Fuel supply system for an engine and vehicle

Abstract

The utility model embodiment proposes an oil supply system of engine and vehicle relates to vehicle manufacturing technical field, include: main oil tank, main oil tank and engine are communicated through oil supply pipeline, auxiliary oil tank, auxiliary oil tank and main oil tank are communicated through siphon pipeline, and both ends of siphon pipeline respectively reach the bottom in main oil tank and the bottom in auxiliary oil tank, and the oil supply pipeline is communicated with main oil tank and auxiliary oil tank respectively and at least part is communicated between main oil tank and auxiliary oil tank, and one way valve subassembly is used for making the oil supply pipeline one way to the main oil tank and auxiliary oil tank and one way to the main oil tank and auxiliary oil tank. The utility model embodiment's oil supply system of engine, the oil liquid in auxiliary oil tank can pass through siphon pipeline and circulate to main oil tank, and then make main oil tank and auxiliary oil tank can supply oil to engine, simple structure, low cost of setting, convenient installation, low failure rate, can improve user experience, and can guarantee the reliability of main oil tank and auxiliary oil tank oil supply, simultaneously, one way valve subassembly can avoid appearing oil liquid back spray phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing technology, and in particular to an engine fuel supply system and a vehicle having the engine fuel supply system. Background Technology

[0002] With the development of the national economy and the continuous improvement of living standards, vehicles are becoming increasingly important in daily life and travel, and factors such as vehicle range are key considerations during vehicle manufacturing. Existing vehicles use dual fuel tanks to improve range by switching between a main and auxiliary fuel tank. However, switching between the main and auxiliary fuel tanks requires a multi-way valve, which is costly, difficult to install, has a high failure rate, and results in a poor user experience, indicating room for improvement. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an engine fuel supply system with a simple structure, low setup cost, convenient installation, and low failure rate. It improves the user experience, ensures the reliability of fuel supply from the main and auxiliary fuel tanks, avoids fuel backflow, and enhances operational reliability.

[0004] The fuel supply system of an engine according to an embodiment of the present invention includes: a main fuel tank, which is connected to the engine via a fuel supply pipeline, the fuel supply pipeline being equipped with a fuel suction pump; an auxiliary fuel tank, which is connected to the main fuel tank via a siphon pipeline, the two ends of the siphon pipeline extending to the bottom of the main fuel tank and the bottom of the auxiliary fuel tank respectively, and the bottom of the main fuel tank being located horizontally below the bottom of the auxiliary fuel tank; and a replenishment fuel pipeline, which is connected to the main fuel tank and the auxiliary fuel tank respectively and is at least partially connected between the main fuel tank and the auxiliary fuel tank, the replenishment fuel pipeline being equipped with a one-way valve assembly, the one-way valve assembly being used to allow the replenishment fuel pipeline to flow unidirectionally to the main fuel tank and the auxiliary fuel tank.

[0005] The engine fuel supply system according to this utility model embodiment, by setting a siphon pipe between the main fuel tank and the auxiliary fuel tank, and creating a height difference between the two tanks, allows all the fuel in the auxiliary tank to flow into the main fuel tank through the siphon pipe under the action of the siphon effect. This enables both the main and auxiliary tanks to supply fuel to the engine. The system has a simple structure, low setup cost, convenient installation, and low failure rate, improving user experience and ensuring the reliability of fuel supply from both tanks. Furthermore, a one-way valve assembly is installed in the replenishment line, allowing one-way flow between the replenishment line and both tanks, thus preventing fuel backflow, improving reliability, enhancing performance, and broadening applicability.

[0006] According to some embodiments of the present invention, the fuel supply system of an engine includes a fuel replenishment main line and a branch line. The branch line is connected to the main fuel tank and the auxiliary fuel tank respectively. One end of the fuel replenishment main line is connected to the branch line, and the other end is provided with a fuel replenishment port. The one-way valve assembly is located on the fuel replenishment main line.

[0007] According to some embodiments of the present invention, the fuel supply system of an engine includes a one-way valve assembly comprising a connector and a valve body, the valve body being mounted on the connector, the main fuel supply line comprising a first sub-section and a second sub-section, the fuel inlet being formed in the first sub-section, the first sub-section and the second sub-section being detachably connected to both ends of the connector, and the valve body being unidirectionally oriented along the distribution direction of the first sub-section and the second sub-section.

