JP2869760B2 - Silencer with carbon recovery function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muffler having a carbon recovery function, and more particularly to a muffler having a carbon recovery function for reliably recovering carbon discharged from an engine mounted on a vehicle while reducing exhaust noise of the engine. To a silencer having the same.

[0002]

2. Description of the Related Art Generally, engines include a gasoline engine, a diesel engine, a rotary engine, and the like.
A muffler called "silencer" or "muffler" is mounted in the exhaust system to reduce exhaust noise.

[0003] This silencer can be classified in principle into an expansion type, a resonance type, an interference type and the like, and is basically provided with a sound absorbing material therein.

[0004] In recent years, regulations on exhaust gas from vehicles, particularly vehicles equipped with a diesel engine, have tended to be strengthened, and countermeasures have been studied.

That is, a diesel engine can inject light oil after strongly compressing intake air and cause an explosion without ignition, and since it does not have a carburetor like a gasoline engine, the The suction efficiency is high and the heat efficiency is high due to the long combustion time.
It consumes less fuel and is more economical than gasoline engines.

However, due to the high compression pressure and explosion pressure, the weight of the diesel engine increases, the noise and vibration are large, the maximum engine speed cannot be increased, and it is difficult to reduce the size. It is installed.

[0007]

The conventional silencer has only the original function of the silencer, that is, the function of reducing exhaust noise from a gasoline engine or a diesel engine. There is no one that has a function capable of recovering carbon, which is a harmful component in exhaust gas emitted from a vehicle.

For this reason, there is a disadvantage that carbon as black smoke is emitted from a vehicle equipped with a diesel engine, which is one of the factors of air pollution.

Although a carbon recovery device separate from the muffler has been developed, it is difficult to lay out the vehicle in a limited installation space of the vehicle. There is an inconvenience that it becomes large and is practically disadvantageous.

[0010]

SUMMARY OF THE INVENTION Accordingly, in order to eliminate the above-mentioned disadvantages, the present invention provides a silencer connected to an exhaust system of an engine and functioning to reduce exhaust noise, in which a plurality of expansion chambers are connected. Forming an expansion-type muffler, and providing an injection nozzle for injecting a mist-like solution having a predetermined pressure into at least one expansion chamber of the muffler, and at a downstream side of the expansion chamber in which the injection nozzle is disposed. At the rear end side of another expansion chamber located there is provided a moisture shielding member having a function of evaporating moisture to be passed due to high temperature by exhaust heat and dropping to the bottom, and injecting a mist-like solution from the injection nozzle. A compression section for pressure-feeding the solution through the pressure passage; a solution tank connected to the compression section via a first supply path; a collection section provided at the bottom of the expansion chamber; Solution recovery via A filter and a collecting suction unit are provided in the middle of the collecting passage for separating the solution and the carbon atomized by the mist-like solution from the injection nozzle and the product in the exhaust gas into fine powder, The solution recovery tank and the compression unit are provided in communication with each other by a second supply passage, and a preliminary recovery unit connected to the filter is provided at the bottom of the another expansion chamber.

[0011]

According to the invention as described above, when recovering carbon, a spray solution of a predetermined pressure is sprayed from a spray nozzle into at least one expansion chamber of the silencer, and exhaust gas is discharged by the spray solution. After cooling, the product in the exhaust gas is pulverized to carbon, and the solution and carbon are collected from the collecting section at the bottom of the expansion chamber, the solution and carbon are separated by a filter, and the separated solution is suctioned to the suction section. The carbon is effectively removed from the exhaust gas by returning to the solution recovery tank via the tank. Further, the moisture that is going to pass through the moisture shielding member on the rear end side of the other expansion chamber located downstream from the expansion chamber in which the injection nozzle is disposed is vaporized by the moisture shielding member that is heated by the exhaust heat, Collected after falling to the bottom.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 3 show an embodiment of the present invention. In FIG. 1, reference numeral 2 denotes a silencer which is connected to an exhaust system and functions to reduce exhaust noise, 4 denotes an engine not shown,
For example, an exhaust pipe of a diesel engine.

The silencer 2 includes, for example, four first to fourth
The expansion chambers 6-1, 6-2, 6-3, and 6-4 are connected to each other, and are formed in a cylindrical expansion shape.

The downstream end of the exhaust pipe 4 connected to the upstream side of the muffler 2 is connected to a first opening 8-1 for communicating the outside with the first expansion chamber 6-1. This first opening 8-1 is
It is formed on the first partition 10-1.

A second opening 8-2 connecting the first and second expansion chambers 6-1 and 6-2 is provided in the second partition 10-2, and the second and third expansion chambers 6-2 and 6-2 are provided. A third opening 8-3 connecting 6-3 is provided in the third partition 10-3, and a fourth opening 8-4 connecting the third and fourth expansion chambers 6-3 and 6-4 is formed in the fourth partition 10. -5, and a fifth opening 8-5 for connecting the fourth expansion chamber 6-4 to the outside is provided in the fifth partition 10-5.

