Multi-oil-tank heating system and method

Abstract

The embodiment of the invention provides a multi-oil-tank heating system and method. The system comprises a main oil tank, an integrated auxiliary oil tank, a replenishment oil tank, an engine and a control unit, heaters are arranged at the main liquid level sensor, the auxiliary liquid level sensor, the heatable coarse filter and the heatable fuel pipe; and the heaters, the bidirectional electric pump, the main liquid level sensor and the auxiliary liquid level sensor are connected to a control unit. When a vehicle is powered on, an environment temperature sensor in the control unit detects the environment temperature, and when the environment temperature is lower than a preset temperature threshold value, the control unit can control a coarse strainer bottom heater, an auxiliary liquid level sensor heater, a main liquid level sensor heater and a bottom communicating oil pipe heater to start heating; fuel oil in the main fuel tank and the integrated auxiliary fuel tank is heated, normal driving in the extremely cold area can be achieved through 0 # diesel oil, the use cost is reduced, a driver does not need to manually switch the fuel tanks in the extremely cold area, and the operation complexity of the driver under the extremely cold condition is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of automobile fuel tanks, and in particular to a multi-fuel tank heating system and method. Background Art

[0002] In northern my country and the Qinghai-Tibet Plateau, the temperature can drop to below -30°C due to the severe cold and long duration of winter. The viscosity of diesel increases significantly as the ambient temperature decreases. When the temperature is extremely low, the wax components in the diesel will precipitate and crystallize to form a milky white viscous mixture. This mixture greatly reduces the fluidity of diesel, making it difficult for it to flow smoothly in the fuel system, commonly known as wax hanging. When the oil line is blocked, the diesel cannot be effectively supplied to the engine, thus affecting the normal start and operation of the engine.

[0003] In order to solve the problem of engine starting difficulties of heavy trucks in high-cold areas due to waxing. The existing technology usually adopts a double-chamber fuel tank design to divide the fuel tank into two parts, one part is used to store conventional No. 0 diesel, and the other part is used to store No. -35 diesel. Since No. -35 diesel has a lower freezing point, it can maintain fluidity in extremely cold conditions to ensure that the engine can start smoothly. Therefore, when the ambient temperature drops to an extremely low level, the vehicle will switch to the auxiliary fuel tank and use No. -35 diesel to power the engine. Then, the hot water generated by the engine is used to circulate to heat the No. 0 diesel in the main tank so that it can continue to be used after the temperature rises.

[0004] However, with existing technologies, the driver is required to manually switch fuel tanks to ensure that -35 diesel is used to power the engine in extremely cold conditions, thereby increasing the complexity and uncertainty of the operation. In addition, -35 diesel is more expensive than No. 0 diesel and has a high cost of use. Summary of the invention

[0005] The present application provides a multi-tank heating system and method, which are used to solve the problem that the engine can be started and operated normally without using -35 diesel in an extremely cold environment.

[0006] In a first aspect, the present application provides a multi-tank heating system, comprising: a main tank, an integrated auxiliary tank, a supply tank, an engine, and a control unit;

[0007] A main liquid level sensor is arranged in the main oil tank;

[0008] A secondary liquid level sensor is arranged inside the integrated secondary oil tank, and the integrated secondary oil tank comprises: a heatable coarse filter, a two-way electric pump and an integrated secondary oil tank cavity, the two-way electric pump comprises a pump oil suction port, a pump oil discharge port and an oil suction and discharge port, the pump oil suction port is connected to the oil suction and discharge port through a first oil passage, and the oil suction and discharge port is connected to the pump oil discharge port through a second oil passage;

[0009] The engine is provided with an engine cooling system;

[0010] The pump oil suction port is connected to the main tank through the auxiliary tank oil suction pipe, and is used to draw diesel from the main tank. The pump oil discharge port is connected to the engine oil inlet pipeline, and is used to deliver the diesel in the integrated auxiliary tank capacity cavity to the engine through the second oil passage and the engine oil inlet pipeline when the two-way electric pump is reversed. The oil suction and discharge ports are connected to the integrated auxiliary tank capacity cavity, and are used to deliver the diesel sucked by the pump oil suction port to the integrated auxiliary tank capacity cavity through the first oil passage when the two-way electric pump is forward. The integrated auxiliary tank capacity cavity and the engine are connected through the engine oil inlet pipeline and the engine oil return pipeline.

[0011] The replenishment tank and the main tank are connected via a heatable fuel pipe for providing replenishment fuel from the replenishment tank to the main tank;

[0012] The engine cooling system and the supply oil tank are connected via a water inlet pipe and a water return pipe;

[0013] The main liquid level sensor, the auxiliary liquid level sensor, the heatable coarse filter, and the heatable fuel pipe are all provided with heaters. The heater, the bidirectional electric pump, the main liquid level sensor, and the auxiliary liquid level sensor are connected to a control unit, and an ambient temperature sensor is provided in the control unit.

[0014] In a possible embodiment, the integrated auxiliary oil tank 2 also includes: an overflow valve 7, which is arranged on an overflow oil pipe 31 connecting the main oil tank 1 and the integrated auxiliary oil tank cavity 4, and is used to discharge excess diesel in the integrated auxiliary oil tank cavity 4 into the main oil tank 1.

[0015] In a possible embodiment, a first one-way valve 19 is provided on the auxiliary tank oil suction pipe for controlling the suction port to absorb diesel from the main tank 1, and a second one-way valve 20 is provided on the engine 25 oil inlet pipe for controlling the delivery of diesel to the engine 25.

[0016] In a possible implementation, the pump oil suction port 15 and the pump oil discharge port 16 are connected via a third oil passage, and a transition joint 18 is provided on the third oil passage. When the bidirectional electric pump 5 is abnormal, the transition joint 18 can be in an open state to open the third oil passage.

