CN1281936A - Exhaust gas pollution controller - Google Patents
Exhaust gas pollution controller Download PDFInfo
- Publication number
- CN1281936A CN1281936A CN00118737A CN00118737A CN1281936A CN 1281936 A CN1281936 A CN 1281936A CN 00118737 A CN00118737 A CN 00118737A CN 00118737 A CN00118737 A CN 00118737A CN 1281936 A CN1281936 A CN 1281936A
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- China
- Prior art keywords
- catalyst carrier
- connecting tube
- cylindrical shell
- casing
- downstream
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003054 catalyst Substances 0.000 claims abstract description 102
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 31
- 230000030279 gene silencing Effects 0.000 claims description 16
- 239000007789 gas Substances 0.000 description 30
- 230000004913 activation Effects 0.000 description 10
- 238000005192 partition Methods 0.000 description 10
- 239000002912 waste gas Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
- F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
An exhaust emission control device for an engine, in which a cylindrical catalyst case for holding a catalyst support is disposed in a cylinder. The cylinder includes a tapered portion having a small diameter end connecting to a connecting pipe which connects to a discharge pipe, and a cylindrical portion connecting the a large diameter end of the tapered portion. The catalyst case is supported by the cylindrical portion, characterized in that the diameter of a catalyst support is larger than the outer diameter of the connecting pipe. The upstream of the catalyst support opposites to the downstream of the connecting pipe, which enters the cylinder from the small diameter end of the tapered portion, in which position the downstream of the connecting pipe opposites to the upstream of the catalyst support, and has space therebetween.
Description
The present invention relates to a kind of exhaust gas pollution controller of engine, wherein, one catalyst carrier is arranged in the cylindrical shell, this cylindrical shell comprises a tapered segment and a column part, the minor diameter that this tapered segment has a connecting tube that is connected to outlet pipe is with from the engine exhaust gas routing, and this column part is connected to the larger diameter end of described tapered segment; Described catalyst carrier has the rounded outer surface of diameter greater than described connecting tube external diameter; The upstream extremity of this catalyst carrier is facing to the downstream of described connecting tube, and the cylinder shape catalyst casing that wherein holds catalyst carrier is placed in the described column part; Described catalyzer casing passes through a supports support by described column part.
Such exhaust gas pollution controller for example, discloses in speciallyying permit the Japanese Utility Model that publication number is clear 55-135118 by known, and the downstream that wherein is connected to the connecting tube of an outlet pipe is connected to the smaller diameter end of the tapered segment of a casing.Further, be to have disclosed exhaust gas pollution controller this feature in the structure of being maintained fixed in the Japanese Utility Model of flat 4-87323 at the special permission publication number at the catalyzer casing.
By the way, in a engine that is installed in motorcycle or the analog with little displacement, in order to be elevated to its activation temperature rapidly by the temperature of the catalyzer of catalyst carrier carrying, make between engine and the catalyst carrier distance as far as possible weak point be effective.In above-mentioned exhaust gas pollution controller, if the distance between engine and the catalyst carrier is short as much as possible, then the axial distance of outlet pipe and connecting tube just becomes shorter., because the axial distance of outlet pipe and connecting tube shortens, its output torque just reduces in the low speed rotation scope of engine, so it is desirable that the axial distance of outlet pipe and connecting tube is provided with longly.In order to solve this trouble, can consider the unlimited angle of the tapered segment of cylindrical shell is done greatly, shorten the distance between engine and the catalyst carrier with the axial distance that replace to prolong outlet pipe and connecting tube, in this case, because the downstream of outlet pipe is reduced near the upstream extremity of catalyst carrier and the volume of described tapered segment, thus when the engine high load is worked the flowing resistance of catalyst carrier by deterioration.
Consider that aforesaid problem has designed the present invention, first purpose of the present invention has provided a kind of exhaust gas pollution controller of engine, this device can the temperature with catalyzer raise a primary stage, avoid in the low speed rotation scope of motor, reducing the output torque of engine simultaneously, and also can when the engine high load is worked, avoid the deterioration of catalyst carrier flowing resistance.
