Fuel system, fuel supply method, engine, fuel

Abstract

This invention relates to fuel systems, fuel supply methods, engines, fuels, computer-readable storage media, and computer program products. The fuel system includes a liquid fuel storage assembly comprising a liquid fuel storage container and a first fuel line connected to the storage container; and a nanobubble dispersion fuel preparation assembly comprising a nanobubble dispersion fuel preparation section, a second fuel line, a third fuel line, a fourth fuel line, and a nanobubble dispersion fuel storage container. The second fuel line is connected to the first fuel line for supplying liquid fuel to the fuel preparation section. The third fuel line is used to supply gaseous fuel to the fuel preparation section. The fourth fuel line is connected to the output end of the fuel preparation section for supplying the nanobubble dispersion fuel to the downstream nanobubble dispersion fuel storage container and / or a high-pressure fuel supply assembly.

Description

Technical Field

[0001] This invention relates to fuel systems, fuel supply methods, engines, fuels, computer-readable storage media, and computer program products. Background Technology

[0002] Green fuel efficiency technologies, represented by ammonia, methanol, and hydrogen, are crucial for achieving the "dual carbon" goal. Currently, the industrialization of hydrogen fuel cell engines lags behind, while ammonia and methanol engines have a more promising market prospect. However, engines using ammonia or methanol as a single fuel suffer from problems such as ignition and combustion difficulties and low combustion rates, resulting in low power and fuel economy. Therefore, the current development path for ammonia and methanol engines mainly focuses on dual-fuel modes combined with diesel, especially in high-power engines.

[0003] Direct injection combustion of liquid ammonia and methanol is limited by the chemical reactivity of the fuel, making ignition difficult and flame propagation slow. It requires a large amount of diesel fuel to participate in combustion. This increases the complexity of the fuel system and raises costs. Furthermore, the use of a large amount of diesel fuel does not fully realize the fuel's significant advantages in reducing carbon emissions.

[0004] Therefore, there is a need in the art for a fuel system, a fuel supply method, an engine, a fuel, a computer-readable storage medium, and a computer program product to solve at least one of the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a fuel system.

[0006] Another object of the present invention is to provide an engine.

[0007] Another object of the present invention is to provide a fuel supply method.

[0008] Another object of the present invention is to provide a computer-readable storage medium.

[0009] Another object of the present invention is to provide a computer program product.

[0010] Another object of the present invention is to provide a fuel.

[0011] A fuel system according to one aspect of this application includes: a liquid fuel storage assembly, including a liquid fuel storage container and a first fuel line connected to the storage container; a nanobubble dispersion fuel preparation assembly, including a nanobubble dispersion fuel preparation section, a second fuel line, a third fuel line, a fourth fuel line, and a nanobubble dispersion fuel storage container, wherein the second fuel line is connected to the first fuel line and is used to supply liquid fuel to the fuel preparation section, the third fuel line is used to supply gaseous fuel to the fuel preparation section, and the fourth fuel line is connected to the output end of the fuel preparation section and is used to supply the nanobubble dispersion fuel to the downstream nanobubble dispersion fuel storage container and / or a high-pressure fuel supply assembly; and a high-pressure fuel supply assembly, including a low-pressure line, a high-pressure line, a booster pump, and a common rail system, wherein the low-pressure line is connected to the fourth fuel line and is connected to the input end of the booster pump, the output end of the booster pump is connected to the high-pressure line, the high-pressure line is connected to the common rail system, and the common rail system provides high-pressure nanobubble dispersion fuel to a fuel injection assembly.

[0012] In one or more embodiments of the fuel system, the liquid fuel storage assembly further includes a pressure stabilizing module and a fuel parameter detection sensor, the pressure stabilizing module being disposed at the outlet of the liquid fuel storage container; the number of fuel parameter detection sensors is multiple, and they are disposed at least in the liquid fuel storage container and the first fuel pipeline.

