Vehicle, fuel control system and method thereof

Abstract

The present application provides a vehicle, a fuel control system and a method for the vehicle. The fuel control system of the vehicle includes: a first oil delivery component, which is arranged in a main oil tank and is provided with a first liquid level gauge and a first solenoid valve; the first liquid level gauge is used to measure the liquid level of the main oil tank, and the first solenoid valve is used to open or close the first oil delivery component. A second oil delivery component, which is arranged in an auxiliary oil tank, is provided with a second liquid level gauge and a second solenoid valve; the second liquid level gauge is used to measure the liquid level of the auxiliary oil tank, and the second solenoid valve is used to open or close the second oil delivery component. A fuel pump is connected to the first oil delivery component and the second oil delivery component, and is used to rotate forward or reversely to transport fuel between the first oil delivery component and the second oil delivery component. A controller is used to control the opening and closing of the first solenoid valve, the opening and closing of the second solenoid valve, and the rotation direction of the fuel pump according to the working conditions of the vehicle and the measurement results of the first liquid level gauge and the second liquid level gauge.

Description

Technical Field

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

[0002] Multi-tank vehicles are generally equipped with two fuel tanks, hereinafter referred to as the main tank and the auxiliary tank. The capacity of the main tank is generally larger than that of the auxiliary tank. The main and auxiliary tanks are connected by a bottom connecting pipe structure to achieve a liquid level connection function.

[0003] At present, the liquid level gauge is only installed on the main fuel tank. When the vehicle is running, the fuel in the main tank is consumed quickly. Due to the structural limitations of the connecting pipe and the low delivery rate, the auxiliary tank cannot replenish the fuel to the main tank through the connecting pipe in time. When the liquid level gauge in the main tank detects that the liquid level has dropped to the alarm point, there is still a large amount of fuel in the auxiliary tank. At this time, the driver has gone to the gas station to prepare for refueling, resulting in incomplete use of the fuel in the auxiliary tank, the cruising range does not reach the designed mileage, and the user experience is poor. Summary of the invention

[0004] The present application provides a vehicle, a fuel control system and a method for the vehicle to solve the problems in the prior art.

[0005] In a first aspect, an embodiment of the present application provides a fuel control system for a vehicle, the vehicle comprising a main fuel tank and at least one auxiliary fuel tank, the control system comprising:

[0006] A first oil delivery component is used to be arranged in a main oil tank, and the first oil delivery component is provided with a first liquid level gauge and a first solenoid valve; the first liquid level gauge is used to measure the liquid level of the main oil tank, and the first solenoid valve is used to open or close the first oil delivery component;

[0007] At least one second oil delivery assembly, corresponding to the number of the auxiliary oil tanks, used to be arranged in the auxiliary oil tank; the second oil delivery assembly is provided with a second liquid level gauge and a second solenoid valve; the second liquid level gauge is used to measure the liquid level of the auxiliary oil tank, and the second solenoid valve is used to open or close the second oil delivery assembly;

[0008] A fuel pump, comprising a first fuel pipe interface and a second fuel pipe interface, wherein the first fuel pipe interface is connected to the first fuel delivery component, and the second fuel pipe interface is connected to the second fuel delivery component, and the fuel pump is used to rotate forward or reversely to deliver fuel between the first fuel delivery component and the second fuel delivery component;

[0009] A controller is electrically connected to the first liquid level gauge, the second liquid level gauge, the first solenoid valve, the second solenoid valve and the fuel pump, and is used to control the opening and closing of the first solenoid valve, the opening and closing of the second solenoid valve and the rotation direction of the fuel pump according to the working condition of the vehicle and the measurement results of the first liquid level gauge and the second liquid level gauge.

[0010] Optionally, the first oil delivery component includes:

[0011] A first connector for being arranged on the main oil tank, comprising a first oil delivery pipe interface connected to the first connecting pipeline; the first solenoid valve is arranged on the first connector;

[0012] The first oil pipeline is used to extend into the main oil tank; the first oil pipeline is connected to the first oil pipeline interface; the first liquid level meter is arranged at the portion of the first oil pipeline extending into the main oil tank.

[0013] Optionally, the second oil delivery component includes:

[0014] A second joint for being arranged on the auxiliary oil tank, comprising a second oil delivery pipe interface connected to the second connecting pipeline; the second solenoid valve is arranged on the second joint;

[0015] The second oil pipeline is used to extend into the auxiliary oil tank; the second oil pipeline is connected to the second oil pipeline interface; the second liquid level gauge is arranged at the portion of the second oil pipeline extending into the auxiliary oil tank.

[0016] Optionally, there are two auxiliary oil tanks and two second oil delivery components; the control system further includes:

[0017] A pipeline tee, comprising a first interface, a second interface and a third interface, wherein the first interface is connected to the second oil pipe interface;

[0018] A first connecting pipeline, connected between the first oil delivery component and the first oil pipe interface;

[0019] Two second connecting pipelines, one of the second connecting pipelines is connected between the second interface and one of the second oil delivery components, and the other second connecting pipeline is connected between the third interface and another second oil delivery component.

[0020] Optionally, a slope sensor is further included to measure the state of the road surface on which the vehicle is currently traveling; the slope sensor is electrically connected to the controller, and the controller is also used to determine the working condition of the vehicle based on the measurement result of the slope sensor.

[0021] In a second aspect, an embodiment of the present application provides a vehicle, comprising a main fuel tank, at least one auxiliary fuel tank and a control system as described in the first aspect; the first oil delivery component is arranged in the main fuel tank, and the second oil delivery component is arranged in the auxiliary fuel tank.

[0022] Optionally, there are two auxiliary oil tanks, and there are two second oil delivery assemblies, and the two second oil delivery assemblies are respectively arranged on the two auxiliary oil tanks;

[0023] The fuel system also includes a main bracket, the main fuel tank is arranged on the side of the main bracket, the first auxiliary fuel tank is arranged on the side of the main bracket opposite to the main fuel tank, and the second auxiliary fuel tank is arranged on the top of the main bracket; the fuel pump is arranged on the main bracket, and the controller is integrated with the fuel pump.

[0024] Optionally, it also includes an auxiliary bracket, which is arranged on the top of the main bracket, and the second auxiliary fuel tank is arranged on the top of the auxiliary bracket.

[0025] In a third aspect, an embodiment of the present application provides a fuel control method for a vehicle, the control method comprising:

[0026] Determine the current operating condition of the vehicle, the operating condition including a running state and a shutdown state;

[0027] When the vehicle is in operation, a fuel delivery strategy is executed to deliver fuel to the main fuel tank through the auxiliary fuel tank;

[0028] When the vehicle is in a stopped state, the liquid level changes of the main fuel tank and the auxiliary fuel tank are determined; if the liquid level of the main fuel tank or the auxiliary fuel tank continues to rise, a refueling strategy is executed.

[0029] Optionally, when the vehicle is in a running state, executing an oil transfer strategy to transfer oil from the auxiliary oil tank to the main oil tank includes:

[0030] Determine the road condition on which the vehicle is currently traveling, wherein the road condition includes a slope road condition and a flat road condition;

[0031] When the road condition is a slope road condition, executing the slope oil delivery strategy;

[0032] When the road condition is a flat road condition, a flat oil delivery strategy is executed.

[0033] Optionally, determine the road condition that the vehicle is currently traveling on, including:

[0034] Determining whether the liquid level of the main oil tank or the auxiliary oil tank jumps beyond a set amplitude;

[0035] If the liquid level of the main fuel tank or the auxiliary fuel tank jumps beyond a set amplitude and tends to be stable, it is determined that the road condition is a slope road condition;

[0036] If the liquid level of the main fuel tank or the auxiliary fuel tank does not jump, it is determined that the road condition is a flat road condition.

[0037] Optionally, determine the road condition that the vehicle is currently traveling on, including:

[0038] Determine whether the slope of the road on which the vehicle is currently traveling exceeds a set slope;

[0039] When the slope value exceeds the set slope, the road condition is determined to be a slope road condition;

[0040] When the slope value does not exceed the set slope, it is determined that the road condition is a flat road condition.

