Fuel injection device, engine, and vehicle

Abstract

The utility model belongs to vehicle technical field discloses a fuel injection device, engine and vehicle. This fuel injection device includes injection valve body and nozzle structure injection valve body is provided with impact airflow channel and liquid fuel channel, and impact airflow can flow in the impact airflow channel, and liquid fuel can flow in the liquid fuel channel. The nozzle structure is provided with the flow channel that is communicated with the inlet channel of engine, the impact airflow channel and the liquid fuel channel all extend to the entrance of the nozzle structure, and the impact airflow can upstream impact atomization of the nozzle structure and the liquid fuel that flows out through the liquid fuel channel, and the atomized liquid fuel and impact airflow can enter the inlet channel through the flow channel. The fuel injection device can improve the uniformity of liquid fuel and air mixing, and improve the combustion efficiency.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a fuel injection device, engine and vehicle. Background Technology

[0002] Methanol engines and similar engines are generally equipped with fuel injection devices to inject fuels such as methanol into the engine's intake manifold to mix with air. The fuel-air mixture then enters the engine's combustion chamber for combustion.

[0003] Since methanol is liquid at room temperature and pressure, when the methanol injection pressure is low (5-10 bar), the methanol droplet size is relatively large (greater than 120 μm). When methanol mixes with air in the intake manifold, there is a risk of liquid methanol adhering to the walls, resulting in poor uniformity of methanol-air mixing, which in turn affects the combustion efficiency and power performance of the engine.

[0004] Therefore, there is an urgent need for a fuel injection device, engine, and vehicle to solve the above problems. Utility Model Content

[0005] According to one aspect of the present invention, the object is to provide a fuel injection device that can improve the uniformity of mixing liquid fuel and air, thereby increasing combustion efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Fuel injection device, including:

[0008] The injection valve body is provided with an impact airflow channel and a liquid fuel channel, wherein the impact airflow can flow in the impact airflow channel and the liquid fuel can flow in the liquid fuel channel;

[0009] The nozzle structure has a flow channel connected to the engine's air intake. The impinging airflow channel and the liquid fuel channel both extend toward the inlet of the nozzle structure. The impinging airflow can impact and atomize the liquid fuel flowing out through the liquid fuel channel upstream of the nozzle structure. The atomized liquid fuel and the impinging airflow can enter the air intake through the flow channel.

[0010] As a preferred embodiment of the fuel injection device provided by this utility model, there are multiple impact airflow channels, which are arranged in a circumferential array around the liquid fuel channel, and the outlets of the multiple impact airflow channels are arranged in a circumferential array at the outlet of the liquid fuel channel.

[0011] As a preferred embodiment of the fuel injection device provided by this utility model, the fuel injection device further includes a fuel pressurization valve, which is disposed at the outlet of the liquid fuel channel and configured to pressurize the liquid fuel at the outlet of the liquid fuel channel.

[0012] As a preferred embodiment of the fuel injection device provided by this utility model, the flow channel includes a converging section, a throat section, and a diverging section arranged in sequence. The impact airflow channel and the liquid fuel channel are both connected to the converging section, and the diverging section is connected to the air intake.

[0013] As a preferred embodiment of the fuel injection device provided by this utility model, the fuel injection device further includes a fixing cap, the nozzle structure is mated to the injection valve body, and the fixing cap is connected to the outer periphery of the injection valve body and the nozzle structure.

[0014] As a preferred embodiment of the fuel injection device provided by this utility model, the fuel injection device further includes an injection guide tube, which is connected to the nozzle structure and extends into the air intake.

[0015] As a preferred embodiment of the fuel injection device provided by this utility model, the injection inlet pipe is provided with multiple outlet channels.

[0016] As a preferred embodiment of the fuel injection device provided by this utility model, the injection inlet extends toward the inlet of the combustion chamber of the engine.

[0017] According to another aspect of the present invention, the object is to provide an engine comprising a cylinder head, a cylinder block, and a fuel injection device as described in any of the above embodiments, wherein a piston is disposed in the cylinder block, an intake passage is provided in the cylinder head, a combustion chamber is formed between the piston and the cylinder head, and a nozzle structure is connected to the intake passage, capable of injecting liquid fuel into the intake passage, and air and the liquid fuel are mixed in the intake passage and then enter the combustion chamber.

