Fuel supply system for an engine and vehicle

Abstract

The utility model discloses an oil supply system of engine and vehicle relates to engine technical field, and the oil supply system of engine includes: main oil tank and vice oil tank, and the main oil tank is communicated with engine through oil supply pipeline to supply oil to engine, and vice oil tank is communicated with main oil tank to supply oil to main oil tank, the oil filler pipe is communicated with main oil tank and vice oil tank respectively, and the oil filler pipe is equipped with the turnover structure, and the turnover structure is communicated with main oil tank when the oil filler pipe in first state and is communicated with vice oil tank when the oil filler pipe in second state, and the oil liquid in main oil tank reaches the set height and is suitable for promoting the turnover structure from first state switching to second state, the oil supply system of engine of the utility model, and the oil supply system of engine is realized to main oil tank oiling again to vice oil tank oiling through the turnover structure under the oil liquid pressure effect, can guarantee the oil demand of main oil tank, and the turnover structure is simple, and the reliability is higher compared to the control valve of general setting, can promote the oil supply system reliability of engine, and has reduced cost.

Description

Technical Field

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

[0002] With economic development, people's demands for automobiles are also increasing, and car manufacturers are developing more diverse products to meet the needs of different groups. To meet the demand for extended driving range, some models have incorporated dual fuel tank designs. In China, dual fuel tanks were first adopted in trucks, but in passenger cars, they are primarily modified by customers themselves, and no car manufacturers have yet launched dual fuel tank models.

[0003] Currently, only one commercial vehicle uses a six-way valve to switch between the main and auxiliary fuel tanks. This valve is expensive and has a failure rate as high as 3%. This failure rate would cause a lot of complaints from passenger car customers, who would find it unacceptable. There is room for improvement. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a fuel supply system for an engine. By incorporating a tilting structure in the fuel filler pipe, the tilting structure, under the action of oil pressure, refuels both the main fuel tank and the auxiliary fuel tank, ensuring the fuel demand of the main fuel tank. Furthermore, the tilting structure is simple and more reliable than a conventionally installed control valve, thus improving the reliability of the engine's fuel supply system and reducing costs.

[0005] The fuel supply system for an engine according to an embodiment of the present invention includes: a main fuel tank and an auxiliary fuel tank, wherein the main fuel tank is connected to the engine via a fuel supply pipeline to supply fuel to the engine, and the auxiliary fuel tank is connected to the main fuel tank to supply fuel to the main fuel tank; and a fuel filler pipe, which is connected to both the main fuel tank and the auxiliary fuel tank, wherein the fuel filler pipe is provided with a flipping structure, wherein the flipping structure connects the fuel filler pipe to the main fuel tank in a first state and connects the fuel filler pipe to the auxiliary fuel tank in a second state, and wherein when the fuel level in the main fuel tank reaches a set height, it is adapted to push the flipping structure to switch from the first state to the second state.

[0006] According to the embodiment of the present invention, the fuel supply system of the engine, when the flipping structure is flipped to the first state, connects the fuel filler pipe to the main fuel tank, so that the fuel filler pipe can fill the main fuel tank. When the oil in the main fuel tank rises to a set height, the oil can push the flipping structure to switch from the first state to the second state, so that the fuel filler pipe can connect to the auxiliary fuel tank, so that the auxiliary fuel tank can be filled. The switching of the flipping structure between the first state and the second state can be achieved by the oil pressure. The structure is simple, the switching process is simple, and it is easy to implement. Moreover, this application improves the reliability of the engine fuel supply system and reduces the cost without using a six-way valve.

[0007] According to some embodiments of the present invention, the fuel supply system of an engine includes a main fuel pipe, a first fuel pipe, and a second fuel pipe. The main fuel pipe is provided with an inlet. The first fuel pipe and the second fuel pipe are respectively connected to the main fuel pipe and respectively connected to the main fuel tank and the auxiliary fuel tank. The flipping structure is provided at the connection between the main fuel pipe, the first fuel pipe, and the second fuel pipe.

[0008] According to some embodiments of the present invention, the engine fuel supply system includes a flipping structure comprising a housing and a flipping baffle. The housing is formed at the connection of the main fuel pipe, the first fuel filling pipe, and the second fuel filling pipe. The flipping baffle is rotatably installed inside the housing. The flipping baffle is adapted to first rotate relative to the housing to a first state under fuel inlet pressure to fuel the main fuel tank, and when the fuel level in the main fuel tank reaches a set height, push the flipping baffle to switch from the first state to the second state to fuel the auxiliary fuel tank.

[0009] According to some embodiments of the present invention, an engine fuel supply system includes an oil storage chamber formed within the housing, which is connected to the oil inlet. The flip-over baffle includes a first baffle and a second baffle connected together. The first baffle is adapted to rotate forward under fuel inlet pressure to connect the oil storage chamber to the first fuel filler pipe, while the second baffle blocks the oil storage chamber from the second fuel filler pipe. When the oil level in the main fuel tank reaches a set height, the oil in the main fuel tank pushes the first baffle to block the oil storage chamber from the first fuel filler pipe, and the second baffle rotates in the reverse direction under fuel inlet pressure to connect the oil storage chamber to the second fuel filler pipe.

