A micro hydrogen bubble / diesel fuel preparation and supply device

Abstract

The present invention is applicable to the field of engine fuel pretreatment technology and provides a micro hydrogen bubble / diesel fuel preparation and supply device, comprising: a fuel tank, a controllable oil valve, a diesel filter, a three-way valve, a low-pressure fuel pump, a nanobubble generator, a first hydrogen bubble / diesel fuel storage device, an electronic control unit, a second hydrogen bubble / diesel fuel storage device, a high-pressure fuel pump, a high-pressure fuel rail, a fuel injector, an engine, and a hydrogen supply and hydrogen detection seal. The diesel flow channel between the fuel tank and the high-pressure fuel pump constitutes the low-pressure fuel circuit. The fuel tank outlet is connected to the inlet of the controllable oil valve, the outlet of the controllable oil valve is connected to the inlet of the diesel filter, the outlet of the diesel filter is connected to the first inlet of the three-way valve, and the third outlet of the three-way valve is connected to the inlet of the low-pressure fuel pump. The present invention provides a micro hydrogen bubble / diesel fuel preparation and supply device, and the fuel rail pressure sensor can measure the fuel rail pressure and transmit the signal to the electronic control unit.

Description

Technical Field

[0001] The invention belongs to the technical field of engine fuel pretreatment, and in particular relates to a micro hydrogen bubble / diesel fuel preparation and supply device. Background Art

[0002] Micro-nanobubbles are bubbles with particle sizes in the micrometer and nanometer range. Nanobubbles possess physicochemical properties that differ significantly from those of macrobubbles, such as large surface area, high gas-phase solubility, strong liquid-phase stability, and a high interfacial zeta potential. Currently, nanobubble fluids, with their superior gas-liquid two-phase bubbly flow properties, are gaining increasing attention in water treatment, mineral flotation, crop cultivation, and biomedicine. In the automotive engine sector, research has also demonstrated that the addition of nanobubbles effectively improves engine combustion performance.

[0003] Hydrogen is an environmentally friendly and efficient energy source. Its combustion product is water, causing no environmental pollution. Furthermore, the energy generated by combustion is extremely high, and the resource is permanently renewable. Currently, combustion in pre-mixed hydrogen / diesel engines with hydrogenation has been extensively studied. Diesel auto-ignites to form multiple ignition centers, which ignite the lean pre-mixed gas within the combustion chamber, achieving lean burn. The microscopic properties of nanobubbles offer a novel approach to hydrogen application in internal combustion engines and control of diesel combustion processes.

[0004] To this end, a micro-hydrogen bubble / diesel fuel preparation and supply device developed for diesel engine high-pressure injection and electronically controlled injection technologies improves atomization, enhancing the oil-gas mixing rate and quality. This invention can be applied to existing automotive power systems to prepare and supply micro-hydrogen bubble / diesel fuel, achieving fuel pretreatment. Summary of the Invention

[0005] The purpose of the present invention is to provide a micro hydrogen bubble / diesel fuel preparation and supply device, aiming to overcome the shortcomings of the existing technology, especially the gaps in micro-nano bubble diesel technology.

[0006] Therefore, the main purpose of the present invention is to improve the efficiency of mixed fuel preparation and use a nanobubble generator to generate micro hydrogen bubbles / diesel fuel to improve the combustion and emission characteristics of diesel engines.

[0007] The present invention is achieved by a device for preparing and supplying micro hydrogen bubbles / diesel fuel, comprising:

[0008] Fuel tank, controllable oil valve, diesel filter, three-way valve, low-pressure oil pump, nanobubble generator, hydrogen bubble / diesel fuel storage device 1, electronic control unit, hydrogen bubble / diesel fuel storage device 2, high-pressure oil pump, high-pressure oil rail, fuel injector, engine, and hydrogen supply and hydrogen detection seals;

[0009] The diesel flow channel between the fuel tank and the high-pressure fuel pump is a low-pressure fuel circuit; wherein the fuel tank outlet is connected to the controllable fuel valve inlet, the controllable fuel valve outlet is connected to the diesel filter inlet, the diesel filter outlet is connected to the inlet 1 of the three-way valve, the outlet 3 of the three-way valve is connected to the low-pressure fuel pump inlet, the low-pressure fuel pump outlet is connected to the inlet of the nano-bubble generator, the nano-bubble generator outlet is connected to the first inlet of the hydrogen bubble / diesel fuel storage device, the first outlet of the hydrogen bubble / diesel fuel storage device is connected to the second inlet of the hydrogen bubble / diesel fuel storage device, and the second outlet of the hydrogen bubble / diesel fuel storage device is connected to the high-pressure fuel pump inlet;

[0010] The high-pressure oil pump to the fuel injector is a high-pressure oil circuit; wherein the high-pressure oil pump outlet is connected to the high-pressure oil rail inlet, the high-pressure oil rail outlet is connected to the fuel injector inlet, and the fuel injector is connected to the engine.