There are many problems in disclosed prior art exhaust gas pollution controller among the flat 4-87323 of Japanese Utility Model.Because some corresponding supports support are passed through by the column part of a cylindrical shell in catalyzer casing two ends along its length, so need be provided for two supporting elements of support catalyst casing in described column part, just increased the quantity of these parts thus, further, area of heat transfer between described catalyzer casing and column part becomes relatively large, so catalyzer is subject to the influence of external temperature.
Consider foregoing problems, second purpose of the present invention provided a kind of exhaust gas pollution controller of engine, and this device can support a catalyzer casing by the column part of a cylindrical shell, prevents that simultaneously catalyzer is subjected to the influence of external temperature.
In order to reach above-mentioned first purpose, according to the present invention program's 1 described invention, a kind of exhaust gas pollution controller of engine is provided, a cylinder shape catalyst casing that wherein is used to install catalyst carrier is arranged in the cylindrical shell, this cylindrical shell comprises a tapered segment and a column part, the smaller diameter end that this tapered segment has a connecting tube that is connected to outlet pipe is with from the engine exhaust gas routing, and this column part is connected to the larger diameter end of described tapered segment; Described catalyzer casing passes through a supports support by described column part; Described catalyst carrier has the rounded outer surface of diameter greater than described connecting tube external diameter; The upstream extremity of this catalyst carrier is facing to the downstream of described connecting tube, this exhaust gas pollution controller is characterised in that, the downstream of described connecting tube enters into a position in the described cylindrical shell from the smaller diameter end of described tapered segment, face toward the upstream extremity of described catalyst carrier in the downstream of this described connecting tube in position, and between them, leave certain interval.
With regard to this shape structure, even make the distance between engine and the described catalyst carrier short as far as possible, so that the temperature with catalyzer is elevated to its activation temperature rapidly, also can under the situation that does not strengthen the unlimited angle of tapered segment, eliminate needs to the axial distance that shortens outlet pipe and connecting tube, therefore, in a low speed rotation scope of engine, can prevent reducing of its output torque, and also can be by making that the volume of tapered segment is relatively big and when engine E high load is worked, utilizing this tapered segment to prevent damage to the catalyst carrier flowing resistance as a buffer cell.
According to the present invention program 2 described the present invention, except the structure of the present invention that scheme 1 is described, the internal diameter of described at least connecting tube downstream is configured to the internal diameter less than described outlet pipe.With regard to this structure, because waste gas flows to the core of described catalyst carrier from connecting tube, so the temperature of the catalyzer that can rapidly the catalyst carrier core be carried along with the startup of engine is elevated to its activation temperature.
In order to reach second above-mentioned purpose, according to the present invention program 3 described the present invention, a kind of exhaust gas pollution controller of engine is provided, a cylinder shape catalyst casing that wherein is used to install catalyst carrier is arranged in the cylindrical shell, this cylindrical shell comprises a tapered segment and a column part, the smaller diameter end that this tapered segment has a connecting tube that is connected to outlet pipe is with from the engine exhaust gas routing, and this column part is connected to the larger diameter end of described tapered segment; Described catalyzer casing passes through a supports support by described column part; Described catalyst carrier has the rounded outer surface of diameter greater than described connecting tube external diameter; The upstream extremity of this catalyst carrier is facing to the downstream of described connecting tube, this exhaust gas pollution controller is characterised in that, described supporting element comprises that is slidably mounted in the support cylinder body on the part relatively, this part extends to an one intermediate point from an end of described catalyzer casing along its length, and an end of this support cylinder body is fixed on the end of described catalyzer casing; And flange stretches out from the other end radially outward of described support cylinder body; The outer periphery of described flange is fixed to the internal surface of cylindrical shell column part.
With regard to this structure, because an end of described catalyzer casing is fixed to an end of the support cylinder body of described supporting element, described supporting element is fixed to the column part of described cylindrical shell and extends on the part of an intermediate point from catalyzer casing one end along its length, but be installed in the described support cylinder to described catalyzer casing slide relative, so the catalyzer casing can be supported in the column part of described cylindrical shell, allow the catalyzer casing owing to its thermal expansion is out of shape by an independent supporting element simultaneously.Because the simple shape that is shaped as described supporting element just can reduce its quantity of parts in addition, thereby reduces its manufacture cost.Because the outer periphery of described flange is being protruded with the other end radially outward along the corresponding position of an intermediate portion of the length direction of catalyzer casing from the support cylinder body and is being fixed on the column part of described cylindrical shell, so described supporting element is fixed on the described column part at the position of centre of gravity near each catalyst carrier and catalyzer casing, be applied to stress influence on the described supporting element so that can eliminate at least vibration owing to catalyst carrier and catalyzer casing.Further, because at the area of heat transfer of the column part of cylindrical shell and the heat transfer pathway between the catalyzer casing area less than the device that adopts many supporting elements in the prior art, so, can prevent that catalyzer is subjected to the influence of external temperature, especially, can more effectively be prevented to be subjected to the influence of external temperature by the part of the catalyzer of the part (not being coupled to the part of the support cylinder body of described supporting element) of catalyzer casing carrying.As a result, the further temperature of rugged catalyst.