[0008] According to some embodiments of the present invention, in the fuel supply system of an engine, a first threaded portion is formed on the outer peripheral wall of one end of the connector, and a first threaded mating portion is provided on the inner peripheral wall of the first sub-segment, wherein the first threaded portion is threadedly connected to the first threaded mating portion. And / or, the outer peripheral wall of the other end of the connector is formed with a second threaded portion, and the inner peripheral wall of the second sub-segment is provided with a second threaded mating portion, and the second threaded portion is threadedly connected to the second threaded mating portion.

[0009] According to some embodiments of the present invention, in the fuel supply system of an engine, a tightening protrusion is formed on the outer peripheral wall of the connector. The tightening protrusion is formed between the first threaded portion and the second threaded portion and protrudes outward toward the outer peripheral wall of the connector.

[0010] According to some embodiments of the present invention, in the fuel supply system of an engine, the connector is provided with a snap-fit ​​portion, the valve body is provided with a snap-fit ​​mating portion, and the snap-fit ​​portion and the snap-fit ​​mating portion are snap-fitted together.

[0011] The fuel supply system of the engine according to some embodiments of the present invention further includes: a return gas pipeline, wherein the return gas pipeline is connected to the upper part of the main fuel tank, the upper part of the auxiliary fuel tank and the fuel replenishment pipeline respectively; And / or, the oil replenishment port is equipped with a vent valve.

[0012] According to some embodiments of the present invention, the fuel supply system of an engine includes a return gas pipeline including a main return gas pipeline and a return gas sub-pipeline. The return gas sub-pipeline is connected between the upper part of the main fuel tank and the upper part of the auxiliary fuel tank. One end of the main return gas pipeline is connected to the return gas sub-pipeline, and the other end is connected between the fuel filler port and the one-way valve assembly.

[0013] The fuel supply system of an engine according to some embodiments of the present invention further includes: a return oil line, wherein the return oil line is connected between the engine and the main fuel tank; And / or, the main oil tank is equipped with a first liquid level sensor; And / or, the auxiliary oil tank is equipped with a second liquid level sensor.

[0014] This utility model also proposes a vehicle.

[0015] The vehicle according to the embodiments of the present invention includes the fuel supply system of the engine described in any of the above claims.

[0016] The fuel supply systems of the vehicle and the engine described above have the same advantages over the prior art, which will not be elaborated here.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a simplified structural diagram of the fuel supply system of an engine according to an embodiment of the present utility model; Figure 2 This is a partial structural schematic diagram of the fuel supply system of an engine according to an embodiment of the present utility model; Figure 3 This is a structural schematic diagram of a one-way valve assembly according to an embodiment of the present utility model; Figure 4 This is a cross-sectional view of a one-way valve assembly according to an embodiment of the present utility model.

[0019] Figure label: Engine fuel supply system 100, Engine 101, Main oil tank 1, oil supply line 2, oil suction pump 21, oil return line 3, auxiliary oil tank 4, siphon line 5 Oil replenishment line 6, main oil replenishment line 61, first sub-section 611, oil replenishment port 612, vent valve 613, second sub-section 614, branch line 62. One-way valve assembly 7, connector 71, tightening protrusion 711, snap-fit ​​part 712, valve body 72, snap-fit ​​mating part 721. Return gas line 8, return gas main line 81, return gas sub-line 82. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Existing vehicles are equipped with dual fuel tanks to improve the vehicle's range by switching between the main fuel tank and the auxiliary fuel tank. However, switching between the main and auxiliary fuel tanks requires a multi-way valve, which is costly, difficult to install, has a high failure rate, and results in a poor user experience.

[0024] The following is for reference. Figures 1-4 The description of the engine oil supply system 100 according to the embodiment of the present utility model is as follows: it has a simple structure, low setup cost, convenient installation, low failure rate, can improve the user experience, and can ensure the reliability of oil supply from the main oil tank 1 and the auxiliary oil tank 4, avoid oil backflow, and improve the reliability of use.

[0025] like Figures 1-4 As shown, the fuel supply system 100 of an engine according to an embodiment of the present invention includes: a main fuel tank 1, an auxiliary fuel tank 4, and a fuel replenishment line 6.

