A precision fuel injection carburetor

Abstract

This utility model relates to the field of carburetor technology and discloses a precision fuel injection carburetor, including a carburetor body, a fuel injection mechanism on the surface of the carburetor body, a filter mechanism on the surface of the fuel injection mechanism, a motor housing fixedly connected to the surface of the carburetor body, and a torsion spring cover fixedly connected to the surface of the carburetor body. This utility model uses an annular nozzle tube to deliver fuel, ensuring uniform fuel distribution on the surface of the carburetor body. By using nozzles, the fuel inside the annular nozzle tube is separated through the evenly distributed nozzles, allowing for thorough mixing of fuel and air, promoting fuel atomization, improving combustion efficiency, and enhancing the practicality of the device. By using a pressure tube with a relatively small diameter, the fuel flow space is reduced, increasing the fuel flow velocity and allowing the fuel to quickly fill the annular nozzle tube before being sprayed from the nozzles, ensuring uniform fuel spraying.

Description

Technical Field

[0001] This utility model relates to the field of carburetor technology, and in particular to an electronically controlled carburetor for precise fuel injection. Background Technology

[0002] The working principle of a carburetor is to draw the air-fuel mixture into the engine through negative pressure during the intake process. In small engines like this, the fuel injection quantity cannot be precisely controlled, causing the air-fuel mixture concentration to deviate from the stoichiometric air-fuel ratio. This results in high fuel consumption, difficulty starting at high altitudes, and emissions that do not meet the US EPA3 emission standards. With rising fuel prices, this leads to significant operating costs for users. Therefore, carburetors with electronic fuel injection (EFI) are gradually replacing carburetors. EFI carburetors work in conjunction with the injectors and the electronic control unit (ECU). The ECU calculates the optimal fuel quantity based on the engine's operating conditions and controls the carburetor to inject fuel via signals. The fuel injection quantity is determined by the strength of the current and the duration of the on / off switch, allowing for precise control of the fuel injection quantity and method.

[0003] During use, the fuel injectors of existing electronic fuel injection carburetors are prone to clogging due to impurities, sediments, or water in the fuel. Clogged fuel injectors affect fuel injection accuracy and combustion efficiency, which may lead to engine stalling or power reduction. At the same time, the single nozzle structure of the current fuel injectors may result in uneven fuel mixing and atomization, leading to reduced fuel efficiency or increased emissions. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an electronically controlled carburetor for precise fuel injection.

[0005] This utility model is achieved using the following technical solution: a precision fuel injection carburetor, comprising a carburetor body, a fuel injection mechanism disposed on the surface of the carburetor body, a filter mechanism disposed on the surface of the fuel injection mechanism, a motor housing fixedly connected to the surface of the carburetor body, a torsion spring cover fixedly connected to the surface of the carburetor body, mating mounting plates fixedly connected to both ends of the carburetor body, a stepper motor fixedly connected to the inner wall of the motor housing, a damper rotatably connected to the inner wall of the carburetor body, and a torsion spring fixedly connected to the inner wall of the torsion spring cover;

[0006] The oil injection mechanism includes an annular nozzle tube, with a nozzle fixedly connected to the inner wall of the annular nozzle tube, and a pressure tube fixedly connected to the inner wall of the annular nozzle tube.

[0007] As a further improvement to the above solution, the inner wall of the annular nozzle tube is fixedly connected to the surface of the carburetor body, and the surface of the nozzle is fixedly connected to the inner wall of the carburetor body.

[0008] The above technical solution involves setting up an annular nozzle pipe to deliver fuel to the annular nozzle pipe, thereby ensuring that the fuel is evenly distributed on the surface of the carburetor body.

[0009] As a further improvement to the above scheme, the number of nozzles is set to eight, and the nozzles are evenly arranged on the inner wall of the annular nozzle tube with the carburetor body as the center.

[0010] By using the above technical solution, and by setting nozzles, the fuel inside the annular nozzle tube is separated through evenly distributed nozzles, which will allow the fuel to mix fully with the air, promote the fuel atomization effect, improve the fuel combustion efficiency, and enhance the practicality of the device.

[0011] As a further improvement to the above solution, the filtration mechanism includes a filter box, the inner wall of which is fixedly connected to a multi-stage filter plate, and the surface of which is fixedly connected to an oil delivery pipe.

[0012] As a further improvement to the above solution, the surface of the filter box is fixedly connected to the end of the pressurized pipe away from the annular nozzle pipe.