[0011] In a further technical solution, the inlet at one end of the nanobubble generator is connected to a low-pressure oil pump, the inlet at the other end is connected to the outlet of a three-way check valve, and the outlet is connected to a hydrogen bubble / diesel fuel storage device;

[0012] The nanobubble generator adopts fluid dynamics cavitation, and utilizes turbulence and Venturi tube principles to generate microbubbles, ensuring that micro hydrogen bubbles / diesel fuel with a concentration that meets the requirements can be cyclically produced within the designed preparation time range of the device. The nanobubble generator method includes but is not limited to using Venturi tube cavitation, and can also be produced by methods such as mechanical cutting and ultrasonic cavitation.

[0013] A further technical solution is that the first hydrogen bubble / diesel fuel storage device is integrated with valves 1, 2, and 3, and is also equipped with a pressure sensor 1, a high liquid level sensor, a bubble concentration sensor, and a low liquid level sensor; the first valve is connected to the second inlet of the three-way valve, the second valve is connected to the inlet of the hydrogen circulation pump, and the third valve is connected to the second hydrogen bubble / diesel fuel storage device;

[0014] The openings of valves 1, 2, and 3 can all be adjusted by an electronic control unit; valve 2 and pressure sensor 1 are both placed on top of a hydrogen bubble / diesel fuel storage device 1, the high liquid level sensor is placed at 80%-90% of the height of the hydrogen bubble / diesel fuel storage device 1, and the bubble concentration sensor is placed at 50% of the height of the hydrogen bubble / diesel fuel storage device 1, which can be an optical fiber microbubble concentration sensor based on nano-gold film or a microbubble concentration sensor based on ultrasonic cavitation;

[0015] In addition, the bubble concentration can also be characterized by measuring the zeta potential or other characteristics of the micro hydrogen bubbles / diesel fuel; the low liquid level sensor is placed at 10%-20% of the height of the hydrogen bubble / diesel fuel storage device 1, and the valve 3 and valve 1 are placed below the low liquid level sensor to facilitate the outflow of diesel; the storage capacity between the two liquid level sensors should be greater than or equal to the total capacity of the hydrogen bubble / diesel fuel storage device 2.

[0016] A further technical solution is that a liquid level sensor is integrated into the second hydrogen bubble / diesel fuel storage device. The inlet at one end of the second hydrogen bubble / diesel fuel storage device is connected to the third valve, and the inlet at the other end is connected to the high-pressure oil pump and the injector oil return port. The capacity of the second hydrogen bubble / diesel fuel storage device meets the oil demand of the engine under various loads such as large, medium and small within a certain period of time. The liquid level sensor adopts a reed switch type. If the liquid level of the second hydrogen bubble / diesel fuel storage device is lower than a preset height, the third valve is opened to supply oil, regardless of whether the bubble concentration and liquid level in the first hydrogen bubble / diesel fuel storage device reach the preset values.

[0017] According to a further technical solution, a second pressure sensor is integrated on the high-pressure fuel rail, and the second pressure sensor transmits the received pressure signal to the electronic control unit for status characterization.

[0018] In a further technical solution, the hydrogen supply and detection seal comprises a three-way check valve, a flow control valve, a pressure reducing valve, a shut-off valve, a hydrogen cylinder, a hydrogen circulation pump, a hydrogen gas alarm, and four valves. The seal is a housing that creates an insulated and sealed environment, primarily preventing hydrogen from leaking. An internal hydrogen pipeline connects these components, and the seal is removable from the pipeline. In terms of gas line connection, a shut-off valve, a pressure reducing valve, and a flow control valve are sequentially connected between the hydrogen cylinder and the three-way check valve. The hydrogen supply and hydrogen detection seals can prevent hydrogen leaked in the chamber from escaping. The three-way check valve can ensure that hydrogen does not flow back. The inlet 1 of the three-way check valve is connected to the flow control valve, the inlet 2 of the three-way check valve is connected to the hydrogen circulation pump, and the outlet 3 is connected to the nanobubble generator. The hydrogen circulation pump is connected to valve 2, and its speed can be controlled by an electronic control unit. Different speeds can be preset according to different engine operating conditions to ensure that the hydrogen circulation volume is close to the amount of hydrogen escaping from the hydrogen bubble / diesel fuel storage device 1. Due to the relatively low density of hydrogen, the hydrogen gas alarm is installed above the hydrogen supply and hydrogen detection seals, and the valve 4 is installed above the outside of the hydrogen supply and hydrogen detection seals to facilitate hydrogen discharge after hydrogen leakage.

[0019] The diesel extracted by the low-pressure oil pump and the hydrogen supplied by the hydrogen cylinder form a certain concentration of micro hydrogen bubbles / diesel fuel in the nano bubble generator. After circulating in the hydrogen bubble / diesel fuel storage device 1 to reach the concentration requirement, it enters the hydrogen bubble / diesel fuel storage device 2 for storage. The prepared micro hydrogen bubble / diesel fuel is generated into sufficient and stable pressure in the common rail pipe by the high-pressure oil pump and is injected into the cylinder through the injector for atomized combustion.

[0020] The hydrogen cylinder is used to store hydrogen and is responsible for delivering hydrogen to the nano bubble generator.

[0021] The valve opening and opening and closing states of the shut-off valve, pressure reducing valve and flow control valve can be controlled by an electronic control unit, or physical valves can be used. Different valve opening values are preset to adapt to engine operation under different loads.

