KR20080081680A - Vehicle muffler system - Google Patents

Abstract

A structure of a sub-muffler of a discharge device of a vehicle and a method for manufacturing the same are provided to form an internal protrusion through hole at a front end of an internal pipe, and form an outer protrusion through hole at a rear end of the internal pipe. A pipe is cut by a predetermined length and then a plurality of through holes are bored at two opposite sides of the pipe(S10). A prepared screw member is inserted into the pipe and welded onto the pipe(S20). An internal pipe is prepared in another end of the pipe(S30). An outer pipe is prepared, in which a diameter of the outer pipe corresponds to a diameter of the internal pipe(S40). An end of the outer pipe is fusion-welded onto an outer surface of the internal pipe(S50). Two opposite ends of the internal pipe of a muffler are connected to a connection pipe(S60).

Description

Manufacturing method and structure of sub muffler for vehicle exhaust system {VEHICLE MUFFLER SYSTEM}

1 is a cross-sectional view showing a conventional sub muffler.

Figure 2 is a process chart showing a method for manufacturing a sub muffler for an exhaust device of a vehicle according to the present invention.

3 is a partially cutaway perspective view showing a first embodiment of a submuffler for exhaust apparatus of a vehicle according to the present invention;

4 is a cross-sectional view showing a first embodiment of a submuffler for exhaust apparatus of a vehicle according to the present invention.

Fig. 5 is a use state diagram showing a first embodiment of a submuffler for exhaust apparatus of a vehicle according to the present invention.

6 is an installation configuration in which a sub muffler for exhaust device of a vehicle according to the present invention is installed.

7A and 7B are cross-sectional views showing a second embodiment of a submuffler for exhaust apparatus of a vehicle according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: sub muffler 10: inner tube

12,32: shaft 13: through hole

15: protruding through hole 20: screw member

21: wing 30: appearance

33: space part 40: connector

50: catalytic converter 60: main muffler

70: engine 80: exhaust manifold

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a structure for manufacturing a submuffler for an exhaust system of an automobile. More particularly, a plurality of through holes are formed on the outer circumferential surface of the submuffler adjacent to both ends of the inner tube, and a screw member is welded therein. By fixing, the exhaust gas discharged from the engine is quickly discharged to one side while spirally vortexing through the screw member, and a part of the exhaust gas flows into the through hole formed at the rear end of the inner tube and discharges into the through hole at the tip end. By discharging the exhaust gas into the atmosphere, the combustion efficiency of the fuel is increased, the output is increased, the fuel consumption is reduced, the fuel consumption is increased, and the engine heat is rapidly exhausted along with the exhaust gas to cool the engine heat. Mission oil is changed due to the engine's overheated heat. It prevents the formation of groups and raises the heat of the catalytic converter, so that the catalytic action can be performed smoothly. Also, the fine particles contaminants mixed in the exhaust gas are quickly discharged to allow lamination on the inner surface of the muffler. Without this, it relates to an automotive muffler structure which makes it possible to prevent the submuffler from oxidizing and corrosion due to the deposition of contaminants.

In general, a vehicle travels through a driving force in which a mixer mixed with air at a proper ratio is sucked into a cylinder and compressed, and then a linear motion generated through ignition and expansion is converted into a rotational motion having a torque using a connecting rod and a crank. This becomes possible.

In addition, the exhaust gas generated when the mixer is ignited is collected in one place through an exhaust manifold provided in the engine, and carbon monoxide, hydrocarbons, and nitrogen oxides are reduced and reduced by the catalyst in the course of passing through the catalytic converter. It enters the sub muffler through a pipe connected to it.

The exhaust gas introduced into the sub muffler is lowered in pressure through a plurality of expansion processes, and the exhaust noise is reduced while passing through a silencer (muffler) having a plurality of diaphragms through a pipe connected to the discharge side of the sub muffler, and the exhaust gas is external. Emitted into the air.

