Carburetor with air inlet flow adjusting function

Abstract

The utility model discloses a carburetor with an air inlet flow adjusting function, which comprises a carburetor body, and the carburetor body is provided with an air inlet chamber, a mixed air chamber and a throat cavity communicated with the air inlet chamber and the mixed air chamber. A choke valve assembly used for controlling air to enter the throat cavity is arranged in the air inlet cavity. A throttle valve assembly for controlling mixed gas to enter an engine is arranged in the mixed gas chamber, a gas storage cavity and a gas inlet pipe communicated with the gas storage cavity are arranged on the carburetor body, a gas inlet adjusting channel capable of adjusting flow is arranged between the gas storage cavity and the throat cavity, and an adjusting piece used for adjusting the gas inlet flow of the gas inlet adjusting channel is arranged in the gas storage cavity. A linkage mechanism is arranged between the throttle valve assembly and the adjusting piece, one end of the linkage mechanism is in linkage with the throttle valve shaft, and the other end of the linkage mechanism is in linkage with the adjusting piece. The air inlet flow adjusting device can achieve air inlet flow adjustment along with the change of the opening degree of the throttle valve, enough mixed air flow is provided for an engine, and stable operation of the engine is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of carburetors, in particular to a carburetors with an air intake flow regulating function. Background Art

[0002] The carburetor is a mechanical device that mixes a certain proportion of gasoline / liquefied gas with air under the vacuum generated by the engine. As a precision mechanical device, the carburetor plays an important role in the engine and can be called the "heart" of the engine. When the carburetor is working at high speed, the liquefied gas enters the mixing chamber of the carburetor body from the intake pipe, and the air enters the mixing chamber through the choke. The two are mixed in the mixing chamber to form a mixed gas that enters the engine from the throttle.

[0003] Chinese patent No. CN201921457969.6 discloses a carburetor with stable idle speed, comprising a carburetor body, a through-type air outlet chamber provided in the carburetor body, an air intake bend pipe provided just above the throat on the carburetor body, the air intake bend pipe being connected to the air outlet chamber, an adjusting bolt provided on the side of the carburetor body, and a throttle shaft installed on the side of the carburetor body close to the adjusting bolt, a throttle valve provided on the throttle shaft, the throttle valve being located at one end of the air outlet chamber, a choke valve shaft provided on the other side of the carburetor body, a choke valve provided on the choke valve shaft in the air outlet chamber, a throttle valve adjusting screw provided at a position corresponding to the throttle valve on the carburetor body, an idle air outlet through hole provided at the end of the air outlet chamber away from the throttle valve, and an idle auxiliary air outlet structure provided between the carburetor body and the idle air outlet through hole.

[0004] The carburetor needs to automatically proportion the concentration of the corresponding mixed gas according to the different working conditions of the engine, and adjust the throttle opening to change the output power of the engine. As the throttle opening changes, the required intake flow rate also varies. In the above patent, liquefied gas enters the outlet chamber from the intake elbow, and the air flows into the outlet chamber and mixes with the liquefied gas to form a mixed gas. In this process, there is a lack of liquefied gas intake flow regulation, and the flow cannot be automatically adjusted as the throttle opening changes. Summary of the invention

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a carburetor with an intake flow regulating function.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a carburetor with an intake flow regulating function, comprising a carburetor body, an intake chamber, a mixture chamber and a throat cavity connecting the intake chamber and the mixture chamber on the carburetor body; a choke valve assembly for controlling air to enter the throat cavity is arranged in the intake chamber, and the choke valve assembly comprises a choke valve and a choke valve shaft installed at the air inlet on the carburetor body; a throttle valve assembly for controlling the mixed gas to enter the engine is arranged in the mixture chamber, and the throttle valve assembly comprises a throttle valve and a throttle valve shaft installed in the mixture chamber on the carburetor body; an air storage chamber and an intake pipe connected to the air storage chamber are arranged on the carburetor body, an air intake regulating channel is arranged between the air storage chamber and the throat cavity, an adjusting member capable of changing the intake flow of the air intake regulating channel is arranged in the air storage chamber, a linkage mechanism is arranged between the throttle valve assembly and the adjusting member, one end of the linkage mechanism is linked to the throttle shaft, and the other end of the linkage mechanism is linked to the adjusting member.

