Dynamic positioning device for carburetor transition hole
Patent Information
- Application Number
- CN202522271313.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-10-28
AI Technical Summary
这将使得，当化油器过渡孔进入的空气流量，造成化油器加速时空燃比的不确定性，容易在发动机加速时造成不均匀，无法达到低碳排放，甚至会引发飞车等危险事故
1、现有技术以节气门片自然关闭状态做为怠速点，造成每个化油器怠速时空燃比不一致。本实用新型通过微调节气门片的角度，使每个化油器腔体都在一个统一的负压值作为怠速点，统一了每个化油器怠速点时真实的空燃比值，由于保证了怠速时空燃比的一致性，使化油器工作时，更好的降低排放，能大量节省能源，以及改善环境，做到真正的低碳排放。
Smart Images
Figure CN224919358U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to engine technology, specifically a dynamic positioning device for a carburetor transition hole. Background Technology
[0002] A carburetor is a mechanical device that mixes gasoline and air in a certain proportion under the vacuum generated by the engine.
[0003] To prevent engine vibration and uneven acceleration, a small intake hole is drilled near the edge of the throttle body (the distance from the edge is determined according to process requirements) when the carburetor is idling. This is known in the industry as point P-1, used to slowly increase airflow. When the engine accelerates, the throttle body rotates past this small intake hole, increasing the airflow slightly and ensuring a smooth transition from idle to acceleration.
[0004] In existing technology, the edge position of the throttle valve in the naturally closed state (i.e., idle point) of each carburetor is detected by a photoelectric switch, and then a transition hole is drilled next to the edge of the throttle valve (the distance is set according to process requirements). The drawback is that, due to manufacturing errors in the throttle valve and assembly errors in the carburetor body, the vacuum pressure inside the carburetor chamber at idle will be different for each carburetor in the naturally closed state (although the reference point is the naturally closed throttle valve, the gap between the throttle valve and each carburetor chamber may be different). This results in different airflow rates; in other words, the actual air-fuel ratio at idle point is different for each carburetor.
[0005] In short, in existing technology, the throttle body is in an idle state when it is naturally closed. A photoelectric switch detects the edge of the throttle body, and the drilling position of the transition hole is defined using this position as a reference point. This causes uncertainty in the airflow entering the carburetor through the transition hole, resulting in an uneven air-fuel ratio during carburetor acceleration. This can easily lead to uneven acceleration, failing to achieve low carbon emissions, and even potentially causing dangerous accidents such as runaway engines. Utility Model Content
[0006] To address the technical problems existing in the prior art, this utility model provides a dynamic positioning device for a carburetor transition hole. By finely adjusting the angle of the valve plate, each carburetor chamber is positioned at a uniform negative pressure value as the idle point, thus unifying the actual air-fuel ratio at the idle point of each carburetor. By ensuring the consistency of the air-fuel ratio at idle, the carburetor can better reduce emissions during operation, saving a significant amount of energy and improving the environment, achieving true low-carbon emissions.
[0007] The technical solution adopted by this utility model is: a dynamic positioning device for a carburetor transition hole, including a telescopic push rod and a throttle plate located in the carburetor cavity; The throttle body is rotated by pushing against the retractable push rod, which adjusts the angle of the throttle body and changes the gap between the throttle body and the carburetor chamber, increasing the air flow into the carburetor chamber until the negative pressure value in the carburetor chamber reaches the negative pressure value set at idle speed. The position of the transition hole is determined with the edge of the throttle body as a reference point.
[0008] Preferably, the dynamic positioning device further includes a slide table, and the carburetor is mounted on the slide table; When the slide carrying the carburetor moves toward the position of the telescopic push rod, the telescopic push rod rotates against the throttle plate.
[0009] Preferably, the dynamic positioning device further includes a cylinder for pressing the carburetor.
[0010] Preferably, the end face of the carburetor is in close sealing contact with the simulated end face of the engine.
[0011] Compared with the prior art, the technical effects achieved by this utility model include: 1. Existing technology uses the throttle body's naturally closed state as the idle point, resulting in inconsistent air-fuel ratios at idle for each carburetor. This invention, by finely adjusting the valve angle, ensures that each carburetor chamber operates at a uniform negative pressure value as the idle point, thus standardizing the actual air-fuel ratio at idle for each carburetor. Because this consistency in the air-fuel ratio at idle is guaranteed, carburetor emissions are reduced more effectively during operation, resulting in significant energy savings and environmental improvements, achieving true low-carbon emissions.
