KR100793316B1 - Vehicle exhaust system with exhaust balance and orifice tube - Google Patents

Abstract

The present invention relates to an exhaust device of a vehicle equipped with an exhaust balance and an orifice tube, which can reduce the back pressure of the vehicle exhaust system and increase the exhaust velocity of the exhaust gas.

According to the present invention, an exhaust pipe for guiding exhaust gas into the atmosphere is piped, a catalytic converter is formed in the middle of the exhaust pipe at the rear side of the exhaust manifold, and a silencer is formed at the rear side of the exhaust pipe to reduce exhaust noise. An inlet pipe and an outlet pipe for introducing and discharging exhaust gas are respectively formed at both ends of a housing of a muffler, each of which is partitioned into a plurality of chambers, and each chamber is configured to communicate with an inner pipe. An orifice tube is formed in front of the pipe to reduce the passage cross-sectional area of the exhaust gas so that the flow rate is increased, and an exhaust balance having a predetermined volume to temporarily receive a portion of the exhaust gas flowing in the middle of the exhaust pipe connected to the inlet pipe of the silencer is provided. Characterized in that formed.

Exhaust system, silencer, exhaust balancer, orifice tube

Description

Exhausting apparatus assembled the exhaust balancer and the orifice pipe}

1 is a block diagram of a conventional general vehicle exhaust system.

Figure 2 is a cross-sectional view of a conventional general silencer.

3 is a block diagram of a vehicle exhaust system according to an embodiment to which the present invention is applied.

Figure 4 is a flow chart of the exhaust gas of the vehicle exhaust system according to an embodiment of the present invention.

5 is a configuration diagram of a vehicle exhaust system according to another embodiment to which the present invention is applied.

6 is an exhaust gas flow chart of a vehicle exhaust system according to another embodiment of the present invention.

※ Explanation of code for main part of drawing

30: exhaust pipe 32: exhaust balancer

40,50: Silencer 41,51: Muffler Housing

42,52: Inlet Pipe 43,53: Outlet Pipe

44,45, 54,55: inner pipe 46,56: front chamber

47,57: intermediate chamber 48,58: rear chamber

49,59: bulkhead 60, 70: orifice tube

The present invention relates to an exhaust device of a vehicle provided with an exhaust balance and an orifice tube, and more particularly, an exhaust balance for reducing back pressure in the middle of a vehicle exhaust system for guiding exhaust gas generated from an engine to the rear of the vehicle. In addition, an orifice tube is formed on the way to increase the speed of the exhaust gas passing through the silencer, thereby reducing the back pressure of the vehicle exhaust system and increasing the exhaust speed of the exhaust gas. It relates to an exhaust device.

The exhaust system of the vehicle not only purifies the exhaust gas discharged from the engine through the catalytic converter, but also lowers the temperature by passing the exhaust pipe, which is long in length, and passes the silencer provided in the middle of the exhaust pipe to explode the noise of the engine. It is made for the purpose of attenuating.

1 is a view illustrating an exhaust system of a general vehicle, in which an exhaust pipe 11 is piped between the silencer 20 and the exhaust manifold 10 of the engine, which are usually located at the rear of the vehicle, and the exhaust manifold 11 In the rear exhaust pipe, a catalytic converter 12 is provided for purifying exhaust gas components of carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), and the like, which are harmful to human bodies. In such a catalytic converter, a catalyst made of platinum, palladium, rhodium, or the like is accommodated to oxidize and reduce harmful components such as CO, HC, and NOx to harmless components such as CO ₂ , H ₂ O, and H ₂ .

FIG. 2 is a view for explaining the silencer structure of a general vehicle exhaust system. An end of the exhaust pipe 11 is connected to the front side of the muffler housing 21 of the silencer 20, which is generally called a muffler, and the muffler housing 21 The tail pipe 13 is connected to the rear side of the. The muffler housing 21 is divided into a plurality of chambers 26, 27, 28, and the exhaust gas introduced from the exhaust pipe 11 side can be discharged to the atmosphere through the tail pipe 13 between the chambers. Form a structure that communicates with one another.

In other words, an inlet pipe 22 is formed at the front side of the muffler housing 21 to be connected to the exhaust pipe 11 to allow the exhaust gas to flow in. At the rear side thereof, an outlet pipe 23 for connecting the tail pipe 13 to the exhaust pipe 11 is formed. Inner pipes 24 and 25 are formed in the middle of the partition wall 29 partitioning the chambers to guide the exhaust gas introduced from the inlet pipe 22 to the outlet pipe 23.