[0007] As a preferred technical solution of the utility model, the adjusting member is rotatably installed in the air intake adjusting channel, and a variable flow area that can flow to the throat cavity is formed between the part of the adjusting member located in the air intake adjusting channel and the inner wall of the air intake adjusting channel. A vent hole connected to the air storage cavity is provided on the air intake adjusting channel corresponding to the position of the variable flow area. The adjusting member can be rotated and displaced as the throttle opening changes under the drive of the linkage mechanism, and the intake flow rate is adjusted by adjusting the relative position of the variable flow area and the vent hole.

[0008] As a preferred technical solution of the utility model, a mounting portion is integrated or fixed in the air storage chamber, a through hole is provided in the mounting portion and the through hole forms the above-mentioned air intake regulating channel, the air vent is opened on the side wall of the mounting portion, the regulating member has a rotating shaft section rotatably mounted on the air intake regulating channel, the rotating shaft section includes a turntable portion adapted to the shape of the through hole and an extension portion formed by the turntable portion extending downward, a notch is provided on the side of the extension portion and the above-mentioned variable flow area is formed between the notch and the inner wall of the through hole.

[0009] As a preferred technical solution of the present utility model, the extension portion is a semi-cylinder.

[0010] As a preferred technical solution of the utility model, the air storage chamber is arranged above the carburetor body and the air storage chamber corresponds to the position of the throat cavity. The carburetor body is also provided with a cover plate for closing the air storage chamber. The carburetor body is provided with a sealing groove located on the outer periphery of the air storage chamber, and a sealing ring is embedded in the sealing groove. The cover plate is tightened to the carburetor body by bolts.

[0011] As a preferred technical solution of the utility model, a normally open main air inlet passage is also provided in the air storage chamber.

[0012] As a preferred technical solution of the utility model, the linkage mechanism includes a linkage arm, a linkage sleeve, a swing arm and a movable pin. The throttle shaft is sleeved with a linkage sleeve, the swing arm is fixedly connected to the side wall of the linkage sleeve, a long groove is provided on the swing arm, one end of the linkage arm is connected to the adjusting piece, the movable pin is provided at the other end of the linkage arm and the movable pin is slidably connected in the long groove.

[0013] As a preferred technical solution of the utility model, a limit arm is further provided on the linkage sleeve, and limit seats located on both sides of the limit arm are provided on the carburetor body, and the two limit seats are located on the swing path of the limit arm.

[0014] As a preferred technical solution of the utility model, at least one of the limit seats is provided with an adjusting bolt, and the inner end of the adjusting bolt corresponds to the limit arm.

[0015] As a preferred technical solution of the utility model, an idle gas channel is provided on one side of the carburetor body corresponding to the throttle valve assembly.

[0016] Compared with the prior art, the utility model has the following beneficial effects: a linkage mechanism is provided between the throttle valve assembly and the choke valve assembly, so that the movement of the throttle valve assembly can drive the adjusting member to rotate, and the intake flow rate of the intake adjusting channel can be changed when the adjusting member is rotated to different positions, thereby improving the accuracy and sensitivity of the intake amount of the carburetor, and being able to adjust the intake flow rate as the throttle opening changes, providing sufficient mixed gas to flow to the engine, and ensuring the smooth operation of the engine. The specific working method is: the liquefied gas enters the throat cavity from the intake pipe, and flows to the intake adjusting channel through the vent hole. When the adjusting member is rotated to different positions, the relative position of the variable flow area and the vent hole will also change, so that the vent hole has three states of fully closed, fully open and partially open (the area of ​​the vent hole depends on the rotation angle of the adjusting member). The air enters the intake chamber from the choke valve and forms a mixed gas with the liquefied gas entering the throat cavity, and the mixed gas flows from the throttle valve to the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of one side of the air blocking valve assembly of the utility model;

[0018] Figure 2 It is a front view of the utility model;

[0019] Figure 3 It is a cross-sectional view of AA of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the utility model;

[0021] Figure 5 yes Figure 4 Enlarged view of part A;

[0022] Figure 6 It is a top view of the utility model without the cover plate;

[0023] Figure 7 It is a structural schematic diagram of one side of the throttle valve assembly of the utility model;

[0024] Figure 8 It is a side view of the utility model;

[0025] Fig. 9 It is a cross-sectional view of BB of the utility model;

[0026] Fig.10 It is a structural schematic diagram of the adjusting member in the utility model.

