A spin-type gas fuel injector

Abstract

The present invention discloses a spin-type gas fuel injector, which comprises a valve body; an air inlet and an air outlet are respectively arranged on the side wall and the bottom of the valve body; a driving mechanism for driving a valve core to open or close the air outlet is arranged at the top of the valve body; a rotating air chamber is hermetically and rotatably connected to the bottom of the valve body and the air outlet; and injection holes which are arranged at an angle with the radial direction of the rotating air chamber are communicated with the side wall of the rotating air chamber. In the present invention, the rotating air chamber is hermetically and rotatably connected to the bottom of the valve body, and the injection holes communicated with the inner cavity thereof are arranged on the side wall of the rotating air chamber and are arranged at an angle with the radial direction of the rotating air chamber. When high-pressure gas is injected, the reaction force of the high-pressure gas on the rotating air chamber drives the rotating air chamber to perform rotary injection, bringing eddy currents to promote the high-pressure gas to perform high-speed swirling motion from the valve chamber to the valve port, thereby enhancing the mixing effect and solving the problem of insufficient mixing of fuel and air caused by the direct injection gas supply mode in the high-pressure cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of gas injection valves, and more particularly to a spin-type gas fuel injector. Background Art

[0002] With the rapid development of social technology, automobiles have become essential means of transportation for every household. While people enjoy the convenience brought by automobiles, they also need to face the increasingly serious problems of air pollution and energy crisis. Therefore, we have to explore a new path in the research and design of internal combustion engines. Since new energy internal combustion engines can well avoid the problems of air pollution and resource shortage, domestic and foreign research experts have been committed to researching and developing new energy internal combustion engines. New energy mainly includes gaseous fuels, dimethyl ether gasoline, alcohol-based fuels, and biodiesel, etc. Among them, natural gas stands out due to its abundant reserves and clean combustion.

[0003] In the practical application of new energy internal combustion engines, the in-cylinder mixing uniformity of natural gas and air has an important impact on the power performance, economy, and emissions of the engine. According to the investigation results of Pohang University of Science and Technology in South Korea and the Institute of Mechanical Engineering and New Materials, the traditional intake method and injection valve directly inject into the intake port after the intake valve is closed, causing a large amount of rich combustible mixture to accumulate around the intake valve. When the intake valve starts in the next cycle, a large amount of combustible mixture first flows into the cylinder, and then air enters the cylinder, resulting in poor mixing effect. The uneven mixing of natural gas and air will lead to the generation of harmful gases, which is not conducive to reducing pollutant emissions. Summary of the Invention

[0004] The purpose of the present invention is to address the problem that the existing mechanical injection valve will cause uneven gas mixing, resulting in low power performance and economy of the engine, and to propose a spin-type gas fuel injector.

[0005] The technical solution of the present invention is: a spin-type gas fuel injector, including a valve body; an air inlet and an air outlet are respectively provided on the side wall and the bottom of the valve body; a driving mechanism for driving the valve core to open or close the air outlet is provided at the top of the valve body; a rotating air chamber is hermetically and rotatably connected to the bottom of the valve body and the air outlet; injection holes are communicated with the side wall of the rotating air chamber and are arranged at an angle with the radial direction of the rotating air chamber.

[0006] The rotating air chamber includes a connecting cover, a limiting ring, and a chamber body; the connecting cover is coaxially and rotatably connected to the outside of the air outlet, and a sealing mechanism is provided between it and the bottom of the valve body; the limiting ring is coaxially connected to the bottom of the air outlet for axially limiting the connecting cover; the chamber body is coaxially fixed to the bottom of the connecting cover.

[0007] The sealing mechanism includes a sealing ring; a plurality of annular grooves are coaxially provided at the top of the connecting cover, and a sealing ring is slidably connected in each annular groove; a spring piece is provided between the sealing ring and the bottom of the annular groove; the spring piece presses the sealing ring against the bottom of the valve body.

[0008] A plurality of upper connecting ears are evenly distributed along the circumferential direction at the bottom edge of the connecting cover; lower connecting ears corresponding to the upper connecting ears are provided at the top edge of the bin body; the upper connecting ears and the lower connecting ears are fixedly connected by a locking member.

[0009] The cross-section of the spring piece is V-shaped.

[0010] The spring piece is made of a material with high heat resistance and strong wear resistance.

[0011] The driving mechanism is a linear motor.

[0012] There are two injection holes, and the two injection holes are centrosymmetrically arranged with respect to the axis of the rotating air chamber.

[0013] The injection holes are arranged obliquely downward.

[0014] Adopting the above technical solution, the present invention has the following beneficial effects: (1) In the present invention, the rotating air chamber is rotatably and sealingly connected to the bottom of the valve body, injection holes communicating with its inner cavity are provided on the side wall of the rotating air chamber, and the injection holes are arranged at an angle with the radial direction of the rotating air chamber. When high-pressure gas is injected, the reaction force of the high-pressure gas on the rotating air chamber drives the rotating air chamber to rotate and inject, bringing eddy currents to cause the high-pressure gas to perform high-speed swirling motion from the valve chamber to the valve port, thereby enhancing the mixing effect, solving problems such as insufficient mixing of fuel and air caused by the direct injection gas supply method in the high-pressure cylinder, not only being able to alleviate problems such as sharp combustion caused by too long stagnant combustion time, rapid increase in cylinder pressure and increase in mechanical load, but also enabling the fuel to burn more fully, thereby improving the combustion efficiency and enhancing the economy and power performance of the engine.

