CN216588865U - Carburetor, micro engine and model car - Google Patents

Abstract

The utility model discloses a carburetor, a micro engine and a model car, wherein the carburetor comprises: the carburetor comprises a carburetor main body, a carburetor main body and a carburetor control system, wherein the carburetor main body is provided with an air inlet, a mixed gas outlet, an oil inlet nozzle, an oil inlet channel and an oil nozzle; the fuel pressurizing device comprises a bottom cover, a middle cover and a top cover which are sequentially arranged, a fuel pressurizing cavity is arranged between the carburetor main body and the top cover, an oil inlet cavity, an oil outlet cavity and a first air cavity are arranged between the top cover and the middle cover, the oil inlet cavity is respectively communicated with the oil inlet channel and the fuel pressurizing cavity, and the oil outlet cavity is communicated with the oil nozzle; a second air cavity and a third air cavity are arranged between the middle cover and the bottom cover, a separation film is arranged between the second air cavity and the third air cavity, the second air cavity is communicated with the inner cavity of the carburetor main body, and the third air cavity is communicated with the atmosphere; a first pushing piece is arranged between the fuel oil pressurizing cavity and the first air cavity, a second pushing piece is arranged between the first air cavity and the second air cavity, the second pushing piece is abutted against the first pushing piece, and the second pushing piece can push the first pushing piece towards the fuel oil pressurizing cavity under the action of pressure difference.

Description

Carburetor, micro engine and model car

Technical Field

The utility model relates to the field of model vehicles, in particular to a carburetor, a micro engine and a model vehicle.

Background

The carburetor is an important accessory around engine, and is a device mounted on the air intake channel of engine, and its function is to mix fuel oil and air according to a certain proportion and atomize them, and feed the atomized fuel oil and air into the combustion chamber of engine, then burn them to produce power.

The existing carburetor comprises a carburetor body, an oil inlet nozzle, an oil nozzle and an air outlet, wherein fuel oil enters from the oil inlet nozzle and is discharged from the oil nozzle, and is mixed with air and atomized under the injection of air to form mixed gas, and the atomized mixed gas enters into a combustion chamber of an engine to be combusted.

However, the existing carburetor has insufficient fuel and air mixing, resulting in insufficient fuel combustion, and affecting the running stability of the engine.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a carburetor and aims to solve the technical problem that fuel oil and air of an existing carburetor are not mixed fully.

To achieve the above object, the present invention provides a carburetor, including:

the carburetor main body is provided with an air inlet, a mixed gas outlet, an oil inlet nozzle, an oil inlet channel and an oil nozzle, and the air inlet, the mixed gas outlet and the oil nozzle are communicated in pairs;

the fuel pressurizing device comprises a bottom cover, a middle cover and a top cover which are sequentially arranged, a fuel pressurizing cavity is arranged between the carburetor main body and the top cover, an oil inlet cavity, an oil outlet cavity and a first air cavity are arranged between the top cover and the middle cover, the oil inlet cavity is respectively communicated with the oil inlet channel and the fuel pressurizing cavity, and the oil outlet cavity is communicated with the nozzle;

a second air cavity and a third air cavity are arranged between the middle cover and the bottom cover, a separation film is arranged between the second air cavity and the third air cavity, the second air cavity is communicated with the inner cavity of the carburetor main body, and the third air cavity is communicated with the atmosphere;

the fuel oil pressurizing cavity is provided with a first air cavity, the first air cavity is provided with a second air cavity, the second air cavity is provided with a second pushing piece, the second pushing piece is abutted to the first pushing piece, and the second pushing piece can push the first pushing piece towards the fuel oil pressurizing cavity under the action of pressure difference, so that the first pushing piece pushes the fuel oil in the fuel oil pressurizing cavity to pressurize the fuel oil pressurizing cavity.

Preferably, the first pushing member comprises two first disk-shaped plates arranged oppositely and a first connecting rod arranged between the two first disk-shaped plates, and the two first disk-shaped plates are respectively positioned in the fuel pressurizing cavity and the first air cavity; and/or the presence of a gas in the gas,

the second pushing piece comprises two second disc-shaped plates which are arranged oppositely and a second connecting rod which is arranged between the two second disc-shaped plates, and the two second disc-shaped plates are respectively positioned in the first air cavity and the second air cavity.

