CN102317589A

CN102317589A - Engine

Info

Publication number: CN102317589A
Application number: CN2010800073248A
Authority: CN
Inventors: 坂口久幸; 青山惠纪; 村上龙一郎
Original assignee: Yanmar Co Ltd
Current assignee: Yanmar Co Ltd
Priority date: 2009-03-17
Filing date: 2010-03-10
Publication date: 2012-01-11
Anticipated expiration: 2030-03-10
Also published as: WO2010106955A1; CN103644015A; CN102317589B; CN103644015B

Abstract

Disclosed is an engine (100) which comprises a cylinder head (3), a muffler (6), and an exhaust manifold (5, 105, 205, 305) that is interposed between the cylinder head (3) and the muffler (6). The exhaust manifold (5, 105, 205, 305) has an exhaust inlet (12a, 112a) communicating with an exhaust port (34) that is formed within the cylinder head (3), and an exhaust outlet (11c, 111c) communicating with the muffler (6). The engine (100) is provided with an exhaust purification device (10, 110, 210). The exhaust purification device (10, 110, 210) is configured of the exhaust manifold (105, 205, 305) and an exhaust purifying catalyst (41, 42, 23) which is arranged in an internal space that serves as an exhaust passage between the exhaust inlet (12a, 112a) and the exhaust outlet (11c, 111c) of the exhaust manifold (105, 205, 305).

Description

Motor

Technical field

The present invention relates to a kind of motors such as DENG that in exhaust pathway, dispose exhaust gas purification catalyst.

Background technique

In the exhaust of discharging, contain higher nitrogen oxide, the particulate material of possibility that environmental pollution exerts an influence from internal-combustion engines such as DENG (below be called " motor ").From consideration to nearest environmental problem; The restriction of exhaust is strict more; In order to tackle this problem, the someone proposes a kind of technology that in the exhaust pathway of motor, disposes exhaust gas purification catalyst (oxidation catalyst), and this kind technology for example is disclosed in the

patent documentation

1,2,3.

Patent documentation 1: TOHKEMY 2006-22752 communique

Patent documentation 2: TOHKEMY 2006-29121 communique

Patent documentation 3: TOHKEMY 2008-31955 communique

But

patent documentation

1,2,3 disclosed exhaust gas purification catalysts all are enclosed in the silencing apparatus.Thereby, with the amount of accommodating exhaust gas purification catalyst accordingly, silencing apparatus maximizes, and causes the whole maximization of motor, and the whole shape of motor possibly break away from normalized shape.In addition, silencing apparatus is one of very large engine components, in order to change exhaust gas purification catalyst, needs dismounting, decomposes bigger silencing apparatus, therefore influences the maintainability of exhaust gas purification catalyst.In the engine operated machine that motor links to each other with working machine, the dismounting of silencing apparatus is more numerous and diverse with decomposition.In addition, in the exhaust pathway of motor, silencing apparatus is configured in the downstream side of gas exhaust manifold, and the exhaust that has arrived silencing apparatus is to have passed through the exhaust behind the gas exhaust manifold, therefore maybe low temperatureization the degree of oxidizing fire effect in the catalyzer that reduces in the silencing apparatus.

Summary of the invention

The objective of the invention is to; Consider the problem in the past of the above-mentioned that kind in the motor with exhaust gas purification catalyst; Provide a kind of and can guarantee the compactedness of motor, normalized shape, and can easily change the motor of exhaust gas purification catalyst.

In order to achieve the above object; Motor of the present invention possess cylinder cap, silencing apparatus and be folded in this cylinder cap and this silencing apparatus between gas exhaust manifold, this gas exhaust manifold comprises exhaust entrance that is connected with the relief opening that is formed in this cylinder cap and the exhaust outlet that is connected with this silencing apparatus.This kind motor has Exhaust gas purifying device; This Exhaust gas purifying device is made up of this gas exhaust manifold and exhaust gas purification catalyst, and this exhaust gas purification catalyst is configured in this exhaust entrance and the inner space as exhaust passageway between this exhaust outlet of this gas exhaust manifold.

As the effect of above-mentioned motor, use device owing to constitute exhaust gas purification through built-in exhaust gas purification catalyst in existing gas exhaust manifold, therefore compare with the way that new Exhaust gas purifying device is set in addition, can reduce the parts number of packages.In addition, owing to utilize the configuration space of the inner space of existing gas exhaust manifold as exhaust gas purification catalyst, so the boundary dimension of gas exhaust manifold can be the same with the boundary dimension under the situation that does not dispose exhaust gas purification catalyst.On the other hand, silencing apparatus also need not maximize for built-in exhaust gas purification catalyst.Thereby, can boundary dimension, shape that motor is whole be held in size, shape under the state that exhaust gas purification catalyst is not set.

In addition, about the maintainability of exhaust gas purification catalyst, need not the dismounting for catalyst changeout more, silencing apparatus separately.Can not be integrated dividually and constitute under the situation of Exhaust gas purifying device at the exhaust gas purification catalyst of the inside that makes gas exhaust manifold and this gas exhaust manifold; Need be with the Exhaust gas purifying device of Exhaust gas purifying device integral replacing Cheng Xin; But because than the housing of little a lot of gas exhaust manifold formation Exhaust gas purifying devices as engine components such as the vibration of silencing apparatus etc. itself; Therefore only carry out the dismounting operation of gas exhaust manifold, just can accomplish the replacing operation of Exhaust gas purifying device with respect to cylinder cap and silencing apparatus.In addition, see after and state, adopt can the dismounting exhaust gas purification catalyst with respect to gas exhaust manifold structure the time, can keep with gas exhaust manifold be folded between cylinder cap and the silencing apparatus state unchangeably, only change exhaust gas purification catalyst.Like this, the Exhaust gas purifying device of motor of the present invention can improve the maintainability of exhaust gas purification catalyst.

