U.S. patent application number 11/944652 was filed with the patent office on 2009-03-12 for fixing device of catalyst substrate.
Invention is credited to Wen Shing Chang, Yu-Hsuan Cho.
Application Number | 20090065296 11/944652 |
Document ID | / |
Family ID | 40430649 |
Filed Date | 2009-03-12 |
United States Patent
Application |
20090065296 |
Kind Code |
A1 |
Chang; Wen Shing ; et
al. |
March 12, 2009 |
Fixing Device of Catalyst Substrate
Abstract
A fixing device includes a muffler and a catalyst mantle. The
muffler is communicated with an exhausting route of an internal
combustion engine. The muffler has at least one clapboard to divide
inner space thereof for forming a plurality of expanding rooms,
which are communicated with each other and configured for guiding
waste gas. The catalyst mantle is integrated on the clapboard. The
catalyst mantle has an admission terminal and an exhaust terminal
communicated with the plurality of expanding rooms. A substrate
having catalyst coated thereon is arranged in the catalyst mantle
between the admission terminal and the exhaust terminal. At least
one block is configured for preventing the substrate sliding to the
exhaust terminal and a stopper is formed on the clapboard or an
inner wall of the muffler for preventing the substrate sliding to
the admission terminal. The fixing device improves the fixing
capacity of the substrate, and decreases the manufacturing steps
for arranging the catalyst mantle in the muffler.
Inventors: |
Chang; Wen Shing; (Lungtan,
TW) ; Cho; Yu-Hsuan; (Lungtan, TW) |
Correspondence
Address: |
HDLS Patent & Trademark Services
P.O. BOX 220746
CHANTILLY
VA
20153-0746
US
|
Family ID: |
40430649 |
Appl. No.: |
11/944652 |
Filed: |
November 26, 2007 |
Current U.S.
Class: |
181/255 |
Current CPC
Class: |
F01N 13/1872 20130101;
F01N 3/2842 20130101; F01N 13/1888 20130101 |
Class at
Publication: |
181/255 |
International
Class: |
F01N 1/00 20060101
F01N001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 12, 2007 |
TW |
096215280 |
Claims
1. A fixing device of catalyst substrate, comprising: a muffler
communicated with an exhausting route of an internal combustion
engine, the muffler having at least one clapboard to divide an
inner space thereof for forming a plurality of expanding rooms
which are communicated with each other and configured for guiding
waste gas; a catalyst mantle integrated on the clapboard, the
catalyst mantle having an admission terminal and an exhaust
terminal communicated with the plurality of expanding rooms, a
substrate having catalyst coated thereon being arranged in the
catalyst mantle between the admission terminal and the exhaust
terminal, the catalyst mantle further including at least one block
configured for preventing the substrate sliding to the exhaust
terminal; and a stopper formed on the clapboard or an inner wall of
the muffler for preventing the substrate sliding to the admission
terminal.
2. The fixing device of catalyst substrate as claimed in claim 1,
wherein the block is a baring pole integrated on the exhaust
terminal of the catalyst mantle, the baring pole has a shape
selected from a group consisting of intersecting-shape, arc-shape,
and fin-shape.
3. The fixing device of catalyst substrate as claimed in claim 1,
wherein the block is scraggy or corrugated, and has at least one
groove attached on the substrate for preventing the substrate
sliding, and at least one protrusion spacing from the groove to
form a vent hole.
4. The fixing device of catalyst substrate as claimed in claim 1,
wherein the stopper is a curved stopping strip with two ends welded
on the clapboard and an indention for receiving the substrate.
5. The fixing device of catalyst substrate as claimed in claim 1,
wherein the stopper is a curved stopping strip with two ends welded
on the inner wall and a crowning for the substrate resting thereon,
or the stopper is formed as a crowning portion of the inner wall
for the substrate resting thereon.