Preferably, the first connecting rod comprises a first rod body and a second rod body, and the second rod body is inserted into the cavity of the first rod body; and/or the presence of a gas in the gas,

the second connecting rod comprises a third rod body and a fourth rod body, and the fourth rod body is inserted into a cavity of the third rod body.

Preferably, the carburetor further comprises a negative pressure channel for providing negative pressure to the second air chamber, one end of the negative pressure channel is communicated with the inner cavity of the carburetor body, and the other end of the negative pressure channel is communicated with the second air chamber.

Preferably, be equipped with fuel pressurization membrane in the fuel pressurization intracavity, fuel pressurization membrane is located the top surface of top cap, fuel pressurization membrane corresponds oil outlet cavity department is equipped with first through-hole and movable vane, movable vane is located in the first through-hole, be used for opening and shutting the oil outlet cavity.

Preferably, the oil nozzle comprises a tubular oil needle seat and a first oil needle arranged in the oil needle seat, the first oil needle is arranged along the axial direction of the oil needle seat and can move along the axial direction of the oil needle seat, and a second through hole communicated with the oil outlet cavity is formed in the oil needle seat.

Preferably, the carburetor further includes a throttle post, a second oil needle and a throttle rocker arm, the second oil needle and the oil nozzle penetrate the carburetor body from opposite sides of the carburetor body, respectively, and a needle tip of the second oil needle is insertable into an end of the oil nozzle facing the second oil needle;

the air door column is sleeved on the second oil needle, the outer wall of the air door column is attached to the inner cavity of the carburetor main body, the air door column is provided with a third through hole, and one end, facing the second oil needle, of the oil nozzle is located in the third through hole.

The throttle rocker arm is respectively connected with the second oil needle and the air door column, and the throttle rocker arm is used for driving the air door column and the second oil needle to jointly wind the axial rotation of the air door column and follow the axial movement of the air door column.

Preferably, the carburetor further comprises an idle adjustment knob arranged on the carburetor body and perpendicular to a central axis of the throttle post, a side of the throttle post near the idle adjustment knob is provided with a slot, and a tip of the idle adjustment knob is inserted into the slot.

The utility model also provides a micro engine which comprises a carburetor.

The utility model further provides a model vehicle, which comprises a micro engine.

Compared with the prior art, the embodiment of the utility model has the beneficial technical effects that:

according to the technical scheme, when the engine is started, negative pressure can be generated in the air suction process of the engine, fuel oil enters the fuel oil inlet cavity from the oil tank through the oil inlet nozzle and the oil inlet channel under the action of the negative pressure, and the oil inlet cavity is communicated with the fuel oil pressurizing cavity, so that the fuel oil in the fuel oil inlet cavity enters the fuel oil pressurizing cavity.

Meanwhile, the second air cavity is communicated with the inner cavity of the carburetor main body, so negative pressure can be generated in the second air cavity, and pressure difference can be generated between the second air cavity and the third air cavity because the third air cavity is communicated with the atmosphere, so that the second pushing piece pushes the first pushing piece upwards, and then the first pushing piece pushes fuel in the fuel pressurizing cavity. Because the fuel in the fuel pressurizing cavity is extruded, the fuel pressure is increased, and the pressurized fuel enters the fuel outlet cavity and then enters the fuel injection nozzle so as to be sprayed out through the fuel injection nozzle. The pressurized fuel oil can enable the fuel oil to be more fully mixed with air, so that the fuel oil is more fully combusted, and the running stability of the engine is improved.

Drawings

FIG. 1 is a schematic view of a carburetor according to an embodiment of the present invention;

FIG. 2 is a schematic view of the carburetor of FIG. 1 from another perspective;

FIG. 3 is a schematic view of an internal structure of the carburetor of FIG. 1;

FIG. 4 is a schematic fuel flow diagram of the carburetor of the embodiment of FIG. 3;

FIG. 5 is another schematic internal view of the carburetor of FIG. 1;

FIG. 6 is a schematic fuel flow diagram of the carburetor of the embodiment of FIG. 5;

FIG. 7 is a schematic view of another internal structure of the carburetor of FIG. 1;

FIG. 8 is a schematic view of a further internal structure of the carburetor of the embodiment of FIG. 1;

FIG. 9 is an exploded view of the carburetor of the embodiment of FIG. 1;

