JP2005009392A - Exhaust pipe device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust pipe device capable of providing high silencing effect by a silencer and coping with a large displacement engine or output increase. <P>SOLUTION: In the exhaust pipe device 10 having the silencer 13 provided with an exhaust gas passage 23 formed by double-walled pipe composed of a main exhaust pipe 21 of a larger diameter and a sub exhaust pipe 22 of a small diameter therein and provided with an open-close device 30 varying passage area of the exhaust gas passage 23, the open-close device 30 can fully open the main exhaust pipe 21 and the sub exhaust pipe 22. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automobile exhaust pipe device.
[0002]
[Prior art]
As an exhaust pipe device for adjusting the exhaust noise of an automobile, an exhaust passage formed by a double pipe composed of a large-diameter main exhaust pipe and a small-diameter sub-exhaust pipe is provided in the silencer as described in Patent Document 1. Some have an opening / closing device that makes the passage area of the exhaust passage variable. In the exhaust pipe device of Patent Document 1, an opening / closing device is provided in a main exhaust pipe having a large diameter. The opening / closing device includes a lid member that covers the exhaust passage of the main exhaust pipe, and a variable plate that is disposed so as to overlap the lid member. The variable plate and the lid are rotated by rotating the variable plate with respect to the lid member. The overlapping area of the through holes provided in each of the members is changed to make the exhaust passage area of the main exhaust pipe variable.
[0003]
According to the switchgear of Patent Literature 1, the main exhaust pipe can be fully closed, and a high silencing effect can be obtained by the silencer.
[0004]
[Patent Document 1]
JP 2002-168111 (FIGS. 1-5, page 1)
[0005]
[Problems to be solved by the invention]
In the opening / closing device of the exhaust pipe device of Patent Document 1, the exhaust passage of the main exhaust pipe is covered with a cover member, and even if the exhaust passage area of the main exhaust pipe is changed by the rotation of the variable plate, the exhaust passage area of the main exhaust pipe is changed. Cannot exceed the maximum overlap area of the through holes of the variable plate and the lid member, and the main exhaust pipe cannot be fully opened. Therefore, it is difficult to secure a large exhaust flow rate required for a large displacement engine, and it is difficult to improve engine output by improving exhaust efficiency.
[0006]
An object of the present invention is to provide an exhaust pipe device that can obtain a high silencing effect by a silencer and can also cope with a large engine displacement and output improvement.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided an opening / closing device for providing an exhaust passage formed by a double pipe comprising a large-diameter main exhaust pipe and a small-diameter sub-exhaust pipe in the silencer and making the passage area of the exhaust passage variable. In the exhaust pipe device provided, the opening / closing device is configured to allow the main exhaust pipe and the sub exhaust pipe to be fully opened.
[0008]
According to a second aspect of the present invention, in the first aspect of the present invention, the opening / closing device is supported on the outer peripheral side of the main exhaust pipe and is capable of rotating around the tube axis of the main exhaust pipe, and the main exhaust pipe. A plurality of valve plates that are supported at a plurality of positions in the circumferential direction on the outer peripheral side and can be moved back and forth from the outside of the main exhaust pipe into the pipe, and provided on the drive plate and the valve plate provided on the link plate by the rotation of the link plate The valve plate is moved forward and backward through the engagement of the driven portion, the entire valve plate at the retracted end is set outside the main exhaust pipe, and the main exhaust pipe is fully closed by the entire valve plate at the advanced end. The auxiliary exhaust pipe is wrapped by the front edge of all the valve plates.
[0009]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the switchgear is arranged on the outer peripheral side of the main exhaust pipe at the downstream end of the exhaust flow in the silencer.
[0010]
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the opening / closing device is remotely controlled by vehicle operation information.
[0011]
[Action]
The invention according to claim 1 has the following effect (1).
(1) The opening / closing device of the exhaust pipe device fully opens the main exhaust pipe and the sub exhaust pipe. Therefore, a large exhaust flow rate required for a large displacement engine can be ensured, exhaust efficiency can be improved, and engine output can be improved.
