Methanol gasification device of single-cylinder electronic fuel injection engine

Abstract

The utility model discloses a methanol gasification device of a single-cylinder electronic fuel injection engine, which comprises a methanol supply system, a methanol gasification generator and a methanol steam injection system which are sequentially connected, the methanol supply system comprises a methanol box and a methanol pump, and the methanol gasification generator comprises a gasification box and a heating and preheating assembly. The methanol steam injection system comprises a gas storage tank and an oil nozzle. According to the single-cylinder electronic fuel injection engine, the problems of cold start and combustion are effectively solved, methanol is gasified in advance, so that when the single-cylinder electronic fuel injection engine is started, gasified methanol fuel enters an air cylinder and is more easily mixed with air to form combustible mixed gas, and the cold start performance of the engine is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of engine fuel gasification, especially relates to a methanol gasification device of single cylinder electronic injection engine. BACKGROUND

[0002] Under the background of actively promoting the "double carbon" goal in China, methanol fuel power has become a key promotion project. Numerous enterprises focus on the transformation of vehicle gasoline and diesel engines to methanol power, but ignore the huge group of single cylinder gasoline and diesel power equipment. Taking widely used small gasoline engines and motorcycles as examples, the emission problem needs to be solved, and promoting methanol power is one of the effective ways.

[0003] However, the single cylinder gasoline engine promotes methanol power and faces the key problems of cold start difficulty and insufficient combustion. The traditional single cylinder engine preheating system is complex, and usually starts the heating and gasification process a few milliseconds before the fuel injection nozzle acts, which requires an additional set of control system linked with the engine control unit (ECU). Not only does it increase the complexity of the product structure, but also significantly increases the production cost, which seriously hinders the marketization process of methanol power in the field of single cylinder engine. In addition, the fuel supply system of single cylinder gasoline engine has its own characteristics. It has no oil rail, and the oil pump is almost directly connected with the fuel injection nozzle, making it difficult for traditional methanol gasification technology to adapt. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a methanol gasification device of single cylinder electronic injection engine to solve the technical problems proposed in the background art.

[0005] To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows: a methanol gasification device of single cylinder electronic injection engine, comprising a methanol supply system, a methanol gasification generator and a methanol vapor injection system connected in sequence, the methanol supply system comprises a methanol tank and a methanol pump, the methanol gasification generator comprises a gasification tank and a heating and preheating assembly, and the methanol vapor injection system comprises a gas storage tank and a fuel injection nozzle.

[0006] Preferably, the outlet of the methanol tank is connected with the methanol pump through a pipeline, and the methanol pump is connected with the gasification tank through a pipeline.

[0007] Preferably, a filter is arranged on the pipeline connecting the methanol tank and the methanol pump.

[0008] Preferably, the inlet of the gasification tank is provided with an atomizing nozzle, and a temperature sensor is arranged in the gasification tank.

[0009] Preferably, the heating and preheating assembly is arranged on the outer side of the gasification tank.

[0010] Preferably, a diaphragm gas pump is arranged on the pipeline connecting the gasification tank and the gas storage tank.

[0011] Preferably, a preheating device is provided on the outside of the gas storage tank, and a pressure sensor is provided on the preheating device.

[0012] The methanol vaporization device for a single-cylinder electronic fuel injection engine of this invention has the following advantages:

[0013] 1. This utility model effectively solves the problems of cold start and combustion. By pre-vaporizing methanol, the methanol fuel entering the cylinder when the single-cylinder electronic fuel injection engine starts is vaporized methanol fuel, which is easier to mix with air to form a combustible mixture, greatly improving the engine's cold start performance. At the same time, the vaporized methanol fuel can burn more completely in the cylinder, reducing the emission of incomplete combustion products, improving combustion efficiency, and reducing pollutant emissions.

[0014] 2. This utility model simplifies the system structure and reduces costs. It eliminates the need for a complex control system linked to the ECU. It only requires the addition of a simple vaporization box between the oil pump and the fuel injector, and uses pressure and temperature sensors in conjunction with the control unit to control the heating and preheating components and preheating device. This simplifies the structure of the entire preheating system, reduces the number of parts and system complexity, thereby effectively reducing product costs and facilitating the market promotion of methanol power in the field of single-cylinder engines.

[0015] 3. This utility model is adapted to the fuel system of a single-cylinder engine. It is designed for the characteristics of a single-cylinder gasoline engine where the fuel pump and injector are directly connected and there is no fuel rail. This methanol vaporization device can be seamlessly integrated into the existing fuel supply system without the need for large-scale modification of the engine fuel system, and has good adaptability and versatility. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] The markings in the diagram are as follows: 1. Methanol tank; 2. Methanol pump; 3. Atomizing nozzle; 4. Vaporization box; 5. Temperature sensor; 6. Preheating device; 7. Fuel injector; 8. Gas storage tank; 9. Pressure sensor; 10. Diaphragm air pump; 11. Heating and preheating components. Detailed Implementation

[0019] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0020] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0021] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a methanol vaporization device for a single-cylinder electronic fuel injection engine.