According to the present invention program 4 described the present invention, except scheme 3 described structures of the present invention, the inside of described cylindrical shell is divided into many expansion chamber vertically forming a silencing apparatus, and the expansion chamber that the expansion chamber that faces toward of the upstream extremity of described catalyst carrier and catalyst carrier downstream face toward is separated by described flange.With regard to this structure, because a part that provides described cylindrical shell and described exhaust gas pollution controller to constitute silencing apparatus jointly for exhaust gas pollution controller and silencing apparatus, so can reduce the quantity of silencer component and the size and the weight of silencing apparatus.
One embodiment of the present of invention are described below with reference to the accompanying drawings.
Fig. 1 is the right elevation of a motorcycle;
Fig. 2 is the longitudinal cross-section view of an exhaust gas pollution controller and a silencing apparatus;
Fig. 3 is the enlarged view of a major component among Fig. 2;
Fig. 4 is the sectional drawing of cutting open along Fig. 3 section line 4-4;
Fig. 5 represents the variation according to the throttling ratio of a connecting tube, at the temperature variation curve of the carrier of catalyst carrier core.
Referring to Fig. 1, the body frame F of spine formula motorcycle comprises an also downward-sloping backward spine 5 and the back vehicle frame 6 that is welded to these spine 5 rear ends of being made by steel plate made by steel pipe.Supporting the front fork 8 of front-wheel WF rotationally can be handled and rotatably support at the top pipe 7 that the front end of described spine 5 provides by one.The back vent 10 that supports a trailing wheel WR is rotationally rotatably supported by described back vehicle frame 6.Between back vent 10 and back vehicle frame 6, provide a rear shock absorber 11.A saddle seat 12 is installed in the upper surface of described back vehicle frame 6.One fuel tank 13 is placed in the back vehicle frame 6 and is located immediately at the below of described saddle seat 12.The crankcase 14 of engine E is installed in the front end of described back vehicle frame 6, and below the attachment portion between back vehicle frame 6 front ends and the spine 5.
An air filter 15 is installed in the front end of described spine 5.This air filter 15 is connected to a suction port (not shown), a throttle body and a suction tude 19, and this suction port is provided in the cylinder head 16 of engine E by a flaring pipe 17.A fuel injection valve 20 that injects fuel into described suction port is installed in the intermediate portion of described suction tude 19.
Be connected to a relief opening that provides than the bottom from the upstream extremity of an outlet pipe 21 of described engine E exhaust gas routing at described cylinder head 16.The downstream of described outlet pipe 21 is connected to 24 and one in a tube that is provided at usually on the exhaust gas pollution controller 22 and is set on the silencing apparatus 23 on right side, vehicle frame F rear section.
Referring to Fig. 2 and Fig. 3, tube 24 comprises column part 25, tapered segment 26 and end wall 27, and described tapered segment 26 has a coaxial larger diameter end that is connected of the end with described column part 25, and described end wall 27 is fixed on the other end of described column part 25.Exhaust gas pollution controller 22 has a catalyst carrier 28 and is placed on the position of close one end in the described tube 24, and this catalyst carrier 28 and column part 25 coaxial settings.
Referring to Fig. 4, described catalyst carrier 28 is shaped as a cellular cylindrical body especially, this cellular cylindrical body have a rounded outer surface and with described tube 24 coaxial extensions.More particularly, described catalyst carrier 28 by with one flat plate 29 and corrugated board 30 overlapped together and spirality its winding is made, described each piece plate all is to be made by stainless steel.The catalyzer (not shown) is supported by catalyst carrier 28.