[0041] Optionally, the oil delivery strategy includes:

[0042] Determining whether the liquid level of the main oil tank is lower than a first set liquid level;

[0043] If the liquid level of the main oil tank is lower than the first set liquid level, determining whether the liquid level of the auxiliary oil tank is higher than the second set liquid level;

[0044] If the liquid level of the auxiliary oil tank is higher than the second set liquid level, oil is transported to the main oil tank through the auxiliary oil tank.

[0045] Optionally, the auxiliary oil tank includes a first auxiliary oil tank and a second auxiliary oil tank, which are respectively connectable to the main oil tank; the slope oil delivery strategy includes:

[0046] determining whether the liquid level of the main oil tank is lower than a first liquid level;

[0047] If the liquid level of the main tank is lower than the first liquid level, determining whether the liquid level of the first auxiliary tank is higher than the second liquid level;

[0048] If the liquid level of the first auxiliary tank is higher than the second liquid level, oil is transported to the main tank through the first auxiliary tank;

[0049] If the liquid level of the first auxiliary tank is lower than the second liquid level, determining whether the liquid level of the second auxiliary tank is higher than a third liquid level;

[0050] If the liquid level of the second auxiliary oil tank is higher than the third liquid level, oil is transported to the main oil tank through the second auxiliary oil tank;

[0051] If the liquid level of the main oil tank reaches the fourth liquid level, or the liquid level of the second auxiliary oil tank is lower than the third liquid level, the oil delivery is stopped.

[0052] Optionally, the auxiliary oil tank includes a first auxiliary oil tank and a second auxiliary oil tank, which are respectively connectable to the main oil tank; the planar oil delivery strategy includes:

[0053] determining whether the liquid level of the main oil tank is lower than a fifth liquid level;

[0054] If the liquid level of the main tank is lower than the fifth liquid level, determining whether the liquid level of the first auxiliary tank is higher than the sixth liquid level;

[0055] If the liquid level of the first auxiliary oil tank is higher than the sixth liquid level, oil is transported to the main oil tank through the first auxiliary oil tank;

[0056] If the liquid level of the first auxiliary tank is lower than the sixth liquid level, determining whether the liquid level of the second auxiliary tank is higher than the seventh liquid level;

[0057] If the liquid level of the second auxiliary oil tank is higher than the seventh liquid level, oil is transported to the main oil tank through the second auxiliary oil tank;

[0058] If the liquid level of the main oil tank reaches the eighth liquid level, or the liquid level of the second auxiliary oil tank is lower than the seventh liquid level, the oil delivery is stopped.

[0059] Optionally, if the liquid level of the main fuel tank or the auxiliary fuel tank continues to rise, a refueling strategy is executed, including:

[0060] If the liquid level of the main fuel tank continues to rise, it is determined that the vehicle is currently refueling using the main fuel tank, and a first refueling strategy is executed to transfer fuel from the main fuel tank to the auxiliary fuel tank;

[0061] If the liquid level of the auxiliary fuel tank continues to rise, it is determined that the vehicle is currently using the auxiliary fuel tank for refueling, and a second refueling strategy is executed to transfer oil to the main fuel tank through the auxiliary fuel tank.

[0062] Optionally, executing the first refueling strategy to transfer oil from the main oil tank to the auxiliary oil tank includes:

[0063] determining whether the liquid level of the main oil tank is lower than a ninth liquid level;

[0064] If the liquid level of the main tank is higher than the ninth liquid level, determining whether the liquid level of the auxiliary tank has reached the tenth liquid level;

[0065] If the liquid level of the auxiliary oil tank has not reached the tenth liquid level, determining whether the decreasing speed of the liquid level of the main oil tank exceeds a set speed;

[0066] If the decreasing speed of the liquid level of the main oil tank does not exceed the set speed, the main oil tank is maintained to transfer oil to the auxiliary oil tank;

[0067] If the falling speed of the liquid level of the main oil tank exceeds the set speed, or the liquid level of the main oil tank is lower than the ninth liquid level, or the liquid level of the auxiliary oil tank reaches the tenth liquid level, the oil delivery is stopped.

[0068] Optionally, executing the second refueling strategy to transfer oil from the auxiliary fuel tank to the main fuel tank includes:

[0069] determining whether the liquid level of the auxiliary oil tank is lower than an eleventh liquid level;

[0070] If the liquid level of the auxiliary oil tank is higher than the eleventh liquid level, determining whether the liquid level of the main oil tank has reached the twelfth liquid level;

[0071] If the liquid level of the main oil tank has not reached the twelfth liquid level, determining whether the decreasing speed of the liquid level of the auxiliary oil tank exceeds a set speed;

[0072] If the decreasing speed of the liquid level of the auxiliary oil tank does not exceed the set speed, the auxiliary oil tank is maintained to transfer oil to the main oil tank;

[0073] If the descending speed of the liquid level of the auxiliary oil tank exceeds the set speed, or the liquid level of the auxiliary oil tank is lower than the eleventh liquid level, or the liquid level of the main oil tank reaches the twelfth liquid level, the oil delivery is stopped.

[0074] The fuel control system of the vehicle provided in the present application monitors the liquid level information of the main fuel tank and the auxiliary fuel tank respectively through the first liquid level gauge and the second liquid level gauge, and controls the working status of the fuel pump, the first solenoid valve and the second solenoid valve to deliver fuel to the main fuel tank on demand, thereby improving fuel utilization and solving the problem of insufficient cruising range caused by incomplete fuel consumption in multiple fuel tanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 is a partial schematic diagram of a vehicle provided by an embodiment of the present application;

[0076] Figure 2 is a structural schematic diagram of a fuel pump provided by an embodiment of the present application;

[0077] Figure 3 is a structural schematic diagram of a first oil delivery assembly provided by an embodiment of the present application;

[0078] Figure 4 is a structural schematic diagram of a second oil delivery assembly provided by an embodiment of the present application;

[0079] Figure 5 It is a connection diagram of a fuel pump, a first oil delivery component and a second oil delivery component provided by an embodiment of the present application;

[0080] Figures 6 to 14It is a flowchart of the fuel control method provided by different embodiments of the present application. DETAILED DESCRIPTION

[0081] Here, the technical solutions in the embodiments (or "implementation methods") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0082] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0083] The vehicle, the vehicle fuel control system and the method of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0084] See also Figure 1 and Figure 2 As shown, an embodiment of the present application provides a vehicle, including a main fuel tank 10, at least one auxiliary fuel tank 20, and a fuel control system. The fuel control system may include:

[0085] The first oil delivery component 30 is disposed in the main oil tank 10 and is provided with a first liquid level gauge 31 and a first solenoid valve 32. The first liquid level gauge 31 is used to measure the liquid level of the main oil tank 10, and the first solenoid valve 32 is used to open or close the first oil delivery component 30.

[0086] At least one second oil delivery assembly 40 is provided in the auxiliary oil tank 20, corresponding to the number of the auxiliary oil tanks 20. The second oil delivery assembly 40 is provided with a second liquid level gauge 41 and a second solenoid valve 42. The second liquid level gauge 41 is used to measure the liquid level of the auxiliary oil tank 20, and the second solenoid valve 42 is used to open or close the second oil delivery assembly 40. Optionally, Figure 1In the example, two auxiliary oil tanks and two second oil delivery assemblies are respectively arranged in the two auxiliary oil tanks, and the two auxiliary oil tanks are respectively represented by the first auxiliary oil tank 20a and the second auxiliary oil tank 20b, and the two second oil delivery assemblies are respectively represented by 40a and 40b, and the second oil delivery assembly 40a is arranged in the auxiliary oil tank 20a, and the second oil delivery assembly 40b is arranged in the auxiliary oil tank 20b. The second oil delivery assembly 40a is provided with a second liquid level gauge 41a and a second solenoid valve 42a. The second oil delivery assembly 40b is provided with a second liquid level gauge 41b and a second solenoid valve 42b.