In addition; About the exhaust gas purification effect, compare at the silencing apparatus that is built-in with exhaust gas purification catalyst in the past with above-mentioned, owing in the inner space of the gas exhaust manifold of the upstream side of exhaust air flow, dispose exhaust gas purification catalyst suchly; Therefore in the moment that arrives exhaust gas purification catalyst; Heat of exhaust keeps quite high temperature, utilizes the oxidizing fire effect of the exhaust gas heat promotion exhaust gas purification catalyst of this high temperature, improves the exhaust gas purification effect, is the minimizing effect of exhaust emission.

In first form of above-mentioned motor; Another exhaust gas purification catalyst of configuration in the above-mentioned inner space of the above-mentioned gas exhaust manifold of the above-mentioned exhaust passageway of conduct in above-mentioned Exhaust gas purifying device; With the exhaust gas purification catalyst of the upstream side of the exhaust air flow that is arranged in this exhaust passageway in above-mentioned exhaust gas purification catalyst and this another exhaust gas purification catalyst as a catalyzer, with the exhaust gas purification catalyst in downstream side as the quadric catalysis agent.

Like this; In this first form; This another exhaust gas purification catalyst also is configured in the inner space of gas exhaust manifold; Therefore size, the shape with gas exhaust manifold remains existing size, shape invariance, can keep the compactedness of motor, also can avoid complex-shapedization that makes motor whole.And in the exhaust passageway in this gas exhaust manifold, exhaust is divided into two stages by catalyzer and quadric catalysis agent and purifies, and therefore can improve purifying property.

In above-mentioned first form of above-mentioned motor, make an above-mentioned catalyzer freely with respect to above-mentioned gas exhaust manifold loading and unloading.

Why making a catalyzer like this with respect to the gas exhaust manifold loading and unloading freely, is that the replacing frequency of the replacing frequency ratio quadric catalysis agent of a catalyzer is high because a life of catalyst that is exposed in the higher exhaust of temperature is shorter than quadric catalysis agent.That is,, therefore need when catalyzer of each replacing, not carry out numerous and diverse operation with respect to cylinder cap, silencing apparatus dismounting gas exhaust manifold through changing catalyzer one time with respect to catalyzer of gas exhaust manifold loading and unloading.In addition, if can not load and unload catalyzer one time with respect to gas exhaust manifold, then when needs are changed a catalyzer, need to change whole Exhaust gas purifying device, the life-span grows than catalyzer and also effective quadric catalysis agent also must be changed.In the present invention, through making a catalyzer freely, also can avoid as above-mentioned, changing in vain the quadric catalysis agent with respect to the gas exhaust manifold loading and unloading.

In second form of above-mentioned motor; Offer the insertion mouth in the side of above-mentioned gas exhaust manifold; First end through with above-mentioned exhaust gas purification catalyst is inserted in this gas exhaust manifold via this insertion mouth; This exhaust gas purification catalyst is configured in this gas exhaust manifold, is fixed with lid, be installed on the outer surface of this gas exhaust manifold this this insertions mouth of lid sealing at second end of the side opposite of this exhaust gas purification catalyst with this first end.

Like this; In this second form; Exhaust gas purification catalyst constitutes as cartridge (cartridge); Only, then this lid is installed on the outer surface of gas exhaust manifold, just can simply exhaust gas purification catalyst be assemblied in the gas exhaust manifold through this first end being inserted in the gas exhaust manifold via this insertion mouth; The lid that only makes the outside that is configured in gas exhaust manifold in addition just can be extracted exhaust gas purification catalyst and unload from gas exhaust manifold from this insertion mouth simply away from move with inserting mouth.That is, need not just can change exhaust gas purification catalyst, therefore can improve the maintainability of exhaust gas purification catalyst with respect to cylinder cap and silencing apparatus loading and unloading gas exhaust manifold.

In above-mentioned second form of above-mentioned motor; Above-mentioned first end of above-mentioned exhaust gas purification catalyst is the shape that is complementary with above-mentioned relief opening; Through the above-mentioned exhaust entrance of this first end via above-mentioned gas exhaust manifold is inserted in this relief opening, this exhaust gas purification catalyst is supported on this cylinder cap.

Like this; Through gas exhaust manifold as the inner space of exhaust passageway in dispose exhaust gas purification catalyst on the delivery temperature position the most; Can at utmost bring into play the purifying ability (oxidability) of exhaust gas purification catalyst, promote the minimizing effect of exhaust emission.And; Lid on second end that fixedly is located at exhaust gas purification catalyst is installed on the outer surface of gas exhaust manifold; On the other hand with second end of exhaust gas purification catalyst to be embedded in state support in the relief opening in cylinder cap; Therefore utilize the two supports exhaust gas purification catalyst of facing, can exhaust gas purification catalyst rocked, or the exhaust leakage takes place.

In above-mentioned second form of above-mentioned motor, above-mentioned lid has lip part at peripheral part, and this lip part and above-mentioned gas exhaust manifold all are anchored on above-mentioned cylinder cap.

Thus, can load and unload gas exhaust manifold and exhaust gas purification catalyst integratedly, improve maintainability with respect to cylinder cap.Promptly; The lip part that is fixedly installed on the lid on the exhaust gas purification catalyst is anchored on the double terminal operation that carries out gas exhaust manifold of an operation of cylinder cap to cylinder cap; On the other hand, utilize to remove the fastening operation to cylinder cap of this lip part, also can remove fastening to cylinder cap of gas exhaust manifold.Like this, can reduce and be used to make Exhaust gas purifying device operation quantity that is connected with cylinder cap and the operation quantity that is used for unloading Exhaust gas purifying device from cylinder cap.

In the 3rd form of above-mentioned motor; Above-mentioned gas exhaust manifold has at least two housing structures; These at least two housing structures by with as the parallel face of flow direction of exhaust gases in the above-mentioned exhaust passageway of the inner space of this gas exhaust manifold and be engaged with each other; On the internal surface of this gas exhaust manifold, dispose the maintenance guide, this maintenance guide is used for when these at least two housing structures are engaged with each other, locating this exhaust gas purification catalyst.