FIG. 10 is a schematic view of the first pusher and the second pusher of the embodiment of FIG. 9;

FIG. 11 is a schematic structural view of the oil needle seat in the embodiment of FIG. 9;

fig. 12 is a schematic structural diagram of a fuel pressurizing membrane in the embodiment of fig. 9.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only and are not to be construed as limiting the present invention, and all other embodiments that can be made by one skilled in the art without inventive effort based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In some embodiments, referring to fig. 1-10, the present invention provides a carburetor, comprising:

the carburetor comprises a carburetor main body 1, an air inlet 2, a mixed gas outlet 3, an oil inlet nozzle 4, an oil inlet channel 5 and an oil nozzle 6, wherein the air inlet 2, the mixed gas outlet 3 and the oil nozzle 6 are communicated in pairs;

the fuel oil pressurizing device 7 comprises a bottom cover 71, a middle cover 72 and a top cover 73 which are sequentially arranged, a fuel oil pressurizing cavity 8 is arranged between the carburetor main body 1 and the top cover 73, an oil inlet cavity 9, an oil outlet cavity 10 and a first air cavity 20 are arranged between the top cover 73 and the middle cover 72, the oil inlet cavity 9 is respectively communicated with the oil inlet channel 5 and the fuel oil pressurizing cavity 8, and the oil outlet cavity 10 is communicated with the oil nozzle 6;

a second air cavity 30 and a third air cavity 40 are arranged between the middle cover 72 and the bottom cover 71, a separation film 50 is arranged between the second air cavity 30 and the third air cavity 40, the second air cavity 30 is communicated with the inner cavity of the carburetor main body 1, and the third air cavity 40 is communicated with the atmosphere;

the first pushing piece 60 is arranged between the fuel oil pressurizing cavity 8 and the first air cavity 20, the second pushing piece 70 is arranged between the first air cavity 20 and the second air cavity 30, the second pushing piece 70 is abutted against the first pushing piece 60, and the second pushing piece 70 can push the first pushing piece 60 towards the fuel oil pressurizing cavity 8 under the action of pressure difference, so that the first pushing piece 60 pushes the fuel oil in the fuel oil pressurizing cavity 8 to pressurize the fuel oil pressurizing cavity.

In this embodiment, the carburetor main body 1 is an atomizer body having an atomizing chamber, and the air inlet 2 and the mixture outlet 3 are respectively communicated with the atomizing chamber. The air inlet 2 and the mixed gas outlet 3 are respectively positioned at the front side and the rear side of the atomization cavity, the oil inlet nozzle 4 is positioned at the upper side of the carburetor body 1, the oil inlet channel 5 penetrates through the carburetor body 1 along the vertical direction, one end of the oil inlet channel 5 is communicated with the oil inlet nozzle 4, and the other end of the oil inlet channel is communicated with the oil inlet cavity 9.

In the technical scheme of the utility model, when the engine is started, the engine can generate negative pressure in the air suction process, fuel oil enters the oil inlet cavity 9 from the oil tank through the oil inlet nozzle 4 and the oil inlet channel 5 under the action of the negative pressure, and the oil inlet cavity 9 is communicated with the fuel oil pressurizing cavity 8, so that the fuel oil in the oil inlet cavity 9 enters the fuel oil pressurizing cavity 8.

Meanwhile, since the second air chamber 30 communicates with the inner chamber of the carburetor body 1, negative pressure is generated in the second air chamber 30, and since the third air chamber 40 communicates with the atmosphere, a pressure difference is generated between the second air chamber 30 and the third air chamber 40, so that the second push member 70 pushes the first push member 60 upward, and then the first push member 60 pushes the fuel in the fuel pressurizing chamber 8.

Since the fuel in the fuel pressurizing chamber 8 is compressed, the fuel pressure increases, and the pressurized fuel enters the fuel outlet chamber 10 and then the fuel injection nozzle 6 to inject the pressurized fuel through the fuel injection nozzle 6. The fuel oil after pressurization can enable the fuel oil to be more fully mixed with air, so that the fuel oil is more fully combusted, and the running stability of the engine is improved.