[0027] Figure numerals: 1. carburetor body; 2. intake chamber; 3. mixture chamber; 4. throat cavity; 5. choke valve assembly; 6. choke; 7. choke shaft; 8. throttle valve assembly; 9. throttle; 10. throttle shaft; 11. intake pipe; 12. air storage chamber; 13. intake adjustment channel; 14. adjusting member; 15. linkage mechanism; 16. variable flow area; 17. vent; 18. mounting portion; 19. shaft section; 20. turntable portion; 21. extension portion; 22. notch; 23. cover plate; 24. sealing groove; 25. sealing ring; 26. main intake channel; 27. linkage arm; 28. linkage sleeve; 29. ​​swing arm; 30. movable pin; 31. long groove; 32. limit seat; 33. adjusting bolt; 34. idle gas channel; 35. limit arm. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects of the utility model easier to understand, the utility model is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0029] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0030] like Figures 1 to 10The carburetor with an intake flow regulating function shown in the figure comprises a carburetor body 1, on which an intake chamber 2, a mixed air chamber 3 and a throat cavity 4 connecting the intake chamber 2 and the mixed air chamber 3 are arranged; the intake chamber 2 is provided with a choke valve assembly 5 for controlling the air to enter the throat cavity 4, and the choke valve assembly 5 comprises a choke valve 6 and a choke valve shaft 7 installed at the air inlet of the carburetor body 1; the mixed air chamber 3 is provided with a throttle valve assembly 8 for controlling the mixed air to enter the engine, and the throttle valve assembly 8 comprises a throttle valve assembly 8 installed at the carburetor body 1, and a throttle valve assembly 8 is installed at the carburetor body 1. The carburetor body 1 includes a throttle 9 and a throttle shaft 10 of a mixing air chamber 3, an air storage chamber 12 and an intake pipe 11 connected to the air storage chamber 12, an air intake regulating passage 13 is provided between the air storage chamber 12 and the throat chamber 4, an adjusting member 14 capable of changing the air intake flow rate of the air intake regulating passage 13 is provided in the air storage chamber 12, a linkage mechanism 15 is provided between the throttle valve assembly 8 and the adjusting member 14, one end of the linkage mechanism 15 is linked to the throttle shaft 10, and the other end of the linkage mechanism 15 is linked to the adjusting member 14.

[0031] The adjusting member 14 is rotatably installed in the air intake adjusting channel 13. The adjusting member 14 is located in the part of the air intake adjusting channel 13 and the inner wall of the air intake adjusting channel 13 to form a variable flow area 16 that can flow to the throat cavity 4. The air intake adjusting channel 13 is provided with a vent hole 17 connected to the air storage cavity 12 at a position corresponding to the variable flow area 16. The adjusting member 14 can be rotated and displaced as the throttle valve 9 opens under the drive of the linkage mechanism 15, and the intake flow rate can be adjusted by adjusting the relative position of the variable flow area 16 and the vent hole 17.

[0032] A mounting portion 18 is integrated or fixed in the air storage chamber 12, a through hole is provided in the mounting portion 18 and the through hole forms the above-mentioned air intake regulating channel 13, and the vent hole 17 is provided on the side wall of the mounting portion 18, and the regulating member has a rotating shaft section 19 rotatably mounted on the air intake regulating channel 13, the rotating shaft section 19 includes a turntable portion 20 adapted to the shape of the through hole and an extension portion 21 formed by the turntable portion 20 extending downward, the extension portion 21 in this embodiment is a semi-cylinder, a notch 22 is provided on the side of the extension portion 21 and the above-mentioned variable flow area 16 is formed between the notch 22 and the inner wall of the through hole, the variable flow area 16 in this embodiment is determined based on the shape of the extension portion 21, and there is always a variable flow area 16 between the extension portion 21 and the air intake regulating channel 13, and only by rotating the regulating member 14 can the variable flow area 16 be directed toward or away from the vent hole 17.

