Internal combustion engine exhaust gas emission promotion and backflow suppression device

Abstract

The present invention relates to an internal combustion engine exhaust gas emission promotion and backflow suppression device, comprising a cylindrical pipe and a blade fixed inside the cylinder, wherein two or more blades are attached inside the cylindrical pipe, wherein one side of the blade is joined to the outer diameter of the cylindrical pipe at the inlet of the cylindrical pipe, and the blades are arranged with a certain gap between them, wherein one side of the blade is joined along the longitudinal direction of the cylindrical pipe, and the side of the blade not joined along the longitudinal direction of the cylindrical pipe is applied with a certain slope as it approaches the cylindrical outlet, wherein each blade is configured to generate an air curtain phenomenon on adjacent blades, wherein the part of the blade not joined to the cylindrical pipe is bent in a curved shape from the inlet to the outlet, and wherein the wind speed is configured to increase as it moves from the inlet toward the center of the outlet. At the exhaust gas outlet, only one side of the wing is joined to the cylinder so that when backflow of exhaust gas from the engine occurs, the exhaust gas is guided to flow under the wing, and at the exhaust gas inlet, the wing is joined to the cylinder to prevent backflow, and the exhaust gas emitted from the gap between the wings can push out the incoming exhaust gas. An air curtain formed by exhaust gas is created between the wings to prevent the discharged exhaust gas from flowing back, and The exhaust gas discharged through the center of the exhaust gas outlet is characterized by being discharged in a swirling form and discharged at a speed faster than the wind speed inside the exhaust pipe to promote the discharge of exhaust gas.

Description

Technology Field

[0001] The present invention is intended to promote the discharge of internal combustion engine exhaust gases and suppress backflow. More specifically, the invention involves attaching an internal combustion engine exhaust gas discharge promotion and backflow suppression device to the end of the exhaust pipe. Inside the device, blades are attached to a cylindrical pipe, so that some exhaust gases pass through the blades that generate vortices, rotate in the central section, and are discharged at high speed, while some exhaust gases are discharged in a straight line through a space without blades, thereby suppressing the inflow of external air into the exhaust pipe. Furthermore, exhaust gases escaping from the blades inside the device are made to collide with the next blade surface due to centrifugal force, generating an air curtain and creating a vortex. This reduces the amount of exhaust gas drawn into the combustion chamber due to the reduced airtightness of the exhaust valve during the intake stroke, thereby increasing combustion efficiency. Additionally, the invention improves combustion efficiency by allowing a large amount of combustion gas to be discharged through the exhaust during the overlap timing when the intake and exhaust valves are open simultaneously. This is about a device that suppresses backflow. Background Technology

[0002] Internal combustion engines are driven by intake, compression, explosion, and exhaust strokes, and exhaust gases are released into the atmosphere after passing through a DPF, SCR, and muffler.

[0003] In engines equipped with variable valves, intake and exhaust are opened simultaneously to increase intake efficiency and improve combustion efficiency. However, to resolve the problem of reduced combustion efficiency caused by exhaust gas entering the combustion chamber due to back pressure in the exhaust pipe at the valve timing, and to reduce noise, a variable exhaust muffler is installed at the exhaust port to eliminate the exhaust gas backflow phenomenon where exhaust gas is drawn into the combustion chamber during the intake stroke due to reduced airtightness of the exhaust valve. However, this has not developed into a technology to suppress the exhaust gas backflow phenomenon.

[0004] For example, in the variable exhaust valve device for a muffler introduced in Korean Patent No. 10-20160057214 (Registration Date: May 10, 2016), the variable exhaust valve device for a muffler introduced in Patent No. 10-20120086340 (Registration Date: August 7, 2012), the variable exhaust valve device for a muffler with an optimized gate shape introduced in Patent No. 10-20120073797 (Registration Date: July 6, 2012), and the variable exhaust valve device for a muffler in Utility Model No. 20-20000027098 (Registration Date: September 27, 2000), the variable exhaust valve device for a muffler is in the form of a gate, so it cannot resolve the backflow phenomenon of exhaust gas, and although noise can be reduced by adjusting the exhaust pressure, the problem of exhaust gas backflow cannot be resolved.