[0017] In a possible embodiment, the heatable fuel pipe 22 is also connected to the oil outlet pipe of the main fuel tank 1 through an auxiliary oil suction pipe, so as to discharge the air in the heatable fuel pipe 22 when the bidirectional electric pump 5 draws diesel from the main fuel tank 1.

[0018] In a possible implementation, a water shut-off valve 41 is provided on the water return pipe. When the vehicle enters a cold area, the water shut-off valve 41 is in an open state. When the water shut-off valve 41 is in an open state, the diesel in the supply tank 3 is heated by the coolant in the engine cooling system 44.

[0019] In a possible implementation, a water discharge port and a water collection cup are provided under the heatable coarse filter 6, the water discharge port is aligned with the water collection cup, and a water level sensor is provided next to the water collection cup.

[0020] In a second aspect, an embodiment of the present application provides a multi-tank heating method, which is applied to the system of the first aspect of the embodiment of the present application, and the method includes:

[0021] The control unit 36 ​​acquires the ambient temperature detected by the ambient temperature sensor when detecting the power-on signal;

[0022] If the ambient temperature is lower than the preset temperature threshold, the control unit 36 ​​controls each of the heaters to heat, and controls the bidirectional electric pump 5 to reversely run for a first preset time, and then starts the engine 25;

[0023] If the ambient temperature is higher than the preset temperature threshold, the control unit 36 ​​controls the heater of the main liquid level sensor 35 and the heater corresponding to the heatable fuel pipe 22 to heat, and controls the bidirectional electric pump 5 to reversely run for a second preset time, and then starts the engine 25, wherein the first preset time is less than the second preset time;

[0024] After the engine 25 is started, the bidirectional electric pump 5 is stopped.

[0025] In a possible implementation, during normal operation of the vehicle, the control unit 36 ​​receives the auxiliary liquid level sent by the auxiliary liquid level sensor 34, and controls the bidirectional electric pump 5 to stop working when the auxiliary liquid level is less than or equal to the first liquid level threshold;

[0026] When the auxiliary liquid level is less than or equal to the first liquid level threshold, the control unit 36 ​​receives the main liquid level sent by the main liquid level sensor 35, and when the main liquid level is greater than or equal to the first liquid level threshold, controls the bidirectional electric pump 5 to run forward;

[0027] When the auxiliary liquid level is greater than a second liquid level threshold, the control unit 36 ​​controls the bidirectional electric pump 5 to stop working, and the second liquid level threshold is greater than the first liquid level threshold.

[0028] In a possible implementation, when the control unit 36 ​​receives the ignition off signal, it obtains the secondary liquid level sent by the secondary liquid level sensor 34, and controls the bidirectional electric pump 5 to rotate forward when the secondary liquid level is less than the first liquid level threshold, and / or controls the bidirectional electric pump 5 to stop working when the secondary liquid level is greater than or equal to the second liquid level threshold.

[0029] The present application provides a multi-tank heating system and method, the structure of which includes a main tank 1, an integrated auxiliary tank 2, a supply tank 3, an engine 25, and a control unit 36; the main tank 1, the integrated auxiliary tank 2, and the supply tank 3 all use No. 0 diesel. When the vehicle is powered on, the ambient temperature sensor in the control unit 36 ​​detects the ambient temperature. When the ambient temperature is lower than the preset temperature threshold, the control unit 36 ​​controls the coarse filter bottom heater 8, the auxiliary liquid level sensor heater 13, the main liquid level sensor heater 10, and the bottom connecting oil pipe heater 37 to start heating, so as to heat the fuel in the main tank 1 and the integrated auxiliary tank 2 to prevent the fuel from agglomerating and waxing, causing the engine to be unable to start. At the same time, the two-way electric pump 5 starts to reverse to actively supply fuel to the engine 25. When the engine is ignited and started, the reversal time of the two-way electric pump 5 is different according to different ambient temperatures, so that the high-temperature coolant circulated through the cooling system of the engine 25 heats the water heating heater 21 through the water inlet pipe 39 and the water outlet pipe 40, so as to achieve the function of preheating the supply tank 3. When the vehicle is operating normally, the main level gauge 9 in the main tank 1 and the auxiliary level gauge 12 in the integrated auxiliary tank 2 continuously monitor the fuel levels in the main tank 1 and the integrated auxiliary tank 2, so that the integrated auxiliary tank always has enough fuel to supply the engine during operation, and the engine is prevented from stalling or performance degradation due to insufficient fuel. Therefore, when driving in extremely cold areas, the control unit can send a control signal to start heating the coarse filter bottom heater 8, the auxiliary level sensor heater 13, the main level sensor heater 10, and the bottom connecting oil pipe heater 37, so as to heat the fuel in the main tank 1 and the integrated auxiliary tank 2. Normal driving in extremely cold areas can be achieved by using No. 0 diesel, which reduces the cost of use, and does not require the driver to manually switch fuel tanks in extremely cold areas, reducing the complexity of the driver's operation under extremely cold conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0031] Figure 1A schematic diagram of the structure of a multi-tank heating system provided in an embodiment of the present application;

[0032] Figure 2 A schematic diagram of the oil path direction when the bidirectional electric pump of the multi-tank heating system provided in the embodiment of the present application rotates forward;

[0033] Figure 3 A schematic diagram of the oil path direction when the bidirectional electric pump of the multi-tank heating system provided in the embodiment of the present application is reversed;

[0034] Figure 4 A schematic diagram of the oil path when a bidirectional electric pump of a multi-tank heating system provided in an embodiment of the present application is damaged;

[0035] Figure 5 A schematic diagram of a flow chart of a first embodiment of a multi-tank heating method provided in an embodiment of the present application;

[0036] Figure 6 A schematic flow chart of a second embodiment of a multi-tank heating method provided in an embodiment of the present application;

[0037] Figure 7 A schematic flow chart of a third embodiment of a multi-tank heating method provided in an embodiment of the present application.

