WO2017200331A1

WO2017200331A1 - Backflow preventing device mountable in exhaust pipe of internal combustion engine

Info

Publication number: WO2017200331A1
Application number: PCT/KR2017/005199
Authority: WO
Inventors: 김덕영
Original assignee: 김덕영
Priority date: 2016-05-19
Filing date: 2017-05-19
Publication date: 2017-11-23
Also published as: KR101778443B1

Abstract

The present invention relates to a backflow preventing device, which is mountable in an exhaust pipe of an internal combustion engine and of which there is at least one integrally attached or fixed and mounted to an exhaust pipe inner diameter surface regardless of different shapes, such as cylindrical and oval, of the exhaust pipe inner diameter in order to prevent the backflow of exhaust gas discharged to the exhaust pipe by the operation of a vehicle internal combustion engine. The present backflow preventing device comprises: a curved contact part provided in a curved shape at a position at which the curved contact part can come into contact with a terminal region of the exhaust pipe along the inner diameter surface of the circumferential direction; a heat-resistant adhesive member positioned between the curved contact part and the inner diameter surface, and adhering the curved contact part to the inner diameter surface so as to maintain a contact state for a predetermined time; an exhaust gas acceleration part having a predetermined inclined surface, which is formed at the other side of the curved contact part in an exhaust direction along the circumferential direction, such that the diameter thereof is reduced, thereby instantly accelerating the flow velocity of the exhaust gas; and a flow-increase and backflow-prevention part cut at an end region of the exhaust gas acceleration part in the exhaust direction, so as to increase the amount of exhaust gas while maintaining the accelerated flow velocity of the exhaust gas and prevent the backflow of the exhaust gas.

Description

Backflow prevention device that can be mounted in the exhaust vent

The present invention relates to a backflow prevention device that can be mounted in an exhaust port of an internal combustion engine, and more particularly, in order to prevent backflow of the exhaust gas discharged to the exhaust port due to the operation of an automobile internal combustion engine, a cylinder, an ellipse, etc. It relates to a non-return apparatus which can be mounted in an exhaust port of an internal combustion engine, at least one of which is integrally attached, fixed, and mounted on its inner diameter surface regardless of its form.

In general, a motor vehicle operates as an internal combustion engine such as an engine, that is, generates a fast turning force by the power of an engine having a four-cycle stroke, and makes it possible to drive according to the turning force.

However, four cycles of intake, expansion, explosion, and exhaust are performed in order to obtain one rotation of power. Among them, the exhaust stroke for exhausting gas corresponds to one cycle, while the remaining three cycles are performed. The phenomenon that the exhaust of gas is stuck or stopped in an exhaust port occurs.

As a result, the exhaust gas stagnated or stopped in the exhaust port for three cycles causes some stagnant exhaust gas to flow into the cylinder in the reverse direction along the inner diameter of the exhaust port when the exhaust gas inside the cylinder of the engine is discharged toward the exhaust port in one cycle of the exhaust stroke. Inflow occurs and is mixed in the intake stroke of fuel gas, which is the next stroke, to reduce the engine's explosive power and performance due to incomplete explosion, as well as noise and fuel economy due to incomplete explosion, as well as engine life There is a problem that is shortened.

In order to solve the above problems, an internal combustion engine exhaust gas backflow prevention device has been developed, and the backflow prevention device can be divided into a case mounted in the middle of the exhaust port and mounted at the end of the exhaust port.

As such, the backflow prevention device mounted in the middle of the exhaust port can be installed by a specialist such as a mechanic or a technician by cutting and installing the middle part of the exhaust port, and then welding or tightening it with bolts and airtight members. There is a problem that can not easily approach the backflow prevention effect of the exhaust gas due to the difficulty and difficulty.

In addition, the exhaust port is usually formed in the shape of a pipe, but as the exhaust port has been gradually developed in a complex design, recently, the shape and shape of the vehicle is differently formed for each type of vehicle, such as small, medium, large. In addition, depending on the design of the vehicle, the exhaust port may be embedded in the bumper of the rear of the vehicle.