In some embodiments, referring to fig. 3, 9 and 10, the first pushing member 60 of the present invention includes two first disk-shaped plates 601 disposed opposite to each other and a first connecting rod 602 disposed between the two first disk-shaped plates 601, where the two first disk-shaped plates 601 are respectively located in the fuel pressurizing chamber 8 and the first air chamber 20; and/or the presence of a gas in the gas,

the second pushing member 70 includes two second disc-shaped plates 701 disposed oppositely and a second connecting rod 702 disposed between the two second disc-shaped plates 701, and the two second disc-shaped plates 701 are respectively located in the first air chamber 20 and the second air chamber 30.

In this embodiment, the first pushing member 60 includes two first disk-shaped plates 601 and a first connecting rod 602, and the two first disk-shaped plates 601 are connected by the first connecting rod 602. Two first disk plates 601 are respectively positioned in the fuel pressurizing chamber 8 and the first air chamber 20, and a first connecting rod 602 can move up and down between the fuel pressurizing chamber 8 and the first air chamber 20. Wherein the disc mounting plate can increase the contact area so that the fuel in the fuel pressurizing chamber 8 is subjected to a greater pressure. Similarly, the second pushing member 70 includes two second disk-shaped plates 701 and a second connecting rod 702, and the two second disk-shaped plates 701 are connected by the second connecting rod 702. Two second disc plates 701 are respectively located in the first air chamber 20 and the second air chamber 30, and a second connecting rod 702 is movable up and down between the first air chamber 20 and the second air chamber 30. The plate can increase the contact area, so that the pressure on the fuel in the combustion chamber is larger.

In some embodiments, referring to fig. 3, 9 and 10, the first connecting rod 602 includes a first rod 6021 and a second rod 6022, and the second rod 6022 is inserted into the cavity of the first rod 6021; and/or the second connecting rod 702 comprises a third rod 7021 and a fourth rod 7022, and the fourth rod 7022 is inserted into a cavity of the third rod 7021. In this embodiment, the first connecting rod 602 includes a first rod 6021 and a second rod 6022, the first rod 6021 is hollow, a cavity is formed inside the first rod 6021 for the second rod 6022 to be inserted into the first rod 6021, and the second rod 6022 is in interference fit with the first rod 6021. The first rod 6021 is connected to the first disk plate 601 in the first air chamber 20, and the second rod 6022 is connected to the first disk plate 601 in the fuel pressurizing chamber 8. Similarly, the second connecting rod 702 includes a third rod 7021 and a fourth rod 7022, the third rod 7021 is hollow, a cavity for inserting the fourth rod 7022 into the third rod 7021 is formed in the third rod 7021, and the fourth rod 7022 is in interference fit with the third rod 7021. Wherein the third rod 7021 is connected to the second disk plate 701 disposed in the second air chamber 30, and the fourth rod 7022 is connected to the second disk plate 701 disposed in the first air chamber 20.

In some embodiments, referring to fig. 8, the carburetor further includes a negative pressure passage 80 for providing negative pressure to the second air chamber 30, and one end of the negative pressure passage 80 communicates with the inner cavity of the carburetor body 1 and the other end communicates with the second air chamber 30. In this embodiment, the negative pressure passage 80 is used to provide negative pressure to the second air chamber 30, and the negative pressure passage 80 penetrates the carburetor body 1, the top cover 73, the middle cover 72, and the bottom cover 71 in this order. One end of the negative pressure channel 80 is communicated with the inner cavity of the carburetor main body 1, the other end is communicated with the second air cavity 30, and the negative pressure channel 80 is communicated with the inner cavity of the carburetor main body 1, so that negative pressure generated during starting of an engine can generate negative pressure in the second air cavity 30 through the negative pressure channel 80, and pressure difference is generated between the negative pressure and the third air cavity 40, and the second pushing piece 70 can push the first pushing piece 60 upwards under the action of pressure, and the first pushing piece 60 can push fuel oil in the fuel oil pressurizing cavity 8, so that the fuel oil in the fuel oil pressurizing cavity 8 can be pressurized.