Like this; In the 3rd form; When the joint operation of carrying out these at least two housing structures; Can utilize to keep guide to keep this exhaust gas purification catalyst, make the assembling facilitation to gas exhaust manifold of exhaust gas purification catalyst at the inner assigned position location exhaust gas purification catalyst of gas exhaust manifold.In addition; When these at least two housing structures can be separated; Utilize separating of housing structure, can easily unload, can new exhaust gas purification catalyst be assembled in the gas exhaust manifold in above-mentioned technology simply by the exhaust gas purification catalyst that keeps guide to keep.

In the 4th form of above-mentioned motor; Periphery at above-mentioned exhaust gas purification catalyst is fixed with the catalyzer flange; The rectangular parting plane of flow direction of exhaust gases in the above-mentioned exhaust passageway of the inside of above-mentioned gas exhaust manifold utilization and this gas exhaust manifold; Can be separated into two housing structures; The end periphery of facing with this parting plane at this housing structure respectively is formed with the housing flange, through this catalyzer flange of clamping between two these housing flanges, this exhaust gas purification catalyst is fixed in this gas exhaust manifold.

Like this, in the 4th form, be separated from each other, can decompose gas exhaust manifold, can easily load and unload exhaust gas purification catalyst, improve maintainability through housing flange with two housing structures.In addition, through the catalyzer flange that constitutes one with exhaust gas purification catalyst is set, can prevent the clearance leakage of exhaust between the housing flange between the housing flange of two housing structures.

In the 5th form of above-mentioned motor, above-mentioned exhaust gas purification catalyst has thermoinsulation material in periphery.

Like this; In the 5th form; Through utilizing the gap between thermoinsulation material landfill gas exhaust manifold and the exhaust gas purification catalyst; Suppress the decrease of temperature of exhaust gas purification catalyst, thereby can farthest bring into play the exhaust gas purification ability of exhaust gas purification catalyst, improve the minimizing effect of exhaust emission.

Description of drawings

Fig. 1 is the plan view of structure of the Exhaust gas purifying device of expression first mode of execution of the present invention.

Fig. 2 is the A-A sectional view among Fig. 1.

Fig. 3 is the B-B sectional view among Fig. 1.

Fig. 4 is the plan view of structure of the Exhaust gas purifying device of expression second mode of execution of the present invention.

Fig. 5 is the plan view of structure of the Exhaust gas purifying device of expression second mode of execution of the present invention.

Fig. 6 is the C-C sectional drawing among Fig. 4.

Fig. 7 is the plan view of structure of the Exhaust gas purifying device of expression the 3rd mode of execution of the present invention.

Fig. 8 is the plan view of structure of the Exhaust gas purifying device of expression the 3rd mode of execution of the present invention.

Fig. 9 is the D-D sectional view among Fig. 7.

Figure 10 is the integrally-built stereogram of the motor of expression mode of execution of the present invention.

Figure 11 is the sectional view of internal structure of the motor of expression mode of execution of the present invention.

Description of reference numerals

100, motor; 3, cylinder cap; 34, relief opening; 5, gas exhaust manifold; 6, silencing apparatus; 10, Exhaust gas purifying device; 105, gas exhaust manifold; 12a, exhaust entrance; 11c, exhaust outlet; 11b, insertion mouth; 41, exhaust gas purification catalyst (catalyzer); 42, exhaust gas purification catalyst (quadric catalysis agent); 43, lid; 43a, lip part; 110, Exhaust gas purifying device; 205, gas exhaust manifold; 112a, exhaust entrance; 111c, exhaust outlet; 111b, insertion mouth; 20, catalyst structure; 21, lid; 23, exhaust gas purification catalyst; 210, Exhaust gas purifying device; 305, gas exhaust manifold; 81, upper reaches housing; 81a, insertion mouth; 71, housing flange; 82, downstream housing; 72, housing flange; 120, catalyst structure; 23, exhaust gas purification catalyst; 126, catalyzer flange.

Embodiment

About the overall structure of the motor of a mode of execution of the present invention, use Figure 10 and Figure 11 to explain that single cylinder DENG of air-cooled type is mode of execution.In addition, in following explanation, be " the place ahead ", towards this ground, the place ahead setting left and right side and rear with the direction setting of arrow F among the figure.Hollow arrow among the figure representes that thick arrow is represented the flow direction of exhaust to the assembly direction of gas exhaust manifold 5 assembling exhaust gas purification catalysts and its associated components.

The main structure of the main body of motor 100 is: the bottom constitutes crankcase 1, and top constitutes the cylinder body 2 that is formed with cylinder 2a in inside, and this external this cylinder body 2 is provided with cylinder cap 3.Central authorities in cylinder body 2 form cylinder 2a along the vertical direction, in this cylinder 2a, have taken in piston 4.

The chamber that will be surrounded by cylinder 2a, piston 4 and cylinder cap 3 can dispose suction valve 31 and outlet valve 32 along the vertical direction slidably as the firing chamber cylinder cap 3 above cylinder 2a in, dispose nozzle (omit and illustrate) on the next door of suction valve 31.The inside of the cylinder cap 3 above cylinder 2a is formed with suction port 33 and relief opening 34, can utilize suction valve 31 to open and close suction port 33 with respect to the firing chamber, can utilize outlet valve 32 to open and close relief opening 34 with respect to the firing chamber.Suction port 33 is connected with air-strainer 8 via intake manifold 8a.Relief opening 34 is connected with silencing apparatus 6 via gas exhaust manifold 5.

