U.S. patent application number 17/031850 was filed with the patent office on 2021-04-15 for exhaust system for internal combustion engine.
The applicant listed for this patent is FAURECIA EMISSION CONTROL TECHNOLOGIES (SHANGHAI) CO., LTD. Invention is credited to Dennis BOENNEN, Pengzhou GU, Olivier PULA, Ke YIN, Le YU, BO YUAN.
Application Number | 20210108544 17/031850 |
Document ID | / |
Family ID | 1000005118473 |
Filed Date | 2021-04-15 |
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United States Patent
Application |
20210108544 |
Kind Code |
A1 |
BOENNEN; Dennis ; et
al. |
April 15, 2021 |
EXHAUST SYSTEM FOR INTERNAL COMBUSTION ENGINE
Abstract
The present disclosure provides an exhaust system for an
internal combustion engine, the exhaust system comprising a first
exhaust pipe, a muffler and a second exhaust pipe, and the muffler
is mounted between the first exhaust pipe and the second exhaust
pipe, the first exhaust pipe is located upstream of the muffler,
and the second exhaust pipe is located downstream of the muffler;
the second exhaust pipe comprises a single exhaust pipe, the single
exhaust pipe having one end connected to a downstream end of the
muffler, and the single exhaust pipe being provided with a
plurality of connecting holes; or, the second exhaust pipe
comprises the single exhaust pipe and a dual exhaust pipe branch,
the single exhaust pipe having one end connected to the downstream
end of the muffler and the other end connected to the dual exhaust
pipe branch.
Inventors: |
BOENNEN; Dennis; (SHANGHAI,
CN) ; GU; Pengzhou; (SHANGHAI, CN) ; YUAN;
BO; (SHANGHAI, CN) ; PULA; Olivier; (SHANGHAI,
CN) ; YU; Le; (SHANGHAI, CN) ; YIN; Ke;
(SHANGHAI, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
FAURECIA EMISSION CONTROL TECHNOLOGIES (SHANGHAI) CO., LTD |
SHANGHAI |
|
CN |
|
|
Family ID: |
1000005118473 |
Appl. No.: |
17/031850 |
Filed: |
September 24, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F01N 2470/20 20130101;
F01N 1/023 20130101; F01N 1/163 20130101; F01N 13/14 20130101; F01N
13/1844 20130101 |
International
Class: |
F01N 1/02 20060101
F01N001/02; F01N 1/16 20060101 F01N001/16; F01N 13/14 20060101
F01N013/14; F01N 13/18 20060101 F01N013/18 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 11, 2019 |
CN |
201921694694.8 |
Claims
1. An exhaust system for an internal combustion engine, comprising:
a first exhaust pipe, a muffler and a second exhaust pipe, wherein
the muffler is mounted between the first exhaust pipe and the
second exhaust pipe, the first exhaust pipe is located upstream of
the muffler, and the second exhaust pipe is located downstream of
the muffler; the second exhaust pipe comprises a single exhaust
pipe, the single exhaust pipe having a first end connected to a
downstream end of the muffler, and the single exhaust pipe being
provided with a plurality of connecting holes; or the second
exhaust pipe comprises the single exhaust pipe and a dual exhaust
pipe branch, the single exhaust pipe having the first end connected
to the downstream end of the muffler and a second end connected to
the dual exhaust pipe branch, and the single exhaust pipe and the
dual exhaust pipe branch being respectively provided with a
plurality of connecting holes.
2. The exhaust system for an internal combustion engine of claim 1,
wherein the second exhaust pipe has a length greater than 1
meter.
3. The exhaust system for an internal combustion engine of claim 1,
wherein a connecting hole is a round hole, and the total equivalent
area of the round hole is greater than or equal to that of a round
hole with a diameter of 2 mm and smaller than that of a round hole
with a diameter of 30 mm.
4. The exhaust system for an internal combustion engine of claim 1,
wherein a connecting hole is a rectangular hole, and the total
equivalent area of the rectangular hole is greater than or equal to
that of a round hole with a diameter of 2 mm and smaller than that
of a round hole with a diameter of 30 mm.
