JP3470798B2 - Filter connection muffler - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter connecting muffler provided in an exhaust pipe of a vehicle engine. More specifically, the present invention relates to a filter connection muffler in which a filter is directly connected to a muffler. 2. Description of the Related Art As shown in FIG . 2A, a muffler 1 provided in an exhaust pipe of an engine includes a cylindrical muffler main body 3.
Are known in which both ends are sealed by end plates 2, respectively. The muffler 1 divides an exhaust pipe 4 piped under the floor of the vehicle and is provided in the middle of the exhaust pipe 4. The ends of the upstream and downstream exhaust pipes 4 divided by the respective end plates 2 are connected. Is done. The inside of the muffler main body 3 is partitioned into a plurality of small chambers by a plurality of partition plates (not shown), and a pipe 5 is provided to penetrate these partitioned small chambers in series. Although not shown, a large number of small holes are formed in the pipe 5 so that the exhaust gas passing through the inside of the pipe 5 can expand through the small holes. The upstream edge of the pipe 5 is connected to the separated upstream exhaust pipe 4, and the pipe 5
Is connected to a split downstream exhaust pipe (not shown). The muffler 1 is configured such that high-pressure exhaust gas discharged from the engine passes through the pipe 5 from the upstream exhaust pipe and expands in each of the small chambers, so that the pressure is reduced and the sound is muffled. [0003] On the other hand, the exhaust gas of an engine contains soot, particulates such as hydrocarbons, sulfates, metals and the like adhering to the soot. In a diesel engine in which the particulates are generated in a relatively large amount, a filter device 6 is provided in the exhaust pipe 4 to prevent the particulates from being collected and released to the atmosphere. The conventional filter device 6 is made independently of the muffler 1 and includes a particulate filter 7 for actually collecting the particulates, a housing tube 8 for housing the particulate filter 7, and both ends of the housing tube. And a lid 9 provided in each of the sections. This filter device 6 is further divided into the upstream exhaust pipe 4 divided for mounting the muffler 1, and is provided in the middle of the upstream exhaust pipe 4. The edges are connected. In the filter device 6, high-pressure exhaust gas discharged from the engine flows into the housing pipe 8 from the upstream lid 9, passes through the particulate filter 7, and flows from the downstream lid 9 toward the muffler 1. It is configured to be discharged, and the particulates in the exhaust gas are collected by the particulate filter 7 when passing through the filter. [0004] However, with the recent high performance of vehicles, the mounting density of the underfloor space of vehicles has increased,
It is becoming difficult to provide the muffler 1 and the filter device 6 separately and independently. In order to solve this point, FIG.
As shown in (b) , the filter device 6 conventionally required.
Although it is conceivable to eliminate the exhaust pipe 4 between the muffler 1 and improve the mounting density, it is possible to shorten the length sufficiently by simply mounting the filter device 6 directly on the upstream side of the muffler 1. However, there is a problem that the space for accommodating the filter connection muffler cannot be sufficiently reduced. SUMMARY OF THE INVENTION An object of the present invention is to provide a filter connecting muffler capable of minimizing the accommodation space by shortening the overall length as much as possible. [0005] The invention according to claim 1 is:
As shown in FIG. 1, the present invention is an improvement of a filter connecting muffler in which a filter device 13 is connected to an upstream side of a muffler 12 having a cylindrical muffler main body 12a and end plates 12b provided at both ends of the muffler main body 12a. The characteristic configuration is that the filter device 13 is a particulate filter 14.
Has a storage tube 16 in which the storage tube 16 is stored, and a downstream end of the storage tube 16.
A radial or annular flange member 21 is provided around the outside.
And the upstream end plate 12 b facing the downstream edge of the housing tube 16.
An annular mounted member 22 is provided on the
The filter device 13 is connected to the muffler 12 by screwing the filter device 13 to the attached member 22 and bringing the downstream end of the housing tube 16 into close contact with the end plate 12 b on the upstream side of the muffler 12. In the invention according to claim 1, the housing pipe 1
6 is directly adhered to the upstream side of the muffler 12, so that the length corresponding to the downstream lid in the filter device required conventionally, specifically, the conventional example is shown in FIG.
The total length can be shortened by the length of the portion C in (b) . In the invention according to the first aspect , the flange member provided around the outer periphery of the downstream end of the housing pipe 16 is provided.
21 is attached to the attached member 2 provided on the upstream side of the end plate 12b.
2 , the muffler 12 and the filter device 13 can be easily separated by removing the male screw 23. In the separated state, the downstream end of the housing tube 16 is opened. Therefore, the particulate filter 1
4 can be easily taken out from the storage tube 16 and the work of replacing the particulate filter 14 can be easily performed. Next, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a filter connecting muffler 10 of the present invention is provided in an exhaust pipe 11 of an engine of a vehicle (not shown).
3 is connected to the upstream side of the muffler 12. The muffler 12 includes a cylindrical muffler main body 12a and end plates 12b provided at both ends of the muffler main body 12a.
(Only the upstream end plate is shown in the figure). Although not shown, the inside of the muffler main body 12a is partitioned into a plurality of small chambers by a plurality of partition plates (not shown), and a pipe 12c is provided through the partitioned small chambers in series. A large number of small holes (not shown) are formed in the pipe 12c, and the exhaust gas passing through the inside of the pipe 12c expands through the small holes, so that the exhaust gas is decompressed and silenced. The filter device 13 includes a particulate filter 14 for actually collecting particulates, and a housing pipe 16 for containing the particulate filter 14.
And a lid 17 provided at the upstream end of the storage tube 16.
