Fuel system, control method of fuel system and vehicle

Abstract

The invention discloses a fuel system, a control method of the fuel system and a vehicle. The fuel system comprises an engine, a first oil tank, a second oil tank, an oil return pipe, a first oil pump, a second oil pump, a first one-way valve and a second one-way valve, wherein oil outlets of the first oil tank and the second oil tank are connected with an oil inlet of the engine; the oil return pipe connects the engine with an oil return port of the first oil tank; the first oil pump drives oil in the first oil tank to flow to the engine; the second oil pump drives oil in the second oil tank to flow to the engine; the first one-way valve is arranged between the first oil tank and the engine and allows oil in the first oil tank to flow to the engine; the second one-way valve is arranged between the second oil tank and the engine and allows oil in the second oil tank to flow to the engine. According to the fuel system, the first fuel tank and the second fuel tank can supply fuel to the engine independently, it is guaranteed that when one fuel tank fails, the other fuel tank can still work to guarantee automobile running, the fault rate is reduced, and the situation that the fuel supply pressure is insufficient can be improved through the one-way valve.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a fuel system, a control method of the fuel system, and a vehicle. Background Art

[0002] In the related art, the diesel dual tank system is that the main tank supplies fuel to the engine, and the auxiliary tank is only used to introduce the fuel in the auxiliary tank into the main tank through the auxiliary pump (or through the Venturi effect of the main pump) when the main tank is empty, and then the main tank supplies fuel to the engine. Once the main pump fails, the car will not be able to continue driving. In addition, when the dual tanks supply fuel, the oil in one tank may flow into the other tank, resulting in insufficient fuel supply pressure. Summary of the invention

[0003] In view of this, the present invention aims to propose a fuel system, in which a first fuel tank and a second fuel tank can independently supply fuel to the engine, thereby reducing the failure rate and improving the vehicle's cruising range. In addition, the setting of a one-way valve can improve the problem of insufficient fuel supply pressure.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A fuel system comprises: an engine, a first fuel tank, a second fuel tank, a return pipe, a first fuel pump, a second fuel pump, a first non-return valve and a second non-return valve, wherein the fuel outlet of the first fuel tank and the fuel outlet of the second fuel tank are directly or indirectly connected to the fuel inlet of the engine; the return pipe connects the fuel return port of the engine and the fuel return port of the first fuel tank; the first fuel pump is used to drive the fuel in the first fuel tank to flow toward the engine; the second fuel pump is used to drive the fuel in the second fuel tank to flow toward the engine; the first non-return valve is arranged between the fuel outlet of the first fuel tank and the fuel inlet of the engine and allows the fuel in the first fuel tank to flow toward the engine; the second non-return valve is arranged between the fuel outlet of the second fuel tank and the fuel inlet of the engine and allows the fuel in the second fuel tank to flow toward the engine.

[0006] According to some embodiments of the present invention, the fuel system further includes a first oil outlet pipe, a second oil outlet pipe, and a main oil pipe, wherein the first oil outlet pipe is connected to the oil outlet of the first fuel tank; the second oil outlet pipe is connected to the oil outlet of the second fuel tank; the main oil pipe is connected to the oil inlet of the engine, and the first oil outlet pipe and the second oil outlet pipe are both connected to the main oil pipe.

[0007] Furthermore, the first one-way valve is arranged on the first oil outlet pipe and allows the oil in the first oil tank to flow into the main oil pipe; the second one-way valve is arranged on the second oil outlet pipe and allows the oil in the second oil tank to flow into the main oil pipe.

[0008] Furthermore, an oil filter is provided on the main oil pipe.

[0009] According to some embodiments of the present invention, the fuel system further includes: a first refueling pipe, a second refueling pipe, a first air return pipe, a second air return pipe, and a main sleeve, wherein the first refueling pipe is connected to the refueling port of the first fuel tank; the second refueling pipe is connected to the refueling port of the second fuel tank; the first air return pipe is connected to the first fuel tank; the second air return pipe is connected to the second fuel tank; the main sleeve has a collecting chamber, and the first refueling pipe, the second refueling pipe, the first air return pipe and the second air return pipe are all connected to the collecting chamber.

