Oil tank oil return device and vehicle
By setting up oil return channels of oil return components and Venturi structure in the fuel tank, the problem of insufficient oil output caused by fuel shaking is solved, and the oil outlet pipe is continuously sucked in fuel to ensure the normal operation of the engine.
Patent Information
- Application Number
- CN202422216957.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-10
AI Technical Summary
During the vehicle's operation, the fuel shaking in the fuel tank causes the outlet pipe to not absorb enough fuel, causing the rail pressure to fluctuate, and in severe cases, the engine is shut down.
The oil return assembly is set up in the oil tank body, including the oil outlet pipe and the oil return pipe, and the return oil passage of the Venturi structure is set up in the oil return pipe. The siphon effect is used to ensure that the fuel is filled with the through-trough and ensure that the oil outlet pipe always sucks enough fuel.
Through the siphon effect, ensure that the fuel outlet pipe continues to suck fuel, avoid engine shutdown, and ensure normal operation of the vehicle.
Smart Images
Figure CN223116186U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fuel tanks, and particularly relates to a fuel tank oil return device and a vehicle. Background Art
[0002] The vehicle fuel supply system is a system that supplies the fuel in the fuel tank to the engine in a certain order. The fuel supply method mainly adopts a fuel pump fuel supply system. However, when the vehicle is running, the fuel in the fuel tank will shake along with the vehicle, especially in harsh conditions: road bumps, vehicle going up and down slopes, and when there is less fuel in the fuel tank. The fuel shake causes the outlet pipe to be unable to suck enough fuel, thereby causing rail pressure fluctuations and the common rail pipe pressure limiting valve to open, and seriously causing the engine to stall. Content of the Utility Model
[0003] An embodiment of the utility model discloses a fuel tank oil return device and a vehicle, which are used to optimize the way of sucking fuel from the fuel tank by the outlet pipe, and thus solve the problem of being unable to suck enough fuel.
[0004] To achieve the above object, the embodiment of the utility model provides the following technical solutions:
[0005] In a first aspect, the utility model provides a fuel tank oil return device, including: a fuel tank body and an oil return assembly;
[0006] An outlet pipe and a return pipe are arranged in the fuel tank body, and the oil return assembly is arranged inside the fuel tank body and is used to connect the outlet pipe and the return pipe;
[0007] The oil return assembly includes a housing body. A through groove communicating with the fuel tank body is formed inside the housing body. An oil outlet channel and an oil return channel communicating with the through groove are also formed inside the housing body. The oil outlet channel is communicated with the outlet pipe, and the oil return channel is communicated with the return pipe;
[0008] An oil inlet is formed on one side of the housing body facing the bottom of the fuel tank body. The oil inlet is communicated with the oil return channel. The inner cavity structure of a partial pipe section of the oil return channel is arranged as a Venturi structure, and the oil inlet is communicated with the Venturi structure.
[0009] In this application, a fuel return assembly is additionally provided inside the fuel tank body. The fuel return assembly is used to connect the fuel outlet pipe and the fuel return pipe. At the same time, an oil inlet is provided in the fuel return assembly, and a fuel return passage with a Venturi structure is provided at the position connected to the oil inlet. Thus, when the fuel inside the fuel return pipe is transmitted through the fuel return passage, the fuel return passage with the Venturi structure will generate a certain negative pressure area at the position of the oil inlet. This part of the negative pressure area will further generate a siphon effect at the position of the oil inlet to promote a large amount of fuel to be sucked into the fuel return passage from the oil inlet, ensuring that the through groove inside the housing body is filled with fuel. And in this application, the fuel outlet passage is connected to the fuel outlet pipe, and the fuel return passage is connected to the fuel return pipe, further enabling the fuel outlet pipe to always suck in enough fuel, enabling the fuel pump to suck fuel as much as possible and ensuring the normal operation of the whole vehicle.
[0010] In some embodiments, the fuel return passage includes a main fuel return passage and a secondary fuel return passage. Both the main fuel return passage and the secondary fuel return passage are used to connect the fuel return pipe and the through groove, and the Venturi structure is arranged inside the main fuel return passage.