[0038] Reference numerals:

[0039] 1-main fuel tank; 2-integrated auxiliary fuel tank; 3-supply fuel tank; 4-integrated auxiliary fuel tank cavity; 5-bidirectional electric pump; 6-heatable coarse filter; 7-overflow valve; 8-coarse filter bottom heater; 9-main liquid level gauge; 10-main liquid level sensor heater; 11-main liquid level sensor filter; 12-auxiliary liquid level gauge; 13-auxiliary liquid level sensor heater; 14-pump oil discharge port oil circuit; 15-pump oil suction port; 16-pump oil discharge port; 17-pump oil suction and discharge port; 18-transition joint; 19-first one-way valve; 20-second one-way valve; 21-water heating heater; 22-heatable fuel pipe; 23- Main tank oil outlet pipe; 24-coarse filter oil inlet pipe; 25-engine; 26-pump suction port oil circuit; 27-first oil channel; 28-second oil channel; 29-third oil channel; 30-pump suction and discharge port oil circuit; 31-overflow oil pipe; 32-engine oil inlet pipeline; 33-engine oil return pipeline; 34-auxiliary liquid level sensor; 35-main liquid level sensor; 36-control unit; 37-bottom connecting oil pipe heater; 38-auxiliary oil suction pipe; 39-water inlet pipe; 40-water outlet pipe; 41-water circuit stop valve; 42-water outlet pipe joint; 43-water inlet pipe joint; 44-engine cooling system.

[0040] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0042] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0043] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0044] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0045] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0046] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0047] In the prior art, when driving in extremely cold areas, the driver needs to manually switch fuel tanks and use -35 diesel to power the engine. Manually switching fuel tanks increases the complexity and uncertainty of the operation, and -35 diesel is more expensive than No. 0 diesel and has a high cost of use.

[0048] The present application provides a multi-tank heating system and method, the structure of which includes a main tank 1, an integrated auxiliary tank 2, a supply tank 3, an engine 25, and a control unit 36; the main tank 1, the integrated auxiliary tank 2, and the supply tank 3 all use No. 0 diesel. When the vehicle is powered on, the ambient temperature sensor in the control unit 36 ​​detects the ambient temperature. When the ambient temperature is lower than the preset temperature threshold, the control unit 36 ​​controls the coarse filter bottom heater 8, the auxiliary liquid level sensor heater 13, the main liquid level sensor heater 10, and the bottom connecting oil pipe heater 37 to start heating, so as to heat the fuel in the main tank 1 and the integrated auxiliary tank 2 to prevent the fuel from agglomerating and waxing, causing the engine to be unable to start. At the same time, the two-way electric pump 5 starts to reverse to actively supply fuel to the engine 25. When the engine is ignited and started, the reversal time of the two-way electric pump 5 is different according to different ambient temperatures, so that the high-temperature coolant circulated through the engine cooling system 44 heats the water heating heater 21 through the water inlet pipe 39 and the water outlet pipe 40, so as to achieve the function of preheating the supply tank 3. When the vehicle is operating normally, the main level gauge 9 in the main tank 1 and the auxiliary level gauge 12 in the integrated auxiliary tank 2 continuously monitor the fuel levels in the main tank 1 and the integrated auxiliary tank 2, so that the integrated auxiliary tank always has enough fuel to supply the engine during operation, and the engine is prevented from stalling or performance degradation due to insufficient fuel. Therefore, when driving in extremely cold areas, the control unit can send a control signal to start heating the coarse filter bottom heater 8, the auxiliary level sensor heater 13, the main level sensor heater 10, and the bottom connecting oil pipe heater 37, so as to heat the fuel in the main tank 1 and the integrated auxiliary tank 2. Normal driving in extremely cold areas can be achieved by using No. 0 diesel, which reduces the cost of use, and does not require the driver to manually switch fuel tanks in extremely cold areas, reducing the complexity of the driver's operation under extremely cold conditions.

[0049] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0050] Figure 1 A schematic diagram of the structure of a multi-tank heating system provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the multi-tank heating system provided in the embodiment of the present application includes: a main fuel tank 1, an integrated auxiliary fuel tank 2, a supply fuel tank 3, an engine 25, and a control unit 36.

[0051] A main liquid level sensor 35 is arranged in the main oil tank 1 .

[0052] In the embodiment of the present application, a main liquid level sensor 35 is provided in the main fuel tank 1, and the main liquid level sensor 35 is composed of a main liquid level gauge 9, a main liquid level sensor heater 10, and a main liquid level sensor filter 11. Among them, the main liquid level gauge 9 is directly used to measure and display the fuel level in the main fuel tank 1; the main liquid level sensor heater 10 is used to heat the main liquid level sensor 35 in a low temperature environment to prevent the fuel from solidifying or becoming viscous due to the low temperature, which affects the accuracy of the liquid level measurement of the main liquid level sensor 35; the main liquid level sensor filter 11 is used to filter the fuel entering the area of ​​the main liquid level sensor 35 to prevent impurities, particulate matter, etc. in the fuel from entering the main liquid level sensor 35, which affects the measurement accuracy and service life of the main liquid level sensor 35.

[0053] An auxiliary liquid level sensor 34 is arranged inside the integrated auxiliary oil tank 2. The integrated auxiliary oil tank 2 includes: a heatable coarse filter 6, a two-way electric pump 5 and an integrated auxiliary oil tank chamber 4. The two-way electric pump 5 includes a pump oil suction port 15, a pump oil discharge port 16 and an oil suction and discharge port 17. The pump oil suction port 15 is connected to the oil suction and discharge port 17 through a first oil passage 27, and the oil suction and discharge port 17 is connected to the pump oil discharge port 16 through a second oil passage 28.