[0010] According to some embodiments of the present invention, in the fuel supply system of an engine, the first baffle and the second baffle are bent and connected. The housing has a first contact surface on the side near the first fuel filler pipe and a second contact surface on the side near the second fuel filler pipe. When the first baffle rotates in the forward direction to contact with the first contact surface, the second baffle rotates to be closed between the fuel reservoir and the second fuel filler pipe. When the second baffle rotates in the reverse direction to contact with the second contact surface, the first baffle rotates to be closed between the fuel reservoir and the first fuel filler pipe.

[0011] According to some embodiments of the present invention, the fuel supply system of an engine has a central shaft inside the housing, and a tilting baffle is sleeved outside the central shaft. The tilting baffle is adapted to rotate around the central shaft in the oil storage chamber under oil pressure.

[0012] According to some embodiments of the present invention, in the fuel supply system of an engine, a connecting bushing is provided at the connection between the first baffle and the second baffle, and the connecting bushing is sleeved outside the central shaft.

[0013] According to some embodiments of the present invention, the fuel supply system of an engine has a cylindrical housing structure, the axis of the housing is perpendicular to the oil flow direction of the main oil pipe, and the central axis is distributed along the axial direction of the housing.

[0014] According to some embodiments of the present invention, in the engine oil supply system, the main oil tank is connected to the engine via a return oil line, the auxiliary oil tank is connected to the return oil line via an inlet oil line, the return oil line is provided with a Venturi structure, one end of the inlet oil line is connected to the auxiliary oil tank and the other end is connected to the Venturi structure, the Venturi structure is adapted to draw oil from the auxiliary oil tank to the return oil line.

[0015] This utility model also proposes a vehicle.

[0016] The vehicle according to the present invention includes the fuel supply system of the engine of any of the above embodiments.

[0017] The fuel supply systems of the vehicle and the engine described above have the same advantages over existing technologies, which will not be repeated here.

[0018] 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

[0019] 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 schematic diagram of the fuel supply system of an engine according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the fuel supply system of an engine according to an embodiment of the present utility model; Figure 3 This is a partial schematic diagram of the fuel filler pipe of the fuel supply system of an engine according to an embodiment of the present utility model; Figure 4 This is a partial schematic diagram of the flipping structure of the fuel supply system of an engine according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the first state of the flipping structure of the fuel supply system of the engine according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the second state of the flipping structure of the fuel supply system of the engine according to an embodiment of the present invention.

[0020] Figure label: The engine's fuel supply system 100, Main oil tank 1, oil supply line 11, oil suction pump 111, oil return line 12, venturi structure 121, auxiliary oil tank 2, oil inlet line 21, oil filling pipe 3, tilting structure 31, housing 311, oil storage chamber 3111, first mating surface 3112, second mating surface 3113, tilting baffle 312, first baffle 3121, second baffle 3122, connecting bushing 3123, central shaft 313, main oil pipe 32, oil inlet 321, first oil filling pipe 33, second oil filling pipe 34, engine 200. Detailed Implementation

[0021] 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.

[0022] 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. 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 a connection within 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] Unless otherwise specified, the front-back direction in this application refers to the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction refers to the lateral direction of the vehicle, i.e., the Y direction; and the up-down direction refers to the vertical direction of the vehicle, i.e., the Z direction.

[0024] The following is for reference. Figures 1-6 The description of the fuel supply system 100 of the engine according to the embodiment of the present utility model is as follows: by setting a flip structure 31 on the fuel filling pipe 3, the flip structure 31 realizes the filling of the main fuel tank 1 and the filling of the auxiliary fuel tank 2 under the action of oil pressure, which can ensure the fuel demand of the main fuel tank 1. Moreover, the flip structure 31 is simple and has higher reliability than the control valve of the general setting, thereby improving the reliability of the fuel supply system 100 of the engine and reducing the cost.

[0025] like Figures 1-6 As shown, the fuel supply system 100 of the engine according to an embodiment of the present invention includes: a main fuel tank 1, an auxiliary fuel tank 2, and a fuel filler pipe 3.

[0026] The main fuel tank 1 is connected to the engine 200 via the fuel supply line 11 to supply fuel to the engine 200, and the auxiliary fuel tank 2 is connected to the main fuel tank 1 to supply fuel to the main fuel tank 1; the fuel filler pipe 3 is connected to the main fuel tank 1 and the auxiliary fuel tank 2 respectively, and the fuel filler pipe 3 is provided with a flipping structure 31. In the first state, the flipping structure 31 connects the fuel filler pipe 3 to the main fuel tank 1 and in the second state, the fuel filler pipe 3 connects to the auxiliary fuel tank 2.

