An injection pipe assembly and a fuel pump assembly using the same assembly.

Abstract

This utility model relates to a multifunctional injection pipe assembly and a fuel pump assembly using this assembly. The injection pipe assembly includes an upper transverse pipe and a lower transverse pipe, with the lower transverse pipe connected to the lower part of the upper transverse pipe. The upper transverse pipe is characterized by having a first longitudinal pipe, a second longitudinal pipe, and a third longitudinal pipe connected to it, all communicating with the upper transverse pipe. The lower transverse pipe is connected to a fuel return port, within which an injection pipe is located. The injection pipe is positioned below the upper transverse pipe and below the first longitudinal pipe, with an injection nozzle facing the lower transverse pipe. Three fuel pump assemblies using this injection pipe assembly are also provided. Through improvements to the injection pipe assembly, this injection pipe assembly and the fuel pump assemblies using it enable the fuel pump assembly to achieve different functions.

Description

Technical Field

[0001] This utility model relates to a fuel pump assembly and an injection pipe assembly used in the fuel pump assembly. Background Technology

[0002] A fuel pump assembly is a device that delivers fuel from the fuel tank into the fuel supply line to power the engine. Current fuel pump assemblies generally include a main tank, a fuel pump, a filter, and an injection pipe assembly. The fuel pump pumps fuel into the filter, where it is filtered before entering the fuel supply line. Some fuel tanks are saddle-shaped, comprising a main tank and a secondary tank. By installing an injection pipe assembly, fuel from the secondary tank can be diverted to the main tank. However, due to differences in vehicle models and varying requirements from automakers, fuel pump assemblies need to perform different functions. Current injection pipe assemblies have a simple structure and cannot meet the needs of multiple scenarios. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, this utility model innovatively provides a multifunctional injection pipe assembly and a fuel pump assembly using the assembly.

[0004] This injection pipe assembly includes an upper transverse pipe and a lower transverse pipe, the lower transverse pipe being connected to the lower part of the upper transverse pipe. The upper transverse pipe is characterized by having a first longitudinal pipe, a second longitudinal pipe, and a third longitudinal pipe connected to it, all of which communicate with the upper transverse pipe. The lower transverse pipe is connected to an oil return port, and an injection pipe is provided within the oil return port. The injection pipe is located below the upper transverse pipe and below the first longitudinal pipe. The injection pipe has an injection nozzle facing the lower transverse pipe.

[0005] A fuel pump assembly includes a main tank, a fuel pump, a filter, and the aforementioned injection pipe assembly. The filter includes a filter housing, a filter cover, and a filter element. The filter element is installed inside the filter housing, and the filter cover is connected to the filter housing. The filter cover has an inlet port and an outlet port. The fuel pump is connected to the inlet port of the filter. The filter housing has a first outlet pipe communicating with the inner cavity of the filter housing. The first outlet pipe communicates with a first longitudinal pipe of the injection pipe assembly. A conical injection hole is provided in the upper transverse pipe, located between the first longitudinal pipe and a second longitudinal pipe. The lower end of the second longitudinal pipe is close to the small hole of the conical injection hole. The second longitudinal pipe is used to connect to an auxiliary fuel tank, and the third longitudinal pipe is used to connect to the main tank.

[0006] The bottom of the main tank has an oil inlet, and a second injection pipe assembly is installed inside the oil inlet. The second injection pipe assembly includes a second connecting pipe and a second injection pipe. The second connecting pipe is connected to the filter housing and the second injection pipe is connected. The upper end of the second injection pipe has a second injection nozzle. The bottom of the main tank is provided with an oil inlet cone that communicates with the main tank. The second injection nozzle is located inside the oil inlet cone of the main tank 1.

[0007] A fuel pump assembly includes a main tank, a fuel pump, a filter, and the aforementioned injection pipe assembly. The filter includes a filter housing and a filter cover, with the filter cover connected to the filter housing. The filter cover has a return oil inlet and a return oil outlet, which communicate with each other. The filter housing has a connecting pipe that is not connected to the inner cavity of the filter housing. The connecting pipe is connected to a first longitudinal pipe of the injection pipe assembly. A first partition is provided inside the upper transverse pipe, located between a second longitudinal pipe and a third longitudinal pipe. The first longitudinal pipe communicates with the injection pipe, and the second longitudinal pipe is used to communicate with the fuel pump.

[0008] A fuel pump assembly includes a main tank, a fuel pump, a filter, and the aforementioned injection pipe assembly. The filter includes a filter housing, a filter cover, and a filter element. The filter element is installed inside the filter housing, and the filter cover is connected to the filter housing. The filter cover has an inlet port and an outlet port. The fuel pump is connected to the inlet port of the filter. The filter housing has a second outlet pipe communicating with the inner cavity of the filter housing. The second outlet pipe communicates with a first longitudinal pipe of the injection pipe assembly. A second partition is provided inside the upper transverse pipe, located between the second and third longitudinal pipes. The second longitudinal pipe is used to connect to an injection assembly in an auxiliary fuel tank.