[0018] According to another aspect of the present invention, the object is to provide a vehicle comprising an engine as described above, the engine being configured to provide power to the vehicle.

[0019] The beneficial effects of this utility model are:

[0020] The fuel injection device provided by this utility model includes an injection valve body and a nozzle structure. The injection valve body is provided with an impact airflow channel and a liquid fuel channel. The impact airflow can flow in the impact airflow channel, and the liquid fuel can flow in the liquid fuel channel. The nozzle structure is provided with a flow channel connected to the engine's air intake. Both the impact airflow channel and the liquid fuel channel extend towards the inlet of the nozzle structure. The impact airflow can impact and atomize the liquid fuel flowing out through the liquid fuel channel upstream of the nozzle structure. The atomized liquid fuel and the impact airflow can enter the air intake through the flow channel. Through the above arrangement, the impact of the impact airflow on the liquid fuel can reduce the droplet size of the liquid fuel, improve the atomization effect, and reduce the possibility of liquid fuel adhering to the walls of the air intake due to excessively large liquid fuel droplets, thereby improving the uniformity of liquid fuel-air mixing and combustion efficiency.

[0021] The engine provided by this invention, by incorporating the aforementioned fuel injection device, can improve combustion efficiency and prevent knocking.

[0022] The vehicle provided by this utility model, by incorporating the aforementioned engine, can ensure the stability and reliability of its drive system. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the arrangement of the fuel injection device in the engine according to Embodiment 1 of this utility model;

[0025] Figure 2 This is a schematic diagram of the fuel injection device provided in Embodiment 1 of this utility model;

[0026] Figure 3 This is a schematic diagram of the fuel injection device provided in Embodiment 2 of this utility model;

[0027] Figure 4 This is a schematic diagram of the arrangement of the fuel injection device in the engine according to Embodiment 3 of this utility model.

[0028] In the picture:

[0029] 10. Air intake; 20. Combustion chamber;

[0030] 100. Injection valve body; 110. Impact airflow channel; 120. Liquid fuel channel; 130. Impact airflow inlet; 140. Liquid fuel inlet;

[0031] 200. Nozzle structure; 210. Flow channel; 211. Converging section; 212. Throat section; 213. Diverging section; 220. Nozzle body;

[0032] 300. Fuel pressurization valve;

[0033] 400. Fixing cap;

[0034] 500. Injection pipe. Detailed Implementation

[0035] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for 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 this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connect," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0044] Example 1

[0045] This embodiment provides a fuel injection device, an engine, and a vehicle.

[0046] Figure 1 This diagram shows a structural schematic of the fuel injection device provided in Embodiment 1 of the present invention arranged in an engine, with reference to... Figure 1 The engine provided in this embodiment includes a cylinder head, a cylinder block, and a fuel injection device provided in this embodiment. A piston is disposed in the cylinder block, and an intake manifold 10 is formed in the cylinder head, creating a combustion chamber 20 between the piston and the cylinder head. The fuel injection device injects atomized liquid fuel into the intake manifold 10, where the atomized liquid fuel mixes with air before entering the inlet of the combustion chamber 20. In this embodiment, the liquid fuel may specifically be liquid methanol.

[0047] The vehicle provided in this embodiment includes the engine described above, which is configured to provide power to the vehicle. By configuring the engine described above, the stability and reliability of the vehicle's driving can be guaranteed.

