel pump assembly for a motorcycle includes a main fuel tank. The main fuel tank includes a snap-fitted pump core bracket 1 and a flange cover component 2, and a fuel pump core 3, a pressure regulating valve 4 and a filter screen 5 provided on the pump core bracket 1. An oil inlet pipe 6 is constructed on the upper part of the pump core bracket 1, and one side of the oil inlet pipe 6 communicates with the oil outlet 7 of the fuel pump core. A tee seat 8 is fixedly provided on the other side of the oil inlet pipe 6. An oil filling port 9, a pressure relief port 10 and an oil outlet 11 are opened in the tee seat 8. The pressure regulating valve 4 is installed in the tee seat 8, and the pressure relief nozzle of the pressure regulating valve 4 is inserted into the pressure relief port 10.

[0047] The oil filling port 9 communicates with the oil inlet pipe 6. A receiving seat 12 is provided on the flange cover component 2. A first oil outlet 13 is provided at the bottom of the receiving seat 12, and the oil outlet 11 communicates with the first oil outlet 13. An oil outlet pipe 14 is provided at the bottom of the flange cover component 2. The upper end of the oil outlet pipe 14 communicates with the first oil outlet 13, and the lower end communicates with the pipeline of the engine.

[0048] A drain pipe 15 is vertically constructed on the pump core support 1. The upper end of the drain pipe 15 communicates with the pressure relief port 10. A injection pipe 16 is horizontally penetrated through the bottom of the oil receiving seat 12. An ejection channel 17 is formed in the injection pipe 16. The inner end of the injection pipe 16 is communicated with the lower end of the drain pipe 15. A jet nozzle 18 is clamped inside the injection pipe 16. The nozzle end of the jet nozzle 18 faces the outer end of the injection pipe 16.

[0049] The fuel pump assembly further includes a secondary fuel tank arranged below the main fuel tank. The lower end of the injection pipe 16 is communicated with an ejection suction nozzle 19. The ejection suction nozzle 19 extends out of the lower end of the flange cover member 2 and is communicated with the oil outlet of the secondary fuel tank.

[0050] In the above technical solution, fuel is filtered through a filter screen and enters the pump core. The fuel pump core provides power for the fuel flow. The fuel passes through a pressure regulating valve, and the pressure regulating valve ensures the stability of the pipeline pressure. The fuel passes through a filter element for fine filtration to ensure the purity of the fuel delivered to the engine. The oil outlet pipe 14 is connected to the engine pipeline to output fuel and complete the fuel output of the fuel pump.

[0051] Basically, existing motorcycles do not carry a secondary fuel tank, and the volume of the main fuel tank of a motorcycle is often relatively small and cannot meet the demand for long endurance. If a secondary fuel tank is carried, another fuel pump is often required, especially when the secondary fuel tank is carried at a low position, and adding a fuel pump will inevitably increase the vehicle cost and occupy vehicle space.

[0052] In this solution, a drain pipe communicated with the pressure regulating valve is arranged on the main fuel tank. The lower end of the drain pipe is connected to the injection pipe. A jet nozzle is provided at the connection of the injection pipe. The lower end of the injection pipe is provided with an ejection suction nozzle connected to the oil outlet of the secondary fuel tank.

[0053] The fuel discharged from the pressure relief valve at the pressure valve enters the drain pipe. Under the action of the jet nozzle, the fuel flow rate increases and the pressure decreases, forming a low-pressure area, so that the fuel in the secondary fuel tank is in a high-pressure area. The fuel flows from the high-pressure area to the low-pressure area to achieve the purpose of sucking fuel from the secondary fuel tank at a lower position to a higher position, thus solving the problem of fuel use when a motorcycle is equipped with only one fuel pump and the secondary fuel tank is carried at a low position, improving the fuel usage, reducing the cost of adding a fuel pump, and reducing the installation space.

[0054] Further, a jet nozzle seat 20 is butt-connected to the bottom of the drain pipe 15. A short pipe 21 is horizontally constructed at the lower end of the jet nozzle seat 20 and is clamped with the input end of the jet nozzle 18. In this technical solution, the jet nozzle seat 20 is used to connect and stabilize the drain pipe and the jet nozzle 18.