In some embodiments, please refer to fig. 3, 4, 9, and 12, a fuel pressurizing film 90 is disposed in the fuel pressurizing chamber 8, the fuel pressurizing film 90 is disposed on the top surface of the top cover 73, a first through hole 91 and a movable blade 92 are disposed at a position of the fuel pressurizing film 90 corresponding to the oil outlet chamber 10, and the movable blade 92 is disposed in the first through hole 91 and used for opening and closing the oil outlet chamber 10. In this embodiment, a fuel pressurizing membrane 90 is disposed between the top cover 73 and the bottom of the carburetor body 1, the fuel pressurizing membrane 90 is disposed on the top surface of the top cover 73 and is in contact with the first pushing member 60, and when the first pushing member 60 is pushed upward, fuel is pressed by the fuel pressurizing membrane 90. Since the fuel pressurizing film 90 is coated on the surface of the top cover 73, the contact area of the fuel pressurizing film and the fuel is large, and therefore the pressure to which the fuel is subjected can be larger. Further, a first through hole 91 is formed in the fuel pressurizing membrane 90, the first through hole 91 is located at the position of the oil outlet cavity 10, a movable blade 92 is arranged in the first through hole 91, and the movable blade 92 can be opened and closed relative to the first through hole 91. The movable vane 92 completely covers the outlet of the oil outlet chamber 10, when the fuel in the oil outlet chamber 10 flows to the fuel injection nozzle 6, the fuel is pressurized, so that the movable vane 92 is opened under the action of the pressurized fuel, and when the fuel stops being delivered to the fuel injection nozzle 6, the movable vane 92 is reset under the action of self gravity, so as to seal the outlet of the oil outlet chamber 10 and prevent the fuel from flowing backwards.

In some embodiments, referring to fig. 7, 9, and 11, the oil nozzle 6 according to the present invention includes a tubular oil needle seat 61, and a first oil needle 62 disposed in the oil needle seat 61, where the first oil needle 62 is disposed along an axial direction of the oil needle seat 61 and is movable along the axial direction of the oil needle seat 61, and the oil needle seat 61 is provided with a second through hole 63 communicating with the oil outlet chamber 10. In this embodiment, the fuel injector 6 is transversely disposed in the inner cavity of the carburetor main body 1, and includes a fuel needle holder 61 and a first fuel needle 62, the fuel needle holder 61 is provided with a second through hole 63 communicating with the fuel outlet chamber 10, the carburetor main body 1 is provided with a fuel outlet passage, one end of the fuel outlet passage is communicated with the fuel outlet chamber 10, and the other end is communicated with the second through hole 63.

The first oil needle 62 can be screwed to achieve relative displacement between the first oil needle 62 and the oil needle seat 61 in the axial direction, that is, the depth of the first oil needle 62 inserted into the oil needle seat 61 is adjusted, and the closer the first oil needle 62 is to the second through hole 63, the less fuel is sprayed from the second through hole 63. Specifically, when the first oil needle 62 is not in contact with the second through hole 63, the second through hole 63 is in a fully open state, and the amount of fuel injected through the second through hole 63 is maximum; when the first oil needle 62 moves to a half position of the second through hole 63, the second through hole 63 is in a half-open state, and the amount of fuel injected through the second through hole 63 is correspondingly reduced by half; when the first oil needle 62 moves to completely cover the second through hole 63, the second through hole 63 is in a fully closed state.

In some embodiments, referring to fig. 1, 7 and 9, the carburetor of the present invention further includes a throttle post 100, a second oil needle 200 and a throttle rocker arm 300, wherein the second oil needle 200 and the oil nozzle 6 respectively penetrate into the carburetor body 1 from two opposite sides of the carburetor body 1, and a needle tip of the second oil needle 200 is insertable into an end of the oil nozzle 6 facing the second oil needle 200;

the air door column 100 is sleeved on the second oil pointer 200, the outer wall of the air door column 100 is arranged by being attached to the inner cavity of the carburetor main body 1, the air door column 100 is provided with a third through hole 101, and one end, facing the second oil pointer 200, of the oil nozzle 6 is located in the third through hole 101;

the throttle rocker arm 300 is respectively connected with the second throttle needle 200 and the throttle post 100, and the throttle rocker arm 300 is used for driving the throttle post 100 and the second throttle needle 200 to jointly rotate around the axial direction of the throttle post 100 and move along the axial direction of the throttle post 100.

In this embodiment, the needle tip of the second oil needle 200 faces the oil nozzle 6, the needle tip is of a conical structure, the needle tip (i.e. located in the atomizing cavity and facing one end of the oil nozzle 6) of the second oil needle 200 can be inserted into the oil nozzle 6, the other end of the second oil needle 200 is connected to the throttle rocker 300, and the throttle rocker 300 can control the size of the annular gap formed between the oil nozzle 6 and the needle tip of the second oil needle 200 by adjusting the depth of the needle tip of the second oil needle 200 inserted into the oil nozzle 6, so as to control the oil outlet amount (oil outlet rate).

