Carburetor with anti-explosion valve

Abstract

The utility model relates to the technical field of internal combustion engines, in particular to a carburetor with an anti-explosion valve, which comprises a carburetor body, a floater chamber and a control air throttle, an air inlet pipe and a mixing chamber are arranged on the carburetor body, the control air throttle is arranged in the mixing chamber, the anti-explosion valve is further arranged on the air inlet pipe, and the floater chamber is arranged in the mixing chamber. The explosion-proof valve comprises a cover body, a diaphragm valve mechanism and a stop valve mechanism, a step-shaped containing groove is formed in the air inlet pipe, the cover body covers the containing groove to form an outer side containing cavity and an inner side containing cavity, the diaphragm valve mechanism is arranged in the outer side containing cavity, the stop valve mechanism is arranged in the inner side containing cavity, and the diaphragm valve mechanism is arranged in the inner side containing cavity. The diaphragm valve mechanism can push the stop valve mechanism to be opened and closed, and the air inlet pipe is provided with an air inlet and an air outlet which correspond to the anti-explosion valve, so that when the throttle valve is closed rapidly, the carburetor reduces the air amount, and the phenomenon that an exhaust pipe blasts due to the fact that mixed gas of an engine becomes thin is avoided.

Description

A carburetor with an explosion-proof valve Technical Field

[0001] This utility model relates to the field of internal combustion engine technology, and specifically to a carburetor with an explosion-proof valve. Background Technology

[0002] A carburetor is a mechanical device that mixes gasoline and air in a specific ratio under the vacuum created by the engine. As the "heart" of the engine, it plays a crucial role in engine operation. A complete engine system includes a starting device, an idling device, a medium-load device, a full-load device, and an acceleration device. Existing carburetors suffer from insufficient fuel supply when the throttle is suddenly increased or the engine speed is high, affecting the engine's power output. Additionally, when the engine is running at high speed and the throttle is suddenly closed rapidly, the carburetor receives too much air, resulting in an overly lean mixture entering the engine and causing backfiring from the exhaust pipe. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model provides a carburetor with an explosion-proof valve, which prevents the motorcycle from backfiring when the throttle is rapidly closed, and ensures sufficient power even at high speeds.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A carburetor with an explosion-proof valve includes a carburetor body, a float chamber, and a control throttle valve. The carburetor body is provided with an air intake pipe and a mixing chamber. The control throttle valve is located in the mixing chamber. The air intake pipe is also provided with an explosion-proof valve. The explosion-proof valve includes a cover, a diaphragm valve mechanism, and a shut-off valve mechanism. The air intake pipe is provided with a stepped receiving groove. The cover closes on the receiving groove to form an outer receiving cavity and an inner receiving cavity. The diaphragm valve mechanism is located in the outer receiving cavity, and the shut-off valve mechanism is located in the inner receiving cavity. The diaphragm valve mechanism can push the shut-off valve mechanism to open and close. The air intake pipe is provided with an air inlet and an air outlet corresponding to the explosion-proof valve.

[0006] Furthermore, the shut-off valve mechanism includes a one-way valve and a valve seat. The valve seat is located on the air intake pipe, and the one-way valve is located inside the valve seat. It abuts against the one-way valve through a diaphragm valve mechanism to adjust the distance between the one-way valve and the valve seat.

[0007] Furthermore, the diaphragm valve mechanism includes a diaphragm valve and a diaphragm spring, the diaphragm spring being disposed between the cover and the diaphragm valve, and the diaphragm valve abutting against a one-way valve.

[0008] Furthermore, the diaphragm valve includes a diaphragm body and a diaphragm valve stem, the diaphragm body being connected to a diaphragm spring, and the diaphragm valve stem abutting against a one-way valve.

[0009] Furthermore, a valve spring is provided inside the one-way valve.

[0010] Furthermore, the air intake pipe is also equipped with a high-speed fuel replenishment device, which includes a fuel replenishment circuit and an accelerator pump nozzle. The fuel replenishment circuit is connected to the float chamber and the accelerator pump nozzle, respectively. The accelerator pump nozzle extends into the air intake pipe through the air intake pipe.

[0011] Preferably, the accelerator pump nozzle extends vertically downward into the air intake pipe.