In the periphery of cylinder cap 3, dispose gas exhaust manifold 5 forwardly, dispose silencing apparatus 6 in a side (being the right side) in this mode of execution, dispose fuel tank 7 at opposite side (being the left side) in this mode of execution, dispose air-strainer 8 in the wings.Has exhaust entrance in an end of gas exhaust manifold 5 (being the left part) in this mode of execution; Has exhaust outlet in the other end of gas exhaust manifold 5 (being the right part) in this mode of execution; This end is connected with cylinder cap 3 and this exhaust entrance is connected with above-mentioned suction port 34; This other end is connected with this silencing apparatus 6 and makes and be connected in this exhaust outlet and this silencing apparatus 6, thereby in this gas exhaust manifold 5, constitute the exhaust passageway that exhaust is flowed to this exhaust outlet from this exhaust entrance.In the motor 100 of this mode of execution, the flow direction that makes the exhaust in this gas exhaust manifold 5 is that left and right directions disposes relief opening 34, this gas exhaust manifold 5 and this silencing apparatus 6 in this cylinder cap 3 (towards right).The temperature of the exhaust of high temperature is descended, and, via outlet pipe this exhaust is discharged in the atmosphere from silencing apparatus 6 to relief opening 34, gas exhaust manifold 5 and silencing apparatus 6 these exhausts of guiding.

Next, use Fig. 1 to Fig. 3 that the structure of the Exhaust gas purifying device 10 of first mode of execution is described.Exhaust gas purifying device 10 mainly by gas exhaust manifold 105 be configured in constituting in this gas exhaust manifold 105 as the catalyzer 41 and the quadric catalysis agent 42 of exhaust gas purification with oxidation catalyst.Gas exhaust manifold 105 has the basic structure as above-mentioned gas exhaust manifold 5; The inner space of gas exhaust manifold 105 as being used for from the exhaust passageway of relief opening 34 to silencing apparatus 6 directing exhaust gas, and is also used as the housing of the exhaust

gas purification catalyst

41,42 in the Exhaust gas purifying device 10.In gas exhaust manifold 105, be formed in as described above in the exhaust passageway between exhaust entrance and the exhaust outlet; A catalyzer 41 is configured in the upstream side (exhaust entrance side) of the flow direction of exhaust, and quadric catalysis agent 42 is configured in the downstream side (exhaust outlet side) of the flow direction of exhaust.

The catalyst body of catalyzer 41 and quadric catalysis agent 42 is the monolithic substrates that are made up of the such pottery of steinheilite; In order to increase their specific surface area, the polygonal cross section that the partition wall that makes catalyzer 41 and quadric catalysis agent 42 have the porous matter of clathrate utilized or honeycomb shape is separated.Entrance and exit through alternately sealing exhaust in many through holes that are formed parallel to each other constitutes above-mentioned partition wall.And this partition wall load has catalytic metals such as platinum, therefore has the oxidation catalysis function.

In addition, the material of monolithic substrate adopts steinheilite in this mode of execution, but not special the qualification also can be adopted silicon carbide or stainless steel etc.In addition, as long as the structure of catalyst body forms the structure that is used to increase specific surface area, for example also can be the net ring (mesh ring) that disposes many cancellate sheet metal dividers.In addition,, in this mode of execution, adopt platinum, but this also not special qualification also can be adopted other metals such as palladium, rhodium, iridium, perhaps also can make up multiple metal as catalytic metal as catalytic metal.

A catalyzer 41 and the quadric catalysis agent 42 of above-mentioned such structure utilizes the partition wall of porous matter to catch the PM (suspended particulate matter) in the exhaust.Meanwhile, catalyzer 41 and quadric catalysis agent 42 utilize the carrier of above-mentioned catalytic metal, the nitrous oxide in the oxidation exhaust (NO), carbon monoxide (CO) and hydrocarbon (HC) etc., generation carbon dioxide, water and nitrogen dioxide NO ₂Deng.Then, be utilized in the NO that in exhaust, generate in a large number under the effect of catalytic metal ₂Deng the oxidability that is had and the high temperature of the exhaust that produces by the next door of relief opening 34, with the above-mentioned PM continuity ground oxidation that traps and the removal of burning.

Gas exhaust manifold 105 is to merge first housing structure 11 with second housing structure 12 and integral body forms the cylindrical shell of peripheral cross-section that the rear end has the roughly D font of vertical straight line shape.Through utilize welding to wait to connect two

housing structures

11,12 around each other, first housing structure 11 and second housing structure 12 integratedly interfix.

In addition, the shape of gas exhaust manifold 105 is unqualified, and integral body can the side's of being tubular, the forming shape that is easy to such as cylindric.In addition, also can be through constituting the gas exhaust manifold that can separate each other with two dividing members of connections such as bolt.In addition, also can constitute gas exhaust manifold, in addition, make gas exhaust manifold with also can being separated into dividing member more than three through the dividing member that engages more than three.

First housing structure 11 is the members that constitute the front portion of gas exhaust manifold 105, constitutes circular-arc (analysing and observe the part that is roughly the C font) in the peripheral cross-section that is seen as D font roughly from the side of above-mentioned gas exhaust manifold 105.In detail; First housing structure, 11 integral body are analysed and observe to look from side and are comprised upper end portion and underpart and the planar front end of vertical that parallel level is planar; Part between the planar front end of upper end portion that level is planar and vertical is circular-arc extension setting, and the part between the planar front end of underpart that level is planar and vertical is circular-arc extension setting.First housing structure 11 become with axial direction motor 100 left and right directions be configured in the place ahead of cylinder cap 3.

Partly be seen as rectangle midway about first housing structure 11, have the top and bottom of left and right horizontal from the front.Partly see after about this midway and state, be used to keep quadric catalysis agent 42.The left part of first housing structure 11 (being seen as the right part from the front) sealing, the left forward on the next door, left part of first housing structure 11 is seen from the front to be formed with relief opening 34 with aliging and is inserted a mouthful 11b.This insertion mouthful 11b sees after and states, and is used for a catalyzer 41 is packed in the gas exhaust manifold 105.The extension of first housing structure 11 is arranged on the above-mentioned part of rectangle and the part between above-mentioned left part (being seen as the right part from the front) of being seen as from the front; Comprise that to upper end portion that left bottom (being seen as the lower right from the front) tilts and the underpart that tilts to upper right (being seen as the upper left side from the front), this part is looked from the front and formed to the such shape of relief opening 34 constrictions.