[0026] The main fuel tank 1 is connected to the engine 101 via the fuel supply line 2. The fuel supply line 2 is equipped with a fuel suction pump 21. The auxiliary fuel tank 4 is connected to the main fuel tank 1 via a siphon line 5. The two ends of the siphon line 5 extend to the bottom of the main fuel tank 1 and the bottom of the auxiliary fuel tank 4, respectively. The bottom of the main fuel tank 1 is located horizontally below the bottom of the auxiliary fuel tank 4. The replenishment line 6 is connected to the main fuel tank 1 and the auxiliary fuel tank 4, and is at least partially connected between the main fuel tank 1 and the auxiliary fuel tank 4. The replenishment line 6 is equipped with a one-way valve assembly 7, which is used to allow the replenishment line 6 to flow unidirectionally to the main fuel tank 1 and the auxiliary fuel tank 4.

[0027] Specifically, the engine fuel supply system 100 is installed in the engine compartment of the vehicle 101 and is used to supply fuel to the engine 101. The engine fuel supply system 100 is equipped with two fuel tanks, namely the main fuel tank 1 and the auxiliary fuel tank 4. This increases the overall fuel storage capacity of the engine fuel supply system 100, which in turn increases the vehicle's range and improves the user experience. A fuel supply line 2 is provided between the main fuel tank 1 and the engine 101. The main fuel tank 1 can supply fuel to the engine 101 through the fuel supply line 2. The fuel supply line 2 is equipped with a suction pump 21, which can pump fuel from the main fuel tank 1 to the engine 101, thereby ensuring the reliability of the fuel supply to the engine 101 and ensuring the stable operation of the engine 101.

[0028] Furthermore, a siphon pipe 5 is provided between the auxiliary oil tank 4 and the main oil tank 1. The two ends of the siphon pipe 5 can extend from the upper ends of the main oil tank 1 and the auxiliary oil tank 4 into the main oil tank 1 and the auxiliary oil tank 4, respectively. The two ends of the siphon pipe 5 extend to the bottom of the main oil tank 1 and the bottom of the auxiliary oil tank 4, respectively. The bottom of the main oil tank 1 is located horizontally below the bottom of the auxiliary oil tank 4, so that there is a height difference between the main oil tank 1 and the auxiliary oil tank 4. One end of the siphon pipe 5 located in the main oil tank 1 can be set close to the oil supply pipe 2, so that when the oil suction pump 21 is running, the oil near the end of the siphon pipe 5 located in the main oil tank 1 is drawn away, thereby creating a pressure difference between the two ends of the siphon pipe 5 located in the main oil tank 1 and the auxiliary oil tank 4.

[0029] In this way, the oil in the auxiliary oil tank 4 can flow into the main oil tank 1 under the siphon effect, and the oil in the main oil tank 1 can supply oil to the engine 101, thereby doubling the oil storage capacity of the engine's fuel supply system 100 to increase the vehicle's range. The siphon pipe 5 has a simple structure, is easy to install, and has low installation cost. The height difference and pressure difference are sufficient to allow the oil in the auxiliary oil tank 4 to flow into the main oil tank 1, ensuring that the oil in the auxiliary oil tank 4 is completely delivered to the main oil tank 1, thereby reducing the failure rate and ensuring reliability.

[0030] Furthermore, the engine's fuel supply system 100 is also equipped with a fuel replenishment line 6, which is connected to the main fuel tank 1 and the auxiliary fuel tank 4 respectively. When the fuel in the main fuel tank 1 and the auxiliary fuel tank 4 is low or depleted, the user can replenish fuel to the main fuel tank 1 and the auxiliary fuel tank 4 through the fuel replenishment line 6 to ensure the vehicle's operating power. At least a portion of the fuel replenishment line 6 is connected between the main fuel tank 1 and the auxiliary fuel tank 4, allowing some fuel in the auxiliary fuel tank 4 to also flow into the main fuel tank 1 through the fuel replenishment line 6. The main oil tank 1 is replenished with oil. The replenishment pipeline 6 is equipped with a one-way valve assembly 7. The one-way valve assembly 7 is used to ensure that the replenishment pipeline 6 flows unidirectionally to the main oil tank 1 and the auxiliary oil tank 4. That is, when the user replenishes oil to the main oil tank 1 and the auxiliary oil tank 4 through the replenishment pipeline 6, the oil can only flow from the replenishment pipeline 6 to the main oil tank 1 or the auxiliary oil tank 4. The oil in the main oil tank 1 and the auxiliary oil tank 4 cannot be backflowed through the replenishment pipeline 6, thereby ensuring the reliability of the replenishment pipeline 6 and improving the user experience.