[0009] According to the present invention, an injection pipe assembly and a fuel pump assembly using the same assembly are provided. By improving the injection pipe assembly, the fuel pump assembly can achieve different functions. Attached Figure Description

[0010] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a cross-sectional schematic diagram of the injection pipe assembly; Figure 4 This is a cross-sectional schematic diagram of Example 1. Figure 2 (Cross-sectional view along the AA direction). Figure 5 This is a cross-sectional schematic diagram of Example 2; Figure 6This is a cross-sectional schematic diagram of Example 3; Figure 7 This is a bottom view of the present invention; Figure 8 for Figure 1 A cross-sectional view along the BB direction. Detailed Implementation

[0011] like Figure 3 As shown, this injection pipe assembly includes an upper transverse pipe 44 and a lower transverse pipe 45. The lower transverse pipe 45 is connected to the lower part of the upper transverse pipe 44. A first longitudinal pipe 41, a second longitudinal pipe 42, and a third longitudinal pipe 43 are connected to the upper transverse pipe 44. The first longitudinal pipe 41, the second longitudinal pipe 42, and the third longitudinal pipe 43 are all connected to the upper transverse pipe 44. The lower transverse pipe 45 is connected to the oil return port 46. An injection pipe 47 is provided in the oil return port 46. The injection pipe 47 is located below the upper transverse pipe 44 and below the first longitudinal pipe 41. The injection pipe 47 has an injection nozzle 48 facing the lower transverse pipe 45. The injection nozzle 48 faces the lower transverse pipe 45.

[0012] This invention utilizes the aforementioned injection pipe assembly to assemble three different types of fuel pump assemblies.

[0013] Example 1: As Figure 1 and Figure 2 As shown, this fuel pump assembly includes a main tank 1, a fuel pump 2, a filter 3, and an injection pipe assembly 4. Figure 4 As shown, the filter 3 includes a filter housing 30, a filter cover 31, and a filter element 32. The filter element 32 is installed inside the filter housing 30, and the filter cover 31 is connected to the filter housing 30. The filter cover 31 is provided with an oil inlet 33 and an oil outlet 34. The oil pump 2 is connected to the oil inlet 33 of the filter 3, and the oil pump 2 pumps fuel from the fuel tank into the inner cavity of the filter housing. After being filtered by the filter element 32, the fuel exits from the oil outlet 34. Figure 4As shown, the filter housing 30 is provided with a first oil outlet pipe 35 that communicates with the inner cavity of the filter housing. The first oil outlet pipe 35 communicates with the first longitudinal pipe 41 of the injection pipe assembly 4. The upper transverse pipe 44 is provided with a conical injection hole 49. The conical injection hole 49 is located between the first longitudinal pipe 41 and the second longitudinal pipe 42. The lower end of the second longitudinal pipe 42 is close to the small hole of the conical injection hole 49. The second longitudinal pipe 42 is used to connect to the auxiliary oil tank, and the third longitudinal pipe 43 is used to connect to the main tank 1. When this fuel pump assembly is working, the fuel pump 2 pumps fuel from the fuel tank into the filter housing cavity. The fuel in the filter housing cavity enters the first longitudinal pipe 41 through the first outlet pipe 35. The fuel is then sprayed out through the conical injection hole 49. A vacuum is generated at the front end of the conical injection hole 49 (air and fuel are sprayed forward, forming a low-pressure area). Because the lower end of the second longitudinal pipe 42 is close to the small hole of the conical injection hole 49, the second longitudinal pipe 42 generates negative pressure. Fuel from the auxiliary fuel tank can be drawn in through the second longitudinal pipe 42. The fuel sprayed from the conical injection hole 49 and the fuel drawn in by the second longitudinal pipe 42 are then sent into the fuel tank where the fuel pump assembly is located through the third longitudinal pipe 43 (see...). Figure 4 (The direction of the arrow in the image).

[0014] To keep the main tank 1 full of oil, such as Figure 7 and Figure 8 As shown, the bottom of the main tank 1 has an oil inlet 10, and a second injection pipe assembly 5 is installed inside the oil inlet 10. The second injection pipe assembly 5 includes a second connecting pipe 50 and a second injection pipe 51. The second connecting pipe 50 is connected to the filter housing 30, and the second connecting pipe 50 is connected to the second injection pipe 51. The upper end of the second injection pipe 51 has a second injection nozzle 52. The bottom of the main tank 1 is provided with an oil inlet cone 11 that communicates with the main tank 1. The second injection nozzle 52 is located inside the oil inlet cone 11 of the main tank 1. During operation, the pressure from the filter forces fuel into the second connecting pipe 50 of the second injection pipe assembly 5. The fuel in the second connecting pipe 50 then enters the second injection pipe 51. The fuel in the second injection pipe 51 is then injected upwards through the second injection nozzle 52 at its upper end into the inlet cone 11 of the main barrel 1. Through the Bernoulli air suction principle (same as the injection and diversion principle above), static fuel outside the main barrel 1 is drawn into the main barrel 1 through the inlet 10 and the inlet cone 11, thus keeping the main barrel 1 full of fuel.