[0054] In the embodiment of the present application, the integrated auxiliary fuel tank 2 is composed of an integrated auxiliary fuel tank cavity 4, a bidirectional electric pump 5, and a heatable coarse filter 6. Among them, an auxiliary liquid level sensor 34 is arranged in the integrated auxiliary fuel tank cavity 4, and the auxiliary liquid level sensor 34 is composed of an auxiliary liquid level gauge 12 and an auxiliary liquid level sensor heater 13. The auxiliary liquid level gauge 12 is directly used to measure and display the fuel level in the integrated auxiliary fuel tank 2, and the auxiliary liquid level sensor heater 13 is used to heat the auxiliary liquid level sensor 34 in a low temperature environment to prevent the fuel from solidifying or becoming viscous due to the low temperature, thereby affecting the accuracy of the liquid level measurement of the auxiliary liquid level sensor 34.

[0055] Furthermore, the bidirectional electric pump 5 includes a pump oil suction port 15 , a pump oil discharge port 16 and an oil suction and discharge port 17 . The pump oil suction port 15 is connected to the oil suction and discharge port 17 through a first oil passage 27 , and the pump oil discharge port 16 is connected to the oil suction and discharge port 17 through a second oil passage 28 .

[0056] Furthermore, the heatable strainer 6 can be heated by a strainer bottom heater 8 .

[0057] An engine cooling system 44 is provided in the engine 25 .

[0058] In the embodiment of the present application, an engine cooling system 44 is provided in the engine 25, and the engine cooling system 44 is responsible for circulating coolant to absorb and remove the heat generated by the engine 25 during operation, thereby ensuring that the engine 25 operates within a normal operating temperature range.

[0059] Figure 2 This is a schematic diagram of the oil path when the bidirectional electric pump of the multi-tank heating system provided in the embodiment of the present application is rotating forward. Figure 3 Schematic diagram of the oil path direction when the bidirectional electric pump of the multi-tank heating system provided in the embodiment of the present application is reversed. The pump suction port 15 is connected to the main tank 1 through the auxiliary tank suction pipe, and is used to absorb diesel from the main tank 1. The pump discharge port 16 is connected to the engine oil inlet pipeline 32, and is used to deliver the diesel in the integrated auxiliary tank cavity 4 to the engine 25 through the second oil channel 28 and the engine oil inlet pipeline 32 when the bidirectional electric pump 5 is reversed. The suction and discharge port 17 is connected to the integrated auxiliary tank cavity 4, and is used to deliver the diesel sucked by the pump suction port 15 to the integrated auxiliary tank cavity 4 through the first oil channel 27 when the bidirectional electric pump 5 is forward. The integrated auxiliary tank cavity 4 and the engine 25 are connected through the engine oil inlet pipeline 32 and the engine oil return pipeline 33.

[0060] In the embodiment of the present application, the pump suction port 15 is connected to the main fuel tank 1 through the auxiliary fuel tank suction pipe, that is, the pump suction port 15 is connected in sequence to the pump suction port oil circuit 26, the heatable coarse filter 6, the coarse filter oil inlet pipe 24, the first one-way valve 19 and the main fuel tank oil outlet pipe 23 connected to the main fuel tank 1, and the pump suction port 15 draws diesel from the main fuel tank 1 through the auxiliary fuel tank suction pipe.

[0061] Furthermore, the pump discharge port 16 is connected to the engine oil inlet pipeline 32 through the pump discharge port oil path 14, so that when the two-way electric pump 5 is reversed, the suction and discharge port 17 delivers the diesel in the integrated auxiliary tank cavity 4 to the engine 25 through the pump suction and discharge port oil path 30, the second oil passage 28, the pump discharge port oil path 14 and the engine oil inlet pipeline 32. When the two-way electric pump 5 is reversed, the pump suction and discharge port 17 starts to work as a suction port, sucking diesel from the integrated auxiliary tank cavity 4, and the sucked diesel flows along the pump suction and discharge port oil path 30, which is a pipeline connecting the pump suction and discharge port 17 and the second oil passage 28. The diesel continues to flow along the second oil passage 28, which is another pipeline connecting components and is used to guide the diesel to the pump discharge port 16. The diesel eventually reaches the pump discharge port oil passage 14, which is a key part connecting the pump discharge port 16 and the engine oil inlet pipeline 32. The diesel flows along the engine oil inlet pipeline 32 and eventually enters the combustion chamber of the engine 25 or other components that need diesel.

[0062] Furthermore, the oil suction and discharge port 17 is connected to the integrated auxiliary oil tank cavity 4 through the pump suction and discharge port oil passage 30, and is used to deliver the diesel sucked by the pump suction port 15 to the integrated auxiliary oil tank cavity 4 through the first oil passage 27 when the two-way electric pump 5 rotates forward. When the two-way electric pump 5 rotates forward, the pump suction port 15 starts to work and sucks diesel from the main oil tank, and the pump suction port 15 delivers the diesel sucked from the main oil tank to the integrated auxiliary oil tank cavity 4 through the first oil passage 27.

[0063] Furthermore, the integrated auxiliary fuel tank cavity 4 and the engine 25 are connected via an engine fuel inlet pipeline 32 and an engine fuel return pipeline 33. The engine fuel inlet pipeline 32 is used to deliver fuel from the integrated auxiliary fuel tank cavity 4 to the fuel system of the engine 25. The engine fuel return pipeline 33 is used to discharge the incompletely burned fuel, lubricating oil and other impurities in the engine 25 from the engine system and return them to the integrated auxiliary fuel tank cavity 4 or other designated fuel recovery system, which helps to keep the inside of the engine 25 clean and the fuel system operating normally.

[0064] The replenishment tank 3 and the main tank 1 are connected via a heatable fuel pipe 22 for supplying replenishment oil from the replenishment tank 3 to the main tank 1 .