[0012]
In addition, by fully closing the main exhaust pipe, it is possible to obtain a high silencing effect by the silencer, and to enhance the silencing effect while ensuring a necessary and sufficient exhaust passage during normal driving (at low exhaust gas flow rate). be able to. Further, when traveling with a high output required, the main exhaust pipe is opened and exhausted from the main / sub exhaust pipe, so that it is possible to cope with high flow exhaust gas.
[0013]
The invention according to claim 2 has the following effect (2).
The switchgear has a link plate and a valve plate. By positioning all the valve plates at the retracted end and setting them outside the main exhaust pipe, the main exhaust pipe and the sub exhaust pipe can be fully opened. The main exhaust pipe can be fully closed by positioning the plate at the forward end.
[0014]
The invention according to claim 3 has the following effect (3).
(3) By disposing the switchgear on the outer peripheral side of the main exhaust pipe at the downstream end of the exhaust flow in the silencer, the switchgear can be easily assembled and removed around the outer periphery of the main exhaust pipe. Therefore, the assembly and maintenance of the switchgear can be improved.
[0015]
The invention according to claim 4 has the following effect (4).
(4) The switchgear is remotely controlled by vehicle operation information. Accordingly, it is possible to obtain exhaust characteristics and noise reduction characteristics according to the vehicle traveling condition during vehicle traveling. In addition, it is remotely operated and there is no possibility of causing burns or the like to the user.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
1 is a schematic view showing an exhaust pipe device, FIG. 2 is a cross-sectional view showing the exhaust pipe device, FIG. 3 is a front view showing the exhaust pipe device, FIG. 4 is a front view showing a fully opened state of the switchgear, and FIG. FIG. 6 is a sectional view of the switchgear, FIG. 7 is a perspective view of the switchgear, FIG. 8 is an exploded view of the proximal end side of the exhaust pipe device, and FIG. 9 is an intermediate view of the exhaust pipe device. FIG. 10 is an exploded view of the front end side of the exhaust pipe device.
[0017]
As shown in FIG. 1, the automobile exhaust pipe device 10 is configured by providing a silencer 13 and a tail pipe 14 on an exhaust pipe 12 connected to an engine 11.
[0018]
As shown in FIGS. 2 and 3, the exhaust pipe device 10 includes an exhaust passage formed by a double pipe including a large-diameter straight porous main exhaust pipe 21 and a small-diameter straight sub-exhaust pipe 22 inside the silencer 13. 23 is provided.
[0019]
The silencer 13 includes an outer cylinder 13A that accommodates a sound absorbing material 15 such as glass wool between the main exhaust pipe 21, and one end of the outer cylinder 13A is closed by an outer wall 13B, and an outer plate is provided at the other end of the outer cylinder 13A. 13C is provided and configured. A gasket 16 is interposed between the other end of the outer cylinder 13A and the outer plate 13C.
[0020]
The end of the exhaust pipe 12 is inserted into the silencer 13 and includes an adapter 12A. The adapter 12A is sealed with an outer wall 13B and connected to the main exhaust pipe 21. The main exhaust pipe 21 extends inside the silencer 13. The tail pipe 14 is connected to the outer plate 13C.
[0021]
The outer end of the support plate 17 is fixed at three positions on the inner circumference of the tail pipe 14, and the auxiliary exhaust pipe 22 is supported by the inner ends of the three support plates 17. The sub exhaust pipe 22 extends from the position corresponding to the middle portion of the main exhaust pipe 21 inside the silencer 13 to the inside of the tail pipe 14 and is coaxially disposed on the main exhaust pipe 21.
[0022]
Inside the outer plate 13 </ b> C side of the silencer 13, an inner plate 18 is fixed between the inner periphery of the outer cylinder 13 </ b> A and the outer periphery of the main exhaust pipe 21. The silencer 13 has a silencer chamber 13D in which the sound absorbing material 15 is accommodated between the outer wall 13B and the inner plate 18, and an opening / closing device 30 is provided between the outer plate 13C and the inner plate 18. The switchgear 30 is arranged on the outer peripheral side of the main exhaust pipe 21 at the downstream end of the exhaust flow in the silencer 13.