Described catalyst carrier 28 is placed in the casing 31, and this casing is particularly made by stainless steel by making with the material identical materials of making catalyst carrier 28.More particularly, catalyzer casing 31 is shaped as the cylindrical shape longer than the shape of catalyst carrier 28.This catalyst carrier 28 is engaged in the casing 31, and its two ends are from the inward at both ends setting of casing 31.In a kind of like this mated condition, described catalyst carrier 28 is soldered on the described catalyzer casing.Catalyzer casing 31 is arranged in the column part 25 with one heart, and its end along its length puts in the described cone 26, and this casing 31 is supported in the described column part 25 by a supporting element 32.
Described supporting element 32 comprises a support cylinder body 32a, a flange 32b and an installation cylindrical body 32c, they each other integral body form.But be installed in the part of this catalyzer casing 31 to support cylinder body 32a slide relative, it extends to middle from an end of casing along its length.Flange portion 32b stretches out from the other end radially outward of described support cylinder body 32a.Cylindrical body 32c is installed to be extended to the outer periphery of described flange 32b and is mounted the internal surface that is engaged in described column part 25.Described supporting element 32 is generally made by stainless steel by making with the material identical materials of making catalyst carrier 28 and catalyzer casing 31.
The end of support cylinder body 32a is welded on an end of described catalyzer casing 31 regularly.In this case, be welded to an end of the catalyzer casing 31 that stretches out from an end of catalyst carrier 28, be applied to the thermal effect on the catalyzer that supports by catalyst carrier 28 in the time of will avoiding welding as far as possible by a end with support cylinder body 32a.The outer periphery that described installation cylindrical body 32c is flange 32b is welded on the internal surface of the column part 25 of described cylindrical shell 24 regularly.
In addition, if the temperature of waste gas is high relatively, then may need the fixedly welding portion between an end of the end of support cylinder body 32a and catalyzer casing 31 is arranged on as described upstream side in the present embodiment; , if the temperature of waste gas is low relatively, especially, the activation temperature of a little higher than described catalyzer then may need described fixedly welding portion is arranged on the downstream side.More particularly, when along with the startup of engine E from engine E exhaust gas discharged from upstream side during to downstream side inflow catalyst carrier 28, the catalytic reaction that produces when reaching its activation temperature by temperature when catalyzer, the temperature sequence ground of catalyst carrier 28 raises from upstream side, and the temperature of described thus catalyzer casing 31 raises in proper order from described upstream extremity.In this case, be welded to the upstream extremity of catalyzer casing 31 regularly by a end with the support cylinder body 32a of supporting element 32, just can prevent this fixedly welding portion bear the overstress that produces owing to different thermal expansions.So under the high relatively situation of exhaust gas temperature, the end of support cylinder body 32a is welded on the upstream extremity of described catalyzer casing 31 regularly.On the other hand, because 24 through supporting element 32 generation heat transmission from catalyzer casing 31 to cylindrical shell, if so when low relatively in exhaust gas temperature, particularly under the situation of the activation temperature of a little higher than catalyzer, and when the end of support cylinder body 32a is welded to the upstream extremity of catalyzer casing 31 regularly, the rising of this catalyst temperature thus, has postponed the beginning of catalytic reaction owing to the heat transmission to cylindrical shell 24 is delayed through supporting element 32 from catalyzer casing 31.So, under the low relatively situation of exhaust gas temperature, wish the end of described support cylinder body 32a fixedly is welded to the downstream of catalyzer casing 31.
Smaller diameter end at the tapered segment 26 of cylindrical shell 24 provides a lid 33.A connecting tube 34 covers the 33 coaxial smaller diameter end that are connected tapered segment 26 by this.The downstream of outlet pipe 21 and described 34 coaxial connections of connecting tube.
Connecting tube 34 comprises in an outer tube 35 and one manages 36.Interior pipe 36 inserts outer tubes 35, and its two ends are protruding from the two ends of described outer tube 35, and pipe 36 is welded on the described outer tube 35 regularly in this.The downstream of connecting tube 34, the downstream of pipe 36 is passed and is covered 33 small diameter cylinders body 33a promptly, and be inserted into described cylindrical shell 24 interior positions from the smaller diameter end of tapered segment 26, downstream at the described connecting tube 34 in this position is relative with the upstream extremity of catalyst carrier 28, and leaves a L at interval between them.In this state, the intermediate portion of described outer tube 35 is welded on the described lid 33 regularly.