Rear end at first housing structure 11; The peripheral portion of the part of the upper end portion of the above-mentioned part that is seen as rectangle from the front and underpart and the above-mentioned shape that is seen as constriction from the front is as lip part 11a; It is tabular to form vertical laterally highlightedly, and the ear end face that is surrounded by this lip part 11a of first housing structure 11 is uncovered.Left part (being seen as right portions from the front) expansion of mouthful 11b is inserted in the encirclement of this lip part 11a, on this left part of having expanded, offers

bolt hole

63,63 from this insertions mouth 11b sky with opening predetermined distance.

In addition; Fig. 5 of the gas exhaust manifold 205 of second mode of execution of stating after the reference expression; The front end of first housing structure 11 (first housing structure 111 that is equivalent to Fig. 5); Extend and to be arranged on the above-mentioned right side (being seen as the left side from the front) that is seen as the right-hand member (being seen as left end) of the upper end of the part of rectangle, the lip part 11a of lower end (the lip part 111a that is equivalent to Fig. 5) from the front of being formed on of first housing structure 11, between the right-hand member (being seen as left end) of the front end of this first housing structure 11 and this lip part 11a, be formed with to overlook and be seen as skewed right part (being seen as the left part) from the front from the front from the front.Like this, first housing structure 11 (is seen as the left part from the front) in the right part and has the open end to the inclination of oblique rear, sees after and states, with the exhaust outlet 11c (the exhaust outlet 111c that be equivalent to Fig. 5) of this open end as gas exhaust manifold 105.Above-mentioned the overlooking of first housing structure 11 is seen as skewed right part (being seen as the left part from the front) is inserted in the silencing apparatus 6, thus exhaust outlet 11c is configured in the silencing apparatus 6 via the insertion mouth 6a of the left surface that is opened in silencing apparatus 6 (being seen as right flank) from the front.

Second housing structure 12 is the tabular member that constitutes the rearward end of gas exhaust manifold 105 along the configuration of the front surface of cylinder cap 3, constitutes the vertical wire portion in the peripheral cross-section that is seen as D font roughly from the side of above-mentioned gas exhaust manifold 105.In other words; The front-end face of the vertical shape of second housing structure 12 is configured for the mating face that engages with first housing structure 11; First housing structure 11 and second housing structure 12 constitute gas exhaust manifold 105 by being engaged with each other with the mating face that disposes abreast as the flow direction of exhaust gases in the inner space of the gas exhaust manifold 105 of exhaust passageway.

The shape of seeing from the front of second housing structure 12 is consistent with the shape of seeing from the front the above-mentioned right part (being seen as the left part from the front) in being configured in silencing apparatus 6 of first housing structure 11, and the lip part 11a front-back of the outer periphery portion of second housing structure 12 and said first shell member 11 is overlapping over the ground.In addition; The expansion of the left side of second housing structure 12 (being seen as the right side) outer periphery portion from the front; Form the roughly the same shape of having seen from the front with the above-mentioned expansion of first housing structure 11 of left part; In this outer periphery portion that has expanded, see from the front to be formed with

bolt hole

62,62 in the ground that can align with the

bolt hole

63,63 of above-mentioned lip part 11a.And; See left part (being seen as right portions) from the front at second housing structure 12 that is surrounded by this left side (being seen as the right side) outer periphery portion from the front from the front; Be formed with from the front and see the opening that can align, with the exhaust entrance 12a of this opening as gas exhaust manifold 105 with above-mentioned relief opening 34 and above-mentioned insertion mouth 11b.

Like this; Make under bolt hole 63 and the state that bolt hole 62 aligns; The outer periphery portion that makes the lip part 11a and second housing structure 12 is superimposed and utilize welding joint, thereby makes first housing structure 11 and second housing structure 12 integrated each other, constitutes gas exhaust manifold 105.In addition; Also can weld; But utilize the bolton mode to come the lip part 11a of fastening first housing structure 11 and the outer periphery portion of second housing structure 12, thereby can by as stated with gas exhaust manifold 105 in (front-end face that is equivalent to this second housing structure 12) mating face of disposing abreast of the flow direction of exhaust separate first housing structure 11 and second housing structure 12.

It is in order to make exhaust be configured in the hole of the left rearward (being seen as right back portion from the front) of gas exhaust manifold 105 from being formed on relief openings 34 in the cylinder cap 3 and flowing in the gas exhaust manifold 105 that above-mentioned that kind is formed at exhaust entrance 12a on second housing structure 12.Exhaust entrance 12a forms and the roughly the same shape of the opening shape of seeing from the front of above-mentioned relief opening 34 (this mode of execution for circular), see from the front, exhaust entrance 12a be formed on can with relief opening 34 roughly on the positions aligning.

The insertion mouth 11b that above-mentioned that kind is formed at first housing structure 11 is the hole that is configured in the side (front surface) of gas exhaust manifold 105 for the taking-up of a catalyzer 41 is put into.Insert mouthful 11b for the roughly the same shaped aperture of the shape of seeing from the front of relief opening 34 and exhaust entrance 12a (this mode of execution for circular), insert mouthful 11b see from the front be formed on can with relief opening 34 and exhaust entrance 12a roughly on the positions aligning.

The exhaust outlet 11c that above-mentioned that kind is formed at first housing structure 11 is in order to make the exhaust of having passed through quadric catalysis agent 42 flow out to the hole that is configured in the right part (being seen as the left part from the front) of gas exhaust manifold 105 in the silencing apparatus 6 from gas exhaust manifold 105; Be inserted in the silencing apparatus 6 via inserting a mouthful 6a through the right part of above-mentioned that kind ground with

gas exhaust manifold

105,11c is configured in the silencing apparatus 6 with this exhaust outlet.

