JPH0592415U - Muffler for engine - Google Patents

Abstract

(57) [Summary] (Modified) [Configuration] An introduction pipe capable of introducing the exhaust gas G while accommodating the liquid catalyst L capable of removing or reducing harmful components in the exhaust gas in the liquid storage portion 10 in the muffler body. The part 12 is provided,
A part of the plurality of discharge holes 16 for discharging the exhaust gas formed in the introduction pipe part into the liquid storage part is exposed on the liquid surface of the liquid catalyst, and the rest is dive below the liquid surface. ing. [Effect] The harmful components in the exhaust gas are removed or reduced by the contact action with the liquid catalyst, and the exhaust gas is released inside the liquid catalyst and on the liquid surface of the liquid catalyst. Even if the liquid catalyst freezes, the exhaust gas is released onto the liquid surface of the liquid catalyst, and is thus melted by the heat of the exhaust gas.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a muffler for an engine such as a diesel engine or a gasoline engine.

[0002]

[Prior Art]

Today, due to the rapid increase in the number of automobiles, boilers, construction machines, etc., air pollution caused by exhaust gas from engines causes a serious pollution problem. Carbon monoxide in the exhaust gas (CO), nitrogen oxides (NO _X), hydrocarbons (HC), since contain harmful contaminants such as lead (Pb).

Conventionally, as means for removing and reducing these harmful components, means for adjusting supply air and fuel injection amount, as disclosed in, for example, Japanese Patent Laid-Open Nos. 60-47841 and 62-267519. As disclosed in Japanese Patent Laid-Open No. 63-94036, by means of an exhaust gas recirculation device generally called EGR as a measure for preventing black smoke, or in Japanese Patent Laid-Open No. 63-117119, a structure inside a combustion chamber of an engine. Various proposals have been made such as those for improving.

[0004]

[Problems to be solved by the device]

 However, since the above-mentioned conventional means and devices are very difficult and expensive to install in vehicles such as existing automobiles and construction machines, boilers, etc., they may not be immediately effective as pollution control measures. I have a problem.

[0005]

[Means for Solving the Problems]

 The present invention is intended to solve these disadvantages, and the gist thereof is to form a plurality of muffling chambers in the muffler main body by partition walls and to sequentially form exhaust gas in each muffler chamber in the partition walls. A communication hole that allows passage is formed, and a liquid storage part that is connected to the most upstream silencing chamber is provided in the muffler body, and harmful components in exhaust gas can be removed or reduced in the liquid storage part. Introducing an introducing pipe section for accommodating the liquid catalyst and introducing the exhaust gas, and disposing a plurality of discharge holes for discharging the exhaust gas into the liquid storage section in the introducing pipe section. In the muffler for an engine, a part of the discharge hole is exposed above the liquid surface of the liquid catalyst, and the rest is located below the liquid surface.

Further, it is desirable to dispose a baffle plate against which exhaust gas collides, behind the communication hole.

[0007]

[Work]

 The exhaust gas is introduced into the liquid storage section through the introduction pipe section, the liquid catalyst is contained in the liquid storage section, and some of the discharge holes formed in the introduction pipe section are on the liquid surface of the liquid catalyst. Exhaust gas is released inside the liquid catalyst and on the liquid surface of the liquid catalyst because it is exposed and the rest is submerged below the liquid surface, and the harmful components in the exhaust gas are removed by the contact action with the liquid catalyst. Or, the exhaust gas in this liquid storage part passes sequentially from the earliest muffler chamber to the muffler chamber at the rear through the communication hole, and the liquid catalyst and gas are separated during the passage to clean it. The exhaust gas thus discharged is discharged to the outside.

At this time, since the baffle plate against which the exhaust gas collides is disposed behind the communication hole, the liquid catalyst and the gas can be separated well.

[0009]

【Example】

 1 to 6 show an embodiment in which the present invention is applied to a muffler of an automobile, 1 is a muffler body, which is connected to an exhaust pipe 3 of an automobile 2.

In this case, the inside of the muffler body 1 is vertically divided by a partition wall 4a, and the upper portion is further partitioned by a partition wall 4b into left and right parts. The left and right parts are partitioned into four parts by a partition wall 4c, and between the partition walls 4c. A passage 5 is formed, and is further divided into two upper and lower parts by partition walls 4d, so that a total of sixteen silencing chambers R are formed by the partition walls 4 on the left and right, and the silencing of exhaust gas G is performed on the partition walls 4d. A communication hole 6 is formed so that the chamber R can be sequentially passed therethrough, and an exhaust tube portion 7 is formed in communication with the last silencer chamber R.

In this case, a baffle plate 8 located behind the communication hole 6 and against which the exhaust gas G collides is attached to the partition wall 4 d by a leg piece 9, and the baffle plate 8 has a bowl diameter larger than that of the communication hole 7. It is shaped like a tree and is attached with the bowl placed in reverse.

Further, the lower part of the muffler main body 1 partitioned by the partition wall 4a is formed in a liquid storage part 10, and the liquid storage part 10 is formed in a state of being connected to the most advanced silencing chamber R. In this case, A partition wall 4e is also formed between the passages between the sound chamber R and the liquid storage portion 10, a through hole 10a is formed in the partition wall 4e, and the liquid storage portion 10 is roughly partitioned by the partition plate 11 in a mutually communicating state. The liquid storage part 10 accommodates a liquid catalyst L capable of removing or reducing harmful components in the exhaust gas G, and the liquid storage part 9 is provided with an introduction pipe part 12 capable of introducing the exhaust gas G. A connection pipe portion 13 connected to the exhaust pipe 3 is connected to the portion 12, a drain hole 14 is formed in the lower portion of the liquid storage portion 10, and a liquid supply portion 15 is provided on the side portion.

