Hydrogen-Oxygen Cycle Engine and Method of Using the Same

Abstract

The present invention relates to a hydrogen-oxygen circulation engine and its use method. The hydrogen-oxygen circulation engine includes an air cylinder assembly, a hydrogen gas supply assembly, an oxygen gas supply assembly, a circulating medium assembly, an atomized water assembly, a condensed water recovery assembly and a control system, which has the advantages of reasonable structural design, high degree of automation, no carbon emission and the like, and can thoroughly solve the problem of polluted environment.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle internal combustion engines, marine internal combustion engines, and power generation internal combustion engines, and particularly relates to a hydrogen-oxygen circulation engine and a method for using the same.

Background Art

[0002] Currently, as the relevant policies for national new energy vehicles are being implemented one after another, automobile companies and vehicle research and design institutes are devoting efforts to the research and development of new energy vehicles, and the number of related patent applications for new energy vehicles is also increasing. General new energy vehicles include lithium battery electric vehicles, fuel / gas hybrid vehicles, hydrogen vehicles, etc. Taking hydrogen gas vehicles as an example, the applicant proposes a hydrogen-oxygen circulation engine and a method for using the same based on how to improve the energy conversion efficiency of the engine, which is one of the main components of the vehicle, and solve the technical problem of environmental pollution, so as to meet the actual design and use requirements.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The object of the present invention is to provide a hydrogen-oxygen circulation engine and a method for using the same, which have the advantages of reasonable structural design, high degree of automation, lower energy consumption, longer driving range, higher output, higher temperature efficiency, no emission of any pollutants, only discharging unburned water, and no generation of carbon emissions compared with conventional engines, can thoroughly solve the problem of polluting the environment, and can be used in marine, vehicle, and power generation internal combustion engines.

Means for Solving the Problems

[0004] To achieve the above object, the present invention uses the following technical solutions.

[0005] A hydrogen-oxygen circulation engine, wherein the hydrogen-oxygen circulation engine includes an air cylinder assembly, a hydrogen gas supply assembly, an oxygen gas supply assembly, a circulation medium assembly, an atomized water assembly, a condensed water recovery assembly, and a control system. The air cylinder assembly includes an air cylinder body, a first intake branch pipe, an intake valve, an exhaust valve, an exhaust branch pipe, a nozzle, a piston, a link, and a crankshaft. The piston is transmission-connected to the crankshaft via the link. The piston is installed within the air cylinder body. The uppermost part of the air cylinder body is connected to the intake valve, the exhaust valve, and the nozzle respectively. One end of the first intake branch pipe is connected to the intake valve. One end of the exhaust branch pipe is connected to the exhaust valve. The hydrogen gas supply assembly includes a hydrogen gas storage tank, a hydrogen gas flame arrester, and a hydrogen gas pipe. Both ends of the hydrogen gas pipe are connected to the hydrogen gas storage tank and the nozzle respectively. The hydrogen gas flame arrester is installed at the connection point between the hydrogen gas storage tank and the hydrogen gas pipe. The oxygen gas supply assembly includes an oxygen gas storage tank, an oxygen gas intake header pipe, and an oxygen gas intake branch pipe. One end of the oxygen gas intake header pipe is connected to the hydrogen gas storage tank. One end of the oxygen gas intake branch pipe is connected to the oxygen gas intake header pipe. The atomized water assembly includes an atomized water storage tank, an air cylinder atomized water pipe, an intake branch pipe atomized water pipe, and a transport pump. Both ends of the intake branch pipe atomized water pipe are connected to the atomized water storage tank and the first intake branch pipe respectively. One end of the air cylinder atomized water pipe is connected to the intake branch pipe atomized water pipe, and the other end is connected to the nozzle. The transport pump is installed at the connection point between the atomized water storage tank and the intake branch pipe atomized water pipe. The circulation medium assembly includes a circulation medium pipe, a circulation medium branch pipe, an intake header pipe, and an exhaust header pipe. Both ends of the circulation medium pipe are connected to one end of the intake header pipe and one end of the exhaust header pipe respectively. Both ends of the circulation medium branch pipe are connected to the other end of the exhaust header pipe and the hydrogen gas pipe respectively. The other end of the oxygen gas intake header pipe is connected to the intake header pipe. The other end of the oxygen gas intake branch pipe isIt is connected to the intake header pipe, and the other end of the intake header pipe is connected to the first intake branch pipe. The condensate recovery assembly includes a condenser, a condensate pipe, and a condensate storage tank installed in the atomized water storage tank. Both ends of the condensate pipe are connected to one end of the condenser and the condensate storage tank respectively. The other end of the condenser is connected to the exhaust header pipe. The condensate storage tank is connected to the atomized water storage tank. An air intake pipe is further installed on the intake header pipe. An exhaust gas discharge pipe connected to the exhaust header pipe is further installed on the exhaust header pipe. The control system includes a PLC controller, a man-machine interface, and a sensor assembly. The PLC controller is connected to the man-machine interface and the sensor assembly respectively. The sensor assembly includes a hydrogen gas flow sensor, a hydrogen gas pressure sensor, a hydrogen gas shut-off valve, and a hydrogen gas throttle control valve installed on the hydrogen gas pipe, an air cylinder atomized water control valve installed on the air cylinder atomized water pipe, a temperature sensor installed on the exhaust header pipe, an oxygen gas pressure sensor, an oxygen gas flow sensor, and an oxygen gas flow control valve installed on the oxygen gas header pipe, an oxygen gas branch flow control valve installed on the oxygen gas branch, a circulating medium pressure sensor installed on the intake header pipe, an oxygen gas / hydrogen gas content sensor installed on the circulating medium pipe, a circulating medium control valve, an air intake control valve installed on the air intake pipe, an exhaust gas discharge control valve installed on the exhaust gas discharge pipe, and a branch pipe flow control valve installed on the circulating medium branch pipe. All the above sensors are connected to the PLC controller data signal, and the PLC controller is connected to the above valve control respectively.