[0022] The hydrogen gas alarm is mounted above the sealed body. Once hydrogen levels are detected, it immediately sounds an alarm and transmits the alarm information back to the electronic control unit, which then sends the alarm information to the control room. Simultaneously, the electronic control unit issues a command to close the shutoff valve, cutting off the hydrogen supply, and shutting down the hydrogen circulation pump, valve 2, and the low-pressure oil pump.

[0023] The hydrogen circulation pump is used to transport the hydrogen separated from the hydrogen bubble / diesel fuel storage device to the three-way check valve. After mixing with the hydrogen delivered by the hydrogen cylinder, the hydrogen enters the nanobubble generator. The circulation speed of the hydrogen circulation pump is similar to the hydrogen escape rate from the hydrogen bubble / diesel fuel storage device.

[0024] The valve 4 is in a normally closed state and is used to discharge hydrogen when and only when hydrogen leakage occurs in the hydrogen supply and hydrogen detection sealing bodies.

[0025] The first hydrogen bubble / diesel fuel storage device integrates valves 1, 2, 3, a high liquid level sensor, a pressure sensor, a low liquid level sensor, and a bubble concentration sensor. Valve 1 is connected to inlet 2 of the three-way valve. Its opening and closing are controlled by an electronic control unit and are preset to either fully open or closed. It primarily controls the production cycle of micro hydrogen bubbles / diesel fuel.

[0026] The pressure sensor is responsible for real-time measurement of the gas pressure in the hydrogen bubble / diesel fuel storage device 1. The opening of the valve 2 can be controlled by the electronic control unit and is preset to two states: fully open and closed, and is mainly responsible for hydrogen circulation.

[0027] The valve three is connected to the hydrogen bubble / diesel fuel storage device two. The opening of the valve three is controlled by the electronic control unit and is preset to two states: fully open and closed. The valve three is responsible for the transportation of micro hydrogen bubbles / diesel fuel from the hydrogen bubble / diesel fuel storage device one to the hydrogen bubble / diesel fuel storage device two.

[0028] The bubble concentration sensor may be an optical fiber microbubble concentration sensor based on a nano-gold film or a microbubble concentration sensor based on ultrasonic cavitation.

[0029] The low and high liquid level sensors are normally closed and open reed switches, respectively. When the liquid level in hydrogen bubble / diesel fuel storage device 1 exceeds a preset maximum level, the controllable oil valve closes, halting diesel extraction from the tank. When the liquid level falls below a preset minimum level, valve 1 opens and valve 3 closes, continuing the preparation cycle.

[0030] The high-pressure fuel pump outlet is connected to the high-pressure fuel rail, and the oil return port is connected to the oil return of the injector, and the oil is returned to the second hydrogen bubble / diesel fuel storage device. The high-pressure fuel rail outlet is connected to the injector, which is integrated with a rail pressure sensor. The high-pressure fuel pump inputs high-pressure hydrogen bubble / diesel fuel;

[0031] The input end of the electronic control unit is respectively connected to the bubble concentration sensor, the low liquid level sensor, the high liquid level sensor, the first pressure sensor, the hydrogen supply and hydrogen detection seal, the liquid level sensor, and the second pressure sensor. The output end of the electronic control unit is respectively connected to the high-pressure oil pump, the injector, the first hydrogen bubble / diesel fuel storage device, the controllable oil valve, the hydrogen supply and hydrogen detection seal, and the low-pressure oil pump.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. This invention provides a micro-hydrogen bubble / diesel fuel preparation and supply device. A rail pressure sensor measures rail pressure and transmits the signal to an electronic control unit. The high-pressure rail maintains a stable rail pressure for the hydrogen bubble / diesel fuel. The electronic control unit flexibly controls the injection pressure, achieving stable and precise regulation of the high-pressure hydrogen-rich diesel fuel and improving atomization quality.

[0034] 2. The present invention provides a micro-hydrogen bubble / diesel fuel preparation and supply device. Before diesel enters the high-pressure fuel rail and is injected by the injector, a micro-nano bubble generator is connected in series to the oil pipeline. This allows diesel and hydrogen to be premixed in the nanobubble generator to form micro-hydrogen bubble / diesel fuel. This diesel fuel, containing a large number of micro-hydrogen bubbles, not only improves atomization quality during spraying, but also significantly enhances the thermal efficiency of diesel engines during combustion.

[0035] 3. The present invention provides a device for preparing and supplying micro-hydrogen bubbles / diesel fuel. The ignition delay period of the prepared micro-hydrogen bubbles / diesel fuel is shortened, making the engine operation smoother. The presence of trace hydrogen in the micro-hydrogen bubbles / diesel fuel can improve the combustion process, reduce fuel consumption, and improve fuel economy.

[0036] 4. This technical solution uses an electronic control unit and a hydrogen supply and hydrogen detection seal to perform hydrogen circulation and hydrogen leak detection, ensuring a stable supply of hydrogen and timely detection and alarm of leaked hydrogen during the preparation of the mixed fuel; the coordinated use of the hydrogen bubble / diesel fuel storage device 1 and the hydrogen bubble / diesel fuel storage device 2 can ensure sufficient supply of micro hydrogen bubbles / diesel fuel that meets the concentration requirements during engine operation.