Various kinds of liquid catalyst L are selected and used. For example, as a main component substance, a catalyst composed of a compound such as potassium carbonate, aluminum oxide, manganese dioxide, boric acid, nickel chloride is used. It is possible to use aluminum hydroxide, iron hydroxide-containing industrial waste liquid, magnesium hydroxide, slaked lime and urea.

Further, the introduction pipe portion 12 is provided with emission holes 16 for emitting the exhaust gas G at several positions on the side surface and the bottom surface. Part of the discharge hole 16 is exposed above the liquid surface of the liquid catalyst L, and the rest is located below the liquid surface.

Since this embodiment has the above-mentioned configuration, as shown in FIG. 3, the exhaust gas G discharged from the engine of the automobile is introduced into the introduction pipe portion 12 through the exhaust pipe 3, and the inside of the introduction pipe portion 12 is The exhaust gas G is discharged into the liquid storage portion 10 through the discharge hole 14, the liquid catalyst L is stored in the liquid storage portion 10, and a part of the discharge hole 14 formed in the introduction pipe portion 12 is The exhaust gas G is released inside the liquid catalyst L and on the liquid surface of the liquid catalyst L because the rest is located under the liquid surface while being exposed on the liquid surface of the liquid catalyst L. As a result, the harmful component in the exhaust gas G is removed or reduced by the contact action with the liquid catalyst L, and the exhaust gas G in the liquid storage section 10 is silenced at the highest level via the through hole 10a and the communication hole 6. After being introduced into the chamber R, the exhaust gas G collides with the baffle plate 8 and is deflected while passing through an upper communication hole. 5 and 6, the exhaust gas G also collides with the baffle plate 8 and is deflected, and the exhaust gas G passes through the passage 5 to the adjacent side. It flows into the next muffling chamber R through the communication hole 6, and after repeating this passage eight times, it flows from the muffling chamber R at the right end in FIG. The sound absorbing chambers R are sequentially passed through, and a total of sixteen sound absorbing chambers R are sequentially passed through, and are discharged from the exhaust pipe portion 7 to the outside.

Therefore, the harmful components in the exhaust gas G are removed or reduced by the contact action with the liquid catalyst L. At this time, especially the exhaust gas G is in the liquid catalyst L and the liquid surface of the liquid catalyst L. Since the exhaust gas G is released to the upper side, even if the liquid catalyst L freezes in a cold region or the like, the exhaust gas G is released onto the liquid surface of the liquid catalyst L. It is melted by the heat of the exhaust gas G, and good emission can be maintained.

Furthermore, when the exhaust gas G sequentially passes through the muffling chamber R, the muffler's original pressure reducing action and muffling action are performed, and the liquid catalyst L and gas are separated, and in this case, the baffle plate 8 is present. As a result, this separating action is performed well, and only the cleaned exhaust gas G is discharged to the outside.

The present invention is not limited to the above-described embodiment, but can be applied to an engine muffler such as a construction machine or a boiler. For example, the structure of the muffler body, the structure and quantity of the muffler chamber, etc. , Are designed with appropriate modifications.

[0019]

[Effect of the device]

 According to the present invention, as described above, harmful components in exhaust gas discharged from an engine are removed or reduced by a contact action with a liquid catalyst, and harmful solid components such as malodorous components and soot can be removed or reduced, and thus clean. Only the exhaust gas is released into the atmosphere, which can significantly reduce the air pollution pollution caused by the exhaust gas, and has a very simple modification to the muffler that is incidental to the engine itself, not directly related to its structure. Since it can be implemented by means, it can be installed in existing vehicles, vehicles such as construction machinery, boilers, etc. very easily and at low cost, and it has an excellent immediate effect as a pollution control measure. Even if the liquid catalyst freezes in cold regions, etc., exhaust gas is released onto the liquid surface of the liquid catalyst because it is released onto the liquid surface of the catalyst. Since, will be melted by the heat of the exhaust gas, it is possible to maintain good release.

The initial purpose described above can be sufficiently achieved.

[Brief description of drawings]

FIG. 1 is an overall side view showing a usage state of an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of an embodiment of the present invention.

FIG. 3 is an overall vertical sectional view of an embodiment of the present invention.

FIG. 4 is a cross-sectional view of an embodiment of the present invention.

FIG. 5 is a partial perspective view of an embodiment of the present invention.

FIG. 6 is a partial side view of an embodiment of the present invention.

[Explanation of symbols]

 1 Muffler main body 4 Partition wall 6 Communication hole 8 Baffle plate 10 Liquid storage part 12 Introducing pipe part 16 Discharge hole R Silencer chamber G Exhaust gas L Liquid catalyst

Claims (2)

[Scope of utility model registration request] 1. A muffler body has a plurality of muffling chambers defined by partition walls, and communication holes are formed in the muffler body so that exhaust gases can sequentially pass through the muffler body. A liquid storage section connected to the muffler chamber at a lower position, a liquid catalyst capable of removing or reducing harmful components in exhaust gas is contained in the liquid storage section, and an introduction pipe section capable of introducing exhaust gas is provided. A plurality of discharge holes for discharging exhaust gas into the liquid storage section are provided in the introduction pipe section, and a part of the plurality of discharge holes is exposed on the liquid surface of the liquid catalyst. Along with the rest, the muffler for the engine is characterized by being located under the liquid surface. 2. The muffler for an engine according to claim 1, wherein a baffle plate against which exhaust gas collides is disposed behind the communication hole.