[0087] Fuel pump 50, combined Figure 1 and Figure 2 As shown, the fuel pump 50 includes a first oil pipe interface 51 and a second oil pipe interface 52, wherein the first oil pipe interface 51 is connected to the first oil delivery component 30, and the second oil pipe interface 52 is connected to the second oil delivery component 40. The fuel pump 50 is used to rotate forward or reverse to achieve a change in the fuel delivery direction so that the fuel can be delivered between the first oil delivery component 30 and the second oil delivery component 40.

[0088] The controller is electrically connected to the first liquid level gauge 31, the second liquid level gauge 41, the first solenoid valve 32, the second solenoid valve 42 and the fuel pump 50, and the controller is used to control the opening and closing of the first solenoid valve 32, the opening and closing of the second solenoid valve 42 and the rotation direction of the fuel pump 50 according to the working condition of the vehicle and the measurement results of the first liquid level gauge 31 and the second liquid level gauge 41. Optionally, the controller can be integrated on the fuel pump 50. The determination method of the vehicle working condition and the specific control method are described in detail below.

[0089] The fuel control system of the vehicle provided in the present application monitors the liquid level information of the main fuel tank 10 and the auxiliary fuel tank 20 respectively through the first liquid level gauge 31 and the second liquid level gauge 41, and then controls the working status of the fuel pump 50, the first solenoid valve 32 and the second solenoid valve 42 through the controller in combination with the working condition of the vehicle, and delivers fuel to the main fuel tank 10 on demand, thereby improving fuel utilization and solving the problem of insufficient cruising range caused by incomplete fuel consumption in multiple fuel tanks.

[0090] In some optional embodiments, the vehicle further includes a main bracket 80, and the main fuel tank 10 and the auxiliary fuel tank 20 are both arranged on the main bracket 80. The fuel pump 50 is arranged on the main bracket 80, and the controller is integrated with the fuel pump 50. The main bracket 80 can be a frame part of the vehicle, so that the main fuel tank and the auxiliary fuel tank are reasonably distributed on the main bracket, which takes up less space and has a reasonable layout.

[0091] Take two auxiliary fuel tanks as an example, the two auxiliary fuel tanks are respectively the first auxiliary fuel tank 20a and the second auxiliary fuel tank 20b, the main fuel tank 10 is arranged on the side of the main bracket 80 (the left side shown in the figure), the first auxiliary fuel tank 20a is arranged on the side of the main bracket 80 on the other side relative to the main fuel tank 10 (the right side shown in the figure), and the second auxiliary fuel tank 20b is arranged on the top of the main bracket 80. Further, the vehicle may also include an auxiliary bracket 90, which is arranged on the top of the main bracket 80, and the second auxiliary fuel tank 20b is arranged on the top of the auxiliary bracket 90. It can be understood that the main bracket can adopt a beam structure in order to reduce weight, and the middle part has a hollow, and the support strength is low. The second auxiliary fuel tank 20b is supported by the auxiliary bracket 90, which can improve the support strength of the main bracket for the second auxiliary fuel tank 20b.

[0092] See also Figure 3 As shown, in some optional embodiments, the first oil delivery component 30 includes a first joint 33 and a first oil delivery pipe 34. The first joint 33 is provided at the main oil tank 10, and the first joint 33 includes a first oil delivery pipe interface 331, which is connected to the first oil delivery pipe interface 51 of the fuel pump 50. The first oil delivery pipe 34 is connected to the first oil delivery pipe interface 331 and extends into the main oil tank 10, and is used to transport the fuel in the main oil tank 10. The fuel pump 50 is connected to the first oil delivery pipe 34 through the first oil delivery pipe interface 331. The first solenoid valve 32 is integrated with the first joint 33. The first solenoid valve 32 is a normally closed solenoid valve, which is used to open or close the first oil delivery pipe interface 331. The first liquid level gauge 31 is provided at the portion of the first oil delivery pipe 34 extending into the main oil tank 10, and is used to detect the liquid level in the main oil tank 10.

[0093] Optionally, the first joint 33 also includes a return oil pipe interface 332 and an outlet oil pipe interface 333, and both the return oil pipe interface 332 and the outlet oil pipe interface 333 are connected to the engine of the vehicle. The first oil delivery assembly 30 also includes a return oil pipe 35, an outlet oil pipe 36, and a first filter 37. The return oil pipe 35 is connected to the return oil pipe interface 332, and the outlet oil pipe 36 is connected to the outlet oil pipe interface 333, and is used to deliver the fuel in the main oil tank to the engine to provide fuel for the operation of the vehicle. The first filter 37 is coated on the bottom ends of the first oil delivery pipe 34, the return oil pipe 35, and the outlet oil pipe 36, and is used to filter the oil in the main oil tank.

[0094] The first liquid level gauge 31 includes a first float 311 and a first reed switch. The first reed switch is a magnetic sensitive switch. It cooperates with the first float 311 and can change the resistance value according to the different positions of the first float 311. The first float 311 is a hollow float, which is arranged at the part where the first oil delivery pipe 34 extends into the main oil tank 10. It can be raised and lowered according to the change of the liquid level, thereby changing the output resistance of the first reed switch. The first float 311 cooperates with the first reed switch to realize the monitoring of the liquid level in the main oil tank.

[0095] See also Figure 4 As shown, in some optional embodiments, the second oil delivery component 40 includes a second joint 43 and a second oil delivery pipe 44. The second joint 43 is arranged at the auxiliary fuel tank 20, and the second joint 43 includes a second oil delivery pipe interface 431, which is connected to the second oil delivery pipe interface 52 of the fuel pump 50. The second oil delivery pipe 44 extends into the auxiliary fuel tank 20 and is connected to the second oil delivery pipe interface 431, and is used to transport the fuel in the auxiliary fuel tank 20. The fuel pump 50 is connected to the second oil delivery pipe 44 through the second oil delivery pipe interface 431. The second solenoid valve 42 is arranged at the second joint 43. The second solenoid valve 42 is a normally closed solenoid valve, which is used to open or close the second oil delivery pipe interface 431. The second liquid level gauge 41 is arranged at the part of the second oil delivery pipe 44 extending into the auxiliary fuel tank 20, and is used to detect the liquid level in the auxiliary fuel tank 20.

[0096] Optionally, the second oil delivery component 40 also includes a support pipe 45 and a second filter 46, and the support pipe 45 is used to support the second oil delivery pipe 44. The second filter 46 is coated on the bottom ends of the second oil delivery pipe 44 and the support pipe 45, and is used to filter the oil in the auxiliary oil tank. The second liquid level gauge 41 includes a second float 411 and a second reed switch. The second reed switch is a magnetic sensitive switch, which cooperates with the second float 411 and can change the resistance value according to the different positions of the second float 411. The second float 411 is a hollow float, which is arranged on the part of the second oil delivery pipe 44 extending into the auxiliary oil tank 20, and can be raised and lowered according to the change of the liquid level, thereby changing the output resistance of the second reed switch. The second float 411 cooperates with the second reed switch to realize the monitoring of the liquid level in the auxiliary oil tank.

[0097] In some optional embodiments, the control system further includes: a pipeline tee 60, a first connecting pipeline 71 and two second connecting pipelines. Figure 1 The second connecting pipeline a and the second connecting pipeline b are used. Figure 1 and Figure 5As shown, the pipeline tee 60 includes a first interface 61, a second interface 62 and a third interface 63, wherein the first interface 61 is connected to the second oil pipe interface 52 of the fuel pump 50. The first connecting pipeline 71 is connected between the first oil delivery component 30 (which can be connected to the first oil delivery pipe interface 331) and the first oil pipe interface 51. The second connecting pipeline 72a is connected between the second interface 62 and the second oil delivery component 40a (which can be connected to the second oil delivery pipe interface 431 of the second oil delivery component 40a), and the second connecting pipeline 72b is connected between the third interface 63 and the second oil delivery component 40b (which can be connected to the second oil delivery pipe interface 431 of the second oil delivery component 40b). The first oil delivery component 30, the second oil delivery component 40a and the second oil delivery component 40b are connected to the fuel pump 50 through the pipeline tee 60. The fuel pump 50 rotates forward, and the fuel is delivered from the main tank 10 to the auxiliary tank 20. The fuel pump 50 rotates in the reverse direction, and the fuel is delivered from the sub-tank 20 to the main tank 10 .