[0037] 5. The present invention provides a micro hydrogen bubble / diesel fuel preparation and supply device. The integrated sensors and actuators can ensure the stable preparation of micro hydrogen bubble / diesel fuel and the smooth operation of the engine. The properties of hydrogen bubble / diesel fuel are used to improve the atomization effect and enhance the atomization uniformity, thereby achieving the purpose of clean combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a structural diagram of a micro hydrogen bubble / diesel fuel preparation and supply device;

[0039] Figure 2 This is a control logic diagram of an electronic control unit for a micro hydrogen bubble / diesel fuel preparation and supply device.

[0040] In the accompanying drawings: fuel tank 1, controllable oil valve 2, diesel filter 3, three-way valve 4, low-pressure oil pump 5, nanobubble generator 6, valve one 7, valve two 8, hydrogen bubble / diesel fuel storage device one 9, pressure sensor one 10, high liquid level sensor 11, valve three 12, bubble concentration sensor 13, low liquid level sensor 14, electronic control unit 15, hydrogen bubble / diesel fuel storage device two 16, liquid level sensor 17, pressure sensor two 18, oil pressure pump 19, high-pressure fuel rail 20, injector 21, three-way check valve 22, flow control valve 23, pressure reducing valve 24, stop valve 25, hydrogen cylinder 26, hydrogen circulation pump 27, hydrogen gas alarm 28, valve four 29, engine 30, hydrogen supply and hydrogen detection seal S100. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0043] like Figure 1-Figure 2 As shown, a micro hydrogen bubble / diesel fuel preparation and supply device provided by the present invention includes:

[0044] Fuel tank 1, controllable oil valve 2, diesel filter 3, three-way valve 4, low-pressure oil pump 5, nanobubble generator 6, hydrogen bubble / diesel fuel storage device 1 9, electronic control unit 15, hydrogen bubble / diesel fuel storage device 2 16, high-pressure oil pump 19, high-pressure oil rail 20, fuel injector 21, engine 30, and hydrogen supply and hydrogen detection seal S100;

[0045] The diesel flow channel between the fuel tank 1 and the high-pressure fuel pump 19 is a low-pressure oil circuit portion; wherein the outlet of the fuel tank 1 is connected to the inlet of the controllable oil valve 2, the outlet of the controllable oil valve 2 is connected to the inlet of the diesel filter 3, the outlet of the diesel filter 3 is connected to the inlet 1 of the three-way valve 4, the outlet 3 of the three-way valve 4 is connected to the inlet of the low-pressure fuel pump 5, the outlet of the low-pressure fuel pump 5 is connected to the inlet of the nanobubble generator 6, the outlet of the nanobubble generator 6 is connected to the inlet of the hydrogen bubble / diesel fuel storage device 19, the outlet of the hydrogen bubble / diesel fuel storage device 19 is connected to the inlet of the hydrogen bubble / diesel fuel storage device 2 16, and the outlet of the hydrogen bubble / diesel fuel storage device 2 16 is connected to the inlet of the high-pressure fuel pump 19;

[0046] The high-pressure oil pump 19 to the injector 21 is a high-pressure oil circuit; wherein the outlet of the high-pressure oil pump 19 is connected to the inlet of the high-pressure oil rail 20, the outlet of the high-pressure oil rail 20 is connected to the inlet of the injector 21, and the injector 21 is connected to the engine 30.

[0047] In the embodiment of the present invention, as a preferred embodiment of the present invention, the inlet of one end of the nano bubble generator 6 is connected to the low-pressure oil pump 5, the inlet of the other end is connected to the outlet of the three-way check valve 22, and the outlet is connected to the hydrogen bubble / diesel fuel storage device 9;

[0048] The nanobubble generator 6 uses fluid dynamics cavitation to generate microbubbles using turbulence and the principle of a venturi tube, ensuring that micro hydrogen bubbles / diesel fuel with a concentration that meets the requirements can be cyclically produced within the designed preparation time range of the device. The nanobubble generator method includes but is not limited to using venturi tube cavitation, and can also be produced by methods such as mechanical cutting and ultrasonic cavitation.

[0049] In an embodiment of the present invention, as a preferred embodiment of the present invention, the hydrogen bubble / diesel fuel storage device 1 9 is integrated with a valve 1 7, a valve 2 8, and a valve 3 12, and is also equipped with a pressure sensor 10, a high liquid level sensor 11, a bubble concentration sensor 13, and a low liquid level sensor 14; the valve 1 7 is connected to the inlet 2 of the three-way valve 4, the valve 2 8 is connected to the inlet of the hydrogen circulation pump 27, and the valve 3 12 is connected to the hydrogen bubble / diesel fuel storage device 2 16;

[0050] The openings of the valve 1 7, valve 2 8, and valve 3 12 can be adjusted by an electronic control unit 15. The valve 2 8 and the pressure sensor 10 are both placed on the top of the hydrogen bubble / diesel fuel storage device 1 9. The high liquid level sensor 11 is placed at 80%-90% of the height of the hydrogen bubble / diesel fuel storage device 1 9. The bubble concentration sensor 13 is placed at 50% of the height of the hydrogen bubble / diesel fuel storage device 1 9 and can be an optical fiber microbubble concentration sensor based on nano-gold film or a microbubble concentration sensor based on ultrasonic cavitation.