[0031] In actual setup, while ensuring a height difference between the main fuel tank 1 and the auxiliary fuel tank 4, the upper part of the main fuel tank 1 and the lower part of the auxiliary fuel tank 4 should be at similar heights in the horizontal direction. This can prevent problems such as leakage caused by excessive stress on the main fuel tank 1 or the auxiliary fuel tank 4, and ensure reliable operation.

[0032] According to the embodiment of the present invention, the engine fuel supply system 100, by setting a siphon pipe 5 between the main fuel tank 1 and the auxiliary fuel tank 4, and creating a height difference between the main fuel tank 1 and the auxiliary fuel tank 4, allows all the oil in the auxiliary fuel tank 4 to flow into the main fuel tank 1 through the siphon pipe 5 under the action of the siphon effect. This enables both the main fuel tank 1 and the auxiliary fuel tank 4 to supply fuel to the engine 101. The system has a simple structure, low installation cost, convenient installation, and low failure rate, improving the user experience and ensuring the reliability of fuel supply from both the main fuel tank 1 and the auxiliary fuel tank 4. Simultaneously, a one-way valve assembly 7 is installed in the replenishment pipe 6, allowing one-way flow between the replenishment pipe 6 and the main fuel tank 1 and the auxiliary fuel tank 4, thereby preventing fuel backflow, improving reliability, enhancing performance, and broadening the applicability. In some embodiments, the oil replenishment line 6 includes a main oil replenishment line 61 and a branch line 62. The branch line 62 is connected to the main oil tank 1 and the auxiliary oil tank 4 respectively. One end of the main oil replenishment line 61 is connected to the branch line 62, and the other end is provided with an oil replenishment port 612. The one-way valve assembly 7 is provided on the main oil replenishment line 61.

[0033] Specifically, the replenishment line 6 is used to replenish oil to the main fuel tank 1 and the auxiliary fuel tank 4, and as follows: Figures 1-2As shown, the oil replenishment pipeline 6 is equipped with a main oil replenishment pipeline 61 and a branch pipeline 62. One end of the branch pipeline 62 is connected to the main oil tank 1, and the other end is connected to the auxiliary oil tank 4. That is, the branch pipeline 62 connects the main oil tank 1 and the auxiliary oil tank 4. One end of the main oil replenishment pipeline 61 is connected to the branch pipeline 62, and the other end is equipped with an oil replenishment port 612. Users can deliver oil into the main oil replenishment pipeline 61 through the oil replenishment port 612. When the oil in the main oil replenishment pipeline 61 flows to the branch pipeline 62, it can replenish oil to the main oil tank 1 and the auxiliary oil tank 4 respectively through the branch pipeline 62, thereby improving the oil replenishment efficiency. It also allows the oil in the auxiliary oil tank 4 to flow to the main oil tank 1 through the branch pipeline 62 under the action of gravity, so as to achieve oil supply to the main oil tank 1. The structure is simple and can ensure the reliability of oil supply.

[0034] In addition, the one-way valve assembly 7 is installed in the main oil supply line 61, meaning that the oil can only flow through the main oil supply line 61 to the branch line 62, but the oil in the branch line 62 cannot be sprayed back to the oil supply port 612 of the main oil supply line 61, thus avoiding oil backflow. Moreover, only one one-way valve assembly 7 needs to be installed in the main oil supply line 61, which can reduce installation costs and simplify the structure.

[0035] The two ends of the diversion pipe 62 are respectively connected between the bottom of the main oil tank 1 and the bottom of the auxiliary oil tank 4, so that as much oil as possible in the auxiliary oil tank 4 can flow to the main oil tank 1 through the diversion pipe 62 under the action of gravity, ensuring the reliability of the oil supply from the auxiliary oil tank 4 to the main oil tank 1.

[0036] In some embodiments, the one-way valve assembly 7 includes a connector 71 and a valve body 72. The valve body 72 is mounted on the connector 71. The main oil supply pipeline 61 includes a first sub-segment 611 and a second sub-segment 614. An oil supply port 612 is formed in the first sub-segment 611. The first sub-segment 611 and the second sub-segment 614 are detachably connected to both ends of the connector 71, respectively. The valve body 72 conducts unidirectionally along the distribution direction of the first sub-segment 611 and the second sub-segment 614.

