CN100443701C - Exhaust gas purification device - Google Patents
Exhaust gas purification device Download PDFInfo
- Publication number
- CN100443701C CN100443701C CNB2006100820330A CN200610082033A CN100443701C CN 100443701 C CN100443701 C CN 100443701C CN B2006100820330 A CNB2006100820330 A CN B2006100820330A CN 200610082033 A CN200610082033 A CN 200610082033A CN 100443701 C CN100443701 C CN 100443701C
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- Prior art keywords
- outlet pipe
- secondary air
- silencing apparatus
- air supply
- exhaust
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- 238000000746 purification Methods 0.000 title 1
- 239000003054 catalyst Substances 0.000 claims abstract description 27
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 23
- 238000007599 discharging Methods 0.000 claims abstract description 14
- 230000030279 gene silencing Effects 0.000 claims description 103
- 230000005764 inhibitory process Effects 0.000 claims description 18
- 238000010276 construction Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 abstract description 59
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 10
- 239000001301 oxygen Substances 0.000 abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 abstract description 10
- 230000003584 silencer Effects 0.000 abstract 2
- 239000003570 air Substances 0.000 description 153
- 230000004888 barrier function Effects 0.000 description 13
- 230000002093 peripheral effect Effects 0.000 description 8
- 230000004913 activation Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000007689 inspection Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Exhaust Gas After Treatment (AREA)
Abstract
The present invention provides an exhaust emission control device capable of suppressing the lowering of an oxygen amount flowing into an exhaust pipe by preventing a secondary air feed pipe from being heated by a hot exhaust gas. This exhaust emission control device 20 comprises an exhaust pipe 15 connected to an engine, a catalyst 22 disposed in the exhaust pipe 15, the secondary air feed pipe 23 connected to the exhaust pipe 15 on the upstream side of a position where the catalyst 22 is disposed, and a silencer 30 storing a connected portion of the secondary air feed pipe 23 to the exhaust pipe 15 and the end part 15i of the exhaust pipe 15 discharging exhaust gases. The silencer 30 comprises a circulation suppressing member (inner wall member 35) suppressing the circulation of the exhaust gases disposed between the end part 15i and the connected portion of the exhaust pipe 15.
Description
Technical field
The present invention relates to a kind of Exhaust gas purifying device, the exhaust of discharging from motor in this device mixes with secondary air and is cleaned.
Background technique
Usually, in motorcycle, be provided with Exhaust gas purifying device, in the outlet pipe that catalyzer is arranged on motor links to each other in this Exhaust gas purifying device, the SAS Secondary Air Supply pipe is connected with the upstream extremity of catalyzer, to allow secondary air and exhaust to mix, thereby make catalyst activation (for example, patent documentation 1).Yet for traditional Exhaust gas purifying device, the joint of outlet pipe and SAS Secondary Air Supply pipe is exposed to the outside.Therefore, worry because the heat of exhaust of the outlet pipe of flowing through makes the coating that is coated on the joint worsen, thereby disfeature.
Therefore, it is contemplated that a kind of like this Exhaust gas purifying device, in this Exhaust gas purifying device, the SAS Secondary Air Supply pipe is introduced in the silencing apparatus, and the joint of outlet pipe and SAS Secondary Air Supply pipe is contained in the silencing apparatus, thereby prevents that joint is exposed to the outside.
Patent documentation 1: Japanese Utility Model registration No.2504008.
But, introduce Exhaust gas purifying device in the silencing apparatus for this SAS Secondary Air Supply pipe, when the high-temperature exhaust air of discharging from the end of outlet pipe during directly to the SAS Secondary Air Supply pipe inspection, the SAS Secondary Air Supply pipe is overheated.In this case, the flow through air of SAS Secondary Air Supply pipe inside is heated and volumetric expansion in flow process.Therefore, worry that the oxygen volume that flows into outlet pipe reduces.
Summary of the invention
In light of this situation, the object of the present invention is to provide and a kind ofly can prevent high-temperature exhaust air heating SAS Secondary Air Supply pipe and suppress to flow into the Exhaust gas purifying device that the amount of the oxygen of outlet pipe reduces.
In order to address the above problem, the invention provides a kind of Exhaust gas purifying device, this device comprises the outlet pipe that links to each other with motor, be arranged on the catalyzer in the outlet pipe, the SAS Secondary Air Supply pipe that the upstream side in the position that catalyzer is set links to each other with outlet pipe and the joint that holds SAS Secondary Air Supply pipe and outlet pipe and discharge the silencing apparatus of end of the outlet pipe of exhaust, wherein, silencing apparatus comprises between the end that is arranged on outlet pipe and the described joint to be used to suppress the mobile inhibition parts of exhaust air flow.
According to the present invention, the inhibition parts that flow are arranged between the end and described joint of the outlet pipe of discharging exhaust, to suppress flowing of exhaust.Therefore, can prevent that the exhaust of discharging from the end of outlet pipe is directly to the SAS Secondary Air Supply pipe inspection.Therefore, SAS Secondary Air Supply Guan Buhui is overheated, thereby can suppress to flow into from the SAS Secondary Air Supply pipe amount minimizing of the oxygen of outlet pipe.And because catalyzer is arranged in the outlet pipe, so most of heat of exhaust do not leak into the outside of outlet pipe but passes to catalyzer, thereby makes catalyst activation.
Here, the inhibition parts that flow are arranged between the end and described joint of outlet pipe, comprise that the expansion chamber of the end that for example will wherein be provided with outlet pipe and the exhaust that SAS Secondary Air Supply pipe next door separated from one another, inhibition are ejected from the end of outlet pipe arrive the covering of described joint etc. linearly.And, flow to suppress parts and be not limited to consistent with the sectional shape of silencing apparatus on short side direction circularly or oval, and can be different shape, semicircle etc. for example.And the inhibition parts that flow can be connected so that be supported with the whole interior perimeter surface of silencing apparatus, are perhaps supported by perimeter surface in the part of silencing apparatus, are perhaps supported by the pipeline that is arranged in the silencing apparatus.And flow suppressing parts can be plate-shaped member, or considers the size of the expansion chamber in the silencing apparatus and the local parts that projection and recess are arranged.