[0010] According to some embodiments of the present invention, the fuel system further includes: a first liquid level sensor and a second liquid level sensor, wherein the first liquid level sensor is used to detect the oil level in the first fuel tank; and the second liquid level sensor is used to detect the oil level in the second fuel tank.

[0011] Compared with the prior art, the fuel system of the present invention has the following advantages:

[0012] In the fuel system described in the present invention, since the oil outlet of the first fuel tank and the oil outlet of the second fuel tank are directly or indirectly connected to the oil inlet of the engine, the first fuel tank and the second fuel tank can independently supply fuel to the engine, ensuring that when one of the first fuel tank and the second fuel tank fails, the other can still work to ensure the driving of the vehicle, thereby reducing the failure rate and improving the vehicle's cruising range.

[0013] Another object of the present invention is to provide a control method for the above-mentioned fuel system.

[0014] A control method of the above fuel system includes:

[0015] Controlling the first oil pump to operate and the second oil pump to not operate;

[0016] When the oil level in the first oil tank drops to a first preset level value, the second oil pump is controlled to operate and the first oil pump is controlled to stop operating;

[0017] When the oil level in the second oil tank drops to a second preset level value, the first oil pump is controlled to operate again and the second oil pump is controlled not to operate;

[0018] When the oil level in the first oil tank drops to the first preset level value again, an oil shortage prompt message is issued.

[0019] According to some embodiments of the present invention, when the oil level in the first oil tank has not dropped to the first preset level value, if there is no oil pressure in the oil rail of the engine, the current of the first oil pump is detected. When the current of the first oil pump is greater than the first preset current value or the current of the first oil pump is zero, a fault of the first oil tank is prompted and the second oil pump is controlled to operate.

[0020] According to some embodiments of the present invention, after the second oil pump has been working for a preset time value, if the oil level in the second oil tank has not changed, the current of the second oil pump is detected, and when the current of the second oil pump is greater than a second preset current value or the current of the second oil pump is zero, a fault in the second oil tank is indicated.

[0021] Compared with the prior art, the fuel system control method of the present invention has the following advantages:

[0022] In the control method of the fuel system of the present invention, the first fuel pump and the second fuel pump can work independently, ensuring that when one of the first fuel tank and the second fuel tank fails, the other can still work to ensure the vehicle's driving, reducing the failure rate and improving the vehicle's cruising range. The first check valve and the second check valve can improve the problem of insufficient fuel supply pressure in the first fuel tank and the second fuel tank.

[0023] Another object of the present invention is to provide a vehicle.

[0024] A vehicle comprises the above-mentioned fuel system.

[0025] Compared with the prior art, the vehicle of the present invention has the following advantages:

[0026] The vehicle of the present invention can independently supply oil to the engine because the first oil tank and the second oil tank can ensure that when one of the first oil tank and the second oil tank fails, the other can still work to ensure the vehicle's running, thereby reducing the failure rate and improving the vehicle's cruising range. The first one-way valve and the second one-way valve can improve the problem of insufficient oil supply pressure in the first oil tank and the second oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 is a schematic diagram of a fuel system according to an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of a fuel system control method according to an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] Fuel system 100, engine 10, main oil pipe 11, oil filter 12, oil inlet 13, engine oil return port 14;

[0032] The first oil tank 20, the oil outlet 21 of the first oil tank, the oil return pipe 22, the oil return port 23 of the first oil tank, the first oil pump 24, the first oil outlet pipe 25, the first non-return valve 26, the first oil filling pipe 27, the first air return pipe 28, and the main casing 29;

[0033] The second oil tank 30 , the second oil pump 31 , the second oil outlet pipe 32 , the second one-way valve 33 , the second oil filling pipe 34 , the second air return pipe 35 , and the oil outlet 36 of the second oil tank. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0035] The following will refer to Figure 1-Figure 2 The present invention is described in detail with reference to embodiments.

