A gas mixer

Abstract

The utility model discloses a kind of gas mixers, this mixer includes main air inlet, sealing gasket, mounting bolt and vice air inlet elbow. The mixer main body of the vice air inlet elbow is inserted into main air inlet, its end is closed by mixer plug, four air holes are provided on pipe wall, wherein the upper two holes are arranged close to main air inlet side wall, the lower two holes are close to bottom surface and the air outlet direction is downward. By closing pipe mouth and specific hole position layout, using main air inlet side wall high-speed airflow adsorption and bottom surface airflow guide, the rapid mixing of waste gas and intake air is realized, while effectively inhibiting gas backflow. The utility model is compact in structure, cancels traditional check valve design, reduces cost and improves space utilization, suitable for the optimization arrangement of EGR system.

Description

Technical Field

[0001] This utility model relates to the field of internal combustion engine technology, and in particular to a gas mixer. Background Technology

[0002] In existing internal combustion engine exhaust gas recirculation (EGR) systems, the EGR outlet pipe and intake pipe are typically directly connected. This design has the following drawbacks:

[0003] Poor gas mixing: Exhaust and intake air are not fully mixed, affecting combustion efficiency;

[0004] Gas backflow risk: When the engine is under partial load, due to the excessively high intake pressure of the turbocharger, gas is prone to backflow along the EGR line, increasing exhaust resistance and reducing the effectiveness of nitrogen oxide control.

[0005] To suppress backflow, some existing technical solutions involve installing a one-way diaphragm valve in the EGR pipeline; however, this method has the following technical problems:

[0006] 1. Adding extra parts increases costs;

[0007] 2. The valve body is large in size, occupies a lot of space, and affects the compactness of the pipeline layout;

[0008] 3. It disrupts the integrity of the pipeline structure and increases assembly complexity. Utility Model Content

[0009] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0010] Therefore, to solve the above-mentioned technical problems, this utility model provides the following technical solution: a gas mixer, comprising:

[0011] The main air intake has mounting holes on its side for installing the auxiliary air intake bend.

[0012] A sealing gasket is placed between the main intake manifold and the auxiliary intake bend to prevent gas leakage;

[0013] Mounting bolts are used to secure the secondary intake bend and enhance the seal.

[0014] The secondary intake elbow includes a mounting flange welded to the end, a mixer body connected to the external pipeline, and a mixer plug that seals the pipe opening;

[0015] The mixer body has four vents, two of which are located on the upper part of the mixer body near the main air intake, and the other two are located near the bottom of the main air intake, with the air outlet angle pointing downwards.

[0016] In a preferred embodiment of the gas mixer described in this utility model, the vent includes vent a and vent b arranged on the upper part of the mixer body, and the axes of vent a and vent b are at the same distance from the axis of the main air intake.

[0017] In a preferred embodiment of the gas mixer described in this utility model, the outlet directions of the vents a and b form a 45° angle with the airflow direction of the main intake sidewall to enhance the gas mixing effect.

[0018] In a preferred embodiment of the gas mixer described in this utility model, the vent further includes vent c and vent d arranged near the bottom surface of the main air intake, and the vent c and vent d are equidistant from the axis of the main air intake.

[0019] In a preferred embodiment of the gas mixer described in this utility model, the diameters of the vent holes a and b are smaller than the diameters of the vent holes c and d, in order to accommodate the flow velocity differences in different areas of the main air intake.

[0020] In a preferred embodiment of the gas mixer described in this utility model, the distance between the axis of the vent hole a and the axis of the main air intake is greater than the distance between the axis of the vent hole c and the axis of the main air intake.

[0021] In a preferred embodiment of the gas mixer described in this utility model, the sealing gasket is made of high-temperature resistant graphite material to adapt to the high-temperature environment during the operation of the internal combustion engine.

[0022] The beneficial effects of this utility model are:

[0023] 1. This utility model uses a mixer plug to seal the pipe opening, forcing gas to be ejected only from the four vents. Combined with the adsorption effect of the high-speed low-pressure zone on the side wall of the main intake and the airflow guidance on the bottom surface, a physical barrier is formed, which significantly reduces the risk of gas backflow.