However, when the exhaust gas passing through the exhaust manifold and the catalytic converter passes through the sub muffler, the pressure and flow rate are lowered to act as discharge resistance, thereby reducing the engine output. The speed can be increased by speeding up the cycle of the engine, but there is a problem that fuel is wasted because the fuel is incompletely combusted with an increase in RPM.

In order to improve this problem, there is a sub-muffler (registration number 20-0246318) for an exhaust device of a vehicle, which is pre- filed and registered by the present applicant.

1 is a cross-sectional view showing a conventional sub muffler, wherein the sub muffler 1 has an inner tube 2 having a predetermined space therein and a pipe shape in which both ends are open, and an inner center of the inner tube 2. Hollow member 3, a pressure reducing member 4 provided inside the hollow member 3, and a space provided between the inner wall of the inner tube 2 and the outer wall of the hollow member 3. Inside and outside of the heat insulating material 5, the vortex forming member 6 inserted inside the pressure reducing member 4, and the heat insulating material 5 provided inside the inner tube 2 are prevented from being exposed to the outside. Is provided between the outer wall of the hollow member 3 and the inner wall of the pressure reducing member 4, with a cap 8 having a connector 7 which is blocked to maintain hermeticity and is connected to both ends of the pressure reducing member 4, respectively. It consists of the resonance part 10 which has a predetermined space.

In the sub muffler 1 configured as described above, the exhaust gas generating the driving force having the torque is collected through the exhaust manifold provided at one side of the engine, and the collected exhaust gas passes through the catalytic converter connected to the pipe, thereby reducing harmful components.

The reduced exhaust gas (combustion gas) passes through the pressure reducing member 4 connected thereto through the connector 7 of the cap 8 provided at one side of the inner tube 2.

When the exhaust gas passes through the pressure reducing member 4, when the pressure and noise are large, the exhaust gas is passed through the plurality of through holes 9 and 9a to the resonator 10 on the outside thereof. Will decrease.

In addition, when the pressure and noise of the exhaust gas is low, a part of the exhaust gas in the resonance unit 10 is introduced again through the through holes 9 and 9a so that constant pressure and noise are always maintained.

After the reduced exhaust gas passes through the pressure reducing member 4, the pressure and noise are reduced, and the exhaust gas moves along the vortex forming member 6 provided in the center of the pressure reducing member 4. As the swirl increases, the flow rate increases, increasing the exhaust efficiency.

However, the sub-muffler structure as described above can reduce the noise and increase the exhaust efficiency to some extent, but the exhaust efficiency is rather reduced due to the structure.

That is, since a plurality of through holes 9 and 9a are formed on the entire outer surface of the pressure reducing member 4, when the gas accelerator is stepped on, the exhaust gas is discharged to the outside through the main muffler, and a part of the exhaust gas is released. As the air flows into the resonance portion 10 through the through holes 9 and 9a of the pressure reducing member 4, even if the driver continues to press the accelerator pedal, the discharge pressure and the flow rate of the exhaust gas are dropped, between rpm 3000 to 3500. Since it does not go up any more, there is a problem that the output does not increase because the speed is not increased.

In addition, as described above, the exhaust pressure of the exhaust gas drops so that the combustion gas and heat inside the engine cannot be discharged quickly, thereby reducing the instantaneous acceleration, and also preventing the catalytic converter from smoothly performing the catalyst. The mission oil is changed by the overheated heat of the engine, resulting in the debris, and when the debris accumulates, the mission is broken and the life of the vehicle is shortened.

In addition, as the exhaust pressure of the exhaust gas decreases, contaminants and the like of fine particles mixed in the exhaust gas cannot be discharged quickly, so that the contaminants are laminated on the inner surface of the muffler, and eventually oxidized and corroded so that the sub muffler is damaged. There was a problem.

