U.S. patent application number 09/740834 was filed with the patent office on 2002-06-27 for motor vehicle muffler.
Invention is credited to Chen, Shun-Lai.
Application Number | 20020079160 09/740834 |
Document ID | / |
Family ID | 24978273 |
Filed Date | 2002-06-27 |
United States Patent
Application |
20020079160 |
Kind Code |
A1 |
Chen, Shun-Lai |
June 27, 2002 |
MOTOR VEHICLE MUFFLER
Abstract
A motor vehicle muffler having a muffler loop installed in a
casing in the exhaust pipe of a motor vehicle, the muffler loop
formed of three muffler tubes and two connecting tubes, the muffler
tubes being arranged at different elevations in the casing and
crossed by one another at the same point, the connecting tubes
being arranged in parallel outside the casing to connect the
muffler tubes in series.
Inventors: |
Chen, Shun-Lai; (Changhwa
Hsien, TW) |
Correspondence
Address: |
Varndell & Varndell PLLC
106-A South Columbus Street
Alexandria
VA
22314
US
|
Family ID: |
24978273 |
Appl. No.: |
09/740834 |
Filed: |
December 21, 2000 |
Current U.S.
Class: |
181/251 |
Current CPC
Class: |
F01N 2490/16 20130101;
F01N 1/24 20130101; F01N 2470/02 20130101 |
Class at
Publication: |
181/251 |
International
Class: |
F01N 001/02 |
Claims
1. A motor vehicle muffler comprising a casing installed in the
exhaust pipe of a motor vehicle, said casing having a front
sidewall and a rear sidewall and a muffler loop installed in said
casing and extended through the front and rear sidewalls of said
casing and adapted to soften sound upon flowing of waste gas from
said motor vehicle through said exhaust pipe, wherein said muffler
loop comprises: a first muffler tube obliquely connected between
the front sidewall and rear sidewall of said casing, said first
muffler tube having a plurality of muffling holes arranged around
the periphery thereof, a front end for input of waste gas from said
motor vehicle, and a rear end; a second muffler tube obliquely
connected between the front sidewall and rear sidewall of said
casing and crossed by said first muffler tube, said second muffler
tube having a plurality of muffling holes arranged around the
periphery thereof, a front end, and a rear end; a third muffler
tube connected between the front sidewall and rear sidewall of said
casing and crossed by said second muffler tube, said third muffler
tube having a plurality of muffling holes arranged around the
periphery thereof, a front end, and a rear end for output of waste
gas; a first connecting tube suspended outside said casing, said
first connecting tube having a front bent connected to the front
end of said second muffler tube, and a rear bent connected to the
rear end of said first muffler tube; and a second connecting tube
suspended outside said casing, said second connecting tube having a
front bent connected to the front end of said third muffler tube,
and a rear end connected to the rear end of said second muffler
tube.
2. The motor vehicle muffler of claim 1 wherein said first muffler
tube, said second muffler tube and said third muffler tube are
arranged at different elevations and crossed by one another at one
point.
Description
BACKGROUND AND SUMMARY OF THE INVENTION
[0001] The present invention relates to a motor vehicle muffler
and, more particularly, to such a motor vehicle muffler, which
comprises a casing stuffed with a stuffing sponge material, and a
muffler loop installed in the casing and adapted to soften sound
from waste gas passing through, the muffler loop being formed of
crossed muffler tubes, and connecting tubes that connect the
crossed muffler tubes in series.
[0002] A regular motor vehicle muffler, as shown in FIG. 1, is
generally comprised of a cylindrical casing, a first muffler tube
connected between the front and rear ends of the casing for input
of waste gas, a second muffler tube connected between the front and
rear ends of the casing in parallel to the first muffler tube for
output of waste gas, and a connecting tube suspended outside the
casing to connect the first muffler tube and the second muffler
tube in parallel. The muffler tubes each have a plurality of
muffling holes arranged around the periphery. This structure of
motor vehicle muffler is still not satisfactory in function. When
waste gas escapes out of the muffling holes of the muffler tubes,
the currents of waste gas from the first muffler tube may conflict
with the currents of waste gas from the second muffler tube,
causing an unstable sound frequency or resonance.