[0012] 2. The telescopic push rod in the dynamic positioning device of this utility model rotates the throttle plate and dynamically finds the reference point of the transition hole (i.e., the edge position of the throttle plate at this time, which is different for each carburetor) when the negative pressure value at the idle point is monitored in real time; unlike the traditional technology where the edge position of the throttle plate is used as the reference point when the throttle plate is in the naturally closed state.
[0013] 3. This utility model uses a flow detection device as a negative pressure testing device to measure the idling negative pressure in the carburetor cavity in real time, so that the air flow entering each carburetor at the idling point is consistent, eliminating the machining error of the throttle plate and the assembly error of the carburetor body. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the carburetor body. Figure 2 This is a schematic diagram of the dynamic positioning device for the carburetor transition hole in an embodiment of this utility model. Detailed Implementation
[0015] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto. Example
[0016] like Figure 1 , Figure 2 As shown, the retractable push rod 202 pushes against the rotatable throttle plate 103, causing the throttle plate to rotate and finely adjust its angle. Simultaneously, this changes the gap between the throttle plate and the carburetor chamber 105. When the gap changes, the air flowing into the carburetor chamber increases. At the same time, the negative pressure within the carburetor chamber 105 is monitored in real time. When the negative pressure reaches the preset value required for idle speed, a transition hole 101 is set with the edge of the throttle plate 102 as a reference point. The distance between the transition hole and the edge of the throttle plate is set according to actual process requirements.
[0017] In other words, this invention adopts a dynamic positioning strategy for the transition hole. Specifically, the dynamic positioning strategy involves slowly rotating the throttle valve until the negative pressure value in each carburetor chamber reaches the idle speed set negative pressure value, and then using the position of the edge of the throttle valve at this time as a reference point to redefine the drilling position of the transition hole.
[0018] At this point, the airflow (negative pressure) in the chamber of all carburetors will be consistent at idle, meaning the air-fuel ratio will be the same. Therefore, the airflow entering through this transition orifice, when combined with the airflow at idle, will result in a uniform air-fuel ratio for all carburetors.
[0019] The working process of the dynamic positioning of the transition hole in this utility model is described as follows: 1. Seal the end face of the carburetor and the simulated end face 203 of the engine tightly, and press the carburetor with the cylinder 205; 2. The movable XY slide 207, carrying the carburetor, moves slowly in the direction of arrow 206 (towards the location of the telescopic push rod). At this time, the telescopic push rod 202 pushes against the throttle plate 103 in the carburetor cavity and slowly rotates, so that the throttle plate 103 and the carburetor cavity wall are separated by a certain gap. 3. Rotate the idle speed adjustment screw on the carburetor. At the same time, the negative pressure testing device monitors the vacuum negative pressure value of the carburetor cavity in real time through the negative pressure air intake port 201. As the XY slide moves slowly, the throttle plate rotates slightly. At this time, the gap between the throttle plate and the carburetor cavity will slowly increase, and the negative pressure value in the carburetor cavity will also increase. 4. When the negative pressure in the carburetor cavity reaches the set idle negative pressure value, the slide stops moving. The distance the XY slide moves is obtained and recorded, which is the compensation dimension A. When all carburetors have a uniform negative pressure value, the actual position of the edge of the carburetor throttle plate is used as a reference point to determine the machining position of the transition hole 204.
[0020] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.
Claims
1. A dynamic positioning device for a carburetor transition hole, characterized in that, Includes a telescopic push rod and a throttle body located inside the carburetor chamber; The throttle body is rotated by pushing against the retractable push rod, which adjusts the angle of the throttle body and changes the gap between the throttle body and the carburetor chamber, increasing the air flow into the carburetor chamber until the negative pressure value in the carburetor chamber reaches the negative pressure value set at idle speed. The position of the transition hole is determined by using the edge of the throttle body as a reference point.
2. The carburetor transition hole dynamic positioning device according to claim 1, characterized in that, The dynamic positioning device also includes a slide table, on which the carburetor is mounted; When the slide carrying the carburetor moves toward the position of the telescopic push rod, the telescopic push rod rotates against the throttle plate.
3. The carburetor transition hole dynamic positioning device according to claim 1, characterized in that, The dynamic positioning device also includes a cylinder for pressing the carburetor.
4. The carburetor transition hole dynamic positioning device according to claim 1, characterized in that, The carburetor end face is tightly sealed to the simulated engine end face.