[0098] In some optional embodiments, the vehicle may also include an engine ECU 91 (on-board computer, electronic control unit) and an instrument, which are all electrically connected to the controller. The controller, the engine ECU and the instrument adopt a CAN network communication mode. The first liquid level gauge 31, the second liquid level gauge information 41a and the second liquid level gauge 41b can be used as sensors, and the instrument, the fuel pump 50, the first solenoid valve 32, the second solenoid valve 42a and the second solenoid valve 42b can be used as actuators. The liquid level gauge is used to measure the liquid level height of each fuel tank; the solenoid valve is used to open or close the pipeline channel of each oil delivery component; the fuel pump is used to deliver fuel; the instrument is used to display information such as the liquid level; the controller is used to receive the signals of each sensor, analyze and judge, and output control instructions; the engine ECU is used to collect the signals of each engine sensor and calculate and analyze and output control instructions.

[0099] When the system is working, the first liquid level meter 31, the second liquid level meter information 41a and the second liquid level meter 41b respectively collect the liquid level conditions of the main fuel tank 10, the first auxiliary fuel tank 20a and the second auxiliary fuel tank 20b, and send them to the controller. The controller determines the liquid level conditions of each fuel tank after analysis and calculation, and can judge whether the current vehicle is in a flat road condition or an uphill or downhill condition, and whether it is in a refueling state or a non-refueling state according to the change law of the liquid level signal of each fuel tank. The engine ECU sends the engine speed information to the controller, and the controller determines whether the vehicle is in a running state or a shutdown state after analysis and calculation. Control the working state of the fuel pump 50, the opening or closing of the first solenoid valve 32, the second solenoid valve 42a and the second solenoid valve 42b. The controller collects and calculates the liquid level information collected by each liquid level meter and transmits it to the instrument through the CAN network, so as to accurately display the liquid level. The controller can also monitor the working status of each sensor and actuator. When a sensor or actuator fails, it will record the fault, shut down all actuators, and transmit the fault information to the instrument through the CAN network, which will display the fault light.

[0100] When refueling, the controller adjusts the working state of the fuel pump and the solenoid valve according to the liquid level information of each fuel tank, realizes the fuel delivery during the refueling process, thereby ensuring that the filling amount meets the design state, solving the problem of insufficient filling, and the application of this system can meet the requirements. When the vehicle is running, the controller adjusts the working state of the fuel pump and the solenoid valve according to the liquid level information of each fuel tank, so that the liquid level of the main fuel tank is kept at a high level to the maximum extent and the liquid level of the auxiliary fuel tank is reduced to the minimum to the maximum extent, thereby solving the problem of insufficient power caused by poor oil absorption on uphill and downhill slopes and the problem of insufficient cruising range caused by incomplete fuel consumption, reducing customer complaints.

[0101] The present application can monitor the liquid level information of each fuel tank in real time through each liquid level gauge, and judge whether it is currently in a refueling condition through the change pattern of the main fuel tank liquid level signal. When in the refueling condition, the controller controls the working state of the fuel pump and the solenoid valve according to the set strategy, thereby realizing the function of filling all fuel tanks from the main fuel tank at one time, avoiding the problem of the filling amount failing to reach the set value and the liquid level display being insufficient. The whole process is fully automated and precisely controlled. It is an intelligent closed-loop control system, which greatly improves the convenience of refueling and improves the user experience.

[0102] Furthermore, the fuel control system may also include a slope sensor 94 for measuring the state of the road surface on which the vehicle is currently traveling. The slope sensor 94 is electrically connected to the controller 93, and the controller 93 is also used to determine the working condition of the vehicle according to the measurement result of the slope sensor 94. In this way, the measurement signal of the slope sensor is used to determine whether the vehicle is currently in an uphill or downhill working condition or in a flat road running condition.

[0103] See also Figure 6As shown, an embodiment of the present application provides a fuel control method for a vehicle, and the vehicle may be the vehicle described in the above embodiments and implementation methods. The vehicle includes a main fuel tank and at least one auxiliary fuel tank that can be connected to the main fuel tank. The control method includes:

[0104] The current working condition of the vehicle is determined, wherein the working condition includes a running state and a shutdown state. When the engine speed is 0, the vehicle is in the shutdown state. When the engine speed is not 0, the vehicle is in the running state.

[0105] When the vehicle is in operation, the oil transfer strategy is executed to transfer oil to the main oil tank through the auxiliary oil tank.

[0106] When the vehicle is in a stopped state, the liquid level changes of the main tank and the auxiliary tank are determined; if the liquid level of the main tank or the auxiliary tank continues to rise, the refueling strategy is executed. If the liquid level of the main tank or the auxiliary tank does not continue to rise, the control system is in standby mode.

[0107] It can be understood that the controller can collect the engine speed in the engine ECU. When the engine speed is 0, it is judged that the current vehicle is in a shutdown state. The liquid level gauge signals of the main fuel tank and the auxiliary fuel tank are continuously monitored. When the liquid level of the main fuel tank or the auxiliary fuel tank continues to rise, it is judged that the current vehicle is in a refueling condition, and the refueling strategy is executed. The controller controls the opening or closing of each solenoid valve and the rotation direction of the fuel pump according to the actual situation to control the flow direction of the fuel. When the liquid level signals of the main fuel tank and the auxiliary fuel tank do not continue to rise, it is judged that the current vehicle is in a non-refueling condition, and the control system is on standby at this time. When the engine speed is not 0, it is judged that the vehicle is currently in a running state, and the oil delivery strategy is executed. The controller controls the opening or closing of each solenoid valve and the rotation direction of the fuel pump according to the actual situation to control the flow direction of the fuel.

[0108] In this way, different control strategies are implemented according to different working conditions and states of the vehicle. The liquid level information of each fuel tank is collected through each liquid level meter, and the controller determines whether the current vehicle is in the operating condition or the refueling condition. If it is in the refueling condition, the controller can identify which fuel tank is currently being used for refueling, and realize the on-demand fuel delivery function between multiple fuel tanks by controlling the forward and reverse rotation, speed and opening and closing of each solenoid valve of the fuel pump. The function of filling multiple fuel tanks with fuel from any fuel tank can be realized, which improves the convenience of fuel refueling for vehicles with multiple fuel tanks. The liquid level height of each fuel tank during the refueling process can be accurately identified, and the fuel filling amount of each fuel tank can be accurately controlled by controlling the fuel pump and each solenoid valve, so that the filling amount of each fuel tank reaches the designed capacity, solving the problem of filling amount lower than the designed capacity and the problem of the instrument display being not full after filling. By controlling the working state of the fuel pump and each solenoid valve, fuel is delivered to the main fuel tank on demand, thereby improving the fuel utilization rate, solving the problem of insufficient cruising range caused by incomplete fuel consumption of multiple fuel tanks and the problem of insufficient fuel supply in low liquid level uphill and downhill conditions.

[0109] In some optional embodiments, when the vehicle is in operation, an oil transfer strategy is executed to transfer oil to the main oil tank through the auxiliary oil tank, including: determining the road condition on which the vehicle is currently traveling, the road condition including slope road conditions and flat road conditions; when the road condition is a slope road condition, executing the slope oil transfer strategy; when the road condition is a flat road condition, executing the flat oil transfer strategy.

[0110] In this way, different oil delivery strategies can be implemented according to different road conditions.

