Carburetor with acceleration pump

Abstract

The utility model belongs to the field of carburetors, and provides a carburetor with an acceleration pump, which comprises a body, a main nozzle and a plunger. Wherein the body forms an oil-gas mixing channel; the main nozzle is installed on the body and used for spraying oil into the oil-gas mixing channel. The main nozzle is further provided with an oil inlet hole used for oil feeding. The plunger is movably connected to the body and matched with the body to form a volume-variable sealing cavity, and an auxiliary oil way communicated with the sealing cavity and the oil inlet hole is further formed in the body.

Description

Technical Field

[0001] The present application belongs to the field of carburetors, and more specifically, relates to a carburetors with an accelerator pump. Background Art

[0002] As an important component of a gasoline engine, the carburetor's main function is to mix gasoline and air in a certain proportion to form a mixture suitable for combustion, so that the engine can operate stably under different working conditions. However, traditional carburetors face many defects during use. For example, when the gasoline engine is accelerated, the throttle opening needs to be increased to increase the air intake in the oil-gas mixing channel, but this will cause the concentration of combustible gas in the oil-gas mixing channel to decrease and cause the carburetor to perform poorly during the gasoline engine acceleration process. Therefore, it is necessary to solve the above technical problems. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a carburetor with an accelerator pump to solve the technical problem in the prior art that the carburetor has poor performance during the engine acceleration process.

[0004] To achieve the above purpose, the technical solution adopted by the present application is: to provide a carburetor with an accelerator pump, comprising:

[0005] The main body forms an oil-gas mixing channel;

[0006] A main nozzle, mounted on the body and used for spraying oil into the oil-gas mixing channel, the main nozzle also having an oil inlet hole for oil intake;

[0007] and, a throttle valve disposed in the oil-gas mixing passage and used for adjusting the air intake amount of the oil-gas mixing passage, and a throttle shaft drivingly connected to the throttle valve and used for driving the throttle valve;

[0008] A plunger is movably connected to the body and cooperates with the body to form a sealed cavity with a variable volume, and an auxiliary oil path connecting the sealed cavity and the oil inlet hole is also formed on the body;

[0009] The throttle shaft is also drivingly connected to the plunger and is used to link the plunger to the throttle.

[0010] Optionally, the carburetor with accelerator pump further comprises a spring disposed in the sealing chamber;

[0011] The spring abuts against the plunger and causes the sealing chamber to have a tendency to increase in volume.

[0012] Optionally, the surface of the throttle shaft is recessed along its radial direction to form a notch adapted to the plunger, and the side of the throttle shaft where the notch is provided and the side away from the notch can alternately abut against the plunger.

[0013] Optionally, the carburetor with an accelerator pump further comprises a filter plate disposed in the sealed cavity, wherein the filter plate is adapted to a communication interface between the auxiliary oil circuit and the sealed cavity and is used to prevent impurities from entering the sealed cavity.

[0014] Optionally, the carburetor with an accelerator pump further comprises a sealing ring coaxially sleeved on the plunger, and the plunger is sealingly connected to the body via the sealing ring.

[0015] Optionally, an angle of 45° is formed between a parting surface during compression molding of the sealing ring and a central axis of the sealing ring.

[0016] Optionally, the notch is oriented parallel to the throttle plate surface, and the notch faces away from the plunger when the throttle is in a maximum opening position.

[0017] The beneficial effect of the carburetor with an accelerator pump provided by the present application is that: compared with the prior art, a plunger movably connected to the body is provided in the carburetor with an accelerator pump of the present application, and the plunger cooperates with the body to form a sealed chamber with a variable volume and connects the sealed chamber and the oil inlet hole of the main nozzle through an auxiliary oil path. When the throttle is opened and the air intake in the oil-gas mixing channel is increased, the volume of the sealed chamber can be reduced by moving the plunger relative to the body, and the fuel in the sealed chamber can be supplemented to the main nozzle through the auxiliary oil path and the oil inlet hole to increase the fuel spraying amount, which is beneficial to significantly improve the performance of the carburetor. When the throttle opening is reduced, the volume of the sealed chamber can be increased by moving the plunger and a negative pressure can be formed in the sealed chamber, so that the fuel in the external fuel tank can be supplemented to the sealed chamber through the auxiliary oil path and the carburetor with an accelerator pump in the present application can be circulated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic cross-sectional view of a carburetor with an accelerator pump provided in an embodiment of the present application Figure 1 ;

[0020] Figure 2 A schematic cross-sectional view of a carburetor with an accelerator pump provided in an embodiment of the present application Figure 2 ;

[0021] Figure 3A schematic cross-sectional view of a carburetor with an accelerator pump provided in an embodiment of the present application Figure 3 ;

[0022] Figure 4 A schematic cross-sectional view of a carburetor with an accelerator pump provided in an embodiment of the present application Figure 4 ;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the sealing ring provided in an embodiment of the present application.

[0024] Among them, the figure marks in the figure are: 101, main body; 102, oil-gas mixing channel; 103, main nozzle; 104, oil inlet hole; 105, plunger; 106, sealing chamber; 107, auxiliary oil circuit; 108, spring; 109, throttle; 110, throttle shaft; 111, notch; 112, filter plate; 113, sealing ring; 114, parting surface. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] Please also read Figures 1 to 5Now, a carburetor with an accelerator pump provided in an embodiment of the present application is described. The carburetor with an accelerator pump comprises a body 101, a main nozzle 103 and a plunger 105. Among them:

[0030] The body 101 forms an oil-gas mixing passage 102, a main nozzle 103 is mounted on the body 101 and is used to spray oil into the oil-gas mixing passage 102, the main nozzle 103 also has an oil inlet hole 104 for oil intake, a throttle valve 109 arranged in the oil-gas mixing passage 102 and used to adjust the air intake amount of the oil-gas mixing passage 102, and a throttle shaft 110 that is transmission-connected to the throttle valve 109 and is used to drive the throttle valve 109;

[0031] The plunger 105 is movably connected to the body 101 and cooperates with the body 101 to form a sealed cavity 106 with a variable volume. The body 101 also forms an auxiliary oil passage 107 connecting the sealed cavity 106 and the oil inlet hole 104.

[0032] The throttle shaft 110 is also drivingly connected to the plunger 105 and is used to link the plunger 105 to the throttle 109 .

[0033] According to the above structure provided in this embodiment, since the plunger 105 movably connected to the body 101 is provided in the carburetor with the accelerator pump in this embodiment, the plunger 105 cooperates with the body 101 to form a sealed chamber 106 with a variable volume and connects the sealed chamber 106 with the oil inlet hole 104 of the main nozzle 103 through the auxiliary oil path 107, here, the plunger 105 and the sealed chamber 106 constitute a plunger pump structure, that is, the accelerator pump of this technical solution. When the throttle 109 is opened and the air intake in the oil-gas mixing channel 102 is increased, the volume of the sealed chamber 106 can be reduced by moving the plunger 105 relative to the body 101, and the fuel in the sealed chamber 106 can be supplemented to the main nozzle 103 through the auxiliary oil path 107 and the oil inlet hole 104 to increase the amount of fuel sprayed, which is conducive to significantly improving the performance of the carburetor. When the opening of the throttle valve 109 is reduced, the volume of the sealed chamber 106 can be increased by moving the plunger 105 and a negative pressure can be formed in the sealed chamber 106, so that the fuel in the external fuel tank can be replenished into the sealed chamber 106 through the auxiliary oil circuit 107, and the fuel in the sealed chamber 106 of the carburetor with an accelerator pump in the present application can be recycled during the next acceleration. Here, it can be understood that the auxiliary oil circuit 107 and the oil inlet hole 104 can share an oil circuit supplied from an external fuel tank, that is, the auxiliary oil circuit 107 bypass is arranged at the inlet end of the oil inlet hole 104, and the oil circuit supplying oil to the oil inlet hole 104 is the existing carburetor technology.

[0034] According to the above structure provided in this embodiment, the throttle shaft 110 for controlling the opening of the throttle valve 109 is connected to the plunger 105 in a transmission manner, which is beneficial for the plunger 105 to be better linked to the throttle valve 109 and to realize the operation of replenishing the oil supply to the main nozzle 103 when the throttle valve 109 is opened, so that the engine has a good acceleration performance.

[0035] In another embodiment of the present application, please refer to Figures 1 to 5 The carburetor with an accelerator pump further includes a spring 108 disposed in the sealed chamber 106, the spring 108 abuts against the plunger 105 and makes the sealed chamber 106 have a tendency to increase in volume. According to the above structure provided in this embodiment, when the external force is removed from one end of the plunger 105 away from the sealed chamber 106, the spring 108 disposed in the sealed chamber 106 can be used to abut against the plunger 105 and reset the plunger 105, which is conducive to better ensuring that the fuel in the sealed chamber 106 of the carburetor with an accelerator pump in this embodiment can be circulated.

[0036] In another embodiment of the present application, please refer to Figures 1 to 5 The surface of the throttle shaft 110 is recessed along its radial direction to form a notch 111 adapted to the plunger 105, and the side of the throttle shaft 110 provided with the notch 111 and the side away from the notch 111 can alternately abut against the plunger 105, wherein the notch 111 is parallel to the plate surface of the throttle 109, and when the throttle 109 is at the maximum opening position, the notch 111 is away from the plunger 105. According to the above structure provided in the present embodiment, when the throttle shaft 110 abuts against the plunger 105 through one side of the notch 111, the plunger 105 will move away from the bottom of the sealing chamber 106 under the action of the spring 108 in the sealing chamber 106, thereby increasing the volume of the sealing chamber 106; and when the throttle shaft 110 abuts against the plunger 105 through the side away from the notch 111, the plunger 105 can be driven to move toward the bottom of the sealing chamber 106 and reduce the volume of the sealing chamber 106, that is, when the opening of the throttle 109 changes from small to large, that is, when the speed is increased, the notch 111 will gradually move away from the plunger 105, thereby pushing the plunger 105 forward, reducing the volume of the sealing chamber 106, and the fuel therein will return from the auxiliary oil circuit 107 to the oil inlet hole 104 to merge with the normal oil inlet and be supplied to the main nozzle 103 through the oil inlet hole 104, thereby increasing the fuel supply when the speed is increased. By directly connecting the throttle shaft 110 to the plunger 105 , better linkage performance between the throttle 109 and the plunger 105 can be achieved.

[0037] In another embodiment of the present application, please refer to Figures 1 to 5The carburetor with an accelerator pump further includes a filter plate 112 disposed in the sealed cavity 106. The filter plate 112 is adapted to the communication interface between the auxiliary oil circuit 107 and the sealed cavity 106 and is used to prevent impurities from entering the sealed cavity 106. According to the above structure provided in this embodiment, the filter plate 112 can effectively filter impurities in the auxiliary oil circuit 107, thereby preventing impurities in the fuel from entering the sealed cavity 106, which is conducive to enabling the carburetor with an accelerator pump in this embodiment to operate stably for a long time.

[0038] In another embodiment of the present application, please refer to Figures 1 to 5 The carburetor with an accelerator pump further comprises a sealing ring 113 coaxially sleeved on the plunger 105, and the plunger 105 is sealed and connected to the body 101 through the sealing ring 113. According to the above structure provided in this embodiment, the sealing ring 113 can significantly improve the sealing performance between the plunger 105 and the body 101, which is conducive to the long-term and stable operation of the carburetor with an accelerator pump in this embodiment.

[0039] In another embodiment of the present application, please refer to Figures 1 to 5 , the parting surface 114 of the sealing ring 113 during compression molding forms an angle of 45° with the central axis of the sealing ring 113. According to the above structure provided in this embodiment, since the injection-molded sealing ring 113 is prone to burrs and flash at the position of the parting surface 114, setting the parting surface 114 of the sealing ring 113 to have an angle of 45° with the central axis of the sealing ring 113 is conducive to making the position where the sealing ring 113 contacts the body 101 and the plunger 105 avoid the parting surface 114 of the sealing ring 113, thereby significantly improving the sealing performance between the plunger 105 and the body 101, which is conducive to further improving the sealing performance between the plunger 105 and the body 101.

[0040] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A carburetor with an accelerator pump, comprising: A body (101) forms an oil-gas mixing passage (102); A main nozzle (103) is mounted on the body (101) and is used to spray oil into the oil-gas mixing channel (102); the main nozzle (103) also has an oil inlet hole (104) for oil inlet; and, a throttle valve (109) disposed in the oil-gas mixing passage (102) and used for adjusting the air intake amount of the oil-gas mixing passage (102), and a throttle shaft (110) drivingly connected to the throttle valve (109) and used for driving the throttle valve (109); It is characterized by further comprising: A plunger (105) is movably connected to the body (101) and cooperates with the body (101) to form a sealed cavity (106) with a variable volume. The body (101) also forms an auxiliary oil passage (107) communicating with the sealed cavity (106) and the oil inlet hole (104); The throttle shaft (110) is also drivingly connected to the plunger (105) and is used to enable the plunger (105) to be linked to the throttle (109).

2. The carburetor with an accelerator pump as claimed in claim 1, characterized in that: The carburetor with an accelerator pump further comprises a spring (108) disposed in the sealing chamber (106); The spring (108) abuts against the plunger (105) and causes the sealed chamber (106) to have a tendency to increase in volume.

3. The carburetor with an accelerator pump as claimed in claim 2, characterized in that: The surface of the throttle shaft (110) is recessed along its radial direction to form a notch (111) adapted to the plunger (105); a side of the throttle shaft (110) provided with the notch (111) and a side facing away from the notch (111) can alternately abut against the plunger (105).

4. The carburetor with an accelerator pump as claimed in claim 1, characterized in that: The carburetor with an accelerator pump further comprises a filter plate (112) arranged in the sealed cavity (106); the filter plate (112) is adapted to the communication interface between the auxiliary oil circuit (107) and the sealed cavity (106) and is used to prevent impurities from entering the sealed cavity (106).

5. The carburetor with an accelerator pump as claimed in claim 1, characterized in that: The carburetor with an accelerator pump further comprises a sealing ring (113) coaxially sleeved on the plunger (105); the plunger (105) is sealingly connected to the body (101) via the sealing ring (113).

6. The carburetor with an accelerator pump as claimed in claim 5, characterized in that: When the sealing ring (113) is molded, a parting surface (114) and a central axis of the sealing ring (113) form an angle of 45°.

7. The carburetor with an accelerator pump as claimed in claim 3, characterized in that: The notch (111) is oriented parallel to a plate surface of the throttle valve (109), and when the throttle valve (109) is at a maximum opening position, the notch (111) faces away from the plunger (105).

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