6. A fixing device of catalyst substrate, comprising: a muffler
communicated with an exhausting route of an internal combustion
engine, the muffler having at least one clapboard to divide inner
space thereof for forming a plurality of expanding rooms, which are
communicated with each other and configured for guiding waste gas,
the clapboard having at least one block formed thereon; a catalyst
mantle integrated on the clapboard, the catalyst mantle having an
admission terminal and an exhaust terminal communicated with the
plurality of expanding rooms, a substrate having catalyst coated
thereon being arranged in the catalyst mantle between the admission
terminal and the exhaust terminal, the block being configured for
preventing the substrate sliding to the exhaust terminal; and a
stopper formed on the clapboard or on an inner wall of the muffler
for preventing the substrate sliding to the admission terminal.
7. The fixing device of catalyst substrate as claimed in claim 6,
wherein the block is a baring pole integrated on the exhaust
terminal of the catalyst mantle, the baring pole has a shape
selected from a group consisting of intersecting-shape, arc-shape,
and fin-shape.
8. The fixing device of catalyst substrate as claimed in claim 6,
wherein the block is scraggy or corrugated, and has at least one
groove attached on the substrate for preventing the substrate
sliding, and at least one protrusion spacing from the groove to
form a vent hole.
9. The fixing device of catalyst substrate as claimed in claim 6,
wherein the stopper is a curved stopping strip with two ends welded
on the clapboard and an indention for receiving the substrate.
10. The fixing device of catalyst substrate as claimed in claim 6,
wherein the stopper is a curved stopping strip with two ends welded
on the inner wall and a crowning for the substrate resting thereon,
or the stopper is formed as a crowning portion of the inner wall
for the substrate resting thereon.
Description
1. FIELD OF THE INVENTION
[0001] The present invention relates to a catalytic converter
arranged in a muffler of an internal combustion engine, and more
particularly to a fixing device of catalyst substrate preventing
the catalyst substrate of the catalyst converter sliding to a
guiding or an exhausting direction.
2. DESCRIPTION OF THE RELATED ART
[0002] For satisfying increasingly strict standard for exhausting
waste gas, manufacturers generally use at least one catalytic
converter arranged in an exhausting route of an internal combustion
engine which is arranged in cars, motorcycles or mowers, etc. The
catalytic converter has a metal mantle and at least one metal
substrate having catalyst coated thereon. The catalyst generally is
selected from a group of noble metal consisting of palladium (Pd),
platinum (Pt), rhodium (Rh), etc., for cleaning the waste gas and
reducing the pollution of the waste gas.
[0003] The metal substrate is generally formed by welding and
coupling a flat foil and a corrugated foil, and being rolled to be
a turbination for being inserted into the metal mantle. Then the
metal substrate is welded with the metal mantle to be integrated
for forming a plurality of exhausting routes for exhausting the
waste gas therein.
[0004] However, the cost is high by welding the flat foil and the
corrugated foil of the metal substrate, and welding the metal
substrate and the metal mantle. To solve the problem, a patent of
Taiwan Patent No 386571 discloses a technology for fixing the metal
substrate in the metal mantle. The technology includes a plurality
of fixing holes arranged in two terminals of the metal mantle for
containing the metal substrate, respectively, a fixing frame
arranged between the plurality of fixing holes to prevent the metal
substrate sliding out of the metal mantle because of high
temperature, shaking or blowing by the waste gas, and prevent the
catalyst coated on the metal substrate losing because of rubbing or
impacting. However, the technology must further form the plurality
of fixing holes and the fixing frame, and therefore, the steps of
the technology are increased. Furthermore, when the metal mantle is
arranged on the exhausting route of a muffler, the metal mantle
must be welded to be fixed on a clapboard of the muffler; thus, the
steps and the costs are also increased.
[0005] What is needed, therefore, is a fixing device of catalyst
substrate, which can solve the above problems.
BRIEF SUMMARY
[0006] The present invention is providing a fixing device of
catalyst substrate so that the catalyst substrate can be fixedly
secured in muffler.
[0007] A fixing device of catalyst substrate, in accordance with a
preferred embodiment of the present invention, includes a muffler
and a catalyst mantle. The muffler is communicated with an
exhausting route of an internal combustion engine. The muffler has
at least one clapboard to divide inner space thereof for forming a
plurality of expanding rooms, which are communicated with each
other and configured for guiding waste gas. The catalyst mantle is
integrated on the clapboard. The catalyst mantle has an admission
terminal and an exhaust terminal communicated with the plurality of
expanding rooms. A substrate having catalyst coated thereon is
arranged in the catalyst mantle between the admission terminal and
the exhaust terminal. The catalyst mantle further includes at least
one block configured for preventing the substrate sliding to the
exhaust terminal.