[0013] In one or more embodiments of the fuel system, the nanobubble dispersion fuel preparation assembly further includes a gaseous fuel preparation unit. The input end of the gaseous fuel preparation unit is connected to the first fuel pipeline or the second fuel pipeline, and the output end is connected to at least the third fuel pipeline. The gaseous fuel is obtained by inputting liquid fuel from the liquid fuel storage assembly to the gaseous fuel preparation unit, and is output to the nanobubble dispersion fuel preparation unit through the third fuel pipeline.

[0014] In one or more embodiments of the fuel system, the liquid fuel is liquid ammonia, the gaseous fuel is hydrogen, and all the gaseous fuel of the fuel system is provided by the gaseous fuel preparation unit.

[0015] In one or more embodiments of the fuel system, the nanobubble dispersion fuel preparation assembly further includes a gaseous fuel supply unit, the output end of which is connected to the third fuel pipeline, and the third fuel pipeline directly outputs the gaseous fuel to the nanobubble dispersion fuel preparation unit.

[0016] An engine according to a second aspect of this application includes a fuel system as described in the first aspect and a fuel injection assembly, wherein the common rail system provides high-pressure nanobubble dispersion fuel to the fuel injection assembly, and the fuel injection assembly injects the nanobubble dispersion fuel into the combustion chamber of the engine.

[0017] In one or more embodiments of the engine, a first portion of the liquid fuel is cracked to generate the gaseous fuel, and a second portion is a liquid fuel as a nanobubble dispersion system fuel, wherein the first portion is 3% wt.-15% wt. and the second portion is 85% wt.-97% wt.

[0018] According to a fuel supply method based on a third aspect of this application, applied to an engine as described in the second aspect, the supply method includes: for a single execution cycle,

[0019] Obtain the current fuel level, pressure, and temperature in the fuel storage container of the nanobubble dispersion system;

[0020] Obtain engine operating conditions;

[0021] Obtain the output flow rate of the fuel preparation section for the nanobubble dispersion system;

[0022] The total mass of fuel in the storage container is calculated based on the current fuel level, pressure, and temperature obtained from the nanobubble dispersion system fuel storage container. The mass flow rate of the target bubble mass percentage output from the previous execution cycle, the output flow rate of the nanobubble dispersion system fuel preparation unit, and the total mass of fuel in the nanobubble dispersion system fuel storage container are then used to calculate the current bubble mass percentage within the storage container. The calculation formula is as follows:

[0023] y=(q*y'Δt+(M-qΔt)*y1) / M

[0024] Where y is the current proportion of fuel bubble mass in the storage container, y1 and y' are the proportions of fuel bubble mass in the storage container and the output target in the previous execution cycle, respectively, and M is the current total fuel mass in the storage container. It is assumed that M remains constant during the execution cycle time interval Δt, which is achieved by closed-loop control of fuel level, ignoring small changes in temperature, pressure and bubble ratio.

[0025] By comparing the current bubble mass ratio in the fuel storage container of the nanobubble dispersion system with the target mass ratio, it is determined whether the absolute value error between the two is less than 1%. If so, the execution cycle ends and the next execution cycle begins. If not, a new target bubble mass ratio y' is output, and y' increases or decreases according to a certain slope based on its relationship with y1.

[0026] According to a fourth aspect of this application, the fuel is a nanobubble dispersion fuel, the fuel comprising a liquid fuel and a gaseous fuel, wherein the gaseous fuel is in a concentration of 10... 2 Bubbles at the nm scale are uniformly dispersed in the liquid fuel, which is either liquid ammonia or methanol, and the gaseous fuel is hydrogen.

[0027] According to a fifth aspect of this application, a computer-readable storage medium has a computer program thereon that is executed by a processor to implement computer-executable steps in the fuel supply method as described in the third aspect.

[0028] A computer program product according to a sixth aspect of this application includes a computer program that, when executed by a processor, implements computer-executable steps in the fuel supply method as described in the third aspect.