As described above, since the distal end of the exhaust port forms a design shape having a specific shape or is inserted into the bumper, there are the following problems.

In the former, there is a problem in that it must be mounted after cutting the end of the exhaust port including the design shape because it must be mounted on the outer diameter surface of the exhaust port having a specific shape of the design shape. In the latter case, the exhaust gas backflow prevention device is installed in the exhaust port. If there is a problem that can be created by replacing the bumper easy to install the environment that can be mounted.

In addition, the prior art backflow prevention device is well known in the " back pressure removal backflow prevention device " described in registered patent No. 0769700, and the " exhaust gas backflow prevention device of an internal combustion engine and a boiler " described in WO2009-0108578. As shown, this backflow prevention device is not only a situation that can not solve the above-mentioned problem because it is mounted on the outer diameter surface of the exhaust port, and in particular, when the screw is fastened, it is mounted on the outer surface and exposed to anyone Since it can be decomposed into an unprotected state in theft, there is a problem of leaking, and since it is fixed to the outer diameter of the exhaust port by a fixed pipe, it is impossible to completely seal the airflow, so there is a problem that a reverse flow of exhaust gas may occur. In order to prevent the problem, a sealing member for airtightness must be provided between the fixed pipe and the outer diameter surface of the exhaust port. There is this.

In addition, since the conventional non-return device is inevitably mounted on the outer diameter surface of the exhaust port, it can be installed after cutting the exhaust port including the exterior and appearance designed at the time of launch of the vehicle, thereby avoiding consumers by damaging the unique design of the vehicle. There is a problem.

In addition, the non-return device of the prior art has a complicated structure that can be fixed to the fixed pipe, the fixed pipe wing, the second exhaust pipe, the third exhaust pipe, the pressurizing portion mutually takes a sufficient manufacturing process and time and the production cost rises high production There is a problem that can only be supplied at a cost. As a result, there is a problem that can not popularize the exhaust gas backflow prevention device for improving the internal combustion engine performance of the vehicle.

In order to solve the above problems, the present applicant has been registered by submitting the "backflow prevention device which can be mounted in the exhaust port of an internal combustion engine" (Registration No. 10-1605613) dated May 13, 2014, but must be manufactured separately for each displacement, or There is a problem that the productivity is high, and the mounted vehicle has a problem of causing physical damage to the following vehicle when detached during operation.

The present invention has been made to solve the above problems, and in order to prevent the backflow of the exhaust gas discharged to the exhaust port due to the operation of the internal combustion engine of the vehicle, the present invention relates to a geometrical shape such as a cylindrical shape, an elliptical shape, and the like that forms the inner surface of the exhaust port. It is an object of the present invention to provide a backflow prevention device that can be mounted in an exhaust port of an internal combustion engine that can be used universally regardless of the geometric shape because it is integrally adhered and mounted along at least one circumferential direction thereof without the inner diameter.

In addition, the present invention has a flexible function that can be easily bent so that at least one or more can be sequentially attached to the inner circumferential surface along the circumferential surface irrespective of the cylindrical, elliptical, etc. geometry forming the exhaust port inner diameter surface, open It has a curved surface so that it can be installed along the shape of the inner diameter surface and can be easily installed by anyone without special technology.In particular, the internal combustion engine can be installed quickly and safely regardless of the size of the inner diameter surface required for each displacement It is an object of the present invention to provide a backflow preventing device that can be mounted in an exhaust port.

In addition, the present invention has a curved surface that is open so that at least one or more on the inner diameter surface of the exhaust opening can be sequentially bonded along the circumferential surface, simplifying the manufacturing process and the mandatory popularization that anyone can easily install due to the low cost It is an object of the present invention to provide a backflow prevention device that can be mounted in an exhaust port of an internal combustion engine.

In addition, the present invention has an open opening surface that can be adhered to and fixed to the inner surface of the exhaust port in order to be adhered and fixed sequentially along the circumferential direction, as well as can be quickly and easily dismantled when necessary after installation as well as the exhaust port SUMMARY OF THE INVENTION An object of the present invention is to provide a backflow prevention device that can be mounted in an exhaust port of an internal combustion engine that enables natural restoration without damage to the engine.

The present invention relates to an exhaust gas backflow preventing device for an automobile for exhausting exhaust gas of an internal combustion engine to an exhaust port according to the above object; A curved contact portion provided in a curved shape at a position capable of contacting the end region of the exhaust port along an inner diameter surface in a circumferential direction; A heat resistant adhesive member disposed between the curved contact portion and the inner diameter surface to maintain the contact state for a predetermined time by adhering the curved contact portion to the inner diameter surface; An exhaust gas acceleration part which forms a predetermined inclined surface in the exhaust direction along the circumferential direction on the other side of the curved contact part and shrinks it accordingly to instantly accelerate the flow rate of the exhaust gas; Can be mounted on the inner diameter surface of the internal combustion engine exhaust port including a flow rate increase and a reverse flow prevention portion to increase the exhaust volume while maintaining the flow rate of the accelerated exhaust gas cut into the exhaust direction end region of the exhaust gas acceleration portion and prevent the reverse flow of the exhaust gas Achieved by a backflow prevention device.

Here, the flow rate increase and the reverse flow prevention part is cut in the exhaust direction end region of the exhaust gas acceleration part and is disposed at equal intervals along the circumferential direction, and a plurality of flow rate expansions that increase the exhaust volume while maintaining the flow rate of the accelerated exhaust gas are provided. It is preferable to include a plurality of wings to form a space, and a reverse flow prevention jaw to be located in the exhaust gas inlet region of the flow rate expansion space to block the reverse flow of exhaust gas flowing from the outside through the flow rate expansion space.

In particular, the flow rate expansion space is preferably any one of a rectangular, streamlined, triangular, or a complex form depending on the type of incision.

In addition, the curved contact portion is made of a flexible geometric opening shape that is easily bent, at least one is provided to be gradually curved contact along the circumferential inner diameter surface of the exhaust port, the inner diameter surface is cylindrical, elliptical, combinable Corresponds to any one of the specific surface shapes,

Preferably, the exhaust gas accelerator is disposed along the inner diameter surface in the circumferential direction at the end region of the exhaust port so that the inclined surface reduces the diameter of the exhaust port.

The present invention, along with at least one circumferential direction along the inner diameter surface of the inner diameter surface irrespective of a cylindrical shape, an elliptical shape, or the like forming the inner surface of the exhaust port in order to prevent the reverse flow of the exhaust gas discharged to the exhaust port due to the operation of the automotive internal combustion engine Since it is integrally bonded and fixed, it can be used universally regardless of the geometric shape, thereby maximizing the number of vehicles to be mounted.

In addition, the present invention has a flexible function that can be easily bent so that at least one or more can be sequentially bonded to the inner circumferential surface along the circumferential direction irrespective of a cylindrical shape, an elliptical shape, or the like forming the exhaust bore inner diameter surface, and open Since it has a curved surface, it can be installed along the shape of the inner diameter surface and can be easily installed by anyone without special technology.In particular, it can be installed quickly and safely regardless of the size of the inner diameter surface required for each displacement. Even if the mounted vehicle is detached while driving, there is no effect to physically damage the rear vehicle, thereby ensuring safe driving.

In addition, the present invention has a curved surface that is open so that at least one or more on the inner diameter surface of the exhaust opening can be sequentially bonded along the circumferential surface, simplifying the manufacturing process and the mandatory popularization that anyone can easily install due to the low cost Since it is installed in many cars, it has the effect of reducing fine dust and air pollution.