The present invention is designed to solve the above problems, by forming a plurality of through holes on both sides of the inner tube of the sub-muffler, by welding the screw member inside, exhaust gas discharged from the engine passes through the screw member spiral Vortex flows quickly to one side while the exhaust gas flows into the through hole formed at the rear end of the inner tube and is discharged to the through hole at the front end. Therefore, the exhaust gas is discharged to the atmosphere at a higher speed, thereby increasing the combustion efficiency of the fuel. The fuel consumption increases, fuel consumption increases, and the engine heat is exhausted along with the exhaust gas, which cools the engine heat.The mission oil, which is repeatedly circulated, changes its properties due to the engine's overheated heat. Not only prevents the heat, but also increases the heat of the catalytic converter. Is aims to provide a production method and a structure for the sub-muffler of automobile exhaust system may be made to facilitate the catalytic action.

In addition, the exhaust system of the automobile which prevents the muffler from oxidizing and corrosion due to the stacking of the contaminants by quickly discharging fine particles contaminants mixed in the exhaust gas and allowing them to be stacked on the inner surface of the muffler. It is another object to provide a method and a structure for manufacturing a sub muffler for.

The present invention for achieving the above object is, by cutting a pipe to a predetermined length and punching a plurality of through holes on both sides, the step of condensing one end (S10);

Welding and fixing the prepared screw member in a pipe (S20);

Forming an inner tube by condensing the other end of the pipe (S30);

(S40) condensing both sides of the exterior having a larger diameter than the inner tube so as to correspond to the inner tube outer diameter;

Inserting the inner tube into the outer tube, and welding the distal end portion of the outer tube to the inner tube outer surface (S50);

And connecting both ends of the inner tube of the completed sub muffler to the connector (S60);

An inner tube formed in a pipe shape and having both ends being axially formed, and a plurality of through holes formed at the front end and the rear end;

A screw member which is internally welded and fixed inside the inner tube to vortex the exhaust gas to increase the exhaust flow rate;

An appearance formed to have a diameter larger than that of the inner tube, and both ends of which are concentrically welded to the outer surface of the inner tube;

It is characterized by consisting of a connecting pipe welded and fixed to both ends of the inner tube.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a process chart showing a method for manufacturing a submuffler for an exhaust system of a vehicle according to the present invention. One end of the shaft tube (12).

At this time, the through hole 13 is formed in the entirety of the front end and the rear end of the pipe.

Then, as in the second step (S20), the screw member 20 prepared in the non-axial pipe 12 of the pipe is put into the internally welded and fixed, and then the other end of the pipe in the third step (S30) shaft ( 12) to form an inner tube (10).

In addition, the fourth step (S40) is provided with an outer tube 30 larger than the diameter of the inner tube 10 to the shaft tube 32 on both sides.

At this time, it is preferable that the shaft tube 32 on both sides of the exterior 30 have a shaft to correspond to the outer diameter of the inner tube 10.

Then, after inserting the inner tube 10 into the outer tube 30 in step 5 (S50), the end portion of the outer tube 30 is welded to the outer surface of the inner tube (10).

At this time, a certain space is formed between the exterior and the inner tube.

In step S60, both ends of the inner tube 10 of the completed submuffler 1 are welded to the connecting tube 40.

In this manner, the exhaust muffler 1 for the exhaust system of a vehicle is completed.

3 is a partially cutaway perspective view showing a first embodiment of an exhaust system sub muffler of an automobile according to the present invention, and FIG. 4 is a cross-sectional view showing a first embodiment of an exhaust system sub muffler of an automobile according to the present invention. 5 is a state diagram showing a first embodiment of the exhaust muffler subcar of the vehicle according to the present invention, Figure 6 is an installation configuration diagram in which the exhaust muffler subcar of the vehicle according to the invention is installed, a predetermined diameter It is made in the form of a pipe having both ends of the shaft tube 12, a plurality of through holes 13 are bored on both sides to form an inner tube (10).

At this time, the inner tube 10 is formed in the through hole 13 at equal intervals on the entire outer circumferential surface of the front end portion and the rear end, it is preferable that the inner tube 10 is not formed in the portion.

In addition, a screw member 20 is installed inside the inner tube 10 to vortex the exhaust gas to increase the exhaust flow rate.