[0048] Figure 2 A schematic diagram of the fuel injection device provided in Embodiment 1 of this utility model is shown. (Refer to...) Figure 1 and Figure 2 The fuel injection device includes an injection valve body 100 and a nozzle structure 200. The injection valve body 100 is provided with an impingement airflow passage 110 and a liquid fuel passage 120. The impingement airflow can flow in the impingement airflow passage 110, and the liquid fuel can flow in the liquid fuel passage 120. The nozzle structure 200 is provided with a flow passage 210 communicating with the engine's intake duct 10. Both the impingement airflow passage 110 and the liquid fuel passage 120 extend toward the inlet of the nozzle structure 200. The impingement airflow can impinge and atomize the liquid fuel flowing out through the liquid fuel passage 120 upstream of the nozzle structure 200. The atomized liquid fuel and the impingement airflow can enter the intake duct 10 through the flow passage 210. Through the above configuration, the impact of the impinging airflow on the liquid fuel can reduce the droplet size of the liquid fuel, improving the atomization effect. Methanol droplets with a diameter of 150 μm are broken down into atomized methanol droplets with a diameter of less than 20 μm, reducing the possibility of liquid fuel adhering to the walls of the intake duct 10 due to excessively large droplets, thereby improving the uniformity of liquid fuel-air mixing and combustion efficiency. In this embodiment, the impinging airflow can specifically be high-pressure air.

[0049] Specifically, the injection valve body 100 is provided with an impact airflow inlet 130, which is connected to the impact airflow channel 110 and can be connected to an air source and a pressurizing device. The pressurizing device can pressurize the air to form high-pressure air so that the air has impact capability.

[0050] More specifically, the injection valve body 100 is also provided with a liquid fuel inlet 140, and the liquid fuel channel 120 is arranged along the axial direction of the injection valve body 100 and is connected to the liquid fuel inlet 140, which is connected to a liquid fuel source.

[0051] Preferably, there are multiple impact airflow channels 110, which are arranged in a circumferential array around the liquid fuel channel 120. The outlets of the multiple impact airflow channels 110 are evenly arranged in a circumferential array at the outlet of the liquid fuel channel 120. With the above arrangement, the liquid fuel flowing out of the outlet of the liquid fuel channel 120 can be impacted at multiple positions in the circumferential direction of the outlet of the liquid fuel channel 120, further improving the impact atomization effect of the liquid fuel.

[0052] Continue to refer to Figure 2 The fuel injection device also includes a fuel pressurization valve 300, which is located at the outlet of the liquid fuel passage 120 and configured to pressurize the liquid fuel at the outlet of the liquid fuel passage 120. Through the fuel pressurization valve 300, the pressure and flow rate of the liquid fuel can be increased, thereby increasing its velocity as it flows out of the liquid fuel passage 120, and further enhancing the collision effect between the liquid fuel and the impinging airflow.

[0053] Continue to refer to Figure 2 The fuel injection device also includes a retaining cap 400. The nozzle structure 200 is mated to the injection valve body 100, and the retaining cap 400 is threaded onto the outside of the injection valve body 100. The nozzle structure 200 extends into and is engaged with the inside of the retaining cap 400. The retaining cap 400 improves the sealing performance at the connection between the injection valve body 100 and the nozzle structure 200, preventing liquid fuel leakage.

[0054] Example 2

[0055] This embodiment provides a fuel injection device.

[0056] Figure 3 A schematic diagram of the fuel injection device provided in Embodiment 2 of this utility model is shown. (Refer to...) Figure 3 The difference between this embodiment and Embodiment 1 is that the specific structure of the flow channel 210 of the nozzle structure 200 of the fuel injection device provided in this embodiment is different.

[0057] Specifically, in this embodiment, the flow channel 210 of the nozzle structure 200 includes a tapering section 211, a throat section 212, and a diverging section 213 arranged sequentially. The impinging airflow channel 110 and the liquid fuel channel 120 are both connected to the tapering section 211, and the diverging section 213 is connected to the intake channel 10. The flow channel 210 and the liquid fuel channel 120 are coaxially arranged. Along the direction away from the liquid fuel channel 120, the inner diameter of the tapering section 211 gradually decreases, and the inner diameter of the diverging section 213 gradually increases. Through the above arrangement, the flow channel 210 can form a Venturi tube structure. That is, the flow channel 210 can utilize the Venturi effect to accelerate the mixture of liquid fuel and impinging airflow, improving the ejection efficiency of the nozzle structure 200 and further enhancing the atomization degree of the liquid fuel.