[0013] Through the above technical solution, by setting up a filter box, fuel is delivered to the filter box through the fuel supply pipe and filtered through multiple filter plates to prevent impurities in the fuel from entering the pressurization pipe and causing blockage of the pressurization pipe or nozzle, which would affect the combustion efficiency of the fuel, ensure the normal operation of the device, and improve the reliability of the device.

[0014] As a further improvement to the above scheme, the inner diameter of the oil delivery pipe is larger than the inner diameter of the pressurization pipe.

[0015] The above technical solution involves setting up a pressurization pipe with a relatively small diameter. By reducing the fuel flow space, the fuel flow velocity is increased, allowing the fuel to quickly fill the annular nozzle pipe and be sprayed out from the nozzle, thus ensuring the uniformity of fuel spraying.

[0016] As a further improvement to the above solution, the output end of the stepper motor is fixedly connected to the bottom of the damper, the surface of the damper is rotatably connected to the inner wall of the carburetor body, and the inner wall of the damper is fixedly connected to the end of the torsion spring away from the torsion spring cover.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention features a fuel injection mechanism, specifically an annular nozzle tube, to deliver fuel evenly across the surface of the carburetor body. By using nozzles, the fuel inside the annular nozzle tube is dispersed through these evenly distributed nozzles, ensuring thorough mixing of fuel with air, promoting fuel atomization, improving combustion efficiency, and enhancing the device's practicality. Furthermore, a pressure pipe with a relatively narrow diameter reduces the fuel flow space, increasing the fuel flow velocity and allowing the fuel to quickly fill the annular nozzle tube before being sprayed out, guaranteeing uniform fuel spraying.

[0019] This invention incorporates a filtration mechanism, specifically a filter box. Fuel is delivered to the filter box via a fuel supply pipe and filtered through multiple filter plates. This prevents impurities in the fuel from entering the pressurization pipe and causing blockages in the pressurization pipe or nozzle, which would affect the combustion efficiency of the fuel. This ensures the normal operation of the device and improves its reliability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a side view of the structure of this utility model;

[0022] Figure 3 This is a top view of the structure of this utility model;

[0023] Figure 4 This is a schematic cross-sectional view of the present invention.

[0024] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0025] Explanation of key symbols:

[0026] 1. Carburetor body; 2. Injection mechanism; 201. Annular nozzle pipe; 202. Nozzle; 203. Pressurization pipe; 3. Filtration mechanism; 301. Filter box; 302. Multi-stage filter plate; 303. Fuel delivery pipe; 4. Motor box; 5. Torsion spring cover; 6. Connecting mounting plate; 7. Stepper motor; 8. Choke; 9. Torsion spring. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] Example:

[0029] Please combine Figure 1-5This embodiment of a precision fuel injection carburetor includes a carburetor body 1, a fuel injection mechanism 2 disposed on the surface of the carburetor body 1, a filter mechanism 3 disposed on the surface of the fuel injection mechanism 2, a motor box 4 fixedly connected to the surface of the carburetor body 1, a torsion spring cover 5 fixedly connected to the surface of the carburetor body 1, mating mounting plates 6 fixedly connected to both ends of the carburetor body 1, a stepper motor 7 fixedly connected to the inner wall of the motor box 4, a damper 8 rotatably connected to the inner wall of the carburetor body 1, and a torsion spring 9 fixedly connected to the inner wall of the torsion spring cover 5.

[0030] The oil injection mechanism 2 includes an annular nozzle tube 201, a nozzle 202 is fixedly connected to the inner wall of the annular nozzle tube 201, and a pressure tube 203 is fixedly connected to the inner wall of the annular nozzle tube 201.

[0031] The inner wall of the annular nozzle pipe 201 is fixedly connected to the surface of the carburetor body 1, and fuel is delivered to the annular nozzle pipe 201 so that the fuel is evenly distributed on the surface of the carburetor body 1. The surface of the nozzle 202 is fixedly connected to the inner wall of the carburetor body 1.

[0032] The number of nozzles 202 is set to eight. The nozzles 202 are evenly arranged on the inner wall of the annular nozzle tube 201 with the carburetor body 1 as the center. The fuel inside the annular nozzle tube 201 is distributed through the evenly distributed nozzles 202, which will make the fuel fully mix with the air, promote the fuel atomization effect, and improve the fuel combustion efficiency.