[0006] As a further optimization of the above technical solution, an exhaust gas discharge safety valve and an exhaust gas discharge pipe trap are further installed on the exhaust gas discharge pipe. An overflow port and an automatic drain valve connected to the PLC controller are installed on the condensate storage tank. An intake header pipe trap connected to the PLC controller is further installed at the other end of the intake header pipe.

[0007] As a further optimization of the above technical solution, a filter is installed in the air intake pipe, an air cylinder atomized water control valve connected to a PLC controller is further installed in the air cylinder atomized water pipe, and an oxygen gas shut-off valve is further installed in the oxygen gas header pipe.

[0008] As a further optimization of the above technical solution, the medium in the circulation medium assembly is water vapor, the hydrogen-oxygen circulation engine uses hydrogen gas as fuel and oxygen gas as an oxidizer, and the components of the exhaust gas after engine combustion are only H2O.

[0009] As a further optimization of the above technical solution, the hydrogen-oxygen circulation engine is controlled using the flow rate ratio of oxygen gas and hydrogen gas, and the PLC controller adjusts the oxygen gas supply amount based on the data signal of the hydrogen gas flow rate sensor to realize the adjustment of the combustion ratio of hydrogen gas and oxygen gas.

[0010] As a further optimization of the above technical solution, the PLC controller realizes fine adjustment of oxygen gas by controlling the oxygen gas branch pipe control valve based on the data signal feedback by the oxygen gas / hydrogen gas flow rate sensor in the circulation medium pipe, and achieves the optimal engine mode.

[0011] As a further optimization of the above technical solution, the hydrogen-oxygen circulation engine has two operating modes of oxygen gas assisted combustion and air assisted combustion that can be automatically switched.

[0012] As a further optimization of the above technical solution, the hydrogen-oxygen circulation engine is used in the fields of vehicle internal combustion engines, marine internal combustion engines, and power generation internal combustion engines.

[0013] The usage method of the hydrogen-oxygen circulation engine according to the present invention is Start the engine with the ignition switch, supply power to each component of the hydrogen-oxygen circulation engine. When the engine starts a cold start for the first time, the PLC controller first opens the air control valve to introduce starting air. Based on the feedback value of the data signal of the hydrogen gas flow sensor, the PLC controller controls the engine throttle to inject hydrogen gas into the air cylinder through the nozzle. Hydrogen gas and oxygen gas burn to push the piston, and further reciprocate the link and the crankshaft to do work. The water vapor formed after combustion passes through the exhaust valve and the exhaust branch pipe, through the exhaust header pipe. Part of the water vapor enters the circulation pipe, is mixed with oxygen gas through the flow control valve, enters the air cylinder, is mixed with hydrogen gas and burns. Part of the water vapor passes through the condensate pipe, condenses into water in the condenser, enters the water storage tank, and is recycled as atomized water. Based on the feedback values of the data signals of the hydrogen gas flow sensor and the oxygen gas flow sensor, the PLC controller gradually opens the oxygen gas flow control valve to introduce oxygen gas and synchronously closes it slightly until the air control valve is closed, stopping the introduction of air. At this time, it enters the hydrogen gas-oxygen gas combustion stage, and the generated water vapor circulation medium is discharged into the atmosphere from the exhaust gas discharge pipe in the exhaust header pipe bypass. The PLC controller controls the exhaust gas discharge control valve based on the feedback value of the circulation medium pressure sensor to adjust the water vapor discharge amount. When the pressure of the circulation medium pipe rises to the safety set value, the exhaust gas discharge safety valve automatically opens to ensure the stability of the system pressure. Step 1) After the above step 1), based on the feedback values of the data signals of the oxygen gas flow sensor and the circulating medium pressure sensor in the operation mode of the air cylinder assembly, the PLC controller controls the oxygen gas header pipe control valve, thereby introducing oxygen gas and the circulating medium into the air cylinder through the intake header pipe - intake branch pipe - intake valve. By controlling the hydrogen gas throttle control valve and the circulating medium branch pipe control valve, hydrogen gas and the circulating medium are introduced into the air cylinder through the hydrogen gas pipe, the circulating medium branch pipe, and the nozzle. At the same time, the air cylinder atomized water control valve is automatically opened to inject atomized water into the air cylinder. The PLC controller monitors the feedback value of the data signal of the oxygen gas / hydrogen gas flow sensor in the circulating medium pipe in real time and controls the oxygen gas branch pipe control valve to adjust the content of trace hydrogen gas and oxygen gas in the circulating medium to ensure that hydrogen gas and oxygen gas always burn in an optimal state. Step 2) Based on the feedback values of the data signals of the hydrogen gas flow sensor, the circulating medium pressure sensor, the oxygen gas flow sensor, and the oxygen gas / hydrogen gas flow sensor in the operation mode of the air cylinder assembly, the PLC controller automatically controls each control valve according to the feedback value of the hydrogen gas flow sensor, adjusts the flow rates of oxygen gas, the circulating medium, and atomized water, and operates the engine in a stable mode. Step 3) The PLC controller continuously monitors the engine operation mode in real time, automatically adjusts the opening degree of the intake branch pipe atomized water control valve, and injects atomized water into the intake branch pipe. Step 4) The circulating medium in the engine air cylinder continuously circulates according to steps 1), 2), 3), and 4). By continuously adjusting the hydrogen gas injection amount of the nozzle by the hydrogen-oxygen circulation engine, it is realized that the torque is large when the low-speed load is large during operation and the torque is small when the high-speed load is small. Based on the feedback value of the data signal of the temperature sensor in the exhaust gas pipe in the operation mode of the air cylinder assembly, the PLC controller monitors the temperature value of the circulating medium in real time to ensure the stability of the engine operation temperature. Step 5) When the oxygen gas in the oxygen gas storage tank of the hydrogen-oxygen circulation engine is about to run out, the oxygen gas pressure sensor sends a signal. At this time, the PLC controller automatically opens the air control valve, closes the oxygen gas shut-off valve, and automatically switches to the air-assisted combustion mode. At the same time, it closes the circulation medium pipe control valve. Part of the water vapor generated by the engine condenses into water in the condenser through the condensate pipe and enters the water storage tank, where it is recycled as atomized water. Part of it does not perform water vapor circulation and is discharged into the atmosphere through the exhaust gas discharge control valve (step 6); In the hydrogen-oxygen circulation engine, a hydrogen gas pressure sensor is installed in the hydrogen gas pipe. When the hydrogen gas pressure is lower than the set value, it sends an alarm signal to alert for the replenishment of hydrogen gas (step 7); In the hydrogen-oxygen circulation engine, automatic traps are provided in both the exhaust gas discharge pipe and the medium circulation pipe. During the operation of the engine, the condensate water in the pipes is automatically discharged through the traps (step 8); In the hydrogen-oxygen circulation engine, an automatic drain valve, an overflow valve, and a temperature sensor are provided in the water storage tank. After the engine stops operating, the PLC controller monitors the feedback value of the temperature sensor. When the temperature value reaches the freezing point, it automatically discharges all the water in the water storage tank (step 9); In the hydrogen-oxygen circulation engine, emergency shut-off valves, inertia switches, and pressure lower limit interlock alarm devices are provided in the hydrogen gas pipe and the oxygen gas pipe. A temperature upper limit interlock alarm device is installed in the circulation medium pipe. In the emergency mode where the pressure of oxygen gas and hydrogen gas is lower than the set value, the temperature of the circulation medium is higher than the set value, an impact occurs, or the hydrogen-oxygen circulation engine ignites, the supply of hydrogen gas and oxygen gas is blocked in real time to ensure the safe operation of the engine (step 10).