In addition, the present invention has an open opening surface that can be adhered to and fixed to the inner surface of the exhaust port in order to be adhered and fixed sequentially along the circumferential direction, as well as can be quickly and easily dismantled when necessary after installation as well as the exhaust port Because it does not damage the natural recovery is possible.

1 is a perspective view showing a state in which a backflow prevention device that can be mounted in an exhaust port of an internal combustion engine according to the present invention is mounted in an exhaust port;

2 is an exploded perspective view showing a state before the non-return apparatus installed in the exhaust port of the internal combustion engine according to the present invention is mounted on the exhaust port;

3 is a cross-sectional view showing a state in which a non-return apparatus installed in the exhaust port of the internal combustion engine according to the present invention is inserted into the exhaust port.

Hereinafter, with reference to the accompanying drawings will be described in detail the backflow prevention device that can be mounted in the exhaust port of the internal combustion engine according to the present invention.

As shown in FIGS. 1 to 3, the backflow prevention device that can be mounted in the exhaust port of the internal combustion engine is bonded or installed to be curved in contact with the inner diameter surface of the exhaust port 1, and the curved contact portion 3 and the adhesive member 5 are provided. And an exhaust gas acceleration unit 7, an increase in flow rate and a backflow prevention unit 9.

The curved contact portion 3 is formed in the exhaust port 1 to be in contact with the inner diameter surface in contact with the inner diameter portion formed in a curved shape corresponding to the curved diameter along the inner diameter surface in the circumferential direction. In particular, it is provided in a curved shape at a position where the terminal region of the exhaust port 1 can be contacted along the inner diameter surface in the circumferential direction.

Here, the body portion (not shown) is made of a silicone synthetic resin which is a flexible material that can be easily bent even relatively weak external force, as well as being applied as a flame retardant material and non-combustible material of itself -40 ℃ ~ 300 ℃ In addition to the temperature change, the change in properties does not occur in the temperature change that occurs more or less. Or a material having substantially the same physical properties as the body portion.

And at least one of the body parts is connected to the circumferential inner diameter surface of the exhaust port in a gradual curved contact with no gaps, and in particular, any one of the cylindrical, elliptic, and any combination of specific curved shapes due to its flexible characteristics. The curved adhesive state can be maintained by the adhesive member 5 described below.

The adhesive member 5 is positioned between the curved contact portion 3 and the inner diameter surface of the exhaust port 1 and integrally bonds the curved contact portion 3 to the inner diameter surface to maintain contact and adhesion for a predetermined time. . Physical properties of the adhesive force are maintained even with a temperature change similar to that of the body portion, and has heat resistance.

The exhaust gas acceleration part 7 is formed equally along the circumferential surface of the body part on the other rear surface of the curved contact part 3, and a predetermined inclined surface is formed toward the exhaust direction, and is gradually uniformly reduced. As a result, the flow rate of the exhaust gas is momentarily accelerated. At this time, the flow rate of the exhaust gas depends on the degree of inclination of the inclined surface, it is possible to increase the completeness of the backflow prevention.

The flow rate increasing and backflow preventing portion 9 is aligned with the end region of the exhaust port 1, and the exhaust region outlet side end region of the exhaust gas acceleration portion 7 is cut off to the wing portion 13 and the reverse flow. The jaw 15 is formed to increase the exhaust volume while maintaining the accelerated flow rate of the exhaust gas, and prevent backflow of the exhaust gas.

The wings 13 are cut in the exhaust direction end region of the exhaust gas acceleration part 7 and are arranged in plural at equal intervals along the circumferential direction, thereby increasing the displacement while maintaining the flow rate of the accelerated exhaust gas. A plurality of flow rate expansion space 11 is formed. The flow rate expansion space 11 is for discharging the accelerated exhaust gas more quickly by selectively increasing the diameter as it is cut, and is formed in a triangular shape, a square shape, a streamlined semi-elliptical shape, or the like. Can be.