The part that is seen as rectangle from the front of the said first shell member 11 and second housing structure 12 is the parts of taking in the quadric catalysis agent 42 the gas exhaust manifold 105.In gas exhaust manifold 105, dispose a plurality of (being 8 in this mode of execution) and keep guide 51, to keep quadric catalysis agent 42.Keeping guide 51 is from each housing structure 11,12 outstanding tab that are provided with, can form with each housing structure 11,12, also can with each housing structure 11,12 respectively independently member be fixed at each housing structure 11,12 and constitute.4 keep guide 51 with the mode of the right ends face butt of the front portion that is configured in the quadric catalysis agent 42 in the gas exhaust manifold 105, open predetermined distance ground along left and right directions and above-below direction sky each other from the vertical front end of first housing structure 11 and rearward give prominence to.On the other hand, 4 holding part materials 51 with the mode of the right ends face butt at the rear portion that is configured in the quadric catalysis agent 42 in the gas exhaust manifold 105, open predetermined distance ground from second housing structure 12 along left and right directions and above-below direction sky and forwards give prominence to.Like this; On the internal surface of the internal surface of first housing structure of facing with the inner space as exhaust passageway of gas exhaust manifold 105 11 and second housing structure 12, can be provided with keeping and keep guide 51,51...... being configured in quadric catalysis agent 42 in the gas exhaust manifold 105.

In this mode of execution; Keep guide 51 and keep guides 51 to see the configuration of alignment ground from the front from outstanding 4 of first housing structure 11 from outstanding 4 of second housing structure 12; Dispose the maintenance guide 51 of first housing structure 11 and the maintenance guide 51 of second housing structure 12 down but also can take a fancy to from the front with staggering; In addition, keep the quantity of guide 51 also unqualified.According to size, the shape of quadric catalysis agent 42, can keep these quadric catalysis agent 42 ground to set preferably and keep configuration mode, the quantity of guide 51 to get final product.

Below, in gas exhaust manifold 105, pack into catalyzer 41 and quadric catalysis agent 42 are described.

One time catalyzer 41 is cylindric, forms to be inlaid in to insert in a mouthful 11b, exhaust entrance 12a and the relief opening 34.Thereby, form the size (diameter of rounded face) of a catalyzer 41 according to relief opening 34, exhaust entrance 12a and the size (being seen as the diameter of circular open from the front) of inserting mouthful 11b.

On an end face (front-end face) of a catalyzer 41, be fixed with lid 43.The other end (ear end face) that catalyzer 41 will be fixed with a side opposite with this end face (front-end face) of this lid 43 is inserted in the gas exhaust manifold 105 via above-mentioned insertion mouth 11b, thereby is configured in the inner space of the above-mentioned exhaust passageway of conduct of this gas exhaust manifold 105.This other end (rearward end) of a catalyzer 41 is embedded in the relief opening 34 via exhaust entrance 12a.Thereby this other end (rearward end) of a catalyzer 41 is supported on cylinder cap 3.

Above-mentioned lid 43 forms the insertion mouth 11b and insertion mouthful 11b part on every side that covers first housing structure 11.Periphery is formed with lip part 43a on the left side of lid 43 (being seen as the right side from the front).On lip part 43a to see that from the front mode of aliging with the

bolt hole

63,62 of gas exhaust manifold 105 respectively is formed with bolt hole 64,64.The mode of on cylinder cap 3, aliging with the

bolt hole

63,62 of seeing the gas exhaust manifold 105 that is connected with this cylinder cap 3 respectively from the front in addition, is formed with bolt hole 61,61.

Above-mentioned left part (being seen as the right part from the front) with gas exhaust manifold 105 is configured under the state in cylinder cap 3 the place aheads; Above-mentioned that kind ground is inserted into a catalyzer 41 in the gas exhaust manifold 105 via inserting mouthful 11b and exhaust entrance 12a; When making the rearward end of a catalyzer 41 be embedded in the relief opening 34; Lid 43 is installed on the outer surface of gas exhaust manifold 105 (first housing structure 11) with sealing this insertion mouthful 11b naturally; The bolt hole 64 of lip part 43a aligns with the bolt hole of gas exhaust manifold 105 63,62, and also aligns with the bolt hole 61 of cylinder cap 3 via this bolt hole 63,62.Make each bolt hole 61,62,63,64 alignment ground configuration gas exhaust manifold 105 on the preceding outer surface of cylinder cap 3 like this, outer surface configuration lid 43 before the side of the left side of gas exhaust manifold 5 (being seen as the right side) from the front.In addition, in clamping between the ear end face of the preceding outer surface of cylinder cap 3 and gas exhaust manifold 105 (second housing structure 12) and between the preceding outer surface of gas exhaust manifold 105 (first housing structure 11) and the lid 43 packing ring (omitting diagram) is arranged.Under this state, through each bolt 65 being screwed in the bolt hole 61,62,63,64 of alignment, with the lid 43 and fastening in the lump being fixed on the cylinder cap 3 of gas exhaust manifold 105 (housing structure 11,12) of a catalyzer 41.That is, in gas exhaust manifold 105, pack operation and the lid 43 of a catalyzer 41 into to the fastening double operation that is connected from gas exhaust manifold 105 to cylinder cap 3 that carry out of terminal operation of cylinder cap 3.

Be enclosed in a catalyzer 41 in the gas exhaust manifold 105 like this; Rearward end to be embedded in as stated in the relief opening 34 is supported on cylinder cap 3; On the other hand, front end is via lid 43 and the gas exhaust manifold 105 fastening cylinder caps 3 that are fixed in, and that avoids therefore that vibration by motor 100 produces rocks; Thereby the leakage of exhaust can not take place, so guarantee good exhaust gas purification efficient.And; Spread all over the partly configuration on the exhaust entrance 12a next door in the exhaust passageway in relief opening 34, exhaust entrance 12a and this gas exhaust manifold 105, purified treatment is carried out in the exhaust that flow into the high heat in this exhaust passageway from relief opening 34 via exhaust entrance 12a.