[0012] Furthermore, a high-speed adjustment unit is also provided on the air channel, which passes through the air channel and is connected to one end of the accelerator pump nozzle. The high-speed adjustment unit includes a high-speed adjustment screw and a high-speed adjustment spring, with the high-speed adjustment screw passing through the high-speed adjustment spring and connected to the accelerator pump nozzle.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] This utility model discloses a carburetor with an explosion-proof valve. An explosion-proof valve is installed on the air intake manifold. When the rider is in normal riding mode, the carburetor's throttle is open. At this time, the negative pressure in the intake manifold is less than the pressure of the thrust mechanism. The thrust mechanism pushes the valve away from the base, opening the valve. Gas enters the idle fuel circuit through the auxiliary air passage formed by the intake port, explosion-proof valve, and exhaust port. The combustible mixture is relatively lean, saving fuel and improving combustion. When the throttle is rapidly closed, the negative pressure in the intake manifold reaches its rated value, exceeding the pressure of the thrust mechanism. The valve pushes the thrust mechanism backward, closing it against the base. The valve closes, reducing the air volume in the idle air passage and enriching the idle mixture. This effectively prevents the excessively lean mixture that occurs when the throttle is rapidly closed, i.e., stalling when the throttle is suddenly released.

[0015] The carburetor with explosion-proof valve of this utility model also includes a high-speed fuel replenishment device. When the rider twists the throttle and enters the high-speed state, the high-speed fuel replenishment device starts to work. Under the action of negative pressure, fuel is discharged from the accelerator pump nozzle and enters the fuel chamber, which solves the problem of insufficient power caused by insufficient fuel supply at high speed. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the carburetor of this utility model.

[0017] Figure 2 is a schematic diagram of the structure of the carburetor of this utility model after removing the explosion-proof valve.

[0018] Figure 3 is a schematic diagram of the explosion-proof valve in Figure 1. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Embodiments

[0020] As shown in Figures 1-3, this utility model provides a carburetor with an explosion-proof valve, including a carburetor body 1, a float chamber 2, and a control throttle valve 3. The carburetor body 1 is provided with an air intake pipe 4 and a mixing chamber 5. The control throttle valve 3 is located in the mixing chamber 5. The air intake pipe 4 is also provided with an explosion-proof valve 6. The explosion-proof valve 6 includes a cover 61, a diaphragm valve mechanism, and a shut-off valve mechanism. The air intake pipe 4 is provided with a stepped receiving groove. The cover 61 covers the receiving groove 42 to form an outer receiving cavity and an inner receiving cavity. The diaphragm valve mechanism is located in the outer receiving cavity, and the shut-off valve mechanism is located in the inner receiving cavity. The diaphragm valve mechanism can push the shut-off valve mechanism to open and close. The air intake pipe 4 is provided with an air inlet and an air outlet corresponding to the explosion-proof valve 6.

[0021] When the rider is in normal riding mode, the throttle of this carburetor is open. At this time, the negative pressure in the intake manifold is less than the pressure of the diaphragm valve mechanism. The diaphragm valve mechanism pushes the shut-off valve mechanism to open, and gas enters the idle fuel circuit through the auxiliary air passage formed by the intake port, the explosion-proof valve 6, and the outlet. The combustible mixture is relatively lean, which not only saves some fuel but also improves combustion. When the throttle is closed rapidly, the negative pressure in the intake manifold reaches the rated value, which is greater than the pressure of the diaphragm valve mechanism. The diaphragm valve mechanism retracts, and the shut-off valve mechanism closes. At this time, gas cannot pass through, the amount of air in the idle air passage decreases, and the idle mixture becomes richer accordingly. This effectively prevents the mixture from becoming too lean when the throttle is closed rapidly, i.e., the stalling phenomenon when the throttle is suddenly released.

[0022] The shut-off valve mechanism includes a one-way valve 62 and a valve seat 63. The valve seat 63 is located on the air intake pipe 4. The one-way valve 62 is inside the valve seat 63. The diaphragm valve mechanism abuts against the one-way valve 62. The distance between the one-way valve 62 and the valve seat 63 is adjusted to realize the opening and closing of the one-way valve.

[0023] The diaphragm valve mechanism includes a diaphragm valve 64 and a membrane spring 65. The membrane spring 65 is disposed between the cover 61 and the diaphragm valve 64. The diaphragm valve 64 abuts against the one-way valve 62 and is pushed to move by the thrust of the membrane spring and the internal negative pressure.

[0024] In this embodiment, the diaphragm valve 64 includes a diaphragm body 641 and a diaphragm valve stem 642. The diaphragm body 641 is connected to a diaphragm spring 65, and the diaphragm valve stem 642 abuts against a one-way valve 62, thereby pushing the one-way valve 62 to move.

[0025] The cover 61 is also provided with a sealing ring 67. The sealing ring 67 is located at the sealing point between the cover 61 and the air inlet pipe 4. The sealing ring ensures the sealing of the cover and ensures that the internal pressure is not affected by the external environment, thereby enabling the explosion-proof valve to better prevent blasting.

[0026] The one-way valve 62 is provided with a valve spring 66 inside, and the two ends of the valve spring 66 abut against the inner wall of the one-way valve 62 and the receiving groove to prevent the one-way valve 62 from falling off.