The screw member 20 is formed so that the three blades 21 to form a screw shape by radiation, the width is formed to be the same as the inner diameter of the inner tube 10, one end and the other end of the inner tube 10 It is welded and fixed to the inner peripheral surface.

In addition, the inner tube 10 is formed to have a larger diameter, both ends of the shaft tube 32 is made of the exterior 30, the end of the shaft tube 32 of the exterior portion 30 is the inner tube 10 It is welded to the outer circumferential surface of the.

At this time, it is preferable that both sides of the outer appearance 30 correspond to the outer diameter of the inner tube 10, the shaft tube (32).

In addition, the inner tube 10 and the exterior 30 should be installed so that the space portion 33 is formed in the same width.

In addition, both ends of the inner tube 10 are welded and fixed to the connecting tube 40 having the same diameter as the end diameter of the shaft tube 12 of the inner tube 10 and having a predetermined length.

7A and 7B are cross-sectional views illustrating a second embodiment of an exhaust muffler of an automobile according to the present invention, and a state diagram of use thereof, in which the structure of the exhaust muffler of the automobile is formed in the same configuration as the first embodiment. A protruding through hole 15 is formed in the front end portion of the inner tube 10 so as to protrude inward, and a protruding through hole 15 is formed in the rear end so as to protrude outward.

At this time, the protruding through hole 15 is formed in a funnel shape, the protruding through hole 15 of the front end portion is formed so that the end portion protruding into the inner tube 10 has a small diameter, and the protruding through hole 15 of the rear end is formed. It is preferable to form an end projecting outward to have a small diameter.

On the other hand, the manufacturing method of the sub-muffler for the exhaust system of the vehicle according to the second embodiment of Fig. 7a, 7b is made in the same manner as the first embodiment, the method of drilling the through hole 13 in the inner tube 10 and the through hole The methods of punching (15) are different from each other.

That is, in the first embodiment, the through-hole 13 is formed by perforating the inner tube 10 having a pipe shape, but in the second embodiment, the inner tube 10 having a plate shape is provided, After the two protruding through-holes 15, they are rolled and welded into a circular pipe shape.

Referring to the state of use of the exhaust muffler for automobile exhaust apparatus according to the present invention having such a configuration as follows.

2 to 6, the catalytic converter 50 is coupled to one connection pipe 40 of the sub muffler 1 so as to communicate with the other, and the other connection pipe 40 includes a main muffler ( In the initial state in which the 60 is coupled to communicate with each other, when the driving of the engine 70 is performed, that is, the intake, compression, expansion (explosion), and exhaust stroke, the fuel supplied in the expansion process is combusted, and a certain amount of exhaust gas is burned. Is generated, and the generated exhaust gas is collected in the exhaust manifold 80 of the engine 70, and then carbon monoxide, hydrocarbons, nitrogen oxides, and the like are catalyzed by the catalytic converter 50 through the connection pipe 40 connected thereto. After being reduced, it is continuously transferred to the sub muffler 1 through the connecting pipe 40. The exhaust gas is introduced into the main muffler 60 after the primary noise is made in the sub muffler 1, and then, the secondary muffler 60 is introduced. It is noise-treated and discharged to the outside.

At this time, in the process of passing the exhaust gas through the sub muffler 1, a vortex is formed by the screw member 20 built into the sub muffler 1, thereby increasing the flow rate of the exhaust gas, thereby increasing a faster transfer speed. Is discharged.

That is, the screw member 20 installed in the sub muffler 1 is formed by twisting a plurality of wings 21 on the outer surface, such as a screw shape, the exhaust gas introduced into the inner tube 10 of the screw member 20 While rotating like a whirlwind along the wing 21, the acceleration is attached, so that the flow rate is faster.