[0029] The beneficial effects of the above embodiments include, but are not limited to, achieving ignition and combustion in a single fuel supply system by reconstructing the chemical activity of fuels such as ammonia and methanol, and by providing a liquid nanobubble dispersion fuel. This is an important technical path to meet users' needs for cost reduction and carbon reduction. It not only simplifies the fuel system and reduces costs, but also eliminates the need for diesel combustion, further leveraging the fuel's advantages in carbon reduction. Attached Figure Description

[0030] The above-described and other features, properties, and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always denote the same features. It should be noted that these drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of protection actually claimed by the present invention, wherein:

[0031] Figure 1 This is a schematic block diagram of an engine according to one embodiment.

[0032] Figure 2 This is a schematic diagram of a liquid fuel storage component of a fuel system according to one embodiment.

[0033] Figure 3 This is a schematic diagram of a nanobubble dispersion fuel preparation component of a fuel system according to one embodiment.

[0034] Figure 4 This is a schematic diagram of a high-pressure fuel supply assembly and a fuel injection assembly of a fuel system according to one embodiment.

[0035] Figure 5 This is a schematic flowchart of a fuel supply method according to one embodiment. Detailed Implementation

[0036] Reference will now be made in detail to various embodiments of the invention, examples of which are shown in the accompanying drawings and described below. Although the invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the invention to those exemplary embodiments. Rather, the invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of the invention as defined by the appended claims.

[0037] In the following description, the terms “inner,” “outer,” “upper,” “lower,” “top,” “bottom,” or other directional terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0038] Furthermore, this application uses specific terms to describe its embodiments. For example, "some embodiments" refers to a particular feature, structure, or characteristic associated with at least one embodiment of this application. Therefore, it should be emphasized and noted that "some embodiments" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics of some embodiments of this application can be appropriately combined.

[0039] This application provides an engine, taking a marine engine as an example, but not as a limitation. For example, it can be applied to other applications, such as heavy vehicles, railway trains, ground generators for power generation, etc. As long as the engine requires a clean fuel combustion scheme, the fuel system, fuel supply method, computer-readable storage medium, and computer program product disclosed in this application can be used.

[0040] refer to Figure 1 As shown, in some embodiments, the engine may include a fuel system and a fuel injection assembly 4 as detailed in the following embodiments, wherein a common rail system of the fuel system provides high-pressure nanobubble dispersion fuel to the fuel injection assembly 4, and the fuel injection assembly 4 injects the nanobubble dispersion fuel into the combustion chamber 5 of the engine.

[0041] refer to Figures 1 to 4 As shown, in some embodiments, the fuel system may include a liquid fuel storage component 1, a nanobubble dispersion fuel preparation component 2, and a high-pressure fuel supply component 3.

[0042] The liquid fuel storage assembly 1 may include a liquid fuel storage container 101 and a first fuel line 103 connected to the storage container 101. In some embodiments, the liquid fuel storage assembly 1 may also include a pressure stabilizing module 102 and a fuel parameter detection sensor 104. The pressure stabilizing module 102 is disposed at the outlet of the liquid fuel storage container 101. There may be multiple fuel parameter detection sensors 104, and they are disposed at least in the liquid fuel storage container 101 and the first fuel line 103. The advantage of this is that installing the pressure stabilizing module 102 ensures that the fuel transportation pressure is within a suitable range, while the first fuel line 103 and the fuel parameter sensor 104 should meet the corresponding standards to ensure the safety of fuel transportation.

[0043] The nanobubble dispersion fuel preparation assembly 2 includes a nanobubble dispersion fuel preparation unit 203, a second fuel pipeline 201, a third fuel pipeline 202, a fourth fuel pipeline 204, and a nanobubble dispersion fuel storage container 205. The second fuel pipeline 201 is connected to the first fuel pipeline 102 and is used to supply liquid fuel to the fuel preparation unit 203. It can be understood that the second fuel pipeline 201 and the first fuel pipeline 102 can be integrally connected or separately connected via connectors. Both the second fuel pipeline 201 and the first fuel pipeline 102 can be double-walled pipes, and fuel parameter monitoring sensors 104 are arranged at each interval according to relevant standards to monitor information such as pressure, temperature, and leakage. The third fuel pipeline 202 is used to supply gaseous fuel to the fuel preparation unit 203. The fourth fuel pipeline 204 is connected to the output end of the fuel preparation unit 203 and is used to supply the nanobubble dispersion fuel to the downstream nanobubble dispersion fuel storage container 205 and / or high-pressure fuel supply assembly 3.