5. The exhaust system for an internal combustion engine of claim 1,
wherein a connecting hole is of a micro-perforation structure, and
the total equivalent area of the micro-perforation structure is
greater than or equal to that of a round hole with a diameter of 2
mm and smaller than that of a round hole with a diameter of 30
mm.
6. The exhaust system for an internal combustion engine of claim 1,
wherein an external heat shield is arranged on the connecting hole,
the external heat shield is an enclosed heat shield or a heat
shield provided with an open pore, and the total equivalent area of
the open pore is greater than or equal to that of a round hole with
a diameter of 2 mm and smaller than that of a round hole with a
diameter of 30 mm.
7. The exhaust system for an internal combustion engine of claim 1,
wherein a Helmholtz resonator is provided on the connecting hole,
and the Helmholtz resonator has a volume smaller than or equal to 1
L.
8. The exhaust system for an internal combustion engine of claim 7,
wherein the Helmholtz resonator is provided in a form of a neck
patch, a neck pipe or other transfer passage.
9. The exhaust system for an internal combustion engine of claim 1,
wherein the first exhaust pipe is further provided with an on-pipe
noise-regulating valve.
Description
CROSS REFERENCE TO THE RELATED APPLICATION
[0001] This application is based upon and claims priority to
Chinese Patent Application No. 201921694694.8, filed on Oct. 11,
2019, the entire content of which is incorporated herein by
reference.
FIELD
[0002] The present disclosure relates to the automotive field, and
in particular to an exhaust system for an internal combustion
engine.
BACKGROUND
[0003] In the automotive field, an exhaust system is a system for
controlling emissions and noises of a vehicle, and is arranged
under an entire chassis of the vehicle, connected to an exhaust
manifold of an engine, and suspended below a floor of a vehicle
body. Therefore, the exhaust system usually has a complicated shape
trend, but it is also a key component related to the vibration and
noises of the whole vehicle.
[0004] A muffler is mainly used to reduce exhaust noises of the
engine and ensure that high-temperature waste gases are exhausted
safely and efficiently. As a part of an exhaust pipe, the muffler
shall ensure smooth gas exhaust, little resistance, and sufficient
strength.
[0005] FIG. 1 is a schematic structural diagram of an exhaust
system for an internal combustion engine in the prior art. FIG. 2
is a front view of the exhaust system for an internal combustion
engine in the prior art. FIG. 3 is a perspective view of another
exhaust system for an internal combustion engine in the prior
art.
[0006] As shown in FIG. 1 to FIG. 3, a conventional exhaust system
for an internal combustion engine usually comprises at least two
mufflers 20, which increase the weight of an exhaust system for a
gasoline engine, need more installation space, and also greatly
increase costs.
[0007] In view of this, embodiments of the present disclosure have
improved the structure of the exhaust system for a gasoline engine
in order to overcome the above problems.
SUMMARY OF THE DISCLOSURE
[0008] The problem to be solved in the present disclosure is to
provide an exhaust system for an internal combustion engine to
overcome the defects of an increase in the weight of the exhaust
system and a need of more installation space caused by a large
number of mufflers mounted at an exhaust system for an internal
combustion engine in the prior art.
[0009] The problem mentioned above is solved in the present
disclosure by the following embodiments:
[0010] an exhaust system for an internal combustion engine,
comprising: a first exhaust pipe, a muffler and a second exhaust
pipe, and the muffler is mounted between the first exhaust pipe and
the second exhaust pipe, the first exhaust pipe is located upstream
of the muffler, and the second exhaust pipe is located downstream
of the muffler;
[0011] the second exhaust pipe comprises a single exhaust pipe, the
single exhaust pipe having one end connected to a downstream end of
the muffler, and the single exhaust pipe being provided with a
plurality of connecting holes; or
[0012] the second exhaust pipe comprises the single exhaust pipe
and a dual exhaust pipe branch, the single exhaust pipe having one
end connected to the downstream end of the muffler and the other
end connected to the dual exhaust pipe branch, and the single
exhaust pipe and the dual exhaust pipe branch being respectively
provided with a plurality of connecting holes.
[0013] According to an embodiment of the present disclosure, the
second exhaust pipe has a length greater than 1 meter.