In addition, since a plurality of through holes 13 are perforated on both sides of the inner tube 10, the exhaust gas passes through the screw member 20 and spirals vortically as described above. (10) is introduced into the through hole formed in the rear end and is discharged back to the front end hole 13 through the space portion 33 between the inner tube 10 and the exterior 30 (that is, siphon phenomenon-discharge of exhaust gas). Phenomenon sucked by pressure) By allowing the flow rate of the exhaust gas introduced into the inner tube 10 to proceed more quickly, the exhaust gas is smoothly discharged to prevent stagnation in the engine, thereby increasing the overall engine output. In addition, it is possible to reduce the fuel by increasing the combustion rate of the fuel to be completely burned.

In this way, since the exhaust gas is not stagnated inside the engine 70, when the gas is stuck inside the engine 70 due to the impurities mixed in the exhaust gas, the engine 70 is not stacked. ), The combustion power of the fuel can be improved to increase the output, and the fuel can be completely burned, thereby reducing the amount of exhaust gas generated due to incomplete combustion.

In addition, the fine particles of contaminants mixed in the exhaust gas are quickly discharged and do not leave the lamination on the inner surface of the muffler, thereby preventing the submuffler 1 from being oxidized and corroded due to the lamination of the contaminants.

In addition, the heat of the engine 70 may be prevented from being overheated by rapidly discharging not only the exhaust gas but also the heat of the engine 70. Catalytic reactions can be made to increase the catalytic efficiency .

For reference, the catalytic converter 50 may be more than 700 ℃ to increase the catalyst efficiency.

In addition, when the acceleration pedal is pressed during high-speed driving, some residual exhaust gas is quickly discharged along with the newly generated exhaust gas, which acts like a turbo to increase the instantaneous acceleration force, which is effective when passing other vehicles or driving on hills.

On the other hand, Table 1 below shows the change amount of the pedal between the vehicle equipped with a sub muffler according to the present invention (applied vehicle is based on a sonata) and a vehicle equipped with a conventional sub muffler, and the rotational speed (rpm) ) And speed.

 Pedal change amount (cm)  Rpm Vehicle speed with conventional sub muffler (km / h) Vehicle speed (km / h) equipped with the sub muffler of the present invention 0.5 1400 60 75 One 1800 70 85 1.5 2000 80 100 2 2400 100 120 2.5 2800 110 130 3 3200 120 140 3.5 4000 130 150

As shown in Table 1 above, the exhaust gas generated from the engine 70 by the sub muffler 1 according to the present invention causes vortices to be quickly discharged to one side, and a part of the exhaust gas is formed in the inner tube 10. Into the rear end of the through hole 13 and discharged to the front end of the through hole 13, the discharge flow rate of the exhaust gas is further increased, and the exhaust gas is prevented from stagnating inside the engine 70.

Therefore, as the overall engine output is improved, it can be seen that as the driver gradually accelerates the pedal, that is, the accelerator, the speed with respect to the rotational speed (RPM) of the vehicle is improved by about 20 km / h. .

Here, the speed value for the number of revolutions (RPM) of the vehicle is rounded or omitted, the numerical value for the decimal point, such data may vary slightly depending on the specification of the vehicle model.

As shown in the second embodiment of FIGS. 7A and 7B, a protruding through hole 15 is formed in the front end portion of the screw member 20 so as to protrude inward, and a protruding through hole 15 protrudes outward in the rear end portion. This is formed, so that the inlet and exhaust of the exhaust gas is made more smoothly.

That is, while the exhaust gas is introduced into the inner tube 10 at a strong pressure, a portion of the inner tube 10 is introduced through the protruding through hole 15 formed at the rear end of the inner tube 10, but the protruding through hole 15 is formed to protrude. The protruding portion acts as a guide according to the inflow of the exhaust gas, so that the exhaust gas can be smoothly introduced, and the inflowed exhaust gas is provided through the space portion 33 between the inner tube 10 and the exterior 30. It is discharged back to the protruding through hole 15 of the tip portion, and the exhaust gas is discharged more quickly along the protrusion as in the above.

In addition, the protruding through hole 15 is formed in a funnel shape, the protruding through hole 15 of the front end portion is formed so that the end portion protruding into the inner tube 10 has a small diameter, the protruding through hole 15 of the rear end is The tip protruding outward has a small diameter so that the exhaust gas is introduced and discharged at a higher pressure.