[0027] Specifically, the main fuel tank 1 supplies fuel to the engine 200. A fuel supply line 11 can be installed between the main fuel tank 1 and the engine 200, connecting one end of the line to the main fuel tank 1 and the other end to the engine 200. This allows the main fuel tank 1 to be connected to the engine 200, and fuel can be supplied to the engine 200 via the fuel supply line 11. The auxiliary fuel tank 2 supplies fuel to the main fuel tank 1. A connecting line can be installed between the auxiliary fuel tank 2 and the main fuel tank 1, allowing fuel from the auxiliary fuel tank 2 to be transferred to the main fuel tank 1 to meet its fuel requirements. This ensures a continuous fuel supply from the main fuel tank 1 to the engine 200, thereby increasing the vehicle's range and improving its performance.

[0028] The outlet end of the refueling pipe 3 can be connected to both the main fuel tank 1 and the auxiliary fuel tank 2, allowing fuel to flow from the outlet end of the refueling pipe 3 to the main fuel tank 1 for refueling, and also allowing fuel to flow from the outlet end of the refueling pipe 3 to the auxiliary fuel tank 2 for refueling. The refueling pipe 3 is equipped with a flipping structure 31, which has a flipping function and can be in two states. In the first state, the refueling pipe 3 is connected to the main fuel tank 1; in the second state, it is connected to the auxiliary fuel tank 2. Thus, by switching the state of the flipping structure 31, refueling can be achieved for both the main fuel tank 1 and the auxiliary fuel tank 2.

[0029] In actual use, when the flipping structure 31 flips to the first state, the oil from the refueling pipe 3 can be delivered to the main oil tank 1 to refuel the main oil tank 1. When the flipping structure 31 flips to the second state, the oil from the refueling pipe 3 can be delivered to the auxiliary oil tank 2 to refuel the auxiliary oil tank 2.

[0030] Simultaneously, when the oil level in the main tank 1 reaches a set height, it is suitable to push the flipping structure 31 to switch from the first state to the second state. That is, when the refueling pipe 3 is flipped to the first state by the flipping structure 31, the refueling pipe 3 refuels the main tank 1, and the oil level in the main tank 1 gradually rises. When the oil level in the main tank 1 rises to the set height, the oil can push the flipping structure 31 to switch from the first state to the second state, which can connect the refueling pipe 3 to the auxiliary tank 2, so as to refuel the auxiliary tank 2. At this time, the flipping structure 31 switches the connection state between the refueling pipe 3 and the main tank 1 to the closed state under the push of the oil, so that the main tank 1 can be refueled first and then the auxiliary tank 2 can be refueled, which can ensure the oil demand of the main tank 1.

[0031] Thus, the switching structure 31 can be switched between the first and second states by the oil pressure, so as to switch the connection between the refueling pipe 3 and the main oil tank 1 to the connection between the refueling pipe 3 and the auxiliary oil tank 2. The switching process is simple and easy to implement.

[0032] According to the embodiment of the present invention, the fuel supply system 100 of the engine, when the flipping structure 31 is flipped to the first state, the fuel filler pipe 3 is connected to the main fuel tank 1, so that the fuel filler pipe 3 can fill the main fuel tank 1. When the oil in the main fuel tank 1 rises to a set height, the oil can push the flipping structure 31 to switch from the first state to the second state, so that the fuel filler pipe 3 can be connected to the auxiliary fuel tank 2, so that the auxiliary fuel tank 2 can be filled. The switching between the first state and the second state can be realized by the oil pressure. The structure is simple, the switching process is simple, and it is easy to implement. The related technology uses a six-way valve, which has a high failure rate. The present application uses the flipping structure 31, which can improve the reliability of the engine fuel supply system 100 and reduce the cost.

[0033] In some embodiments, the refueling pipe 3 includes a main oil pipe 32, a first refueling pipe 33, and a second refueling pipe 34. The main oil pipe 32 is provided with an oil inlet 321. The first refueling pipe 33 and the second refueling pipe 34 are respectively connected to the main oil pipe 32, and the first refueling pipe 33 and the second refueling pipe 34 are respectively connected to the main oil tank 1 and the auxiliary oil tank 2.

[0034] Specifically, the main oil pipe 32 is used to add external oil to the filler pipe 3, such as... Figure 1As shown, the main oil pipe 32 is provided with an oil inlet 321, which can be connected to an external pipeline to deliver external oil from the oil inlet 321 into the main oil pipe 32. The first refueling pipe 33 and the second refueling pipe 34 are respectively connected to the main oil pipe 32, that is, the oil in the main oil pipe 32 can flow into the first refueling pipe 33 and into the second refueling pipe 34. At the same time, the first refueling pipe 33 is connected to the main oil tank 1, so that the oil in the first refueling pipe 33 can flow into the main oil tank 1 to refuel the main oil tank 1. The second refueling pipe 34 is connected to the auxiliary oil tank 2, so that the oil in the second refueling pipe 34 can flow into the auxiliary oil tank 2 to refuel the auxiliary oil tank 2.

