Ceramic engine taking green hydrogen methanol as fuel

Abstract

The invention relates to the technical field of engines, in particular to a ceramic engine with green hydrogen methanol as fuel. Comprising at least one cylinder body and a cylinder cover correspondingly matched with the cylinder body, a combustion chamber is arranged between the cylinder body and the cylinder cover, the cylinder cover seals the combustion chamber from the top, an air inlet and an air outlet are formed in one side of the cylinder cover, the air outlet is higher than the air inlet, and a spark plug and an oil nozzle are arranged on the cylinder cover; a piston and a crankshaft connecting rod mechanism are arranged at the bottom of the combustion chamber; an output shaft synchronously rotating with a crankshaft connecting rod is arranged on one side of the cylinder body; a zirconia ceramic layer is arranged on the inner wall in the combustion chamber, and the piston is made of zirconia ceramic materials. The zirconium oxide ceramic layer is arranged on the key part, making contact with fuel, of the engine or the zirconium oxide ceramic material is directly adopted, so that the hydrogen embrittlement phenomenon is effectively avoided. The hydrogen brittleness resistance, the high temperature resistance and the structural stability of the engine can be remarkably improved, and the service life of a piston, a cylinder cover and other components can be effectively prolonged.

Description

Technical Field

[0001] The present invention relates to the field of engine technology, in particular to a ceramic engine using green hydrogen methanol as fuel. Background Art

[0002] Green hydrogen methanol is a low-carbon fuel synthesized from green hydrogen produced through the electrolysis of water using renewable energy, combined with captured carbon dioxide. Its production process emits zero carbon emissions, and its carbon footprint over its entire lifecycle is close to zero, making it considered a valuable alternative to traditional fossil fuels.

[0003] During the combustion of green hydrogen methanol fuel, hydrogen atoms easily penetrate the metal lattice, causing a decrease in material toughness and an increase in brittleness, resulting in hydrogen embrittlement. Hydrogen embrittlement can trigger microcracks to propagate, particularly affecting components such as pistons and cylinders made of high-strength steel and titanium alloys. This can reduce fatigue resistance, shorten service life, and even cause sudden brittle fracture, threatening operational safety.

[0004] Existing solutions rely on nickel-based alloys, but this approach is costly and cannot completely block hydrogen penetration. In addition, the localized high temperatures generated by hydrogen fuel combustion further exacerbate oxidation and creep damage in metal materials.

[0005] Therefore, there is an urgent need for a ceramic engine that is resistant to hydrogen embrittlement, high temperature resistant and structurally stable. Summary of the Invention

[0006] The present invention aims to provide a ceramic engine that uses green hydrogen methanol as fuel. By providing a zirconium oxide ceramic layer on the parts of the engine that come into contact with the fuel or using zirconium oxide ceramics, hydrogen embrittlement can be avoided, the stability of the engine operation can be improved, and the engine life can be extended.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A ceramic engine using green hydrogen methanol as fuel, comprising at least one cylinder block and a cylinder head corresponding to the cylinder block, a combustion chamber being provided between the cylinder block and the cylinder head, the cylinder head sealing the combustion chamber from the top, an air intake and an exhaust port being provided on one side of the cylinder head, the exhaust port being higher than the air intake port, and a spark plug and a fuel injector being provided on the cylinder head;

[0009] The bottom of the combustion chamber is provided with a piston and a crankshaft connecting rod mechanism, and one side of the cylinder body is provided with an output shaft that rotates synchronously with the crankshaft connecting rod;

[0010] A zirconium oxide ceramic layer is provided on the inner wall of the combustion chamber, and the piston is made of zirconium oxide ceramic material.

[0011] As an improvement, the cylinder head is made of zirconium oxide ceramic material.

[0012] As an improvement, the spark plug extends through the cylinder head into the combustion chamber, and the ignition end of the spark plug adopts a zirconium oxide ceramic ignition head.

[0013] As an improvement, the piston is provided with a plurality of annular sealing grooves, and ceramic sealing rings are installed in the sealing grooves.

[0014] As an improvement, the cylinder cover is provided with a heat sink.

[0015] As an improvement, the crankshaft connecting rod includes a crankshaft and a connecting rod, and both ends of the connecting rod are hinged to the bottom of the piston and the crankshaft respectively.

[0016] As an improvement, the fuel injector is arranged on the cylinder head, which is provided with a mounting hole. The fuel injector is sealed and connected to the cylinder head through the mounting hole. The fuel injector is inserted into the cylinder head and is provided with a nozzle. The nozzle is made of zirconia ceramic.

[0017] As an improvement, an air intake boost component is provided at the air intake.

[0018] The advantages of the present invention are:

[0019] 1. This invention effectively prevents hydrogen embrittlement by applying a zirconia ceramic layer or directly using zirconia ceramic materials on key engine components that come into contact with the fuel. This significantly improves the engine's hydrogen embrittlement resistance, high-temperature resistance, and structural stability, effectively extending the service life of components such as the piston and cylinder head. It also enhances the engine's operational safety under high-temperature and high-pressure conditions, thereby addressing the vulnerability of traditional metal materials to damage in the green hydrogen and methanol combustion environment.