On the other hand, in order to reduce the back pressure of the exhaust gas passing in the front or rear of the inner pipe may be supplied and used with a silencer having a back pressure control valve or the like that is automatically opened or closed according to the back pressure or the opening degree is adjusted.

However, when a separate back pressure control valve is installed inside the silencer for reducing the back pressure of the vehicle exhaust system, the structure is complicated, and there is a problem such that the role of the silencer can not be fulfilled when the back pressure control valve is fixed.

In addition, since there is no device for speeding up the speed at which the exhaust gas introduced into the silencer is discharged to the outside of the silencer, there is a problem that the flow of the exhaust gas is delayed inside the silencer.

Therefore, the present invention has been made to solve the problems of the prior art as described above, not only is provided with an exhaust balance for reducing the back pressure in the middle of the vehicle exhaust system for guiding the exhaust gas generated from the engine to the rear of the vehicle, An orifice tube is formed on the way to increase the speed of the exhaust gas passing through the silencer, thereby reducing the exhaust pressure of the vehicle exhaust system and increasing the exhaust velocity of the exhaust gas. The purpose is to provide.

The present invention is a means for achieving the object of the invention as described above, the exhaust pipe for guiding the exhaust gas generated in the engine to the atmosphere is piped, a catalytic converter is formed in the middle of the exhaust pipe on the rear side of the exhaust manifold, In the rear side of the exhaust pipe, a silencer is formed to reduce exhaust noise. Inlet pipes and outlet pipes for inflow and exhaust of exhaust gas are formed at both ends of the housing of the silencer, which is partitioned into a plurality of chambers. In the exhaust system of a vehicle formed to communicate with the inner pipe, an orifice tube is formed in front of the outlet pipe of the muffler to reduce the passage cross-sectional area of the exhaust gas to increase the flow rate, and in the middle of the exhaust pipe connected to the inlet pipe of the muffler Some of the flowing exhaust gas is temporarily It is characterized in that the exhaust balance having a predetermined volume so as to form.

Further, in the present invention, the front end of the orifice tube is branched from the exhaust pipe in front of the muffler and the rear end thereof is located in front of the outlet pipe exposed to the front chamber, and the rear end of the inlet pipe to which the exhaust pipe is connected is the rear chamber. It is characterized in that it is formed to be exposed to.

In addition, in the present invention, the rear end of the inlet pipe and the outlet pipe are arranged in a straight line at a position apart from the diaphragm partitioning between the chambers, the orifice pipe between the rear end of the inlet pipe and the front end of the outlet pipe Characterized in that formed.

In addition, the front end of the outlet pipe in the present invention is characterized in that the pipe is formed in a funnel shape.

Hereinafter, a preferred embodiment according to the configuration and operation of the vehicle exhaust apparatus according to the present invention will be described in detail with the accompanying drawings.

Figure 3 is a block diagram of a vehicle exhaust system according to an embodiment to which the present invention is applied, Figure 4 is a flow chart of the exhaust gas of the vehicle exhaust system according to an embodiment of the present invention, Figure 5 is according to another embodiment to which the present invention is applied 6 is a configuration diagram of a vehicle exhaust system, and FIG. 6 is a flow chart of an exhaust gas of a vehicle exhaust system according to another embodiment of the present invention.

For convenience of description, each chamber partitioned inside the silencer will be referred to as a front chamber, an intermediate chamber, and a rear chamber based on the front and rear of the vehicle. Meanwhile, an inlet pipe, an outlet pipe, or an inner pipe are formed in the middle of the diaphragm for partitioning each chamber so that the exhaust gas introduced through the inlet pipe can be discharged into the atmosphere through the outlet pipe.

First, in the case of the silencer 40 according to the embodiment of the present invention as shown in FIG. 3, the rear end of the inlet pipe 42 is piped so as to be exposed to the rear chamber 43, whereas the outlet pipe 43 Inner pipes (44, 45) for communicating between the chambers are piped so as to be exposed to the front chamber (46), and each diaphragm (49) located on the front and rear sides of the intermediate chamber (47). Will be piped. In particular, the passage cross-sectional area of the exhaust gas is narrowed from the middle of the exhaust pipe 30 connected to the inlet pipe 42 to the front position of the outlet pipe 43 exposed to the front chamber 46 so that the flow rate of the exhaust gas is increased. An orifice pipe 60 for piping is piped.