[0014] According to an embodiment of the present disclosure, the
connecting hole is a round hole, and the total equivalent area of
the round hole is greater than or equal to that of a round hole
with a diameter of 2 mm and smaller than that of a round hole with
a diameter of 30 mm.
[0015] According to an embodiment of the present disclosure, the
connecting hole is a rectangular hole, and the total equivalent
area of the rectangular hole is greater than or equal to that of a
round hole with a diameter of 2 mm and smaller than that of a round
hole with a diameter of 30 mm.
[0016] According to an embodiment of the present disclosure, the
connecting hole is of a micro-perforation structure, and the total
equivalent area of the micro-perforation structure is greater than
or equal to that of a round hole with a diameter of 2 mm and
smaller than that of a round hole with a diameter of 30 mm.
[0017] According to an embodiment of the present disclosure, an
external heat shield is provided on the connecting hole, the
external heat shield is an enclosed heat shield or a heat shield
provided with an open pore, and the total equivalent area of the
open pore is greater than or equal to that of a round hole with a
diameter of 2 mm and smaller than that of a round hole with a
diameter of 30 mm.
[0018] According to an embodiment of the present disclosure, a
Helmholtz resonator is provided on the connecting hole, and the
Helmholtz resonator has a volume smaller than or equal to 1 L.
[0019] According to an embodiment of the present disclosure, the
Helmholtz resonator is provided in the form of a neck patch, a neck
pipe or other transfer passage.
[0020] According to an embodiment of the present disclosure, the
first exhaust pipe is further provided with an on-pipe
noise-regulating valve.
[0021] The positive progressive effect of the present disclosure
lies in that
[0022] the exhaust system for a gasoline engine of the present
disclosure can achieve the effects of weakening vibration and
reducing noises only by using one muffler at a cold end. Moreover,
a pore, the HHR (Helmholtz resonator) and a perforated plate are
used to restrain standing waves. The exhaust system for a gasoline
engine reduces the volume of the muffler, the overall weight, and
the manufacturing cost.
[0023] The exhaust system for a gasoline engine uses a long exhaust
pipe and has a better acoustic performance at an idle speed and a
low rotating speed range.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The above-mentioned and other features, properties and
advantages of the present disclosure will become more apparent from
the following description of the embodiments with reference to the
accompanying drawings, and the same reference numerals denote the
same features throughout the figures. In the figures:
[0025] FIG. 1 is a perspective view of an exhaust system for an
internal combustion engine in the prior art.
[0026] FIG. 2 is a front view of the exhaust system for an internal
combustion engine in the prior art.
[0027] FIG. 3 is a perspective view of another exhaust system for
an internal combustion engine in the prior art.
[0028] FIG. 4 is a perspective view of an exhaust system for an
internal combustion engine according to an embodiment of the
present disclosure.
[0029] FIG. 5 is a front view of the exhaust system for an internal
combustion engine according to an embodiment of the present
disclosure.
[0030] FIG. 6 is a perspective view of an exhaust system for an
internal combustion engine according to another embodiment of the
present disclosure.
[0031] FIG. 7 is a first schematic diagram of a connecting hole in
an exhaust system for an internal combustion engine of the present
disclosure.
[0032] FIG. 8 is a second schematic diagram of the connecting hole
in the exhaust system for an internal combustion engine of the
present disclosure.
[0033] FIG. 9 is a third schematic diagram of the connecting hole
in the exhaust system for an internal combustion engine of the
present disclosure.
[0034] FIG. 10 is a first schematic diagram of an external heat
shield arranged at the connecting hole in the exhaust system for an
internal combustion engine of the present disclosure.
[0035] FIG. 11 is a second schematic diagram of the external heat
shield arranged at the connecting hole in the exhaust system for an
internal combustion engine of the present disclosure.
[0036] FIG. 12 is a third schematic diagram of the external heat
shield arranged at the connecting hole in the exhaust system for an
internal combustion engine of the present disclosure.
[0037] FIG. 13 is a first schematic diagram of a Helmholtz
resonator arranged at the connecting hole in the exhaust system for
an internal combustion engine of the present disclosure.
[0038] FIG. 14 is a second schematic diagram of the Helmholtz
resonator arranged at the connecting hole in the exhaust system for
an internal combustion engine of the present disclosure.