[0036] Reference Figure 1 As shown, the fuel system 100 according to the embodiment of the present invention may include: an engine 10, a first fuel tank 20, a second fuel tank 30, a fuel return pipe 22, a first fuel pump 24, a second fuel pump 31, a first check valve 26 and a second check valve 33. The fuel outlet 21 of the first fuel tank 20 and the fuel outlet 36 of the second fuel tank 30 are both directly or indirectly connected to the fuel inlet 13 of the engine 10. Optionally, in some embodiments not shown in the figure, the fuel outlet 21 of the first fuel tank 20 is directly connected to the fuel inlet 13 of the engine 10, and the fuel outlet 36 of the second fuel tank 30 is directly connected to the fuel inlet 13 of the engine 10 without passing through other media; in other embodiments, such as Figure 1 As shown, the oil outlet 21 of the first oil tank 20 and the oil outlet 36 of the second oil tank 30 may also be indirectly connected to the oil inlet 13 of the engine 10 via an oil outlet pipe.

[0037] In the related art, if the main tank supplies fuel to the engine, the auxiliary tank is only used to introduce the fuel in the auxiliary tank into the main tank through the auxiliary pump (or through the Venturi effect of the main pump) when the main tank is out of fuel, and then the main tank supplies fuel to the engine to work. Once the main tank fails, the car will not be able to continue driving. In the fuel system 100 of the embodiment of the present invention, the oil outlet 21 of the first tank 20 and the oil outlet 36 of the second tank 30 are directly or indirectly connected to the oil inlet 13 of the engine 10, and the first tank 20 and the second tank 30 independently supply fuel to the engine 10. If one of the tanks fails, it can still ensure that the other tank can effectively supply fuel to the engine 10, which reduces the failure rate of the vehicle and is conducive to improving the cruising range of the vehicle. In actual application, the first tank 20 of the present invention can be used as a main tank, and the second tank 30 can be used as an auxiliary tank.

[0038] The oil return pipe 22 connects the oil return port 14 of the engine 10 and the oil return port 23 of the first oil tank 20. The fuel returned from the engine 10 can flow back to the first oil tank 20 through the return pipe, which helps to recover the fuel and save driving costs. In addition, a three-way valve is not required, which is conducive to reducing the number of parts and simplifying the oil return flow path.

[0039] The first oil pump 24 is used to drive the oil in the first oil tank 20 to flow to the engine 10; the second oil pump 31 is used to drive the oil in the second oil tank 30 to flow to the engine 10. The first oil tank 20 and the second oil tank 30 can independently supply oil to the engine 10 through the first oil pump 24 and the second oil pump 31, ensuring that when one of the first oil tank 20 and the second oil tank 30 fails, the other can still work to ensure the driving of the vehicle, reducing the failure rate and improving the vehicle's cruising range.

[0040] The first check valve 26 is disposed between the oil outlet 21 of the first oil tank 20 and the oil inlet 13 of the engine 10 and allows the oil in the first oil tank 20 to flow to the engine 10. The second check valve 33 is disposed between the oil outlet 36 of the second oil tank 30 and the oil inlet 13 of the engine 10 and allows the oil in the second oil tank 30 to flow to the engine 10. The second check valve 33 can prevent the fuel from entering the second oil tank 30 when the first oil tank 20 is working and causing insufficient fuel supply pressure, and the first check valve 26 can prevent the fuel from entering the first oil tank 20 when the second oil tank 30 is working and causing insufficient fuel supply pressure. In other words, the first check valve 26 and the second check valve 33 can improve the problem of insufficient fuel supply pressure in the first oil tank 20 and the second oil tank 30.