[0111] The above determination of the current road condition of the vehicle can be achieved in the following two ways:

[0112] (1) See Figure 7 As shown, the first method includes:

[0113] Determining whether the liquid level of the main oil tank or the auxiliary oil tank jumps beyond a set amplitude;

[0114] If the liquid level of the main oil tank or the auxiliary oil tank jumps beyond the set amplitude and tends to be stable, it is determined that the road condition is a slope road condition, and the slope oil delivery strategy is executed;

[0115] If the liquid level of the main fuel tank or the auxiliary fuel tank does not jump, it is determined that the road condition is a flat road condition, and a flat oil delivery strategy is executed.

[0116] (2) See Figure 8 As shown, the second method includes:

[0117] Determine whether the slope of the road on which the vehicle is currently traveling exceeds a set slope; optionally, the set slope may be ±3°.

[0118] When the slope value exceeds the set slope, the road condition is judged to be a slope road condition, and a slope oil delivery strategy is executed;

[0119] When the slope value does not exceed the set slope, the road condition is determined to be a flat road condition, and a flat oil delivery strategy is executed.

[0120] See also Fig. 9 As shown, in some optional embodiments, the oil delivery strategy includes:

[0121] Determining whether the liquid level of the main oil tank is lower than a first set liquid level;

[0122] If the liquid level of the main oil tank is lower than the first set liquid level, determining whether the liquid level of the auxiliary oil tank is higher than the second set liquid level;

[0123] If the liquid level of the auxiliary oil tank is higher than the second set liquid level, oil is transported to the main oil tank through the auxiliary oil tank.

[0124] In this way, when the fuel reserve in the main tank is too low and the fuel reserve in the auxiliary tank has surplus fuel, the rotation direction of the fuel pump can be controlled by the controller so that the fuel flows from the auxiliary tank into the main tank, and then the fuel is transported to the main tank through the auxiliary tank.

[0125] For example, there are two auxiliary fuel tanks, including a first auxiliary fuel tank 20a and a second auxiliary fuel tank 20b, which are respectively connected to the main fuel tank 10. The first auxiliary fuel tank 20a is Figure 1 The second auxiliary fuel tank 20b is located at the right side of the fuel tank. Figure 1 The fuel tank is located at the top.

[0126] See also Fig.10 As shown in the figure, when there are two auxiliary fuel tanks as an example, the slope oil delivery strategy includes:

[0127] Determine whether the liquid level of the main oil tank is lower than a first liquid level; optionally, the first liquid level may be 30% of the full state of the main oil tank.

[0128] If the liquid level of the main tank is higher than the first liquid level, no operation is performed. If the liquid level of the main tank is lower than the first liquid level, it is determined whether the liquid level of the first auxiliary tank is higher than a second liquid level; optionally, the second liquid level may be 30% of the full state of the first auxiliary tank.

[0129] If the liquid level of the first auxiliary fuel tank is higher than the second liquid level, the solenoid valve provided in the main fuel tank and the solenoid valve provided in the first auxiliary fuel tank are opened, and the fuel pump is controlled to rotate in the opposite direction, so as to transfer fuel to the main fuel tank through the first auxiliary fuel tank;

[0130] If the liquid level of the first subsidiary tank is lower than the second liquid level, determine whether the liquid level of the second subsidiary tank is higher than a third liquid level; optionally, the third liquid level may be 15% of the full state of the second subsidiary tank.

[0131] If the liquid level of the second auxiliary fuel tank is lower than the third liquid level, no operation is performed. If the liquid level of the second auxiliary fuel tank is higher than the third liquid level, the solenoid valve provided in the main fuel tank and the solenoid valve provided in the second auxiliary fuel tank are opened to control the fuel pump to rotate in the opposite direction, and fuel is transported to the main fuel tank through the second auxiliary fuel tank;

[0132] During the execution, if the liquid level of the main fuel tank reaches the fourth liquid level, or the liquid level of the second auxiliary fuel tank is lower than the third liquid level, the fuel pump and all solenoid valves are turned off to stop the fuel delivery. Optionally, the fourth liquid level can be the full state of the main fuel tank, that is, 100%.

[0133] In actual application, when the vehicle is on an uphill or downhill road, the controller monitors whether the main tank liquid level is lower than 30% as a start condition. If the main tank liquid level is higher than 30%, no operation is performed; if the main tank liquid level is lower than 30% and the first auxiliary tank liquid level is higher than 30%, the controller opens the solenoid valves located in the main tank and the first auxiliary tank, and then starts the fuel pump to rotate in the opposite direction at high speed, and delivers oil to the main tank through the first auxiliary tank. When the main tank liquid level reaches 100%, the fuel pump and all solenoid valves are closed, and the oil delivery ends.

[0134] If the liquid level in the main fuel tank does not reach 100% and the liquid level in the first auxiliary fuel tank is higher than 30%, the current working state will be maintained to continue to deliver fuel; if the liquid level in the main fuel tank does not reach 100%, the liquid level in the first auxiliary fuel tank is lower than 30%, and the liquid level in the second auxiliary fuel tank is lower than 15%, the fuel pump and all solenoid valves will be closed to end the fuel delivery.

[0135] If the liquid level in the main fuel tank has not reached 100%, the liquid level in the first auxiliary fuel tank is lower than 30%, and the liquid level in the second auxiliary fuel tank is higher than 15%, the solenoid valve in the second auxiliary fuel tank is opened, and the solenoid valve in the first auxiliary fuel tank is closed, switching from the first auxiliary fuel tank to the second auxiliary fuel tank as the main fuel tank.

[0136] If the liquid level in the main fuel tank reaches 100%, the fuel pump and all solenoid valves will be closed to end the fuel delivery; if the liquid level in the main fuel tank does not reach 100% and the liquid level in the second auxiliary fuel tank is higher than 15%, the current working state will be maintained and the fuel delivery will continue; if the liquid level in the main fuel tank does not reach 100% and the liquid level in the second auxiliary fuel tank is lower than 15%, the fuel pump and all solenoid valves will be closed to end the fuel delivery.

[0137] If the liquid level in the main fuel tank is lower than 30%, the liquid level in the first auxiliary fuel tank is lower than 30%, and the liquid level in the second fuel tank is lower than 15%, no operation will be performed; if the liquid level in the main fuel tank is lower than 30%, the liquid level in the first auxiliary fuel tank is lower than 30%, and the liquid level in the second fuel tank is higher than 15%, oil will be directly supplied to the main fuel tank through the second auxiliary fuel tank, and the solenoid valve in the main fuel tank and the solenoid valve in the second auxiliary fuel tank will be opened to start the fuel pump to rotate in the opposite direction at high speed, and oil will be supplied to the main fuel tank through the second auxiliary fuel tank.

[0138] If the liquid level in the main fuel tank reaches 100%, the fuel pump and all solenoid valves will be closed to end the fuel delivery; if the liquid level in the main fuel tank does not reach 100% and the liquid level in the second auxiliary fuel tank is lower than 15%, the fuel pump and all solenoid valves will be closed to end the fuel delivery; if the liquid level in the main fuel tank does not reach 100% and the liquid level in the second auxiliary fuel tank is higher than 15%, the current working state will be maintained and the fuel delivery will continue.

[0139] See also Fig.11 As shown in the figure, when there are two auxiliary fuel tanks as an example, the planar oil delivery strategy includes:

[0140] Determine whether the liquid level of the main oil tank is lower than a fifth liquid level (30); optionally, the fifth liquid level may be 30% of the full state of the main oil tank.

[0141] If the liquid level of the main tank is higher than the fifth liquid level, no operation is performed. If the liquid level of the main tank is lower than the fifth liquid level, it is determined whether the liquid level of the first auxiliary tank is higher than the sixth liquid level; optionally, the sixth liquid level may be 2% of the full state of the first auxiliary tank.

[0142] If the liquid level of the first auxiliary fuel tank is higher than the sixth liquid level, the solenoid valve provided in the main fuel tank and the solenoid valve provided in the first auxiliary fuel tank are opened, the fuel pump is controlled to rotate in the opposite direction, and fuel is transported to the main fuel tank through the first auxiliary fuel tank;

[0143] If the liquid level of the first subsidiary fuel tank is lower than the sixth liquid level, determine whether the liquid level of the second subsidiary fuel tank is higher than the seventh liquid level; optionally, the seventh liquid level may be 2% of the full state of the second subsidiary fuel tank.