[0044] The nanobubble dispersion fuel preparation unit 203 refers to a system that uses charged bubble repulsion balance technology to add homogeneous, stable nanobubbles of a certain quantity density into a liquid, thereby forming the liquid nanobubble dispersion fuel. A closed-loop fuel level control system can be used between the nanobubble dispersion fuel preparation unit 203 and the nanobubble dispersion fuel storage container 205 to ensure that the fuel level in the nanobubble dispersion fuel storage container 205 is maintained at a certain level, thus guaranteeing fuel supply for the internal combustion engine during continuous operation for a relatively long period. Specific fuel supply methods will be described in detail below. Correspondingly, nanobubble dispersion fuel refers to fuel prepared by generating charged bubbles and then dispersing the gas at approximately 10... 2A nanobubble-based fuel system is formed by uniformly dispersing charged nanobubbles at the nm scale. The electrostatic repulsion between these charged nanobubbles and the liquid pressure achieves mechanical equilibrium, allowing the bubbles to undergo only Brownian motion in the continuous medium. The bubbles are unlikely to aggregate, resulting in a stable dispersion system that can exist for months. This fuel system exhibits physical properties close to those of a liquid and can be transported and supplied through an optimized fuel system. Furthermore, in addition to gas molecules, highly reactive free radicals, such as hydroxyl and methyl groups, can also be dispersed into the continuous medium in the form of nanobubbles, forming nanobubble-based fuel systems.

[0045] The specific materials and structure of the fourth fuel pipeline 204 should take into account the physical properties of the dispersed fuel, and avoid problems such as cavitation and chemical corrosion as much as possible in terms of materials and design.

[0046] Regarding the source of gaseous fuel, in some embodiments, the nanobubble dispersion fuel preparation component 2 may further include a gaseous fuel preparation unit 206. The input end of the gaseous fuel preparation unit is connected to the first fuel pipeline 102 or the second fuel pipeline 201, and the output end is connected to at least the third fuel pipeline 202. By inputting liquid fuel from the liquid fuel storage component to the gaseous fuel preparation unit 206, the gaseous fuel is obtained and output to the nanobubble dispersion fuel preparation unit 203 through the third fuel pipeline 202. Taking liquid ammonia as an example, the gaseous fuel preparation unit 206 can directly use liquid ammonia to produce hydrogen through cracking when liquid ammonia is used as the liquid fuel. That is, the gaseous fuel preparation unit 206 is an ammonia cracking hydrogen production system, realizing the operation of the embodiment under single fuel storage conditions and meeting the requirement of zero carbon fuel source. The ratio of liquid fuel used for pyrolysis and as fuel can be as follows: the first part of liquid ammonia fuel is pyrolyzed to produce hydrogen through the gas fuel preparation unit 206, and the hydrogen enters the nanobubble dispersion system fuel preparation unit 203 through the third fuel pipeline 202. The liquid ammonia flow rate of the pyrolyzed hydrogen is automatically adjusted within a certain range according to the engine operating conditions. Generally speaking, the first part is between 3% and 15% (by mass); while the second part, that is, the other part (i.e., the remaining 85% to 97%, correspondingly) of liquid ammonia enters the nanobubble dispersion system fuel preparation unit 203 through the second fuel pipeline 201.