[0041] In some embodiments of the present invention, reference Figure 1As shown, the fuel system 100 may further include a first oil outlet pipe 25, a second oil outlet pipe 32, and a main oil pipe 11, wherein the first oil outlet pipe 25 is connected to the oil outlet 21 of the first fuel tank 20; the second oil outlet pipe 32 is connected to the oil outlet 36 of the second fuel tank 30; the main oil pipe 11 is connected to the oil inlet 13 of the engine 10, and the first oil outlet pipe 25 and the second oil outlet pipe 32 are both connected to the main oil pipe 11. Figure 1 As shown, the fuel in the first fuel tank 20 flows to the main fuel pipe 11 through the first fuel outlet pipe 25, and the fuel in the second fuel tank 30 flows to the main fuel pipe 11 through the second fuel outlet pipe 32. The main fuel pipe 11 supplies fuel to the engine 10, which can reduce the number of openings on the engine 10.

[0042] Further, refer to Figure 1 As shown, the first check valve 26 is arranged on the first oil outlet pipe 25 and allows the oil in the first oil tank 20 to flow to the main oil pipe 11; the second check valve 33 is arranged on the second oil outlet pipe 32 and allows the oil in the second oil tank 30 to flow to the main oil pipe 11. Since the first oil outlet pipe 25 and the second oil outlet pipe 32 are both connected to the main oil pipe 11, when no valve is installed, the fuel in the first oil outlet pipe 25 can flow to the second oil outlet pipe 32 or the fuel in the second oil outlet pipe 32 can flow to the first oil outlet pipe 25. The second check valve 33 can prevent the fuel from entering the second oil tank 30 through the second oil outlet pipe 32 when the first oil tank 20 is working, thereby causing insufficient oil supply pressure. The first check valve 26 can prevent the fuel from entering the first oil tank 20 through the first oil outlet pipe 25 when the second oil tank 30 is working, thereby causing insufficient oil supply pressure.

[0043] Further, refer to Figure 1 As shown, an oil filter 12 is provided on the main oil pipe 11. The oil filter 12 can filter the fuel in the main oil pipe 11 before transmitting it to the engine 10, thereby reducing the wear of impurities in the fuel on the parts in the engine 10, which is beneficial to reducing the failure rate of the engine 10.

[0044] In some embodiments of the present invention, reference Figure 1As shown, the fuel system 100 may also include: a first refueling pipe 27, a second refueling pipe 34, a first air return pipe 28, a second air return pipe 35, and a main sleeve 29. The first refueling pipe 27 is connected to the refueling port of the first fuel tank 20; the second refueling pipe 34 is connected to the refueling port of the second fuel tank 30; the first air return pipe 28 is connected to the first fuel tank 20; the second air return pipe 35 is connected to the second fuel tank 30; the main sleeve 29 has a collection cavity, and the first refueling pipe 27, the second refueling pipe 34, the first air return pipe 28 and the second air return pipe 35 are all connected to the collection cavity. Optionally, a general opening is provided on the collection cavity, and the fuel can enter the collection cavity from the general opening, and then enter the first refueling pipe 27 and the second refueling pipe 34 from the collection cavity respectively. The first refueling pipe 27 and the second refueling pipe 34 can be used to refuel the first fuel tank 20 and the second fuel tank 30 respectively. When refueling, the first fuel tank 20 returns air through the first air return pipe 28, and the second fuel tank 30 returns air through the second air return pipe 35.

[0045] Since the first air return pipe 28 and the second air return pipe 35 are connected through the collecting chamber of the main sleeve 29, when the first fuel tank 20 has sufficient fuel and the first fuel pump 24 fails, the second fuel tank 30 can independently supply fuel to the engine 10, and the refluxed fuel exceeding the rated volume of the first fuel tank 20 can flow back into the second fuel tank 30 through the first air return pipe 28 and the second air return pipe 35. Since the first fuel filling pipe 27 and the second fuel filling pipe 34 are connected through the collecting chamber, the refluxed fuel exceeding the rated volume of the first fuel tank 20 can also flow back into the second fuel tank 30 through the first fuel filling pipe 27 and the second fuel filling pipe 34. The fuel system 100 of the embodiment of the present invention reduces the failure rate and ensures long cruising range. At the same time, when the first fuel pump 24 fails, the vehicle can still drive to the urban area or the maintenance station for maintenance, avoiding the situation where the vehicle cannot drive and can only wait for rescue.