[0035] And such as Figure 1 and Figure 3 As shown, the flip structure 31 is located at the connection between the main oil pipe 32, the first refueling pipe 33, and the second refueling pipe 34. That is, the connection between the main oil pipe 32 and the first refueling pipe 33 and the main oil pipe 32 and the second refueling pipe 34 can be switched through the flip structure 31. Moreover, by setting the flip structure 31 at the connection between the main oil pipe 32 and the first refueling pipe 33 and the second refueling pipe 34, it is convenient to switch the connection between the main oil pipe 32 and the first refueling pipe 33 or the second refueling pipe 34, so as to realize that the refueling pipe 3 first refuels the main oil tank 1 and then refuels the auxiliary oil tank 2.

[0036] In some embodiments, the flip structure 31 includes a housing 311 and a flip baffle 312. The housing 311 is formed at the connection of the main oil pipe 32, the first refueling pipe 33 and the second refueling pipe 34. The flip baffle 312 is rotatably installed inside the housing 311. The flip baffle 312 is adapted to first rotate relative to the housing 311 to a first state under oil inlet pressure to refuel the main oil tank 1, and when the oil in the main oil tank 1 reaches a set height, push the flip baffle 312 to switch from the first state to a second state to refuel the auxiliary oil tank 2.

[0037] Specifically, the housing 311 is located at the connection of the main oil pipe 32, the first refueling pipe 33, and the second refueling pipe 34. The housing 311 can be connected to the main oil pipe 32, the first refueling pipe 33, and the second refueling pipe 34 by welding. This allows the flip structure 31 to be connected to the connection of the main oil pipe 32, the first refueling pipe 33, and the second refueling pipe 34. The welding method provides higher structural strength and improves the reliability of the connection between the flip structure 31 and the main oil pipe 32, the first refueling pipe 33, and the second refueling pipe 34, thereby ensuring the reliability of refueling the main oil tank 1 and the auxiliary oil tank 2 by the refueling pipe 3.

[0038] And such as Figure 4As shown, the tilting baffle 312 is located inside the housing 311 and rotates relative to the housing 311. In actual use, the tilting baffle 312 can rotate relative to the housing 311 under the action of oil inlet pressure. When the tilting baffle 312 rotates to the first state, the main oil pipe 32 is connected to the first refueling pipe 33, allowing oil to enter the main oil tank 1 to refuel the main oil tank 1. When the oil in the main oil tank 1 reaches the set height, the oil pressure can push the tilting baffle 312 to rotate. When the tilting baffle 312 rotates to the second state, the main oil pipe 32 is disconnected from the first refueling pipe 33 and connected to the second refueling pipe 34, allowing oil to enter the auxiliary oil tank 2 to refuel the auxiliary oil tank 2.

[0039] The oil level in the main oil tank 1 is set to be such that the oil tank 1 is full and the oil is located between the second refueling pipe 34 and the flipping structure 31. The oil in the main oil tank 1 can push the flipping baffle 312 to rotate, so as to switch the flipping baffle 312 from the first state to the second state.

[0040] Thus, the pressure of the oil can drive the tilting baffle 312 to rotate inside the housing 311, enabling the tilting structure 31 to switch between the first and second states, so that the auxiliary oil tank 2 can be refueled after the main oil tank 1 is full.

[0041] In some embodiments, an oil storage chamber 3111 is formed inside the housing 311. The oil storage chamber 3111 is connected to the oil inlet 321. The flip baffle 312 includes a first baffle 3121 and a second baffle 3122 connected together. The first baffle 3121 is adapted to rotate forward under the oil inlet pressure to connect the oil storage chamber 3111 to the first refueling pipe 33, and the second baffle 3122 blocks the oil storage chamber 3111 and the second refueling pipe 34. When the oil in the main oil tank 1 reaches a set height, the oil in the main oil tank 1 pushes the first baffle 3121 to block the oil storage chamber 3111 and the first refueling pipe 33, and the second baffle 3122 rotates in the opposite direction under the oil inlet pressure to connect the oil storage chamber 3111 and the second refueling pipe 34.

[0042] Specifically, an oil storage chamber 3111 is formed inside the shell 311. The oil storage chamber 3111 is a hollow cavity used to contain oil. The inlet end of the oil storage chamber 3111 can be connected to the oil inlet 321, so that the main oil pipe 32 can be connected to the shell 311, and the oil in the main oil pipe 32 can enter the oil storage chamber 3111 of the shell 311. The flipping baffle 312 includes a first baffle 3121 and a second baffle 3122 connected together, so that the first baffle 3121 and the second baffle 3122 can rotate together relative to the shell 311. That is, through the joint rotation of the first baffle 3121 and the second baffle 3122, the flipping structure 31 can selectively connect the main oil tank 1 with the first refueling pipe 33 and the second refueling pipe 34.