[0005] Although the opening amount of this gate-type variable exhaust valve device for mufflers can be adjusted according to the volume of exhaust gas during low and high rotational speeds, it is difficult to expect it to effectively resolve the exhaust gas backflow phenomenon—where exhaust gas is drawn into the combustion chamber during the intake stroke due to engine overlap timing and reduced airtightness of the exhaust valve—in the entire range of low and high rotational speeds for smooth exhaust gas discharge. The problem to be solved

[0006] The problem to be solved by the present invention is that combustion gases are not smoothly discharged through the exhaust port during the offset timing of the engine's intake and exhaust valves, and due to the reduced airtightness of the exhaust valve, a backflow of exhaust gases occurs during the intake stroke, causing exhaust gases to be drawn into the combustion chamber, thereby reducing combustion efficiency. means of solving the problem

[0007] The internal combustion engine exhaust gas discharge promotion and backflow suppression device of the present invention for solving the above problem is composed of a cylindrical pipe and a blade fixed inside the cylinder, and two or more blades are attached inside the cylindrical pipe, and at the inlet of the cylindrical pipe, one side of the blade is joined to the outer diameter of the cylindrical pipe, and the blades are arranged with a certain gap between them, and one side of the blade is joined in the longitudinal direction of the cylindrical pipe, and one side of the blade that is not joined in the longitudinal direction of the cylindrical pipe is given a certain slope as it goes toward the cylindrical outlet, and each blade is configured to cause an air curtain phenomenon to occur on an adjacent blade, and the part of the blade that is not joined to the cylindrical pipe is bent in a curved shape from the inlet to the outlet, and the wind speed is configured to increase as it goes from the inlet toward the center of the outlet.

[0008] In addition, the present invention is characterized by the fact that the gap between the blades joined inside the cylindrical pipe at the exhaust gas inlet side is adjusted and arranged according to the engine displacement and the maximum rotational speed primarily used by the driver.

[0009] In addition, the present invention is characterized in that the blades on the exhaust gas outlet side are arranged by adjusting the bending angle according to the engine displacement and the maximum rotational speed primarily used by the driver.

[0010] In addition, the present invention is characterized by the blades being arranged with a constant inclination from the inlet to the outlet according to the engine displacement and the maximum rotational speed primarily used by the driver.

[0011] In addition, the exhaust gas outlet side of the present invention is characterized by having only one side of the wing joined to the cylinder so that when a backflow of exhaust gas from the engine occurs, the exhaust gas is guided to flow under the wing, and the wing at the exhaust gas inlet side is joined to the cylinder so that backflow is prevented, and the exhaust gas discharged from the gap between the wings is capable of pushing out the inflow of the discharged exhaust gas.

[0012] In addition, the present invention is characterized by allowing an air curtain to be formed between the wings due to exhaust gas, thereby preventing the discharged exhaust gas from flowing backward.

[0013] In addition, the present invention is characterized by causing the exhaust gas discharged through the center of the exhaust gas outlet to be discharged in a swirling form and to be discharged at a speed faster than the wind speed inside the exhaust pipe, thereby promoting the discharge of the exhaust gas. Effects of the invention

[0014] According to the internal combustion engine exhaust gas discharge promotion and backflow suppression device of the present invention, a blade that is entirely attached to the inlet inside a cylinder is structured such that one side of the blade is aligned with the cylinder in a straight line toward the cylinder outlet, while the other side has a constant inclination and the curvature increases toward the outlet. This structure increases the exhaust gas airflow velocity toward the outlet, thereby generating a vortex to promote exhaust gas discharge, and increases the force of the air curtain toward the outlet, thereby mitigating the phenomenon of exhaust gas backflow. Furthermore, when exhaust gas and air entering from the outlet flow under the blade, the inlet blade is attached to the inlet cylindrical surface, and the backflow of exhaust gas is suppressed by the high velocity of the exhaust gas discharged between the blades. Consequently, the reduction in combustion gas discharge efficiency caused by back pressure in the exhaust pipe during the offset timing, when the intake and exhaust valves open simultaneously at low and high engine rotation speeds, is improved, and the backflow of exhaust gas, which is drawn into the combustion chamber during the intake stroke due to reduced airtightness of the exhaust valve, is resolved. Since it can be done, combustion efficiency is improved.