[0046] In some embodiments of the present invention, the fuel system 100 may further include: a first liquid level sensor and a second liquid level sensor, wherein the first liquid level sensor is used to detect the oil level in the first fuel tank 20; and the second liquid level sensor is used to detect the oil level in the second fuel tank 30. The first liquid level sensor and the second liquid level sensor are provided to facilitate timely grasping of the oil levels in the first fuel tank 20 and the second fuel tank 30. When the first liquid level sensor detects that the fuel in the first fuel tank 20 is insufficient, the second fuel tank 30 supplies fuel to the engine 10, which helps to extend the vehicle's cruising range. When the second liquid level sensor also detects that the fuel in the second fuel tank 30 is insufficient, the driver can be reminded that the first fuel tank 20 and the second fuel tank 30 need to be refilled with fuel.

[0047] A specific embodiment of a fuel system 100 according to the present invention is provided below.

[0048] The fuel system 100 includes: an engine 10, a first fuel tank 20, a second fuel tank 30, a return oil pipe 22, a first fuel pump 24, a second fuel pump 31, a first fuel outlet pipe 25, a second fuel outlet pipe 32, and a main fuel pipe 11. A first liquid level sensor is provided in the first fuel tank 20, and the first liquid level sensor is used to detect the fuel level in the first fuel tank 20; a second liquid level sensor is provided in the second fuel tank 30, and the second liquid level sensor is used to detect the fuel level in the second fuel tank 30. The fuel outlet 21 of the first fuel tank 20 is connected to the first fuel outlet pipe 25, the fuel outlet 36 of the second fuel tank 30 is connected to the second fuel outlet pipe 32, and is connected to the fuel outlet 21 of the first fuel tank 20, and the main fuel pipe 11 is connected to the fuel inlet 13 of the engine 10. The fuel in the first fuel tank 20 and the second fuel tank 30 flows to the main fuel pipe 11 through the first fuel outlet pipe 25 and the second fuel outlet pipe 32 respectively, and the main fuel pipe 11 supplies fuel to the engine 10. The main fuel pipe 11 is provided with an oil filter 12 for filtering the fuel. The return pipe 22 connects the return port 14 of the engine 10 and the return port 23 of the first fuel tank 20, and the refluxed fuel can flow back to the first fuel tank 20 through the return pipe. The first fuel pump 24 is used to drive the oil in the first fuel tank 20 to flow to the engine 10; the second fuel pump 31 is used to drive the oil in the second fuel tank 30 to flow to the engine 10. The first fuel tank 20 and the second fuel tank 30 can independently supply fuel to the engine 10, ensuring that when one of the first fuel tank 20 and the second fuel tank 30 fails, the other can still work to ensure the vehicle's driving, reducing the failure rate and improving the vehicle's cruising range.

[0049] The fuel system 100 also includes a first one-way valve 26 and a second one-way valve 33. The first one-way valve 26 is arranged on the first oil outlet pipe 25 and the first one-way valve 26 allows the oil in the first fuel tank 20 to flow to the main oil pipe 11; the second one-way valve 33 is arranged on the second oil outlet pipe 32 and the second one-way valve 33 allows the oil in the second fuel tank 30 to flow to the main oil pipe 11.

[0050] The fuel system 100 also includes: a first refueling pipe 27, a second refueling pipe 34, a first air return pipe 28, a second air return pipe 35, and a main sleeve 29. The first refueling pipe 27 is connected to the refueling port of the first fuel tank 20; the second refueling pipe 34 is connected to the refueling port of the second fuel tank 30; the first air return pipe 28 is connected to the first fuel tank 20; the second air return pipe 35 is connected to the second fuel tank 30; the main sleeve 29 has a collecting cavity, and the first refueling pipe 27, the second refueling pipe 34, the first air return pipe 28 and the second air return pipe 35 are all connected to the collecting cavity.

[0051] The present invention also proposes a control method for the above-mentioned fuel system 100, referring to Figure 2 As shown, the control method of the fuel system 100 includes:

[0052] S1: Control the first oil pump to work and the second oil pump to stop working;

[0053] The first oil pump 24 supplies oil from the first oil tank 20 to the engine 10 , and the first oil tank 20 supplies oil to the engine 10 preferentially.