[0047] In some embodiments, the gaseous fuel can also be supplied by an external gas source. The nanobubble dispersion fuel preparation component 2 further includes a gaseous fuel supply unit 207, the output end of which is connected to the third fuel pipeline 202. The third fuel pipeline 202 directly outputs the gaseous fuel from the gaseous fuel supply unit 207 to the nanobubble dispersion fuel preparation unit 203. For example, the liquid fuel may not be liquid ammonia, and the gaseous fuel may not be hydrogen. Methanol and methane can be used as examples, and methanol-methane nanobubbles can be prepared by LNG liquefaction. In these embodiments, the dispersion fuel preparation component 2 should include a gaseous fuel supply unit 207, i.e., an external gas source. The gaseous fuel preparation unit 206 of the ammonia cracking hydrogen production system or the gaseous fuel supply unit 207 of the external gas source can be controlled by a three-way valve group 208 under different gas source conditions. This makes the fuel system highly versatile and adaptable to various green fuel combinations. Specifically, if hydrogen is not produced from liquid ammonia, and gas is supplied by the gaseous fuel supply unit 207 using an external gas source to prepare nanobubble dispersion fuel, the three-way valve group 208 can be adjusted. Simultaneously, the ammonia cracking hydrogen production system in the gaseous fuel preparation unit 206 is not operational, and all liquid ammonia enters the nanobubble dispersion fuel preparation unit 203 through the second fuel pipeline 201. The nanobubble dispersion fuel preparation unit 203 uses the gaseous and liquid fuels transported by the third fuel pipeline 202 and the second fuel pipeline 201, respectively, as raw materials to prepare nanobubble dispersion fuel.

[0048] The high-pressure fuel supply assembly 3 may include a low-pressure line 301, a high-pressure line 303, a booster pump 302, and a common rail system 304. The low-pressure line 301 is connected to the fourth fuel line 203 and to the input end of the booster pump 302. The output end of the booster pump 302 is connected to the high-pressure line 303. The high-pressure line 303 is connected to the common rail system 304. The common rail system 304 provides high-pressure nanobubble dispersion fuel to the fuel injection assembly 4. The fuel injection assembly 4 may include an injector 401, a fuel inlet line 402, a control oil inlet line 403, and a control oil return line 404.

[0049] The specific fuel preparation and injection process can be as follows: taking liquid ammonia as the liquid fuel and hydrogen as the gaseous fuel, the hydrogen produced by the ammonia cracking hydrogen production system (which serves as the gaseous fuel preparation unit 206) is mixed with liquid ammonia to form a dispersed fuel in the nanobubble dispersed fuel preparation unit 203. This dispersed fuel is then transported through the fourth fuel pipeline 204 to the nanobubble dispersed fuel storage container 205. The ECU 500 (electronic control unit) controls the fuel storage volume and bubble mass ratio within the nanobubble dispersed fuel storage container 205 between the nanobubble dispersed fuel preparation unit 203 and the nanobubble dispersed fuel storage container 205. The nanobubble dispersed fuel passes through the low-pressure pipeline 301, then is pressurized by the booster pump 302. The pressurized fuel then enters the high-pressure common rail 304 through the high-pressure pipeline 303, and finally enters the injector 401 through the fuel inlet pipeline 402 for in-cylinder injection. In addition, the 401 injector may also include a control oil circuit, where control oil enters the control oil supply system 306 from the control oil tank 305 through the control oil pipeline 307, and after being pressurized, enters the injector 401 through the control oil inlet pipeline 403, and then returns to the control oil tank 305 through the control oil return pipeline 404.

[0050] In some embodiments, reference Figure 5 As shown, in the engine, the control method for the nanobubble fuel in the nanobubble dispersion fuel storage container 205 is written into the ECU 500 in the form of code. The ECU 500 can be connected to the nanobubble dispersion fuel preparation system 203 and the nanobubble dispersion fuel storage container 205 via wiring harness 600. The fuel supply method, i.e., the control method, within a single task execution cycle can be the following steps:

[0051] S501: Start

[0052] S502: Read the current fuel level, pressure, and temperature information inside the nanobubble dispersion fuel storage container 205.

[0053] S503: Obtain engine operating condition information

[0054] S504: Read the output flow rate of the nanobubble dispersion fuel preparation system 203

[0055] S505: Look up the table to obtain the target bubble mass percentage

[0056] S506: Calculate the total mass of fuel in the storage container based on the fuel level and pressure information read in S502. Calculate the current bubble mass percentage in the 205 nm bubble dispersion fuel storage container based on the target bubble mass percentage output in the previous execution cycle S508, the mass flow rate in S504, and the total mass of fuel in the storage container.