[0065] In the embodiment of the present application, the refueling tank 3 is used to store additional fuel. During the vehicle's fuel consumption process, when the fuel level in the main tank 1 drops to a preset warning line, the refueling tank 3 can provide additional fuel to ensure the continued operation of the vehicle. The refueling tank 3 and the main tank 1 are connected by a heated fuel pipe 22 to ensure that the heated fuel pipe 22 can maintain the fluidity and temperature of the fuel by heating when the vehicle is in a cold environment, thereby ensuring that the refueling tank 3 can normally provide additional fuel to replenish the main tank 1. Optionally, the heated fuel pipe 22 is heated by connecting the oil pipe heater 37 at the bottom.

[0066] The engine cooling system 44 and the supply oil tank 3 are connected via a water inlet pipe 39 and a water outlet pipe 40 .

[0067] In the embodiment of the present application, the engine cooling system 44 and the supply oil tank 3 are connected through the water inlet pipe 39 and the water outlet pipe 40. The water inlet pipe 39 is installed with a water inlet pipe joint 43, and the water outlet pipe joint 42 and the water circuit stop valve 41 are installed on the water outlet pipe 40. The supply oil tank 3 is installed with a water heating heater 21. The structure of the water heating heater 21 is composed of two conduit connection devices and is inserted into the supply oil tank 3. The water heating heater does not have a heating function. The water outlet pipe 40 is connected to the water circuit stop valve 41 through the water outlet pipe joint 42, and the water circuit stop valve is connected to one of the conduit connection devices of the water heating heater 21; the water inlet pipe 39 is connected to the other conduit connection device of the water heating heater 21 through the water inlet pipe joint 43. Therefore, the engine cooling system 44 discharges the coolant that has absorbed heat to the water heating heater 21 through the water outlet pipe 40. Since the water heating heater 21 is inserted into the supply tank 3, the heat emitted by the coolant can be emitted to the supply tank 3 through the water heating heater 21 to heat the diesel in the supply tank 3. After the coolant releases heat and cools down, the coolant returns to the engine cooling system 44 through the water inlet pipe 39, thereby forming a cycle.

[0068] The main liquid level sensor 35, the auxiliary liquid level sensor 34, the heatable coarse filter 6, and the heatable fuel pipe 22 are all provided with heaters. The heater, the bidirectional electric pump 5, the main liquid level sensor 35, and the auxiliary liquid level sensor 34 are connected to the control unit 36, and the control unit 36 ​​is provided with an ambient temperature sensor.

[0069] In the embodiment of the present application, the main liquid level sensor 35 is provided with a main liquid level sensor heater 10, the auxiliary liquid level sensor 34 is provided with an auxiliary liquid level sensor heater 13, the heatable coarse filter 6 is provided with a coarse filter bottom heater 8, and the heatable fuel pipe 22 is provided with a bottom connecting oil pipe heater 37. The main liquid level sensor heater 10, the auxiliary liquid level sensor heater 13, the coarse filter bottom heater 8, the bottom connecting oil pipe heater 37, the two-way electric pump 5, the main liquid level sensor 35, and the auxiliary liquid level sensor 34 are connected to the control unit 36. That is, the control unit can control the switches and operations of the above-mentioned heaters, the two-way electric pump 5, the main liquid level sensor 35, and the auxiliary liquid level sensor 34. An ambient temperature sensor is provided in the control unit 36 ​​for detecting the ambient temperature. Optionally, the control unit 36 ​​can also access other ambient temperature signals to detect the ambient temperature.

[0070] See also Figure 1 In the embodiment of the present application, the integrated auxiliary oil tank 2 also includes: an overflow valve 7, which is arranged on an overflow oil pipe 31 connecting the main oil tank 1 and the integrated auxiliary oil tank cavity 4, and is used to discharge excess diesel in the integrated auxiliary oil tank cavity 4 into the main oil tank 1.

[0071] In the embodiment of the present application, the integrated auxiliary tank 2 is further provided with an overflow valve 7, which is installed on an overflow oil pipe 31, and the overflow oil pipe 31 connects the main tank 1 and the integrated auxiliary tank cavity 4. When the diesel in the integrated auxiliary tank cavity 4 reaches a preset safety upper limit, the overflow valve 7 will automatically open, and the excess diesel will be safely led back to the main tank 1 through the overflow oil pipe 31, thereby avoiding the occurrence of overflow problems.

[0072] See also Figure 1 In the embodiment of the present application, a first one-way valve 19 is provided on the auxiliary tank suction pipe for controlling the suction port to draw diesel from the main tank 1, and a second one-way valve 20 is provided on the engine oil inlet pipeline 32 for controlling the delivery of diesel to the engine 25.

[0073] In the embodiment of the present application, the first one-way valve 19 is installed on the oil suction pipe of the auxiliary tank, and mainly controls the diesel to be sucked from the main tank 1, ensuring that the diesel can only be sucked from the main tank 1 and cannot flow back to the main tank 1. The second one-way valve 20 is installed on the engine oil inlet pipeline 32, and its main function is to ensure that the diesel can be delivered to the engine 25 in a unidirectional and stable manner. The second one-way valve 20 not only helps to prevent the fuel from flowing back, but also maintains the stability of the fuel pressure when the engine 25 is under high load or rapidly accelerated, reducing the performance degradation or failure caused by insufficient fuel supply.

[0074] Figure 4A schematic diagram of the oil path when the bidirectional electric pump of the multi-tank heating system is damaged is provided in an embodiment of the present application. In the embodiment of the present application, the pump oil suction port 15 and the pump oil discharge port 16 are connected by a third oil passage 29. A transition joint 18 is provided on the third oil passage 29. When the bidirectional electric pump 5 is abnormal, the transition joint 18 can be in an open state to open the third oil passage 29.

[0075] In the embodiment of the present application, the pump oil suction port 15 and the pump oil discharge port 16 are connected through the third oil passage 29, and a transition joint 18 is provided on the third oil passage 29. When an abnormality occurs in the bidirectional electric pump 5, the transition joint 18 can be opened manually to open the third oil passage 29 for emergency use. By introducing the design of the third oil passage 29 and the transition joint 18, the system's ability to handle abnormal situations is enhanced, and the overall reliability and safety are improved.

