Double-oil-tank oil supply system and engine vehicle

Abstract

The embodiment of the invention provides a double-oil-tank oil supply system and an engine vehicle. The method comprises the steps that an oil inlet of an engine is connected to an oil outlet of a main oil tank and used for sucking oil into the engine from the main oil tank; an oil return opening of the engine, an oil outlet of the auxiliary oil tank and an oil inlet of the main oil tank are all connected to the oil suction device, and the oil suction device sucks oil in the auxiliary oil tank into the main oil tank under the driving effect of return oil of the engine. The method solves the problems that a driver cannot conveniently operate the reversing valve manually, and the driving safety of the driver is poor.

Description

Technical Field

[0001] The present application relates to the technical field of dual fuel tanks, and in particular to a dual fuel tank fuel supply system and an engine vehicle. Background Art

[0002] With the continuous development of the automobile industry, consumers have higher and higher requirements for automobile performance. Especially in long-distance driving or off-road driving, the fuel reserve of a single fuel tank is often unable to meet the needs of long-distance driving. Therefore, the dual fuel tank fuel supply system came into being, which increases the fuel reserve by adding a secondary fuel tank, thereby extending the driving distance of the vehicle.

[0003] Under normal circumstances, the engine draws fuel from the main tank for combustion. When the fuel in the main tank is about to run out, the engine will switch to the auxiliary tank for fuel. In the prior art, the connection and switching between the main tank and the auxiliary tank can be achieved through a manual reversing valve.

[0004] However, the use of a manual reversing valve requires the driver to manually operate to switch the fuel tank, which is inconvenient for the driver to use, and switching during driving may affect driving safety. Summary of the invention

[0005] The embodiments of the present application provide a dual-tank fuel supply system and an engine vehicle, which are used to ensure a continuous supply of fuel without the driver having to manually switch fuel tanks, thereby ensuring the driver's driving safety.

[0006] In order to achieve the above purpose, the technical solution of this application is as follows:

[0007] In a first aspect, the present application provides a dual-tank oil supply system, comprising an engine (1), a main oil tank (2), an auxiliary oil tank (3) and an oil suction device (4);

[0008] The oil inlet (5) of the engine is connected to the oil outlet (6) of the main oil tank, and is used to draw oil from the main oil tank (2) into the engine (1);

[0009] The oil return port (7) of the engine, the oil outlet port (8) of the auxiliary oil tank, and the oil inlet port (9) of the main oil tank are all connected to the oil suction device (4). The oil suction device (4) sucks the oil from the auxiliary oil tank (3) into the main oil tank (2) under the driving action of the oil return of the engine (1).

[0010] In a possible implementation, the oil suction device (4) has a working fluid interface (10), a sucked fluid interface (11) and an output interface (12); the working fluid interface (10) is connected to the oil return port (7) of the engine, the sucked fluid interface (11) is connected to the oil outlet (8) of the auxiliary oil tank, and the output interface (12) is connected to the oil inlet (9) of the main oil tank; the oil suction device (4) is used to suck oil from the auxiliary oil tank (3) into the main oil tank (2) under the drive of the oil return of the engine (1).

[0011] In a possible implementation, a one-way valve (13) is provided on the ventilation pipe of the main oil tank (2) for inhibiting air from flowing out of the main oil tank, so as to control the pressure of the main oil tank (2).

[0012] In a possible implementation, the sucked fluid interface (11) is connected to the oil outlet (8) of the auxiliary tank via an auxiliary tank oil outlet pipe (14), the working fluid interface (10) is connected to the oil return port (7) of the engine via an engine oil return pipe (15), and the diameter of the auxiliary tank oil outlet pipe (14) is not less than that of the engine oil return pipe (15).

[0013] In a possible implementation, the output interface (12) is connected to the oil inlet (9) of the main oil tank via a main oil tank oil inlet pipe (16), and the diameter of the main oil tank oil inlet pipe (16) is greater than the diameter of the auxiliary oil tank oil outlet pipe (14).

[0014] In a possible implementation, the oil inlet (5) of the engine is connected to the oil outlet (6) of the main oil tank via an engine oil suction pipe (17).

[0015] In a possible implementation, the auxiliary tank (3) is further provided with an auxiliary tank oil float (18), and the auxiliary tank oil outlet (8) of the auxiliary tank oil outlet pipe (14) is fixed on the auxiliary tank oil float (18).