[0058] More specifically, the nozzle structure 200 is further provided with a nozzle body 220, which is connected to the air intake 10 and connected to the outlet of the flow channel 210, and can further increase the ejection speed of the mixture of liquid fuel and impinging airflow.

[0059] Example 3

[0060] This embodiment provides a fuel injection device.

[0061] Figure 4 This diagram illustrates the structural arrangement of the fuel injection device provided in Embodiment 3 of the present invention within an engine. (Refer to...) Figure 4 The difference between this embodiment and Embodiment 1 is that the fuel injection device provided in this embodiment also includes an injection pipe 500.

[0062] Specifically, the injection pipe 500 is connected to the outlet of the flow channel 210 and extends into the intake duct 10. By providing the injection pipe 500, the reliability of liquid fuel entering the intake duct 10 can be improved. Furthermore, since the injection pipe 500 extends towards the inlet of the combustion chamber 20, the flow direction of the atomized fuel gas flow can be controlled, effectively preventing liquid fuel from adhering to the walls of the intake duct 10.

[0063] More specifically, the injection pipe 500 is provided with multiple outlet channels. This configuration improves the dispersion of the liquid fuel injection and enhances the uniformity of its mixing with the air in the intake duct 10.

[0064] More specifically, the injection nozzle 500 extends toward the inlet of the engine's combustion chamber 20 to prevent atomized liquid fuel from being sprayed onto the inner wall of the intake duct 10.

[0065] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure involved in this utility model is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

[0066] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A fuel injection device, characterized in that, include: The injection valve body (100) is provided with an impact airflow channel (110) and a liquid fuel channel (120). The impact airflow can flow in the impact airflow channel (110) and the liquid fuel can flow in the liquid fuel channel (120). The nozzle structure (200) is provided with a flow channel (210) connected to the air intake (10) of the engine. The impact airflow channel (110) and the liquid fuel channel (120) both extend toward the inlet of the nozzle structure (200). The impact airflow can impact and atomize the liquid fuel flowing out through the liquid fuel channel (120) upstream of the nozzle structure (200). The atomized liquid fuel and the impact airflow can enter the air intake (10) through the flow channel (210).

2. The fuel injection device according to claim 1, characterized in that, There are multiple impact airflow channels (110), and the multiple impact airflow channels (110) are arranged in a circumferential array around the liquid fuel channel (120). The outlets of the multiple impact airflow channels (110) are arranged in a circumferential array at the outlet of the liquid fuel channel (120).

3. The fuel injection device according to claim 1, characterized in that, The fuel injection device further includes a fuel pressurization valve (300), which is located at the outlet of the liquid fuel channel (120) and configured to pressurize the liquid fuel at the outlet of the liquid fuel channel (120).

4. The fuel injection device according to claim 1, characterized in that, The flow channel (210) includes a converging section (211), a throat section (212), and a expanding section (213) connected in sequence. The impact airflow channel (110) and the liquid fuel channel (120) are both connected to the converging section (211), and the expanding section (213) is connected to the air intake (10).

5. The fuel injection device according to claim 1, characterized in that, The fuel injection device also includes a fixing cap (400), the nozzle structure (200) is mated to the injection valve body (100), and the fixing cap (400) is connected to the outer periphery of the injection valve body (100) and the nozzle structure (200).

6. The fuel injection device according to any one of claims 1-5, characterized in that, The fuel injection device further includes an injection pipe (500) connected to the nozzle structure (200) and extending into the air intake (10).

7. The fuel injection device according to claim 6, characterized in that, The jet inlet pipe (500) is provided with multiple outlet channels.

8. The fuel injection device according to claim 6, characterized in that, The injection nozzle (500) extends toward the entrance of the combustion chamber (20) of the engine.

9. An engine, characterized in that, The engine includes a cylinder head, a cylinder block, and a fuel injection device as described in any one of claims 1-8. A piston is disposed in the cylinder block, an intake passage (10) is provided in the cylinder head, a combustion chamber (20) is formed between the piston and the cylinder head, and the nozzle structure (200) is connected to the intake passage (10).

10. A vehicle, characterized in that, Includes the engine as described in claim 9, the engine being configured to provide power to the vehicle.

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