[0014] For further optimization of the above means, the operating modes of the air cylinder assembly include operating and stopping modes, acceleration mode, deceleration mode, idle mode, and air mode.

[0015] As a further optimization of the above means, when the engine stops, first close the hydrogen gas control valve to stop the hydrogen gas supply. At the same time, close the oxygen gas control valve and delay closing the circulating steam control valve. Bring the hydrogen gas and oxygen gas remaining in the engine mixing pipe by the circulating medium into the air cylinder and burn them all out.

Advantages of the Invention

[0016] The hydrogen-oxygen circulation engine and its usage method according to the present invention have the following beneficial effects.

[0017] 1. The hydrogen-oxygen circulation engine uses hydrogen gas as fuel and oxygen gas as an oxidizer. The components of the exhaust gas after engine combustion are only water (H2O), without generating carbon emissions, with zero emission pollutants, and thoroughly solving the problem of environmental pollution.

[0018] 2. The hydrogen-oxygen circulation engine uses a mixed circulation combustion technology of oxygen gas and water vapor in the engine exhaust gas. Hydrogen gas and oxygen gas burn in the air cylinder to generate only water vapor. The water vapor in the exhaust pipe is introduced into the intake pipe as a circulating medium and mixed with oxygen gas. The oxygen gas is diluted. Then the mixed gas enters the air cylinder through the intake branch pipe, thus reducing the oxygen gas concentration and being able to dilute the oxygen gas concentration at a predetermined ratio.

[0019] 3. The hydrogen-oxygen circulation engine is connected to the hydrogen gas pipe before introducing the circulating medium pipe into the nozzle. The mixed hydrogen gas enters the air cylinder through the nozzle in the air cylinder. At the same time, the water condensed from the steam generated by the combustion of hydrogen gas and oxygen gas enters the nozzle. After being atomized in the nozzle, it is injected into the air cylinder and becomes steam, further diluting the hydrogen gas.

[0020] 4. The hydrogen-oxygen circulation engine is provided with an atomized water nozzle in the intake branch pipe. The atomized water injected into the intake branch pipe is mixed with oxygen gas and the circulating medium and enters the air cylinder. After that, it generates water vapor and absorbs heat at the same time. The water vapor expands and its volume increases. The hydrogen-oxygen circulation engine is provided with a hydrogen gas and an atomized water nozzle in the air cylinder. After the hydrogen gas, the circulating medium and the atomized water are injected into the air cylinder, the hydrogen gas concentration is further diluted, and at the same time, it burns with the oxygen gas of the combustion improver and expands. Due to the heat generated by the combustion, the condensed water vaporizes into steam and expands to assist in increasing the pressure in the air cylinder to do work. The amounts of hydrogen gas, oxygen gas, water vapor, and condensed water injected into the air cylinder are automatically adjusted based on a predetermined ratio to each other.