The air door post 100 is attached to the inner wall of the atomization chamber, the air door post 100 is provided with a third through hole 101 along the radial direction, and the third through hole 101 is sequentially communicated with the air inlet 2 and the mixed gas outlet 3 to form an air path. The oil nozzle 6 positioned in the third through hole 101, the third through hole 101 and the mixed gas outlet 3 form an oil path. Air can enter from the air inlet 2, pass through the third through hole 101 on the air door column 100 and then be discharged from the mixture outlet 3. The throttle post 100 is further connected to the throttle rocker 300, that is, the throttle post 100 and the second oil needle 200 are controlled by the throttle rocker 300, so that they rotate along the axis of the throttle post 100 and move forward or backward, that is, move along with the rotation, along the axial direction of the throttle post 100. When the third through hole 101 of the damper column 100 is opposite to the air inlet 2, the amount of air entering the third through hole 101 is the largest, and when the third through hole 101 of the damper column 100 is staggered (vertically staggered or horizontally staggered) from the air inlet 2, the amount of air entering the third through hole 101 is reduced along with the increase of the staggered area of the third through hole and the air inlet. Accordingly, the closer the distance between the second needle 200 and the oil jet 6 is, the smaller the amount of oil entering the third through hole 101 is, and the farther the distance between the second needle 200 and the oil jet 6 is (until the oil jet 6 is separated), the larger the amount of oil entering the third through hole 101 is.

In some embodiments, referring to fig. 1, 2 and 9, the carburetor of the present invention further includes an idle adjustment knob 400 disposed on the carburetor body 1 and perpendicular to the central axis of the throttle lever 100, wherein the side of the throttle lever 100 near the idle adjustment knob 400 is provided with a slot 102, and the end of the idle adjustment knob 400 is inserted into the slot 102.

In this embodiment, carburetor idle is the most common engine operating condition for engine warm start processes and non-stop engine stops, etc., requiring little and rich mixture, i.e., a higher fuel to air ratio, to minimize engine power. To facilitate manual adjustment, the idle adjustment knob 400 is preferably inserted vertically into the carburetor body 1 from above the carburetor body 1 downward. The end of the idle adjustment knob 400, that is, the lower end thereof, is inserted into the carburetor body 1.

In this embodiment, the slot 102 has a certain width, and after the end of the idle speed adjustment knob 400 is inserted into the slot 102 and fixed in position, when the throttle cylinder 100 is driven by the throttle rocker arm 300 to rotate and move toward the fuel spray nozzle 6, the idle speed adjustment knob 400 limits the maximum forward movement distance of the throttle cylinder 100, that is, the maximum distance between the third through hole 101 of the throttle cylinder 100 and the air inlet 2 (that is, the minimum intake air amount) and the minimum distance between the second fuel needle 200 and the fuel spray nozzle 6 (that is, the minimum fuel intake amount). Since the engine needs a higher starting speed when starting, the slot 102 is provided to give the throttle post 100 a certain moving space, and when the idle speed adjustment knob 400 is fixed, the throttle post 100 and the second oil needle 200 can be adjusted in position by the throttle rocker arm 300, so as to obtain a higher gas-oil ratio to start the engine.

The present invention further provides a micro-engine including the carburetor described above, wherein the specific structure of the carburetor refers to the above-mentioned embodiments, and since the micro-engine adopts all technical solutions of all the above-mentioned embodiments, the micro-engine at least has all technical effects brought by the technical solutions of the above-mentioned embodiments, and no further description is given here.

The present invention further provides a model car including the aforesaid described micro engine, the micro engine includes the aforesaid described carburetor, the specific structure of the carburetor refers to the above-mentioned embodiments, and since the micro engine adopts all technical solutions of all the above-mentioned embodiments, the micro engine at least has all technical effects brought by the technical solutions of the above-mentioned embodiments, and details are not repeated herein.

The above is only a part or preferred embodiment of the present invention, and neither the text nor the drawings should limit the scope of the present invention, and all equivalent structural changes made by the present specification and the contents of the drawings or the related technical fields directly/indirectly using the present specification and the drawings are included in the scope of the present invention.

