Carburetor oil saving device and engine

Abstract

The utility model discloses a carburetor oil saving device and an engine. Comprising an air inlet pipe, the air inlet pipe comprises an air inlet rubber pipe, a filter and an air inlet tuning pipe, the filter and the air inlet tuning pipe are connected to the two ends of the air inlet rubber pipe in a sealed mode respectively, the air inlet tuning pipe is connected with an air inlet of the carburetor in a sealed mode, and the length L of the air inlet pipe meets the following formula: L = 30a / 4pi n, positive pressure waves for inhibiting the atomized gasoline from being sprayed outwards are generated through the aerodynamic effect of the air inlet pipe. According to the daily cruise speed range, the length of the air inlet harmonic pipe in the carburetor oil-saving device is designed through the rotating speed of an engine, so that atomized gasoline sprayed out of the carburetor is suspended in a pipe cavity of the air inlet pipe in the working process of the engine and cannot escape into the air. Atomized gasoline of the carburetor is recycled through positive pressure waves generated by the air inlet inertia effect, and the effects of reducing oil consumption and prolonging the endurance of an engine are effectively achieved.

Description

Technical Field

[0001] This utility model relates to the field of aviation carburetors, and in particular to a carburetor fuel-saving device and an engine. Background Technology

[0002] Two-stroke piston engines for aircraft utilize a mixture of gasoline and air, which is burned and expanded within a sealed container (cylinder) to generate power. They offer advantages such as small size, light weight, high power output, simple structure, and easy operation and maintenance. Most aircraft two-stroke piston engines still employ carburetors, air cooling, and natural aspiration. Due to the characteristics of the intake mechanism in two-stroke engines, the carburetor inlet does not close when the piston begins to descend. This causes some of the atomized gasoline mixture already in the crankcase to be ejected back out of the carburetor inlet by the piston's downward motion. This mixture is then carried away by the airflow during flight, increasing fuel consumption and making it unsuitable for long-range flight operations. Utility Model Content

[0003] The purpose of this invention is to provide a carburetor fuel-saving device with high fuel efficiency and an engine including the device.

[0004] To achieve the above objectives, the first aspect of this utility model proposes a carburetor fuel-saving device, comprising an intake pipe, which includes an intake hose and a filter and an intake tuning pipe respectively sealed and connected to both ends of the intake hose. The intake tuning pipe is sealed and connected to the air intake of the carburetor. The length L of the intake pipe satisfies the following formula: L=30a / 4πn, where a is the speed of sound and n is the engine speed at which the carburetor operates. The device generates a positive pressure wave that suppresses the outward spraying of atomized gasoline through the aerodynamic effect of the intake pipe.

[0005] Preferably, the filter is a hemispherical air filter cover.

[0006] Preferably, a seal is provided between the intake tuning pipe and the carburetor intake port.

[0007] Preferably, one end of the intake hose is fitted onto the end of the intake tuning pipe furthest from the carburetor, and the intake hose and the intake tuning pipe are fastened together by a fastener.

[0008] Preferably, the air intake hose is connected to the filter via a connector.

[0009] Preferably, the inlet of the air intake hose near the filter is configured to fit the shape of the filter, and the inlet is a funnel shape with the inner diameter gradually decreasing from the filter end to the air intake hose end.

[0010] Preferably, the intake tuning pipe has a constant diameter, and the intake hose has a constant diameter at least at the end connected to the intake tuning pipe.

[0011] The second aspect of this utility model provides an engine including a carburetor and a carburetor fuel-saving device as described in the first aspect of this utility model.

[0012] The beneficial effects of this utility model are as follows:

[0013] (1) This utility model proposes a carburetor fuel-saving device. The length of the intake pipe in the carburetor fuel-saving device is designed according to the engine speed based on the daily cruising speed range. This ensures that when the engine is running, the atomized gasoline injected back into the carburetor is suspended in the cavity of the intake pipe and will not dissipate into the air. The atomized gasoline in the carburetor is recovered by the positive pressure wave generated by the intake inertia effect, which effectively reduces fuel consumption and extends the engine range.

[0014] (2) The filters and intake tuning pipes at both ends of the intake hose are sealed and connected by the intake hose. The soft hose and the rigid filters and intake tuning pipes at both ends can form a good sealing connection effect.

[0015] (3) At the same time, a filter is installed at the inlet of the air intake hose of the carburetor fuel-saving device, which can effectively prevent large impurities from being mixed in during the atomized gasoline recovery process, thus preventing damage to the engine. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the carburetor fuel-saving device in a preferred embodiment of the present invention;

[0017] Figure 2 This is a cross-sectional view of a carburetor fuel-saving device in a preferred embodiment of the present invention;

[0018] Figure 3 This is an exploded view of a carburetor fuel-saving device in a preferred embodiment of the present invention. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0020] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0021] See Figure 1-3As shown, in a preferred embodiment of this utility model, a carburetor fuel-saving device is proposed for use in an aircraft piston two-stroke engine. It includes an intake pipe, with its first end sealed to the air intake of a carburetor 7, and its second end, away from the first end, fixedly connected to a filter 1. The intake pipe includes an intake hose 3 and a filter 1 and an intake tuning pipe 5, respectively sealed to both ends of the intake hose. The soft hose and the rigid filters 1 and intake tuning pipe 5 at both ends can form a good sealing connection. One end of the intake tuning pipe 5 is provided with a flange connected to the carburetor 7, tightly connecting the intake tuning pipe 5 and the carburetor 7 through the flange. In other embodiments, other tight connection methods can also be used.