These first to fifth openings 8-1, 8-2,
The opening positions of 8-3, 8-4, and 8-5 are shown in FIGS.
As shown in (e), the first opening 8-1 is formed in the first partition 10.
-1, and the second opening 8-2 is formed in the second partition 1
0-2 While forming at the position shifted to the left from the center,
The third opening 8-3 is formed at a position closer to the right side from the center of the third partition 10-3, and the fourth opening 8-4 is formed in the second opening 8
Similarly to -2, the fourth partition 10-4 is formed at a position closer to the left from the center, and the fifth opening 8-5 is formed at the center of the fifth partition 10-5.

The rear end side of the third expansion chamber 6-3 located downstream of the second expansion chamber 6-2, that is, the fourth opening 8-.
A moisture shielding member 12 is provided on one side of the fourth partition wall 10-4 where the 4 is formed. The moisture shielding member 12 is heated to a high temperature by the exhaust heat, evaporates the moisture to pass, and allows a large amount of moisture to pass. If you do, liquefy the water,
It is to drop to the bottom of the third expansion chamber 6-3.

A spray nozzle 14 for spraying a mist solution at a predetermined pressure is provided in at least one expansion chamber 6 of the muffler 2, and a pressure feed passage 16 is formed to spray the mist solution from the spray nozzle 14. Compressor 18 for pumping solution through
And a first supply passage 20 in the compression section 18.
The recovery tank 24 is provided at the bottom of the expansion chamber 6, and a recovery passage 26 is provided in the recovery section 24.
A solution collection tank 28 is connected and provided through the liquefied gas, and the solution in the middle of the collection passage 26 is separated from carbon atomized by the mist-like solution from the injection nozzle 14 and the product in the exhaust gas is pulverized. A filter 30 and a suction unit 32 for collection are provided, and the solution collection tank 28 and the compression unit 18 are connected to each other by a second supply passage 34.

More specifically, the second expansion chamber 6 of the silencer 2
-2, the two front and rear portions and the second as shown in FIG.
Four injection nozzles 14 are provided at a total of four locations, two locations directed to a substantially central portion of the expansion chamber 6-2.

Further, in the middle of the pressure feed passage 16 which connects the injection nozzle 14 and a compression section 18 composed of a compression pump,
A regulator 36 for setting the injection pressure of a solution, for example, water, to a predetermined pressure is provided.
Are communicated by the return passage 38, and the excess pressure in the regulator 36 is returned to the solution tank 22 by the return passage 38.

Further, at the bottom of the second expansion chamber 6-2,
As shown in FIGS. 1 and 2, a main recovery unit 24 is provided, and a sub-recovery recovery unit 40 is provided at the bottom of the third expansion chamber 6-3.
And a solution collecting tank 28 connected to the tank via a collecting passage 26, and, for example, two first and second filters 30-1 and 30-3 for separating water and carbon in the collecting passage 26.
0-2 and a collection suction unit 32 including a suction pump are sequentially provided.

The first and second filters 30-1 and 30-
Numeral 2 is made of ceramic or other material, and is provided in a removable cartridge type so as to perform a predetermined treatment after carbon recovery.

The solution tank 22 and the solution recovery tank 28 are supplied with about 50 liters of water in total.

The four injection nozzles 14, the compression unit 18, the collection suction unit 32, and the regulator 36 are connected to a control unit 42 composed of a computer, respectively. It is controlled to perform the operation.

The control unit 42 can use the computer if the computer is previously mounted on the vehicle (not shown). If the computer is not mounted on the vehicle, a new computer can be used. It should be equipped with.

Next, the operation will be described.

When recovering carbon in exhaust gas,
Mist water of a predetermined pressure is injected from the injection nozzle 14 into the second expansion chamber 6-2 of the silencer 2, and the exhaust gas flowing down through the exhaust pipe 4 is rapidly cooled by the mist water,
The product in the exhaust gas is pulverized into carbon.

Then, water and carbon are supplied to the second expansion chamber 6-
2 and the water and carbon are collected from the collecting part 24, and the water dropped to the bottom by the moisture shielding member 12 in the third expansion chamber 6-3 is collected from the preliminary collecting part 40, And water and carbon are separated by the second filters 30-1 and 30-2. The water after the separation is returned to the solution recovery tank 28 via the suction part 32, and effectively removes carbon from the exhaust gas.

At this time, the water returned to the solution recovery tank 28 is supplied to the compression section 18 through the second supply passage 34 so as to be injected again into the second expansion chamber 6-2.

Thus, the carbon in the exhaust gas is reduced by about 8
It is possible to remove about 0%, it is possible to reduce the amount of black smoke emission, it is possible to eliminate the factors that cause air pollution,
It is practically advantageous.

The addition of the function of collecting carbon to the muffler 2 facilitates the layout of the muffler in a limited installation space for the muffler, and there is no fear that the installation space will be expanded. However, it is not complicated, the production is easy, the cost can be kept low, and it is economically advantageous.

Further, the control unit 42 can change the water injection amount according to the operating state of the vehicle (not shown), so that the effective carbon recovery can be performed and the usability is improved. obtain.