[0037] Specifically, the one-way valve assembly 7 is installed inside the main oil replenishment line 61, and as... Figures 3-4As shown, the one-way valve assembly 7 is provided with a connector 71 and a valve body 72. The valve body 72 is installed on the connector 71, that is, the valve body 72 can be connected to the connector 71 by bolts, snap-fit, plug-in or other means. The connector 71 is a tubular structure. The valve body 72 can be installed at one end of the connector 71 or inside the connector 71. The main oil supply line 61 is provided with a first sub-section 611 and a second sub-section 614. The first sub-section 611 and the second sub-section 614 are detachably connected to the two ends of the connector 71, so that the connector 71 is detachable relative to the main oil supply line 61, and thus the one-way valve assembly 7 is detachable relative to the main oil supply line 61. That is, when the valve body 72 is damaged, the one-way valve assembly 7 can be replaced, reducing maintenance costs and improving maintenance convenience.

[0038] When the valve body 72 is connected to one end of the connector 71, and the first sub-segment 611 and the second sub-segment 614 are respectively connected to both ends of the connector 71, the valve body 72 can extend into the first sub-segment 611 or the second sub-segment 614, and the valve body 72 can also be disposed within the connector 71, with the first sub-segment 611 and the second sub-segment 614 respectively connected to both ends of the connector 71. In this embodiment, the first sub-segment 611 and the second sub-segment 614 are respectively connected to both ends of the connector 71, and the valve body 72 extends into the second sub-segment 614.

[0039] Furthermore, the oil replenishment port 612 is located at the end of the first sub-section 611 away from the one-way valve assembly 7, and the valve body 72 is unidirectionally connected along the distribution direction of the first sub-section 611 and the second sub-section 614. That is, the user can replenish oil into the first sub-section 611 through the oil replenishment port 612, and the oil can be unidirectionally connected to the second sub-section 614 through the valve body 72. The second sub-section 614 is connected to the diversion pipeline 62, and can then flow through the second sub-section 614 to the diversion pipeline 62, so as to be delivered to the main oil tank 1 and the auxiliary oil tank 4 respectively through the diversion pipeline 62. The structure is simple, the installation is convenient, and the backflow of oil can be avoided, thus improving the user experience.

[0040] In some embodiments, a first threaded portion is formed on the outer peripheral wall of one end of the connector 71, and a first threaded mating portion is provided on the inner peripheral wall of the first segment 611, and the first threaded portion is threadedly connected to the first threaded mating portion.

[0041] Specifically, the first segment 611 is detachably connected to one end of the connector 71, and the outer peripheral wall of one end of the connector 71 is provided with a first threaded portion, and the inner peripheral wall of the first segment 611 is provided with a first threaded mating portion. That is, the first segment 611 can be sleeved on one end of the connector 71, and the inner peripheral wall of the first segment 611 can be threadedly connected to the first threaded portion of the outer peripheral wall of one end of the connector 71 through the first threaded mating portion. The structure is simple and easy to install, and the first segment 611 is detachably connected to one end of the connector 71, which facilitates the replacement of the first segment 611 or the one-way valve assembly 7, facilitates later maintenance, and saves maintenance costs and time.

[0042] In addition, the connector 71 and the first segment 611 are connected by threads, which makes the connector 71 universal and applicable to different pipelines, thus improving the flexibility of use.

[0043] In other embodiments, the outer peripheral wall of the other end of the connector 71 is formed with a second threaded portion, and the inner peripheral wall of the second segment 614 is provided with a second threaded mating portion, and the second threaded portion is threadedly connected to the second threaded mating portion.

[0044] Specifically, the second segment 614 is detachably connected to the other end of the connector 71, and the outer peripheral wall of the other end of the connector 71 is provided with a second threaded portion. The inner peripheral wall of the second segment 614 is provided with a second threaded mating portion. That is, the second segment 614 can be sleeved on the other end of the connector 71, and the inner peripheral wall of the second segment 614 can be threadedly connected to the second threaded portion of the outer peripheral wall of the other end of the connector 71 through the second threaded mating portion. The structure is simple and easy to install. It also makes the second segment 614 detachably connected to the other end of the connector 71, which facilitates the replacement of the second segment 614 or the one-way valve assembly 7, facilitates later maintenance, and saves maintenance costs and time.

[0045] In addition, the connector 71 and the second segment 614 are connected by threads, which makes the connector 71 versatile and applicable to different pipelines, thus improving the flexibility of use.