[0033] The filtration mechanism 3 includes a filter box 301, with multi-stage filter plates 302 fixedly connected to the inner wall of the filter box 301, and an oil delivery pipe 303 fixedly connected to the surface of the filter box 301.

[0034] The surface of the filter box 301 is fixedly connected to the end of the pressurization pipe 203 away from the annular nozzle pipe 201. Fuel is delivered to the filter box 301 through the fuel supply pipe 303 and filtered by the multi-stage filter plate 302 to prevent impurities in the fuel from entering the pressurization pipe 203 and causing blockage of the pressurization pipe 203 or the nozzle 202.

[0035] The inner diameter of the fuel delivery pipe 303 is larger than that of the pressurization pipe 203. The diameter of the pressurization pipe 203 is relatively smaller. By reducing the fuel flow space, the fuel flow speed is increased, so that the fuel can quickly fill the annular nozzle pipe 201 and be sprayed out from the nozzle 202.

[0036] The output end of the stepper motor 7 is fixedly connected to the bottom of the damper 8, the surface of the damper 8 is rotatably connected to the inner wall of the carburetor body 1, and the inner wall of the damper 8 is fixedly connected to the end of the torsion spring 9 away from the torsion spring cover 5.

[0037] The implementation principle of a precision fuel injection carburetor in this embodiment is as follows: During use, fuel is delivered to the filter box 301 through the fuel supply pipe 303 and filtered through multi-stage filter plates 302 to prevent impurities in the fuel from entering the pressurization pipe 203 and causing blockage of the pressurization pipe 203 or the nozzle 202. The filtered fuel enters the pressurization pipe 203, which has a relatively small diameter. By reducing the fuel flow space, the flow speed of the fuel is increased, allowing the fuel to quickly fill the annular nozzle pipe 201 and evenly distribute the fuel on the surface of the carburetor body 1. Then, the fuel inside the annular nozzle pipe 201 is separated through the evenly distributed nozzles 202, which allows the fuel to mix fully with the air, promotes the fuel atomization effect, and improves the fuel combustion efficiency.

[0038] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A precision fuel injection carburetor, characterized by, The carburetor body (1) includes a fuel injection mechanism (2) on the surface of the carburetor body (1), a filter mechanism (3) on the surface of the fuel injection mechanism (2), a motor box (4) fixedly connected to the surface of the carburetor body (1), a torsion spring cover (5) fixedly connected to the surface of the carburetor body (1), a mating mounting plate (6) fixedly connected to both ends of the carburetor body (1), a stepper motor (7) fixedly connected to the inner wall of the motor box (4), a damper (8) rotatably connected to the inner wall of the carburetor body (1), and a torsion spring (9) fixedly connected to the inner wall of the torsion spring cover (5). The oil injection mechanism (2) includes an annular nozzle tube (201), a nozzle (202) is fixedly connected to the inner wall of the annular nozzle tube (201), and a pressure tube (203) is fixedly connected to the inner wall of the annular nozzle tube (201).

2. The fuel injection precision electronic fuel injector according to claim 1, characterized in that: The inner wall of the annular nozzle tube (201) is fixedly connected to the surface of the carburetor body (1), and the surface of the nozzle (202) is fixedly connected to the inner wall of the carburetor body (1).

3. The precision fuel injection carburettor as claimed in claim 1 wherein said fuel injection valve is a solenoid valve. The number of nozzles (202) is set to eight, and the nozzles (202) are evenly arranged on the inner wall of the annular nozzle tube (201) with the carburetor body (1) as the center.

4. The precision fuel injection carburetor as described in claim 1, characterized in that: The filtration mechanism (3) includes a filter box (301), the inner wall of which is fixedly connected to a multi-stage filter plate (302), and the surface of the filter box (301) is fixedly connected to an oil delivery pipe (303).

5. The precision fuel injection carburetor as described in claim 4, characterized in that: The surface of the filter box (301) is fixedly connected to the end of the pressurized pipe (203) away from the annular nozzle pipe (201).

6. The precision fuel injection carburetor as described in claim 4, characterized in that: The inner diameter of the oil delivery pipe (303) is larger than the inner diameter of the pressurization pipe (203).

7. The precision fuel injection carburetor of claim 1, wherein: the fuel injector is a piezoelectric fuel injector. The output end of the stepper motor (7) is fixedly connected to the bottom of the damper (8), the surface of the damper (8) is rotatably connected to the inner wall of the carburetor body (1), and the inner wall of the damper (8) is fixedly connected to the end of the torsion spring (9) away from the torsion spring cover (5).

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