In order to address the above problem, the present invention also provides another kind of Exhaust gas purifying device, this Exhaust gas purifying device comprises the outlet pipe that links to each other with motor, be arranged on the catalyzer in the outlet pipe, the SAS Secondary Air Supply pipe that upstream side in the position that catalyzer is set links to each other with outlet pipe, and hold the joint of SAS Secondary Air Supply pipe and outlet pipe and discharge the silencing apparatus of end of the outlet pipe of exhaust, wherein, silencing apparatus comprises being contained between the part in the silencing apparatus to be used to suppress the mobile inhibition parts of exhaust air flow of the end that is arranged on outlet pipe and SAS Secondary Air Supply pipe.According to the present invention, the exhaust of discharging from the end of outlet pipe can be directly to the SAS Secondary Air Supply pipe inspection, so the SAS Secondary Air Supply tubular portion can be not overheated, thereby the amount that can suppress to flow into from the SAS Secondary Air Supply pipe oxygen of outlet pipe reduces.
And, in one embodiment of the invention, at least a portion of the outer wall of silencing apparatus is the double layer construction with inwall parts and outer wall parts, and the SAS Secondary Air Supply pipe extends between inwall parts and outer wall parts to be introduced in the silencing apparatus, and the inhibition parts that flow comprise described inwall parts.According to this embodiment, the SAS Secondary Air Supply pipe extends between inwall parts and outer wall parts, to be introduced into silencing apparatus.Therefore, because the inwall parts have suppressed exhaust directly to the SAS Secondary Air Supply pipe inspection, prevented that therefore SAS Secondary Air Supply pipe excessive temperature from raising.And the outer wall parts have prevented that the downstream towards outlet pipe of SAS Secondary Air Supply pipe is exposed in the ambient air.Therefore, the heat that is kept in the silencing apparatus makes the temperature of low-temperature secondary air raise slightly, makes described secondary air flow into outlet pipe, thereby further makes catalyst activation.
And in this embodiment, silencing apparatus can comprise hollow cylinder and be connected to the cover of the opening of hollow cylinder that this cover can be the double layer construction with inwall parts and outer wall parts.Like this, because cover is to have the double layer construction of inwall parts and outer wall parts and inwall parts to play to flow and suppress the effect of parts, realized that therefore a kind of situation with the special-purpose member that for example is provided for suppressing exhaust air flow in silencing apparatus compares the Exhaust gas purifying device of easy assembling.
And in an embodiment of the present invention, silencing apparatus inside comprises a plurality of expansion chambers, and the next door that is used to separate the expansion chamber of silencing apparatus suppresses parts as flowing.According to this embodiment, because the next door of expansion chamber that is used to separate silencing apparatus is as the mobile inhibition parts that suppress exhaust air flow, the amount that therefore can suppress to flow into from the SAS Secondary Air Supply pipe oxygen of outlet pipe reduces, and need not to increase the quantity of the parts of Exhaust gas purifying device.
In order to address the above problem, the present invention also provides another Exhaust gas purifying device, this Exhaust gas purifying device comprises the outlet pipe that links to each other with motor, be arranged on the catalyzer in the outlet pipe, the SAS Secondary Air Supply pipe that upstream side in the position that catalyzer is set links to each other with outlet pipe, and hold the joint of SAS Secondary Air Supply pipe and outlet pipe and discharge the silencing apparatus of end of the outlet pipe of exhaust, wherein, the part in the silencing apparatus of being contained in of SAS Secondary Air Supply pipe is arranged in the zone the area of space that injects directly into except the exhaust of discharging from the end of outlet pipe.According to the present invention, the part in the silencing apparatus of being contained in of SAS Secondary Air Supply pipe is arranged on zone the area of space that injects directly into except the exhaust of discharging from the end of outlet pipe.Therefore, the SAS Secondary Air Supply tubular portion can be not overheated, and can suppress to flow into from the SAS Secondary Air Supply pipe amount minimizing of the oxygen of outlet pipe.
And, in one embodiment of the present of invention, outlet pipe comprises the straight-tube portion that exhaust is discharged from its end, the described end of straight-tube portion is contained in the silencing apparatus, and the area of space in the silencing apparatus that the SAS Secondary Air Supply pipe is arranged to extend with bearing of trend from the end of straight-tube portion along straight-tube portion does not intersect.According to present embodiment, the SAS Secondary Air Supply pipe is arranged in the silencing apparatus as follows,, makes that the area of space on the bearing of trend with straight-tube portion does not intersect that is.Therefore, the exhaust of discharging from the end of straight-tube portion is not directly to the SAS Secondary Air Supply pipe inspection, thereby SAS Secondary Air Supply Guan Buhui is overheated.That is, exhaust is discharged and is expanded from straight-tube portion, and temperature reduces, and contacts with the SAS Secondary Air Supply pipe then.Therefore, can prevent that the SAS Secondary Air Supply pipe is overheated.
And according to one embodiment of present invention, the SAS Secondary Air Supply pipe is arranged on the opposite opposite side of the direction end, that discharge from this end with exhaust of outlet pipe.According to present embodiment, the outlet pipe on the opposition side of direction SAS Secondary Air Supply pipe and the end that is positioned at outlet pipe, that discharge from this end with exhaust links to each other.Therefore, can suppress directly to arrive the SAS Secondary Air Supply pipe, thereby can prevent that the SAS Secondary Air Supply pipe is overheated from the exhaust that discharge the end of outlet pipe.
And, can be provided with any in the above-mentioned Exhaust gas purifying device according to Straddle type vehicle of the present invention.This Straddle type vehicle comprises for example motorcycle (comprising scooter), lorry and snowmobile etc.According to the present invention, the exhaust that can prevent to discharge from the end of outlet pipe is directly to the SAS Secondary Air Supply pipe inspection.Therefore, can prevent that SAS Secondary Air Supply pipe excessive temperature from raising, thereby can suppress the oxygen content minimizing of the secondary air that mixes with exhaust.Thereby, owing to further make catalyst activation, and therefore cleaner from the exhaust of silencing apparatus discharge, thus can be implemented in the favourable Straddle type vehicle in environment aspect.