[0055] Further, a plurality of first support plates 22 are constructed at the lower end of the short pipe 21 to support against the flange cover member 2, and a second support plate 23 is constructed at the side portion of the short pipe 21 to support against the pump core bracket 1. In this technical solution, the arrangement of the first support plate 22 and the second support plate 23 enables the jet nozzle seat 20 to be abutted against the flange cover member 2 and the pump core bracket 1, which is more stable and reliable.

[0056] Further, a second oil outlet 24 is formed at the outer end of the injection pipe 16. An umbrella valve bracket 25 is hingedly provided at the side portion of the oil receiving seat 12. An umbrella valve 26 is fitted at the outer end of the second oil outlet 24. The acting end of the umbrella valve bracket 25 is clamped to the outer end of the umbrella valve 26. In this technical solution, the cooperation between the umbrella valve 26 and the umbrella valve bracket 25 is used to control the flow rate of the injected fuel, and it has good oil and temperature resistance performance.

[0057] Further, a sealing shell 27 is provided on the pump core bracket 1 below the lower oil port 11. A filter cavity is formed inside the sealing shell 27. A filter element 28 is provided inside the filter cavity. A stepped step is formed on the oil receiving seat 12. The lower end of the sealing shell 27 and the filter element 28 are abutted against the stepped step. In this technical solution, the filter element 28 is used to finely filter the fuel to make the fuel purer for the engine to use.

[0058] Further, at least two symmetric clamping blocks 29 are constructed on the side wall of the three-way seat 8. A pressure regulating valve buckle 30 is provided outside the pressure regulating valve 4. A bayonet 31 for snap-connecting with the clamping block 29 is formed on the pressure regulating valve buckle 30. In this technical solution, the pressure regulating valve buckle 30 is used to fix the pressure regulating valve 4 on the three-way seat 8 to prevent the pressure regulating valve 4 from coming off.

[0059] Further, an oil return nozzle 32 is penetrated through the flange cover member 2. The lower end of the oil return nozzle 32 is communicated with the oil inlet of the auxiliary fuel tank. A jack 33 is opened on the pump core bracket 1. An oil return pipe 34 is inserted into the jack 33. The lower end of the oil return pipe 34 is docked with the upper end of the oil return nozzle 32. In this technical solution, when the amount of fuel in the main fuel tank is relatively large and higher than the upper surface of the oil return pipe, the oil return pipe discharges the fuel inhaled into the main fuel tank back to the auxiliary fuel tank through the oil return nozzle, avoiding the overflow of the main fuel tank due to continuous fuel inhalation.

[0060] Furthermore, the filter 5 is in an "L" shape and includes a first filter body arranged horizontally and a second filter body arranged vertically. A slot 35 is formed between the flange cover component 2, the fuel pump core 3 and the pump core bracket 1. The first filter body is clamped and arranged between the flange cover component 2 and the bottom of the fuel pump core 3. The second filter body is arranged on the slot 35. The first filter body is provided with a filter oil outlet 36 docked with the oil inlet of the fuel pump core 3. The side of the filter oil outlet 36 is provided with a slot 37 docked with a post 38 at the bottom of the fuel pump core 3. In this technical solution, the filter 5 is used to filter fuel. The filtered fuel is sucked into the fuel pump core 3 through the filter oil outlet 36. The slot 37 and the post 38 facilitate the positioning and installation between the fuel pump core 3 and the filter 5, as well as the connection stability.

[0061] Further, the pump core bracket 1 is provided with a pump core outer frame 39 which is covered on the outside of the fuel pump core 3, and a clamping block 40 is formed on the pump core outer frame 39 and the side wall of the sealing shell 27, and the lower end of the side wall of the clamping block 40 is inclined, and the upper end of the oil receiving seat 12 is extended upward on both sides to form a first clamping plate 41, and the two sides of the pump core outer frame 39 are formed with insertion openings 42, and the flange cover component 2 is extended upward to form a second clamping plate 43, and the second clamping plate 43 passes through the insertion opening 42 and is arranged on the outside of the fuel pump core 3, and the first clamping plate 41 and the second clamping plate 43 form a clamping interface 44 that cooperates with the clamping block 40. In this technical solution, the lower end of the side wall of the clamping block 40 is inclined, which can facilitate the assembly of the clamping interface 44 and the clamping block 40 to realize the clamping of the pump core bracket 1 and the flange cover component 2, and the setting of the insertion opening 42 can make the second clamping plate 43 stably clamped into the pump core outer frame 39, thereby improving the structural stability.