[0076] See also Figure 1 In this embodiment of the present application, the heatable fuel pipe 22 is also connected to the main tank outlet pipe 23 through an auxiliary oil suction pipe 38, which is used to discharge the air in the heatable fuel pipe 22 when the two-way electric pump 5 draws diesel from the main tank 1.

[0077] In the embodiment of the present application, an auxiliary oil suction pipe 38 is connected between the heatable fuel pipe 22 and the main fuel tank outlet pipe 23. The auxiliary oil suction pipe 38 is used to discharge the air in the heatable fuel pipe 22 when the bidirectional electric pump 5 draws diesel from the main fuel tank 1, thereby ensuring the smooth flow of fuel and improving the efficiency and performance of the fuel system.

[0078] See also Figure 1 In the embodiment of the present application, a water shut-off valve 41 is provided on the water outlet pipe 40. When the vehicle enters a cold area, the water shut-off valve 41 is in an open state. When the water shut-off valve 41 is in an open state, the diesel in the supply tank 3 is heated by the coolant in the engine cooling system 44.

[0079] In the embodiment of the present application, when the vehicle enters a cold area, the water shut-off valve 41 provided on the water outlet pipe 40 is manually opened. When the water shut-off valve 41 is in the open state, the engine cooling system 44 transports the coolant that has absorbed heat through the water outlet pipe 40 through the water inlet pipe 39 and the water outlet pipe 40 to the water heating heater 21 in the supply tank 3, thereby heating the diesel in the supply tank 3.

[0080] See also Figure 1 In the embodiment of the present application, a water discharge port and a water accumulation cup are provided under the heatable coarse filter 6, the water discharge port is aligned with the water accumulation cup, and a water level sensor is provided next to the water accumulation cup.

[0081] In the embodiment of the present application, the filter element of the heatable coarse filter 6 is consistent with the commonly used filter element structure to maintain interchangeability. A drain port is provided under the heatable coarse filter 6, and a water collection cup is placed aligned below the drain port. The drain port is used to discharge impurities, sediments or excess water generated during the filtration process. The water collection cup usually has sufficient capacity to temporarily store the discharged water or impurities for subsequent processing or dumping. When the water level sensor monitors in real time that the water level in the water collection cup reaches a preset height, the water level sensor feeds back the water level information to the control unit through an electrical signal, so as to automatically stop the filtration process when the preset water level is reached, or start external equipment such as a drainage pump to discharge the liquid in the water collection cup to a farther collection point, which can effectively avoid liquid leakage and safety hazards caused by overflow of the water collection cup.

[0082] Figure 5 This is a flow chart of a multi-tank heating method embodiment 1 provided in the present application. A multi-tank heating method embodiment 1 is applied to a multi-tank heating system provided above, such as Figure 5 As shown, the method comprises the following steps:

[0083] S501: When the control unit 36 ​​detects a power-on signal, it obtains the ambient temperature detected by the ambient temperature sensor.

[0084] In the embodiment of the present application, an ambient temperature sensor is arranged on the control unit 36. When the control unit 36 ​​detects a power-on signal, the control unit 36 ​​acquires the ambient temperature detected by the ambient temperature sensor.

[0085] S502: If the ambient temperature is lower than the preset temperature threshold, the control unit 36 ​​controls each heater to heat, and controls the bidirectional electric pump 5 to reversely run for a first preset time, and then starts the engine 25.

[0086] In the embodiment of the present application, after the control unit obtains the ambient temperature, it will determine whether the ambient temperature is lower than the preset temperature threshold. If the ambient temperature is lower than the preset temperature threshold, the control unit 36 ​​will control each heater for heating, that is, the control unit 36 ​​will control the coarse filter bottom heater 8 under the heatable coarse filter 6, the auxiliary liquid level sensor heater 13 at the bottom of the auxiliary liquid level sensor 34, the main liquid level sensor heater 10 at the bottom of the main liquid level sensor 35, and the bottom connecting oil pipe heater 37 of the heatable fuel pipe 22 to heat the fuel, so as to heat the fuel in the main fuel tank 1 and the integrated auxiliary fuel tank 2. And after controlling the two-way electric pump 5 to reverse and run for the first preset time, when the two-way electric pump 5 reverses, the second oil channel 28 between the oil suction and discharge port 17 and the pump oil discharge port 16 is connected, and the oil suction and discharge port 17 of the two-way electric pump 5 draws fuel from the auxiliary tank cavity 4 and discharges it through the second oil channel 28 and the pump oil discharge port 16, and then actively supplies oil to the engine 25 through the active oil supply channel. The active oil supply channel is composed of the pump oil discharge port oil circuit 14, the second one-way valve 20 and the engine oil inlet pipeline 32.

[0087] S503: If the ambient temperature is higher than the preset temperature threshold, the control unit 36 ​​controls the heater of the main liquid level sensor 35 and the heater corresponding to the heated fuel pipe 22 to heat up, and controls the bidirectional electric pump 5 to reverse and run for a second preset time, and then starts the engine 25, where the first preset time is less than the second preset time.

[0088] In the embodiment of the present application, if the ambient temperature acquired by the control unit 36 ​​is higher than the preset temperature threshold, the control unit 36 ​​controls the main liquid level sensor heater 10 of the main liquid level sensor 35 to heat, and controls the bottom connecting oil pipe heater 37 of the heatable fuel pipe 22 to heat. At the same time, the bidirectional electric pump 5 is controlled to reversely run for a second preset time, pumping fuel into the engine oil inlet pipeline 32, and then starting the engine 25. Among them, the first preset time is less than the second preset time.