The outside diameter of interior pipe 36 is arranged in the described outlet pipe 21 with certain length of thread engagement.The upstream extremity of interior pipe 36 is engaged in the downstream of described outlet pipe 21, and the downstream of outlet pipe 21 is welded to the upstream extremity of described outer tube 35 regularly.
In this state, the inside diameter D 1 of interior pipe 36 promptly is set to littler than the inside diameter D 2 of outlet pipe 21 at the connecting tube 34 of downstream one side (in the present embodiment on whole length) at least.As a result, before the waste gas of outlet pipe 21 is in being led to cylindrical shell 24, be limited in the connecting tube 34.
Because the downstream of connecting tube 34 is limited at least as mentioned above, so waste gas flows to the core of catalyst carrier 28 from connecting tube 34.As a result, the temperature by the catalyzer of the core of catalyst carrier 28 carrying can be raise rapidly along with the startup of engine E.Fig. 5 represents that the catalyst temperature of core of catalyst carrier 28 is along with the change curve of the variation of ratio (D2-D1)/D2.When ratio (D2-D1)/D2 less than 0.05 the time, can not realize that the concentrated area is directed to the effect of catalyst carrier 28 cores with exhaust flow, the result is sufficient in the rising of the central part office of catalyst carrier 28 catalyst temperature.Meanwhile, when ratio (D2-D1)/D2 greater than 0.4 the time, waste gas too is limited and has reduced exhausted air quantity thus, also is inadequate in the rising of the central part office of catalyst carrier 28 catalyst temperature.So, ratio (D2-D1)/D2 is arranged on scope 0.05≤(D2-D1)/D2≤0.4th, desirable.
With regard to the interval L between the upstream extremity of the downstream of connecting tube 34 above-mentioned and catalyst carrier 28, if L is too short at interval, the local metamorphism of catalyzer then can appear, if at interval L is too big, just can not realize the effect of the rapid rising of the catalyst temperature that carries along with the central part office that is enabled in catalyst carrier 28 of engine E.From practical point of view, described interval L can be set in the scope of 0.5 * D1 to 5 * D1, is preferably disposed in the scope of 0.5 * D1 to 3 * D1.
See Fig. 2 again, silencing apparatus 23 is to be divided into first expansion chamber 37, second expansion chamber 38, the 4th expansion chamber 40 and the 3rd expansion chamber 39 by the inside with cylindrical shell 24 to be formed, and described these chambers axially are provided with from described upstream extremity with this order.The position of first expansion chamber 37 between the flange 32b of cylindrical shell 24 female cone parts 26 and supporting element 32 forms by this way, that is, and and in the upstream face of catalyst carrier 28 mode to first expansion chamber 37.
A cylindrical body 41 is inserted into the latter half part in downstream side of the column part 25 of described cylindrical shell 24, and between the internal surface of described cylindrical body 41 and column part 25, is provided with a little gap.The many protruding 41a that provides at the upstream extremity of cylindrical body 41 and be welded on the internal surface of described column part 25 at the many protruding 41b that the downstream of cylindrical body 41 provides regularly.
A partition wall 43 and the position described end wall 27 between of the 3rd expansion chamber 39 in described cylindrical shell 24 forms.The outer periphery of partition wall 43 is fixed on the internal surface near the downstream end position of described cylindrical body 41.Form on the position between the partition wall 42 and 43 of the 4th expansion chamber 40 in described cylindrical shell 24.
By a pair of connecting tube 44, the described second and the 3rd expansion chamber 38 and 39 is interconnected, and the two ends of these connecting tube 44 are supported by partition wall 42 and 43.By a pair of connecting tube 45 of being supported by partition wall 43, described third and fourth expansion chamber 39 and 40 is interconnected.An independent discharge pipe 46 is fixed on described partition wall 43 and the end wall 27, and passes the core of this partition wall 43 and end wall 27 simultaneously, and the upstream extremity of described discharge pipe 46 opens wide towards the 4th expansion chamber 40, and its downstream is opened wide towards the outside.Waste gas finally gives off from discharge pipe 46.