[0011] In some embodiments, the Venturi structure includes an oil inlet area, a negative pressure area, and an oil outlet area that are connected to each other. The oil inlet area is connected to the fuel return pipe, the oil outlet area is connected to the through groove, and the negative pressure area is connected to the oil inlet.
[0012] In some embodiments, the opening size of the oil outlet area is larger than the opening size of the oil inlet.
[0013] In some embodiments, the fuel return assembly further includes a first valve body, and the first valve body is arranged at the oil inlet.
[0014] In some embodiments, the first valve body is a one-way valve.
[0015] In some embodiments, the fuel return assembly further includes a second valve body, and the second valve body is arranged in the secondary fuel return passage.
[0016] In some embodiments, the second valve body is a safety valve, and the safety valve is used to always detect the pressure of the secondary fuel return passage and is used to control the opening and closing of the secondary fuel return passage.
[0017] In a second aspect, this application further provides a vehicle, including the fuel tank fuel return device as described in any one of the above and a vehicle body, and the fuel tank fuel return device is arranged inside the vehicle body.
[0018] In some embodiments, the vehicle further includes a filter, an oil pump, and a common rail pipe. The filter is disposed on the outlet pipe of the fuel tank oil return device. The oil pump is configured to connect the outlet pipe, the return pipe in the fuel tank oil return device, and the common rail pipe. One end of the common rail pipe is used to convey a part of the medium in the outlet pipe to the vehicle body, and the other end is communicated with the return pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 FIG. is a schematic diagram of a return oil assembly in a fuel tank oil return device provided by an embodiment of the present invention;
[0020] Figure 2 FIG. is a schematic diagram of the overall structure of a fuel tank oil return device provided by an embodiment of the present invention.
[0021] Wherein: 1 - fuel tank body, 11 - through groove, 12 - outlet pipe, 13 - return pipe, 2 - filter, 3 - oil pump, 41 - first valve body, 42 - second valve body, 5 - inlet, 6 - inlet passage, 7 - return passage, 71 - main return passage, 72 - sub-return passage, 8 - inlet area, 81 - negative pressure area, 82 - outlet area, 9 - common rail pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B may mean A or B; "and / or" in the text is only a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.
[0023] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating 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 embodiments of the present application, unless otherwise specified, the meaning of "a plurality" is two or more than two.
[0024] An embodiment of the present invention discloses a fuel tank oil return device and a vehicle, which are used to optimize the way of sucking fuel from the fuel tank into the outlet pipe, and further solve the problem of not being able to suck enough fuel.
[0025] To achieve the above object, the embodiments of the present utility model provide the following technical solutions:
[0026] Please refer to Figure 1 , in the first aspect, the present utility model provides an oil tank oil return device, including: an oil tank body 1 and an oil return assembly;
[0027] An oil outlet pipe 12 and an oil return pipe 13 are arranged in the oil tank body 1, and the oil return assembly is arranged inside the oil tank body 1 and is used to connect the oil outlet pipe 12 and the oil return pipe 13;
[0028] The oil return assembly includes a housing body. A through groove 11 communicating with the oil tank body 1 is formed inside the housing body. An oil outlet channel 6 and an oil return channel 7 communicating with the through groove 11 are also formed inside the housing body. The oil outlet channel 6 is connected to the oil outlet pipe 12, and the oil return channel 7 is connected to the oil return pipe 13;
[0029] An oil inlet 5 is provided on one side of the housing body facing the bottom of the oil tank body 1. The oil inlet 5 is connected to the oil return channel 7. The inner cavity structure of a partial pipe section of the oil return channel 7 is set as a Venturi structure, and the oil inlet 5 is connected to the Venturi structure.