[0016] In a possible implementation, the main oil tank (2) is further provided with a main oil tank oil float (19), the main oil tank oil outlet (6) of the engine oil suction pipe (17) is fixed on the main oil tank oil float (19), and the main oil tank oil inlet (9) of the main oil tank oil inlet pipe (16) is fixed on the main oil tank oil float (19).

[0017] In a possible implementation, the oil suction device (4) is an ejection-type oil suction device.

[0018] In a second aspect, the present application provides an engine vehicle, including the dual fuel tank fuel supply system provided in the first aspect of the embodiment of the present application.

[0019] The embodiment of the present application provides a dual-tank fuel supply system and an engine vehicle, wherein the oil inlet (5) of the engine is connected to the oil outlet (6) of the main tank, and is used to suck oil from the main tank (2) into the engine (1); the oil return port (7) of the engine, the oil outlet (8) of the auxiliary tank, and the oil inlet (9) of the main tank are all connected to the oil suction device (4), and the oil suction device (4) sucks the oil from the auxiliary tank (3) into the main tank (2) under the driving action of the oil return of the engine (1). Compared with the prior art, which requires the driver to manually operate the reversing valve to switch the main tank (2) and the auxiliary tank (3) to ensure the continuous supply of fuel, the oil suction device (4) of the present application utilizes the oil return drive of the engine (1) to suck the fuel from the auxiliary tank (3) into the main tank (2), so that there is no need to manually switch the reversing valve so that the engine (1) sucks the fuel in the auxiliary tank (3), thereby ensuring the driving safety of the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] Figure 1 A schematic diagram of the structure of a dual tank fuel supply system provided in an embodiment of the present application.

[0022] Reference numerals:

[0023] 1-engine; 2-main fuel tank; 3-auxiliary fuel tank; 4-oil suction device; 5-oil inlet of engine; 6-oil outlet of main fuel tank; 7-oil return port of engine; 8-oil outlet of auxiliary fuel tank; 9-oil inlet of main fuel tank; 10-working fluid interface; 11-sucked fluid interface; 12-output interface; 13-check valve; 14-auxiliary fuel tank oil outlet pipe; 15-engine oil return pipe; 16-main fuel tank oil inlet pipe; 17-engine oil suction pipe; 18-auxiliary fuel tank oil float; 19-main fuel tank oil float.

[0024] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0026] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0027] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0028] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0029] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0030] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0031] In the prior art, when the fuel in the main tank is about to run out, the driver needs to manually operate the reversing valve to switch the engine to draw fuel from the auxiliary tank, which makes it inconvenient for the driver to use, and operating the reversing valve during driving may affect the driver's driving safety.

[0032] Based on this, the inventive concept of this application is how to provide a dual-tank fuel supply system and an engine vehicle, and how to enable the driver to transfer the fuel in the auxiliary tank to the engine without manual operation. Based on this, by setting an oil suction device, the oil suction device uses the oil return drive of the engine to transfer the fuel in the auxiliary tank to the main tank, so that the engine can absorb the fuel in the auxiliary tank without the need for manual operation by the driver, thereby avoiding the need for the driver to manually operate the reversing valve during driving, and ensuring the safety of the driver.

[0033] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0034] Figure 1 A schematic diagram of the dual fuel tank fuel supply system structure provided in the embodiment of the present application is shown in FIG. Figure 1 As shown, the dual fuel tank oil supply system provided in the embodiment of the present application comprises: an engine (1), a main fuel tank (2), an auxiliary fuel tank (3) and an oil suction device (4).

[0035] Specifically, the oil inlet (5) of the engine is connected to the oil outlet (6) of the main oil tank, and is used to suck oil from the main oil tank (2) into the engine (1); the oil return port (7) of the engine, the oil outlet (8) of the auxiliary oil tank, and the oil inlet (9) of the main oil tank are all connected to the oil suction device (4), and the oil suction device (4) sucks the oil from the auxiliary oil tank (3) into the main oil tank (2) under the driving action of the oil return of the engine (1).