The effect of present embodiment will be described below.Being connected to outlet pipe 21 is used for smaller diameter end from the downstream of the connecting tube 34 of engine E exhaust gas routing from the tapered segment 26 of cylindrical shell 24 and protrudes out a position in the cylindrical shell 24, face toward the upstream extremity of catalyst carrier 28 in the downstream of this connecting tube 34 of this position, and leave certain interval between them.So, even the distance between engine E and the catalyst carrier is as far as possible little, so that the temperature of catalyzer is elevated to its activation temperature rapidly, also can under the situation of the unlimited angle that does not strengthen tapered segment 26, eliminate needs to the axial distance that shortens outlet pipe 21 and connecting tube 34.The result, in the low speed rotation scope of engine E, can prevent reducing of output torque, and also can be by making that the volume (i.e. the volume of first expansion chamber 37) of tapered segment 26 is bigger and when engine E high load is worked, utilizing first expansion chamber 37 to prevent damage to the flowing resistance of catalyst carrier 28 as a buffer cell.
Because the inside diameter D 1 of the downstream of connecting tube 34 is configured to the inside diameter D 2 less than outlet pipe 21 at least, so waste gas flows to the core of catalyst carrier 28 from connecting tube 34.As a result, the temperature of catalyzer that is carried on the core of catalyst carrier 28 can be elevated to its activation temperature rapidly along with the startup of engine E.
The cylinder shape catalyst casing 31 that holds the catalyst carrier 28 that is loaded with catalyzer is arranged in the column part 25 of cylindrical shell 24 coaxially, and be supported in this column part 25 by a supporting element 32, wherein, but supporting element 32 is engaged in the support cylinder body 32a on the part of catalyzer casing 31 with comprising slide relative, in the middle of this cylindrical body extends to it from an end of casing along its length, and the end of this support cylinder body 32a is fixed to an end of described catalyzer casing 31, this supporting element 32 also comprises a flange 32b, this flange outwards protrudes out from the other end of described support cylinder body 32a, and makes its outer periphery (being installation cylindrical body 32c in the present embodiment) be fixed to the internal surface of described column part 25.As a result, just this catalyzer casing 31 can be supported in the column part 25 of casing 24 distortion that allows this catalyzer casing 31 to cause simultaneously by an independent supporting element 32 owing to its thermal expansion.Further, because the simple shape of supporting element 32, so, can reduce the quantity that needs support the parts of described catalyzer casing 31, can reduce manufacture cost thus.
Owing to be fixed on the column part 25 of cylindrical shell 24 from the outer periphery of the outward extending flange 32b of the other end of support cylinder body 32a in the position of going up along its length, so supporting element 32 is fixed on the described column part 25 at the position of centre of gravity near catalyst carrier 28 and catalyzer casing 31 corresponding to an intermediate portion of catalyzer casing 31.As a result, can eliminate at least vibration owing to catalyst carrier 28 and catalyzer casing 31 and be applied to stress influence on the described supporting element 32.
Owing in one type of prior art syringe, adopt many supporting elements at the column part 25 of cylindrical shell 24 and the heat transfer regions of the transmission of the heat between the catalyzer casing 31 passage, so, can prevent that catalyzer is subjected to the influence of external temperature, especially, can more effectively be prevented to be subjected to the influence of external temperature by the part of the catalyzer of the part (not being coupled to the part of the support cylinder body 32a of described supporting element 32) of catalyzer casing 31 carrying.As a result, further rugged catalyst temperature.
Because silencing apparatus 23 is to form by vertically the inside of cylindrical shell 24 being divided into many expansion chamber 37-40, and right second expansion chamber 38 of right first expansion chamber 37 of the upstream face of described catalyst carrier 28 and the downstream end face of this catalyst carrier 28 separates by the flange 32b of supporting element 32, so, by described cylindrical shell 24 is used on exhaust gas pollution controller 22 and the silencing apparatus 23 jointly, this exhaust gas pollution controller 22 has constituted the part of this silencing apparatus 23.As a result, can reduce the quantity of silencing apparatus 23 parts and the volume and weight of minimizing silencing apparatus 23.
Although described one embodiment of the present of invention in detail, the present invention is not limited to this, is understood that under the prerequisite that does not exceed claim protection domain of the present invention, can carry out various modifications to design of the present invention.