[0144] If the liquid level of the second auxiliary fuel tank is lower than the seventh liquid level, no operation is performed. If the liquid level of the second auxiliary fuel tank is higher than the seventh liquid level, the solenoid valve provided in the main fuel tank and the solenoid valve provided in the second auxiliary fuel tank are opened to control the fuel pump to rotate in the opposite direction, and fuel is transported to the main fuel tank through the second auxiliary fuel tank;

[0145] During the execution, if the liquid level of the main fuel tank reaches the eighth liquid level, or the liquid level of the second auxiliary fuel tank is lower than the seventh liquid level, the fuel pump and all solenoid valves are turned off to stop the fuel delivery. Optionally, the eighth liquid level can be the full state of the main fuel tank, that is, 100%.

[0146] In actual application, when the vehicle is on a flat road, the controller monitors whether the main tank liquid level is lower than 30% as a start condition. If the main tank liquid level is higher than 30%, no operation is performed; if the main tank liquid level is lower than 30% and the first auxiliary tank liquid level is higher than 2%, the controller opens the solenoid valves set in the main tank and the first auxiliary tank, and then starts the fuel pump to rotate in the opposite direction at high speed, and delivers oil to the main tank through the first auxiliary tank. When the main tank liquid level reaches 100%, the fuel pump and all solenoid valves are closed, and the oil delivery ends.

[0147] If the liquid level in the main fuel tank does not reach 100% and the liquid level in the first auxiliary fuel tank is higher than 2%, the current working state will be maintained to continue to deliver fuel; if the liquid level in the main fuel tank does not reach 100%, the liquid level in the first auxiliary fuel tank is lower than 2%, and the liquid level in the second auxiliary fuel tank is lower than 2%, the fuel pump and all solenoid valves will be closed to end the fuel delivery.

[0148] If the liquid level in the main fuel tank does not reach 100%, the liquid level in the first auxiliary fuel tank is lower than 2%, and the liquid level in the second auxiliary fuel tank is higher than 2%, the solenoid valve in the second auxiliary fuel tank is opened, and the solenoid valve in the first auxiliary fuel tank is closed, switching from the first auxiliary fuel tank to the second auxiliary fuel tank as the main fuel tank.

[0149] If the liquid level in the main fuel tank reaches 100%, the fuel pump and all solenoid valves will be closed to end the fuel delivery; if the liquid level in the main fuel tank does not reach 100% and the liquid level in the second auxiliary fuel tank is higher than 2%, the current working state will be maintained and the fuel delivery will continue; if the liquid level in the main fuel tank does not reach 100% and the liquid level in the second auxiliary fuel tank is lower than 2%, the fuel pump and all solenoid valves will be closed to end the fuel delivery.

[0150] If the liquid level in the main fuel tank is lower than 30%, the liquid level in the first auxiliary fuel tank is lower than 2%, and the liquid level in the second auxiliary fuel tank is lower than 2%, no operation will be performed; if the liquid level in the main fuel tank is lower than 30%, the liquid level in the first auxiliary fuel tank is lower than 2%, and the liquid level in the upper fuel tank is higher than 2%, the oil will be directly supplied to the main fuel tank through the second auxiliary fuel tank. After opening the solenoid valve in the main fuel tank and the solenoid valve in the second auxiliary fuel tank, the fuel pump will be started to rotate in the opposite direction at high speed, and the oil will be supplied to the main fuel tank through the second auxiliary fuel tank.

[0151] If the liquid level in the main fuel tank reaches 100%, the fuel pump and all solenoid valves will be closed to end the fuel delivery; if the liquid level in the main fuel tank does not reach 100% and the liquid level in the second auxiliary fuel tank is lower than 2%, the fuel pump and all solenoid valves will be closed to end the fuel delivery; if the liquid level in the main fuel tank does not reach 100% and the liquid level in the second auxiliary fuel tank is higher than 2%, the current working state will be maintained and the fuel delivery will continue.

[0152] See also Fig.12 As shown, in some optional embodiments, if the liquid level of the main fuel tank or the auxiliary fuel tank continues to rise, a refueling strategy is executed, including:

[0153] If the liquid level of the main fuel tank continues to rise, it is determined that the vehicle is currently refueling using the main fuel tank, and a first refueling strategy is executed to transfer fuel from the main fuel tank to the auxiliary fuel tank;

[0154] If the liquid level of the auxiliary fuel tank continues to rise, it is determined that the vehicle is currently using the auxiliary fuel tank for refueling, and a second refueling strategy is executed to transfer oil to the main fuel tank through the auxiliary fuel tank.

[0155] In actual applications, the controller monitors the signal of the main tank level gauge and the signal of the auxiliary tank level gauge. When the main tank level continues to rise, it is determined that the vehicle is currently refueling with the main tank and the first refueling strategy is started, which can be understood as the long-range refueling mode.

[0156] When the liquid level in the main fuel tank does not continue to rise, the controller continues to determine whether the current auxiliary fuel tank liquid level gauge signal continues to rise. When the liquid level in the auxiliary fuel tank continues to rise, it is determined that the vehicle is currently using the auxiliary fuel tank for refueling and the second refueling strategy is started, which can be understood as an economical refueling mode; when the controller does not detect that the liquid level in the auxiliary fuel tank continues to rise, the program terminates.

[0157] In some optional embodiments, a first refueling strategy is executed to transfer oil from the main tank to the auxiliary tank, and at most the main tank and the auxiliary tank can be fully filled. The first refueling strategy may include:

[0158] Determine whether the liquid level of the main oil tank is lower than a ninth liquid level; optionally, the ninth liquid level may be 2% of the full state of the main oil tank.

[0159] If the liquid level of the main tank is higher than the ninth liquid level, it is determined whether the liquid level of the auxiliary tank reaches the tenth liquid level; optionally, the tenth liquid level may be 100%.

[0160] If the liquid level of the auxiliary oil tank has not reached the tenth liquid level, it is determined whether the decreasing speed of the liquid level of the main oil tank exceeds a set speed, that is, whether the liquid level of the main oil tank decreases rapidly.

[0161] If the falling speed of the liquid level of the main oil tank does not exceed the set speed, that is, the liquid level of the main oil tank does not drop rapidly, the main oil tank is maintained to transfer oil to the auxiliary oil tank;

[0162] If the falling speed of the liquid level of the main oil tank exceeds the set speed, or the liquid level of the main oil tank is lower than the ninth liquid level, or the liquid level of the auxiliary oil tank reaches the tenth liquid level, the oil delivery is stopped.

[0163] See also Fig.13 As shown, taking two auxiliary fuel tanks as an example, the two auxiliary fuel tanks include a first auxiliary fuel tank and a second auxiliary fuel tank. The first auxiliary fuel tank is Figure 1 The fuel tank is located on the right side of the middle part, and the second auxiliary fuel tank is Figure 1 The execution of the first refueling strategy, transferring oil from the main oil tank to the auxiliary oil tank, comprises:

[0164] When the controller determines that the vehicle is currently in the long-range refueling mode, the controller opens the solenoid valve located in the main fuel tank and the solenoid valve located in the first auxiliary fuel tank, and then starts the fuel pump to run in the forward high speed, at which time the main fuel tank is used to supply fuel to the first auxiliary fuel tank.

[0165] When the controller detects that the main fuel tank liquid level drops to 2%, it determines that the current fuel delivery is greater than the filling amount. The controller shuts off the fuel pump and all solenoid valves, ends the fuel delivery, and prevents the main fuel tank from being sucked empty and causing the fuel pump to inhale air.

[0166] When the controller detects that the main tank level is higher than 2% and the first auxiliary tank level is less than 100%, it continues to monitor whether the main tank level drops rapidly. If the level drops rapidly, it is determined that the current refueling process is interrupted. The controller turns off the fuel pump and then closes all solenoid valves, and the oil delivery process ends. If the main tank level does not drop rapidly, it is determined that the current refueling process is still continuing, and the current working state is maintained.