Description of drawings
Fig. 1 is the side view that is provided with according to the motorcycle of the Exhaust gas purifying device of the first embodiment of the present invention;
Fig. 2 is the sectional view of Exhaust gas purifying device;
Fig. 3 is the perspective view of the front portion on vehicle heading of Exhaust gas purifying device;
Fig. 4 is the sectional view along the line IV-IV among Fig. 2;
Fig. 5 is the sectional view according to second embodiment's Exhaust gas purifying device;
Fig. 6 is the sectional view along the line VI-VI among Fig. 5;
Fig. 7 is the sectional view according to the 3rd embodiment's Exhaust gas purifying device;
Fig. 8 is the sectional view along the line VIII-VIII among Fig. 7;
Fig. 9 is the perspective view according to the rear portion on vehicle heading of the 4th embodiment's Exhaust gas purifying device.
Symbol description
1: motorcycle, 2: vehicle frame, 3: front fork, 4: engine unit, 5: vehicle seat, 6: front-wheel, 8: trailing wheel, 10: motor, 15: outlet pipe, 15a: outlet pipe downstream part, 15i: the end of outlet pipe downstream part (end of outlet pipe), 17: tailpipe, 18: support, 20,200,201,202: Exhaust gas purifying device, 21: upstream catalyst, 22: downstream catalyst, 23: SAS Secondary Air Supply pipe, 23d: first portion's supply tube, 23e: second portion supply tube, 25: secondary air inlet tube, 26: leaf valve assembly, 30: silencing apparatus, 32: hollow cylinder, 33: the tubular cover, 34: front cover member, 35: inwall parts (flow and suppress parts), 35a: inwall feature bottom, 36: back cover part, 39: outer wall parts, 50: the first expansion chambers, 51: the second expansion chambers, 52: the three expansion chambers, 54: the second conduits, 56: the first conduits, 57: the first next doors (flow and suppress parts), 58: the second next doors, 61: outer wall parts, 63: the inwall parts
Embodiment
Below with reference to accompanying drawing one embodiment of the present of invention are described.
Fig. 1 to 4 illustrates the Exhaust gas purifying device of the first embodiment of the present invention.Fig. 1 is that Fig. 2 is the sectional view according to first embodiment's Exhaust gas purifying device 20 according to the side view of the profile of the motorcycle that is configured to Straddle type vehicle of the present invention, and Fig. 3 is the perspective view of the front portion on vehicle heading of Exhaust gas purifying device 20.Fig. 4 is the sectional view along the line IV-IV among Fig. 2.
In Fig. 1, the preceding end bearing front fork 3 of following camber beam-type (underbone) vehicle frame 2 of motorcycle 1 is so that described front fork can left-right rotation.Middle body supporting combined swinging (unitswing) engine unit 4 of vehicle frame 2 is so that vertically (up and down) swing of described engine unit.Vehicle seat 5 is installed in the top of engine unit 4.Front fork 3 is equipped with front-wheel 6 at lower end, at upper end handle 7 is installed.Trailing wheel 8 is arranged on the rear end of engine unit 4.Engine unit 4 is configured to comprise four-stroke water cooled engine and gearbox, is provided with V banding pattern stepless speed variator in this gearbox, and motor 10 is mounted to cylinder-bore axis basic horizontal and forward.
Exhaust gas purifying device 20 is arranged on the right side of trailing wheel 8 along vehicle heading, is used for purifying Nox, CO, the HC of the exhaust of discharging from motor 10.Exhaust gas purifying device 20 comprises silencing apparatus 30 and outlet pipe downstream part 15a.Support 18 links to each other with the top of Exhaust gas purifying device 20, and support 18 links together with engine unit 4 bolt.Therefore, Exhaust gas purifying device 20 and engine unit 4 vertical oscillation together.SAS Secondary Air Supply pipe 23 is introduced in the silencing apparatus 30 that forms Exhaust gas purifying device 20, an end of SAS Secondary Air Supply pipe 23 link to each other with outlet pipe downstream part 15a (seeing Fig. 2-4).
The other end that stretches out silencing apparatus 30 of SAS Secondary Air Supply pipe 23 links to each other with an end of secondary air inlet tube 25, and the other end of secondary air inlet tube 25 links to each other with leaf valve assembly 26.This leaf valve assembly 26 is arranged in the bonnet, the rear lower side of vehicle seat 5, the top of trailing wheel 8.Leaf valve assembly 26 has the function that only allows secondary air to flow to catalyzer and stop the edge to be flowed in the other direction.
Below with reference to the Exhaust gas purifying device 20 of Fig. 2-4 detailed description according to the first embodiment of the present invention.
As shown in Figure 2, the silencing apparatus 30 that forms Exhaust gas purifying device 20 comprises the hollow cylinder 32 that forms the cylindrical shell with basic elliptic cross-section, is connected to the front cover member 34 of open front of hollow cylinder 32 and the back cover part 36 that is connected to after-opening along vehicle heading along vehicle heading.Hollow cylinder 32, front cover member 34 and back cover part 36 are double layer construction.Glass wool 32a is filled between the external component and inner member of hollow cylinder 32, to improve the heat-insulating property of silencing apparatus 30.
First next door 57 and second next door 58 are separated into first expansion chamber 50, second expansion chamber 51 and the 3rd expansion chamber 52 with the inside of silencing apparatus 30 successively from the front portion on vehicle heading.First conduit 56 passes first next door 57 and is arranged in first expansion chamber 50 and second expansion chamber 51, flows to second expansion chamber 51 to allow exhaust from first expansion chamber 50.And second conduit 54 passes second next door 58 and is arranged in second expansion chamber 51 and the 3rd expansion chamber 52, flows to the 3rd expansion chamber 52 to allow exhaust from second expansion chamber 51.