[0030] In this application, an oil return assembly is additionally arranged in the oil tank body 1. The oil return assembly is used to connect the oil outlet pipe 12 and the oil return pipe 13. At the same time, an oil inlet 5 is also provided in the oil return assembly, and an oil return channel 7 with a Venturi structure is also arranged at the position connected to the oil inlet 5. Thus, when the fuel in the oil return pipe 13 is transmitted through the oil return channel 7, the oil return channel 7 with the Venturi structure will generate a certain negative pressure area 81 at the position of the oil inlet 5. This part of the negative pressure area 81 will further generate a siphon effect on the position of the oil inlet 5 to promote the fuel to be largely sucked into the oil return channel 7 from the oil inlet 5, ensuring that the through groove 11 inside the housing body is filled with fuel. And in this application, the oil outlet channel 6 is connected to the oil outlet pipe 12, and the oil return channel 7 is connected to the oil return pipe 13, further enabling the oil outlet pipe 12 to always suck enough fuel, enabling the oil pump 3 to suck the fuel as much as possible and ensuring the normal operation of the whole vehicle.
[0031] Furthermore, please refer to Figure 1 , the oil return channel 7 includes a main oil return channel 71 and a secondary oil return channel 72. Both the main oil return channel 71 and the secondary oil return channel 72 are used to connect the oil return pipe 13 and the through groove 11. The Venturi structure is arranged inside the main oil return channel 71. Among them, the fuel enters the oil return channel 7 from the oil return pipe 13. And in this application, the oil return channel 7 is set as the main oil return channel 71 and the secondary oil return channel 72, so that the fuel in the oil return pipe 13 can be shunted in this application, ensuring that the oil pressure inside the oil return channel 7 will not be too high.
[0032] Furthermore, please refer toFigure 1 , the Venturi structure includes a connected fuel inlet area 8, a negative pressure area 81, and a fuel outlet area 82. The fuel inlet area 8 is connected to the return oil pipe 13, the fuel outlet area 82 is connected to the through groove 11, and the negative pressure area 81 is connected to the fuel inlet 5. In the above structure, the Venturi structure of the present application includes a connected fuel inlet area 8, a negative pressure area 81, and a fuel outlet area 82. Among them, the fuel inlet area 8 is connected to the return oil passage 7, and the fuel outlet area 82 is connected to the through groove 11. The formed negative pressure area 81 will cause a negative pressure area 81 at the position of the fuel inlet 5. At the same time, the negative pressure area 81 will cause a siphon phenomenon at the position of the fuel inlet 5, so that the fuel can be greatly sucked into the return oil passage 7 from the fuel inlet 5, ensuring that the through groove 11 inside the housing body is filled with fuel. Furthermore, when there is fuel in the fuel tank, the fuel outlet pipe 12 can always suck fuel.
[0033] Furthermore, the opening size of the fuel outlet area 82 is larger than the opening size of the fuel inlet 5. The present application sets the opening size of the fuel outlet area 82 to be larger than the opening size of the fuel inlet 5, which can be twice, three times, etc. of the opening size of the fuel inlet 5. The present application does not make specific limitations on this. The purpose of this design of the present application is to facilitate the fuel outlet area 82 to quickly suck the fuel inside the secondary return oil passage 72 and the fuel inlet 5.
[0034] Furthermore, please refer to Figure 1 , the return oil assembly further includes a first valve body 41. The first valve body 41 is arranged at the fuel inlet 5. The first valve body 41 is a one-way valve. The present application arranges the first valve body 41 at the fuel inlet 5 and sets it as a one-way valve. First, it can make the fuel inlet 5 better connect the through groove 11 and the fuel tank body 1. Using a one-way valve can effectively prevent the fuel entering the housing body from flowing out.
[0035] Furthermore, please refer to Figure 1 , the return oil assembly further includes a second valve body 42. The second valve body 42 is arranged in the secondary return oil passage 72. The second valve body 42 is a safety valve. The safety valve is used to always detect the pressure of the secondary return oil passage 72 and regulate the opening and closing of the secondary return oil passage 72. The present application arranges the second valve body 42 in the secondary return oil passage 72 and sets it as a safety valve, and regulates the opening and closing of the secondary return oil passage 72 in real time according to the pressure detected by the safety valve. When the pressure in the return oil passage 7 is relatively large, part of the fuel will enter the secondary return oil passage 72, so that the pressure detected by the safety valve becomes larger. At this time, it can be judged that the pressure in the entire return oil passage 7 is relatively large. At this time, the safety valve can be opened to dredge the secondary return oil passage 72. At this time, the fuel flow rate inside the through groove 11 is the sum of the flow rates of the secondary return oil passage 72, the main return oil passage 71, and the fuel inlet 5. Furthermore, the present application adopts the above design to ensure that the return oil pressure does not exceed the allowable limit value.