Meanwhile, in the case of the silencer 50 according to another embodiment of the present invention as shown in FIG. 5, the rear end of the inlet pipe 52 is exposed to the front chamber 56 and the front end of the outlet pipe 53. Is exposed to the intermediate chamber 57, and inner pipes 54 and 55 are piped between the front chamber 56 and the rear chamber 58 and between the intermediate chamber and the rear chamber 58, respectively. In particular, in the structure of the silencer 50 as shown in FIG. 4, the inlet pipe 52 and the outlet pipe 53 are piped in a straight line to each other, and pass a part of the exhaust gas emitted from the inlet pipe 52. An orifice tube 70 is formed to accelerate the flow rate of the exhaust gas in the process.

The orifice tubes 60 and 70 formed in the respective silencers 40 and 50 shown in FIGS. 3 and 5 allow a part of the exhaust gas introduced into the silencers 40 and 50 from the exhaust pipe 30 side. By increasing the flow rate in the process, after passing through each chamber of the muffler (40, 50) to pass through the outlet pipe to the speed of the exhaust gas discharged into the atmosphere more. That is, all or most of the exhaust gas flowing into the silencers 40 and 50 through the exhaust pipe 30 is introduced into the silencers 40 and 50 through the inlet pipes 42 and 52, but passes through the inlet pipe. It is configured to obtain a pressing force for increasing the flow rate of the exhaust gas passing through the outlet pipe (43,53) by using a portion of the exhaust gas after the process or the passage. In the present invention as a means for achieving this purpose, orifice tubes (60, 70) are formed in the silencers (40, 50).

On the other hand, the front end of the outlet pipe (43, 53) is a funnel to make the flow of the pressurized exhaust gas passing through the orifice pipe (60, 70) and the main stream exhaust gas flowing through the interior of the silencer more smoothly It is preferable to expand into a shape.

In the present invention, at least one exhaust balancer 32 is formed in the middle of the exhaust pipe 30 as a means for reducing the back pressure of the exhaust gas passing through the vehicle exhaust system. The exhaust balancer 32 forms a tubular structure having a predetermined volume therein, and serves to reduce a back pressure of the exhaust system by accommodating a part of the exhaust gas in the process of flowing the exhaust gas through the exhaust pipe. will be. In other words, when the pressure of the exhaust gas is high, a part of the exhaust gas is stored, and when the pressure of the exhaust gas is lowered, the gas is naturally released by the pressure difference to increase the pressure of the exhaust gas of the main stream.

In the drawings for explaining the structure of the vehicle exhaust system according to the present invention, it is shown that the exhaust balancer is formed only on the front side of the silencers 40 and 50, but the exhaust balancer 32 is the front and rear of the catalytic converter or the front and rear of the silencer. It can be formed in many places, such as. The exhaust pipe 30 and the exhaust balancer 32 are connected by a connecting pipe 34 having a narrow cross-sectional area.

Reference numerals 41 and 51 which are not described in the drawings indicate the muffler housings of the silencers, respectively. In the drawings for explaining the present invention, the interior of the muffler housing is partitioned into three chambers. This is just one example of a silencer.

Hereinafter, the operating state of the vehicle exhaust system according to the present invention will be described with the accompanying drawings.

First, as shown in FIGS. 3 to 4, the silencer 40 is formed such that the rear end of the inlet pipe 42 is exposed to the rear chamber 48 and the front end of the outlet pipe 43 is exposed to the front chamber 46. In the case of a portion of the exhaust gas generated during the operation of the engine flows through the orifice tube 60 formed while branching from the exhaust pipe (30). Except for the exhaust gas introduced into the orifice tube 60, most of the exhaust gas is introduced into the rear chamber 48 through the inlet pipe 42.

The exhaust gas introduced into the rear chamber 48 through the inlet pipe 42 passes through the intermediate chamber 47 communicated with the inner pipe 45, and then flows back through the inner pipe 44 to the front chamber 46. After that, it passes through the outlet pipe 43 and is discharged to the atmosphere.