Outlet pipe downstream part 15a is incorporated into the silencing apparatus 30 from the outlet pipe intake 33a at the opposite side of tubular cover 33.This outlet pipe downstream part 15a is 30 vertically extend back from the front portion on vehicle heading along silencing apparatus, and the rear portion 15c bending of outlet pipe downstream part 15a on vehicle heading takes the shape of the letter U.The end 15i that discharges exhaust is arranged in first expansion chamber 50, and this first expansion chamber is positioned at the forefront on vehicle heading.Therefore, can shorten the longitudinal length of silencing apparatus 30, and the length that is contained in the outlet pipe downstream part 15a in the silencing apparatus 30 remains unchanged.
In the 15a of outlet pipe downstream part, be provided with two kinds of catalyzer, that is, mainly play the upstream catalyst 21 and the main downstream catalyst 22 that plays oxidation of reduction.Upstream catalyst 21 is set in place in the 15a of the outlet pipe downstream part of tubular cover 33 inside.Through upstream catalyst 21 and downstream catalyst 22, the end 15i from outlet pipe downstream part 15a enters first expansion chamber 50 then from the blast air of the upstream portion of outlet pipe 15.In addition, the end of the outlet pipe intake 33a of tubular cover 33 is taper, the side of the top supporting outlet pipe downstream part 15a of tapering part.
SAS Secondary Air Supply pipe 23 and outlet pipe downstream part 15a between outer wall parts 39 and inwall parts 35 and the part that is positioned at the downstream of upstream catalyst 21 be connected.Here, with reference to Fig. 4 and Fig. 3 described being connected of SAS Secondary Air Supply pipe 23 and outlet pipe downstream part 15a.In Fig. 4, the left side of the trailing wheel 8 of vehicle at Exhaust gas purifying device 20 is shown.As shown in the figure, patchhole 39b be arranged on outer wall parts 39 towards the top of body side, SAS Secondary Air Supply pipe 23 is from patchhole 39b inserts silencing apparatus 30.
SAS Secondary Air Supply pipe 23 comprises supply tube 23d of first portion and second portion supply tube 23e.In Fig. 4, the cross section semicircular in shape of the bottom 35a of inwall parts 35 is shown.The supply tube 23d of first portion is incorporated in the silencing apparatus 30 along the side of the bottom 35a of inwall parts 35.The end 23g of the supply tube 23d of first portion is connected with the outlet pipe downstream part 15a of the lower area that is arranged on silencing apparatus 30.Secondary air inflow entrance 15f is arranged on the 15a of outlet pipe downstream part, and the end 23g of the supply tube 23d of first portion and the peripheral edge of secondary air inflow entrance 15f are by being welded together.
In addition, near the secondary air inflow entrance 15f of outlet pipe downstream part 15a, outlet pipe downstream part 15a comprises bottom semicircle barrier part 15g that is half tubular substantially and the top semicircle barrier part 15h (referring to Fig. 2) that also is half tubular substantially.Bottom semicircle barrier part 15g forms the downside of outlet pipe downstream part 15a, and top semicircle barrier part 15h forms the upside of outlet pipe downstream part 15a.The side of the side of top semicircle barrier part 15h and bottom semicircle barrier part 15g links together, thereby forms tubular outlet pipe downstream part 15a.Secondary air inflow entrance 15f is arranged on the semicircle barrier part 15h of top.And in the outside of silencing apparatus, the end 23e ' of the other end 23h of the supply tube 23d of first portion and second portion supply tube 23e is by being welded together.Therefore, when assembling Exhaust gas purifying device 20, after being contained in the supply tube 23d of first portion in the silencing apparatus 30, second portion supply tube 23e is connected with the other end 23h of the supply tube 23d of first portion, therefore assembling Exhaust gas purifying device 20 becomes easy.
As shown in Figure 2, the zone that SAS Secondary Air Supply pipe 23 passes between inwall parts 35 and outer wall parts 39 from the outside of silencing apparatus 30 is incorporated in the silencing apparatus 30, so that be connected with outlet pipe downstream part 15a between inwall parts 35 and outer wall parts 39.The joint of outlet pipe downstream part 15a and SAS Secondary Air Supply pipe 23 and outlet pipe downstream part 15a the downstream of joint part (comprising end 15i) be contained in the silencing apparatus 30.And, in the 15a of outlet pipe downstream part, the part in the downstream of the joint of outlet pipe downstream part 15a and SAS Secondary Air Supply pipe 23 is incorporated in the cylinder that is formed by inwall parts 35, hollow cylinder 32 and back cover part 36 via the patchhole 35d that is arranged on the inwall parts 35.
As mentioned above, the end 15i of outlet pipe downstream part 15a is arranged in first expansion chamber 50, and first expansion chamber is arranged on the forefront of silencing apparatus 30 on vehicle heading.And shown in Fig. 2-4, the zone that the supply tube 23d of first portion passes between inwall parts 35 and outer wall parts 39 from the outside of silencing apparatus 30 is incorporated into the silencing apparatus 30.Therefore, inwall parts 35 are arranged between the end 15i and the supply tube 23d of first portion of outlet pipe downstream part 15a.Thereby inwall parts 35 can play the effect of the mobile inhibition parts that exhaust that inhibition discharges from outlet pipe downstream part 15a directly sprays to the supply tube 23d of first portion.
That is, cover end 15i from outlet pipe downstream part 15a to the zone that is contained in the supply tube 23d of first portion one side in the silencing apparatus 30 as the mobile inhibition parts of inwall parts 35 from all directions according to present embodiment.Therefore, from will impacting on the inwall parts 35 that end 15i discharges, directly spray to the supply tube 23d of first portion thereby suppressed exhaust to the exhaust that the supply tube 23d of first portion sprays.
In addition, as mentioned above, the edge 35c of inwall parts 35 and the edge 39c of outer wall parts 39 are of similar shape, and the inboard of the edge 39c of the outside of edge 35c and outer wall parts 39 links together in a plurality of positions.Therefore, have only the exhaust of in first expansion chamber 50, expanding on a small quantity and temperature being descended to flow to the outside of inwall parts 35 from the gap between inwall parts 35 and the outer wall parts 39.Therefore, the SAS Secondary Air Supply pipe 23 with the supply tube 23d of first portion can be not overheated and the oxygen content that can suppress secondary air reduce.