[0008] The present invention further includes the following
features.
[0009] The block is a baring pole integrated on the exhaust
terminal of the catalyst mantle. The baring pole is selected from a
group consisting of intersecting-shape, arc-shape, and
fin-shape.
[0010] The block is scraggy or corrugated, and has at least one
groove attached on the substrate for preventing the substrate
sliding, and at least one protrusion spacing from the groove to
form a vent hole.
[0011] The block also may be formed on the clapboard and integrated
with the clapboard.
[0012] Therefore, the present fixing device decreases the steps for
fixing the substrate in the metal mantle to increase the fixing
capacity of the substrate, and integrates the clapboard in the
muffler to decrease the steps for arranging the catalyst converter
in the muffler and increase the efficiency for assembling the
catalyst substrate and the catalyst mantle in the muffler.
[0013] Other objects, advantages and novel features of the
invention will become more apparent from the following detailed
description when taken in conjunction with the accompanying
drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] These and other features and advantages of the various
embodiments disclosed herein will be better understood with respect
to the following description and drawings, in which like numbers
refer to like parts throughout, and in which:
[0015] FIG. 1 is a schematic, cross-sectional view of a fixing
device of catalyst substrate in accordance with a first preferred
embodiment of the present invention;
[0016] FIG. 2 is a schematic, exploded view of the fixing device in
accordance with the first preferred embodiment;
[0017] FIG. 3 is a schematic, front view of a catalyst mantle in
accordance with the first preferred embodiment;
[0018] FIG. 4 is another schematic, front view of a catalyst mantle
in accordance with the first preferred embodiment;
[0019] FIG. 5 is other schematic, front view of a catalyst mantle
in accordance with the first preferred embodiment;
[0020] FIG. 6 is a schematic, cross-sectional view of a catalyst
mantle in accordance with the first preferred embodiment;
[0021] FIG. 7 is a schematic, cross-sectional view of another
catalyst mantle in accordance with the first preferred
embodiment;
[0022] FIG. 8 is a schematic, exploded view of a fixing device in
accordance with a second preferred embodiment;
[0023] FIG. 9 is a schematic, cross-sectional view of the fixing
device in accordance with the second preferred embodiment;
[0024] FIG. 10 is a schematic, part-enlarged view of FIG. 9;
and
[0025] FIG. 11 is a schematic, cross-sectional view of the fixing
device in accordance with the third preferred embodiment
DETAILED DESCRIPTION
[0026] Reference will now be made to the drawings to describe a
preferred embodiment of the present fixing device of catalyst
substrate, in detail.
[0027] Referring to FIG. 1, a fixing device of catalyst substrate
in accordance with a preferred embodiment of the present invention
is shown. The fixing device includes a muffler 1 and a catalyst
mantle 3 of a catalyst converter.
[0028] The muffler 1 is communicated with an exhausting route 10 of
an internal combustion engine of a vehicle. The muffler 1 has at
least one clapboard 2 (as shown in FIGS. 2 and 6 together) to
divide inner space thereof to form a first expanding room 11 and a
second expanding room 12 communicated with each other for guiding
waste gas. The first expanding room 11 is communicated with the
engine through an exhaust pipe 13 arranged in the exhausting route
10, and the second expanding room 12 is communicated with the
environment through a tail pipe 14 arranged in the muffler 1.
[0029] The catalyst mantle 3 is integrated on the clapboard 2. The
catalyst mantle 3 has an admission terminal 31 and an exhaust
terminal 32 formed thereon and communicated between the first
expanding room 11 and the second expanding room 12. The catalyst
mantle 3, which is between the admission terminal 31 and the
exhaust terminal 32, has at least one substrate 4 having catalyst
coated thereon. In this exemplary embodiment, the catalyst mantle 3
has a plurality of substrates 4, 41 with catalyst coated thereon
(as shown in FIGS. 2 and 3). The substrate 4 is a flat foil and the
substrate 41 is a corrugated foil. This exemplary embodiment rolls
the flat foil 4 and the corrugated foil 41 to be a turbinate
substrate 40, and a plurality of through holes 42 are formed
between the flat foil 4 and the corrugated foil 41. Each of the
through holes 42 is communicated between the admission terminal 31
and the exhaust terminal 32. Furthermore, at least one block 5 is
formed on the catalyst mantle 3 for preventing the substrate 40
sliding to the exhaust terminal 32, and at least one exhaust hole
51 (as shown in FIG. 6) is formed on the block 5 and communicated
with each of the through holes 42 and the second expanding room 12.