[0046] In some embodiments, a tightening protrusion 711 is formed on the outer peripheral wall of the connector 71. The tightening protrusion 711 is formed between the first threaded portion and the second threaded portion and protrudes outward toward the outer peripheral wall of the connector 71.

[0047] Specifically, the first segment 611 and the second segment 614 are respectively threaded to both ends of the connector 71, and the outer peripheral wall of the connector 71 has a tightening protrusion 711, such as... Figure 3As shown, the tightening protrusion 711 can be constructed as a hexagonal structure, and the tightening protrusion 711 is provided to protrude outward from the outer peripheral wall of the connector 71. The tightening protrusion 711 is formed between the first threaded portion and the second threaded portion. That is, when the first segment 611 and the second segment 614 are respectively connected to the two ends of the connector 71, the tightening protrusion 711 is located between the first segment 611 and the second segment 614 and protrudes outward, which makes it convenient for the user to tighten the connector 71 with tools, thereby ensuring the reliability of the connection between the first segment 611 and the second segment 614 and the connector 71.

[0048] In some embodiments, the connector 71 is provided with a snap-fit ​​portion 712, and the valve body 72 is provided with a snap-fit ​​mating portion 721, and the snap-fit ​​portion 712 and the snap-fit ​​mating portion 721 are snap-fitted together.

[0049] Specifically, valve body 72 is mounted on connector 71, and as follows: Figures 3-4 As shown, the valve body 72 is connected to one end of the connector 71 near the second segment 614. When the second segment 614 is threadedly connected to the connector 71, the valve body 72 can extend into the second segment 614. The connector 71 is provided with a snap-fit ​​part 712, which can be configured as a snap-fit ​​protrusion or a snap-fit ​​buckle, etc. The valve body 72 is provided with a snap-fit ​​mating part 721, which can be configured as a snap-fit ​​groove or a snap-fit ​​hole, etc. In this embodiment, the snap-fit ​​part 712 is configured as a snap-fit ​​protrusion, and the snap-fit ​​mating part 721 is configured as a snap-fit ​​hole. The snap-fit ​​protrusion can snap into the snap-fit ​​hole, thereby enabling the snap-fit ​​part 712 to snap into the snap-fit ​​mating part 721, so that the connector 71 and the valve body 72 can be detachably connected, facilitating installation and subsequent maintenance, etc.

[0050] In some embodiments, the engine's fuel supply system 100 further includes a return air line 8, which is connected to the upper part of the main fuel tank 1, the upper part of the auxiliary fuel tank 4, and the replenishment line 6.

[0051] Specifically, such as Figures 1-2 As shown, the engine's fuel supply system 100 is also equipped with a return air line 8, which is connected to the upper part of the main fuel tank 1, the upper part of the auxiliary fuel tank 4, and the replenishment line 6. This allows external gas to replenish the main fuel tank 1 and auxiliary fuel tank 4 through the return air line 8 when the fuel in the main fuel tank 1 and auxiliary fuel tank 4 flows to the engine 101, ensuring stable gas pressure in the main fuel tank 1 and auxiliary fuel tank 4. This, in turn, ensures stable fuel supply to the engine 101. Furthermore, after the replenishment line 6 replenishes the main fuel tank 1 and auxiliary fuel tank 4, excess gas in the main fuel tank 1 and auxiliary fuel tank 4 can also flow through the return air line 8 to the replenishment line 6, and then through the replenishment port 612 of the replenishment line 6 to the outside, thus ensuring stable gas pressure in the main fuel tank 1 and auxiliary fuel tank 4 and ensuring the reliability of the main fuel tank 1 and auxiliary fuel tank 4.

[0052] Furthermore, the return gas pipeline 8 is connected to the upper part of the main oil tank 1 and the auxiliary oil tank 4. Under the action of gravity, the oil is located at the bottom of the main oil tank 1 and the auxiliary oil tank 4, while the gas is located at the upper part of the main oil tank 1 and the auxiliary oil tank 4. Connecting the return gas pipeline 8 to the upper part of the main oil tank 1 and the upper part of the auxiliary oil tank 4 can balance the gas pressure and prevent the oil from flowing through the return gas pipeline 8, thereby avoiding oil leakage and ensuring reliable use.