[0023]
The opening / closing device 30 opens and closes between an open position (FIG. 4) where the main exhaust pipe 21 and the sub exhaust pipe 22 are fully opened and a closed position (FIG. 5) where the main exhaust pipe 21 is fully closed. The passage area of the passage 23 is made variable.
[0024]
The opening / closing device 30 includes an electric motor 31, a base plate 32, an operation rod 33, a pinion 34, a sleeve 35, a ring gear 36, a link plate 37, a valve plate 38, and an end plate 39, as shown in FIGS. It is configured as follows.
[0025]
The electric motor 31 is fixed to the mount plate 41 with screws 42. The mount plate 41 of the electric motor 31 is attached to the outer wall 13B by fastening a mounting screw 44 to which the mount collar 43 is attached to a nut 45 welded to the outer wall 13B of the silencer 13.
[0026]
The base plate 32 is fixed to the inner plate 18 with bolts 46 and nuts 46A.
[0027]
The operating rod 33 is connected to the output shaft of the electric motor 31 via a coupling 47, and is fitted to the outer wall 13B of the silencer 13, the bearings 48A and 48B fitted and fixed to the inner plate 18 and the base plate 32. Both ends are supported and extend into the silencer chamber 13D of the silencer 13. The operation rod 33 is inserted into the silencer chamber 13D through a pipe 49 coupled to both ends of the bearing 48A and the bearing 48B.
[0028]
The pinion 34 is fixed to the end of the operation rod 33 protruding from the bearing 48 </ b> B of the base plate 32.
[0029]
The sleeve 35 is welded with one end fitted into the center hole of the base plate 32 around the outer periphery of the main exhaust pipe 21 near the pipe end surface.
[0030]
The ring gear 36 and the link plate 37 are coaxially laminated, are integrally fixed by a countersunk screw 51, are rotatably inserted into the outer periphery of the sleeve 35, and are removed by a stopper ring 52 that is engaged with the outer peripheral groove at the other end of the sleeve 35. Stopped and supported.
[0031]
The ring gear 36 is thrust-supported in the axial direction on the step surface of the guide roller 54 pivotally attached to the pins 53 fixedly erected at a plurality of positions around the sleeve 35 in the base plate 32, and the small-diameter roller of the guide roller 54. It is sandwiched between the surface and the outer periphery of the sleeve 35 and is supported rotatably. A tooth surface 36A is provided on a part of the outer periphery of the ring gear 36, and the pinion 34 is engaged with the tooth surface 36A.
[0032]
The link plate 37 includes groove-shaped drive portions 37A at a plurality of circumferential positions (four positions in the present embodiment). The drive portion 37A is composed of a curved guide groove that smoothly increases or decreases the radial distance in the circumferential direction, in other words, the rotation direction around the tube axis of the main exhaust pipe 21, in which the link plate 37 rotates integrally with the ring gear 36. The drive unit 37A may be a straight guide groove.
[0033]
The valve plate 38 includes a plurality (four in this embodiment) corresponding to the number of grooves of the link plate 37, and the valve bush 56 fitted and fixed to the base end portion of each valve plate 38 is arranged in the circumferential direction of the base plate 32. A nut 58A is screwed to a base end thread portion inserted through a plurality of positions (four positions in the present embodiment) and is supported by a support shaft 57A of a valve shaft 57 that is fixedly erected. The valve plate 38 is spaced apart from the link plate 37 and is rotatably supported. A pin-like driven portion 38A that is fixedly projected at an intermediate portion that is spaced apart from the valve bush 56 of the valve plate 38 in the radial direction of rotation is engaged in the guide groove of the drive portion 37A of the link plate 37. The tip of the valve plate 38 is disposed at a position facing the side of the pipe end face of the main exhaust pipe 21 from the axially outer side of the free end face of the sleeve 35. Therefore, by rotation of the link plate 37, the tip of the valve plate 38 advances and retreats from the outside of the main exhaust pipe 21 into the pipe with the valve shaft 57 as a rotation fulcrum through the engagement of the driving portion 37A and the driven portion 38A. Become a thing. All the valve plates 38 at the retracted end are set outside the main exhaust pipe 21 as shown in FIG. As shown in FIG. 5, all the valve plates 38 at the forward end fully close the main exhaust pipe 21, and the front edge portions 38 </ b> B on the tip side of all the valve plates 38 are mutually connected to the outer diameter of the sub exhaust pipe 22. A circular shape having the same diameter is formed, and the outer periphery of the sub exhaust pipe 22 is wrapped without a gap.
[0034]
The end plate 39 is attached around the tip screw portion of the above-described valve shaft 57 erected on the base plate 32 from the valve bush 56 provided on the valve plate 38, and the step of the support shaft 57A. Supported by the surface. An outer plate 13C of the silencer 13 is inserted into a tip thread portion of the valve shaft 57 protruding from the end plate 39, and the outer plate 13C is fixed to a step surface of the support shaft 57A of the valve shaft 57 together with the end plate 39 by a nut 58B. It becomes.
[0035]
The electric motor 31 of the opening / closing device 30 is fixedly disposed near the outer wall 13 </ b> B of the silencer 13 and is driven by the controller 61. The controller 61 is connected to the ECU 62 of the vehicle. The controller 61 takes in various operation information (engine speed, slot valve opening, supercharging pressure, vehicle speed, etc.) of the vehicle such as the engine 11 through the ECU 62 and drives and controls the electric motor 31.
[0036]
Accordingly, the opening / closing device 30 opens and closes as follows.
(Closing operation-exhausting only by the auxiliary exhaust pipe 22)
When the operation rod 33 is rotated by normal rotation of the electric motor 31, the pinion 34 provided at the end of the operation rod 33 is also rotated. Along with the rotation of the pinion 34, the ring gear 36 that meshes with the pinion 34 also rotates. As the ring gear 36 and the link plate 37 rotate, the position of the drive portion 37A of the link plate 37 also changes. At this time, the valve plate 38 is pivotally supported by the valve shaft 57, and the driven portion 38 </ b> A is moved to the inside of the link plate 37 along the drive portion 37 </ b> A that is displaced by the rotation of the link plate 37. The front edge portion 38B advances into the main exhaust pipe 21, and the main exhaust pipe 21 is fully closed at the forward end thereof, so that an exhaust outlet corresponding to the pipe diameter of the sub exhaust pipe 22 is formed (FIG. 5). .
[0037]
(Opening operation-exhaust by main exhaust pipe 21 and sub exhaust pipe 22)
When the operation rod 33 is rotated by the reverse rotation of the electric motor 31, the pinion 34 provided at the end of the operation rod 33 is also rotated. As the pinion 34 rotates, the ring gear 36 that meshes with the pinion 34 also rotates. As the ring gear 36 and the link plate 37 rotate, the position of the drive portion 37A of the link plate 37 also changes. At this time, the valve plate 38 is pivotally supported by the valve shaft 57, and the driven portion 38 </ b> A is moved to the outside of the link plate 37 along the drive portion 37 </ b> A that is displaced by the rotation of the link plate 37. The front edge 38B of the main exhaust pipe 21 is retracted out of the main exhaust pipe 21, and the main exhaust pipe 21 is fully opened at the retracted end (FIG. 4).
[0038]
According to this embodiment, there exist the following effects.
(1) The opening / closing device 30 of the exhaust pipe device 10 fully opens the main exhaust pipe 21 and the sub exhaust pipe 22. Therefore, a large exhaust flow rate required for a large displacement engine can be ensured, exhaust efficiency can be improved, and engine output can be improved.
[0039]
In addition, by fully closing the main exhaust pipe 21, it is possible to obtain a high noise reduction effect by the silencer 13, and the noise reduction effect while ensuring a necessary and sufficient exhaust passage during normal driving (at low exhaust gas flow rate). Can be increased. Further, when traveling where high output is required, the main exhaust pipe 21 is opened and exhausted from the main / sub exhaust pipes 21 and 22 so as to cope with high flow exhaust gas.
[0040]
The switchgear 30 has a link plate 37 and a valve plate 38, and the main exhaust pipe 21 and the sub exhaust pipe 22 are completely connected by positioning all the valve plates 38 at the retracted end and setting them outside the main exhaust pipe 21. The main exhaust pipe 21 can be fully closed by positioning the full valve plate 38 at the forward end.
[0041]
(3) By installing the switchgear 30 on the outer peripheral side of the main exhaust pipe 21 at the downstream end of the exhaust flow in the silencer 13, the switchgear 30 can be easily assembled and removed around the outer periphery of the main exhaust pipe 21. . Therefore, the assembling property and maintainability of the opening / closing device 30 can be improved.
[0042]
(4) The opening / closing device 30 is remotely controlled by vehicle operation information. Accordingly, it is possible to obtain exhaust characteristics and noise reduction characteristics according to the vehicle traveling condition during vehicle traveling. In addition, it is remotely operated and there is no possibility of causing burns or the like to the user.
[0043]
Although the embodiment of the present invention has been described with reference to the drawings, the specific configuration of the present invention is not limited to this embodiment, and there are design changes and the like without departing from the scope of the present invention. Are also included in the present invention. For example, the opening / closing device for the exhaust pipe device of the present invention may be remotely operated by the user.
[0044]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, while being able to obtain the high noise reduction effect by a silencer, the exhaust pipe apparatus which can respond also to the large engine displacement and output improvement of an engine can be obtained.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an exhaust pipe device.
FIG. 2 is a cross-sectional view showing an exhaust pipe device.
FIG. 3 is a front view showing an exhaust pipe device.
FIG. 4 is a front view showing a fully opened state of the switchgear.
FIG. 5 is a front view showing a fully closed state of the switchgear.
FIG. 6 is a cross-sectional view of the switchgear.
FIG. 7 is a perspective view of an opening / closing device.
FIG. 8 is an exploded view of the proximal end side of the exhaust pipe device.
FIG. 9 is an exploded view of an intermediate portion of the exhaust pipe device.
FIG. 10 is an exploded view of the distal end side of the exhaust pipe device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Exhaust pipe device 13 Silencer 21 Main exhaust pipe 22 Sub exhaust pipe 23 Exhaust passage 30 Opening / closing device 37 Link plate 37A Drive part 38 Valve plate 38A Follower part

Claims (4)

In an exhaust pipe device having an exhaust passage formed by a double pipe composed of a large-diameter main exhaust pipe and a small-diameter sub-exhaust pipe inside the silencer and having an opening / closing device that makes the passage area of the exhaust passage variable ,
An exhaust pipe device characterized in that the switchgear allows the main exhaust pipe and the sub exhaust pipe to be fully opened. The switchgear is
A link plate supported on the outer peripheral side of the main exhaust pipe and capable of rotating around the pipe axis of the main exhaust pipe;
Having a plurality of valve plates supported at a plurality of positions in the circumferential direction on the outer peripheral side of the main exhaust pipe and capable of moving back and forth from the outside of the main exhaust pipe into the pipe;
By rotating the link plate, the valve plate is advanced and retracted through the engagement of the drive part provided on the link plate and the driven part provided on the valve plate, and all the valve plates at the backward end are moved out of the main exhaust pipe. 2. The exhaust pipe device according to claim 1, wherein the main exhaust pipe is fully closed by all the valve plates at the forward end and the auxiliary exhaust pipe is wrapped by the front edge portion of all the valve plates. The exhaust pipe device according to claim 1 or 2, wherein the switchgear is arranged on the outer peripheral side of the main exhaust pipe at the downstream end of the exhaust flow in the silencer. The exhaust pipe device according to any one of claims 1 to 3, wherein the opening / closing device is remotely controlled by vehicle operation information.

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