[0015] As a result, the amount of fine dust captured in the DPF (diesel particulate filter) can be reduced, thereby minimizing the power loss caused by the fine dust captured in the DPF and saving fuel used to burn the fine dust captured in the DPF.

[0016] In addition, if combustion gas emissions decrease and exhaust gas backflow occurs, it leads to a decrease in power output. This causes drivers to increase fuel injection amounts and drive aggressively, which leads to engine overheating and an increase in nitrogen oxide (NOx) emissions and urea solution usage. However, by promoting exhaust gas emissions and suppressing exhaust gas backflow, nitrogen oxide (NOx) emissions can be reduced and urea solution usage can be saved.

[0017] In addition, as the driving habit of pressing the accelerator pedal deeply due to insufficient power output is changed to pressing the accelerator pedal lightly, the driver's fatigue is reduced, and effects such as reduction of fine dust, reduction of greenhouse gases, energy saving, increased power output, and reduction of driver fatigue occur. Brief explanation of the drawing

[0018] FIG. 1 is a cross-sectional view of an internal combustion engine exhaust gas emission promotion and backflow suppression device according to a preferred embodiment of the present invention. FIG. 2 is an unfolded view illustrating a cylindrical pipe and a wing that induces exhaust gas flow to generate a vortex and create an air curtain of an internal combustion engine exhaust gas discharge promotion and backflow suppression device according to a preferred embodiment of the present invention. FIG. 3 is a perspective view of an internal combustion engine exhaust gas emission promotion and backflow suppression device according to a preferred embodiment of the present invention. FIG. 4 is a perspective view of an internal combustion engine exhaust gas emission promotion and backflow suppression device according to a preferred embodiment of the present invention. Specific details for implementing the invention

[0019] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0020] FIG. 1 is a cross-sectional view of an internal combustion engine exhaust gas emission promotion and backflow suppression device according to a preferred embodiment of the present invention.

[0021] FIG. 2 is an unfolded view illustrating a cylindrical pipe and a wing that induces exhaust gas flow to generate a vortex and create an air curtain of an internal combustion engine exhaust gas discharge promotion and backflow suppression device according to a preferred embodiment of the present invention.

[0022] FIG. 3 is a perspective view of an internal combustion engine exhaust gas emission promotion and backflow suppression device according to a preferred embodiment of the present invention.

[0023] FIG. 4 is a perspective view of an internal combustion engine exhaust gas emission promotion and backflow suppression device according to a preferred embodiment of the present invention.

[0024] Referring to FIGS. 1 to 4, the present invention comprises a cylindrical pipe (20) attached to the end of an exhaust port and a wing (10) that induces the flow of exhaust gas inside the cylindrical pipe (20) to generate a vortex and create an air curtain.

[0026] In Figure 1, when joining two to multiple wings (10) inside a cylindrical pipe (20), the exhaust gas inlet portion is formed such that one side of the wing (10) is joined (B1) in the transverse direction to the inner surface of the cylindrical pipe (20), and one side of the wing (10) is joined (B2) in the longitudinal direction to the inner surface of the cylindrical pipe (20), and the side not joined in the longitudinal direction to the inner surface of the cylindrical pipe (20) is formed to have a constant slope (R) from the exhaust gas inlet to the outlet, thereby inducing the flow of exhaust gas to generate a vortex and create an air curtain.

[0027] The exhaust gas entering through the exhaust gas inlet is rapidly discharged (A2, A3) to the center of the cylindrical pipe (20) by the wing (10) that induces the exhaust gas flow, and when the discharged exhaust gas flows back (A4), the exhaust gas (A1) discharged between the wings pushes the discharged exhaust gas into the atmosphere, thereby suppressing the backflow of exhaust gas (A5).

[0028] Looking at the unfolded view of the wing (10) and the cylindrical pipe (20) in FIG. 2, which induces the cylindrical pipe and exhaust gas flow to generate a vortex and create an air curtain,

[0029] The longitudinal length (H1) of the cylindrical pipe (20) and the wing (10) is the same length, and the transverse lengths (L1, L2) of the cylindrical pipe (20) and the wing (10) are applied differently depending on the number of wings (10), but the transverse length (L1) of the wing is made longer than the length (L2) without the wing (10).