[0015] Example 2: Figure 1 As shown, this fuel pump assembly includes a main tank 1, a fuel pump 2, a filter 3, and an injection pipe assembly 4. The filter 3 includes a filter housing 30 and a filter cover 31. The filter cover 31 is connected to the filter housing 30. The filter cover 31 is provided with a return oil inlet 36 and a return oil outlet 37. The return oil inlet 36 and the return oil outlet 37 communicate with each other. Figure 5As shown, the filter housing 30 is provided with a connecting pipe 38 that is not connected to the inner cavity of the filter housing 30. The connecting pipe 38 is connected to the first longitudinal pipe 41 of the injection pipe assembly 4. The upper transverse pipe 44 is provided with a first partition 441. The first partition 441 is located between the second longitudinal pipe 42 and the third longitudinal pipe 43. The first longitudinal pipe 41 is connected to the injection pipe 47, and the second longitudinal pipe 42 is used to connect to the oil pump. When this fuel pump assembly is working, the fuel pump 2 pumps fuel into the second longitudinal pipe 42 through a pipe. The fuel in the second longitudinal pipe 42 flows into the injection pipe 47. The fuel in the injection pipe 47 is injected forward into the lower transverse pipe 45 through the injector 48. A vacuum is created at the front end of the injector 48 (air and fuel are injected forward, forming a low-pressure area). The fuel at the bottom of the fuel tank flows into the lower transverse pipe 45 through the return port 46. The lower transverse pipe 45 delivers fuel into the fuel supply pipe. A blockage point 300 is provided on the filter housing 30 to prevent the connecting pipe 38 from communicating with the inner cavity of the filter housing 30, so that fuel only enters the injection pipe 47. The engine's return fuel flows back into the fuel tank through the return port 36 and the return outlet 37. This fuel pump assembly uses the filter 3 as a support, so there is no need to install a filter element, saving the cost of developing support molds. Of course, this fuel pump assembly is used in auxiliary fuel tanks or other special fuel tanks.

[0016] Example 3: This fuel pump assembly includes a main tank 1, a fuel pump 2, a filter 3, and an injection pipe assembly 4. The filter 3 includes a filter housing 30, a filter cover 31, and a filter element 32. The filter element 32 is installed inside the filter housing 30. The filter cover 31 is connected to the filter housing 30 and has an inlet port 33 and an outlet port 34. The fuel pump 2 is connected to the inlet port 33 of the filter 3. Figure 6As shown, the filter housing 30 is provided with a second oil outlet pipe 39 that communicates with the inner cavity of the filter housing 30. The second oil outlet pipe 39 communicates with the first longitudinal pipe 41 of the injection pipe assembly 4. The upper transverse pipe 44 is provided with a second partition 442, which is located between the second longitudinal pipe 42 and the third longitudinal pipe 43. The second longitudinal pipe 42 is used to connect with the ejector assembly in the auxiliary oil tank. When this fuel pump assembly is working, the fuel pump 2 pumps fuel from the fuel tank into the filter housing cavity. The fuel in the filter housing cavity enters the first longitudinal pipe 41 through the first outlet pipe 35. Since the upper transverse pipe 44 has a second partition 442 located between the second longitudinal pipe 42 and the third longitudinal pipe 43, the fuel in the first longitudinal pipe 41 enters the second longitudinal pipe 42. The second longitudinal pipe 42 is connected to the ejector assembly in the auxiliary fuel tank through a pipe (the ejector assembly is also the remote fuel suction assembly, which is existing technology. The ejector assembly includes an injector nozzle and a return pipe. The second longitudinal pipe 42 is connected to the injector nozzle. The injector nozzle sprays fuel to create a vacuum, and the return pipe forms a return flow). This ejector assembly can draw fuel from the auxiliary fuel tank and send it into the main fuel tank. Of course, the fuel pump assembly in embodiment three can also include a second injection pipe assembly 5 to keep the main tank 1 full of fuel.