[0022] Because the intake process is intermittent and periodic, adding an intake pipe outside the carburetor 7 will generate a pressure wave of a certain amplitude within the intake pipe. This pressure wave propagates and reflects repeatedly within the intake system at the speed of sound. If a specific length of the intake pipe is set to resonate with the entire intake system, then at a specific engine speed, a large-amplitude pressure wave will be generated within the intake pipe before the intake valve closes, thereby suppressing the outward ejection of atomized gasoline. Based on the principle of intake inertia effect, in this embodiment, the length L of the intake pipe satisfies the following formula: L = 30a / 4πn, where a is the speed of sound and n is the engine speed at which the carburetor operates. The length of the intake pipe is calculated based on the commonly used engine speed range.

[0023] A sealing element 6 is also provided between the intake tuning pipe 5 and the carburetor 7 to seal the gap between them and prevent atomized gasoline from escaping from the gap. In this embodiment, a sealing gasket is sandwiched between the intake tuning pipe 5 and the carburetor 7 and is secured by a flange to seal the gap between the carburetor 7 and the intake tuning pipe 5. In other embodiments, other sealing methods can be selected, such as sealing rings and sealing sleeves fitted around the outer circumference of the flange, but these would increase the difficulty of assembly compared to sealing gaskets.

[0024] An intake hose 3 is fitted onto the end of the intake tuning pipe 5 furthest from the carburetor 7. The intake tuning pipe 5 and the intake hose 3 are fixedly connected by a fastener 4. In this embodiment, a clamp is chosen as the fastener 4 to prevent the intake tuning pipe 5 from separating from the intake hose 3 due to air pressure during use. In other embodiments, the intake hose 3 and the intake tuning pipe 5 can be connected without a sleeve; they can be directly fastened together with a snap-fit. However, the sealing between the two will be poor. In this embodiment, the intake tuning pipe 5 has a uniform diameter, and the intake hose 3 has a uniform diameter at least at the end connected to the intake tuning pipe 5 to ensure a uniform parallel flow of air entering the pipe. The end of the intake hose 3 furthest from the intake tuning pipe 5 is the inlet, which is fixedly connected to the filter 1. In this embodiment, a snap-fit ​​is used as the connector 2 to fix the inlet to the filter 1. In other embodiments, the inlet can be directly snapped onto the filter 1. However, during use, airflow issues may cause the filter 1 to detach from the air inlet hose 3. Alternatively, it can be fixedly connected via a flange, but when using a flange for fixing, it is not easy to disassemble the filter 1.

[0025] In this embodiment, the inlet is a funnel shape with an inner diameter that gradually decreases from one end of the filter 1 to the other end of the intake hose 3. This facilitates air intake and utilizes the positive pressure wave generated by the intake inertia effect to recover the atomized gasoline suspended in the intake tuning pipe 5, reducing fuel consumption. In other embodiments, the inlet can also be set to a constant cross-section, but its airflow efficiency will be reduced. The filter 1 is a hemispherical air filter cover, which effectively increases the amount of air entering the filter and ensures that the airflow is not restricted even when some filter holes are blocked. Of course, the filter 1 can also be set as a flat filter screen, but its airflow efficiency will decrease.

[0026] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A carburetor fuel-saving device, characterized in that, It includes an intake pipe, which comprises an intake hose and a filter and an intake tuning pipe respectively sealed and connected to both ends of the intake hose. The intake tuning pipe is sealed and connected to the air intake of the carburetor. The length L of the intake pipe satisfies the following formula: L=30a / 4πn, where a is the speed of sound and n is the engine speed at which the carburetor operates. The intake pipe generates a positive pressure wave that suppresses the atomized gasoline from being sprayed outward through aerodynamic effects.

2. The carburetor fuel-saving device according to claim 1, characterized in that, The filter is a hemispherical air filter cover.

3. The carburetor fuel-saving device according to claim 1, characterized in that, A sealing element is provided between the intake tuning pipe and the air intake of the carburetor.

4. The carburetor fuel-saving device according to claim 1, characterized in that, One end of the intake hose is fitted onto the end of the intake tuning pipe furthest from the carburetor, and the intake hose and the intake tuning pipe are fastened together by a fastener.

5. The carburetor fuel-saving device according to claim 1, characterized in that, The air intake hose is connected to the filter via a connector.

6. The carburetor fuel-saving device according to claim 1, characterized in that, The inlet of the air intake hose near the filter is configured to fit the shape of the filter, and the inlet is a funnel shape with an inner diameter that gradually decreases from one end of the filter to one end of the air intake hose.

7. The carburetor fuel-saving device according to claim 1, characterized in that, The intake tuning pipe has a constant diameter, and the intake hose has a constant diameter at least at the end that connects to the intake tuning pipe.

8. An engine comprising a carburetor, characterized in that, It also includes the carburetor fuel-saving device as described in any one of claims 1-7.

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