Quadric catalysis agent 42 form be fit to be maintained at as stated by first housing structure 11 and second housing structure 12 what be seen as gas exhaust manifold 105 that the part of rectangle constitutes from the front is the shape in the part of rectangle from the front.In this mode of execution, the shape of quadric catalysis agent 42 is seen as rectangle from the front, is seen as long up and down substantially elliptical from the side.In addition; Space utilization thermoinsulation material 25 sealings between the internal surface of the outer circumferential face of quadric catalysis agent 42 and gas exhaust manifold 105 (first housing structure 11 and second housing structure 12), the boundary dimension of quadric catalysis agent 42 is set according to the configuration mode of this thermoinsulation material 25.In addition, can adopt glass wool etc. as thermoinsulation material 25.

For quadric catalysis agent 42 is encased in the gas exhaust manifold 105; Before engaging first housing structure 11 and second housing structure 12; Under the state of maintenance guide 51 butts of the right ends face that makes quadric catalysis agent 42 and first housing structure 11, quadric catalysis agent 42 is remained in this housing structure 11 or housing structure 12.At this moment, in first housing structure 11, thermoinsulation material 25 is installed around quadric catalysis agent 42.Then; Cover quadric catalysis agent 42 and thermoinsulation material 25 ground in first housing structure 11; Second housing structure 12 is covered in first housing structure 11, thus the maintenance guide 51 that makes second housing structure 12 also naturally with the right ends face butt of quadric catalysis agent 42.And,, keeping the state of quadric catalysis agent 42 to accomplish this operation of packing in inside with gas exhaust manifold 105 through utilizing the outer periphery portion of the lip part 11a and second housing structure 12 that engage first housing structure 11 as described above.

Be seen as skewed right part (being seen as the left part) and be inserted in the silencing apparatus 6 through gas exhaust manifold 105 above-mentioned overlooked from the front; Exhaust outlet 11c is configured in the silencing apparatus 6, and will be enclosed in (silencing apparatus 6 outside) exhaust passageway of the upstream side that is arranged in exhaust outlet 11c in the stream that quadric catalysis agent 42 in the gas exhaust manifold 105 are arranged on exhaust.On the other hand, catalyzer 41 is enclosed in the gas exhaust manifold 105 via inserting a mouthful 11b as described above, utilizes packing into of this catalyzer 41, and the left part (being seen as the right part from the front) of gas exhaust manifold 105 is fixed on the cylinder cap 3.Like this, the gas exhaust manifold 105 that is built-in with catalyzer 41 and quadric catalysis agent 42 is folded between the cylinder cap 3 and silencing apparatus 6 of motor 100 as Exhaust gas purifying device 10.

In the Exhaust gas purifying device 10 in being installed in motor 100 like this, the process of exhaust in the inner space that flow into gas exhaust manifold 105 from relief opening 34 via exhaust entrance 12a, at first through a catalyzer 41.Passed through in the process that an exhaust behind the catalyzer 41 flows through in the exhaust passageway that the inner space by gas exhaust manifold 105 constitutes, through quadric catalysis agent 42.After having passed through quadric catalysis agent 42, exhaust is directed in the silencing apparatus 6 from exhaust outlet 11c.

One time catalyzer 41 becomes with respect to gas exhaust manifold 105 loading and unloading structure freely; Therefore in the exhaust gas purification ability drop of Exhaust gas purifying device 10 situation under; Through changing catalyzer 41 one time, can recover the exhaust gas purification ability of Exhaust gas purifying device 10 simply.That is, through unloading

bleeder screw

65,65, make lid 43 away from the outer surface of gas exhaust manifold 105 move, can extract a catalyzer 41 with this lid 43 one from inserting mouthful 11b.Unload an old catalyzer 41 from gas exhaust manifold 105 like this, simply.Then, can a new catalyzer 41 be packed in gas exhaust manifold 105 and the cylinder cap 3 simply according to above-mentioned main points.

A catalyzer 41 that in the stream of exhaust, is configured in the upstream side of quadric catalysis agent 42 is exposed in the exhaust of high heat; Be in short tendency of life-span; Therefore from this viewpoint, make a catalyzer 41 load and unload the maintenance that helps Exhaust gas purifying device 10 freely with respect to gas exhaust manifold 105.On the other hand; In the Exhaust gas purifying device 10 of this mode of execution; First housing structure 11 and second housing structure 12 that quadric catalysis agent 42 is soldered joint are enclosed in the gas exhaust manifold 105 clampingly; Therefore can not unload quadric catalysis agent 42 from gas exhaust manifold 105, but Exhaust gas purifying device 10 can be separated, for example utilize the bolton mode to connect first housing structure 11 and second housing structure 12 each other; They can be separated, and that utilizes this first housing structure 11 and second housing structure 12 separately takes out quadric catalysis agent 42.

Next, use Fig. 4 to Fig. 6 that the structure of the Exhaust gas purifying device 110 of second mode of execution is described.Represent the member identical with the identical reference character of reference character that first mode of execution is used with the member of first mode of execution.Exhaust gas purifying device 110 mainly is made up of gas exhaust manifold 205 and the exhaust gas purification catalyst (oxidation catalyst) that is configured in the inside of gas exhaust manifold 205 23.That is, gas exhaust manifold 205 has the basic structure as above-mentioned gas exhaust manifold 5, and is also used as the housing of the exhaust gas purification catalyst 23 in the Exhaust gas purifying device 110.In addition, exhaust gas purification catalyst 23 is enclosed in respect in the gas exhaust manifold 205 loading and unloading catalyst structure 20 freely integratedly.

Gas exhaust manifold 205 mainly is made up of first housing structure 111 and second housing structure 112.Connect fixing first housing structure 111 and second housing structure 112 through utilizing welding to wait; Gas exhaust manifold 205 analysed and observe to look from side constitute the square tubular of essentially rectangular (with reference to Fig. 6); But the shape of gas exhaust manifold 205 is unqualified, can form various shapes according to the design of motor 100.For example, also can this shape be formed the shape of molded housing member more easily.In addition, also can utilize connection housing structures such as bolt can gas exhaust manifold 205 be separated into plural housing structure each other.