[0036] It should be noted that the direction indicated by the arrow in the figure is the direction of fuel operation.
[0037] In a second aspect, the present application further provides a vehicle, comprising a fuel tank oil return device as described in any one of the above and a vehicle body, and the fuel tank oil return device is disposed inside the vehicle body.
[0038] Furthermore, please refer to Figure 2 , the vehicle further comprises a filter 2, an oil pump 3, and a common rail pipe 9. The filter 2 is disposed on the outlet pipe 12 in the fuel tank oil return device. The oil pump 3 is used to connect the outlet pipe 12, the return pipe 13, and the common rail pipe 9 in the fuel tank oil return device. One end of the common rail pipe 9 is used to convey part of the medium in the outlet pipe 12 to the vehicle body, and the other end is communicated with the return pipe 13. The filter 2 in the present application filters impurities in the fuel, the oil pump 3 drives the conduction of the fuel, and the common rail pipe 9 is used to convey part of the medium in the outlet pipe 12 to the vehicle body to ensure the normal operation of the vehicle body.
[0039] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.
Claims
1. A fuel tank oil return device, characterized in that, include: Fuel tank body, oil return assembly; The oil tank body is provided with an oil outlet pipe and an oil return pipe, and the oil return assembly is arranged inside the oil tank body and is used to connect the oil outlet pipe and the oil return pipe; The oil return assembly comprises a shell body, a through groove communicating with the oil tank body is formed inside the shell body, an oil outlet channel and an oil return channel communicating with the through groove are also formed inside the shell body, the oil outlet channel is communicated with the oil outlet pipe, and the oil return channel is communicated with the oil return pipe; An oil inlet is provided on one side of the shell body toward the bottom of the oil tank body, the oil inlet is communicated with the oil return channel, the inner cavity structure of a part of the pipe section of the oil return channel is set as a Venturi structure, and the oil inlet is communicated with the Venturi structure.
2. The fuel tank oil return device according to claim 1, wherein, The oil return channel includes a main oil return channel and an auxiliary oil return channel. The main oil return channel and the auxiliary oil return channel are both used to connect the oil return pipe and the through groove. The Venturi structure is arranged inside the main oil return channel.
3. The fuel tank oil return device according to claim 1, characterized in that, The Venturi structure includes an oil inlet area, a negative pressure area, and an oil outlet area which are connected to each other. The oil inlet area is connected to the oil return pipe, the oil outlet area is connected to the through groove, and the negative pressure area is connected to the oil inlet.
4. The fuel tank oil return device according to claim 3, characterized in that, The opening size of the oil outlet area is larger than the opening size of the oil inlet.
5. The fuel tank oil return device according to claim 1, wherein, The oil return assembly further includes a first valve body, which is disposed at the oil inlet.
6. The fuel tank oil return device according to claim 5, characterized in that, The first valve body is a one-way valve.
7. The fuel tank oil return device according to claim 2, characterized in that, The oil return assembly further includes a second valve body, and the second valve body is arranged in the auxiliary oil return passage.
8. The fuel tank oil return device according to claim 7, characterized in that, The second valve body is a safety valve, and the safety valve is used to always detect the pressure of the auxiliary oil return channel and to regulate the opening and closing of the auxiliary oil return channel.
9. A vehicle, characterized in that, It comprises a fuel tank oil return device as described in any one of claims 1 to 8 and a vehicle body, wherein the fuel tank oil return device is arranged inside the vehicle body.
10. The vehicle according to claim 9, characterized in that, The vehicle also includes a filter, an oil pump, and a common rail pipe. The filter is arranged on the oil outlet pipe in the oil return device of the oil tank. The oil pump is used to connect the oil outlet pipe, the oil return pipe and the common rail pipe in the oil return device of the oil tank. One end of the common rail pipe is used to transport part of the medium in the oil outlet pipe to the vehicle body, and the other end is connected to the oil return pipe.