[0033] The air storage chamber 12 is arranged above the carburetor body 1 and the air storage chamber 12 corresponds to the throat chamber 4. The carburetor body 1 is also provided with a cover plate 23 for closing the air storage chamber 12. The carburetor body 1 is provided with a sealing groove 24 located on the outer periphery of the air storage chamber 12. The sealing groove 24 is embedded with a sealing ring 25. The cover plate 23 is tightened to the carburetor body 1 by bolts.

[0034] A normally open main air intake passage 26 is also provided in the air storage chamber 12. After the liquefied gas enters the air intake pipe 11, it enters the air storage chamber 12 and flows to the throat cavity 4 through the air intake regulating passage 13 and the main air intake passage 26 respectively. During this process, the main air intake passage 26 is always in a normally open state. Even if the air intake regulating passage 13 is closed, the air can enter the throat cavity 4 through the main air intake passage 26. If the opening of the throttle valve 9 does not reach a certain angle, the air vent 17 of the air intake regulating passage 13 can also be in a fully closed state.

[0035] The linkage mechanism 15 includes a linkage arm 27, a linkage sleeve 28, a swing arm 29 and a movable pin 30. The throttle shaft 10 is sleeved with a linkage sleeve 28, and the swing arm 29 is fixedly connected to the side wall of the linkage sleeve 28. A long slot 31 is provided on the swing arm 29. One end of the linkage arm 27 is connected to the adjusting member 14, and the movable pin 30 is provided at the other end of the linkage arm 27 and the movable pin 30 is slidably connected in the long slot 31. The linkage sleeve 28 in this embodiment is linked to the locomotive through a connecting rod. This is a prior art, so it is not specifically explained. The specific method is: the linkage sleeve 28 rotates to drive the throttle shaft 10 to rotate. During this process, the movable pin 30 of the linkage arm 27 slides in the long slot 31, so that the other end of the linkage arm 27 drives the adjusting member 14 to rotate.

[0036] A limit arm 35 is also provided on the linkage sleeve 28, and a limit seat 32 located on both sides of the limit arm 35 is provided on the carburetor body 1. The two limit seats 32 are located on the swing path of the limit arm 35. An adjusting bolt 33 is provided on at least one of the limit seats 32, and the inner end of the adjusting bolt 33 corresponds to the limit arm 35.

[0037] An idle gas passage 34 is provided on the carburetor body 1 at one side corresponding to the throttle valve assembly 8, so as to ensure that the mixed gas still flows to the engine even in the idle state.

[0038] Working principle: A linkage mechanism 15 is arranged between the throttle valve assembly 8 and the choke valve assembly 5, so that the movement of the throttle valve assembly 8 can drive the adjusting member 14 to rotate. When the adjusting member 14 rotates to different positions, the intake flow rate of the intake regulating channel 13 can be changed, thereby improving the accuracy and sensitivity of the intake amount of the carburetor, and being able to adjust the intake flow rate as the opening of the throttle valve 9 changes, providing sufficient mixed gas to flow to the engine, and ensuring the smooth operation of the engine. The specific working method is: the liquefied gas enters the throat cavity 4 from the intake pipe 11, and flows to the intake regulating channel 13 through the vent 17. When the adjusting member 14 rotates to different positions, the relative position of the variable flow area 16 and the vent 17 will also change, so that the vent 17 has three states of fully closed, fully open and partially open (the area of ​​the vent 17 depends on the rotation angle of the adjusting member 14). The air enters the intake chamber 2 from the choke valve 6 to form a mixed gas with the liquefied gas entering the throat cavity 4, and the mixed gas flows from the throttle valve 9 to the engine.