[0043] Furthermore, when the oil from the main oil pipe 32 enters the oil storage chamber 3111, the pressure generated by the oil can push the first baffle 3121 to rotate in the forward direction. The first baffle 3121 opens the channel from the oil storage chamber 3111 to the first refueling pipe 33, allowing the oil storage chamber 3111 to communicate with the first refueling pipe 33. The second baffle 3122 rotates in the forward direction with the first baffle 3121, and the second baffle 3122 blocks the connection between the oil storage chamber 3111 and the second refueling pipe 34, preventing the oil storage chamber 3111 from communicating with the second refueling pipe 34. Thus, when the oil pressure pushes the first baffle 3121 and the second baffle 3122 to rotate in the forward direction, the flipping structure 31 can rotate in the forward direction. In this way, the main oil tank 1 can be refueled without refueling the auxiliary oil tank 2.

[0044] When the oil level in the main oil tank 1 reaches the set height, the oil pressure in the main oil tank 1 can push the first baffle 3121 to rotate in the opposite direction, so that the first baffle 3121 blocks the oil storage chamber 3111 and the first refueling pipe 33. At this time, the oil does not enter the main oil tank 1, and the oil flows to the second baffle 3122. The pressure generated by the oil can push the second baffle 3122 to rotate in the opposite direction. The second baffle 3122 opens the channel from the oil storage chamber 3111 to the second refueling pipe 34, so that the oil storage chamber 3111 and the second refueling pipe 34 are connected. In this way, after the main oil tank 1 is full of oil, the oil pressure pushes the first baffle 3121 and the second baffle 3122 to rotate in the opposite direction, so that the flipping structure 31 can rotate in the opposite direction. In this way, the auxiliary oil tank 2 can be refueled separately.

[0045] In this way, the entire switching process is simple, and it can first refuel the main fuel tank 1 separately, and then refuel the auxiliary fuel tank 2, so as to ensure that the main fuel tank 1 is filled first and that the fuel in the main fuel tank 1 is sufficient.

[0046] The forward rotation can be clockwise or counterclockwise, and the reverse rotation can be counterclockwise or clockwise; the directions of forward and reverse rotation are opposite. Furthermore, in this embodiment, when the flipping structure 31 rotates relative to the housing 311, such as... Figure 5 As shown, the first baffle 3121 rotates in the direction closer to the second refueling pipe 34, which is a positive rotation. This allows the first baffle 3121 to avoid the first refueling pipe 33 and the main oil pipe 32, so that the oil in the main oil pipe 32 flows to the first refueling pipe 33. Figure 6 As shown, the second baffle 3122 rotates in the opposite direction towards the first refueling pipe 33, which allows the second baffle 3122 to avoid the second refueling pipe 34 and the main oil pipe 32, so that the oil in the main oil pipe 32 flows to the second refueling pipe 34.

[0047] In some embodiments, the first baffle 3121 and the second baffle 3122 are bent and connected. The housing 311 has a first contact surface 3112 on the side near the first refueling pipe 33 and a second contact surface 3113 on the side near the second refueling pipe 34. When the first baffle 3121 rotates in the forward direction to contact with the first contact surface 3112, the second baffle 3122 rotates to be closed between the oil storage chamber 3111 and the second refueling pipe 34. When the second baffle 3122 rotates in the reverse direction to contact with the second contact surface 3113, the first baffle 3121 rotates to be closed between the oil storage chamber 3111 and the first refueling pipe 33.

[0048] Specifically, such as Figure 4 As shown, the first baffle 3121 and the second baffle 3122 are connected by a bend, which can form a certain angle between the first baffle 3121 and the second baffle 3122. This allows the first baffle 3121 and the second baffle 3122 to be connected to one of the main oil tank 1 and the first refueling pipe 33 and the second refueling pipe 34 while the refueling pipe 3 is disconnected from the other one of the first refueling pipe 33 and the second refueling pipe 34 during the rotation process. This makes it easy to refuel the main oil tank 1 or the auxiliary oil tank 2 separately through the main oil pipe 32.

[0049] And such as Figures 4-6 As shown, the housing 311 has a first contact surface 3112 on the side near the first refueling pipe 33, which facilitates contact with the first baffle 3121. The housing 311 also has a second contact surface 3113 on the side near the second refueling pipe 34, which facilitates contact with the second baffle 3122. In actual use, when the first baffle 3121 rotates forward and contacts the first contact surface 3112, the second baffle 3122 rotates forward to close the oil storage chamber 3111 and the second refueling pipe 34, thus achieving communication between the oil storage chamber 3111 and the first refueling pipe 33, but not between the oil storage chamber 3111 and the second refueling pipe 34. When the second baffle 3122 rotates in the opposite direction and contacts the second contact surface 3113, the first baffle 3121 rotates in the opposite direction to close the oil storage chamber 3111 and the first refueling pipe 33, thus achieving communication between the oil storage chamber 3111 and the second refueling pipe 34, but not between the oil storage chamber 3111 and the first refueling pipe 33.