In addition, a stopper 6, as shown in FIGS. 1, 2 and 6, is provided
to restrict the substrate 40 fixedly positioned between the block 5
and the stopper 6 so that the substrate 40 can not slide to the
admission terminal 31 either.
[0030] The present further includes the following features.
[0031] The catalyst is selected from a group of noble metal
consisting of palladium (Pd), platinum (Pt), rhodium (Rh), etc.
[0032] The block is a baring pole 52 integrated on the exhaust
terminal 32 of the catalyst mantle 3. The baring pole 52 may be
intersecting-shaped, arc-shaped, or fin-shaped (as shown in FIGS.
2, 3, 4 and 5).
[0033] The stopper 6 is a curved stopping strip 61 with two ends
welded on the clapboard 2 and an indention for receiving the
substrate 40.
[0034] The present invention can be performed by the above members.
Especially when the engine starts to operate, the waste gas
produced by the engine is guided into the first expanding room 11
of the muffler 1 through the exhaust pipe 13 of the exhausting
route 10 (as shown in FIG. 1). Then the waste gas is guided through
the stopper 6 and into the plurality of through holes 42 of the
substrate 40 through the admission terminal 31 of the catalyst
mantle 3 (as shown in FIG. 6), and then is guided into the second
expanding room 12 through the exhaust hole 51 of the block 5 and
the exhaust terminal 32 of the catalyst mantle 3, and later is
exhausted to the environment through the tail pipe 14. During the
operation, the waste gas makes a redox reaction with the catalyst
arranged on the flat foil 4 and the corrugated foil 41 when the
waste gas passes through the plurality of through holes 42 to be
cleaned. At the same time, the waste gas blows the substrate 40 to
make the substrate 40 sliding to the exhaust terminal 32 of the
catalyst mantle 3, and the baring pole 52 of the block 5 and the
stopping strip 61 prevent the substrate 40 for sliding out of the
catalyst mantle 3 because of high temperature, shaking or blowing
by the waste gas, and preventing the catalyst coated on the
substrate 40 losing because of rubbing or impacting to increase the
fixing capacity and increase the using life of the substrate 40.
Therefore, the fixing device decreases the steps for fixing the
catalyst substrate 40 in the metal mantle 3, and integrates the
catalyst mantle 3 on the clapboard 2 of the muffler 1 to decrease
the steps for arranging the catalyst mantle 3 in the muffler 1, and
increases the efficiency for assembling the catalyst substrate 40
and the catalyst mantle 3 in the muffler 1 so that the cost can be
reduced.
[0035] Furthermore, the baring pole 52 of the block 5 may be
scraggy or corrugated (as shown in FIG. 7), and has at least one
groove 53 attached on the substrate 40 for preventing the substrate
40 sliding, and at least one protrusion 54 spacing with the groove
53 to form a vent hole 55. In this exemplary embodiment, the baring
pole 52 has a plurality of grooves 53 and a plurality of
protrusions 54, and a plurality of vent holes 55 is formed between
the plurality of grooves 53 and the plurality of protrusions 54.
The through holes 42 of the substrate 40 are communicated with the
vent holes 55. Therefore, the waste gas can be guided into the
second expanding room 12 through not only the plurality of through
holes 42 but also the plurality of vent holes 55 to increase the
smooth capacity of the substrate 40.
[0036] Furthermore, the catalyst mantle 3 is formed by stamping on
the clapboard 2. The catalyst mantle 3 may be also formed by
integrating with the clapboard 2. The catalyst mantle 3 may have a
flat foil 4 rolled to be a turbinate substrate therein.