[0020] 2. This invention utilizes a two-stroke engine, which features a simple structure, high power density, high combustion efficiency, and excellent starting performance. It is particularly well-suited for applications requiring lightweight, high-power output. By optimizing the combustion chamber design and fuel injection system, this invention further enhances fuel combustion efficiency, meeting environmental requirements.

[0021] 3. The engine of this invention uses green hydrogen methanol as fuel. Combustion of green hydrogen methanol primarily produces water vapor and a small amount of carbon dioxide, significantly reducing harmful emissions compared to traditional fuels. Two-stroke engines have high combustion efficiency. Combined with the use of zirconia ceramics, they better adapt to the characteristics of green hydrogen methanol fuel, further ensuring complete combustion and reducing incomplete combustion products. This allows the engine to achieve true zero-pollution emissions during operation, contributing to the development of environmental protection and aligning with current green energy concepts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of a ceramic engine using green hydrogen methanol as fuel in Example 1.

[0023] Figure 2This is an explosion diagram of a ceramic engine using green hydrogen methanol as fuel in Example 1.

[0024] Figure 3 This is a diagram of the internal structure of a ceramic engine using green hydrogen methanol as fuel in Example 1.

[0025] Figure 4 This is an explosion diagram of the piston in a ceramic engine using green hydrogen methanol as fuel in Example 1.

[0026] Indicated in the figure:

[0027] 1. Cylinder block; 2. Cylinder head; 3. Combustion chamber; 4. Intake port; 5. Exhaust port; 6. Spark plug; 7. Fuel injector; 8. Piston; 9. Crankshaft-connecting rod mechanism; 10. Output shaft; 11. Zirconia ceramic layer; 12. Zirconia ceramic ignition head; 13. Sealing groove; 14. Ceramic sealing ring; 15. Heat sink; 16. Crankshaft; 17. Connecting rod; 18. Mounting hole; 19. Nozzle; 20-Supercharger assembly. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Example 1

[0030] This embodiment discloses a ceramic engine using green hydrogen methanol as fuel. Figure 1 and Figure 2 As shown, it includes at least one cylinder block 1 and a cylinder head 2 corresponding to the cylinder block 1, a combustion chamber 3 is provided between the cylinder block 1 and the cylinder head 2, the cylinder head 2 seals the combustion chamber 3 from the top, an air intake port 4 and an exhaust port 5 are provided on one side of the cylinder head 2, the height of the exhaust port 5 is higher than the air intake port 4, and a spark plug 6 and a fuel injector 7 are provided on the cylinder head 2.

[0031] like Figure 3 As shown, the spark plug 6 extends through the cylinder head 2 into the combustion chamber 3. The ignition end of the spark plug 6 utilizes a zirconia ceramic ignition tip 12. A fuel injector 7 is mounted on the cylinder head 2, with a mounting hole 18 provided therein. The fuel injector 7 is sealed to the cylinder head 2 through the mounting hole 18. The portion of the fuel injector 7 inserted into the cylinder head 2 is provided with a nozzle 19, which is made of zirconia ceramic. The cylinder head 2 is also made of zirconia ceramic. A heat sink 15 is also provided on the cylinder head 2.

[0032] Traditional engines often use high-strength steel. During the combustion of green hydrogen methanol fuel, hydrogen atoms easily penetrate the metal lattice, causing the material to lose toughness and increase brittleness, resulting in hydrogen embrittlement. The present invention places zirconia ceramics or zirconia ceramic layers in locations most likely to come into contact with green hydrogen methanol fuel, effectively preventing hydrogen embrittlement and extending the engine's service life.

[0033] like Figure 3 and Figure 4 As shown, a piston 8 and a crankshaft connecting rod mechanism 9 are installed at the bottom of the combustion chamber 3. An output shaft 10 is installed on one side of the cylinder body 1 to rotate synchronously with the crankshaft connecting rod mechanism 9. The inner wall of the combustion chamber 3 is provided with a zirconia ceramic layer 11. The piston 8 is made of zirconia ceramic. The piston 8 is provided with multiple annular sealing grooves 13, and ceramic sealing rings 14 are installed in the sealing grooves 13.

[0034] The crankshaft-connecting rod mechanism 9 includes a crankshaft 16 and a connecting rod 17 , and both ends of the connecting rod 17 are hinged to the bottom of the piston 8 and the crankshaft 16 respectively.

[0035] This invention uses a two-stroke engine as its prototype. The cylinder head 2, air intake 4, and exhaust port 5 are integrated into a single design, and the cylinder utilizes direct fuel injection and spark ignition. A supercharger assembly 20 is also located at the air intake 4 to ensure thorough mixing of fuel and air within the combustion chamber 3. The cylinder head 2 is equipped with heat sinks 15 for air cooling. Compared to traditional four-stroke engines, this invention simplifies their complex structure while leveraging the inherent characteristics of zirconia ceramics to improve combustion efficiency and service life.