[0050] When the first baffle 3121 and the second baffle 3122 switch from the first state to the second state, the first baffle 3121 and the second baffle 3122 can be rotated 90° to realize the switching of the main oil tank 1 to the auxiliary oil tank 2 refueling pipe 3.

[0051] Thus, by providing a first contact surface 3112 and a second contact surface 3113 in the housing 311, the first baffle 3121 can be fitted and pressed against the first contact surface 3112 after rotating in the forward direction, thereby limiting the first baffle 3121. Similarly, the second baffle 3122 can be fitted and pressed against the second contact surface 3113 after rotating in the reverse direction, thereby limiting the second baffle 3122.

[0052] In some embodiments, a central shaft 313 is provided inside the housing 311, and a flip baffle 312 is sleeved outside the central shaft 313. The flip baffle 312 is adapted to rotate around the central shaft 313 in the oil storage chamber 3111 under oil pressure.

[0053] Specifically, the central shaft 313 is connected inside the housing 311, and a flip baffle 312 is sleeved outside the central shaft 313. The flip baffle 312 can be connected inside the housing 311 through the central shaft 313. The central shaft 313 is a fixed shaft, and the flip baffle 312 can rotate around the central shaft 313 inside the housing 311. The rotational stability of the flip baffle 312 can be satisfied through the central shaft 313, which can improve the stability and service life of the flip baffle 312 when switching between the first state and the second state.

[0054] In actual use, the oil pressure can drive the tilting baffle 312 to rotate around the central axis 313 in the oil storage chamber 3111. During the rotation of the tilting baffle 312 in the oil storage chamber 3111, the oil storage chamber 3111 is connected to the first refueling pipe 33 and disconnected from the second refueling pipe 34. Alternatively, the oil storage chamber 3111 can be disconnected from the first refueling pipe 33 and connected to the second refueling pipe 34, thereby switching the refueling from the main oil tank 1 to the auxiliary oil tank 2.

[0055] The central shaft 313 can be connected to the housing 311 by welding, which can improve the reliability and stability of the connection between the central shaft 313 and the housing 311. In specific operation, one side of the central shaft 313 can be welded to the housing 311, the flipping structure 31 can be installed, and then the other side can be welded.

[0056] In some embodiments, a connecting bushing 3123 is provided at the connection between the first baffle 3121 and the second baffle 3122, and the connecting bushing 3123 is sleeved outside the central shaft 313.

[0057] Specifically, a connecting sleeve 3123 is provided at the connection between the first baffle 3121 and the second baffle 3122. A connecting hole is formed inside the connecting sleeve 3123, allowing it to be fitted onto the central shaft 313. That is, the first baffle 3121 and the second baffle 3122 can be jointly installed on the central shaft 313 through the connecting sleeve 3123. Furthermore, the connecting sleeve 3123 connects the flipping structure 31 to the central shaft 313, thus allowing the pressure of the oil to apply a force to either the first baffle 3121 or the second baffle 3122. This allows the first baffle 3121 and the second baffle 3122 to rotate relative to the central axis 313 via the connecting bushing 3123, so that the first baffle 3121 and the second baffle 3122 can rotate simultaneously relative to the central axis 313 via the connecting bushing 3123. During the rotation, the first baffle 3121 can switch the connection and disconnection between the oil storage chamber 3111 and the first refueling pipe 33, and the second baffle 3122 can switch the disconnection and connection between the oil storage chamber 3111 and the second refueling pipe 34.

[0058] In some embodiments, the housing 311 is constructed in a cylindrical shape, the axis of the housing 311 is distributed perpendicular to the oil flow direction of the main oil pipe 32, and the central axis 313 is distributed along the axial direction of the housing 311.

[0059] Specifically, the oil storage cavity 3111 can match the shape of the shell 311. The shell 311 is cylindrical, and the oil storage cavity 3111 is circular, resulting in a larger volume and increased oil storage capacity. The axis of the shell 311 is perpendicular to the oil flow direction of the main oil pipe 32, meaning the axis extends perpendicular to the oil flow direction of the main oil pipe 32. Furthermore, the central axis 313 is distributed along the axial direction of the shell 311, meaning it extends in the same direction as the axis of the shell 311, and can be positioned on the axis of the shell 311. This allows the flipping structure 31 to be located at the center of the housing 311, facilitating the uniform distribution of the first baffle 3121 and the second baffle 3122 within the oil storage chamber 3111. In actual use, when the flipping structure 31 rotates relative to the central axis 313, the oil in the main oil pipe 32 can flow in the direction intersecting with the first baffle 3121 or the second baffle 3122. This allows the oil to exert a certain force on the first baffle 3121 or the second baffle 3122 during the flow process, thereby driving the first baffle 3121 or the second baffle 3122 to rotate through the oil pressure.

[0060] In some embodiments, the main oil tank 1 is connected to the engine 200 via the return oil line 12, and the auxiliary oil tank 2 is connected to the return oil line 12 via the inlet oil line 21. The return oil line 12 is provided with a venturi structure 121. One end of the inlet oil line 21 is connected to the auxiliary oil tank 2 and the other end is connected to the venturi structure 121. The venturi structure 121 is adapted to draw the oil in the auxiliary oil tank 2 to the return oil line 12.