[0027] The air intake pipe 4 is also equipped with a high-speed fuel replenishment device, which includes a fuel replenishment line and an accelerator pump nozzle 41. The fuel replenishment line is connected to the float chamber 2 and the accelerator pump nozzle 41 respectively. The accelerator pump nozzle 41 extends into the air intake pipe 4 through the air intake pipe 4.

[0028] When the rider twists the throttle and enters high speed mode, the high-speed fuel replenishment device starts to work. Under negative pressure, fuel is discharged from the accelerator pump nozzle 41 and enters the fuel chamber, solving the problem of insufficient power caused by insufficient fuel supply at high speed.

[0029] The accelerator pump nozzle 41 extends vertically downward into the air intake pipe 4, so that the fuel ejected from the accelerator pump nozzle 41 is subjected to the combined effects of gravity and wind force, resulting in the best atomization effect.

[0030] The air intake pipe 4 is further equipped with a high-speed adjustment unit 5, which passes through the air intake pipe 4 and is connected to one end of the accelerator pump nozzle 41. In this embodiment, the high-speed adjustment unit 5 includes a high-speed adjustment screw 51 and a high-speed adjustment spring 52. The high-speed adjustment screw 51 passes through the high-speed adjustment spring 52 and is connected to the accelerator pump nozzle 41. When the high-speed adjustment screw 51 is adjusted up and down, it controls the fuel output at the accelerator pump nozzle 41, thereby causing fuel to flow from the float chamber 2 to the accelerator pump nozzle 41 and be sprayed into the mixing chamber, thus achieving the fuel replenishment function.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the scope of this invention, technical features of the above embodiments or different embodiments can also be combined, and many other variations of different aspects of this invention as described above exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A carburetor with an anti-knock valve, characterized by, The device includes a carburetor body, a float chamber, and a throttle control valve. The carburetor body has an air intake pipe and a mixing chamber. The throttle control valve is located in the mixing chamber. The air intake pipe also has an explosion-proof valve. The explosion-proof valve includes a cover, a diaphragm valve mechanism, and a shut-off valve mechanism. The air intake pipe has a stepped receiving groove. The cover closes to the receiving groove to form an outer receiving cavity and an inner receiving cavity. The diaphragm valve mechanism is located in the outer receiving cavity, and the shut-off valve mechanism is located in the inner receiving cavity. The diaphragm valve mechanism can push the shut-off valve mechanism to open and close. The air intake pipe has an air inlet and an air outlet corresponding to the explosion-proof valve.

2. The carburetor with an explosion-proof valve as described in claim 1, characterized in that, The shut-off valve mechanism includes a one-way valve and a valve seat. The valve seat is located on the air intake pipe, and the one-way valve is inside the valve seat. The one-way valve abuts against the valve seat through a diaphragm valve mechanism to adjust the distance between the one-way valve and the valve seat.

3. The carburetor with anti-knock valve as set forth in claim 2, characterized in that, The diaphragm valve mechanism includes a diaphragm valve and a diaphragm spring. The diaphragm spring is disposed between the cover and the diaphragm valve, and the diaphragm valve abuts against a one-way valve.

4. The carburetor with an explosion-proof valve as described in claim 3, characterized in that, The diaphragm valve includes a diaphragm body and a diaphragm valve stem. The diaphragm body is connected to a diaphragm spring, and the diaphragm valve stem abuts against a one-way valve.

5. The carburetor with an explosion-proof valve as described in claim 1, characterized in that, The cover body is also provided with a sealing ring, which is located at the sealing point between the cover body and the air intake pipe.

6. The carburetor with an explosion-proof valve as described in claim 2, characterized in that, A valve spring is provided inside the one-way valve.

7. The carburetor with an explosion-proof valve as described in any one of claims 1-6, characterized in that, The air intake pipe is also equipped with a high-speed fuel replenishment device, which includes a fuel replenishment line and a pump nozzle. The fuel replenishment line is connected to the float chamber and the accelerator pump nozzle, respectively. The accelerator pump nozzle extends into the air intake pipe through the air intake pipe.

8. The carburetor with anti-knock valve as claimed in claim 7, characterized in that, The accelerator pump nozzle extends vertically downwards into the air intake pipe.

9. The carburetor with anti-knock valve as set forth in claim 7, characterized by the fact that The air intake pipe is also equipped with a high-speed adjustment unit, which passes through the air channel and is connected to one end of the accelerator pump nozzle. The high-speed adjustment unit includes a high-speed adjustment screw and a high-speed adjustment spring, with the high-speed adjustment screw passing through the high-speed adjustment spring and connected to the accelerator pump nozzle.

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