[0036] In the embodiment of the present application, the oil inlet (5) of the engine is connected to the oil outlet (6) of the main oil tank, and is used to draw fuel from the main oil tank (2) through the oil inlet (5) of the engine when the engine (1) is working, so as to meet the combustion demand of the engine (1). The oil outlet (6) of the main oil tank is connected to the oil inlet (5) of the engine, so as to provide fuel for the engine (1). The oil return port (7) of the engine, the oil outlet (8) of the auxiliary oil tank, and the oil inlet (9) of the main oil tank are all connected to the oil suction device (4), so that the oil suction device (4) can suck the oil from the auxiliary oil tank (3) into the main oil tank (2) under the oil return drive of the engine (1), thereby replenishing the fuel amount of the main oil tank (2).

[0037] In the embodiment of the present application, the oil inlet (5) of the engine is connected to the oil outlet (6) of the main oil tank, so as to suck oil from the main oil tank (2) into the engine (1); the oil return port (7) of the engine, the oil outlet (8) of the auxiliary oil tank, and the oil inlet (9) of the main oil tank are all connected to the oil suction device (4), and the oil suction device (4) sucks the oil from the auxiliary oil tank (3) into the main oil tank (2) under the driving action of the oil return of the engine (1). Compared with the prior art, which requires the driver to manually operate the reversing valve to switch the main oil tank (2) and the auxiliary oil tank (3) to ensure the continuous supply of fuel, the oil suction device (4) of the present application utilizes the oil return drive of the engine (1) to suck the fuel from the auxiliary oil tank (3) into the main oil tank (2), thereby eliminating the need to manually switch the reversing valve so that the engine (1) can suck the fuel from the auxiliary oil tank (3), thereby ensuring the driving safety of the driver.

[0038] The specific implementation method of the oil suction device (4) sucking the oil from the auxiliary oil tank (3) into the main oil tank (2) under the driving action of the oil return of the engine (1) is as follows: the oil suction device (4) has a working fluid interface (10), a sucked fluid interface (11) and an output interface (12); the working fluid interface (10) is connected to the oil return port of the engine (1); the sucked fluid interface (11) is connected to the oil outlet (8) of the auxiliary oil tank; the output interface (12) is connected to the oil inlet (9) of the main oil tank; the oil suction device (4) is used to suck the oil from the auxiliary oil tank (3) into the main oil tank (2) under the driving action of the oil return of the engine (1).

[0039] In the embodiment of the present application, the oil suction device (4) has a working fluid interface (10), a sucked fluid interface (11) and an output interface (12). The working fluid interface (10) is directly connected to the oil return port (7) of the engine through a pipeline, so as to receive the return oil generated by the engine (1) during operation, and provide necessary power for the oil suction device (4); the sucked fluid interface (11) is connected to the oil outlet (8) of the auxiliary oil tank through a pipeline, and the oil suction device (4) sucks fuel from the auxiliary oil tank (3) through the sucked fluid interface (11) under the action of the return oil drive; the output interface (12) is connected to the oil inlet (9) of the main oil tank through a pipeline, so as to transport the fuel sucked from the auxiliary oil tank (3) and the return oil generated by the engine (1) during operation to the main oil tank (2). The working fluid interface (10) mentioned above is connected to the oil return port (7) of the engine, the sucked fluid interface (11) is connected to the oil outlet (8) of the auxiliary oil tank, and the output interface (12) is connected to the oil inlet (9) of the main oil tank. The connection method can be threaded connection, flange connection or welding connection.

[0040] In some embodiments, the oil suction device (4) is an ejection-type oil suction device. Optionally, the ejection-type oil suction device is a venturi jet device, a jet pump, or the like. The ejection-type oil suction device utilizes the principle of the Bernoulli equation, that is, utilizes the negative pressure generated when the working fluid changes from low speed to high speed to attract and transport the sucked fluid. The return oil of the engine (1) enters the working fluid interface (10) of the ejection-type oil suction device as the working fluid. The working fluid passes through the nozzle or throat inside the ejection-type oil suction device, and the flow rate increases and the pressure decreases. The ejection-type oil suction device generates suction force on the fuel in the auxiliary tank (3) through the generated low-pressure area. The fuel in the auxiliary tank (3) enters the ejection-type oil suction device through the sucked fluid interface (11). The fuel in the auxiliary tank (3) in the ejection-type oil suction device is transported to the main tank (2) together with the return oil generated by the engine (1) through the output interface (12).