[0030] The transverse length (L3) of the cylindrical pipe (20) is made longer than the longitudinal length (H1).

[0031] When using low speed rotation in consideration of the engine speed used by the driver, the length of the lateral length (L1) of the wing (10) increases, and the length without the wing (L2) decreases.

[0032] The longitudinal length (H1) of the cylindrical pipe (20) is reduced when high-speed rotation is used, taking into account the engine rotation speed used by the driver.

[0033] Looking at the perspective view of the exhaust gas inlet of the internal combustion engine exhaust gas discharge promotion and backflow suppression device of FIG. 3, the exhaust gas (A1, A2, A3) entering through the part without the wing (10) is guided through the inner surface of the cylindrical pipe (20), and the exhaust gas (A2) guided through the wing (10) moves from the wide exhaust gas inlet to the narrow exhaust gas outlet, thereby causing the exhaust gas to be discharged at a high speed.

[0034] At this time, the exhaust gas (A3) that is separated by centrifugal force from the exhaust gas (A2) induced through the wing (10) joins with the exhaust gas (A2) induced from the adjacent wing (10), creating a strong vortex and acting as an air curtain to suppress the backflow of the discharged exhaust gas.

[0036] Looking at the perspective view of the exhaust gas outlet of the internal combustion engine exhaust gas discharge promotion and backflow suppression device of FIG. 4, the exhaust gas (A1, A2, A3) discharged through the part without the wing (10) is discharged through the inner surface of the cylindrical pipe (20), and the exhaust gas (A2) discharged through the wing (10) is discharged at a high speed into the center of the cylindrical pipe (20).

[0037] At this time, the exhaust gas (A3) that is separated by centrifugal force from the exhaust gas (A2) discharged through the wing (10) joins with the exhaust gas (A2) induced from the adjacent wing (10), creating a strong vortex and acting as an air curtain to suppress the backflow of the discharged exhaust gas.

[0038] The exhaust gas (A1) discharged through the part without wings (10) is discharged through the inner surface of the cylindrical pipe (20) and acts as a force (A5) to push back the discharged exhaust gas (A4).

[0039] Although preferred embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and it should be understood that the scope of the present invention extends to those within a scope substantially equivalent to the embodiments of the present invention. Furthermore, various modifications can be made by those skilled in the art to which the present invention pertains, without departing from the technical spirit of the present invention. Explanation of the symbols

[0041] 10: Internal blade of an internal combustion engine exhaust gas emission promotion and backflow suppression device 20: Cylindrical pipe of an internal combustion engine exhaust gas emission promotion and backflow suppression device