Accordingly, the exhaust action of the exhaust gas is more smoothly, and the exhaust gas is prevented from stagnating in the engine 70 to further improve the engine output, and also increase the combustion rate of the fuel so as to completely burn the fuel. Can reduce the cost.

On the other hand, the number of blades 21 of the screw member 20 mounted in the inner tube 10 is formed of three, but not limited to this, it is possible to manufacture at least two or more.

In addition, the screw member 20 is rotated so as to vortex when the exhaust gas passes through the sub muffler 1, the vortex method is the same, but may form the screw member 20 differently.

That is, the screw member 20 can also be formed by twisting the upper and lower surfaces of the band-shaped plate in the form of a nitrate.

The method and structure for manufacturing a submuffler for an exhaust system of an automobile according to the present invention form a plurality of through holes on both sides of an inner tube of the submuffler, and weld and fix the screw member to the inside so that the exhaust gas discharged from the engine passes through the screw member. Spiral vortex is quickly discharged to one side, and part of the exhaust gas flows into the through hole formed at the rear end of the inner tube and is discharged to the through hole at the front end, so the exhaust gas is discharged to the atmosphere at a higher speed, thereby increasing fuel combustion efficiency. In addition to increased power, the same fuel can be used to drive more distances.

In addition, since the pollutants of the fine particles mixed in the exhaust gas are quickly discharged and do not allow lamination on the inner surface of the muffler, the sub muffler can be prevented from being oxidized and corroded due to the lamination of the contaminants. .

In addition, not only the exhaust gas but also the engine heat is quickly discharged to cool the heat generated in the engine, so that the recirculating mission oil and the like not only prevents debris from being changed due to the overheated heat of the engine, but also quickly in the engine. The discharged heat further raises the heat of the catalytic converter, thereby having a smooth effect on the catalytic converter.

In addition, when the accelerator pedal is pressed during high-speed driving, some residual exhaust gas is discharged together with the newly generated exhaust gas, thereby acting like a turbo, thereby increasing the instantaneous acceleration force.

In addition, the amount of air sucked into the cylinder is increased due to the increase in the exhaust efficiency, so that complete combustion is possible, thereby reducing the emission of harmful substances, thereby preventing environmental pollution.

Claims (3)

Cutting the pipe to a predetermined length and drilling a plurality of through holes on both sides, and then conduit the one end (S10); Welding and fixing the prepared screw member in a pipe (S20); Forming an inner tube by condensing the other end of the pipe (S30); (S40) condensing both sides of the exterior having a larger diameter than the inner tube so as to correspond to the inner tube outer diameter; Inserting the inner tube into the outer tube, and welding the distal end portion of the outer tube to the inner tube outer surface (S50); Step (S60) of connecting both ends of the inner tube of the completed sub-muffler; Sub-muffler manufacturing method for a vehicle exhaust system characterized in that consisting of. In the sub-muffler for the exhaust system of the vehicle to exhaust the exhaust gas generated by the driving of the automobile engine through the catalytic converter to remove the harmful substances and discharge them to the silencer, An inner tube 10 formed in a pipe shape and having both ends thereof formed with a shaft tube 12, and a plurality of through holes 13 formed in the front and rear ends thereof; A screw member 20 which is internally welded and fixed inside the inner tube 10 to vortex the exhaust gas to increase the exhaust flow rate; An exterior 30 formed to have a diameter larger than that of the inner tube 10, and both ends of which are axial tube 32 welded to the outer surface of the inner tube 10; A submuffler structure for an exhaust system of an automobile, characterized by comprising a connecting pipe (40) welded and fixed to both ends of the inner pipe (10). The method of claim 2, Sub-muffler structure for the exhaust system of a vehicle, characterized in that the protruding through hole 15 is formed in the front end portion of the inner tube 10 so as to protrude inward, and the protruding through hole 15 is formed in the rear end portion so as to protrude outward. .

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