[0024] 2. The upper vent of this utility model uses the high-speed airflow on the side wall of the main intake duct to induce EGR gas; the lower vent uses the inertial diffusion of the airflow on the bottom surface to achieve dual-region synergistic mixing; the smaller diameter upper vent is adapted to the high-speed zone, and the larger diameter lower vent is matched with the low-speed zone, improving the mixing uniformity; the 45° outlet angle of vent a and vent b generates shear airflow, enhancing the turbulent mixing intensity.

[0025] 3. This utility model eliminates additional parts such as one-way valves and achieves its function solely through an integrated orifice layout, thereby reducing manufacturing costs; the main axis design of the mixer minimizes obstruction of the main airflow and ensures smooth flow; the overall structure is compact and easy to arrange in a small engine compartment. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0028] Figure 2 This is a schematic diagram of the overall structure of the auxiliary air intake bend of this utility model.

[0029] Figure 3 This is a front view of the intersection of the main air intake and the auxiliary air intake bend of this utility model.

[0030] Figure 4 This is a side sectional view of the intersection of the main air intake and the auxiliary air intake bend of this utility model.

[0031] Figure 5 This is a schematic diagram of the airflow direction structure of the vent hole of the secondary air intake bend of this utility model.

[0032] Figure 6 For the present utility model Figure 5 A schematic diagram of a local structure.

[0033] In the diagram: 100, main air intake;

[0034] 200. Sealing gasket;

[0035] 300. Install bolts;

[0036] 400. Secondary intake bend; 401. Mounting flange; 402. Mixer body; 4021. Vent a; 4022. Vent b; 4023. Vent c; 4024. Vent d; 403. Mixer plug. Detailed Implementation

[0037] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0040] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0041] Reference Figures 1-6 As an embodiment of this utility model, a gas mixer is provided, comprising:

[0042] This gas mixer mainly includes a main air intake duct 100, a sealing gasket 200, mounting bolts 300, and a secondary air intake bend 400, as detailed below:

[0043] The main air intake 100 has mounting holes for a secondary air intake bend on its side. The horizontal distance between the mounting holes and the axis of the main air intake 400 is (e.g., ...). Figure 3 (As shown) Ensure a balance between structural compactness and airflow resistance, preventing situations where excessive size leads to a bulky structure, or excessive size increases intake resistance.

[0044] The sealing gasket 200 is located around the mounting hole on the main intake manifold 100 to prevent gas leakage. The sealing gasket 200 can be made of a suitable high-temperature resistant material according to the actual working conditions (such as gas corrosivity and temperature). For example, the sealing gasket 200 can be made of high-temperature resistant graphite material to adapt to the high-temperature environment of the internal combustion engine.

[0045] Mounting bolts 300, through the mounting flange 401 and sealing gasket 200 of the secondary intake bend 400, fix the two to the main intake duct 100, while enhancing the sealing performance.

[0046] The secondary intake bend 400 mainly consists of a mounting flange 401, a mixer body 402, and a mixer plug 403. The mixer body 402 is a long steel pipe, with one end connected to an external EGR pipeline, and the other end welded to the mounting flange 401 and completely sealed through the mixer plug 403 (anti-backflow design). The section of the mixer body 402 extending into the main intake duct 100 has four vent holes (vent hole a4021, vent hole b4022, vent hole c4023, vent hole d4024). The vent hole layout and airflow control are as follows: Figure 3-6 As shown;

[0047] Specifically, the upper vents a4021 and b4022 are arranged close to the side wall of the main air intake duct 100, and their axes are equidistant from the axis of the main air intake duct 100 (e.g., Figure 3 Mid-distance E=G);

[0048] The lower vents c4023 and d4024 are arranged near the bottom surface of the main air intake duct 100, and their axes are equidistant from the axis of the main air intake duct 100. Figure 3 The distance between the vents is F = K, and the following conditions are met: the axial distance between vents a4021 and b4022 is greater than the axial distance between vents c4023 and d4024 (i.e., E = G > F = K).