[0089] S504: After the engine 25 is started, the bidirectional electric pump 5 is stopped.

[0090] In the embodiment of the present application, after the engine 25 is started, the bidirectional electric pump 5 is stopped from supplying oil to the engine 25 .

[0091] Figure 6 This is a flow chart of a second embodiment of a multi-tank heating method provided in an embodiment of the present application. The second embodiment of a multi-tank heating method is applied to a multi-tank heating system provided above, such as Figure 5 As shown, the method comprises the following steps:

[0092] S601: During normal operation of the vehicle, the control unit 36 ​​receives the auxiliary liquid level sent by the auxiliary liquid level sensor 34, and controls the bidirectional electric pump 5 to stop working when the auxiliary liquid level is greater than a first liquid level threshold.

[0093] In an embodiment of the present application, during normal operation of the vehicle, the control unit 36 ​​receives the secondary liquid level sent by the secondary liquid level sensor 34. When the control unit 36 ​​determines that the secondary liquid level is greater than or equal to the first liquid level threshold, the control unit 36 ​​controls the bidirectional electric pump 5 to stop working. When the bidirectional electric pump 5 does not work, the fuel enters the fuel supply system of the engine 25 through the water inlet pipe 39, the second one-way valve 20 and the engine oil inlet pipeline 32.

[0094] S602: When the auxiliary liquid level is less than or equal to the first liquid level threshold, the control unit 36 ​​receives the main liquid level sent by the main liquid level sensor 35, and when the main liquid level is greater than or equal to the first liquid level threshold, controls the bidirectional electric pump 5 to run forward.

[0095] In the embodiment of the present application, when the control unit 36 ​​receives data that the auxiliary liquid level is less than or equal to the first liquid level threshold, the control unit 36 ​​receives the main liquid level sent by the main liquid level sensor 35, and determines whether the main liquid level is greater than or equal to the first liquid level threshold. If the main liquid level is greater than or equal to the first liquid level threshold, the control unit 36 ​​controls the bidirectional electric pump 5 to run forward, and the fuel enters the integrated auxiliary tank 2 through the main tank outlet pipe 23 between the main tank 1 and the integrated auxiliary tank 2, the first one-way valve 19, the coarse filter inlet pipe 24, the heatable coarse filter 6, the pump suction port oil circuit 26, the electric pump 5 and the pump suction and discharge port oil circuit 30. The integrated auxiliary tank cavity 4 enters the integrated auxiliary tank 2.

[0096] Since the auxiliary oil suction pipe 38 is connected to the main oil tank outlet pipe 23 of the main oil tank 1 when the two-way electric pump 5 rotates forward, the residual air inside the heatable fuel pipe 22 can be brought out by the suction pressure of the two-way electric pump 5, thereby improving the working efficiency of the heatable fuel pipe 22, thereby achieving the purpose of assisting the main oil tank 1 and the supply tank 3 to balance the oil.

[0097] S603: When the auxiliary liquid level is greater than the second liquid level threshold, the control unit 36 ​​controls the bidirectional electric pump 5 to stop working, and the second liquid level threshold is greater than the first liquid level threshold.

[0098] In the embodiment of the present application, when the fuel flows from the main tank 1 into the integrated auxiliary tank 2, the control unit 36 ​​continuously receives the auxiliary liquid level, and when the auxiliary liquid level is greater than the second liquid level threshold, the control unit 36 ​​controls the bidirectional electric pump 5 to stop working. Among them, the second liquid level threshold is greater than the first liquid level threshold. In short, when the liquid level in the integrated auxiliary tank 2 is less than or equal to the first liquid level threshold, the control unit 36 ​​controls the bidirectional electric pump 5 to absorb fuel from the main tank 1 into the integrated auxiliary tank 2, and when the auxiliary liquid level in the integrated auxiliary tank 2 is greater than the second liquid level threshold, the control unit 36 ​​controls the bidirectional electric pump 5 to stop working. In addition, when the main liquid level in the main tank 1 is lower than the preset liquid level threshold, an alarm is issued through the instrument panel to remind the user to refuel.

[0099] Figure 7 Schematic diagram of a flow chart of a third embodiment of a multi-tank heating method provided in an embodiment of the present application, wherein the third embodiment of a multi-tank heating method is applied to a multi-tank heating system provided above, such as Figure 7 As shown, the method comprises the following steps:

[0100] S701: When receiving the ignition off signal, the control unit 36 ​​obtains the auxiliary liquid level sent by the auxiliary liquid level sensor 34, and controls the bidirectional electric pump 5 to rotate forward when the auxiliary liquid level is less than the first liquid level threshold, and / or controls the bidirectional electric pump 5 to stop working when the auxiliary liquid level is greater than or equal to the second liquid level threshold.

[0101] In the embodiment of the present application, when the control unit 36 ​​receives the flameout signal, the control unit 36 ​​obtains the auxiliary liquid level sent by the auxiliary liquid level sensor 34. When the control unit 36 ​​determines that the auxiliary liquid level is less than the first liquid level threshold, the control unit 36 ​​controls the bidirectional electric pump 5 to rotate forward, and the pump suction port 15 draws fuel from the main tank 1 and transmits it to the integrated auxiliary tank cavity 4 through the suction and discharge port 17. When the control unit 36 ​​continuously detects that the auxiliary liquid level sent by the auxiliary liquid level sensor 34 is greater than or equal to the second liquid level threshold, the control unit 36 ​​controls the bidirectional electric pump 5 to stop working. This ensures that when the engine 25 is started next time, the fuel in the auxiliary tank cavity 4 can meet the normal operation of the engine 25 for more than the preset time.