[0021] 5. Hydrogen gas and oxygen gas burn in the air cylinder to generate only water vapor. At this time, the water vapor actually does work in the air cylinder. At the same time, hydrogen gas and oxygen gas burn to generate heat. Water vaporizes into steam, expands, and its volume increases, increasing the pressure in the air cylinder and pushing the piston to move to do work. The pressure in the engine air cylinder can be adjusted according to the demand. By adjusting the amount of atomized water entering the air cylinder, the pressure in the air cylinder can be increased or decreased, thereby increasing or decreasing the maximum current of the internal combustion engine. In this way, the internal combustion engine becomes a variable power engine.

[0022] 6. The water vapor generated by combustion in the hydrogen-oxygen circulation engine is cooled to water through the condensed water pipe and then stored in the water storage tank. The excess water in the water storage tank is automatically discharged from the overflow port provided in the water storage tank. The excess water vapor in the exhaust gas is discharged through the pressure valve via the exhaust gas discharge pipe.

[0023] 7. The hydrogen-oxygen circulation engine can operate in two modes: oxygen gas assisted combustion and air assisted combustion, which can be automatically switched.

[0024] 8. The hydrogen-oxygen circulation engine is controlled using the flow rate ratio of oxygen gas and hydrogen gas. The PLC controller adjusts the oxygen gas supply amount based on the data signal of the hydrogen gas flow rate sensor to achieve the adjustment of the combustion ratio of the automatic hydrogen gas and oxygen gas.

[0025] 9. The PLC controller of the hydrogen-oxygen circulation engine controls the oxygen gas branch pipe control valve based on the data signal feedback by the oxygen gas / hydrogen gas flow rate sensor of the circulation medium pipe to achieve the fine adjustment of the oxygen gas and reach the optimal engine mode.

Brief Description of the Drawings

[0026]

Figure 1

Embodiments for Carrying out the Invention

[0027] Hereinafter, the hydrogen-oxygen circulation engine according to the present invention and its usage method will be described in detail with reference to FIG. 1.

[0028] A hydrogen-oxygen circulation engine, wherein the hydrogen-oxygen circulation engine includes an air cylinder assembly, a hydrogen gas supply assembly, an oxygen gas supply assembly, a circulating medium assembly, an atomized water assembly, a condensed water recovery assembly, and a control system. The air cylinder assembly includes an air cylinder body 1, a first intake branch pipe 2, an intake valve 3, an exhaust valve 4, an exhaust branch pipe 5, a nozzle 6, a piston 7, a link 8, and a crankshaft 9. The piston is transmission-connected to the crankshaft via the link. The piston is installed inside the air cylinder body. The uppermost part of the air cylinder body is connected to the intake valve, the exhaust valve, and the nozzle 6 respectively. One end of the first intake branch pipe is connected to the intake valve. One end of the exhaust branch pipe is connected to the exhaust valve. The hydrogen gas supply assembly includes a hydrogen gas storage tank 10, a hydrogen gas flame arrester 11, and a hydrogen gas pipe 12. Both ends of the hydrogen gas pipe are connected to the hydrogen gas storage tank and the nozzle respectively. The hydrogen gas flame arrester is installed at the connection point between the hydrogen gas storage tank and the hydrogen gas pipe. The oxygen gas supply assembly includes an oxygen gas storage tank 13, an oxygen gas intake header pipe 14, and an oxygen gas intake branch pipe 15. One end of the oxygen gas intake header pipe is connected to the hydrogen gas storage tank. One end of the oxygen gas intake branch pipe is connected to the oxygen gas intake header pipe. The atomized water assembly includes an atomized water storage tank 16, an air cylinder atomized water pipe 17, an intake branch pipe atomized water pipe 18, and a transport pump 19. Both ends of the intake branch pipe atomized water pipe are connected to the atomized water storage tank and the first intake branch pipe respectively. One end of the air cylinder atomized water pipe is connected to the intake branch pipe atomized water pipe, and the other end is connected to the nozzle. The transport pump is installed at the connection point between the atomized water storage tank and the intake branch pipe atomized water pipe. The circulating medium assembly includes a circulating medium pipe 20, a circulating medium branch pipe 21, an intake header pipe 22, and an exhaust header pipe 23. Both ends of the circulating medium pipe are connected to one end of the intake header pipe and one end of the exhaust header pipe respectively. Both ends of the circulating medium branch pipe are connected to the other end of the exhaust header pipe and the hydrogen gas pipe respectively.The other end of the oxygen gas intake header pipe is connected to the intake header pipe. The other end of the oxygen gas intake branch pipe is connected to the intake header pipe. The other end of the intake header pipe is connected to the first intake branch pipe. The condensate recovery assembly includes a condenser 24, a condensate pipe 25, and a condensate storage tank installed in the atomized water storage tank. Both ends of the condensate pipe are respectively connected to one end of the condenser and the condensate storage tank. The other end of the condenser is connected to the exhaust header pipe. The condensate storage tank is connected to the atomized water storage tank. An air intake pipe 26 is further installed in the intake header pipe. An exhaust gas discharge pipe 27 connected to the exhaust header pipe is further installed in the exhaust header pipe. The control system includes a PLC controller 28, a man-machine interface, and a sensor assembly. The PLC controller is respectively connected to the man-machine interface and the sensor assembly. The sensor assembly includes a hydrogen gas flow sensor 29, a hydrogen gas pressure sensor 30, a hydrogen gas shut-off valve 31, and a hydrogen gas throttle control valve 32 installed in the hydrogen gas pipe, an air cylinder atomized water control valve 33 installed in the air cylinder atomized water pipe, a temperature sensor 34 installed in the exhaust header pipe, an oxygen gas pressure sensor 35, an oxygen gas flow sensor 36, and an oxygen gas flow control valve 37 installed in the oxygen gas header pipe, an oxygen gas branch flow control valve 38 installed in the oxygen gas branch, a circulating medium pressure sensor 39 installed in the intake header pipe, an oxygen gas / hydrogen gas content sensor 40 installed in the circulating medium pipe, a circulating medium control valve 41, an air intake control valve 42 installed in the air intake pipe, an exhaust gas discharge control valve 43 installed in the exhaust gas discharge pipe, and a branch pipe flow control valve 44 installed in the circulating medium branch pipe. All the above sensors are connected to the PLC controller via data signals, and the PLC controller is connected to the above valve controls. An exhaust gas discharge safety valve 45 and an exhaust gas discharge pipe trap 46 are further installed in the exhaust gas discharge pipe. An overflow port 47 and an automatic drain valve 48 connected to the PLC controller are installed in the condensate storage tank. At the other end of the intake header pipe,An intake header pipe trap 49 connected to the PLC controller is further installed. A filter 50 is installed in the air intake pipe, an air cylinder atomized water control valve 51 connected to the PLC controller is further installed in the air cylinder atomized water pipe, and an oxygen gas shut-off valve 52 is further installed in the oxygen gas header pipe.,