[0051] In addition, the bubble concentration can also be characterized by measuring the zeta potential or other characteristics of the micro hydrogen bubbles / diesel fuel; the low liquid level sensor 14 is placed at 10%-20% of the height of the hydrogen bubble / diesel fuel storage device 9, and the valve three 12 and valve one 7 are placed below the low liquid level sensor 14 to facilitate the outflow of diesel; the storage capacity between the high liquid level sensor 11 and the low liquid level sensor 14 should be greater than or equal to the total capacity of the hydrogen bubble / diesel fuel storage device 2 16.

[0052] In an embodiment of the present invention, as a preferred embodiment of the present invention, a liquid level sensor 17 is integrated on the hydrogen bubble / diesel fuel storage device 2 16, and the inlet at one end of the hydrogen bubble / diesel fuel storage device 2 16 is connected to the valve 3 12, and the inlet at the other end is connected to the high-pressure oil pump 19 and the oil return port of the injector 21; the capacity of the hydrogen bubble / diesel fuel storage device 2 16 meets the oil demand of the engine under various loads such as large, medium and small within a certain period of time; the liquid level sensor 17 adopts a reed switch type. If the liquid level of the hydrogen bubble / diesel fuel storage device 2 16 is lower than the preset height, the valve 3 12 is opened to supply oil, regardless of whether the bubble concentration and liquid level in the hydrogen bubble / diesel fuel storage device 1 9 reach the preset values.

[0053] In the embodiment of the present invention, as a preferred embodiment of the present invention, the high-pressure fuel rail 20 is integrated with a second pressure sensor 18 , and the second pressure sensor 18 transmits the received pressure signal to the electronic control unit 15 for status characterization.

[0054] In the embodiment of the present invention, as a preferred embodiment of the present invention, the hydrogen supply and hydrogen detection sealing body S100 includes a three-way check valve 22, a flow control valve 23, a pressure reducing valve 24, a stop valve 25, a hydrogen cylinder 26, a hydrogen circulation pump 27, a hydrogen gas alarm 28 and a valve 29; in terms of gas circuit connection, the stop valve 25, the pressure reducing valve 24 and the flow control valve 23 are sequentially connected between the hydrogen cylinder 26 and the three-way check valve 22, and the hydrogen supply and hydrogen detection sealing body S100 can prevent the hydrogen leaked in the chamber from leaking out; the three-way check valve 22 can ensure that the hydrogen will not flow back, and the inlet of the three-way check valve 22 is connected to the flow The control valve 23 is connected, the inlet 2 of the three-way check valve 22 is connected to the hydrogen circulation pump 27, and the outlet 3 is connected to the nano bubble generator 6; the hydrogen circulation pump 27 is connected to the valve 2 8, and its speed can be controlled by the electronic control unit. Different speeds are preset according to different engine operating conditions to ensure that the hydrogen circulation amount is close to the amount of hydrogen escaping from the hydrogen bubble / diesel fuel storage device 9; due to the relatively low density of hydrogen, the hydrogen gas alarm 28 is installed above the hydrogen supply and hydrogen detection seal S100, and the valve 4 29 is installed above the outer side of the hydrogen supply and hydrogen detection seal S100 to facilitate hydrogen discharge processing after hydrogen leakage;

[0055] Diesel drawn from the low-pressure oil pump 5 and hydrogen supplied from the hydrogen cylinder 26 form a certain concentration of micro hydrogen bubbles / diesel fuel in the nanobubble generator 6. After circulating through the hydrogen bubble / diesel fuel storage device 1 9 to reach the required concentration, the fuel enters the hydrogen bubble / diesel fuel storage device 2 16 for storage. The prepared micro hydrogen bubble / diesel fuel is then pressurized to a sufficient and stable pressure in the common rail pipe by the high-pressure oil pump 19 and injected into the cylinder through the injector 21 for atomized combustion.

[0056] The present invention proposes a micro hydrogen bubble / diesel fuel preparation and supply device, comprising a fuel tank 1, a controllable oil valve 2, a diesel filter 3, a three-way valve 4, a low-pressure oil pump 5, a nanobubble generator 6, a hydrogen bubble / diesel fuel storage device 1 9, an electronic control unit 15, a hydrogen bubble / diesel fuel storage device 2 16, a high-pressure oil pump 19, a high-pressure oil rail 20, an injector 21, an engine 30, and a hydrogen supply and hydrogen detection seal S100.