And inwall parts 35 comprise having bowl-shape bottom 35a of being substantially of semi-circular cross-section, and bottom 35a is relative with the end 15i of outlet pipe downstream part 15a.Therefore, the exhaust of spraying to bottom 35a from the end 15i of outlet pipe downstream part 15a strikes bottom 35a, thereby has prevented to flow to SAS Secondary Air Supply pipe 23.And, because bottom 35a forms and is bowl-shape substantially, so exhaust can not be trapped in bottom 35a, but along injection direction reposefully reverse directions to flow to first conduit 56.
And flow air is compared temperature with outside air and is risen slightly when flowing through the supply tube 23d of first portion in SAS Secondary Air Supply pipe 23, and this is owing to be subjected to being kept at heat effects in outer wall parts 39, tubular cover 33 and the hollow cylinder 32.Therefore, catalyzer reaches the time shortening of activation temperature.
In addition, according to present embodiment, although SAS Secondary Air Supply pipe 23 is incorporated in the silencing apparatus 30 via the patchhole 39b towards the top of body side that is arranged on outer wall parts 39 be formed on top semicircle barrier part 15h on the peripheral edge of secondary air inflow entrance 15f be connected, the path of introducing SAS Secondary Air Supply pipe 23 is not limited thereto.For example, patchhole 39b can be formed on the bottom of outer wall parts 39, and secondary air inflow entrance 15f can be arranged on the semicircle barrier part 15g of bottom.Thereby SAS Secondary Air Supply pipe 23 can be introduced silencing apparatus 30 via patchhole 39b, so that be connected with the peripheral edge of secondary air inflow entrance 15f on being formed on bottom semicircle barrier part 15g.In this case, outlet pipe downstream part 15a (top semicircle barrier part 15h) itself is at the end 15i of outlet pipe downstream part 15a be contained between the SAS Secondary Air Supply pipe 23 in the silencing apparatus 30.Therefore, outlet pipe downstream part 15a itself can play the effect that exhaust air flow suppresses parts, and not be used in inwall parts 35 is set in the silencing apparatus 30.
Next with reference to Fig. 5 and 6 Exhaust gas purifying devices of describing according to a second embodiment of the present invention 200.Fig. 5 illustrates Exhaust gas purifying device 200 according to a second embodiment of the present invention.Fig. 6 is the sectional view along the line VI-VI of Fig. 5.Here, according to parts identical in second embodiment's the Exhaust gas purifying device 200 and the Exhaust gas purifying device 20 according to first embodiment use with Exhaust gas purifying device 20 according to first embodiment in identical reference character represent, be not described in detail below.And according to present embodiment, SAS Secondary Air Supply pipe 23 comprises supply tube 23d of first portion and second portion supply tube 23e, and is identical with first embodiment, therefore no longer describes here.
Outlet pipe downstream part 15a comprises straight-tube portion 15k, and exhaust enters silencing apparatus 30 from the end 15i of straight-tube portion 15k.The area of space V that SAS Secondary Air Supply pipe 23 is arranged to extend with the bearing of trend from the end 15i of straight-tube portion 15k along straight-tube portion 15k in silencing apparatus 30 does not intersect.
Particularly, as shown in Figure 5, outlet pipe downstream part 15a is incorporated into the silencing apparatus 30 from the outlet pipe intake 33a of tubular cover 33, and extends back along vehicle heading in silencing apparatus 30 bottoms.Upstream catalyst 21 is arranged on the upstream side place of the part that extends back along vehicle heading of outlet pipe downstream part 15a.Secondary air inflow entrance 15f is formed on the downstream side of upstream catalyst 21, and downstream catalyst 22 is arranged on the downstream side of secondary air inflow entrance 15f.The rear portion 15c place of outlet pipe downstream part 15a on vehicle heading bends to U-shaped, and the straight-tube portion 15k adjacent with rear portion 15c on vehicle heading extends forward along vehicle heading.The end 15i of straight-tube portion 15k is positioned at the rear of secondary air streams inlet 15f on vehicle heading.
The exhaust of straight-tube portion 15k inside of flowing through is flowed forward (direction among the figure shown in the arrow G) along vehicle heading, so that enter silencing apparatus 30 from the end 15i of straight-tube portion 15k.Further flow forward along vehicle heading when the exhaust that is discharged from is expanded in silencing apparatus 30, but also not have fully to expand but the very high exhaust of temperature be ejected in the silencing apparatus 30 along in the area of space V of the bearing of trend extension of straight-tube portion 15k.When SAS Secondary Air Supply pipe 23 be arranged on silencing apparatus 30 in area of space V intersect the position time, SAS Secondary Air Supply pipe 23 is overheated.
According to present embodiment, as shown in Figure 6, SAS Secondary Air Supply pipe 23 is introduced in the silencing apparatus 30, has eliminated the position relative with the end 15i of straight-tube portion 15k simultaneously.Particularly, SAS Secondary Air Supply pipe 23 from the place ahead on vehicle heading of being formed on outer wall parts 39 and the patchhole 39b towards the top of vehicle body stretch into silencing apparatus.SAS Secondary Air Supply pipe 23 is located to be bent downwardly slightly at curved section 23d ' to the extension of central axis of silencing apparatus 30, continues then to extend.One end 23g of SAS Secondary Air Supply pipe 23 links together with the peripheral edge that is formed on the secondary air inflow entrance 15f on the semicircle barrier part 15h of top.
Outlet pipe downstream part 15a extends at the lower area of silencing apparatus 30, and the 15c place, rear portion on vehicle heading bends to U-shaped.Therefore, as shown in Figure 6, the end 15i of straight-tube portion 15k is located at the top of the outlet pipe downstream part 15a that the lower area of silencing apparatus 30 extends.As mentioned above, SAS Secondary Air Supply pipe 23 is introduced in the silencing apparatus 30, has eliminated the position relative with the end 15i of straight-tube portion 15k simultaneously.SAS Secondary Air Supply pipe 23 is arranged in the silencing apparatus 30, and does not intersect with the area of space V that extends along the bearing of trend of straight-tube portion 15k, the end 23g of SAS Secondary Air Supply pipe 23 and the peripheral edge of secondary air inflow entrance 15f that is formed at the place ahead of end 15i on vehicle heading link together.Thereby, do not suppress parts (inwall parts 35) though in silencing apparatus 30, be provided with to flow, can prevent exhaust superheating SAS Secondary Air Supply pipe 23.In addition, patchhole 39b can be selectively for example further towards vehicle body be arranged on the outer wall parts 39, perhaps be arranged on the below of silencing apparatus 30 so that eliminate the position relative with the end 15i of straight-tube portion 15k.