[0054] S2: When the oil level in the first oil tank drops to a first preset level value, the second oil pump is controlled to operate and the first oil pump is not controlled to operate;

[0055] The first liquid level sensor detects the oil level in the first fuel tank 20. When the oil level in the first fuel tank 20 drops to the first preset liquid level value, the vehicle control device switches to the second fuel tank 30 for oil supply by identifying the empty liquid level signal of the first liquid level sensor. At this time, the second oil pump 31 works and the first oil pump 24 does not work. Optionally, the first preset liquid level value can be a zero liquid level, indicating that the oil in the first fuel tank 20 has been used up at this time to avoid waste. In other embodiments, the first preset liquid level value can be 10ml, 20ml, 30ml, etc., so that the fuel in the first fuel tank 20 will not be exhausted, and a small amount of oil will remain, which can prevent the fuel impurities at the bottom of the fuel tank from entering the engine 10 with the fuel when there are many impurities.

[0056] S3: When the oil level in the second oil tank drops to a second preset level value, the first oil pump is controlled to operate again and the second oil pump is controlled not to operate;

[0057] During the fuel supply process of the second fuel tank 30, the fuel returning from the engine 10 can flow back to the return port 23 of the first fuel tank 20 through the return pipe 22, and the first fuel tank 20 stores the returning fuel. The second liquid level sensor detects the oil level in the second fuel tank 30. When the oil level in the second fuel tank 30 drops to the second preset liquid level value, the control device of the vehicle switches to the first fuel tank 20 for fuel supply by identifying the second preset liquid level value signal (e.g., zero liquid level signal) of the second liquid level sensor. At this time, the first oil pump 24 works and the second oil pump 31 does not work. Optionally, the second preset liquid level value can be a zero liquid level, indicating that the oil in the second fuel tank 30 has been used up at this time to avoid waste. In other embodiments, the second preset liquid level value can be 10ml, 20ml, 30ml, etc., so that the fuel in the second fuel tank 30 will not be exhausted, and a small amount of oil will remain, which can prevent the fuel impurities at the bottom of the fuel tank from entering the engine 10 with the fuel.

[0058] S4: When the oil level in the first oil tank drops to the first preset level value again, an oil shortage prompt message is issued.

[0059] When the oil level in the first fuel tank 20 drops to the first preset level value again, it indicates that the fuel in the first fuel tank 20 and the second fuel tank 30 has been consumed. At this time, the vehicle control device sends a fuel shortage message to remind the driver to refuel.

[0060] Since the first fuel tank 20 and the second fuel tank 30 of the fuel system 100 of the embodiment of the present invention can independently supply fuel to the engine 10, after the first fuel pump 24 fails, the second fuel tank 30 can still be used to supply fuel to the engine 10, allowing the vehicle to run normally for a period of time and then return to the city or a maintenance station, thereby avoiding the situation where the car cannot drive and can only wait for rescue on the spot.

[0061] Taking the first fuel tank 20 with a capacity of 80L and the second fuel tank 30 with a capacity of 53L as an example, the vehicle's endurance is described as follows:

[0062] a. If both the first fuel tank 20 and the second fuel tank 30 are full of fuel, the operation is switched to the second fuel tank 30, and the excess fuel can flow back to the second fuel tank 30 through the first return air pipe 28 and the second return air pipe 35 or the combination of the first return air pipe 28, the second return air pipe 35, the first refueling pipe 27 and the second refueling pipe 34 to achieve internal circulation. The overflow volume of the first fuel tank 20 that exceeds the rated volume is about 13L, so about 40L of the 53L fuel can achieve internal circulation, and the cruising range can reach several hundred kilometers.

[0063] b. The second fuel tank 30 is full of 53L of fuel, the first fuel tank 20 is empty, and the second fuel pump 31 can supply fuel for about 20 minutes. The vehicle can return to the city at a speed of 60 kilometers per hour in the suburbs for about 20 kilometers, and can reach a repair shop within 10 kilometers at a speed of 30 kilometers per hour in the city.