[0057] The diesel flow path between the fuel tank 1 and the high-pressure fuel pump 19 is the low-pressure fuel circuit. When the low-pressure fuel pump is turned on, diesel flows from the fuel tank 1 through the controllable fuel valve 2, the diesel filter 3, the three-way valve 4, the low-pressure fuel pump 5, the nanobubble generator 6, the hydrogen bubble / diesel fuel storage device 1 9, and the hydrogen bubble / diesel fuel storage device 2 16, before finally entering the high-pressure fuel pump 19. The outlet of the fuel tank 1 is connected to the inlet of the controllable fuel valve 2, which is connected to the inlet of the diesel filter 3, which is connected to the inlet of the three-way valve 4, which is connected to the inlet of the low-pressure fuel pump 5. The outlet of the low-pressure fuel pump 5 is connected to the inlet of the nanobubble generator 6, which is connected to the inlet of the hydrogen bubble / diesel fuel storage device 1 9, which is connected to the inlet of the hydrogen bubble / diesel fuel storage device 2 16, and the outlet of the hydrogen bubble / diesel fuel storage device 2 16 is connected to the inlet of the high-pressure fuel pump 19.

[0058] Inside the nanobubble generator 6, fluid dynamics cavitation is used to generate microbubbles using turbulence and the principles of a Venturi tube, ensuring that the required concentration of micro hydrogen bubbles / diesel fuel can be produced within the device's designed production time. Other methods such as mechanical cutting and ultrasonic cavitation can also be used.

[0059] Integrated into hydrogen bubble / diesel fuel storage device 1 (9) are valve 1 (7), valve 2 (8), valve 3 (12), pressure sensor 1 (10), high liquid level sensor 11, bubble concentration sensor 13, and low liquid level sensor 14. Based on the parameters measured by these sensors, micro hydrogen bubbles / diesel fuel circulates between hydrogen bubble / diesel fuel storage device 1 (9), three-way valve 4, low-pressure oil pump 5, and nanobubble generator 6.

[0060] Valve 1 (7) is connected to inlet 2 of three-way valve 4. Its opening and closing are controlled by electronic control unit 15, with preset settings of fully open and closed. This valve is primarily responsible for the production cycle of micro hydrogen bubbles / diesel fuel. When nanobubble generator 6 is in operation, valve 1 (7) opens, and a certain concentration of micro hydrogen bubbles / diesel fuel circulates between hydrogen bubble / diesel fuel storage device 1 (9), three-way valve 4, low-pressure oil pump 5, and nanobubble generator 6 until both the fuel bubble concentration and the liquid level in hydrogen bubble / diesel fuel storage device 1 (9) reach preset values.

[0061] The pressure sensor 10 is responsible for real-time measurement of the gas pressure within the hydrogen bubble / diesel fuel storage device 9. The opening of the valve 28 is controlled by the electronic control unit 15, with preset settings of fully open and closed, primarily responsible for hydrogen circulation. Before the micro hydrogen bubble / diesel fuel production and supply device operates, the system presets maximum and minimum pressures within the hydrogen bubble / diesel fuel storage device 9. When the actual pressure exceeds the maximum preset pressure, the hydrogen circulation pump 27 and valve 28 are activated, allowing hydrogen to circulate through the hydrogen bubble / diesel fuel storage device 9, the hydrogen circulation pump 27, the three-way check valve 22, and the nanobubble generator 6. When the actual pressure falls below the minimum preset pressure, the hydrogen circulation pump 27 and valve 28 are closed.

[0062] Valve 3 (12) is connected to hydrogen bubble / diesel fuel storage device 2 (16). The opening of valve 3 (12) is controlled by an electronic control unit (15) and is preset to either fully open or closed. This valve is responsible for transferring micro hydrogen bubbles / diesel fuel from hydrogen bubble / diesel fuel storage device 1 (9) to hydrogen bubble / diesel fuel storage device 2 (16). The opening and closing of valve 3 is closely related to the liquid level, bubble concentration, and liquid level of hydrogen bubble / diesel fuel storage device 1 (9). Primarily, valve 3 (12) is opened when the liquid level of hydrogen bubble / diesel fuel storage device 2 (16) falls below a preset level. When the bubble concentration in hydrogen bubble / diesel fuel storage device 1 (9) reaches a preset concentration value and the liquid level reaches a preset maximum level, valve 3 (12) is opened. When the liquid level falls below a preset minimum level or the bubble concentration falls below a preset concentration, valve 3 (12) is closed. Specifically, when valve three 12 is opened because the liquid level of hydrogen bubble / diesel fuel storage device two 16 is lower than a preset height, valve three 12 can be closed only when the liquid level of hydrogen bubble / diesel fuel storage device one 9 is lower than a minimum preset height.

[0063] Regarding gas connections, a shutoff valve 25, a pressure reducing valve 24, and a flow control valve 23 are sequentially connected between the hydrogen cylinder 26 and the three-way check valve 22. A hydrogen circulation pump 27 and a hydrogen gas alarm 28 are also housed within the hydrogen supply and detection enclosure S100. Based on sensor signals received by the electronic control unit 15, hydrogen is pumped through the hydrogen circulation pump 27, and some of the hydrogen escaping from the hydrogen bubble / diesel fuel storage device 9 is circulated through the hydrogen circulation pump 27, the three-way check valve 22, and the nanobubble generator 6.