[0029] The method of using the hydrogen-oxygen circulation engine according to the present invention is as follows Start the engine with the ignition switch, supply power to each component of the hydrogen-oxygen circulation engine. When the engine starts a cold start for the first time, the PLC controller first opens the air control valve to introduce starting air. Based on the feedback value of the data signal of the hydrogen gas flow sensor, the PLC controller controls the engine throttle to inject hydrogen gas into the air cylinder through the nozzle. The hydrogen gas and oxygen gas burn to push the piston and further reciprocate the link and crankshaft to do work. The water vapor formed after combustion passes through the exhaust valve and exhaust branch pipe and then through the exhaust header pipe. A part of the water vapor enters the circulation pipe, passes through the flow control valve, is mixed with oxygen gas, enters the air cylinder, is mixed with hydrogen gas and burns. A part of the water vapor passes through the condensate water pipe, condenses into water in the condenser, enters the water storage tank, and is recycled as atomized water. Based on the feedback values of the data signals of the hydrogen gas flow sensor and the oxygen gas flow sensor, the PLC controller gradually opens the oxygen gas flow control valve to introduce oxygen gas and synchronously closes it slightly until the air control valve is closed, stopping the introduction of air. At this time, it enters the hydrogen gas-oxygen gas combustion stage, and the generated water vapor circulation medium is discharged to the atmosphere from the exhaust gas discharge pipe in the exhaust header pipe bypass. The PLC controller controls the exhaust gas discharge control valve based on the feedback value of the circulation medium pressure sensor to adjust the water vapor discharge amount. When the pressure of the circulation medium pipe rises to the safety set value, the exhaust gas discharge safety valve automatically opens to ensure the stability of the system pressure, step 1); After the above step 1), based on the feedback values of the data signals of the oxygen gas flow sensor and the circulating medium pressure sensor in the operation mode of the air cylinder assembly, the PLC controller controls the oxygen gas header pipe control valve, thereby introducing oxygen gas and the circulating medium into the air cylinder through the intake header pipe - intake branch pipe - intake valve. By controlling the hydrogen gas throttle control valve and the circulating medium branch pipe control valve, hydrogen gas and the circulating medium are introduced into the air cylinder through the hydrogen gas pipe, the circulating medium branch pipe, and the nozzle. At the same time, the air cylinder atomized water control valve is automatically opened to inject atomized water into the air cylinder. The PLC controller monitors the feedback value of the data signal of the oxygen gas / hydrogen gas flow sensor in the circulating medium pipe in real time, and by controlling the oxygen gas branch pipe control valve, adjusts the content of trace hydrogen gas and oxygen gas in the circulating medium to ensure that hydrogen gas and oxygen gas always burn in an optimal state, which is step 2). Based on the feedback values of the data signals of the hydrogen gas flow sensor, the circulating medium pressure sensor, the oxygen gas flow sensor, and the oxygen gas / hydrogen gas flow sensor in the operation mode of the air cylinder assembly, the PLC controller automatically controls each control valve according to the feedback value of the hydrogen gas flow sensor, adjusts the flow rates of oxygen gas, the circulating medium, and atomized water, and operates the engine in a stable mode, which is step 3). The PLC controller continuously monitors the engine operation mode in real time, automatically adjusts the opening degree of the intake branch pipe atomized water control valve, and injects atomized water into the intake branch pipe, which is step 4). The circulating medium in the engine air cylinder continuously circulates according to steps 1), 2), 3), and 4). By continuously adjusting the hydrogen gas injection amount of the nozzle by the hydrogen-oxygen circulation engine, it is realized that the torque is large when the low-speed load is large during operation and the torque is small when the high-speed load is small. Based on the feedback value of the data signal of the temperature sensor in the exhaust gas pipe in the operation mode of the air cylinder assembly, the PLC controller monitors the temperature value of the circulating medium in real time to ensure the stability of the engine operation temperature, which is step 5). In this hydrogen-oxygen circulation engine, when the oxygen gas in the oxygen gas storage tank is about to run out, the oxygen gas pressure sensor sends out a signal. At this time, the PLC controller automatically opens the air control valve, closes the oxygen gas shut-off valve, and automatically switches to the air-assisted combustion mode. At the same time, it closes the circulation medium pipe control valve. Part of the water vapor generated by the engine condenses into water in the condenser through the condensate pipe and enters the water storage tank, where it is recycled as atomized water. Part of it does not perform water vapor circulation and is discharged into the atmosphere through the exhaust gas discharge control valve. This is step 6), When the engine stops, first close the hydrogen gas control valve to stop the hydrogen gas supply. At the same time, close the oxygen gas control valve and delay closing the circulating water vapor control valve. Bring the remaining hydrogen gas and oxygen gas in the engine mixing pipe into the air cylinder through the circulating medium and burn them all completely, solving the problem of hydrogen gas and oxygen gas remaining in the engine pipe leaking into the air cylinder. This is step 6), In this hydrogen-oxygen circulation engine, a hydrogen gas pressure sensor is installed on the hydrogen gas pipe. When the hydrogen gas pressure is lower than the set value, it sends out an alarm signal to remind of the need to replenish hydrogen gas. This is step 7), In the hydrogen-oxygen circulation engine, automatic traps are provided in both the exhaust gas discharge pipe and the medium circulation pipe. During the operation of the engine, the condensate water in the pipe is automatically discharged through the trap. This is step 8), In the hydrogen-oxygen circulation engine, an automatic drain valve, an overflow valve, and a temperature sensor are provided in the water storage tank. After the engine stops operating, the PLC controller monitors the feedback value of the temperature sensor. When the temperature value reaches the freezing point, all the water in the water storage tank is automatically discharged. This is step 9), In the hydrogen-oxygen circulation engine, an emergency shut-off valve, an inertia switch, and a pressure lower limit interlock alarm device are provided on the hydrogen gas pipe and the oxygen gas pipe, and a temperature upper limit interlock alarm device is installed on the circulation medium pipe. In the emergency mode where the pressure of oxygen gas and hydrogen gas is lower than the set value, the temperature of the circulation medium is higher than the set value, an impact occurs, or the hydrogen-oxygen circulation engine ignites, the supply of hydrogen gas and oxygen gas is blocked in real time to ensure the safe operation of the engine. This includes step 10).