[0049] The diameters of vents a4021 and b4022 are smaller than those of vents c4023 and d4024 to accommodate different flow velocity regions of the main air intake duct 100 (high-speed region on the side wall and low-speed region on the bottom).

[0050] The air outlet directions of vents a4021 and b4022 form a 45° angle with the side wall of the main air intake duct 100 (e.g., Figure 5 As shown in the figure, this causes the airflow to form a shearing effect with the wall of the main intake duct 100.

[0051] The air outlets of vents C4023 and D4024 face downwards, forming a downward angle with the axis of the main air intake duct 100 (e.g., Figure 4 (As shown), to avoid direct confrontation with the main airflow.

[0052] The mixer body 402 is biased towards the outside of the bend in the main intake duct 100 (e.g.) Figure 4 (as shown), to minimize airflow obstruction.

[0053] In practical use, such as Figures 5-6 As shown:

[0054] Main intake 100 airflow (e.g.) Figure 5 When the flow (in the direction of e1 in / 6) passes through the bend, the outer flow velocity increases and the pressure decreases;

[0055] EGR gas is ejected through the vent:

[0056] The airflow ejected from vent a4021 and vent b4022 (such as...) Figure 5 The gas in directions a1 and b1 of / 6 is adsorbed by the high-speed low-pressure zone on the side wall of the main intake duct 100 to prevent backflow of gas.

[0057] The airflow ejected from vents C4023 and D4024 (such as...) Figure 5 The c1 and d1 directions in / 6 diffuse along the bottom surface of the main intake 100 and mix with the airflow at the bend of the main intake 100.

[0058] The upper holes (vent holes a4021 and b4022) utilize high-speed airflow from the sidewalls for injection, while the lower holes (vent holes c4023 and d4024) utilize the inertial mixing of airflow from the bottom surface to achieve efficient mixing and suppress backflow.

[0059] The present invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A gas mixer, characterized in that: include: The main air intake (100) has mounting holes on its side for installing the auxiliary air intake bend (400); A sealing gasket (200) is provided between the main air intake (100) and the auxiliary air intake bend (400) to prevent gas leakage; Mounting bolts (300) are used to secure the secondary intake bend (400) and enhance the seal; The secondary intake bend (400) includes a mounting flange (401) welded to the end, a mixer body (402) connected to an external pipeline, and a mixer plug (403) that seals the pipe opening; The mixer body (402) has four vent holes, two of which are located near the main air intake (100) on the upper part of the mixer body (402), and the other two are located near the bottom surface of the main air intake (100) with the air outlet angle facing downwards.

2. A gas mixer as described in claim 1, characterized in that: The vents include vent a (4021) and vent b (4022) arranged on the upper part of the mixer body (402), and the axis of vent a (4021) and vent b (4022) is at the same distance from the axis of the main air intake (100).

3. A gas mixer as described in claim 2, characterized in that: The air outlet directions of the vents a (4021) and b (4022) are at a 45° angle to the airflow direction of the side wall of the main air intake (100) to enhance the gas mixing effect.

4. A gas mixer as described in claim 3, characterized in that: The ventilation holes also include ventilation holes c (4023) and d (4024) arranged near the bottom surface of the main air intake (100), and the ventilation holes c (4023) and d (4024) are at the same distance from the axis of the main air intake (100).

5. A gas mixer as described in claim 4, characterized in that: The diameters of the vents a (4021) and b (4022) are smaller than those of the vents c (4023) and d (4024) to accommodate the flow velocity differences in different areas of the main air intake (100).

6. A gas mixer as described in claim 5, characterized in that: The distance between the axis of the vent a (4021) and vent b (4022) and the axis of the main air intake (100) is greater than the distance between the axis of the vent c (4023) and vent d (4024) and the axis of the main air intake (100).

Images