[0167] When the controller detects that the liquid level in the main fuel tank is higher than 2%, the liquid level in the first auxiliary fuel tank reaches 100%, and the liquid level in the second auxiliary fuel tank reaches 100%, it turns off the fuel pump and then all solenoid valves, and the fuel delivery process ends.

[0168] When the controller detects that the liquid level in the main tank is higher than 2%, the liquid level in the first auxiliary tank reaches 100%, the liquid level in the second auxiliary tank does not reach 100%, and the liquid level in the main tank drops rapidly, it determines that the current refueling is interrupted. At this time, the fuel pump and all solenoid valves are turned off, and the fuel delivery process ends.

[0169] When the controller detects that the liquid level in the main fuel tank is higher than 2%, the liquid level in the first auxiliary fuel tank reaches 100%, the liquid level in the second auxiliary fuel tank does not reach 100%, and the liquid level in the main fuel tank does not drop rapidly, it determines that the refueling process is still continuing at this time, and then the controller opens the solenoid valve in the second auxiliary fuel tank, closes the solenoid valve in the first auxiliary fuel tank, and the fuel pump continues to operate in the current state. In this process, the oil transfer object will be switched from the first auxiliary fuel tank to the second auxiliary fuel tank until the liquid level in the second auxiliary fuel tank reaches 100%, then the fuel pump and all solenoid valves are closed, and the oil transfer process ends.

[0170] In some optional embodiments, a second refueling strategy is executed to transfer oil from the auxiliary fuel tank to the main fuel tank, so that the main fuel tank can be filled up at most, but the auxiliary fuel tank is not filled up, including:

[0171] Determine whether the liquid level of the auxiliary fuel tank is lower than an eleventh liquid level; optionally, the eleventh liquid level may be 2% of the full state of the auxiliary fuel tank.

[0172] If the liquid level of the auxiliary oil tank is higher than the eleventh liquid level, it is determined whether the liquid level of the main oil tank has reached the twelfth liquid level; optionally, the twelfth liquid level may be 100%.

[0173] If the liquid level of the main tank has not reached the twelfth liquid level, determining whether the decreasing speed of the liquid level of the auxiliary tank exceeds a set speed, that is, determining whether the liquid level of the auxiliary tank decreases rapidly;

[0174] If the decreasing speed of the liquid level of the auxiliary oil tank does not exceed the set speed, that is, the liquid level of the auxiliary oil tank does not decrease rapidly, the auxiliary oil tank is maintained to transfer oil to the main oil tank;

[0175] If the descending speed of the liquid level of the auxiliary oil tank exceeds the set speed, or the liquid level of the auxiliary oil tank is lower than the eleventh liquid level, or the liquid level of the main oil tank reaches the twelfth liquid level, the oil delivery is stopped.

[0176] See also Fig.14 As shown, taking two auxiliary fuel tanks as an example, the two auxiliary fuel tanks include a first auxiliary fuel tank and a second auxiliary fuel tank. The first auxiliary fuel tank is Figure 1 The fuel tank is located on the right side of the middle part, and the second auxiliary fuel tank is Figure 1 The execution of the second refueling strategy, transferring oil from the auxiliary oil tank to the main oil tank, comprises:

[0177] When the controller determines that the vehicle is currently in economical refueling mode, the controller opens the solenoid valve located in the main fuel tank and the solenoid valve located in the first auxiliary fuel tank, and then starts the fuel pump to operate in reverse at high speed. At this time, the fuel in the first auxiliary fuel tank is transported to the main fuel tank.

[0178] When the controller detects that the liquid level in the first auxiliary fuel tank is lower than 2%, it determines that the current fuel flow rate is higher than the filling amount. At this time, the controller turns off the fuel pump and all solenoid valves to end the fuel delivery, otherwise it continues to run.

[0179] When the controller detects that the liquid level of the first auxiliary tank is higher than 2% and the liquid level of the main tank reaches 100%, it determines that the current main tank is full. After turning off the fuel pump, the controller closes all the liquid level gauge solenoid valves, and the oil delivery process ends.

[0180] When the controller detects that the current liquid level in the first auxiliary fuel tank is higher than 2%, the liquid level in the main fuel tank has not reached 100%, and the liquid level in the first auxiliary fuel tank drops rapidly, it is judged that the current refueling has stopped, and the first auxiliary fuel tank is still in the state of transferring oil to the main fuel tank; when the controller detects that the liquid level in the first auxiliary fuel tank is lower than 2%, the fuel pump and all solenoid valves are closed, and the oil transfer process ends.

[0181] When the liquid level in the first auxiliary tank does not drop to 2%, the current operation state is maintained and oil is continuously supplied to the main tank. When the controller detects that the liquid level in the first auxiliary tank does not drop rapidly, it determines that the current refueling process is still ongoing and the current operation state is maintained.

[0182] The entire process is to refuel the main fuel tank through the first auxiliary fuel tank, and the second auxiliary fuel tank is not refilled. At most, the main fuel tank and the first auxiliary fuel tank can be filled up, and the second auxiliary fuel tank is not refilled.

[0183] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A fuel control method for a vehicle, the vehicle comprising a main fuel tank and at least one auxiliary fuel tank, characterized in that: The control method comprises: Determine the current operating condition of the vehicle, the operating condition including a running state and a shutdown state; When the vehicle is in operation, a fuel delivery strategy is executed to deliver fuel to the main fuel tank through the auxiliary fuel tank; When the vehicle is in a stopped state, determining the change in the liquid level of the main fuel tank and the auxiliary fuel tank; if the liquid level of the main fuel tank or the auxiliary fuel tank continues to rise, executing a refueling strategy; Wherein, if the liquid level of the main fuel tank or the auxiliary fuel tank continues to rise, executing a refueling strategy includes: if the liquid level of the main fuel tank continues to rise, it is determined that the vehicle is currently refueling with the main fuel tank, and executing a first refueling strategy to transfer fuel from the main fuel tank to the auxiliary fuel tank; The executing of the first refueling strategy to transfer oil from the main oil tank to the auxiliary oil tank includes: determining whether the liquid level of the main oil tank is lower than a ninth liquid level; If the liquid level of the main tank is higher than the ninth liquid level, determining whether the liquid level of the auxiliary tank has reached the tenth liquid level; If the liquid level of the auxiliary oil tank has not reached the tenth liquid level, determining whether the decreasing speed of the liquid level of the main oil tank exceeds a set speed; If the decreasing speed of the liquid level of the main oil tank does not exceed the set speed, the main oil tank is maintained to transfer oil to the auxiliary oil tank; If the falling speed of the liquid level of the main oil tank exceeds the set speed, or the liquid level of the main oil tank is lower than the ninth liquid level, or the liquid level of the auxiliary oil tank reaches the tenth liquid level, the oil delivery is stopped.

2. The control method according to claim 1, characterized in that: When the vehicle is in operation, the oil transfer strategy is executed to transfer oil from the auxiliary oil tank to the main oil tank, including: Determine the road condition on which the vehicle is currently traveling, wherein the road condition includes a slope road condition and a flat road condition; When the road condition is a slope road condition, executing the slope oil delivery strategy; When the road condition is a flat road condition, a flat oil delivery strategy is executed.

3. The control method according to claim 2, characterized in that: Determine the road conditions the vehicle is currently traveling on, including: Determining whether the liquid level of the main oil tank or the auxiliary oil tank jumps beyond a set amplitude; If the liquid level of the main fuel tank or the auxiliary fuel tank jumps beyond a set amplitude and tends to be stable, it is determined that the road condition is a slope road condition; If the liquid level of the main fuel tank or the auxiliary fuel tank does not jump, it is determined that the road condition is a flat road condition.

4. The control method according to claim 2, characterized in that: Determine the road conditions the vehicle is currently traveling on, including: Determine whether the slope of the road on which the vehicle is currently traveling exceeds a set slope; When the slope value exceeds the set slope, the road condition is determined to be a slope road condition; When the slope value does not exceed the set slope, it is determined that the road condition is a flat road condition.