[0036] The workflow of this embodiment is described as follows:

[0037] First stroke: When the engine starts to work, the piston 8 is at the top dead center, and the oil-gas mixture is compressed by the piston 8 in the combustion chamber 3. At this time, the spark plug 6 ignites, the oil-gas mixture in the combustion chamber 3 is ignited and pushes the piston 8 to move downward to start working. Since the exhaust port 5 is above the intake port 4, the exhaust port 5 is opened first when the piston 8 moves downward. The exhaust gas generated by the combustion is discharged from the exhaust port 5. As the piston 8 moves further downward, the intake port 4 opens. Since the present invention adopts intake supercharging technology, external air enters the combustion chamber 3 under the action of the supercharging component 20 and further empties the exhaust gas in the combustion chamber 3, so that the combustion chamber 3 is filled with new air.

[0038] Second Stroke: As piston 8 begins its upward movement, it sequentially closes intake port 4 and exhaust port 5, compressing the air within combustion chamber 3. As piston 8 approaches top dead center, fuel injector 7 injects green hydrogen methanol fuel directly into combustion chamber 3, where it mixes thoroughly with the compressed air. Spark plug 6 generates an electric spark, igniting the fuel-air mixture. This mixture rapidly burns, releasing a significant amount of heat energy, expanding the volume of the gas within the combustion chamber and pushing piston 8 downward. The crankshaft-connecting rod mechanism 9 converts the linear motion of piston 8 into rotational motion of crankshaft 16, generating power output.

[0039] The engine of this invention uses green hydrogen methanol as fuel. Combustion of green hydrogen methanol primarily produces water vapor and a small amount of carbon dioxide, significantly reducing harmful emissions compared to traditional fuels. The two-stroke engine boasts high combustion efficiency. Combined with the use of zirconia ceramic, it better adapts to the characteristics of green hydrogen methanol fuel, further ensuring complete combustion and reducing incomplete combustion products. This allows the engine to achieve zero pollution emissions during operation, contributing to the development of environmental protection and aligning with current green energy concepts.

[0040] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A ceramic engine using green hydrogen methanol as fuel, characterized in that: The invention comprises at least one cylinder body (1) and a cylinder head (2) corresponding to the cylinder body (1); a combustion chamber (3) is provided between the cylinder body (1) and the cylinder head (2); the cylinder head (2) seals the combustion chamber (3) from the top; an air inlet (4) and an exhaust port (5) are provided on one side of the cylinder head (2); the height of the exhaust port (5) is higher than that of the air inlet (4); and a spark plug (6) and a fuel injection nozzle (7) are provided on the cylinder head (2); A piston (8) and a crankshaft connecting rod mechanism (9) are provided at the bottom of the combustion chamber (3), and an output shaft (10) that rotates synchronously with the crankshaft connecting rod mechanism (9) is provided on one side of the cylinder body (1); A zirconium oxide ceramic layer (11) is provided on the inner wall of the combustion chamber (3), and the piston (8) is made of zirconium oxide ceramic material.

2. A ceramic engine using green hydrogen methanol as fuel according to claim 1, characterized in that: The cylinder cover (2) is made of zirconium oxide ceramic material.

3. A ceramic engine using green hydrogen methanol as fuel according to claim 2, characterized in that: The spark plug (6) passes through the cylinder cover (2) and extends into the combustion chamber (3). The ignition end of the spark plug (6) adopts a zirconium oxide ceramic ignition head (12).

4. The ceramic engine using green hydrogen methanol as fuel according to claim 1, characterized in that: A plurality of annular sealing grooves (13) are provided on the piston (8), and ceramic sealing rings (14) are installed in the sealing grooves (13).

5. The ceramic engine using green hydrogen methanol as fuel according to claim 1, characterized in that: The cylinder cover (2) is provided with a heat sink (15).

6. The ceramic engine using green hydrogen methanol as fuel according to claim 1, characterized in that: The crankshaft-connecting rod mechanism (9) comprises a crankshaft (16) and a connecting rod (17), and both ends of the connecting rod (17) are respectively hinged to the bottom of the piston (8) and the crankshaft (16).

7. The ceramic engine using green hydrogen methanol as fuel according to claim 1, characterized in that: The fuel injection nozzle (7) is arranged on the cylinder head (2), and a mounting hole (18) is provided on the cylinder head (2). The fuel injection nozzle (7) is sealedly connected to the cylinder head (2) through the mounting hole (18). The fuel injection nozzle (7) is inserted into the cylinder head (2) and is provided with a nozzle (19). The nozzle (19) is made of zirconium oxide ceramic material.

8. The ceramic engine using green hydrogen methanol as fuel according to claim 1, characterized in that: An air intake boosting component (20) is provided at the air intake.

Images