[0015] (2) In the present invention, a sealing mechanism is provided between the rotating air chamber and the bottom of the valve body, which can ensure the sealing performance between the rotating air chamber and the valve body and prevent fuel leakage.

[0016] (3) The sealing mechanism of the present invention adopts a plurality of slidably arranged sealing rings, and a spring piece is provided between the sealing ring and the bottom of the annular groove, which can ensure that the sealing ring is always pressed against the bottom of the valve body, further ensuring the sealing performance between the valve body and the rotating air chamber.

[0017] (4) The cross-section of the spring piece of the present invention is V-shaped, which is not only convenient for installation, but also ensures its own elasticity and service life.

[0018] (5) The spring piece of the present invention is made of a material with good heat resistance and wear resistance, ensuring its service life.

[0019] (6) The present invention provides an upper connecting ear and a lower connecting ear to facilitate the connection between the connecting cover and the bin body.

[0020] (7) The driving mechanism of the present invention adopts a linear motor, which not only has a small volume and is easy to install, but also has mature technology and high driving stability.

[0021] (8) There are two injection holes provided in the present invention that are centrally symmetric about the axis of the rotating air bin, which can enhance the driving force on the rotating air bin, thereby increasing the rotational speed of the rotating air bin and further improving the mixing effect of fuel gas and air.

[0022] (9) The injection holes of the present invention are arranged to incline downward, and the reaction force of the injection air flow on the housing can be decomposed into a circumferential force that causes the housing to rotate and a thrust force in the vertical direction, so that the spring piece fits more closely to the bottom of the valve body, further ensuring the sealing performance between the rotating air bin and the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the content of the present invention easier to be clearly understood, the following further describes the present invention in detail according to specific embodiments in conjunction with the drawings.

[0024] Figure 1 is a schematic structural diagram of the present invention.

[0025] Figure 2 is a schematic diagram of the internal structure of the present invention.

[0026] Figure 3 is Figure 2 an enlarged view of part A in

[0027] The reference numerals in the drawings are:

[0028] valve body 1, air inlet 1-1, air outlet 1-2, valve core 1-3, driving mechanism 2, rotating air bin 3, injection hole 3-1, connecting cover 3-2, limiting ring 3-3, bin body 3-4, ball bearing 3-5, annular groove 3-6, upper connecting ear 3-7, lower connecting ear 3-8, sealing mechanism 4, sealing ring 4-1, elastic sheet 4-2. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] (Example 1)

[0030] See Figures 1 to 3, A spin-type gas fuel injector according to this embodiment includes a valve body 1; an air inlet 1-1 and an air outlet 1-2 are respectively provided on the side wall and the bottom of the valve body 1; a driving mechanism 2 for driving the valve core 1-3 to open or close the air outlet 1-2 is provided on the top of the valve body 1; a rotating air chamber 3 is hermetically and rotationally connected to the bottom of the valve body 1 and the air outlet 1-2; a spray hole 3-1 which is arranged at an angle with the radial direction of the rotating air chamber 3 is communicated on the side wall of the rotating air chamber 3, and the preferred angle is 30°-90°.

[0031] Further, for the convenience of installing the rotating air chamber 3, the rotating air chamber 3 includes a connecting cover 3-2, a limiting ring 3-3 and a chamber body 3-4; the connecting cover 3-2 is coaxially and rotationally connected to the outside of the air outlet 1-2 through a ball bearing 3-5, and a sealing mechanism 4 is provided between it and the bottom of the valve body 1 to ensure the sealing performance between the rotating air chamber 3 and the valve body 1 and avoid gas leakage; the limiting ring 3-3 is coaxially connected to the bottom of the air outlet 1-2 for axially limiting the connecting cover 3-2; the chamber body 3-4 is coaxially fixed to the bottom of the connecting cover 3-2.

[0032] Further, the sealing mechanism 4 includes a sealing ring 4-1; a plurality of annular grooves 3-6 are coaxially provided on the top of the connecting cover 3-2, and a sealing ring 4-1 is slidably connected in each annular groove 3-6; a spring piece 4-2 is provided between the sealing ring 4-1 and the bottom of the annular groove 3-6; the spring piece 4-2 presses the sealing ring 4-1 against the bottom of the valve body 1, so that the sealing ring 4-1 can always press against the bottom of the valve body 1, further ensuring the sealing performance between the rotating air chamber 3 and the valve body 1.