[0057] The specific calculation formula is as follows:

[0058] y=(q*y'Δt+(M-qΔt)*y1) / M

[0059] Where y is the current percentage of fuel bubble mass in the storage container, y1 and y' are the percentages of fuel bubble mass in the storage container and the output target in the previous execution cycle, respectively, and M is the current total fuel mass in the storage container. It is assumed that M remains constant during the execution cycle time interval Δt, which is achieved by closed-loop control of fuel level, ignoring small changes in temperature, pressure and bubble ratio.

[0060] S507: Compare the current mass ratio of bubbles in the fuel storage container 205 of the nanobubble dispersion system with the target mass ratio, and determine whether the absolute value error between the two is less than 1%. If yes, proceed to step S509; otherwise, proceed to step S508.

[0061] S508: Outputs the new target bubble mass percentage y', where y' increases or decreases with a certain slope according to its relationship with y1.

[0062] S509: End this execution cycle and proceed to the next execution cycle.

[0063] Another aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the computer-executable steps of the fuel supply method described in the above embodiments, as detailed in the above description, which will not be repeated here.

[0064] Additionally, it is understood that the aforementioned computer-readable storage medium may also be in the form of a system, that is, including multiple computer-readable storage sub-media, so as to jointly implement the steps of the fuel supply method described above through multiple computer-readable storage media.

[0065] In addition, another aspect of this application provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the fuel supply method described in the above embodiments that can be executed by a computer. For details, please refer to the description above, which will not be repeated here.

[0066] In addition, another aspect of this application provides a fuel, which is a nanobubble dispersion fuel, comprising liquid fuel and gaseous fuel, wherein the gaseous fuel is in a concentration of 10... 2 Nanobubble dispersions of hydrogen gas are uniformly dispersed in a liquid fuel, which is either liquid ammonia or methanol, and the gaseous fuel is hydrogen. For example, a liquid ammonia-hydrogen nanobubble dispersion fuel system is described below.

[0067] In summary, the beneficial effects of the fuel system, fuel supply method, engine, fuel, computer-readable storage medium, and computer program products described above include, but are not limited to, achieving ignition and combustion under a single fuel supply system by reconstructing the chemical activity of fuels such as ammonia and methanol, and by providing liquid nanobubble dispersion fuels. This represents a crucial technological path to meet users' needs for cost reduction and carbon reduction. It not only simplifies the fuel system and reduces costs but also eliminates the need for diesel combustion, further leveraging the advantages of fuels in carbon reduction. Especially with liquid ammonia-hydrogen nanobubble dispersion fuels, particularly a type of liquid ammonia fuel incorporating hydrogen nanobubbles, the chemical properties are influenced by the properties of liquid and gaseous fuels. Under the technical route described in the specific embodiments of this invention, the liquid ammonia and hydrogen nanobubble dispersion fuels can be pressurized by a liquid pump and directly injected into the cylinder through a high-pressure common rail system and a high-pressure injection system. The injection pressure is ≥500 bar. The mixture formed after the fuel is injected into the cylinder is an ammonia-hydrogen / air mixture. The chemical activity of the fuel is optimized to a certain extent, making it easier to ignite / start combustion. The combustion rate is faster than that of ammonia / air, but the knocking tendency is much lower than that of hydrogen / air mixtures.

[0068] The various illustrative logic modules and circuits described in conjunction with the embodiments disclosed herein may be implemented or performed using a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but in alternatives, it may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0069] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of both. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor such that the processor can read and write information to / from the storage medium. In an alternative, the storage medium may be integrated into the processor. The processor and storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and storage medium may reside as discrete components in the user terminal.

[0070] In one or more exemplary embodiments, the described functionality may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functionality may be stored or transmitted as one or more instructions or code on or via a computer-readable medium. A computer-readable medium includes both computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. A storage medium may be any available medium accessible to a computer. By way of example and not limitation, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and is accessible to a computer. Any connection is also legitimately referred to as a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of a medium. As used in this article, disk and disc include compact discs (CDs), laser discs, optical discs, digital multi-purpose discs (DVDs), floppy disks, and Blu-ray discs. Disks typically reproduce data magnetically, while discs reproduce data optically using lasers. Combinations of these should also be included within the scope of computer-readable media.