[0053] In other embodiments, the oil filler port 612 is provided with a vent valve 613, such as Figure 2 As shown, a vent valve 613 is also provided at the oil replenishment port 612. The vent valve 613 can be selectively opened, so that the return air line 8 can be vented or replenished through the vent valve 613 to ensure the reliability of the replenishment. When no venting or replenishment is performed, the vent valve 613 is closed to prevent external dust and other debris from flowing into the oil replenishment line 6, so as to ensure the cleanliness of the oil replenishment line 6.

[0054] In some embodiments, the return gas line 8 includes a main return gas line 81 and a sub-return gas line 82. The sub-return gas line 82 is connected between the upper part of the main oil tank 1 and the upper part of the auxiliary oil tank 4. One end of the main return gas line 81 is connected to the sub-return gas line 82, and the other end is connected between the oil replenishment port 612 and the one-way valve assembly 7.

[0055] Specifically, the return air line 8 balances the air pressure in the main fuel tank 1 and the auxiliary fuel tank 4 to ensure the reliability of the main fuel tank 1 and the auxiliary fuel tank 4 in use, and as... Figure 2 As shown, the return gas pipeline 8 is equipped with a main return gas pipeline 81 and a sub-return gas pipeline 82. One end of the sub-return gas pipeline 82 is connected to the upper part of the main oil tank 1, and the other end is connected to the upper part of the auxiliary oil tank 4. That is, the sub-return gas pipeline 82 connects the upper part of the main oil tank 1 and the upper part of the auxiliary oil tank 4. One end of the main return gas pipeline 81 is connected to the sub-return gas pipeline 82, and the other end is connected between the oil replenishment port 612 and the one-way valve assembly 7. When the user replenishes the main oil tank 1 and the auxiliary oil tank 4 through the oil replenishment pipeline 6, the external oil replenishment device can extend into the oil replenishment pipeline 6 and pass through the end of the main return gas pipeline 81 located between the oil replenishment port 612 and the one-way valve assembly 7, thereby preventing oil from flowing into the main return gas pipeline 81 and ensuring the reliability of the return gas pipeline 8.

[0056] In some embodiments, the engine's fuel supply system 100 further includes a return line 3, which is connected between the engine 101 and the main fuel tank 1.

[0057] Specifically, such as Figure 1As shown, the engine's fuel supply system 100 is also equipped with a return oil line 3. One end of the return oil line 3 is connected to the main fuel tank 1, and the other end is connected to the engine 101. That is, the return oil line 3 connects the main fuel tank 1 and the engine 101, so that excess oil from the engine 101 can flow back to the main fuel tank 1 through the return oil line 3. This can regulate the pressure of the engine's fuel supply system 100, reduce the engine 101's fuel consumption, improve the vehicle's range performance, and thus improve the user experience.

[0058] In other embodiments, the main fuel tank 1 is equipped with a first level sensor, and / or the auxiliary fuel tank 4 is equipped with a second level sensor. This means that either the first level sensor is installed only in the main fuel tank 1, or the second level sensor is installed only in the auxiliary fuel tank 4, or the first level sensor is installed in the main fuel tank 1 and the second level sensor is installed in the auxiliary fuel tank 4. In this embodiment, the main fuel tank 1 is equipped with a first level sensor, and the auxiliary fuel tank 4 is equipped with a second level sensor. The first level sensor is located at the top of the main fuel tank 1 and is used to detect the amount of fuel in the main fuel tank 1. The second level sensor is located at the top of the auxiliary fuel tank 4 and is used to detect the amount of fuel in the auxiliary fuel tank 4. This allows for real-time monitoring of the fuel levels in both the main fuel tank 1 and the auxiliary fuel tank 4, prompting the user to add fuel and ensuring the reliability of fuel supply to the engine 101, thereby ensuring the vehicle's operational stability.

[0059] This utility model also proposes a vehicle.

[0060] The vehicle according to the present invention includes an engine fuel supply system 100 comprising any of the above-mentioned components.