[0003] The invention has been accomplished to provide a motor
vehicle muffler, which eliminates the aforesaid drawbacks. It is
one object of the present invention to provide a motor vehicle
muffler, which effectively soften sound. It is another object of
the present invention to provide a motor vehicle muffler, which
greatly improves the combustion efficiency of the motor vehicle
and, reduces the amount of incomplete combustion gas. According to
the present invention, the motor vehicle muffler comprises a casing
stuffed with a stuffing sponge material, and a muffler loop
installed in the casing and adapted to soften sound from waste gas
passing through The muffler loop is comprised of three muffler
tubes connected between front and rear sidewalls of the casing at
different elevations and crossed by one another at the same point,
and connecting tubes suspended outside the casing and connecting
the crossed muffler tubes in series.
BRIEF DESCRIPTION OF THE DRAWINGS
[0004] FIG. 1 is a cutaway view of a motor vehicle muffler
according to the prior art.
[0005] FIG. 2 is an elevational view of a motor vehicle muffler
according to the present invention.
[0006] FIG. 3 is a cutaway view of the motor vehicle muffler
according to the present invention.
[0007] FIG. 4 is a sectional top view of the motor vehicle muffler
according to the present invention.
[0008] FIG. 5 is a sectional view taken along line 5-5 of FIG.
4.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0009] Referring to Figures from 2 through 5, a muffler I is shown
comprising a casing 10, three muffler tubes, namely, the first
muffler tube 13, the second muffler tube 14 and the third muffler
tube 15 installed in the casing 10, two connecting tubes, namely,
the first connecting tube 11 and the second connecting tube 12
mounted outside the casing 10, and stuffing sponge material 17. The
muffler tubes 13, 14 and 15 each have a front end connected to the
front sidewall of the casing 10, a rear end connected to the rear
sidewall of the casing 10, and a plurality of muffling holes 16 for
softening sound. The first muffler tube 13 is obliquely connected
between the front and rear sidewalls of the casing 10, having its
front end extended out of the front sidewall of the casing 10 and
connected to the exhaust port of the engine of the motor vehicle in
which the muffler 1 is installed. The second muffler tube 14 is
obliquely connected between the front and rear sidewalls of the
casing 10 and crossed by the first muffler tube 13. The third
muffler tube 15 is a curved tubular member connected between the
front and rear sidewalls of the casing 10 and crossed by the second
muffler tube 14. The rear end of the third muffler tube 15 is
connected to the exhaust pipe (not shown) for output of waste gas.
The first connecting tube 11 has two bents 110 extended from two
ends thereof and respectively connected to the rear end of the
first muffler 13 and the front end of the second muffler 14. The
second connecting tube 12 has two bents 120 extended from two ends
thereof and respectively connected to the front end of the third
muffler tube 15 and the rear end of the second muffler tube 14. The
stuffing sponge material 17 is packed tightly in the casing 10
around the muffler tubes 13, 14 and 15. When assembled, the muffler
tubes 13, 14 and 15 are disposed at different elevations, and
crossed by one another at one point.
[0010] When in use, waste gas flows in proper order through the
first muffler tube 13, the first connecting tube 11, the second
muffler tube 14, the second connecting tube 12 and the third
muffler tube 15, and then flows out of the exhaust pipe of the
motor vehicle. When waste gas passing through the first muffler
tube 13, a small amount of waste gas passes out of the muffling
holes 16 of the first muffler tube 13 into the stuffing sponge
material 17, and the major of waste gas passes through the first
connecting tube 11 to the second muffler tube 14. When passing
through the second muffler tube 14, a small amount of waste gas
passes out of the muffling holes 16 of the second muffler tube 14
to buffer the escaped currents of waste gas from the muffling holes
16 of the first muffler tube 13. Similarly, when passing through
the third muffler tube 15, a small amount of waste gas passes out
of the muffling holes 16 of the third muffler tube 15 to buffer the
escaped currents of waste gas from the fist muffler tube 13 and the
second muffler tube 14. The muffler tubes 13, 14 and 15 and the
connecting tubes 11 and 12 form a long muffler loop that improves
the torque of the motor vehicle. Because waste gas stays much time
in the long muffler loop, less noise is produced, and the
combustion efficiency of the motor vehicle is relatively
improved.
[0011] While only one embodiment of the present invention has been
shown and described, it will be understood that various
modifications and changes could be made thereunto without departing
from the spirit and scope of the invention disclosed.
* * * * *