[0064] c. The second fuel tank 30 is half full of fuel, the first fuel tank 20 is empty, and the second fuel pump 31 can supply fuel for about 10 minutes. In the suburbs, the vehicle can travel about 10 kilometers back to the city at a speed of 60 kilometers per hour, and in the city, the vehicle can travel to a repair shop within 5 kilometers at a speed of 30 kilometers per hour.

[0065] According to the control method of the fuel system 100 of the embodiment of the present invention, the first fuel pump 24 and the second fuel pump 31 can work independently, ensuring that when one of the first fuel tank 20 and the second fuel tank 30 fails, the other fuel tank can still work to ensure the vehicle's driving, reducing the failure rate and improving the vehicle's cruising range. The first check valve 26 and the second check valve 33 can improve the problem of insufficient fuel supply pressure in the first fuel tank 20 and the second fuel tank 30.

[0066] In some embodiments of the present invention, when the oil level in the first fuel tank 20 does not drop to the first preset level value, if there is no oil pressure in the fuel rail of the engine 10, the current of the first fuel pump 24 is detected. When the current of the first fuel pump 24 is greater than the first preset current value or the current of the first fuel pump 24 is zero, it is prompted that the first fuel tank 20 is faulty and the second fuel pump 31 is controlled to work. The main failure of the fuel system is the failure of the fuel pump. The main manifestation of the failure of the first fuel pump 24 is: when the oil level in the first fuel tank 20 does not drop to the first preset level value, but there is no oil pressure in the fuel rail of the engine 10, the vehicle cannot run, and the current of the first fuel pump 24 needs to be detected through the vehicle control system. If the current of the first fuel pump 24 is too large, it is generally caused by the first fuel pump 24 being stuck or short-circuited; if there is no current in the first fuel pump 24, it is generally caused by the first fuel pump 24 being broken. By identifying the current of the first fuel pump 24, the vehicle control device displays the system failure of the first fuel tank 20 on the dashboard, prompting the user to switch to the second fuel tank 30 to work, and drive the vehicle to a nearby repair station for repair as soon as possible.

[0067] In some embodiments of the present invention, after the second oil pump 31 works for a preset time value, if the oil level of the second oil tank 30 does not change, the current of the second oil pump 31 is detected. When the current of the second oil pump 31 is greater than the second preset current value or the current of the second oil pump 31 is zero, it is prompted that the second oil tank 30 is faulty. The main manifestation of the failure of the second oil pump 31 is: after switching the second oil tank 30, after a period of time (for example, 3 minutes), it is identified that the oil levels of the first oil tank 20 and the second oil tank 30 do not change. At this time, the current of the second oil pump 31 needs to be detected by the vehicle control system. If the current of the second oil pump 31 is too large, it is generally caused by the second oil pump 31 being stuck or short-circuited; if there is no current in the second oil pump 31, it is generally caused by the second oil pump 31 being broken. By identifying the current of the second oil pump 31, the control device of the vehicle displays the system failure of the second oil tank 30 on the dashboard, prompting the user to drive the vehicle to a nearby repair station for repair as soon as possible.

[0068] The present invention also provides a vehicle, comprising the above-mentioned fuel system 100.

[0069] In the vehicle of the embodiment of the present invention, since the first fuel tank 20 and the second fuel tank 30 can independently supply fuel to the engine 10, it is ensured that when one of the first fuel tank 20 and the second fuel tank 30 fails, the other one can still work to ensure the driving of the vehicle, thereby reducing the failure rate and improving the cruising range of the vehicle.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel system, characterized in that: include: Engine (10); A first oil tank (20) and a second oil tank (30), wherein an oil outlet (21) of the first oil tank (20) and an oil outlet (36) of the second oil tank (30) are both directly or indirectly connected to an oil inlet (13) of the engine (10); An oil return pipe (22), the oil return pipe (22) connecting the oil return port (14) of the engine (10) and the oil return port (23) of the first oil tank (20); a first oil pump (24), the first oil pump (24) being used to drive the oil in the first oil tank (20) to flow toward the engine (10); a second oil pump (31), the second oil pump (31) being used to drive the oil in the second oil tank (30) to flow toward the engine (10); a first one-way valve (26), the first one-way valve (26) being arranged between the oil outlet (21) of the first oil tank (20) and the oil inlet (13) of the engine (10) and allowing the oil in the first oil tank (20) to flow into the engine (10); A second one-way valve (33), wherein the second one-way valve (33) is arranged between the oil outlet (36) of the second oil tank (30) and the oil inlet (13) of the engine (10) and allows the oil in the second oil tank (30) to flow into the engine (10).