5. The control method according to claim 2, characterized in that: The oil delivery strategy includes: Determining whether the liquid level of the main oil tank is lower than a first set liquid level; If the liquid level of the main oil tank is lower than the first set liquid level, determining whether the liquid level of the auxiliary oil tank is higher than the second set liquid level; If the liquid level of the auxiliary oil tank is higher than the second set liquid level, oil is transported to the main oil tank through the auxiliary oil tank.

6. The control method according to claim 5, characterized in that: The auxiliary oil tank includes a first auxiliary oil tank and a second auxiliary oil tank, which are respectively connectable to the main oil tank; the slope oil delivery strategy includes: determining whether the liquid level of the main oil tank is lower than a first liquid level; If the liquid level of the main tank is lower than the first liquid level, determining whether the liquid level of the first auxiliary tank is higher than the second liquid level; If the liquid level of the first auxiliary tank is higher than the second liquid level, oil is transported to the main tank through the first auxiliary tank; If the liquid level of the first auxiliary tank is lower than the second liquid level, determining whether the liquid level of the second auxiliary tank is higher than a third liquid level; If the liquid level of the second auxiliary oil tank is higher than the third liquid level, oil is transported to the main oil tank through the second auxiliary oil tank; If the liquid level of the main oil tank reaches the fourth liquid level, or the liquid level of the second auxiliary oil tank is lower than the third liquid level, the oil delivery is stopped.

7. The control method according to claim 2, characterized in that: The auxiliary oil tank includes a first auxiliary oil tank and a second auxiliary oil tank, which are respectively connectable to the main oil tank; the plane oil delivery strategy includes: determining whether the liquid level of the main oil tank is lower than a fifth liquid level; If the liquid level of the main tank is lower than the fifth liquid level, determining whether the liquid level of the first auxiliary tank is higher than the sixth liquid level; If the liquid level of the first auxiliary oil tank is higher than the sixth liquid level, oil is transported to the main oil tank through the first auxiliary oil tank; If the liquid level of the first auxiliary tank is lower than the sixth liquid level, determining whether the liquid level of the second auxiliary tank is higher than the seventh liquid level; If the liquid level of the second auxiliary oil tank is higher than the seventh liquid level, oil is transported to the main oil tank through the second auxiliary oil tank; If the liquid level of the main oil tank reaches the eighth liquid level, or the liquid level of the second auxiliary oil tank is lower than the seventh liquid level, the oil delivery is stopped.

8. The control method according to claim 1, characterized in that: If the liquid level of the main fuel tank or the auxiliary fuel tank continues to rise, executing the refueling strategy also includes: If the liquid level of the auxiliary fuel tank continues to rise, it is determined that the vehicle is currently using the auxiliary fuel tank for refueling, and a second refueling strategy is executed to transfer oil to the main fuel tank through the auxiliary fuel tank.

9. The control method according to claim 8, characterized in that: The executing the second refueling strategy to transfer oil from the auxiliary oil tank to the main oil tank includes: determining whether the liquid level of the auxiliary oil tank is lower than an eleventh liquid level; If the liquid level of the auxiliary oil tank is higher than the eleventh liquid level, determining whether the liquid level of the main oil tank has reached the twelfth liquid level; If the liquid level of the main oil tank has not reached the twelfth liquid level, determining whether the decreasing speed of the liquid level of the auxiliary oil tank exceeds a set speed; If the decreasing speed of the liquid level of the auxiliary oil tank does not exceed the set speed, the auxiliary oil tank is maintained to transfer oil to the main oil tank; If the descending speed of the liquid level of the auxiliary oil tank exceeds the set speed, or the liquid level of the auxiliary oil tank is lower than the eleventh liquid level, or the liquid level of the main oil tank reaches the twelfth liquid level, the oil delivery is stopped.

10. A fuel control system for a vehicle, characterized in that: The vehicle comprises a main fuel tank and at least one auxiliary fuel tank, and the fuel control system comprises: A first oil delivery component is used to be arranged in a main oil tank, and the first oil delivery component is provided with a first liquid level gauge and a first solenoid valve; the first liquid level gauge is used to measure the liquid level of the main oil tank, and the first solenoid valve is used to open or close the first oil delivery component; At least one second oil delivery assembly, corresponding to the number of the auxiliary oil tanks, used to be arranged in the auxiliary oil tank; the second oil delivery assembly is provided with a second liquid level gauge and a second solenoid valve; the second liquid level gauge is used to measure the liquid level of the auxiliary oil tank, and the second solenoid valve is used to open or close the second oil delivery assembly; A fuel pump, comprising a first fuel pipe interface and a second fuel pipe interface, wherein the first fuel pipe interface is connected to the first fuel delivery component, and the second fuel pipe interface is connected to the second fuel delivery component, and the fuel pump is used to rotate forward or reversely to deliver fuel between the first fuel delivery component and the second fuel delivery component; A controller is electrically connected to the first liquid level gauge, the second liquid level gauge, the first solenoid valve, the second solenoid valve and the fuel pump, and the controller is used to control the opening and closing of the first solenoid valve, the opening and closing of the second solenoid valve and the rotation direction of the fuel pump according to the operating conditions of the vehicle and the measurement results of the first liquid level gauge and the second liquid level gauge, so as to execute the control method as described in any one of claims 1 to 9.

11. The fuel control system according to claim 10, characterized in that: The first oil delivery component comprises: A first joint used to be arranged on the main oil tank, comprising a first oil delivery pipe interface connected to the first oil pipe interface; the first solenoid valve is arranged on the first joint; The first oil pipeline is used to extend into the main oil tank; the first oil pipeline is connected to the first oil pipeline interface; the first liquid level meter is arranged at the portion of the first oil pipeline extending into the main oil tank.

12. The fuel control system according to claim 10, characterized in that: The second oil delivery component comprises: A second joint for being arranged on the auxiliary oil tank, comprising a second oil delivery pipe interface, connected to the second oil pipe interface; the second solenoid valve is arranged on the second joint; The second oil pipeline is used to extend into the auxiliary oil tank; the second oil pipeline is connected to the second oil pipeline interface; the second liquid level gauge is arranged at the portion of the second oil pipeline extending into the auxiliary oil tank.

13. The fuel control system according to claim 10, characterized in that: There are two auxiliary fuel tanks and two second fuel delivery components; the fuel control system also includes: A pipeline tee, comprising a first interface, a second interface and a third interface, wherein the first interface is connected to the second oil pipe interface; A first connecting pipeline, connected between the first oil delivery component and the first oil pipe interface; Two second connecting pipelines, one of the second connecting pipelines is connected between the second interface and one of the second oil delivery components, and the other second connecting pipeline is connected between the third interface and another second oil delivery component.

14. The fuel control system according to claim 10, characterized in that: It also includes a slope sensor for measuring the state of the road surface on which the vehicle is currently traveling; the slope sensor is electrically connected to the controller, and the controller is also used to determine the working condition of the vehicle based on the measurement result of the slope sensor.

15. A vehicle, characterized in that: It comprises a main fuel tank, at least one auxiliary fuel tank and a fuel control system as claimed in any one of claims 10 to 14; the first fuel delivery component is arranged in the main fuel tank, and the second fuel delivery component is arranged in the auxiliary fuel tank.

16. The vehicle according to claim 15, characterized in that There are two auxiliary oil tanks, two second oil delivery assemblies, and the two second oil delivery assemblies are respectively arranged on the two auxiliary oil tanks; The fuel control system also includes a main bracket, the main fuel tank is arranged on the side of the main bracket, the first auxiliary fuel tank is arranged on the side of the main bracket opposite to the main fuel tank, and the second auxiliary fuel tank is arranged on the top of the main bracket; the fuel pump is arranged on the main bracket, and the controller is integrated with the fuel pump.

17. The vehicle according to claim 16, characterized in that It also includes an auxiliary bracket, which is arranged on the top of the main bracket, and the second auxiliary oil tank is arranged on the top of the auxiliary bracket.

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