Next the Exhaust gas purifying device 201 of a third embodiment in accordance with the invention is described with reference to Fig. 7 and 8.Fig. 7 illustrates the Exhaust gas purifying device 201 of a third embodiment in accordance with the invention, and Fig. 8 is the sectional view along the line VIII-VIII of Fig. 7.Here, according to parts identical in the 3rd embodiment's the Exhaust gas purifying device 201 and the Exhaust gas purifying device 20 according to first embodiment use with Exhaust gas purifying device 20 according to first embodiment in identical reference character represent, be not described in detail below.In addition, in Fig. 8, omitted pipeline and the tailpipe that extends through the next door and exhaust is flowed between each expansion chamber.And, in Fig. 7, use double dot dash line to represent SAS Secondary Air Supply pipe 23.
As shown in Figure 7, the silencing apparatus 30 that forms Exhaust gas purifying device 201 comprises hollow cylinder 32, is connected to the bowl-shape front cover member 34 of open front of hollow cylinder 32 and the back cover part 36 that is connected to after-opening along vehicle heading along vehicle heading.
First next door 57 and second next door 58 are separated into first expansion chamber 50, second expansion chamber 51 and the 3rd expansion chamber 52 with the inside of silencing apparatus 30 successively from the rear portion on vehicle heading.First conduit 56 extends through first next door 57 and is arranged in first expansion chamber 50 and second expansion chamber 51.And second conduit 54 extends through second next door 58 and is arranged in second expansion chamber 51 and the 3rd expansion chamber 52.The edge 57 in first next door 57 ' and the edge 58 in second next door 58 ' with the interior perimeter surface of hollow cylinder by being welded together.And a side of first next door 57 and first conduit 56 is by being welded together, and a side of second next door 58 and second conduit 54 is by being welded together.In addition, outlet pipe downstream part 15a extends through first next door 57 and second next door 58, and is bearing in the silencing apparatus 30 by the next door.And the 3rd conduit 55 that the exhaust that permission is expanded in the 3rd expansion chamber 52 is discharged from the rear of vehicle extends through first next door 57 and is connected with tailpipe 17 with second next door 58.
As shown in Figure 8, the SAS Secondary Air Supply pipe 23 edges direction identical with the axis of outlet pipe downstream part 15a extends into the 3rd expansion chamber 52 and second expansion chamber 51 in the silencing apparatus 30.SAS Secondary Air Supply pipe 23 is crooked so that towards outlet pipe downstream part 15a at the curved section 23c place that is arranged in second expansion chamber 51, and the end 23a of SAS Secondary Air Supply pipe 23 is connected with outlet pipe downstream part 15a in second expansion chamber 51.
Particularly, as shown in Figure 8, the end 23a of SAS Secondary Air Supply pipe 23 is connected with secondary air inflow entrance 15f between upstream catalyst 21 that is arranged on outlet pipe downstream part 15a and the downstream catalyst 22.Secondary air inflow entrance 15f is arranged in second expansion chamber 51.Ring-type buildup piece 42 is installed on the end 23a of SAS Secondary Air Supply pipe 23.The end 23a of buildup piece 42 and SAS Secondary Air Supply pipe 23 is by being welded together, and with the outer peripheral portion 15f ' of the secondary air inflow entrance 15f of a side that is arranged on outlet pipe downstream part 15a also by being welded together.Therefore, improved the intensity of outlet pipe downstream part 15a supporting SAS Secondary Air Supply pipe 23.And SAS Secondary Air Supply pipe 23 extends through second next door 58 and is supported by second next door 58.Therefore, Exhaust gas purifying device 201 can prevent that SAS Secondary Air Supply pipe 23 from vibrating in silencing apparatus 30, and has favorable durability.
Shown in Fig. 7 and 8, first next door 57 is arranged on exhaust and enters between the end 15i of outlet pipe downstream part 15a of first expansion chamber 50 and SAS Secondary Air Supply pipe 23 and the joint that outlet pipe downstream part 15a is connected via it.Therefore, the effect of the mobile inhibition parts that exhaust that inhibition discharges from the end 15i of outlet pipe downstream part 15a directly sprays to SAS Secondary Air Supply pipe 23 is played in first next door 57.
That is, zone from the end 15i of outlet pipe downstream part 15a to a side that is contained in the SAS Secondary Air Supply pipe 23 in the silencing apparatus 30 is covered from all directions in first next door 57.According to present embodiment, the end 15i of outlet pipe downstream part 15a is arranged in first expansion chamber 50.And as mentioned above, SAS Secondary Air Supply pipe 23 is arranged in the expansion chamber different with it, promptly is arranged in second expansion chamber 51 and the 3rd expansion chamber 52, to be connected in second expansion chamber 51 with outlet pipe downstream part 15a.The edge 57 in first next door 57 that first expansion chamber 50 and second expansion chamber 51 are separated from each other ' with the interior perimeter surface of hollow cylinder 32 by being welded together.Therefore, the effect of barrier is played in first next door 57, and exhaust can directly not sprayed to SAS Secondary Air Supply pipe 23, but first conduit 56 of will flowing through, the exhaust of expanding in second expansion chamber 51 at first contacts with SAS Secondary Air Supply pipe 23.Therefore, the secondary air that flows through SAS Secondary Air Supply pipe 23 can not reduced thereby suppressed the oxygen content in the secondary air by superheating.