[0061] Specifically, such as Figure 2 As shown, a return oil line 12 is provided between the main oil pipe 32 and the engine 200. One end of the return oil line 12 is connected to the main oil tank 1, and the other end is connected to the engine 200, thus enabling the main oil tank 1 to connect with the engine 200. The return oil line 12 allows the oil in the engine 200 to flow back to the main oil tank 1. Furthermore, an inlet oil line 21 is provided between the auxiliary oil tank 2 and the return oil line 12. One end of the inlet oil line 21 is connected to the auxiliary oil tank 2, and the other end is connected to the return oil line 12, allowing the oil in the auxiliary oil tank 2 to flow into the return oil line 12 through the inlet oil line 21, and then into the main oil tank 1 from the return oil line 12, thus enabling the auxiliary oil tank 2 to replenish the main oil tank 1.

[0062] The return oil line 12 is equipped with a Venturi structure 121. The Venturi structure 121 alters the fluid velocity and pressure by changing its cross-sectional area. When the fluid passes through the contraction section, the reduced cross-sectional area leads to increased velocity and decreased pressure, creating a low-pressure zone in the smaller area. This pressure difference facilitates the rapid passage of fluid through the Venturi structure 121. The Venturi structure 121 in the return oil line 12 also allows excess oil in the engine 200 to flow back to the main oil tank 1 more quickly.

[0063] The main fuel tank 1 is connected to the engine 200 via a fuel supply line 11. The fuel supply line 11 is equipped with a fuel suction pump 111, which draws fuel from the main fuel tank 1 into the engine 200 for combustion. Excess fuel flows back to the main fuel tank 1 via a return line 12. The fuel flow direction in the main fuel tank 1 is: fuel in the main fuel tank 1 — fuel supply line 11 — fuel suction pump 111 — engine 200 — return line 12 — main fuel tank 1. Figure 2 The arrow points in the direction. One end of the inlet pipe 21 is connected to the auxiliary fuel tank 2, and the other end is connected to the venturi structure 121. When the oil in the engine 200 flows into the return pipe 12 and passes through the venturi structure 121, a low-pressure area is formed in the venturi structure 121. A pressure difference is created between the auxiliary fuel tank 2 and the venturi structure 121, allowing the oil in the auxiliary fuel tank 2 to flow through the inlet pipe 21 into the venturi structure 121, and then through the return pipe 12 to the main fuel tank 1, thus replenishing the main fuel tank 1 with oil from the auxiliary fuel tank 2. The fuel flow direction in the auxiliary fuel tank 2 is: auxiliary fuel tank 2 fuel — inlet pipe 21 — venturi structure 121 — return pipe 12 — main fuel tank 1. The fuel flow direction in the auxiliary fuel tank 2 is as follows: Figure 2 The direction the arrow points.

[0064] Furthermore, the varying cross-sectional area of ​​the Venturi structure 121 pipes can generate different levels of low pressure, enabling control of the oil flow rate. This ensures that the fuel in the auxiliary fuel tank 2 is drawn into the main fuel tank at a certain ratio (slightly less than the minimum fuel consumption of the engine 200), preventing the main fuel tank 1 from becoming completely full due to oil return. The external Venturi structure 121 in the oil return line allows the use of the original fuel level sensor, avoiding redevelopment and saving costs. Additionally, this application designates the main fuel tank 1 with a larger capacity and the auxiliary fuel tank 2 with a smaller capacity. The fuel flowing into the auxiliary fuel tank 2 is less than the fuel consumed by the engine 200 but greater than the fuel consumed by the main fuel tank 1. This ensures that the fuel in the auxiliary fuel tank 2 is used up before the main fuel tank 1, and that fuel is added to the main fuel tank 1 first during refueling. This prevents the engine 200 from failing due to a lack of fuel in the main fuel tank 1 and a lack of fuel in the auxiliary fuel tank 2, thus improving the reliability of the engine 200.

[0065] This utility model proposes a vehicle.

[0066] The vehicle according to the present invention includes an engine fuel supply system 100 of any of the above embodiments. The engine fuel supply system 100 is used to supply fuel to the engine 200 to meet the combustion requirements of the engine 200. The engine fuel supply system 100 includes a main fuel tank 1, an auxiliary fuel tank 2, and a fuel filler pipe 3. By setting a flip structure 31 on the fuel filler pipe 3, the flip structure 31 fills the main fuel tank 1 in a first state and fills the auxiliary fuel tank 2 in a second state. When the fuel level in the main fuel tank 1 reaches a set height, it is suitable to push the flip structure 31 to switch from the first state to the second state. The switching between the first and second states can be achieved by the fuel pressure. It can realize that the main fuel tank 1 is filled first and then the auxiliary fuel tank 2 is filled, which can ensure the fuel demand of the main fuel tank 1. The structure is simple, the switching process is simple, and it is easy to implement.