For example, although exhaust gas pollution controller 22 and silencing apparatus 23 are integral in a common cylindrical shell 24 in the above-described embodiments each other, can apply the present invention to separate on the exhaust gas pollution controller that provides with silencing apparatus 23.
For example, can omit the installation cylindrical body 32c of supporting element 32, and the outer periphery of flange 32b is fixed directly to the internal surface of the column part 25 of cylindrical shell 24; Although catalyst carrier 28 is welded direct on the catalyzer casing 31 of the foregoing description, also can fixes by a mesh portion this catalyst carrier 28 is installed by described catalyzer casing 31.
As mentioned above, according to scheme 1 described the present invention, even make the distance between engine and the catalyst carrier short as far as possible so that the temperature of catalyzer is elevated to its activation temperature rapidly, also can under the situation that does not increase the unlimited angle of tapered segment, eliminate shortening the needs of distance between outlet pipe and the connecting tube vertically, thereby prevent from the low speed rotation scope of engine, to reduce the output torque of engine, also by the volume of tapered segment being made bigger and when the engine high load is worked, being utilized this tapered segment to prevent destruction to the catalyst carrier flowing resistance as buffer cell.
According to as scheme 2 described the present invention, along with the startup of engine can be elevated to its activation temperature rapidly with the catalyst temperature of catalyst carrier central part office carrying.
As mentioned above, according to scheme 3 described the present invention, can the catalyzer casing be supported in the column part of cylindrical shell by single supporting element, the distortion that allows this catalyzer casing to cause simultaneously owing to its thermal expansion, thus reduce number of components and reduce fabricating cost.Because described supporting element is fixed in the column part position near the catalyst carrier and the catalyst tank body weight heart, so, can eliminate at least vibration owing to catalyst carrier and catalyzer casing and be applied to stress influence on the described supporting element.Further, can prevent that catalyzer is subjected to the influence of external temperature, especially, can more effectively be prevented to be subjected to the influence of external temperature by the part of the catalyzer of the part (not being coupled to the part of the support cylinder body of described supporting element) of catalyzer casing carrying.As a result, further rugged catalyst temperature.
According to scheme 4 described the present invention, can reduce the quantity of silencer component and reduce the size and the weight of silencing apparatus.
Claims (4)
1. engine exhaust pollution control device, a cylinder shape catalyst casing (31) that wherein is used to install catalyst carrier (28) is arranged in the cylindrical shell (24), this cylindrical shell comprises a tapered segment (26) and a column part (25), the smaller diameter end that this tapered segment has a connecting tube (34) that is connected to outlet pipe (21) is with from engine (E) exhaust gas routing, and this column part is connected to the larger diameter end of described tapered segment (26); Described catalyzer casing (31) is supported by a supporting element (32) by described column part (25); Described catalyst carrier (28) has the rounded outer surface of diameter greater than described connecting tube (34) external diameter; The upstream extremity of this catalyst carrier (28) is facing to the downstream of described connecting tube (34), described exhaust gas pollution controller is characterised in that, the downstream of described connecting tube (34) enters into an interior position of described cylindrical shell from the smaller diameter end of described tapered segment (26), face toward the upstream extremity of described catalyst carrier (28) in the downstream of the described connecting tube in this position (34), and between them, leave certain interval.
2. an engine exhaust pollution control device as claimed in claim 1 is characterized in that, the internal diameter of described at least connecting tube (34) downstream is configured to the internal diameter less than described outlet pipe (21).
3. engine exhaust pollution control device, a cylinder shape catalyst casing (31) that wherein is used to install catalyst carrier (28) is arranged in the cylindrical shell (24), this cylindrical shell comprises a tapered segment (26) and a column part (25), the smaller diameter end that this tapered segment has a connecting tube (34) that is connected to outlet pipe (21) is with from engine (E) exhaust gas routing, and this column part (25) is connected to the larger diameter end of described tapered segment (26); Described catalyzer casing (31) is supported by a supporting element (32) by described column part (25); Described catalyst carrier (28) has the rounded outer surface of diameter greater than described connecting tube (34) external diameter; The upstream extremity of this catalyst carrier (28) is facing to the downstream of described connecting tube (34), described exhaust gas pollution controller is characterised in that, described supporting element (32) comprises a support cylinder body (32a) on the part that is slidably mounted in described catalyzer casing (31) relatively, this part extends to an one intermediate point from an end of described catalyzer casing (31) along its length, and an end of this support cylinder body (32a) is fixed on the end of described catalyzer casing (31); A flange (32b) stretches out from the other end radially outward of described support cylinder body (32a); The outer periphery of described flange (32b) is fixed to the internal surface of cylindrical shell (24) column part (25).