[0039] FIG. 15 is a schematic diagram of an on-pipe
noise-regulating valve arranged on a first exhaust pipe of the
exhaust system for an internal combustion engine of the present
disclosure.
[0040] FIG. 16 is a schematic structural diagram of the on-pipe
noise-regulating valve.
REFERENCE NUMERALS
TABLE-US-00001 [0041] First exhaust pipe 10 Muffler 20 Second
exhaust pipe 30 Single exhaust pipe 31 Dual exhaust pipe branch 32
Connecting hole 33 External heat shield 40 Open pore 41 Helmholtz
resonator 50 On-pipe noise-regulating valve 60 Pipe body 61 Torsion
return spring 62 Partition 63 Maximum position p2 Initial position
p1
DETAILED DESCRIPTION OF EMBODIMENTS
[0042] In order to make the object, features and advantages
mentioned above of the present disclosure more apparent and easily
understood, particular embodiments of the present disclosure will
be described in detail below with reference to the accompanying
drawings.
[0043] Embodiments of the present disclosure will now be described
in detail with reference to the accompanying drawings. Reference
will now be made in detail to embodiments of the present
disclosure, with examples thereof being illustrated in the
accompanying drawings. The same reference numerals used throughout
the figures denote identical or similar parts wherever
possible.
[0044] Furthermore, although the terms used in the present
disclosure are selected from well-known common terms, some of the
terms mentioned in the description of the present disclosure may
have been selected by the applicant according to his or her
determination, and the detailed meaning thereof is described in the
relevant section described herein.
[0045] Furthermore, the present disclosure should be understood,
not simply by the actual terms used but also by the meanings
encompassed by each term.
[0046] FIG. 4 is a perspective view of an exhaust system for an
internal combustion engine according to an embodiment of the
present disclosure. FIG. 5 is a front view of the exhaust system
for an internal combustion engine according to an embodiment of the
present disclosure.
[0047] As shown in FIG. 4 and FIG. 5, disclosed is an exhaust
system for an internal combustion engine, the exhaust system
comprising a first exhaust pipe 10, a muffler 20 and a second
exhaust pipe 30, and the muffler 20 is mounted between the first
exhaust pipe 10 and the second exhaust pipe 30, the first exhaust
pipe 10 is located upstream of the muffler 20 and the second
exhaust pipe 30 is located downstream of the muffler 20.
[0048] The second exhaust pipe 30 comprises a single exhaust pipe
31 and a dual exhaust pipe branch 32, the single exhaust pipe 31
has one end connected to a downstream end of the muffler 20, the
single exhaust pipe 31 has the other end connected to the dual
exhaust pipe branch 32, and the single exhaust pipe 31 and the dual
exhaust pipe branch 32 are respectively provided with a plurality
of connecting holes 33.
[0049] FIG. 6 is a perspective view of an exhaust system for an
internal combustion engine according to another embodiment of the
present disclosure.
[0050] As shown in FIG. 6, the second exhaust pipe 30 in the
exhaust system for an internal combustion engine can further
comprise a single exhaust pipe 31 only, the single exhaust pipe 31
has one end connected to the downstream end of the muffler 20, and
the single exhaust pipe 31 is provided with a plurality of
connecting holes 33.
[0051] In one embodiment, the second exhaust pipe 30 herein is
located at the downstream end of the muffler 20, with a length
greater than 1 meter.
[0052] FIG. 7 is a first schematic diagram of a connecting hole in
an exhaust system for an internal combustion engine of the present
disclosure. FIG. 8 is a second schematic diagram of the connecting
hole in the exhaust system for an internal combustion engine of the
present disclosure. FIG. 9 is a third schematic diagram of the
connecting hole in the exhaust system for an internal combustion
engine of the present disclosure.
[0053] As shown in FIG. 7 to FIG. 9, the connecting hole 33 can be
arranged in various shapes, for example, the connecting hole 33 may
be a round hole, and the total equivalent area of the round hole is
greater than or equal to that of a round hole with a diameter of 2
mm and smaller than that of a round hole with a diameter of 30 mm.