[0022] like Figure 1 As shown, this utility model discloses a methanol vaporization device for a single-cylinder electronic fuel injection engine, comprising a methanol supply system, a methanol vaporization generator, and a methanol vapor injection system connected in sequence. The methanol supply system includes a methanol tank 1 and a methanol pump 2. A filter is installed on the pipeline connecting the methanol tank 1 and the methanol pump 2. The methanol supply system is used to supply methanol and deliver it to the methanol vaporization generator. The methanol vaporization generator includes a vaporization chamber 4 and a heating and preheating component 11. The heating and preheating component 11 is located on the outside of the vaporization chamber 4. An atomizing nozzle 3 is installed at the inlet of the vaporization chamber 4, and a temperature sensor 5 is installed inside the vaporization chamber 4 to monitor the temperature data inside the vaporization chamber 4 in real time. The outlet of the methanol tank 1 is connected to the methanol pump 2 through a pipeline, and the methanol pump 2 is connected to the vaporization chamber 4 through a pipeline. The methanol vapor injection system includes a gas storage tank 8 and a fuel injector 7. A diaphragm pump 10 is installed on the pipeline connecting the vaporization box 4 and the gas storage tank 8. A methanol gas rail is installed on the pipeline connecting the gas storage tank 8 and the fuel injector 7. A pressure regulating valve is installed on the pipeline connecting the methanol gas rail and the gas storage tank 8 to stabilize the injection pressure of methanol vapor and avoid inaccurate injection volume due to pressure fluctuations. The inlet end of the methanol gas rail is directly connected to the outlet end of the pressure regulating valve to receive the stabilized methanol vapor, and the outlet end is connected to the fuel injector 7. A preheating device 6 is installed on the outside of the gas storage tank 8, and a pressure sensor 9 is installed on the preheating device 6 to monitor the pressure data inside the gas storage tank 8 in real time.

[0023] The device also includes a control unit. Pressure sensor 9, temperature sensor 5, heating and preheating assembly 11, and preheating device 6 are all electrically connected to the control unit. Based on data from pressure sensor 9 and temperature sensor 5, the control unit precisely controls the heating temperature and heating time. When temperature sensor 5 detects that the temperature inside the vaporization tank 4 is lower than the set vaporization temperature threshold, the control unit activates the heating and preheating assembly 11 to heat the methanol fuel. When pressure sensor 9 detects that the pressure inside the gas storage tank 8 reaches the set pressure threshold, the control unit adjusts the heating power of the preheating device 6 to ensure that the methanol fuel is fully vaporized under suitable temperature and pressure conditions.

[0024] Preferably, a gas-liquid separator and its components are provided. The gas-liquid separator is located between the vaporization tank 4 and the diaphragm pump 10. The vaporized methanol is pumped to the gas storage tank 8 by the diaphragm pump 10, and the unvaporized methanol is pumped back to the methanol tank 1 by the gas-liquid separator. The gas-liquid separator and its components are prior art and will not be described in detail here.

[0025] Methanol pump 2 delivers methanol from methanol tank 1 to methanol vaporization generator. In the generator, methanol is atomized through atomizing nozzle 3 and then vaporized using waste heat from the engine cooling pipes or exhaust pipe. Unvaporized methanol is separated by a gas-liquid separator, and the vaporized methanol vapor enters the storage tank 8 for storage. Finally, it is injected into the engine's intake manifolds through fuel injectors 7. When the engine is in a cold start or when waste heat is insufficient, the electrically heated vaporization section can supplement the process by heating and vaporizing methanol to ensure normal vaporization and supply.

[0026] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A methanol vaporization device for a single-cylinder electronic fuel injection engine, characterized in that: It includes a methanol supply system, a methanol vaporization generator, and a methanol vapor injection system connected in sequence; wherein, The methanol supply system includes a methanol tank (1) and a methanol pump (2); The methanol vaporization generator includes a vaporization box (4) and a heating and preheating assembly (11); The methanol vapor injection system includes a gas storage tank (8) and a fuel injector (7).

2. The methanol vaporization device for a single-cylinder electronic fuel injection engine according to claim 1, characterized in that: The outlet of the methanol tank (1) is connected to the methanol pump (2) via a pipeline, and the methanol pump (2) is connected to the vaporization tank (4) via a pipeline.

3. The methanol vaporization device for a single-cylinder electronic fuel injection engine according to claim 1, characterized in that: A filter is installed on the pipeline connecting the methanol tank (1) and the methanol pump (2).

4. The methanol vaporization device for a single-cylinder electronic fuel injection engine according to claim 1, characterized in that: The vaporization box (4) is equipped with an atomizing nozzle (3) at its inlet, and a temperature sensor (5) is installed inside the vaporization box (4).

5. A methanol vaporization device for a single-cylinder electronic fuel injection engine according to claim 1, characterized in that: The heating and preheating assembly (11) is located on the outside of the vaporization box (4).

6. The methanol vaporization device for a single-cylinder electronic fuel injection engine according to claim 1, characterized in that: A diaphragm air pump (10) is installed on the pipeline connecting the gasification box (4) and the gas storage tank (8).

7. A methanol vaporization device for a single-cylinder electronic fuel injection engine according to claim 1, characterized in that: A preheating device (6) is provided on the outside of the gas storage tank (8), and a pressure sensor (9) is provided on the preheating device (6).

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