[0062] Furthermore, a fixing plate 45 is provided at the bottom of the flange cover component 2, a sealing groove 46 is formed on the outer side of the lower part of the flange cover component 2, a sealing gasket 47 is provided in the sealing groove 46, and a clamping protrusion 53 is provided on both sides of the sealing gasket 47 in the circumferential direction; a sensor assembly is provided on the pump core bracket 1, including a sensor 48 and a float; a ring-shaped socket is provided at the bottom of the flange cover component 2, and an oil pump positive electrode 49, an oil pump negative electrode 50, a sensor positive electrode 51 and a sensor negative electrode 52 are provided in the ring-shaped socket. In this technical solution, the sealing gasket 47 improves the sealing performance, and the clamping protrusion 53 improves the assembly stability of the sealing gasket 47; the sensor 48 and the float are used to measure the fuel quantity.

[0063] It should also be noted that the sealing ring 100 on each component can improve the sealing performance.

[0064] In this specific embodiment, aiming at the situation that the volume of the existing main fuel tank of a motorcycle is often relatively small and cannot meet the demand for long endurance, while mounting a secondary fuel tank often requires another fuel pump. Especially when the secondary fuel tank is mounted at a lower position, adding a fuel pump will inevitably increase the vehicle cost and occupy vehicle space. The above solution is to set a drainage pipe communicating with a pressure regulating valve on the main fuel tank. The lower end of the drainage pipe is connected to a jet pipe. A jet nozzle is provided at the connection on the jet pipe. The lower end of the jet pipe is provided with an ejector suction nozzle connected to the oil outlet of the secondary fuel tank. The fuel released at the pressure valve enters the drainage pipe. Under the action of the jet nozzle, the fuel flow rate increases and the pressure decreases, forming a low-pressure area, so that the fuel in the secondary fuel tank is in a high-pressure area. The fuel flows from the high-pressure area to the low-pressure area to achieve the purpose of sucking fuel from the secondary fuel tank at a lower position to a higher position, thus solving the problem of fuel use of a motorcycle when only one fuel pump is installed and the secondary fuel tank is mounted at a lower position, improving the fuel usage, reducing the cost of adding a fuel pump, and reducing the installation space.

[0065] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0066] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and purposes of the present invention.

Claims

1. A fuel pump assembly for a motorcycle, comprising a main fuel tank, the main fuel tank including a snap-connected pump core bracket (1) and a flange cover member (2), as well as a fuel pump core (3), a pressure regulating valve (4) and a filter screen (5) provided on the pump core bracket (1); an oil inlet pipe (6) is constructed on the upper part of the pump core bracket (1), and one side of the oil inlet pipe (6) is communicated with the oil outlet (7) of the fuel pump core; characterized in that: On the other side of the inlet oil pipe (6), a three-way seat (8) is fixedly provided. An upper oil port (9), a pressure relief port (10), and a lower oil port (11) are formed in the three-way seat (8). The pressure regulating valve (4) is installed in the three-way seat (8), and the pressure relief nozzle of the pressure regulating valve (4) is inserted into the pressure relief port (10). The upper oil port (9) is communicated with the inlet oil pipe (6). An oil receiving seat (12) is provided on the flange cover component (2). A first oil outlet (13) is provided at the bottom of the oil receiving seat (12). The lower oil port (11) is communicated with the first oil outlet (13). An oil outlet pipe (14) is provided at the bottom of the flange cover component (2). The upper end of the oil outlet pipe (14) is communicated with the first oil outlet (13), and the lower end is communicated with the pipeline of the engine. A drainage pipe (15) is vertically constructed on the pump core support (1). The upper end of the drainage pipe (15) is communicated with the pressure relief port (10). A jet pipe (16) is horizontally penetrated through the bottom of the oil receiving seat (12). An ejection channel (17) is formed in the jet pipe (16). The inner end of the jet pipe (16) is communicated with the lower end of the drainage pipe (15). A jet nozzle (18) is clamped in the jet pipe (16), and the nozzle end of the jet nozzle (18) faces the outer end of the jet pipe (16). The fuel pump assembly further includes a secondary fuel tank, which is arranged below the main fuel tank. The lower end of the jet pipe (16) is communicated with an ejection suction nozzle (19), and the ejection suction nozzle (19) extends out of the lower end of the flange cover component (2) and is communicated with the oil outlet of the secondary fuel tank. A jet nozzle seat (20) is butt-connected to the bottom of the drainage pipe (15). A short pipe (21) is horizontally constructed at the lower end of the jet nozzle seat (20) and is clamped with the input end of the jet nozzle (18). A plurality of first support plates (22) are constructed at the lower end of the short pipe (21) to support the flange cover component (2). A second support plate (23) is constructed on the side of the short pipe (21) to support the pump core support (1). A second oil outlet (24) is formed at the outer end of the jet pipe (16). An umbrella valve support (25) is hinged to the side of the oil receiving seat (12). An umbrella valve (26) is attached to the outer end of the second oil outlet (24). The acting end of the umbrella valve support (25) is clamped to the outer end of the umbrella valve (26). A sealing shell (27) is provided on the pump core support (1) below the lower oil port (11). A filtering cavity is formed in the sealing shell (27). A filter element (28) is provided in the filtering cavity. A stepped step is formed on the oil receiving seat (12). The lower end of the sealing shell (27) and the filter element (28) abut against the stepped step.