[0041] In the embodiments of the present application, further, see Figure 1 A one-way valve (13) is provided on the ventilation pipe of the main oil tank, which is used to inhibit air from flowing out of the main oil tank (2) so as to control the pressure of the main oil tank (2).

[0042] In the embodiment of the present application, a one-way valve (13) is provided on the ventilation pipe of the main fuel tank (2) to prevent the fuel in the main fuel tank (2) from overflowing. Specifically, when the amount of fuel delivered from the auxiliary fuel tank (3) to the main fuel tank (2) by the injection-type oil suction device is greater than the fuel consumption of the engine (1), the fuel liquid level in the main fuel tank (2) will rise, thereby causing the risk of fuel overflowing. By installing a one-way valve (13) on the ventilation duct of the main fuel tank (2), air can only flow into the main fuel tank (2) from the outside, while the air in the main fuel tank (2) cannot flow out through the ventilation duct. When the fuel level in the main fuel tank (2) rises, the pressure in the main fuel tank (2) also rises, which in turn increases the resistance of the oil inlet of the injection-type oil suction device to the main fuel tank (2). As a result, the amount of oil sucked by the injection-type oil suction device from the auxiliary fuel tank (3) will be reduced. When the pressure of the main fuel tank (2) increases to a certain extent, the amount of oil sucked by the injection-type oil suction device will be reduced to be equal to the fuel consumption of the engine (1). At this time, the fuel level in the main fuel tank (2) will no longer rise, thereby ensuring that the fuel in the main fuel tank (2) will not overflow.

[0043] See also Figure 1 In the embodiment of the present application, the sucked fluid interface (11) is connected to the oil outlet (8) of the auxiliary oil tank through the auxiliary oil tank oil outlet pipe (14), and the working fluid interface (10) is connected to the oil return port (7) of the engine through the engine oil return pipe (15), and the diameter of the auxiliary oil tank oil outlet pipe (14) is not less than that of the engine oil return pipe (15).

[0044] In the embodiment of the present application, the sucked fluid interface (11) and the oil outlet (8) of the auxiliary oil tank are connected via the auxiliary oil tank oil outlet pipe (14), and the working fluid interface (10) and the oil return port of the engine (1) are connected via the engine oil return pipe (15). The diameter of the engine oil return pipe (15) is smaller than the diameter of the auxiliary oil tank oil outlet pipe (14). The engine oil return pipe (15) is used to transport excess or unused fuel inside the engine (1) to the oil suction device (4). Compared with the auxiliary oil tank oil outlet pipe (14), the amount of fuel transported by the engine oil return pipe (15) is usually smaller, so a smaller diameter is sufficient to meet the requirements of the oil return pipe. Moreover, by providing an engine oil return pipe (15) with a smaller diameter, the flow rate of the oil return from the engine (1) can be increased, thereby reducing the pressure in the ejection type oil suction device, so that the fuel can be smoothly sucked from the auxiliary oil tank (3).

[0045] Furthermore, the diameter of the auxiliary oil tank oil outlet pipe (14) may be set to be the same as the diameter of the engine oil return pipe (15) to reduce the number and types of assembly parts, thereby reducing production costs and reducing the complexity of inventory management.

[0046] Optionally, the auxiliary oil tank oil outlet pipe (14) may be a rubber pipe, an aluminum pipe or a metal pipe; and the engine oil return pipe (15) may be a rubber pipe or a plastic pipe.

[0047] In some embodiments, the output interface (12) is connected to the oil inlet (9) of the main oil tank through the main oil tank oil inlet pipe (16), and the diameter of the main oil tank oil inlet pipe (16) is larger than the diameter of the auxiliary oil tank oil outlet pipe (14). The oil inlet (5) of the engine is connected to the oil outlet (6) of the main oil tank through the engine oil suction pipe (17).

[0048] In the embodiment of the present application, the oil inlet (5) of the engine and the oil outlet (6) of the main oil tank are connected via an engine oil suction pipe (17), the output interface (12) and the oil inlet (9) of the main oil tank are connected via a main oil tank oil inlet pipe (16), and the diameter of the main oil tank oil inlet pipe (16) is larger than the diameter of the auxiliary oil tank oil outlet pipe (14). Since the fuel delivered to the main oil tank (2) comes from the fuel sucked from the auxiliary oil tank (3) by the ejection oil suction device and the return oil of the engine (1), the flow resistance of the fuel in the main oil tank oil inlet pipe (16) is reduced by setting the main oil tank oil inlet pipe (16) to a larger diameter, which helps to accommodate a larger fuel flow and prevents the main oil tank oil inlet pipe (16) from being blocked when the return oil amount of the engine (1) is too large.

[0049] Optionally, the main fuel tank inlet pipe (16) is mainly a hard pipe to ensure stable fuel delivery, such as carbon steel, stainless steel or alloy steel. The engine oil suction pipe (17) can be a hard pipe or a soft pipe, such as a rubber pipe, a metal pipe, etc.

[0050] See also Figure 1 In the embodiment of the present application, an auxiliary tank oil float (18) is also provided in the auxiliary tank (3), and the auxiliary tank oil outlet (8) of the auxiliary tank oil outlet pipe (14) is fixed on the auxiliary tank oil float (18).

[0051] In the embodiment of the present application, the auxiliary tank oil float (18) can sense the fuel level in the auxiliary tank (3) in real time, and together with the fuel gauge, constitutes a fuel level detection system for the engine vehicle, so that the driver can understand the fuel reserve status of the auxiliary tank (3) in real time. The auxiliary tank oil outlet (8) of the auxiliary tank oil outlet pipe (14) is fixed on the auxiliary tank oil float (18) to support the fuel to be transported from the auxiliary tank oil outlet (8) to the auxiliary tank oil outlet pipe (14), and the auxiliary tank oil outlet (8) is fixed on the auxiliary tank oil float (18), which can enhance the stability of the overall structure of the auxiliary tank (3) and help prevent the auxiliary tank oil outlet (8) from loosening or being damaged due to the sloshing of the fuel in the auxiliary tank (3) during the driving of the vehicle.

[0052] In some embodiments, a main oil tank oil float (19) is further provided in the main oil tank (2); an oil outlet (6) of the main oil tank of the engine oil suction pipe (17) is fixed on the main oil tank oil float (19); and an oil inlet (9) of the main oil tank of the main oil tank inlet pipe (16) is fixed on the main oil tank oil float (19).

[0053] In the embodiment of the present application, the main tank oil float (19) and the auxiliary tank oil float (18) have the same function and can sense the fuel level in the main tank (2) in real time, and together with the fuel gauge, form an engine vehicle fuel level detection system, so that the driver can understand the fuel reserve status of the main tank (2) in real time. In addition, the main tank oil outlet (6) of the engine oil suction pipe (17) and the main tank oil inlet (9) of the main tank oil inlet pipe (16) are fixed on the main tank oil float (19) to enhance the overall structural stability of the main tank, which helps to prevent the main tank oil outlet (6) and the main tank oil inlet (9) from loosening or being damaged due to the shaking of the fuel in the main tank (2) during the driving of the vehicle.

[0054] By installing an auxiliary fuel tank oil float (18) and a main fuel tank oil float (19) on the auxiliary fuel tank (3) and the main fuel tank (2), respectively, the driver can accurately understand the fuel conditions of the auxiliary fuel tank and the main fuel tank (2). When the auxiliary fuel tank oil float (18) shows that the fuel in the auxiliary fuel tank (3) is about to be exhausted, the driver can add fuel to ensure the continuous driving ability of the vehicle. When the main fuel tank oil float (19) shows that the fuel is exhausted, but the auxiliary fuel tank oil float (18) shows that there is still a lot of fuel remaining in the auxiliary fuel tank (3), the driver can be reminded that the ejection type oil suction device may be faulty or the pipeline may be cracked, and the driver needs to check and repair it.