And The particulate filter 14 is a cylindrical porous ceramic sintered body, and the housing tube 16 is formed in a cylindrical shape having an inner diameter corresponding to the outer diameter of the particulate filter 14. Particulate filter 14
Donut-shaped pressing plates 18, 18 for pressing around the edge of the particulate filter 14 are respectively inserted into both ends of the housing pipe 16 storing the pressing members 18, 1.
Flanges 18a, 18a are formed on the outer periphery of the housing tube 8 so as to face each other and to contact the inner surface of the housing tube 16 with the outer surface. The holding plate 18 on the upstream side of the filter is held down by a lid 17 welded to the upstream end of the housing tube 16. On the other hand, the downstream end of the housing pipe 16 is
Is directly adhered to the upstream side of the end plate 12b. As described above, the filter device 13 is coupled to the muffler 12 by bringing the downstream end of the housing pipe 16 into direct contact with the end plate 12b of the muffler 12. More specifically, an annular flange member 21 is provided around the outer periphery of the downstream end of the housing pipe 16 by welding. On the other hand, an attached member 22 is provided on the end plate 12b on the upstream side of the muffler 12 facing the flange member 21. The attached member 22 is formed in an annular shape facing the downstream edge of the housing tube 16, and the attached member 22 is integrally formed with an annular ridge 22 a whose outer surface is in contact with the inner surface of the downstream end of the housing tube 16. It is formed. A plurality of mounting holes 21a are formed in the flange member 21 toward the end plate 12b.
A female screw 22b is formed in the attached member 22 corresponding to a. By inserting the male screw 23 into the mounting hole 21 a of the flange member 21 and screwing it into the female screw 22 b of the mounted member 22, the flange member 21 can be screwed to the mounted member 22. By screwing to the mounted member 22, the downstream edge of the housing tube 16 is directly adhered to the upstream side of the end plate 12b. At the same time, the tip of the ridge 22a of the flange member 21 is
, The pressing plate 18 on the downstream side of the filter is pressed by the ridges 22a, and the particulate filter 14 is brought into contact with the pair of pressing plates 18, 18.
And is fixed inside the storage tube 16. The filter connecting muffler 10 is provided in the middle of the divided exhaust pipe 11, and the end of the separated upstream exhaust pipe 11 is connected to the upstream lid 17 of the filter device 13. An end of the exhaust pipe on the downstream side is connected to a downstream end plate (not shown) of the muffler 12. In the filter connection muffler 10, the high-pressure exhaust gas discharged from the engine is transferred to the upstream lid 17 in the filter device 13.
Flows into the inside of the housing pipe 16 and collects particulates in the exhaust gas when passing through the particulate filter 14. The exhaust gas that has passed through the particulate filter 14 immediately enters the pipe 12c of the muffler 12, and expands in each of the small chambers formed in the muffler 12, so that the exhaust gas is decompressed and silenced. In the filter connecting muffler 10 constructed as described above, the downstream end of the housing tube 16 is brought into close contact with the upstream side of the end plate 12b. The entire length can be shortened by a corresponding length, specifically, the length at the portion C in FIG. 2B showing a conventional example .
The space under the floor of the vehicle accommodating 0 can be sufficiently reduced as compared with the related art. Further, a flange member 21 provided around the outer periphery of the downstream end of the housing tube 16 is screwed to a mounting member 22 provided on the upstream side of the end plate 12b so that the downstream edge of the housing tube 16 is provided. Directly adhered to the upstream side of the end plate 12b,
By removing the male screw 23, the muffler 12 and the filter device 13 can be easily separated. In the separated state, the downstream end of the storage tube 16 is opened. Can be easily taken out from the apparatus, and the work of replacing the particulate filter 14 itself becomes easy. In the above embodiment, the housing tube 1
Although the annular flange member 21 is provided around the outer periphery of the downstream end of the housing 6 by welding, a plurality of flange members may be radially provided around the outer periphery of the downstream end of the housing pipe 16 . As described above, according to the present invention, the downstream end of the housing pipe is directly adhered to the upstream side of the muffler, so that the downstream side of the conventionally required filter device is used. The overall length can be reduced by a length corresponding to the lid. Also, if the flange member provided around the downstream end of the housing pipe is screwed to the attached member provided on the end plate ,
By removing the male screw, the muffler and the filter device can be easily separated, and the work of replacing the particulate filter can be easily performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a filter connecting muffler of the present invention. 2 (a) mounting the form of a conventional muffler and filter device
Longitudinal sectional view showing the state. (B) A longitudinal sectional view showing a conventional filter connection muffler. [Description of Signs] 10 Filter connecting muffler 12 Muffler 12b End plate 13 Filter device 14 Particulate filter 16 Housing tube 21 Flange member 22 Member to be attached

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F01N 3/02 B01D 46/10

Claims (1)

(57) Claims 1. An upstream side of a muffler (12) having a cylindrical muffler body (12a) and end plates (12b) provided at both ends of the muffler body (12a). A filter connection muffler (10) in which a filter device (13) is connected to the filter device (13), wherein the filter device (13) is a particulate filter (14).
Has a storage tube (16) in which a radial or annular shape is provided around the outer periphery of the downstream end of the storage tube (16).
A flange member (21) is provided, and an upstream end plate (12b) facing a downstream edge of the housing pipe (16).
Is provided with an annular mounted member (22), and the flange member (21) is screwed to the mounted member (22).
The filter device (13) was connected to the muffler (12) by directly adhering the downstream edge of the storage tube (16) to the end plate (12b) on the upstream side of the muffler (12). A filter connection muffler, characterized in that: