U.S. patent application number 13/619044 was filed with the patent office on 2013-08-29 for muffler with dual exhaust gas discharge pipe for vehicle.
This patent application is currently assigned to HYUNDAI MOTOR COMPANY. The applicant listed for this patent is Ki Chul PARK. Invention is credited to Ki Chul PARK.
Application Number | 20130220732 13/619044 |
Document ID | / |
Family ID | 48950718 |
Filed Date | 2013-08-29 |
United States Patent
Application |
20130220732 |
Kind Code |
A1 |
PARK; Ki Chul |
August 29, 2013 |
MUFFLER WITH DUAL EXHAUST GAS DISCHARGE PIPE FOR VEHICLE
Abstract
A muffler apparatus for a vehicle may include a muffler housing
that has first and fourth chambers formed at front and rear
portions therein and second and third chambers formed between the
first and fourth chambers in sequence, an exhaust gas intake pipe
that may be inserted in the muffler housing through the front
portion of the muffler housing, with an end portion thereof being
disposed in the third chamber, and exhaust gas discharge pipes that
may be connected with the second chamber and discharge an exhaust
gas to the outside of the muffler housing.
Inventors: |
PARK; Ki Chul; (Suwon-si,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PARK; Ki Chul |
Suwon-si |
|
KR |
|
|
Assignee: |
HYUNDAI MOTOR COMPANY
Seoul
KR
|
Family ID: |
48950718 |
Appl. No.: |
13/619044 |
Filed: |
September 14, 2012 |
Current U.S.
Class: |
181/257 ;
181/268 |
Current CPC
Class: |
F01N 2470/14 20130101;
F01N 2340/00 20130101; F01N 2470/18 20130101; F01N 2490/08
20130101; F01N 1/084 20130101; F01N 1/083 20130101; F01N 2310/02
20130101; F01N 1/10 20130101 |
Class at
Publication: |
181/257 ;
181/268 |
International
Class: |
F01N 1/10 20060101
F01N001/10; F01N 1/24 20060101 F01N001/24 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 29, 2012 |
KR |
10-2012-0021077 |
Claims
1. (canceled)
2. The muffler apparatus of claim 8, further including acoustic
absorbents that are filled in the first and fourth chambers, reduce
exhaust noise, and absorb high-temperature heat of an exhaust
gas.
3. (canceled)
4. The muffler apparatus of claim 8, wherein a plurality of holes
connected with the second chamber to implement sporty sound quality
due to an exhaust gas are formed at a portion of the exhaust gas
intake pipe, which is positioned in the second chamber.
5. The muffler apparatus of claim 2, wherein the acoustic
absorbents are made of glass wool.
6. The muffler apparatus of claim 2, wherein the area of the first
and fourth chambers filled with the acoustic absorbents is 40% to
80% of the entire area of the muffler housing.
7. The muffler apparatus of claim 8, wherein the exhaust gas
discharge pipes are implemented with a dual pipe.
8. A muffler apparatus for a vehicle, comprising: a muffler housing
that has first and fourth chambers formed at front and rear
portions therein and second and third chambers formed between the
first and fourth chambers in sequence; an exhaust gas intake pipe
that is inserted in the muffler housing through the front portion
of the muffler housing, with an end portion thereof being disposed
in the third chamber; and exhaust gas discharge pipes that are
connected with the second chamber and discharge an exhaust gas to
the outside of the muffler housing; wherein first, second, and
third baffles that divide the inside of the muffler housing into
the first, second, third, and fourth chambers are fixed at
predetermined distances in the front-rear direction in the muffler
housing; wherein a plurality of air-through holes are formed
through the first, second, and third baffles, respectively; and
wherein the air-through holes are uniformly disposed throughout the
second baffle so that the exhaust gas in the third chamber is
uniformly distributed and flows into the second chamber when
flowing into the second chamber through the air-through holes of
the second baffle and the exhaust gas flowing in the second chamber
is uniformly divided into the exhaust gas discharge pipes and
discharged outside.
9. The muffler apparatus of claim 8, wherein the volume of the
third chamber is smaller than the volume of each of the second
chamber and the fourth chamber.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] The present application claims priority to Korean Patent
Application No. 10-2012-0021077, filed Feb. 29, 2012, the entire
contents of which is incorporated herein for all purposes by this
reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present disclosure relates to a muffler with a dual
exhaust gas discharge pipe for a vehicle. More particularly, it
relates to a muffler with a dual exhaust gas discharge pipe for a
vehicle which makes it possible to increase the length of exhaust
gas discharge pipes by disposing the exhaust gas discharge pipes at
the front portion a muffler housing and to greatly reduce the
surface area occupied by a hot section of the muffler housing.
[0004] 2. Description of Related Art
[0005] A muffler of the related art, as shown in FIGS. 1 and 2, has
a structure in which first, second, and third baffles 2, 3, 4 are
fixed longitudinally in a muffler housing 1, the inside of the
muffler housing 1 is divided into first, second, third, and fourth
chambers 5, 6, 7, 8 by the first, second, and third baffles 2, 3,
4, and a plurality of air-through holes 2a, 3a, 4a are formed
through the first, second, and third baffles 2, 3, 4 to connect
adjacent chambers.
[0006] Further, an exhaust gas intake pipe 9 is disposed with the
outlet end positioned in the second chamber 6 through the first
chamber 5 and the first baffle 2 from the front of the muffler
housing 1 and exhaust gas discharge pipes 10 are connected with the
third chamber 7 and discharge an exhaust gas to the outside.
[0007] Further, the first chamber 5 and the fourth chamber 8 are
filled with acoustic absorbents 11, 12 and the acoustic absorbents
11, 12 reduce exhaust noise and air flow-induced noise and
particularly prevent heat transfer from the exhaust gas to the car
body by absorbing high-temperature heat generated from the exhaust
gas.
[0008] According to the structure of the muffler of the related
art, however, the exhaust gas flowing into the third chamber 7
directly flows outside through the exhaust gas discharge pipes 10
before the exhaust noise is sufficiently absorbed by the acoustic
absorbent 12 so that large air flow-induced noise of the exhaust
gas is generated and it is difficult to reduce high-frequency noise
of the exhaust gas with the acoustic absorbent 12 in the fourth
chamber 8.
[0009] Further, since the exhaust gas discharge pipes 10 are
connected to the third chamber 7 in the muffler of the related art,
there is a limit in increasing the length of the exhaust gas
discharge pipes 10 so that it is difficult to reduce booming noise
of the exhaust gas.
[0010] Further, the whole area of the first and fourth chambers 5,
8 filled with the acoustic absorbents 11, 12 is about 20% to 30% of
the entire area of the muffler housing 1, in the muffler of the
related art so that adiabatic performance is poor.
[0011] That is, the whole area of the second and third chambers 6,
7, which are not filled with the acoustic absorbents 11, 12 is
about 70% to 80% of the entire area of the muffler housing 1 and
the second and third chambers 6, 7 are hot sections that discharge
exhaust gas without absorbing the high-temperature heat, in the
muffler of the related art so that a large amount of heat transfers
to the car body (trunk room and rear bumper) adjacent to the
muffler, and accordingly, large damage is generated by the exhaust
gas.
[0012] The description provided above as a related art is just for
helping understanding the background of the present invention and
should not be construed as being included in the related art known
by those skilled in the art.
[0013] The information disclosed in this Background of the
Invention section is only for enhancement of understanding of the
general background of the invention and should not be taken as an
acknowledgement or any form of suggestion that this information
forms the prior art already known to a person skilled in the
art.
BRIEF SUMMARY
[0014] Various aspects of the present invention are directed to
providing a muffler with a dual exhaust gas discharge pipe for a
vehicle which makes it possible to reduce air flow-induced noise
and high-frequency noise of an exhaust gas without increasing back
pressure of the exhaust gas by connecting exhaust gas discharge
pipes with a second chamber, particularly to reduce booming noise
of an exhaust gas by increasing the length of the exhaust gas
discharge pipes, and further to considerably reduce damage to the
car body due to heat from an exhaust gas by largely decreasing the
surface area occupied by a hot section in the muffler.
[0015] In an aspect of the present invention, a muffler apparatus
for a vehicle, may include a muffler housing that may have first
and fourth chambers formed at front and rear portions therein and
second and third chambers formed between the first and fourth
chambers in sequence, an exhaust gas intake pipe that is inserted
in the muffler housing through the front portion of the muffler
housing, with an end portion thereof being disposed in the third
chamber, and exhaust gas discharge pipes that are connected with
the second chamber and discharge an exhaust gas to the outside of
the muffler housing.
[0016] The muffler apparatus may further include acoustic
absorbents that are filled in the first and fourth chambers, reduce
exhaust noise, and absorb high-temperature heat of an exhaust
gas.
[0017] First, second, and third baffles that divide the inside of
the muffler housing into the first, second, third, and fourth
chambers are fixed at predetermined distances in the front-rear
direction in the muffler housing, and a plurality of air-through
holes are formed through the first, second, and third baffles,
respectively.
[0018] A plurality of holes connected with the second chamber to
implement sporty sound quality due to an exhaust gas are formed at
a portion of the exhaust gas intake pipe, which is positioned in
the second chamber.
[0019] The acoustic absorbents are made of glass wool.
[0020] The area of the first and fourth chambers filled with the
acoustic absorbents is 40% to 80% of the entire area of the muffler
housing.
[0021] The exhaust gas discharge pipes are implemented with a dual
pipe.
[0022] The air-through holes are uniformly disposed throughout the
second baffle so that the exhaust gas in the third chamber is
uniformly distributed and flows into the second chamber when
flowing into the second chamber through the air-through holes of
the second baffle and the exhaust gas flowing in the second chamber
is uniformly divided into the exhaust gas discharge pipes and
discharged outside.
[0023] Volume of the third chamber is smaller than volume of each
of the second chamber and the fourth chamber.
[0024] It is understood that the term "vehicle" or "vehicular" or
other similar term as used herein is inclusive of motor vehicles in
general such as passenger automobiles including sports utility
vehicles (SUV), buses, trucks, various commercial vehicles,
watercraft including a variety of boats and ships, aircraft, and
the like, and includes hybrid vehicles, electric vehicles, plug-in
hybrid electric vehicles, hydrogen-powered vehicles and other
alternative fuel vehicles (e.g. fuels derived from resources other
than petroleum). As referred to herein, a hybrid vehicle is a
vehicle that has two or more sources of power, for example both
gasoline-powered and electric-powered vehicles.
[0025] The methods and apparatuses of the present invention have
other features and advantages which will be apparent from or are
set forth in more detail in the accompanying drawings, which are
incorporated herein, and the following Detailed Description, which
together serve to explain certain principles of the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0026] FIGS. 1 and 2 are a perspective view and cross-sectional
views of a muffler of the related art, respectively.
[0027] FIGS. 3 and 4 are a perspective view and a cross-sectional
view of a muffler with a dual exhaust pipe for a vehicle according
to an exemplary embodiment of the present invention,
respectively.
[0028] It should be understood that the appended drawings are not
necessarily to scale, presenting a somewhat simplified
representation of various features illustrative of the basic
principles of the invention. The specific design features of the
present invention as disclosed herein, including, for example,
specific dimensions, orientations, locations, and shapes will be
determined in part by the particular intended application and use
environment.
[0029] In the figures, reference numbers refer to the same or
equivalent parts of the present invention throughout the several
figures of the drawing.
DETAILED DESCRIPTION
[0030] Reference will now be made in detail to various embodiments
of the present invention(s), examples of which are illustrated in
the accompanying drawings and described below. While the
invention(s) will be described in conjunction with exemplary
embodiments, it will be understood that the present description is
not intended to limit the invention(s) to those exemplary
embodiments. On the contrary, the invention(s) is/are intended to
cover not only the exemplary embodiments, but also various
alternatives, modifications, equivalents and other embodiments,
which may be included within the spirit and scope of the invention
as defined by the appended claims.
[0031] Hereinafter reference will now be made in detail to various
embodiments of the present invention, examples of which are
illustrated in the accompanying drawings and described below.