[0071] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. A fuel system, characterized in that, include: A liquid fuel storage assembly includes a liquid fuel storage container and a first fuel line connected to the storage container; A nanobubble dispersion fuel preparation assembly includes a nanobubble dispersion fuel preparation unit, a second fuel pipeline, a third fuel pipeline, a fourth fuel pipeline, and a nanobubble dispersion fuel storage container. The second fuel pipeline is connected to the first fuel pipeline and is used to deliver liquid fuel to the fuel preparation unit. The third fuel pipeline is used to deliver gaseous fuel to the fuel preparation unit. The fourth fuel pipeline is connected to the output end of the fuel preparation unit and is used to deliver the nanobubble dispersion fuel to the downstream nanobubble dispersion fuel storage container and / or high-pressure fuel supply assembly. A high-pressure fuel supply assembly includes a low-pressure line, a high-pressure line, a booster pump, and a common rail system. The low-pressure line is connected to the fourth fuel line and the input end of the booster pump is connected to the output end of the booster pump. The high-pressure line is connected to the common rail system, which provides high-pressure nanobubble dispersion fuel to the fuel injection assembly. The nanobubble dispersion fuel preparation assembly further includes a gaseous fuel preparation unit. The input end of the gaseous fuel preparation unit is connected to the first fuel pipeline or the second fuel pipeline, and the output end is connected to at least the third fuel pipeline. The gaseous fuel is obtained by inputting liquid fuel from the liquid fuel storage assembly to the gaseous fuel preparation unit, and is output to the nanobubble dispersion fuel preparation unit through the third fuel pipeline. The liquid fuel is liquid ammonia, and the gaseous fuel is hydrogen. All the gaseous fuel in the fuel system is provided by the gaseous fuel preparation unit. By providing liquid nanobubble dispersion fuel, the ignition and combustion of the single fuel supply system are achieved.

2. The fuel system as claimed in claim 1, characterized in that, The liquid fuel storage assembly also includes a pressure stabilizing module and a fuel parameter detection sensor. The pressure stabilizing module is located at the outlet of the liquid fuel storage container. The number of fuel parameter detection sensors is multiple, and they are located at least in the liquid fuel storage container and the first fuel pipeline.

3. The fuel system as claimed in claim 1, characterized in that, The nanobubble dispersion fuel preparation assembly also includes a gaseous fuel supply unit, the output end of which is connected to the third fuel pipeline, and the third fuel pipeline directly outputs the gaseous fuel to the nanobubble dispersion fuel preparation unit.

4. An engine, characterized in that, The common rail system includes a fuel system as described in any one of claims 1-3, and a fuel injection assembly, wherein the common rail system provides high-pressure nanobubble dispersion fuel to the fuel injection assembly, and the fuel injection assembly injects the nanobubble dispersion fuel into the combustion chamber of the engine.

5. The engine as claimed in claim 4, wherein a first portion of the liquid fuel is cracked to generate the gaseous fuel, and a second portion is a liquid fuel in a nanobubble dispersion system, wherein the first portion is 3% wt.-15% wt. and the second portion is 85% wt.-97% wt.

6. A fuel supply method, characterized in that, For use in an engine, the engine includes a fuel system and a fuel injection assembly. The fuel system includes: a liquid fuel storage assembly, including a liquid fuel storage container and a first fuel line connected to the storage container; a nanobubble dispersion fuel preparation assembly, including a nanobubble dispersion fuel preparation section, a second fuel line, a third fuel line, a fourth fuel line, and a nanobubble dispersion fuel storage container. The second fuel line is connected to the first fuel line for supplying liquid fuel to the fuel preparation section. The third fuel line is used to supply gaseous fuel to the fuel preparation section. The fourth fuel line is connected to the output end of the fuel preparation section for... The method involves supplying the nanobubble dispersion fuel to a downstream nanobubble dispersion fuel storage container and / or a high-pressure fuel supply assembly; the high-pressure fuel supply assembly includes a low-pressure line, a high-pressure line, a booster pump, and a common rail system; the low-pressure line is connected to the fourth fuel line and to the input of the booster pump; the output of the booster pump is connected to the high-pressure line; the high-pressure line is connected to the common rail system; the common rail system provides high-pressure nanobubble dispersion fuel to a fuel injection assembly; the fuel injection assembly injects the nanobubble dispersion fuel into the combustion chamber of the engine; the supply method includes: for a single execution cycle, Obtain the current fuel level, pressure, and temperature in the fuel storage container of the nanobubble dispersion system; Obtain engine operating conditions; Obtain the output flow rate of the fuel preparation section for the nanobubble dispersion system; The total mass of fuel in the storage container is calculated based on the current fuel level, pressure, and temperature obtained from the nanobubble dispersion system fuel storage container. The mass flow rate of the target bubble mass percentage output from the previous execution cycle, the output flow rate of the nanobubble dispersion system fuel preparation unit, and the total mass of fuel in the nanobubble dispersion system fuel storage container are then used to calculate the current bubble mass percentage within the storage container. The calculation formula is as follows: y=(q*y'Δt+(M-qΔt)*y1) / M Where q is the mass flow rate of the output flow of the fuel preparation section of the nanobubble dispersion system, y is the mass percentage of fuel bubbles in the current storage container, y1 and y' are the mass percentage of bubbles in the storage container and the output target bubble mass percentage in the previous execution cycle, respectively, and M is the total mass of fuel in the current storage container. It is assumed that M remains constant during the execution cycle time interval Δt, which is achieved by closed-loop control of fuel level, and small changes in temperature, pressure and bubble ratio are ignored. By comparing the current bubble mass ratio in the fuel storage container of the nanobubble dispersion system with the target mass ratio, it is determined whether the absolute value error between the two is less than 1%. If so, the execution cycle ends and the next execution cycle begins. If not, a new target bubble mass ratio y' is output, and y' increases or decreases according to a certain slope based on its relationship with y1.

7. The fuel supply method as described in claim 6, characterized in that, The first part of the liquid fuel is cracked to generate the gaseous fuel, and the second part is the liquid fuel as a nanobubble dispersion system fuel. The first part is 3% wt.-15% wt. and the second part is 85% wt.-97% wt.

8. The fuel supply method as described in claim 6, characterized in that, The liquid fuel storage assembly also includes a pressure stabilizing module and a fuel parameter detection sensor. The pressure stabilizing module is located at the outlet of the liquid fuel storage container. The number of fuel parameter detection sensors is multiple, and they are located at least in the liquid fuel storage container and the first fuel pipeline.

9. The fuel supply method as described in claim 6, characterized in that, The nanobubble dispersion fuel preparation assembly further includes a gaseous fuel preparation unit. The input end of the gaseous fuel preparation unit is connected to the first fuel pipeline or the second fuel pipeline, and the output end is connected to at least the third fuel pipeline. The gaseous fuel is obtained by inputting liquid fuel from the liquid fuel storage assembly to the gaseous fuel preparation unit, and is output to the nanobubble dispersion fuel preparation unit through the third fuel pipeline.

10. The fuel supply method as described in claim 9, characterized in that, The liquid fuel is liquid ammonia, and the gaseous fuel is hydrogen. All the gaseous fuel in the fuel system is provided by the gaseous fuel preparation unit.

11. The fuel supply method as described in claim 9, characterized in that, The nanobubble dispersion fuel preparation assembly also includes a gaseous fuel supply unit, the output end of which is connected to the third fuel pipeline, and the third fuel pipeline directly outputs the gaseous fuel to the nanobubble dispersion fuel preparation unit.

12. A computer-readable storage medium having a computer program thereon, characterized in that, The program is executed by a processor to implement the steps of the fuel supply method as described in any one of claims 6-11 that can be executed by a computer.

13. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the computer-executable steps of the fuel supply method as described in any one of claims 6-11.

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