[0055] In summary, the dual-tank fuel supply system provided by the present application, by providing an ejection-type oil suction device, utilizes the return oil generated by the engine (1) during operation, drives the ejection-type oil suction device to suck fuel from the auxiliary tank (3), and then enters the main tank (2) through the auxiliary tank oil outlet pipe (14) and the main tank oil inlet pipe (16), thereby avoiding the need for the driver to manually switch the main tank (2) to the auxiliary tank (3), thereby ensuring a continuous supply of fuel and ensuring the driving safety of the driver. In addition, by providing a one-way valve (13) on the ventilation pipe of the main tank (2), the one-way valve (13) only allows external air to enter the main tank (2) and inhibits air from flowing out of the main tank (2), thereby avoiding the risk of the fuel liquid level in the main tank (2) rising when the amount of fuel delivered from the auxiliary tank (3) to the main tank (2) by the oil suction device (4) is greater than the fuel consumption of the engine (1), thereby causing the risk of fuel overflow. Furthermore, a main fuel tank oil float (19) and an auxiliary fuel tank oil float (18) are respectively arranged on the main fuel tank (2) and the auxiliary fuel tank (3), which can provide information on the fuel levels of the main fuel tank (2) and the auxiliary fuel tank (3), so that the driver can replenish fuel in time or check whether a fault occurs in the dual fuel tank fuel supply system.

[0056] Based on the same technical concept, the embodiment of the present application also provides an engine vehicle, including the above dual fuel tank fuel supply system provided by the embodiment of the present application. The engine vehicle provided by the embodiment of the present application can be applied to all application scenarios using the above dual fuel tank fuel supply system.

[0057] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions provided by the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A dual tank oil supply system, characterized in that: include: An engine (1), a main fuel tank (2), an auxiliary fuel tank (3) and an oil suction device (4); The oil inlet (5) of the engine is connected to the oil outlet (6) of the main oil tank, and is used to draw oil from the main oil tank (2) into the engine (1); The oil return port (7) of the engine, the oil outlet port (8) of the auxiliary oil tank, and the oil inlet port (9) of the main oil tank are all connected to the oil suction device (4). The oil suction device (4) sucks the oil from the auxiliary oil tank (3) into the main oil tank (2) under the driving action of the oil return of the engine (1).

2. The system according to claim 1, characterized in that The oil suction device (4) has a working fluid interface (10), a sucked fluid interface (11) and an output interface (12); the working fluid interface (10) is connected to the oil return port (7) of the engine; the sucked fluid interface (11) is connected to the oil outlet (8) of the auxiliary oil tank; the output interface (12) is connected to the oil inlet (9) of the main oil tank; the oil suction device (4) is used to suck oil from the auxiliary oil tank (3) into the main oil tank (2) under the drive of the oil return of the engine (1).

3. The system according to claim 1, characterized in that A one-way valve (13) is provided on the ventilation pipe of the main oil tank (2) for preventing air from flowing out of the main oil tank (2) so as to control the pressure of the main oil tank (2).

4. The system according to claim 2, characterized in that The sucked fluid interface (11) is connected to the oil outlet (8) of the auxiliary oil tank via an auxiliary oil tank oil outlet pipe (14), and the working fluid interface (10) is connected to the oil return port (7) of the engine via an engine oil return pipe (15), and the diameter of the auxiliary oil tank oil outlet pipe (14) is not less than that of the engine oil return pipe (15).

5. The system according to claim 4, characterized in that The output interface (12) is connected to the oil inlet (9) of the main oil tank via a main oil tank oil inlet pipe (16), and the diameter of the main oil tank oil inlet pipe (16) is greater than the diameter of the auxiliary oil tank oil outlet pipe (14).

6. The system according to claim 5, characterized in that The oil inlet (5) of the engine is connected to the oil outlet (6) of the main oil tank via an engine oil suction pipe (17).

7. The system according to claim 4, characterized in that The auxiliary oil tank (3) is also provided with an auxiliary oil tank oil float (18), and the auxiliary oil tank oil outlet (8) of the auxiliary oil tank oil outlet pipe (14) is fixed on the auxiliary oil tank oil float (18).

8. The system according to claim 5, characterized in that The main oil tank (2) is also provided with a main oil tank oil float (19); the main oil tank oil outlet (6) of the engine oil suction pipe (17) is fixed to the main oil tank oil float (19); and the main oil tank oil inlet (9) of the main oil tank oil inlet pipe (16) is fixed to the main oil tank oil float (19).

9. The system according to any one of claims 1 to 8, characterized in that The oil suction device (4) is an ejection type oil suction device.

10. An engine vehicle, characterized in that: It comprises a dual tank oil supply system as claimed in any one of claims 1 to 9.

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