[0032] A muffler with a dual exhaust pipe for a vehicle according
to an exemplary embodiment of the present invention is described
hereafter with reference to the accompanying drawings.
[0033] A muffler according to an exemplary embodiment of the
present invention, as shown in FIGS. 3 and 4, includes a muffler
housing 51 having a predetermined sealed space, and an exhaust gas
intake pipe 61 and exhaust gas discharge pipes 62 that are disposed
at the muffler housing 51.
[0034] That is, first, second, and third baffles 52, 53, 54 are
fixed at predetermined distances in the front-rear direction in the
muffler housing 51 such that the inside of the muffler housing 51
is divided into first, second, third, and fourth chambers 55, 56,
57, 58 by the first, second, and third baffles 52, 53, 54.
[0035] The first and fourth chambers 55, 58 are positioned at the
front and rear ends in the muffler housing 51 and the second and
third chambers 56, 57 are positioned therebetween.
[0036] A plurality of air-through holes 52a, 53a, 54a are
integrally formed through the first, second, and third baffles 52,
53, 54, respectively.
[0037] The exhaust gas intake pipe 61 is inserted in the muffler
housing 51 through the front portion 59 of the muffler housing 51,
with the end disposed in the third chamber 57, and the exhaust gas
discharge pipes 62 are connected with the second chamber 56 and
discharge an exhaust gas to the outside of the muffler housing
51.
[0038] That is, the exhaust gas intake pipe 61 is inserted
sequentially through the front portion 59, the first chamber 55,
the first baffle 52, the second chamber 56, and the second baffle
53 of the muffler housing 51, with the end disposed in the third
chamber 57.
[0039] On the other hand, a plurality of holes 61a connected with
the second chamber 56 to implement sporty sound quality due to an
exhaust gas are formed at the portion, which is positioned in the
second chamber 56, in the exhaust gas intake pipe 61.
[0040] Further, the muffler according to an exemplary embodiment of
the present invention further includes acoustic absorbents 63, 64
that are filled in the first and fourth chambers 55, 58, reduce
exhaust noise, and absorb high-temperature heat of an exhaust
gas.
[0041] The acoustic absorbents 63, 64 are made of glass wool but
are not limited thereto.
[0042] Further, in the muffler according to an exemplary embodiment
of the present invention, the area of the first and fourth chambers
55, 58 filled with the acoustic absorbents 63, 64 is 40% to 80% of
the entire area of the muffler housing 51.
[0043] That is, the acoustic absorbents 63, 64 has high adiabatic
performance so that the first and fourth chambers 55, 58 filled
with the acoustic absorbents 63, 64 are cool sections in the
muffler housing 51. On the contrary, the second and third chambers
56, 57 that are not filled with the acoustic absorbents 63, 64 are
hot sections in the muffler housing 51 and the area of the hot
sections is about 20% to 60% of the entire area of the muffler
housing 51.
[0044] Since the area of the hot sections is about 20% to 60% of
the entire area of the muffler housing 51 in the muffler according
to an exemplary embodiment of the present invention and the area of
the hot sections is about 70% to 80% of the entire muffler housing
in mufflers of the related art, the muffler according to an
exemplary embodiment of the present invention has the advantage of
reducing damage to the car body due to heat from an exhaust gas by
greatly reducing the area of the hot sections (second and third
chambers) that transmits heat of the exhaust gas at a high
temperature to the car body.
[0045] The area of the hot sections (second and third chambers) can
be reduced by connecting the exhaust gas discharge pipes 62 to the
second chamber 56, that is, it is possible to decrease the size of
the third chamber 57 by connecting the discharge pipes 62 to the
second chamber 56 and to increase the size of the fourth chamber 58
filled with the acoustic absorbent 64 as much as the decrease of
the third chamber 57.
[0046] Therefore, as the size of the fourth chamber 58 filled with
the acoustic absorbent 64 increases, the area of the second and
third chambers 56, 57 that are the hot sections can be
correspondingly decreased so that it is possible to reduce damage
to the car body due to the heat of an exhaust gas at a high
temperature.