[0061] According to the vehicle embodiment of this utility model, an engine fuel supply system 100 is provided. The engine fuel supply system 100 establishes a siphon pipe 5 between the main fuel tank 1 and the auxiliary fuel tank 4, creating a height difference between them. This allows all the fuel in the auxiliary fuel tank 4 to flow into the main fuel tank 1 through the siphon pipe 5 under the influence of siphoning. Thus, both the main fuel tank 1 and the auxiliary fuel tank 4 can supply fuel to the engine 101. This system has a simple structure, low installation cost, convenient installation, and low failure rate, improving user experience and ensuring reliable fuel supply from both the main and auxiliary fuel tanks. Furthermore, a one-way valve assembly 7 is provided in the replenishment line 6, allowing one-way flow between the replenishment line 6 and both the main and auxiliary fuel tanks 4, thus preventing fuel backflow, improving reliability, enhancing performance, and broadening applicability. In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fuel supply system for an engine, characterized in that, include: The main oil tank (1) is connected to the engine (101) through the oil supply line (2), and the oil supply line (2) is equipped with an oil suction pump (21). Auxiliary oil tank (4) is connected to the main oil tank (1) through a siphon pipe (5). The two ends of the siphon pipe (5) extend to the bottom of the main oil tank (1) and the bottom of the auxiliary oil tank (4) respectively, and the bottom of the main oil tank (1) is located below the bottom of the auxiliary oil tank (4) in the horizontal direction. The oil replenishment line (6) is connected to the main oil tank (1) and the auxiliary oil tank (4) respectively, and is at least partially connected between the main oil tank (1) and the auxiliary oil tank (4). The oil replenishment line (6) is provided with a one-way valve assembly (7), which is used to enable the oil replenishment line (6) to flow unidirectionally to the main oil tank (1) and the auxiliary oil tank (4).

2. The fuel supply system for the engine according to claim 1, characterized in that, The oil replenishment pipeline (6) includes a main oil replenishment pipeline (61) and a branch pipeline (62). The branch pipeline (62) is connected to the main oil tank (1) and the auxiliary oil tank (4) respectively. One end of the main oil replenishment pipeline (61) is connected to the branch pipeline (62), and the other end is provided with an oil replenishment port (612). The one-way valve assembly (7) is located on the main oil replenishment pipeline (61).

3. The fuel supply system for the engine according to claim 2, characterized in that, The one-way valve assembly (7) includes a connector (71) and a valve body (72). The valve body (72) is mounted on the connector (71). The main oil supply line (61) includes a first sub-section (611) and a second sub-section (614). The oil supply port (612) is formed in the first sub-section (611). The first sub-section (611) and the second sub-section (614) are detachably connected to both ends of the connector (71). The valve body (72) is unidirectionally oriented along the distribution direction of the first sub-section (611) and the second sub-section (614).

4. The fuel supply system for the engine according to claim 3, characterized in that, The outer peripheral wall of one end of the connector (71) is formed with a first threaded portion, and the inner peripheral wall of the first sub-segment (611) is provided with a first threaded mating portion, and the first threaded portion is threadedly connected to the first threaded mating portion. And / or, the outer peripheral wall of the other end of the connector (71) is formed with a second threaded portion, and the inner peripheral wall of the second sub-segment (614) is provided with a second threaded mating portion, and the second threaded portion is threadedly connected to the second threaded mating portion.

5. The fuel supply system for the engine according to claim 4, characterized in that, The outer peripheral wall of the connector (71) has a tightening protrusion (711) formed between the first threaded portion and the second threaded portion and protruding outward toward the outer peripheral wall of the connector (71).

6. The fuel supply system for the engine according to claim 3, characterized in that, The connector (71) is provided with a snap-fit ​​part (712), and the valve body (72) is provided with a snap-fit ​​mating part (721). The snap-fit ​​part (712) and the snap-fit ​​mating part (721) are snap-fit ​​connected.

7. The fuel supply system for the engine according to claim 2, characterized in that, Also includes: The return gas pipeline (8) is connected to the upper part of the main oil tank (1), the upper part of the auxiliary oil tank (4) and the replenishment oil pipeline (6); And / or, the oil replenishment port (612) is provided with a vent valve (613).

8. The fuel supply system for the engine according to claim 7, characterized in that, The return gas pipeline (8) includes a main return gas pipeline (81) and a sub-return gas pipeline (82). The sub-return gas pipeline (82) is connected between the upper part of the main oil tank (1) and the upper part of the auxiliary oil tank (4). One end of the main return gas pipeline (81) is connected to the sub-return gas pipeline (82), and the other end is connected between the oil replenishment port (612) and the one-way valve assembly (7).

9. The fuel supply system for the engine according to claim 1, characterized in that, Also includes: Oil return line (3), which is connected between the engine and the main oil tank (1); And / or, the main oil tank (1) is equipped with a first liquid level sensor; And / or, the auxiliary oil tank (4) is equipped with a second liquid level sensor.

10. A vehicle, characterized in that, The fuel supply system (100) of the engine according to any one of claims 1-9.

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