Claims

1. A spray pipe assembly comprising an upper cross pipe (44) and a lower cross pipe (45) connected to the lower portion of the upper cross pipe (44), characterized in that: The upper transverse pipe (44) is connected to a first longitudinal pipe (41), a second longitudinal pipe (42), and a third longitudinal pipe (43). The first longitudinal pipe (41), the second longitudinal pipe (42), and the third longitudinal pipe (43) are all connected to the upper transverse pipe (44). The lower transverse pipe (45) is connected to the oil return port (46). The oil return port (46) is provided with an injection pipe (47). The injection pipe (47) is located below the upper transverse pipe (44) and below the first longitudinal pipe (41). The injection pipe (47) has an injection nozzle (48) facing the lower transverse pipe (45). The injection nozzle (48) faces the lower transverse pipe (45).

2. A fuel pump assembly comprising a main barrel (1), a fuel pump (2), a filter (3) and the injection pipe assembly (4) of claim 1, the filter (3) comprising a filter housing (30), a filter cover (31) and a filter element (32), the filter element (32) being installed in the filter housing (30), the filter cover (31) being connected to the filter housing (30), the filter cover (31) being provided with an oil inlet port (33) and an oil outlet port (34), the fuel pump (2) being connected to the oil inlet port (33) of the filter (3), characterized in that: The filter housing (30) is provided with a first oil outlet pipe (35) communicating with the inner cavity of the filter housing. The first oil outlet pipe (35) is connected to the first longitudinal pipe (41) of the injection pipe assembly (4). The upper transverse pipe (44) is provided with a conical injection hole (49). The conical injection hole (49) is located between the first longitudinal pipe (41) and the second longitudinal pipe (42). The lower end of the second longitudinal pipe (42) is close to the small hole of the conical injection hole (49). The second longitudinal pipe (42) is used to connect to the auxiliary oil tank. The third longitudinal pipe (43) is used to connect to the main tank (1).

3. A fuel pump assembly according to claim 2, wherein: The bottom of the main barrel (1) has an oil inlet (10), and a second injection pipe assembly (5) is installed inside the oil inlet (10). The second injection pipe assembly (5) includes a second connecting pipe (50) and a second injection pipe (51). The second connecting pipe (50) is connected to the filter housing (30), and the second connecting pipe (50) is connected to the second injection pipe (51). The upper end of the second injection pipe (51) has a second injection nozzle (52). The bottom of the main barrel (1) is provided with an oil inlet cone (11) that communicates with the main barrel (1). The second injection nozzle (52) is located inside the oil inlet cone (11) of the main barrel (1).

4. A fuel pump assembly comprising a main barrel (1), a fuel pump (2), a filter (3) and the injection pipe assembly (4) according to claim 1, wherein the filter (3) comprises a filter housing (30) and a filter cover (31), and the filter cover (31) is connected to the filter housing (30), characterized in that: The filter cover (31) is provided with an oil return port (36) and an oil return outlet (37). The oil return port (36) and the oil return outlet (37) are connected. The filter housing (30) is provided with a connecting pipe (38) that is not connected to the inner cavity of the filter housing (30). The connecting pipe (38) is connected to the first longitudinal pipe (41) of the injection pipe assembly (4). The upper transverse pipe (44) is provided with a first partition (441). The first partition (441) is located between the second longitudinal pipe (42) and the third longitudinal pipe (43). The first longitudinal pipe (41) is connected to the injection pipe (47). The second longitudinal pipe (42) is used to connect to the oil pump.

5. A fuel pump assembly comprising a main barrel (1), a fuel pump (2), a filter (3) and the injection pipe assembly (4) according to claim 1, wherein the filter (3) comprises a filter housing (30), a filter cover (31) and a filter element (32), the filter element (32) is installed in the filter housing (30), the filter cover (31) is connected to the filter housing (30), the filter cover (31) is provided with an oil inlet interface (33) and an oil outlet interface (34), and the fuel pump (2) is connected to the oil inlet interface (33) of the filter (3). The filter housing (30) is provided with a second oil outlet pipe (39) that communicates with the inner cavity of the filter housing (30). The second oil outlet pipe (39) communicates with the first longitudinal pipe (41) of the injection pipe assembly (4). The upper transverse pipe (44) is provided with a second partition (442). The second partition (442) is located between the second longitudinal pipe (42) and the third longitudinal pipe (43). The second longitudinal pipe (42) is used to connect with the ejector assembly in the auxiliary oil tank.

6. A fuel pump assembly according to claim 5, wherein: The bottom of the main barrel (1) has an oil inlet (10), and a second injection pipe assembly (5) is installed inside the oil inlet (10). The second injection pipe assembly (5) includes a second connecting pipe (50) and a second injection pipe (51). The second connecting pipe (50) is connected to the filter housing (30), and the second connecting pipe (50) is connected to the second injection pipe (51). The upper end of the second injection pipe (51) has a second injection nozzle (52). The bottom of the main barrel (1) is provided with an oil inlet cone (11) that communicates with the main barrel (1). The second injection nozzle (52) is located inside the oil inlet cone (11) of the main barrel (1).

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