The backflow barrier 15 is formed in a region where the flow velocity of the exhaust gas is maximum, that is, the exhaust gas accelerated by being located in the exhaust gas inflow region of the flow expansion space 11 and the flow expansion space 11. Exhaust gas flowing from the outside causes vortices to block the reverse flow.

In the internal combustion engine exhaust port according to the present invention as described above, the non-return apparatus is attached to the curved contact portion 3 along the circumferential inner diameter surface of the exhaust port 1 as shown in FIG. 2. Attached in sequence with the adhesive member 5 is fixed as shown in FIG. Such attachment can be easily and quickly performed by anyone.

When exhaust gas is generated from an internal combustion engine such as an automobile, the exhaust gas is discharged to the exhaust port 1 through a silencer or the like. 1 and 3, the exhaust gas reaches the exhaust gas acceleration portion 7 of the body portion attached to the inner surface of the exhaust port 1 and is discharged toward the exhaust direction, and the flow rate of the exhaust gas is It is accelerated by the reduced exhaust gas accelerator 7 and continues to increase the flow rate, leading to a flow rate expansion space 11 of the flow increase and reverse flow prevention part 9. Here, the flow rate expansion space 11 is formed by the wing portion 13 formed at equal intervals in the circumferential direction.

As described above, the increased exhaust gas passes through the flow rate expansion space 11 of the flow increase and reverse flow prevention part 9 to maintain the increased flow rate, thereby forming an increased flow path along the flow rate expansion space 11. In addition, a small amount of backflow exhaust gas flowing along the expansion passage forms a vortex in the backflow prevention jaw 15, and thus prevents a backflow phenomenon while maintaining the flow velocity of the increased exhaust gas along the expansion passage of the flow expansion space 11. The accelerated exhaust gas is discharged quickly and efficiently.

Claims

An exhaust gas backflow prevention apparatus for an automobile for exhausting exhaust gas of an internal combustion engine to an exhaust port;

A curved contact portion provided in a curved shape at a position capable of contacting the end region of the exhaust port along an inner diameter surface in a circumferential direction;

A heat resistant adhesive member disposed between the curved contact portion and the inner diameter surface to maintain the contact state for a predetermined time by adhering the curved contact portion to the inner diameter surface;

An exhaust gas acceleration part which forms a predetermined inclined surface in the exhaust direction along the circumferential direction on the other side of the curved contact part and shrinks it accordingly to instantly accelerate the flow rate of the exhaust gas;

The internal diameter of the exhaust port of the internal combustion engine characterized by including a flow rate increase and a reverse flow prevention portion to increase the exhaust amount while maintaining the flow rate of the accelerated exhaust gas cut in the exhaust direction end region of the exhaust gas acceleration portion to prevent the reverse flow of the exhaust gas Backflow prevention device can be mounted on the surface.
The method of claim 1;

The flow rate increasing and backflow prevention unit,

A plurality of vanes which are cut in the exhaust direction end region of the exhaust gas acceleration part and are arranged at equal intervals along the circumferential direction, and form a plurality of flow rate expansion spaces for increasing the exhaust volume while maintaining the flow rate of the accelerated exhaust gas; ;

And a backflow prevention jaw disposed in the exhaust gas inflow region of the flow expansion space to block a backflow of the exhaust gas introduced from the outside through the flow expansion space.
The method of claim 2;

The flow rate expansion space is a reverse flow prevention device that can be mounted in the exhaust port of the internal combustion engine, characterized in that any one of a rectangular, streamlined, triangular or formed in a complex form depending on the type of incision.
The method of claim 1;

The curved contact portion is formed in a flexible shape that is easily bent, at least one is provided to be gradually curved contact along the circumferential inner diameter surface of the exhaust port, the inner diameter surface is cylindrical, elliptical, a specific curved form that can be combined Any one of

And the exhaust gas acceleration part is disposed along the inner diameter surface in the circumferential direction at the end region of the exhaust port so that the inclined surface reduces the diameter of the exhaust port.