However, since the orifice pipe 60 has a wider cross-sectional area in the front side (part branched from the exhaust pipe) than the rear cross-sectional area, the flow velocity becomes faster toward the rear side. The exhaust gas passing through the orifice tube 60 and the flow rate is faster, pressurizes the exhaust gas of the main stream inputted to the outlet pipe 43, thereby increasing the flow rate of the entire exhaust gas discharged to the outside through the silencer. Therefore, an increase in the back pressure due to the stagnation of the exhaust gas flow inside the silencer is prevented.

Next, as shown in FIGS. 5 to 6, the rear end of the inlet pipe 50 is exposed to the front chamber 56 and the front end of the outlet pipe 53 is exposed to the intermediate chamber 57. In 50, a portion of the exhaust gas introduced into the front chamber 56 passes through the orifice tube 70 provided in the partition wall 59 that divides the front chamber 56 and the intermediate chamber 57.

After the main flow of the exhaust gas introduced into the front chamber 56 is moved to the rear chamber 58 through the inner pipe 54, the inner pipe 55 provided between the intermediate chamber 57 and the rear chamber 58 is again provided. ) Flows into the intermediate chamber 57. The exhaust gas of the periodic flow introduced into the intermediate chamber 57 is introduced into the inlet of the outlet pipe 53 and then discharged into the atmosphere.

In this process, the pressurized exhaust gas passing through the orifice tube 70 and the flow rate is accelerated pressurizes the flow of the exhaust gas introduced into the outlet pipe 53 so that the flow rate of the entire exhaust gas discharged to the outside through the silencer is faster. You lose. Therefore, an increase in the back pressure due to the stagnation of the exhaust gas flow inside the silencer is prevented.

On the other hand, since at least one exhaust balancer 32 is formed in the middle of the exhaust pipe 30 for guiding the exhaust gas generated in the engine to the muffler side, the exhaust gas of a relatively high pressure state is discharged during the engine operation. As part of the exhaust gas is accommodated in the exhaust balancer 32 in the process, the back pressure of the entire exhaust system is reduced to a certain level.

The exhaust gas contained in the exhaust balancer 32 is led to the exhaust pipe 30 in the course of flowing the exhaust gas at a relatively low pressure and is discharged into the atmosphere.

The exhaust system of the vehicle configured as described above can not only automatically adjust the back pressure of the exhaust gas through the exhaust balancer, but also increase the flow rate of the exhaust gas passing through the silencer, which can cause the exhaust gas to stagnate inside the silencer. By reducing the overall flow of exhaust gas can be made quickly, there is a big advantage that can ultimately lead to improved engine output and fuel economy of the vehicle.

Claims (4)

An exhaust pipe for guiding exhaust gas generated in the engine to the atmosphere is piped, a catalytic converter is formed in the middle of the exhaust pipe at the rear side of the exhaust manifold, and a silencer is formed at the rear side of the exhaust pipe to reduce exhaust noise. In both ends of the housing of the silencer partitioned into a plurality of chambers are formed inlet pipe and outlet pipe for the inlet and exhaust of exhaust gas, respectively, each chamber is formed in the exhaust system of the vehicle is formed to communicate with the inner pipe, An orifice tube is formed in front of the outlet pipe of the muffler to reduce the passage cross-sectional area of the exhaust gas so that the flow velocity is increased, and a predetermined volume is provided so that a part of the exhaust gas flowing is temporarily accommodated in the middle of the exhaust pipe connected to the inlet pipe of the muffler. Branches have an exhaust balance, The front end of the orifice tube is branched from the exhaust pipe in front of the muffler so that its rear end is located in front of the outlet pipe exposed to the front chamber, and the rear end of the inlet pipe to which the exhaust pipe is connected is formed to be exposed to the rear chamber. An exhaust device for a vehicle provided with an exhaust balance and an orifice tube. The method of claim 1, The rear end of the inlet pipe and the outlet pipe are arranged in a straight line at a position apart from the diaphragm partitioning between the chamber, characterized in that the orifice tube is formed between the rear end of the inlet pipe and the front end of the outlet pipe. Exhaust system of vehicle equipped with exhaust balance and orifice tube. The method according to claim 1 or 2, The front end of the outlet pipe is exhaust pipe of the vehicle equipped with an exhaust balance and an orifice tube, characterized in that the expansion formed in a funnel shape. delete

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