[0039] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A carburetor with an intake flow regulating function, comprising a carburetor body (1), the carburetor body (1) being provided with an intake chamber (2), a mixed air chamber (3) and a throat cavity (4) communicating the intake chamber (2) and the mixed air chamber (3); a choke valve assembly (5) for controlling air to enter the throat cavity (4) is arranged in the intake chamber (2), the choke valve assembly (5) comprising a choke valve (6) and a choke valve shaft (7) mounted at an air inlet on the carburetor body (1); a throttle valve assembly (8) for controlling mixed air to enter an engine is arranged in the mixed air chamber (3), the throttle valve assembly (8) comprising a throttle valve (9) and a throttle valve shaft (10) mounted in the mixed air chamber (3) on the carburetor body (1), characterized in that: The carburetor body (1) is provided with an air storage chamber (12) and an air intake pipe (11) connected to the air storage chamber (12); an air intake regulating passage (13) is provided between the air storage chamber (12) and the throat chamber (4); an adjusting member (14) capable of changing the air intake flow rate of the air intake regulating passage (13) is provided in the air storage chamber (12); a linkage mechanism (15) is provided between the throttle valve assembly (8) and the adjusting member (14); one end of the linkage mechanism (15) is linked to the throttle shaft (10); and the other end of the linkage mechanism (15) is linked to the adjusting member (14).

2. The carburetor with intake flow regulating function according to claim 1, characterized in that: The regulating member (14) is rotatably mounted in the air intake regulating passage (13); a variable flow area (16) is formed between the portion of the regulating member (14) located in the air intake regulating passage (13) and the inner wall of the air intake regulating passage (13) so that air can flow toward the throat cavity (4); a vent hole (17) communicating with the air storage cavity (12) is arranged on the air intake regulating passage (13) at a position corresponding to the variable flow area (16); the regulating member (14) can be rotated and displaced as the opening of the throttle valve (9) changes under the drive of the linkage mechanism (15); and the air intake flow rate is adjusted by adjusting the relative position of the variable flow area (16) and the vent hole (17).

3. The carburetor with air intake flow regulating function according to claim 2, characterized in that: The air storage chamber (12) is integrally or fixedly provided with a mounting portion (18), the mounting portion (18) is provided with a through hole and the through hole forms the above-mentioned air intake regulating channel (13), the air vent (17) is provided on the side wall of the mounting portion (18), the regulating member (14) has a rotating shaft section (19) rotatably mounted on the air intake regulating channel (13), the rotating shaft section (19) comprises a rotating disk section (20) adapted to the shape of the through hole and an extension section (21) formed by extending downward from the rotating disk section (20), a notch (22) is provided on the side of the extension section (21), and the above-mentioned variable flow area (16) is formed between the notch (22) and the inner wall of the through hole.

4. The carburetor with intake flow regulating function according to claim 3, characterized in that: The extension portion (21) is a semi-cylinder.

5. The carburetor with intake flow regulating function according to claim 1, characterized in that: The air storage chamber (12) is arranged above the carburetor body (1) and the air storage chamber (12) corresponds to the position of the throat chamber (4). The carburetor body (1) is also provided with a cover plate (23) for closing the air storage chamber (12). The carburetor body (1) is provided with a sealing groove (24) located on the outer periphery of the air storage chamber (12). The sealing groove (24) is embedded with a sealing ring (25). The cover plate (23) is tightened to the carburetor body (1) by bolts.

6. The carburetor with intake flow regulating function according to claim 1, characterized in that: A normally open main air inlet passage (26) is also provided in the air storage chamber (12).

7. The carburetor with intake flow regulating function according to claim 1, characterized in that: The linkage mechanism (15) comprises a linkage arm (27), a linkage sleeve (28), a swing arm (29) and a movable pin (30); the linkage sleeve (28) is sleeved on the throttle shaft (10); the swing arm (29) is fixedly connected to the side wall of the linkage sleeve (28); a long slot (31) is provided on the swing arm (29); one end of the linkage arm (27) is connected to the adjusting member (14); the movable pin (30) is provided at the other end of the linkage arm (27) and the movable pin (30) is slidably connected in the long slot (31).

8. The carburetor with intake flow regulating function according to claim 7, characterized in that: The linkage sleeve (28) is also provided with a limit arm (35), and the carburetor body (1) is provided with limit seats (32) located on both sides of the limit arm (35), and the two limit seats (32) are located on the swing path of the limit arm (35).

9. The carburetor with intake flow regulating function according to claim 8, characterized in that: At least one of the limiting seats (32) is provided with an adjusting bolt (33), and the inner end of the adjusting bolt (33) corresponds to the limiting arm (35).

10. The carburetor with intake flow regulating function according to claim 1, characterized in that: An idle gas passage (34) is provided on one side of the carburetor body (1) corresponding to the throttle valve assembly (8).

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