2. The fuel pump assembly for a motorcycle according to claim 1, characterized in that: At least two symmetric clamping blocks (29) are constructed on the side wall of the three-way seat (8). A pressure regulating valve buckle (30) is provided on the outside of the pressure regulating valve (4). A clamping opening (31) for snap-connecting with the clamping block (29) is formed on the pressure regulating valve buckle (30).

3. The fuel pump assembly for a motorcycle according to claim 1, wherein: An oil return nozzle (32) is inserted through the flange cover component (2). The lower end of the oil return nozzle (32) is communicated with the oil inlet of the auxiliary fuel tank. A jack (33) is formed on the pump core bracket (1), and an oil return pipe (34) is inserted into the jack (33). The lower end of the oil return pipe (34) is docked with the upper end of the oil return nozzle (32).

4. A fuel pump assembly for a motorcycle according to claim 1, characterized in that: The filter screen (5) is in an "L" shape and includes a horizontally arranged first filter body and a vertically arranged second filter body. A slot (35) is formed between the flange cover component (2), the fuel pump core (3) and the pump core bracket (1). The first filter body is clamped between the flange cover component (2) and the bottom of the fuel pump core (3). The second filter body is arranged on the slot (35). A filtered oil outlet (36) docked with the oil inlet of the fuel pump core (3) is formed on the first filter body. A clamping groove (37) is formed on the side of the filtered oil outlet (36) and is docked with a clamping post (38) at the bottom of the fuel pump core (3).

5. A fuel pump assembly for a motorcycle according to claim 1, characterized in that: A pump core outer frame (39) covering the outside of the fuel pump core (3) is arranged on the pump core bracket (1). A clamping block (40) is formed between the pump core outer frame (39) and the side wall of the sealing shell (27). The lower end side wall of the clamping block (40) is in an inclined plane. First clamping plates (41) extending upward are formed on both sides of the upper end of the oil receiving seat (12). Insertion openings (42) are formed on both sides of the pump core outer frame (39). Second clamping plates (43) extending upward are formed on the flange cover component (2). The second clamping plates (43) pass through the insertion openings (42) and are arranged outside the fuel pump core (3). The first clamping plates (41) and the second clamping plates (43) form a clamping interface (44) cooperating with the clamping block (40).

6. The fuel pump assembly for a motorcycle according to claim 5, characterized in that: A fixing plate (45) is arranged at the bottom of the flange cover component (2). A sealing groove (46) is formed on the outer side of the lower part of the flange cover component (2). A sealing gasket (47) is arranged in the sealing groove (46). Clamping protrusions (53) are arranged circumferentially on both sides of the sealing gasket (47). A sensor assembly including a sensor (48) and a float is arranged on the pump core bracket (1). A circular socket is arranged at the bottom of the flange cover component (2). An oil pump positive electrode (49), an oil pump negative electrode (50), a sensor positive electrode (51) and a sensor negative electrode (52) are arranged in the circular socket.

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