[0102] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-tank heating system, characterized in that: include: Main fuel tank 1, integrated auxiliary fuel tank 2, supply fuel tank 3, engine 25, control unit 36; A main liquid level sensor 35 is provided in the main oil tank 1; The integrated auxiliary oil tank 2 is provided with an auxiliary liquid level sensor 34. The integrated auxiliary oil tank 2 includes: a heatable coarse filter 6, a two-way electric pump 5 and an integrated auxiliary oil tank chamber 4. The two-way electric pump 5 includes a pump oil suction port 15, a pump oil discharge port 16 and an oil suction and discharge port 17. The pump oil suction port 15 is connected to the oil suction and discharge port 17 through a first oil passage 27, and the oil suction and discharge port 17 is connected to the pump oil discharge port 16 through a second oil passage 28. The engine 25 is provided with an engine cooling system 44; The pump oil suction port 15 is connected to the main tank 1 through the auxiliary tank oil suction pipe, and is used to absorb diesel from the main tank 1. The pump oil discharge port 16 is connected to the engine oil inlet pipeline 32, and is used to deliver the diesel in the integrated auxiliary tank cavity 4 to the engine 25 through the second oil passage 28 and the engine oil inlet pipeline 32 when the two-way electric pump 5 is reversed. The oil suction and discharge port 17 is connected to the integrated auxiliary tank cavity 4, and is used to deliver the diesel sucked by the pump oil suction port 15 to the integrated auxiliary tank cavity 4 through the first oil passage 27 when the two-way electric pump 5 is forward. The integrated auxiliary tank cavity 4 and the engine 25 are connected through the engine oil inlet pipeline 32 and the engine oil return pipeline 33. The replenishment tank 3 and the main tank 1 are connected via a heatable fuel pipe 22 for supplying replenishment oil from the replenishment tank 3 to the main tank 1; The engine cooling system 44 and the supply oil tank 3 are connected via a water inlet pipe 39 and a water outlet pipe 40; The main liquid level sensor 35, the auxiliary liquid level sensor 34, the heatable coarse filter 6, and the heatable fuel pipe 22 are all provided with heaters. The heater, the bidirectional electric pump 5, the main liquid level sensor 35, and the auxiliary liquid level sensor 34 are connected to a control unit 36, and an ambient temperature sensor is provided in the control unit 36.

2. The system according to claim 1, characterized in that The integrated auxiliary oil tank 2 further comprises: an overflow valve 7 , which is arranged on an overflow oil pipe 31 connecting the main oil tank 1 and the integrated auxiliary oil tank cavity 4 , and is used to discharge excess diesel in the integrated auxiliary oil tank cavity 4 into the main oil tank 1 .

3. The system according to claim 2, characterized in that A first one-way valve 19 is provided on the auxiliary tank oil suction pipe for controlling the oil suction port to absorb diesel from the main tank 1 , and a second one-way valve 20 is provided on the engine 25 oil inlet pipe for controlling the delivery of diesel to the engine 25 .

4. The system according to claim 2, characterized in that The pump oil suction port 15 and the pump oil discharge port 16 are connected via a third oil passage, and a transition joint 18 is provided on the third oil passage. When the bidirectional electric pump 5 is abnormal, the transition joint 18 can be in an open state to open the third oil passage.

5. The system according to claim 1, characterized in that The heatable fuel pipe 22 is also connected to the oil outlet pipe of the main fuel tank 1 through an auxiliary oil suction pipe, so as to discharge the air in the heatable fuel pipe 22 when the bidirectional electric pump 5 draws diesel from the main fuel tank 1 .

6. The system according to claim 1, characterized in that A water shut-off valve 41 is provided on the water outlet pipe 40. When the vehicle enters a cold area, the water shut-off valve 41 is in an open state. When the water shut-off valve 41 is in an open state, the diesel in the supply tank 3 is heated by the coolant in the engine cooling system 44.

7. The system according to any one of claims 1 to 6, characterized in that A water discharge port and a water accumulation cup are arranged under the heatable coarse filter 6, the water discharge port is aligned with the water accumulation cup, and a water level sensor is arranged beside the water accumulation cup.

8. A multi-tank heating method, characterized in that: Applied to the system of claim 1, the method comprises: The control unit 36 ​​acquires the ambient temperature detected by the ambient temperature sensor when detecting the power-on signal; If the ambient temperature is lower than the preset temperature threshold, the control unit 36 ​​controls each of the heaters to heat, and controls the bidirectional electric pump 5 to reversely run for a first preset time, and then starts the engine 25; If the ambient temperature is higher than the preset temperature threshold, the control unit 36 ​​controls the heater of the main liquid level sensor 35 and the heater corresponding to the heatable fuel pipe 22 to heat, and controls the bidirectional electric pump 5 to reversely run for a second preset time, and then starts the engine 25, wherein the first preset time is less than the second preset time; After the engine 25 is started, the bidirectional electric pump 5 is stopped.

9. The method according to claim 8, characterized in that The method further comprises: During normal operation of the vehicle, the control unit 36 ​​receives the auxiliary liquid level sent by the auxiliary liquid level sensor 34, and controls the bidirectional electric pump 5 to stop working when the auxiliary liquid level is greater than the first liquid level threshold; When the auxiliary liquid level is less than or equal to the first liquid level threshold, the control unit 36 ​​receives the main liquid level sent by the main liquid level sensor 35, and when the main liquid level is greater than or equal to the first liquid level threshold, controls the bidirectional electric pump 5 to run forward; When the auxiliary liquid level is greater than a second liquid level threshold, the control unit 36 ​​controls the bidirectional electric pump 5 to stop working, and the second liquid level threshold is greater than the first liquid level threshold.

10. The method according to claim 8 or 9, characterized in that: Also includes: When receiving the ignition off signal, the control unit 36 ​​obtains the auxiliary liquid level sent by the auxiliary liquid level sensor 34, and controls the bidirectional electric pump 5 to rotate forward when the auxiliary liquid level is less than the first liquid level threshold, and / or controls the bidirectional electric pump 5 to stop working when the auxiliary liquid level is greater than or equal to the second liquid level threshold.

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