[0047] Further, as the exhaust gas discharge pipes 62 are connected
to the second chamber 56, in accordance with an exemplary
embodiment of the present invention, it is possible to considerably
elongate (increase the length of) the exhaust gas discharge pipes
62 so that it is possible to significantly reduce booming noise due
to an exhaust gas that is discharged outside.
[0048] Meanwhile, the exhaust gas discharge pipes 62 are
implemented with a dual pipe in the muffler according to an
exemplary embodiment of the present invention so that a dynamic and
powerful image and a refined image can strongly appeal to
customers, and thus, it is possible to greatly improve the
commercial value of a vehicle.
[0049] Therefore, when an exhaust gas flows into the third chamber
57 of the muffler housing 51 through the exhaust gas intake pipe
61, the exhaust noise is absorbed by the acoustic absorbent 64 in
the fourth chamber 58 so that high-frequency noise and air
flow-induced noise of the exhaust gas can be largely reduced.
[0050] Further, the exhaust gas flowing in the third chamber 57 hit
to the third baffle 54 and is bounced to the second baffle 53 by
pressure in the fourth chamber 58 and the exhaust gas turning to
the second baffle 53 flows into the second chamber 56 through the
air-through holes 53a of the second baffle 53 so that the air
flow-induced noise can be largely reduced again in this process
without increasing back pressure of the exhaust gas.
[0051] On the other hand, when the exhaust gas in the third chamber
57 flows into the second chamber 56 through the air-through holes
53a of the second baffle 53, the exhaust gas is uniformly
distributed by the air-through holes 53a, which are uniformly
disposed, and flow into the second chamber 56 so that the exhaust
gas flowing in the second chamber 56 is uniformly divided into the
two exhaust gas discharge pipes 62 and discharged outside.
[0052] Further, as the exhaust gas flows into the second chamber
56, the exhaust noise is absorbed by the acoustic absorbent 63 in
the first chamber 55 so that the high-frequency noise and air
flow-induced noise of the exhaust gas can be considerably reduced
again.
[0053] Further, since the exhaust gas flowing in the second chamber
56 is discharged outside through the exhaust gas discharge pipes 62
and the exhaust gas discharge pipes 62 of the muffler according to
an exemplary embodiment of the present invention are increased in
length in comparison to the related art, it is possible to
considerably reduce booming noise when the exhaust gas is
discharged outside through the exhaust gas discharge pipes 62.
[0054] Further, since the first and fourth chambers 55, 58 filled
with the acoustic absorbents 63, 64 are lager in area than the
second and third chamber 56, 57 not filled with the acoustic
absorbents 63, 64 in the muffler according to an exemplary
embodiment of the present invention, it is possible to considerably
reduce the area of the hot sections (second and third chambers) in
the muffler housing 51 and it is correspondingly possible to
largely reduce damage to the car body due to the heat of the
exhaust gas at a high temperature.
[0055] Further, the exhaust gas discharge pipes 62 are implemented
with a dual pipe in the muffler according to an exemplary
embodiment of the present invention so that a dynamic and powerful
image and a refined image can strongly appeal to customers, and
thus, it is possible to greatly improve the commercial value of a
vehicle.
[0056] According to an exemplary embodiment of the present
invention, it is possible to reduce air flow-induced noise, and
high-frequency noise and booming noise of the exhaust gas without
increasing back pressure of the exhaust gas, and further to
considerably reduce damage to the car body due to heat from an
exhaust gas.
[0057] For convenience in explanation and accurate definition in
the appended claims, the terms "upper", "lower", "inner" and
"outer" are used to describe features of the exemplary embodiments
with reference to the positions of such features as displayed in
the figures.
[0058] The foregoing descriptions of specific exemplary embodiments
of the present invention have been presented for purposes of
illustration and description. They are not intended to be
exhaustive or to limit the invention to the precise forms
disclosed, and obviously many modifications and variations are
possible in light of the above teachings. The exemplary embodiments
were chosen and described in order to explain certain principles of
the invention and their practical application, to thereby enable
others skilled in the art to make and utilize various exemplary
embodiments of the present invention, as well as various
alternatives and modifications thereof. It is intended that the
scope of the invention be defined by the Claims appended hereto and
their equivalents.
* * * * *