[0030] The operation modes of the air cylinder assembly include an operation and stop mode, an acceleration mode, a deceleration mode, an idle mode, and an air mode.

[0031] The description of the above embodiments is for those skilled in the art to easily understand and apply the present invention. It is obvious that those skilled in the art can easily modify these embodiments without creative labor and apply the general principles described herein to other embodiments. Therefore, the present invention is not limited to the embodiments herein, and all improvements and modifications made by those skilled in the art without departing from the scope of the present invention in accordance with the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. A hydrogen-oxygen circulation engine, The hydrogen-oxygen circulation engine includes an air cylinder assembly, a hydrogen gas supply assembly, an oxygen gas supply assembly, a circulation medium assembly, an atomized water assembly, a condensed water recovery assembly including condensed water attached to a water storage tank, and a control system. The air cylinder assembly includes an air cylinder body (1), a first intake branch pipe (2), an intake valve (3), an exhaust valve (4), an exhaust branch pipe (5), a nozzle (6), a piston (7), a link (8), and a crankshaft (9). The piston is transmission-connected to the crankshaft via the link. The piston is installed inside the air cylinder body. The topmost part of the air cylinder body is connected to the intake valve, the exhaust valve, and the nozzle respectively. One end of the first intake branch pipe is connected to the intake valve, and one end of the exhaust branch pipe is connected to the exhaust valve. The hydrogen gas supply assembly includes a hydrogen gas storage tank (10), a hydrogen gas flame arrester (11), and a hydrogen gas pipe (12). Both ends of the hydrogen gas pipe are connected to the hydrogen gas storage tank and the nozzle respectively. The hydrogen gas flame arrester is installed at the connection point between the hydrogen gas storage tank and the hydrogen gas pipe. The oxygen gas supply assembly includes an oxygen gas storage tank (13), an oxygen gas intake header pipe (14), and an oxygen gas intake branch pipe (15). One end of the oxygen gas intake header pipe (14) is connected to the oxygen gas storage tank (13). One end of the oxygen gas intake branch pipe is connected to the oxygen gas intake header pipe. The atomized water assembly includes an atomized water storage tank (16), an air cylinder atomized water pipe (17), an intake branch pipe atomized water pipe (18), and a transport pump (19). Both ends of the intake branch pipe atomized water pipe are respectively connected to the atomized water storage tank and the first intake branch pipe. One end of the air cylinder atomized water pipe is connected to the intake branch pipe atomized water pipe, and the other end is connected to the nozzle. The transport pump is attached to the connection point between the atomized water storage tank and the intake branch pipe atomized water pipe. The circulating medium assembly includes a circulating medium pipe (20), a circulating medium branch pipe (21), an intake header pipe (22), and an exhaust header pipe (23). Both ends of the circulating medium pipe are respectively connected to one end of the intake header pipe and one end of the exhaust header pipe. Both ends of the circulating medium branch pipe are respectively connected to the other end of the exhaust header pipe and the hydrogen gas pipe. The other end of the oxygen gas intake header pipe is connected to the intake header pipe. The other end of the oxygen gas intake branch pipe is connected to the intake header pipe. The other end of the intake header pipe is connected to the first intake branch pipe. The condensed water recovery assembly includes a condenser (24), a condensed water pipe (25), and a water storage tank. Both ends of the condensed water pipe (25) are respectively connected to one end of the condenser and the water storage tank. The other end of the condenser (24) is connected to the exhaust header pipe (23). The water storage tank communicates with the atomized water storage tank (16). An air intake pipe (26) is further attached to the intake header pipe, and an exhaust gas discharge pipe (27) connected to the exhaust header pipe is further attached to the exhaust header pipe. The control system includes a PLC controller (28), a man-machine interface, and a sensor assembly. The PLC controller is connected to the man-machine interface and the sensor assembly respectively. The sensor assembly includes a hydrogen gas flow sensor (29), a hydrogen gas pressure sensor (30), a hydrogen gas shut-off valve (31), and a hydrogen gas throttle control valve (32) attached to the hydrogen gas pipe, an air cylinder atomized water control valve (33) attached to the air cylinder atomized water pipe, a temperature sensor (34) attached to the exhaust header pipe, an oxygen gas pressure sensor (35), an oxygen gas flow sensor (36), and an oxygen gas flow control valve (37) attached to the oxygen gas header pipe. An oxygen gas branch flow control valve (38) attached to the oxygen gas intake branch pipe (15). A circulating medium pressure sensor (39) attached to the intake header pipe, an oxygen gas / hydrogen gas content sensor (40) attached to the circulating medium pipe, a circulating medium control valve (41), an air intake control valve (42) attached to the air intake pipe, an exhaust gas discharge control valve (43) attached to the exhaust gas discharge pipe, and a branch pipe flow control valve (44) attached to the circulating medium branch pipe. All the above sensors are connected to the PLC controller via data signals. The PLC controller (28) is connected to output control signals to each valve. A hydrogen-oxygen circulation engine, characterized in that.

2. An exhaust gas discharge safety valve (45) and an exhaust gas discharge pipe trap (46) are further attached to the exhaust gas discharge pipe. An intake header pipe trap (49) connected to the PLC controller is further attached to the other end of the intake header pipe. The hydrogen-oxygen circulation engine according to claim 1, characterized in that.

3. A filter (50) is attached to the air intake pipe, an air cylinder atomized water control valve (51) connected to a PLC controller is further attached to the air cylinder atomized water pipe, and an oxygen gas shut-off valve (52) is further attached to the oxygen gas header pipe. The hydrogen-oxygen circulation engine according to claim 1, characterized in that.

4. The medium in the circulation medium assembly is water vapor. The hydrogen-oxygen circulation engine uses hydrogen gas as fuel and oxygen gas as an oxidizer. The components of the exhaust gas after engine combustion are H ２ O. The hydrogen-oxygen circulation engine according to claim 1, characterized in that.

5. The hydrogen-oxygen circulation engine is controlled using the flow rate ratio of oxygen gas and hydrogen gas. The PLC controller adjusts the oxygen gas supply amount based on the data signal of the hydrogen gas flow rate sensor to achieve the adjustment of the combustion ratio of hydrogen gas and oxygen gas. The hydrogen-oxygen circulation engine according to claim 1, characterized in that.

6. The PLC controller controls the oxygen gas branch pipe control valve based on the data signal fed back by the oxygen gas / hydrogen gas flow rate sensor in the circulation medium pipe to achieve fine adjustment of the oxygen gas and reach the optimal engine mode. The hydrogen-oxygen circulation engine according to claim 1, characterized in that.

7. Having two operating modes of oxygen gas assisted combustion and air assisted combustion that can be automatically switched. The hydrogen-oxygen circulation engine according to claim 1, characterized in that.

8. Used in the fields of vehicle internal combustion engines, marine internal combustion engines, and power generation internal combustion engines. The hydrogen-oxygen circulation engine according to claim 1, characterized in that.

9. A method of using the hydrogen-oxygen circulation engine according to any one of claims 1 to 3, Start the engine with the ignition switch, supply power to each component of the hydrogen-oxygen circulation engine. When the engine starts a cold start for the first time, the PLC controller first opens the air control valve to introduce starting air. Based on the feedback value of the data signal of the hydrogen gas flow sensor, the PLC controller controls the engine throttle to inject hydrogen gas into the air cylinder through the nozzle. Hydrogen gas and oxygen gas burn to push the piston, and further reciprocate the link and the crankshaft to do work. The water vapor formed after combustion passes through the exhaust valve and the exhaust branch pipe, then through the exhaust header pipe. Part of the water vapor enters the circulation pipe, is mixed with oxygen gas through the flow control valve, enters the air cylinder, is mixed with hydrogen gas and burns. Part of the water vapor passes through the condensate pipe, condenses into water in the condenser, enters the water storage tank, and is recycled as atomized water. Based on the feedback values of the data signals of the hydrogen gas flow sensor and the oxygen gas flow sensor, the PLC controller gradually opens the oxygen gas flow control valve to introduce oxygen gas and synchronously closes the air control valve slightly until it is closed, stopping the introduction of air. At this time, it enters the hydrogen gas-oxygen gas combustion stage, and the generated water vapor circulation medium is discharged to the atmosphere from the exhaust gas discharge pipe in the exhaust header pipe bypass. The PLC controller controls the exhaust gas discharge control valve based on the feedback value of the circulation medium pressure sensor to adjust the water vapor discharge amount. When the pressure of the circulation medium pipe rises to the safety set value, the exhaust gas discharge safety valve automatically opens to ensure the stability of the system pressure. Step 1) After the above step 1), based on the feedback values of the data signals of the oxygen gas flow sensor and the circulating medium pressure sensor in the operating mode of the air cylinder assembly, the PLC controller controls the oxygen gas header pipe control valve to introduce oxygen gas and the circulating medium into the air cylinder through the intake header pipe - intake branch pipe - intake valve, and controls the hydrogen gas throttle control valve and the circulating medium branch pipe control valve to introduce hydrogen gas and the circulating medium into the air cylinder through the hydrogen gas pipe, the circulating medium branch pipe, and the nozzle. At the same time, the air cylinder atomized water control valve is automatically opened to inject atomized water into the air cylinder. The PLC controller monitors the feedback value of the data signal of the oxygen gas / hydrogen gas flow sensor in the circulating medium pipe in real time and controls the oxygen gas branch pipe control valve to adjust the content of trace hydrogen gas and oxygen gas in the circulating medium to ensure that the hydrogen gas and oxygen gas always burn in an optimal state (step 2); Based on the feedback values of the data signals of the hydrogen gas flow sensor, the circulating medium pressure sensor, the oxygen gas flow sensor, and the oxygen gas / hydrogen gas flow sensor in the operating mode of the air cylinder assembly, the PLC controller automatically controls each control valve to adjust the flow rates of oxygen gas, the circulating medium, and atomized water to operate the engine in a stable mode (step 3); The PLC controller (28) monitors the engine operating mode in real time and automatically adjusts the opening degree of the intake branch pipe atomized water control valve to inject atomized water into the intake branch pipe (step 4); The circulating medium in the engine air cylinder circulates continuously according to steps 1), 2), 3), and 4). By continuously adjusting the hydrogen gas injection amount of the nozzle of the hydrogen-oxygen circulation engine, it realizes that the torque is large when the low-speed load is large during operation and the torque is small when the high-speed load is small. Based on the feedback value of the data signal of the temperature sensor in the exhaust gas pipe in the operating mode of the air cylinder assembly, the PLC controller monitors the temperature value of the circulating medium in real time to ensure the stability of the engine operating temperature (step 5); In the hydrogen-oxygen circulation engine, when the oxygen gas in the oxygen gas storage tank is about to run out, the oxygen gas pressure sensor sends a signal. At this time, the PLC controller automatically opens the air control valve, closes the oxygen gas shut-off valve, and automatically switches to the air-assisted combustion mode. At the same time, it closes the circulation medium pipe control valve. Part of the water vapor generated by the engine condenses into water in the condenser through the condensate pipe and enters the water storage tank (16) to be recycled as atomized water. Part of it does not perform water vapor circulation and is discharged into the atmosphere through the exhaust gas discharge control valve. Step 6) In the hydrogen-oxygen circulation engine, a hydrogen gas pressure sensor is installed on the hydrogen gas pipe. When the hydrogen gas pressure is lower than the set value, it sends an alarm signal to alert for the replenishment of hydrogen gas. Step 7) In the hydrogen-oxygen circulation engine, automatic traps are provided in both the exhaust gas discharge pipe and the medium circulation pipe. During the operation of the engine, the condensate water in the pipes is automatically discharged through the traps. Step 8) In the hydrogen-oxygen circulation engine, an automatic drain valve, an overflow valve, and a temperature sensor are provided in the water storage tank. After the engine stops operating, the PLC controller monitors the feedback value of the temperature sensor. When the temperature value reaches the freezing point, it automatically discharges all the water in the water storage tank. Step 9) In the hydrogen-oxygen circulation engine, emergency shut-off valves, inertia switches, and pressure lower limit interlock alarm devices are provided on the hydrogen gas pipe and the oxygen gas pipe. A temperature upper limit interlock alarm device is installed on the circulation medium pipe. In the emergency mode where the pressure of the oxygen gas and hydrogen gas is lower than the set value, the temperature of the circulation medium is higher than the set value, an impact occurs, or the hydrogen-oxygen circulation engine ignites, the supply of hydrogen gas and oxygen gas is cut off in real time to ensure the safe operation of the engine. Step 10) A method for using a hydrogen-oxygen circulation engine, characterized by the above.

10. The operating mode of the air cylinder assembly includes an operating and a stop mode. In the acceleration mode, deceleration mode, idle mode, and air mode, the PLC controller (28) controls the flow rates and ratios of hydrogen gas, oxygen gas, atomized water, and the circulation medium differently to operate the engine. A method for using a hydrogen-oxygen circulation engine according to claim 9, characterized in that.

11. When the engine stops, first close the hydrogen gas control valve to stop the hydrogen gas supply. At the same time, close the oxygen gas control valve and delay closing the circulating water vapor control valve. Bring the hydrogen gas and oxygen gas remaining in the engine mixing pipe with the circulation medium into the air cylinder so that all of them can burn out. A method for using a hydrogen-oxygen circulation engine according to claim 9, characterized in that.

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