Claims (10)

1. A carburetor, comprising:

the carburetor main body is provided with an air inlet, a mixed gas outlet, an oil inlet nozzle, an oil inlet channel and an oil nozzle, and the air inlet, the mixed gas outlet and the oil nozzle are communicated in pairs;

the fuel pressurizing device comprises a bottom cover, a middle cover and a top cover which are sequentially arranged, a fuel pressurizing cavity is arranged between the carburetor main body and the top cover, an oil inlet cavity, an oil outlet cavity and a first air cavity are arranged between the top cover and the middle cover, the oil inlet cavity is respectively communicated with the oil inlet channel and the fuel pressurizing cavity, and the oil outlet cavity is communicated with the oil nozzle;

a second air cavity and a third air cavity are arranged between the middle cover and the bottom cover, a separation film is arranged between the second air cavity and the third air cavity, the second air cavity is communicated with the inner cavity of the carburetor main body, and the third air cavity is communicated with the atmosphere;

the fuel oil pressurizing cavity is provided with a first air cavity, the first air cavity is provided with a second air cavity, the second air cavity is provided with a second pushing piece, the second pushing piece is abutted to the first pushing piece, and the second pushing piece can push the first pushing piece towards the fuel oil pressurizing cavity under the action of pressure difference, so that the first pushing piece pushes the fuel oil in the fuel oil pressurizing cavity to pressurize the fuel oil pressurizing cavity.

2. A carburettor according to claim 1 wherein the first impeller comprises two oppositely disposed first disc plates and a first connecting rod disposed between the first disc plates, the first disc plates being located in the fuel pressurising chamber and the first air chamber respectively; and/or the presence of a gas in the gas,

the second pushing piece comprises two second disc-shaped plates which are arranged oppositely and a second connecting rod arranged between the two second disc-shaped plates, and the two second disc-shaped plates are respectively positioned in the first air cavity and the second air cavity.

3. A carburettor according to claim 2 wherein the first connecting rod comprises a first rod and a second rod, the second rod being received in a cavity in the first rod; and/or the presence of a gas in the gas,

the second connecting rod comprises a third rod body and a fourth rod body, and the fourth rod body is inserted into a cavity of the third rod body.

4. The carburetor of claim 1, further comprising a negative pressure passage for providing negative pressure to the second air chamber, one end of the negative pressure passage communicating with the inner cavity of the carburetor body and the other end communicating with the second air chamber.

5. The carburetor of claim 1, wherein a fuel pressurizing film is provided in the fuel pressurizing chamber, the fuel pressurizing film is provided on the top surface of the top cover, the fuel pressurizing film is provided with a first through hole and a movable vane corresponding to the oil outlet chamber, and the movable vane is located in the first through hole and used for opening and closing the oil outlet chamber.

6. The carburetor according to claim 1, wherein the fuel injector includes a tubular fuel needle seat and a first fuel needle disposed in the fuel needle seat, the first fuel needle being disposed along an axial direction of the fuel needle seat and being movable along the axial direction of the fuel needle seat, the fuel needle seat being provided with a second through hole communicating with the fuel outlet chamber.

7. The carburetor of claim 1, further comprising a throttle post, a second oil needle and a throttle rocker arm, wherein the second oil needle and the oil jet penetrate the carburetor body from opposite sides of the carburetor body, respectively, and wherein a needle tip of the second oil needle is insertable into an end of the oil jet facing the second oil needle;

the air door column is sleeved on the second oil needle, the outer wall of the air door column is arranged in a manner of being attached to the inner cavity of the carburetor main body, the air door column is provided with a third through hole, and one end, facing the second oil needle, of the oil nozzle is located in the third through hole;

the throttle rocker arm is respectively connected with the second oil needle and the air door column, and the throttle rocker arm is used for driving the air door column and the second oil needle to jointly wind the axial rotation of the air door column and follow the axial movement of the air door column.

8. The carburetor of claim 7, further comprising an idle adjustment knob disposed on the carburetor body and perpendicular to the central axis of the throttle post, the side of the throttle post adjacent the idle adjustment knob having a slot into which a distal end of the idle adjustment knob is insertable.

9. A miniature engine comprising a carburettor as claimed in any one of claims 1 to 8.

10. A model vehicle comprising the microengine of claim 9.

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