[0067] 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.

[0068] 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 fuel tank (1) and the auxiliary fuel tank (2) are connected to the engine via a fuel supply line (11) to supply fuel to the engine, and the auxiliary fuel tank (2) is connected to the main fuel tank (1) to supply fuel to the main fuel tank (1). A refueling pipe (3) is connected to the main oil tank (1) and the auxiliary oil tank (2) respectively. The refueling pipe (3) is provided with a flipping structure (31). In the first state, the flipping structure (31) connects the refueling pipe (3) to the main oil tank (1) and in the second state, it connects the refueling pipe (3) to the auxiliary oil tank (2). When the oil in the main oil tank (1) reaches a set height, it is suitable to push the flipping structure (31) to switch from the first state to the second state.

2. The fuel supply system for the engine according to claim 1, characterized in that, The refueling pipe (3) includes a main oil pipe (32), a first refueling pipe (33) and a second refueling pipe (34). The main oil pipe (32) is provided with an oil inlet (321). The first refueling pipe (33) and the second refueling pipe (34) are respectively connected to the main oil pipe (32), and the first refueling pipe (33) and the second refueling pipe (34) are respectively connected to the main oil tank (1) and the auxiliary oil tank (2). The flipping structure (31) is provided at the connection of the main oil pipe (32), the first refueling pipe (33) and the second refueling pipe (34).

3. The fuel supply system for the engine according to claim 2, characterized in that, The flip structure (31) includes a housing (311) and a flip baffle (312). The housing (311) is formed at the connection of the main oil pipe (32), the first refueling pipe (33) and the second refueling pipe (34). The flip baffle (312) is rotatably installed inside the housing (311). The flip baffle (312) is adapted to first rotate relative to the housing (311) to the first state under the oil inlet pressure to refuel the main oil tank (1), and push the flip baffle (312) to switch from the first state to the second state to refuel the auxiliary oil tank (2) when the oil in the main oil tank (1) reaches a set height.

4. The fuel supply system for the engine according to claim 3, characterized in that, An oil storage chamber (3111) is formed inside the housing (3111), and the oil storage chamber (3111) is connected to the oil inlet (321). The flip baffle (312) includes a first baffle (3121) and a second baffle (3122) connected together. The first baffle (3121) is adapted to rotate forward under the oil inlet pressure to connect the oil storage chamber (3111) with the first refueling pipe (33) and the second baffle (3122) is blocked between the oil storage chamber (3111) and the second refueling pipe (34). When the oil in the main oil tank (1) reaches a set height, the oil in the main oil tank (1) pushes the first baffle (3121) to block between the oil storage chamber (3111) and the first refueling pipe (33) and the second baffle (3122) rotates in the opposite direction under the oil inlet pressure to connect the oil storage chamber (3111) with the second refueling pipe (34).

5. The fuel supply system for the engine according to claim 4, characterized in that, The first baffle (3121) and the second baffle (3122) are bent and connected. The housing (311) has a first contact surface (3112) on the side near the first refueling pipe (33) and a second contact surface (3113) on the side near the second refueling pipe (34). When the first baffle (3121) rotates in the forward direction to contact with the first contact surface (3112), the second baffle (3122) rotates to be closed between the oil storage chamber (3111) and the second refueling pipe (34). When the second baffle (3122) rotates in the reverse direction to contact with the second contact surface (3113), the first baffle (3121) rotates to be closed between the oil storage chamber (3111) and the first refueling pipe (33).

6. The fuel supply system for the engine according to claim 4, characterized in that, The housing (311) is provided with a central shaft (313), and the flip baffle (312) is sleeved on the outside of the central shaft (313). The flip baffle (312) is adapted to rotate around the central shaft (313) in the oil storage chamber (3111) under oil pressure.

7. The fuel supply system for the engine according to claim 6, characterized in that, A connecting bushing (3123) is provided at the connection between the first baffle (3121) and the second baffle (3122), and the connecting bushing (3123) is sleeved outside the central shaft (313).

8. The fuel supply system for the engine according to claim 7, characterized in that, The housing (311) is cylindrical in shape, and the axis of the housing (311) is perpendicular to the oil flow direction of the main oil pipe (32). The central axis (313) is distributed along the axial direction of the housing (311).

9. The fuel supply system for the engine according to claim 1, characterized in that, The main oil tank (1) is connected to the engine through the return oil line (12), and the auxiliary oil tank (2) is connected to the return oil line (12) through the inlet oil line (21). The return oil line (12) is provided with a venturi structure (121). One end of the inlet oil line (21) is connected to the auxiliary oil tank (2) and the other end is connected to the venturi structure (121). The venturi structure (121) is adapted to draw the oil in the auxiliary oil tank (2) to the return oil line (12).

10. A vehicle, characterized in that, The fuel supply system of the engine as described in any one of claims 1-9.

Images