[0064] The high-pressure oil circuit between the high-pressure oil pump 19 and the fuel injector 21 provides a high-pressure oil circuit. The high-pressure oil pump delivers high-pressure micro-hydrogen bubbles / diesel fuel to the high-pressure fuel rail 20. The high-pressure common rail system accumulates the micro-hydrogen bubbles / diesel fuel, eliminates pressure fluctuations in the fuel, and then delivers it to the fuel injector 21. The solenoid valve's on / off signal activates the injector's injection and stop operations. The outlet of the high-pressure oil pump 19 connects to the inlet of the high-pressure fuel rail 20, which in turn connects to the inlet of the fuel injector 21, ultimately injecting the fuel into the engine 30.

[0065] The input end of the electronic control unit is respectively connected to the bubble concentration sensor 13, the low liquid level sensor 14, the high liquid level sensor 11, the pressure sensor 10, the hydrogen supply and hydrogen detection seal S100, the liquid level sensor 17, and the pressure sensor 2 18, and the output end is respectively connected to the high-pressure oil pump 19, the injector 21, the hydrogen bubble / diesel fuel storage device 9, the controllable oil valve 2, the hydrogen supply and hydrogen detection seal S100, and the low-pressure oil pump 5.

[0066] The present invention proposes a control method for the aforementioned micro hydrogen bubble / diesel fuel production and supply device. The control method for the production of micro hydrogen bubble / diesel fuel uses an electronic control system to monitor various sensors and actuators in real time to ensure that the nanobubble production system can provide micro hydrogen bubble / diesel fuel of sufficient concentration to meet engine demand during the fuel supply process.

[0067] A device for preparing and supplying micro hydrogen bubbles / diesel fuel, characterized by comprising the following steps:

[0068] In the first step, the electronic control unit 15 is initialized after receiving the power supply signal. The controllable oil valve 2, valve 1 7, valve 2 8, valve 3 12 and stop valve 25 are in the closed state, and each sensor sends the measured signal to the electronic control unit 15.

[0069] In the second step, the high-pressure oil pump 19 is started to establish rail pressure. The high-pressure oil pump 19 extracts micro hydrogen bubbles / diesel fuel from the hydrogen bubble / diesel fuel storage device 16, and after the high-pressure oil rail 20 establishes a stable pressure, it is injected into the engine 30 cylinder through the injector 21 for combustion.

[0070] The third step is to determine the liquid level parameter measured by the liquid level sensor 17. If the liquid level in the second bubble hydrogen / diesel fuel storage device 16 is below a preset value, the electronic control unit 15 outputs a control signal to open valve 3 12, allowing the fuel in the first bubble hydrogen / diesel fuel storage device 9 to flow into the second bubble hydrogen / diesel fuel storage device 16. Otherwise, the state remains unchanged and the process proceeds to the next step.

[0071] The fourth step is to determine the bubble concentration and liquid level parameters in the hydrogen bubble / diesel fuel storage device 1 (9). If the liquid level is below a minimum preset value, regardless of whether the bubble concentration has reached the preset value, the micro hydrogen bubble / diesel fuel production cycle is initiated. Specifically, the low-pressure oil pump 5 is started, valve 1 (7), controllable oil valve 2, and shutoff valve 25 are opened, and valve 3 (12) is closed. This pumps fuel from the fuel tank 1 to increase the liquid level, while also initiating the production cycle to increase the bubble concentration in the fuel. If the liquid level is above the minimum preset height and below the maximum preset height, and the bubble concentration is below the preset value, the micro hydrogen bubble / diesel fuel production cycle is also initiated, maintaining the aforementioned state: oil pumping from the low-pressure oil circuit, hydrogen supply from the gas circuit, and the bubble production cycle. If the liquid level is above the minimum preset height and the bubble concentration reaches or exceeds the preset value, the micro hydrogen bubble / diesel fuel production cycle is shut down. Specifically, the low-pressure oil pump 5 and hydrogen circulation pump 27 are shut down, the shutoff valve 25 and valve 2 (8) are closed, and valve 3 (12) is opened, halting the oil pumping, hydrogen supply from the gas circuit, and the bubble production cycle. If the liquid level reaches the maximum preset height and the bubble concentration falls below a preset value, the controllable oil valve 2 is closed, stopping the low-pressure oil line from pumping oil from the tank. Valve 1 7, the low-pressure oil pump 5, and the shutoff valve 25 are opened, and valve 3 12 is closed, restarting the gas line hydrogen supply and bubble generation cycle. If the liquid level reaches the maximum preset height and the bubble concentration reaches or exceeds a preset value, the controllable oil valve 2, the low-pressure oil pump 5, the hydrogen circulation pump 27, the shutoff valve 25, and valve 2 are closed, and valve 3 12 is opened, stopping the oil line pumping, the gas line hydrogen supply, and the bubble generation cycle. The prepared micro hydrogen bubbles / diesel fuel of a certain concentration are then passed into hydrogen bubble / diesel fuel storage device 2 16.

[0072] The fifth step is to determine the pressure sensor parameters in the hydrogen bubble / diesel fuel storage device 9. If the pressure is higher than the maximum preset pressure value, open the valve 2 8 and the hydrogen circulation pump 27. If the pressure is lower than the minimum preset pressure value, close the valve 2 8 and the hydrogen circulation pump 27.