[0033] Further, for the convenience of connecting the chamber body 3-4 and the connecting cover 3-2, a plurality of upper connecting ears 3-7 are evenly distributed along the circumferential direction at the bottom edge of the connecting cover 3-2; a lower connecting ear 3-8 corresponding to the upper connecting ear 3-7 is provided at the top edge of the chamber body 3-4; the upper connecting ear 3-7 and the lower connecting ear 3-8 are fixedly connected by a locking member, and the locking member preferably uses a bolt.

[0034] Further, the cross section of the spring piece 4-2 is V-shaped, which is not only convenient for installation, but also ensures its elasticity.

[0035] Further, the spring piece 4-2 is made of a material with high temperature resistance and strong wear resistance, preferably tungsten steel, to improve its service life.

[0036] Further, the driving mechanism 2 is a linear motor, which not only has a small volume, is convenient for installation, but also has mature technology and good driving effect.

[0037] Furthermore, there are two injection holes 3-1, and the two injection holes 3-1 are symmetrically arranged about the axis of the rotating air chamber 3, which can enhance the driving force on the rotating air chamber 3, thereby increasing the rotational speed of the rotating air chamber 3 and further improving the mixing effect of the fuel gas and air.

[0038] Furthermore, the injection hole 3-1 is arranged to incline downward. Preferably, the downward inclination angle is 30°. The reaction force of the injection air flow on the housing can be decomposed into a circumferential force that rotates the housing and a thrust force in the vertical direction, so that the spring piece fits more closely to the bottom of the valve body 1, further ensuring the sealing performance between the rotating air chamber 3 and the valve body 1.

[0039] In the spin-type gas fuel injector of this embodiment, a rotating air chamber 3 is rotatably and sealingly connected to the bottom of the valve body 1, and injection holes 3-1 communicating with its inner cavity are provided on the side wall of the rotating air chamber 3. The injection holes 3-1 are arranged at an angle with the radial direction of the rotating air chamber 3. When high-pressure fuel gas is injected, the reaction force of the high-pressure fuel gas on the rotating air chamber 3 drives the rotating air chamber 3 to perform rotational injection, bringing about a vortex to cause the high-pressure fuel gas to perform high-speed swirling motion from the valve chamber to the valve port, thereby enhancing the mixing effect and solving problems such as insufficient mixing of fuel and air caused by the direct injection gas supply method in the high-pressure cylinder. It can not only alleviate the problems of sharp combustion, rapid increase in cylinder pressure and increase in mechanical load caused by too long stagnant combustion time, but also make the fuel burn more fully, thereby improving the combustion efficiency and enhancing the economy and power performance of the engine.

[0040] The specific embodiments described above have further elaborated on the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A spin-type gas fuel injector, characterized in that: It includes a valve body (1); an air inlet (1-1) and an air outlet (1-2) are respectively provided on the side wall and the bottom of the valve body (1); a driving mechanism (2) for driving a valve core (1-3) to open or close the air outlet (1-2) is provided on the top of the valve body (1); a rotating air chamber (3) is hermetically and rotationally connected to the bottom of the valve body (1) and the air outlet (1-2); a spray hole (3-1) which is arranged at an angle with the radial direction of the rotating air chamber (3) is communicated on the side wall of the rotating air chamber (3); the rotating air chamber (3) includes a connecting cover (3-2), a limiting ring (3-3) and a chamber body (3-4); the connecting cover (3-2) is coaxially and rotationally connected to the outside of the air outlet (1-2), and a sealing mechanism (4) is arranged between it and the bottom of the valve body (1); the limiting ring (3-3) is coaxially connected to the bottom of the air outlet (1-2) for axially limiting the connecting cover (3-2); the chamber body (3-4) is coaxially fixed to the bottom of the connecting cover (3-2); the sealing mechanism (4) includes a sealing ring (4-1); a plurality of annular grooves (3-6) are coaxially arranged on the top of the connecting cover (3-2), and a sealing ring (4-1) is slidably connected in each annular groove (3-6); a spring piece (4-2) is arranged between the sealing ring (4-1) and the bottom of the annular groove (3-6); the spring piece (4-2) presses the sealing ring (4-1) against the bottom of the valve body (1); a plurality of upper connecting ears (3-7) are evenly distributed along the circumferential direction at the bottom edge of the connecting cover (3-2); a lower connecting ear (3-8) corresponding to the upper connecting ear (3-7) is arranged at the top edge of the chamber body (3-4); the upper connecting ear (3-7) and the lower connecting ear (3-8) are fixedly connected by a locking piece; the cross section of the spring piece (4-2) is V-shaped.

2. The spin-type gas fuel injector according to claim 1, characterized in that: The spring piece (4-2) is made of a material with high temperature resistance and strong wear resistance.

3. The spin-type gas fuel injector according to claim 1, characterized in that: The driving mechanism (2) is a linear motor.

4. The spin-type gas fuel injector according to claim 1, characterized in that: There are two spray holes (3-1), and the two spray holes (3-1) are centrally symmetrically arranged with respect to the axis of the rotating air chamber (3).

5. The spin-type gas fuel injector according to claim 1, characterized in that: The spray hole (3-1) is arranged to incline downward.

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