Or, the connecting hole 33 may be a rectangular hole or a prolate
oblong hole, and the total equivalent area of the rectangular hole
or the prolate oblong hole is greater than or equal to that of a
round hole with a diameter of 2 mm and smaller than that of a round
hole with a diameter of 30 mm. Or, the connecting hole 33 may be of
a micro-perforation structure, and the total equivalent area of the
micro-perforation structure is greater than or equal to that of a
round hole with a diameter of 2 mm and smaller than that of a round
hole with a diameter of 30 mm.
[0054] FIG. 10 is a first schematic diagram of an external heat
shield arranged at the connecting hole in the exhaust system for an
internal combustion engine of the present disclosure. FIG. 11 is a
second schematic diagram of the external heat shield arranged at
the connecting hole in the exhaust system for an internal
combustion engine of the present disclosure. FIG. 12 is a third
schematic diagram of the external heat shield arranged at the
connecting hole in the exhaust system for an internal combustion
engine of the present disclosure.
[0055] As shown in FIG. 10 to FIG. 12, particularly, an external
heat shield 40 may also be arranged on the connecting hole 33, the
external heat shield 40 may be an enclosed heat shield or a heat
shield provided with an open pore 41, and the total equivalent area
of the open pore is greater than or equal to that of a round hole
with a diameter of 2 mm and smaller than that of a round hole with
a diameter of 30 mm.
[0056] The external heat shield 40 can be provided with an open
hole 41 or uniformly provided with a plurality of open pores 41 in
an annular way. The enclosed heat shield may also be provided with
glass wool to prevent the enclosed heat shield from leaking
unexpectedly.
[0057] FIG. 13 is a first schematic diagram of a Helmholtz
resonator arranged at the connecting hole in the exhaust system for
an internal combustion engine of the present disclosure. FIG. 14 is
a second schematic diagram of the Helmholtz resonator arranged at
the connecting hole in the exhaust system for an internal
combustion engine of the present disclosure.
[0058] As shown in FIG. 13 and FIG. 14, further, the Helmholtz
resonator 50 can further be provided on the connecting hole 33, and
the Helmholtz resonator 50 has a volume smaller than or equal to 1
L. The area of the connecting hole 33 is smaller than or equal to
that of a round hole with a diameter of 20 mm.
[0059] The Helmholtz resonator 50 can be provided in the form of a
neck patch, a neck pipe or other transfer passage. A neck patch of
an inner transfer passage has an equivalent area smaller than or
equal to the area of a round ring with a diameter of 15 mm. A neck
pipe of the inner transfer passage has an equivalent area of
smaller than or equal to the area of a round ring with a diameter
of 15 mm.
[0060] Or, the Helmholtz resonator can be provided in the form of
other transfer passage made of a metal plate, with an equivalent
area smaller than or equal to the area of a round ring with a
diameter of 15 mm.
[0061] FIG. 15 is a schematic diagram of an on-pipe
noise-regulating valve arranged on a first exhaust pipe of the
exhaust system for an internal combustion engine of the present
disclosure. FIG. 16 is a schematic structural diagram of the
on-pipe noise-regulating valve.
[0062] As shown in FIG. 15 and FIG. 16, still further, the first
exhaust pipe 10 is further provided with an on-pipe
noise-regulating valve 60. The flow of a fluid is regulated, guided
or controlled by opening, closing or partially blocking various
passages. The on-pipe noise-regulating valve can improve the noise
sequence by regulating a back pressure of the exhaust system.
[0063] The on-pipe noise-regulating valve 60 comprises a pipe body
61, at least one rotating shaft (not shown in the figures), a
torsion return spring 62, and a partition 63 which is connected to
the rotating shaft. An appropriate air flow can drive the partition
63 to rotate around the rotating shaft to a corresponding position.
The maximum air flow can drive the partition to rotate to the
maximum position p2, and the partition returns to an initial
position p1 when the air flow is relatively small or where there is
no air flow.
[0064] In summary, the exhaust system for a gasoline engine in the
present disclosure can achieve the effects of weakening vibration
and reducing noises only by using one muffler at a cold end. The
exhaust system for a gasoline engine reduces the volume of the
muffler, the overall weight, and the manufacturing cost.
[0065] The exhaust system for a gasoline engine uses a long exhaust
pipe and has a better acoustic performance at an idle speed and a
low rotating speed range.
* * * * *