[0073] During this process, hydrogen gas alarm 28 monitors the hydrogen supply and hydrogen detection seal S100 for leaks. Upon detecting hydrogen levels, an alarm is immediately sounded and transmitted back to the electronic control unit 15, which then sends an alarm to the control room. Simultaneously, the electronic control unit 15 issues a command to close shutoff valve 25, cutting off the hydrogen supply and shutting down the hydrogen circulation pump 27, valve 3 12, and low-pressure oil pump 5.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0075] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A micro hydrogen bubble / diesel fuel preparation and supply device, characterized in that: include: Fuel tank, controllable oil valve, diesel filter, three-way valve, low-pressure oil pump, nanobubble generator, hydrogen bubble / diesel fuel storage device 1, electronic control unit, hydrogen bubble / diesel fuel storage device 2, high-pressure oil pump, high-pressure oil rail, fuel injector, engine, and hydrogen supply and hydrogen detection seals; The diesel flow channel between the fuel tank and the high-pressure fuel pump is a low-pressure fuel circuit; wherein the fuel tank outlet is connected to the controllable fuel valve inlet, the controllable fuel valve outlet is connected to the diesel filter inlet, the diesel filter outlet is connected to the inlet 1 of the three-way valve, the outlet 3 of the three-way valve is connected to the low-pressure fuel pump inlet, the low-pressure fuel pump outlet is connected to the inlet of the nano-bubble generator, the nano-bubble generator outlet is connected to the first inlet of the hydrogen bubble / diesel fuel storage device, the first outlet of the hydrogen bubble / diesel fuel storage device is connected to the second inlet of the hydrogen bubble / diesel fuel storage device, and the second outlet of the hydrogen bubble / diesel fuel storage device is connected to the high-pressure fuel pump inlet; The high-pressure oil pump to the fuel injector is a high-pressure oil circuit; wherein the high-pressure oil pump outlet is connected to the high-pressure oil rail inlet, the high-pressure oil rail outlet is connected to the fuel injector inlet, and the fuel injector is connected to the engine; The inlet of one end of the nano bubble generator is connected to the low-pressure oil pump, the inlet of the other end is connected to the outlet of the three-way check valve, and the outlet is connected to the hydrogen bubble / diesel fuel storage device. The first hydrogen bubble / diesel fuel storage device is integrated with valves 1, 2, and 3, and is also equipped with a first pressure sensor, a high liquid level sensor, a bubble concentration sensor, and a low liquid level sensor; the first valve is connected to the second inlet of the three-way valve, the second valve is connected to the inlet of the hydrogen circulation pump, and the third valve is connected to the second hydrogen bubble / diesel fuel storage device; The openings of valves 1, 2, and 3 are all adjusted by an electronic control unit; valve 2 and pressure sensor 1 are both placed on top of a hydrogen bubble / diesel fuel storage device 1, the high liquid level sensor is placed at 80%-90% of the height of the hydrogen bubble / diesel fuel storage device 1, and the bubble concentration sensor is placed at 50% of the height of the hydrogen bubble / diesel fuel storage device 1; the low liquid level sensor is placed at 10%-20% of the height of the hydrogen bubble / diesel fuel storage device 1, and valve 3 and valve 1 are placed below the low liquid level sensor; the storage capacity between the two liquid level sensors is greater than or equal to the total capacity of the hydrogen bubble / diesel fuel storage device 2; The second hydrogen bubble / diesel fuel storage device is integrated with a liquid level sensor. The inlet at one end of the second hydrogen bubble / diesel fuel storage device is connected to the valve 3, and the inlet at the other end is connected to the high-pressure oil pump and the oil return port of the injector. The liquid level sensor adopts a reed switch type. The high-pressure fuel rail is integrated with a second pressure sensor, which transmits the received pressure signal to the electronic control unit.

2. The micro hydrogen bubble / diesel fuel preparation and supply device according to claim 1, characterized in that: The hydrogen supply and hydrogen detection sealing body includes a three-way check valve, a flow control valve, a pressure reducing valve, a stop valve, a hydrogen cylinder, a hydrogen circulation pump, a hydrogen gas alarm and a fourth valve; in terms of gas circuit connection, the stop valve, the pressure reducing valve and the flow control valve are connected in sequence between the hydrogen cylinder and the three-way check valve, the first inlet of the three-way check valve is connected to the flow control valve, the second inlet of the three-way check valve is connected to the hydrogen circulation pump, and the third outlet is connected to the nano bubble generator; the hydrogen circulation pump is connected to the second valve, the hydrogen gas alarm is installed above the hydrogen supply and hydrogen detection sealing body, and the fourth valve is installed above the outer side of the hydrogen supply and hydrogen detection sealing body.

3. The micro hydrogen bubble / diesel fuel preparation and supply device according to claim 1, characterized in that: The input end of the electronic control unit is respectively connected to the bubble concentration sensor, the low liquid level sensor, the high liquid level sensor, the first pressure sensor, the hydrogen supply and hydrogen detection seal, the liquid level sensor and the second pressure sensor, and the output end is respectively connected to the high-pressure oil pump, the injector, the first hydrogen bubble / diesel fuel storage device, the controllable oil valve, the hydrogen supply and hydrogen detection seal and the low-pressure oil pump.

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