2. The fuel system according to claim 1, characterized in that: Also includes: A first oil outlet pipe (25), the first oil outlet pipe (25) being connected to an oil outlet (21) of the first oil tank (20); a second oil outlet pipe (32), the second oil outlet pipe (32) being connected to an oil outlet (36) of the second oil tank (30); A main oil pipe (11), the main oil pipe (11) is connected to the oil inlet (13) of the engine (10), and the first oil outlet pipe (25) and the second oil outlet pipe (32) are both connected to the main oil pipe (11).

3. The fuel system according to claim 2, characterized in that: The first one-way valve (26) is arranged on the first oil outlet pipe (25) and allows the oil in the first oil tank (20) to flow into the main oil pipe (11), and the second one-way valve (33) is arranged on the second oil outlet pipe (32) and allows the oil in the second oil tank (30) to flow into the main oil pipe (11).

4. The fuel system according to claim 2, characterized in that: An oil filter (12) is provided on the main oil pipe (11).

5. The fuel system according to claim 1, characterized in that: Also includes: a first refueling pipe (27), the first refueling pipe (27) being connected to a refueling port of the first fuel tank (20); a second refueling pipe (34), the second refueling pipe (34) being connected to the refueling port of the second fuel tank (30); a first air return pipe (28), the first air return pipe (28) being in communication with the first oil tank (20); a second air return pipe (35), the second air return pipe (35) being in communication with the second oil tank (30); A main sleeve (29), wherein the main sleeve (29) has a collecting chamber, and the first refueling pipe (27), the second refueling pipe (34), the first air return pipe (28) and the second air return pipe (35) are all in communication with the collecting chamber.

6. The fuel system according to claim 1, characterized in that: Also includes: a first liquid level sensor, the first liquid level sensor being used to detect the oil level in the first oil tank (20); A second liquid level sensor, the second liquid level sensor is used to detect the oil level in the second oil tank (30).

7. A method for controlling a fuel system according to any one of claims 1 to 6, characterized in that: include: Controlling the first oil pump (24) to operate and the second oil pump (31) to not operate; When the oil level in the first oil tank (20) drops to a first preset level value, the second oil pump (31) is controlled to operate and the first oil pump (24) is controlled to stop operating; When the oil level in the second oil tank (30) drops to a second preset level value, the first oil pump (24) is controlled to operate again and the second oil pump (31) is controlled to stop operating; When the oil level in the first oil tank (20) drops to the first preset level value again, an oil shortage prompt message is issued.

8. The fuel system control method according to claim 7, characterized in that: When the oil level in the first oil tank (20) has not dropped to the first preset level value, if the oil rail of the engine (10) has no oil pressure, the current of the first oil pump (24) is detected, and when the current of the first oil pump (24) is greater than the first preset current value or the current of the first oil pump (24) is zero, it is indicated that the first oil tank (20) is faulty, and the second oil pump (31) is controlled to operate.

9. The fuel system control method according to claim 7, characterized in that: After the second oil pump (31) operates for a preset time value, if the oil level in the second oil tank (30) does not change, the current of the second oil pump (31) is detected, and when the current of the second oil pump (31) is greater than a second preset current value or the current of the second oil pump (31) is zero, it is indicated that the second oil tank (30) is faulty.

10. A vehicle, characterized in that: A fuel system comprising the fuel system described in any one of claims 1-6.

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