4. engine exhaust pollution control device as claimed in claim 3, it is characterized in that, the inside of described cylindrical shell (24) is divided into many expansion chamber (37-40) vertically forming a silencing apparatus (23), and the upstream extremity of described catalyst carrier (28) expansion chamber (37) that faces toward and the expansion chamber (38) that catalyst carrier (28) downstream faces toward are separated by described flange (32b).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11180119A JP2001012236A (en) | 1999-06-25 | 1999-06-25 | Exhaust emission purifier of engine |
| JP180119/1999 | 1999-06-25 | ||
| JP18012099A JP4331826B2 (en) | 1999-06-25 | 1999-06-25 | Engine exhaust system |
| JP180120/1999 | 1999-06-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1281936A true CN1281936A (en) | 2001-01-31 |
| CN1129705C CN1129705C (en) | 2003-12-03 |
Family
ID=26499756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00118737A Expired - Fee Related CN1129705C (en) | 1999-06-25 | 2000-06-23 | Exhaust gas pollution controller |
Country Status (6)
| Country | Link |
|---|---|
| CN (1) | CN1129705C (en) |
| ES (1) | ES2181537B1 (en) |
| ID (1) | ID26423A (en) |
| IT (1) | IT1320440B1 (en) |
| MY (1) | MY136541A (en) |
| TW (1) | TW530115B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050718B (en) * | 2006-04-05 | 2012-01-25 | 中川产业株式会社 | Exhaust pipe of vehicle |
| CN106677872A (en) * | 2016-12-15 | 2017-05-17 | 江苏大学 | Purification silencer for R180 single-cylinder swirl chamber diesel engine |
| CN109891066A (en) * | 2016-10-27 | 2019-06-14 | 本田技研工业株式会社 | Exhaust pipe |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04175418A (en) * | 1990-11-07 | 1992-06-23 | Ebara Corp | Catalyst incorporating silencer |
| EP0500105B1 (en) * | 1991-02-22 | 1996-09-18 | Yamaha Hatsudoki Kabushiki Kaisha | Motor cycle with exhaust gas arrangement |
| DE4440160C2 (en) * | 1993-12-03 | 1997-02-27 | Gen Motors Corp | Catalyst diffuser |
-
2000
- 2000-05-23 TW TW089109903A patent/TW530115B/en not_active IP Right Cessation
- 2000-06-16 IT IT2000TO000580A patent/IT1320440B1/en active
- 2000-06-22 MY MYPI20002823A patent/MY136541A/en unknown
- 2000-06-22 ES ES200001563A patent/ES2181537B1/en not_active Expired - Fee Related
- 2000-06-23 CN CN00118737A patent/CN1129705C/en not_active Expired - Fee Related
- 2000-06-23 ID IDP20000513D patent/ID26423A/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050718B (en) * | 2006-04-05 | 2012-01-25 | 中川产业株式会社 | Exhaust pipe of vehicle |
| CN109891066A (en) * | 2016-10-27 | 2019-06-14 | 本田技研工业株式会社 | Exhaust pipe |
| CN109891066B (en) * | 2016-10-27 | 2021-10-08 | 本田技研工业株式会社 | Exhaust pipe |
| CN106677872A (en) * | 2016-12-15 | 2017-05-17 | 江苏大学 | Purification silencer for R180 single-cylinder swirl chamber diesel engine |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2181537A1 (en) | 2003-02-16 |
| ID26423A (en) | 2000-12-28 |
| ES2181537B1 (en) | 2004-04-01 |
| MY136541A (en) | 2008-10-31 |
| CN1129705C (en) | 2003-12-03 |
| TW530115B (en) | 2003-05-01 |
| ITTO20000580A1 (en) | 2001-12-16 |
| ITTO20000580A0 (en) | 2000-06-16 |
| IT1320440B1 (en) | 2003-11-26 |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
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Granted publication date: 20031203 |