It should be noted that the present invention is not limited to the above-described embodiment, and various applications and modifications are possible.

For example, in the embodiment of the present invention, the carbon recovery operation is controlled by the control unit. However, the operation is started when the ignition switch of the vehicle is turned on, and is ended when the ignition switch is turned off.
It is also possible to eliminate the control unit.

In the embodiment of the present invention, FIG.
As shown in (a) to (e), the opening positions of the first to fifth openings formed in the first to fifth partitions are set, but the passage distance of the exhaust gas passing through the muffler is increased. It is also possible to set a position symmetrical to that of the above-described embodiment or another opening position.

Furthermore, in the embodiment of the present invention, the solution injected into the muffler was described as water. However, not only the chemicals are injected together with the water to recover the carbon, but also the carbon is used together with the carbon other than the carbon. It is also possible to configure so as to collect harmful components in the exhaust gas.

[0038]

As described above in detail, according to the present invention, in a silencer connected to an exhaust system of an engine and functioning to reduce exhaust noise, a plurality of expansion chambers are connected to form an expansion type silencer. A spray nozzle for injecting a mist solution of a predetermined pressure into at least one expansion chamber of the muffler, and the other expansion chamber located downstream of the expansion chamber in which the injection nozzle is disposed. A moisture shielding member having a function of evaporating moisture to be passed due to high temperature due to exhaust heat and dropping to the bottom at the rear end side, and pressure-feeding the solution through a pressure-feeding passage so as to spray a mist-like solution from a spray nozzle. A compression section is provided, a solution tank is connected to the compression section via a first supply passage, a recovery section is provided at the bottom of the expansion chamber, and a solution recovery tank is connected to the recovery section via the recovery path. Along with collection passage A filter for separating the solution and carbon atomized by the atomized solution from the spray nozzle into finely divided products in the exhaust gas; and a collection suction unit, and a solution supply tank and a compression unit are connected to the second supply passage. A preliminary recovery section is provided at the bottom of the other expansion chamber to communicate with the filter, so that about 80% of the carbon in the exhaust gas can be removed, reducing the amount of black smoke emitted. As a result, factors that cause air pollution can be eliminated. In addition, the addition of the function of collecting carbon to the muffler facilitates the layout in the limited installation space for the muffler of the vehicle, and there is no fear that the installation space is expanded, and the configuration is complicated. In addition, it is easy to manufacture, can keep costs low, and is economically advantageous. Furthermore,
If the control unit changes the injection amount of the solution according to the driving state of the vehicle, the carbon can be effectively collected, and the usability can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a muffler showing an embodiment of the present invention.

FIG. 2 is a schematic sectional view of a second expansion chamber.

FIG. 3A is a schematic view showing an opening position of a first opening formed in a first partition. (B) It is the schematic which shows the opening position of the 2nd opening formed in the 2nd partition. (C) It is the schematic which shows the opening position of the 3rd opening formed in the 3rd partition. (D) It is the schematic which shows the opening position of the 4th opening formed in the 4th partition. (E) It is the schematic which shows the opening position of the 5th opening formed in the 5th partition.

[Explanation of symbols]

 2 silencer 4 exhaust pipe 6-1 first expansion chamber 6-2 second expansion chamber 6-3 third expansion chamber 6-4 fourth expansion chamber 8-1 first opening 8-2 second opening 8-3 second 3 opening 8-4 4th opening 8-5 5th opening 12 Moisture shielding member 14 Injection nozzle 16 Pressure feed passage 18 Compression unit 20 First supply passage 22 Solution tank 24 Recovery unit 26 Recovery passage 28 Solution recovery tank 30 Filter 30-1 , 30-2 First and second filters 32 Collection suction unit 34 Second supply passage 36 Regulator 38 Return passage 40 Preliminary collection unit 42 Control unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F01N 3/04 F01N 1/16 F01N 3/02

Claims (1)

(57) [Claims] In a muffler connected to an exhaust system of an engine and functioning to reduce exhaust noise, a plurality of expansion chambers are connected to form an expansion-type muffler, and at least one of the mufflers is provided. expansion were provided with Rutotomoni the injection nozzle is provided an injection nozzle for injecting atomized solution of a predetermined pressure in the expansion chamber
Exhaust heat at the rear end of another expansion chamber located downstream from the chamber
Evaporates the water that is going to pass through the
The water barrier member having a function of dropping the provided via a pumping passage in order to inject atomized solution from the injection <br/> morphism nozzle solution compression unit for pumping provided, first fed to the compressor unit A solution tank is connected via a passage, a recovery section is provided at the bottom of the expansion chamber, and a solution recovery tank is connected to the recovery section via a recovery path, and the solution and the jet are injected in the recovery path. A filter for separating carbon, which is cooled by the mist-like solution from the nozzle and the product in the exhaust gas is pulverized, and a suction unit for collection, and the solution collection tank and the compression unit are connected by a second supply passage. Provided and the other
At the bottom of the expansion chamber, there is a preliminary recovery section that communicates with the filter.
Muffler having a carbon recovery function, characterized by comprising.