And the blast air that expands in second expansion chamber 51 flows into the 3rd expansion chamber 52 through second conduit 54 and reexpands.The exhaust of expanding in the 3rd expansion chamber 52 contacts with the part 23i that is positioned at the 3rd expansion chamber 52 (upstream portion of SAS Secondary Air Supply pipe) of SAS Secondary Air Supply pipe 23.Consequent heat transferred SAS Secondary Air Supply tubular portion 23i.The temperature of the exhaust of expanding at the 3rd expansion chamber 52 is lower than the temperature of the exhaust of the outlet pipe downstream part 15a that flows through, therefore can prevent that also SAS Secondary Air Supply tubular portion 23i is overheated.
And as mentioned above, SAS Secondary Air Supply pipe 23 extends through second expansion chamber 51 and is connected with outlet pipe downstream part 15a with the 3rd expansion chamber 52.Therefore, the exhaust in each expansion chamber makes the air of the SAS Secondary Air Supply pipe 23 of flowing through compare temperature with ambient air to rise slightly, so the time that catalyzer reaches activation temperature shortens.
Next describe the fourth embodiment of the present invention in detail with reference to Fig. 9.Fig. 9 illustrates the Exhaust gas purifying device 202 of a fourth embodiment in accordance with the invention, and this figure is the sectional view that the rear portion on vehicle heading of Exhaust gas purifying device 202 mainly is shown.Here, identical parts use in the Exhaust gas purifying device 201 with a third embodiment in accordance with the invention identical reference character to represent in the Exhaust gas purifying device 202 of a fourth embodiment in accordance with the invention and the Exhaust gas purifying device 201 a third embodiment in accordance with the invention, are not described in detail below.In addition, in Fig. 9, omitted pipeline, tailpipe and the 3rd expansion chamber that extends through the next door and exhaust is flowed at each expansion chamber.
According to present embodiment, SAS Secondary Air Supply pipe 23 is positioned at the end 15i of outlet pipe downstream part 15a and exhaust relatively and goes up the outlet pipe downstream part 15a of (along vehicle heading forward) in the opposite direction here, from the discharge side that this end 15i discharges and be connected.To describe in detail below.As shown in Figure 9, first next door 57 and the second next door (not shown) are separated into first expansion chamber 50, second expansion chamber 51 and the 3rd expansion chamber (not shown) with the inside of silencing apparatus 30 successively from the rear portion on vehicle heading.In addition, according to present embodiment, in order to improve the performance that silencing apparatus 30 abates the noise, first expansion chamber 50 forms bigger than the volume of first expansion chamber 50 among other embodiment.
Outlet pipe downstream part 15a is from extending back silencing apparatus 30 in the front portion on the vehicle heading.Upstream catalyst 21 is arranged on the upstream side of outlet pipe downstream part 15a, and secondary air inflow entrance 15f is formed on the downstream side of outlet pipe downstream part 15a, and downstream catalyst 22 is arranged on the downstream side of secondary air inflow entrance 15f.The end 15i of outlet pipe downstream part 15a is arranged in first expansion chamber 50, and this first expansion chamber is located at the rear portion on the vehicle heading.Flow through outlet pipe downstream part 15a exhaust along vehicle heading backward (direction among the figure shown in the arrow G) discharge from the end 15i of outlet pipe downstream part 15a, in first expansion chamber 50, to expand temperature is reduced.
SAS Secondary Air Supply pipe 23 and outlet pipe downstream part 15a be certain distance apart, and is arranged to be parallel to the outlet pipe downstream part 15a that extends back from the front portion on vehicle heading.The SAS Secondary Air Supply pipe extends through the 3rd expansion chamber and second expansion chamber 51 enters first expansion chamber 50.SAS Secondary Air Supply pipe 23 is crooked at the curved section 23c place that is arranged in first expansion chamber 50, so that towards outlet pipe downstream part 15a.SAS Secondary Air Supply pipe 23 is connected with buildup piece 42 with the peripheral edge of secondary air inflow entrance 15f, and wherein, secondary air inflow entrance 15f is formed on the place ahead of the end 15i of outlet pipe downstream part 15a along vehicle heading.The outlet pipe downstream part 15a that the exhaust of SAS Secondary Air Supply pipe 23 and the end 15i that is positioned at outlet pipe downstream part 15a is discharged on the opposite direction of direction is connected.Therefore, any part of SAS Secondary Air Supply pipe 23 all is positioned at just the opposite side of the exhaust of discharging from the end 15i of outlet pipe downstream part 15a, and end 15i is between SAS Secondary Air Supply pipe 23 and described exhaust.Therefore, exhaust is discharged from end 15i, expands and temperature is reduced, and contacts with SAS Secondary Air Supply pipe 23 then.Therefore, can prevent that SAS Secondary Air Supply pipe 23 is overheated.
In addition, the invention is not restricted to these embodiments, but admit of various modifications.For example, for above-mentioned Exhaust gas purifying device 20 to 202, flow and suppress the next door that parts also can be used as the inwall parts or be used for separating expansion chamber.But, be used for preventing that the special-purpose member that directly sprays to SAS Secondary Air Supply pipe 23 from the exhaust that the end 15i of outlet pipe 15 discharges can be as the mobile inhibition parts of silencing apparatus 30.
And for above-mentioned Exhaust gas purifying device 20 to 202, inwall parts that suppress parts as flowing or next door are connected with the interior perimeter surface of silencing apparatus 30 at its place, peripheral edge, thereby are supported by silencing apparatus.Yet the method for the mobile suppressing portion part of supporting is not limited thereto.For example, the mobile parts that suppress can or support the pipeline that exhaust is flowed by perimeter surface, outlet pipe downstream part 15a in the part of silencing apparatus 30 between each expansion chamber.
Claims (6)
1. Exhaust gas purifying device comprises:
The outlet pipe that links to each other with motor,
Be arranged on upstream side catalyst and downstream side catalyzer in the outlet pipe,
The SAS Secondary Air Supply pipe that secondary air inflow entrance in end and the described outlet pipe between upstream side catalyst and downstream side catalyzer links to each other and
Hold the joint of SAS Secondary Air Supply pipe and outlet pipe and the silencing apparatus of the end of the outlet pipe of discharging exhaust,
Wherein, silencing apparatus comprises between the described end that is arranged on outlet pipe and the described joint to be used to suppress the mobile inhibition parts of exhaust air flow.