[0037] Referring to FIG. 8, a fixing device of catalyst substrate
in accordance with a second preferred embodiment of the present
invention is shown. The second preferred embodiment discloses a
muffler 1a communicated with an exhausting route 10a of an internal
combustion engine of a mower (as shown in FIG. 9). The muffler 1a
is composed of an upper cover 16a and a lower cover 15a.
Furthermore, the muffler 1a has at least one clapboard 2a arranged
therein to divide the inner space thereof for forming a lower
expanding room 11a and an upper expanding room 12a communicated
with each other. At least one block 5a is formed on the clapboard
2a, and a catalyst mantle 3a is arranged on the clapboard 2a. The
catalyst mantle 3a has an admission terminal 31a and an exhaust
terminal 32a communicated between the lower expanding room 11a and
upper expanding rooms 12a. The catalyst mantle 3a between the
admission terminal 31a and the exhaust terminal 32a has at least
one foil 4 having catalyst coated thereon. In this exemplary
embodiment, a flat foil 4 and a corrugated foil 41 are rolled to
form a turbinate substrate 40 (as shown in FIGS. 2 and 10). The
block 5a can prevent the turbinate substrate 40 sliding to the
exhaust terminal 32a. In addition, a stopper 6a is provided to
restrict the substrate 40 fixedly positioned between the block 5a
and the stopper 6a so that the substrate 40 can not slide to the
admission terminal 31a either.
[0038] The lower expanding room 11a is communicated with the engine
through an intake 17a which is arranged on the lower cover 15a, as
shown in FIGS. 8 and 9, to connect the exhausting route 10a. The
upper expanding room 12a is communicated with the environment
through an outtake 18a arranged on the upper cover 16a. A plurality
of through holes 42 of the substrate 40 are communicated between
the admission terminal 31a and the exhaust terminal 32a of the
catalyst mantle 3a (as shown in FIG. 10). The block 5a also has at
least one exhaust hole 51a formed thereon to be communicated with
each of the through holes 42 and the upper expanding room 12a. The
block 5a is a baring pole 52a integrated on the clapboard 2a or the
exhaust terminal 32a of the catalyst mantle 3a. The baring pole 52
may be intersecting-shaped, arc-shaped, or fin-shaped (as shown in
FIGS. 2, 3, 4 and 5). The stopper 6a is a curved stopping strip 61
with two ends welded on the inner wall 19a of the muffler 1a and a
crowning for the substrate 40 resting thereon. Other elements are
same to those of the first preferred embodiment.
[0039] When the engine starts to operate, the waste gas produced by
the engine is guided into the lower expanding room 11a of the
muffler 1a through the exhausting route 10a and the intake 17a (as
shown in FIG. 9). Then the waste gas is guided through the stopper
6a and into the plurality of through holes 42 of the substrate 40
through the admission terminal 31a of the catalyst mantle 3a (as
shown in FIG. 10), and then is guided into the upper expanding room
12a through the exhaust hole 51a of the block 5a and the exhaust
terminal 32a of the catalyst mantle 3a, and later is exhausted to
the environment through the outtake 18a. During the operation, the
waste gas makes a redox reaction with the catalyst arranged on the
flat foil 4 and the corrugated foil 41 when the waste gas passes
through the plurality of through holes 42. At the same time, the
waste gas blows the substrate 40 to make the substrate 40 sliding
to the exhaust terminal 32a of the catalyst mantle 3a; however, the
substrate 40 is restricted between the baring pole 52a of the block
5a and the stopper 6a. Others are same to those of the first
preferred embodiment.
[0040] Furthermore, as shown in FIG. 11, the stopper 6a can be
directly formed as a crowning portion 62a of the inner wall 19a of
the muffler 1a for the substrate 40 resting thereon. Others are
same to those of the second preferred embodiment.
[0041] The above description is given by way of example, and not
limitation. Given the above disclosure, one skilled in the art
could devise variations that are within the scope and spirit of the
invention disclosed herein, including configurations ways of the
recessed portions and materials and/or designs of the attaching
structures. Further, the various features of the embodiments
disclosed herein can be used alone, or in varying combinations with
each other and are not intended to be limited to the specific
combination described herein. Thus, the scope of the claims is not
to be limited by the illustrated embodiments.
* * * * *