Claims

Claim 1 In joining two to multiple wings (10) inside a cylindrical pipe (20), the exhaust gas inlet portion is formed such that one side of the wing (10) is joined (B1) entirely in the transverse direction to the inner surface of the cylindrical pipe (20), and one side of the wing (10) is joined (B2) entirely in the longitudinal direction to the inner surface of the cylindrical pipe (20), and the side not joined in the longitudinal direction to the inner surface of the cylindrical pipe (20) has a constant slope (R) from the exhaust gas inlet to the outlet, and as it goes toward the outlet, the wing (10) is bent in a curve so that the diameter of the second circle, which includes the edge of the wing (10) as a region at the exhaust gas outlet, becomes smaller than the diameter of the first circle, which includes the edge of the wing (10) as a region at the exhaust gas inlet, thereby inducing a flow through a curved inclined surface to generate a vortex, and the exhaust gas (A3) that is induced in the wing (10) and detaches from the wing by centrifugal force is By allowing it to reach adjacent wings, an air curtain is created, and the exhaust gas entering through the exhaust gas inlet part forms a vortex (A3) by the wing (10) that guides the exhaust gas flow so that the exhaust gas is rapidly discharged (A2, A3) to the center of the cylindrical pipe (20), and when the discharged exhaust gas backflows (A4), the exhaust gas (A1) discharged between the wings pushes the discharged exhaust gas into the atmosphere, thereby suppressing the backflow of exhaust gas (A5), and among the exhaust gases (A1, A2, A3), the exhaust gas (A1) discharged through the part without the wing (10) is discharged through the inner surface of the cylindrical pipe (20), and the exhaust gas (A2) discharged through the wing (10) is guided to the curved surface of the wing and discharged to the center of the cylindrical pipe (20), and among the exhaust gas (A2) discharged through the wing (10) that is separated by centrifugal force The exhaust gas (A3) joins with the exhaust gas (A2) induced from the adjacent wing (10) to create a strong vortex and acts as an air curtain to suppress the backflow of the discharged exhaust gas, andAn internal combustion engine exhaust gas discharge promotion and backflow suppression device characterized in that the exhaust gas (A1) discharged through the wingless part (L2) is discharged through the inner surface of the cylindrical pipe (20) and plays the role (A5) of pushing out the discharged exhaust gas (A4) that flows back. Claim 2 In claim 1, when replacing the cylindrical pipe (20) with the vehicle's own exhaust pipe and joining two to multiple wings (10) inside the vehicle's own exhaust pipe, the exhaust gas inlet portion is such that one side of the wing (10) is joined (B1) entirely in the transverse direction to the inner surface of the vehicle's own exhaust pipe, and one side of the wing (10) is joined (B2) entirely in the longitudinal direction to the inner surface of the vehicle's own exhaust pipe, and the side not joined in the longitudinal direction to the inner surface of the vehicle's own exhaust pipe has a constant slope (R) from the exhaust gas inlet to the outlet, and as it goes toward the outlet, the wing (10) is bent in a curve so that the diameter of the fourth circle, which includes the edge of the wing (10) as one region at the exhaust gas outlet, becomes smaller than the diameter of the third circle, which includes the edge of the wing (10) as one region at the exhaust gas inlet, thereby inducing a flow through a curved inclined surface to generate a vortex, and the exhaust gas induced in the wing (10) is from the wing by centrifugal force The escaping exhaust gas (A3) is allowed to reach adjacent wings to create an air curtain, and the exhaust gas entering through the exhaust gas inlet part forms a vortex (A3) by the wing (10) that guides the exhaust gas flow so that the exhaust gas is rapidly discharged (A2, A3) to the center of the vehicle's inherent exhaust pipe, and when the discharged exhaust gas backflows (A4), the exhaust gas (A1) discharged between the wings pushes the discharged exhaust gas into the atmosphere, thereby suppressing the backflow of exhaust gas (A5), and among the exhaust gases (A1, A2, A3), the exhaust gas (A1) discharged through the part without the wing (10) is discharged through the inner surface of the cylindrical pipe (20), and the exhaust gas (A2) discharged through the wing (10) is guided to the curved surface of the wing and discharged to the center of the vehicle's inherent exhaust pipe, and among the exhaust gas (A2) discharged through the wing (10) by centrifugal force The escaping exhaust gas (A3) joins with the exhaust gas (A2) induced from the adjacent wing (10), causing a strong vortex, andAn internal combustion engine exhaust gas emission promotion and backflow suppression device characterized by acting as an air curtain to suppress backflow of emitted exhaust gas, and the exhaust gas (A1) emitted through the part (L2) without wings (10) being emitted through the inner surface of the vehicle's inherent exhaust pipe, thereby pushing out the emitted exhaust gas (A4) that flows backflow (A5). Claim 3 delete Claim 4 delete Claim 5 An internal combustion engine exhaust gas emission promotion and backflow suppression device characterized in that, in claim 1, the longitudinal length (H1) of the cylindrical pipe (20) and the wing (10) are different lengths, and the transverse lengths (L1, L2) of the cylindrical pipe (20) and the wing (10) are applied differently depending on the number of wings (10), but the transverse length (L1) of the wing is longer than the length (L2) without the wing (10). Claim 6 An internal combustion engine exhaust gas emission promotion and backflow suppression device, wherein the transverse lengths (L1, L2) of the cylindrical pipe (20) and the wing (10) in claim 1 are applied differently depending on the number of wings (10), but the transverse length (L1) of the wing is made longer than the length (L2) without the wing (10).

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