2. Exhaust gas purifying device comprises:
The outlet pipe that links to each other with motor,
Be arranged on upstream side catalyst and downstream side catalyzer in the outlet pipe,
The SAS Secondary Air Supply pipe that secondary air inflow entrance in end and the described outlet pipe between upstream side catalyst and downstream side catalyzer links to each other and
Hold the joint of SAS Secondary Air Supply pipe and outlet pipe and the silencing apparatus of the end of the outlet pipe of discharging exhaust,
Wherein, silencing apparatus comprises being contained between the part in the silencing apparatus to be used to suppress the mobile inhibition parts of exhaust air flow of the described end that is arranged on outlet pipe and SAS Secondary Air Supply pipe.
3. Exhaust gas purifying device as claimed in claim 1 or 2, wherein, at least a portion of the outer wall of silencing apparatus is the double layer construction with inwall parts and outer wall parts,
The SAS Secondary Air Supply pipe extends between inwall parts and outer wall parts, so that be introduced in the silencing apparatus,
The inhibition parts that flow comprise described inwall parts.
4. Exhaust gas purifying device as claimed in claim 3, wherein, silencing apparatus comprises hollow cylinder and the cover that is connected to the opening of hollow cylinder,
Described cover is the double layer construction with inwall parts and outer wall parts.
5. Exhaust gas purifying device as claimed in claim 1 or 2, wherein, silencing apparatus portion within it comprises a plurality of expansion chambers,
The inhibition parts that flow comprise and being used for the separated next door of the expansion chamber of silencing apparatus.
6. a Straddle type vehicle comprises as any described Exhaust gas purifying device in the claim 1 to 5.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005080688 | 2005-03-18 | ||
| JP080688/2005 | 2005-03-18 | ||
| JP045870/2006 | 2006-02-22 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810108882 Division CN101311504B (en) | 2005-03-18 | 2006-03-17 | Exhaust gas purifying apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1854478A CN1854478A (en) | 2006-11-01 |
| CN100443701C true CN100443701C (en) | 2008-12-17 |
Family
ID=37194886
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100820330A Expired - Fee Related CN100443701C (en) | 2005-03-18 | 2006-03-17 | Exhaust gas purification device |
| CN 200810108882 Expired - Fee Related CN101311504B (en) | 2005-03-18 | 2006-03-17 | Exhaust gas purifying apparatus |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810108882 Expired - Fee Related CN101311504B (en) | 2005-03-18 | 2006-03-17 | Exhaust gas purifying apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3146202U (en) |
| CN (2) | CN100443701C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011007137A (en) * | 2009-06-26 | 2011-01-13 | Suzuki Motor Corp | Muffler and motorcycle |
| CN103573335A (en) * | 2012-07-31 | 2014-02-12 | 东莞市旗丰消声器有限公司 | Box motorcycle muffler with front and rear muffler units |
| JP6236944B2 (en) * | 2012-11-10 | 2017-11-29 | 日立工機株式会社 | Muffler and engine working machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4094645A (en) * | 1977-01-24 | 1978-06-13 | Uop Inc. | Combination muffler and catalytic converter having low backpressure |
| US4579194A (en) * | 1984-03-01 | 1986-04-01 | Nissan Motor Co., Ltd. | Muffler with catalyst for internal combustion engine |
| JP2576909B2 (en) * | 1990-04-03 | 1997-01-29 | 本田技研工業株式会社 | Exhaust purification system for two-cycle engine |
| JPH09158722A (en) * | 1995-12-08 | 1997-06-17 | Mitsubishi Heavy Ind Ltd | Exhaust device for single cylinder internal combustion engine |
| CN1197155A (en) * | 1997-04-24 | 1998-10-28 | 本田技研工业株式会社 | Device for feeding secondary air to the discharge system of small motor two-wheel vehicle |
| FR2827908A1 (en) * | 2001-07-26 | 2003-01-31 | Peugeot Motocycles Sa | Exhaust gas purification system for two-stroke engine comprises two separate catalytic purifiers in series in exhaust pipe and device for injecting air between the purifiers |
| CN1499051A (en) * | 2002-10-29 | 2004-05-26 | 本田技研工业株式会社 | Exhauster of I.C. engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4048092A (en) * | 1973-03-05 | 1977-09-13 | Colonial Metals, Inc. | Catalytic mixture and method of use therefor |
-
2006
- 2006-03-17 CN CNB2006100820330A patent/CN100443701C/en not_active Expired - Fee Related
- 2006-03-17 CN CN 200810108882 patent/CN101311504B/en not_active Expired - Fee Related
-
2008
- 2008-08-27 JP JP2008006012U patent/JP3146202U/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4094645A (en) * | 1977-01-24 | 1978-06-13 | Uop Inc. | Combination muffler and catalytic converter having low backpressure |
| US4579194A (en) * | 1984-03-01 | 1986-04-01 | Nissan Motor Co., Ltd. | Muffler with catalyst for internal combustion engine |
| JP2576909B2 (en) * | 1990-04-03 | 1997-01-29 | 本田技研工業株式会社 | Exhaust purification system for two-cycle engine |
| JPH09158722A (en) * | 1995-12-08 | 1997-06-17 | Mitsubishi Heavy Ind Ltd | Exhaust device for single cylinder internal combustion engine |
| CN1197155A (en) * | 1997-04-24 | 1998-10-28 | 本田技研工业株式会社 | Device for feeding secondary air to the discharge system of small motor two-wheel vehicle |
| FR2827908A1 (en) * | 2001-07-26 | 2003-01-31 | Peugeot Motocycles Sa | Exhaust gas purification system for two-stroke engine comprises two separate catalytic purifiers in series in exhaust pipe and device for injecting air between the purifiers |
| CN1499051A (en) * | 2002-10-29 | 2004-05-26 | 本田技研工业株式会社 | Exhauster of I.C. engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1854478A (en) | 2006-11-01 |
| CN101311504B (en) | 2012-05-23 |
| JP3146202U (en) | 2008-11-06 |
| CN101311504A (en) | 2008-11-26 |
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