First housing structure 111 is the members that are equivalent to first housing structure 11 of first mode of execution; Have the front shape identical (Fig. 4 with reference to) with this first housing structure 11; Lip part 111a with the lip part 11a that is equivalent to this first housing structure 11; The exhaust outlet 111c that is equivalent to exhaust outlet 11c is equivalent to the

bolt hole

63,63 of bolt hole 63,63.Second housing structure 112 is the members that are equivalent to second housing structure 12 of first mode of execution; Have the shape identical with this second housing structure 12; Exhaust entrance 112a with the exhaust entrance 12a that is equivalent to this second housing structure is equivalent to the

bolt hole

62,62 of bolt hole 62,62.Identical with second housing structure 12 joint each other ground with first housing structure 11; Along the left and right directions of motor 100, promptly with exhaust passageway in the vertical front surface of second housing 112 that extends abreast of the flow direction of exhaust constitute the mating face; Utilizing welding to wait makes the lip part 111a of first housing structure 111 engage with the outer periphery portion of this front surface; First housing structure 111 and second housing structure 112 are engaged with each other by this mating face, constitute gas exhaust manifold 205.

When being installed in gas exhaust manifold 205 in the motor 100, same with gas exhaust manifold 105, be inserted in the silencing apparatus 6 through right part (being seen as the left part) from the front with gas exhaust manifold 205, exhaust outlet 111c is configured in the silencing apparatus 6.On the other hand; Dispose exhaust entrance 112a with relief opening 34 with aliging; And the

bolt hole

62,63 of gas exhaust manifold 205 is alignd with the bolt hole 61 of cylinder cap 3; Bolt 65 is screwed into respectively in the

bolt hole

61,62,63, thereby the left part (being seen as the right part from the front) of gas exhaust manifold 205 is fixed on the cylinder cap 3.

The part of the vertical front-end face of first housing structure 111 in gas exhaust manifold 205 offers inserts a mouthful 111b.This sacrificial vessel has the catalyst structure of stating behind the exhaust gas purification catalyst 23 20 to take out the hole of putting into.In addition; As the container of taking in exhaust gas purification catalyst 23; Gas exhaust manifold 205 has the part that is seen as rectangle from the front of the part of the maintenance quadric catalysis agent 42 that is equivalent in the gas exhaust manifold 105, and that inserts that mouthful 111b is opened in this gas exhaust manifold 205 is seen as the front-end face the part of rectangle from the front.

On first housing structure 111; The 111d of mounting flange portion, 111d are to roughly form at the peripheral end up and down that inserts mouthful 111b outside the vertical outstandingly, at spaced apart be provided with bolt hole 111e, the 111e...... of left and right sides peripheral end to stipulate of the 111d of this mounting flange portion, 111d and insertion mouth 111b.The front surface of the 111d of these mounting flange portions is the face along the left and right directions extension of motor 100; Promptly; To with gas exhaust manifold 205 in exhaust passageway in the parallel face of flow direction of exhaust; These faces constitute with after the mating face that engages of the lid 21 of the catalyst structure 20 stated, that is, and the mating face that gas exhaust manifold 205 engages with catalyst structure 20.

In gas exhaust manifold 205, dispose two maintenance guide 13 up and down as the tab that is used to keep exhaust gas purification catalyst 23.When the catalyst structure that will have exhaust gas purification catalyst 23 20 is assembled in the gas exhaust manifold 205; Two left and right sides middle part butts that keep guide 13 and catalyst structure 20; The gap that landfill is made up of gas exhaust manifold 205 and catalyst structure 20 and guarantee tightness, and keep catalyst structure 20 in position.Specify with reference to Fig. 5; In gas exhaust manifold 205, between the internal surface of second housing structure 112 of the internal surface of the horizontal upper end portion of first housing structure 111, underpart and vertical shape, be formed with and be seen as rectangular-shaped bight, back upper place and bight, the rear lower side from the side.On the other hand; The back upper place portion and the rear lower side portion of catalyst structure 20 (pillar of stating after being in detail 22) are seen as circular-arc from the side; Therefore after being assembled to catalyst structure 20 in the gas exhaust manifold 205, this of catalyst structure 20 be seen as circular-arc back upper place portion and rear lower side portion and gas exhaust manifold 205 from the side this be seen as between rectangular-shaped bight, back upper place and the bight, the rear lower side residual gapped from the side.These dispose maintenance guide 13 landfills of upper and lower with gap.

That is, as shown in Figure 5, two of the upper and lower predetermined distance ground that keep guides 13 to vacate above-below direction between the two, the internal surface (front surface) of the vertical shape of facing from the exhaust passageway with in the gas exhaust manifold 205 of second housing structure 112 is forwards given prominence to.The lower end of the upper end of the maintenance guide 13 of upside and the maintenance guide 13 of downside is a level; Internal surface (lower surface) butt of the horizontal upper end portion of the upper end of the maintenance guide 13 of upside and first housing structure 111, internal surface (upper surface) butt of the horizontal underpart of the lower end of the maintenance guide 13 of downside and first housing structure 111.Each keep guide 13 and catalyst structure 20 (being pillar 22 in detail) back upper place portion, rear lower side portion the part that is seen as circular shape from the side separately accordingly, have and be seen as circular-arc front from the side.Like this; Through make respectively keep guide 13 circular-arc front respectively be encased in gas exhaust manifold 205 in the back upper place portion and the rear lower side portion of left and right sides middle part of catalyst structure 20 engage; Keep the gap between guide 13,13 landfill gas exhaust manifolds 205 and the catalyst structure 20 as stated, the exhaust that prevents to pass through in the exhaust passageway in gas exhaust manifold 205 is from exhaust gas purification catalyst 23 leakages.

Next, the catalyst structure 20 that is built in the gas exhaust manifold 205 is described.Lid 21, pillar 22, exhaust gas purification catalyst 23, Sealing 24 and thermoinsulation material 25 are made up integratedly and constitute catalyst structure 20.Can catalyst structure 20 be inserted in the gas exhaust manifold 205 via inserting a mouthful 111b; And and be formed on the gas exhaust manifold 205 between first housing structure 111 and second housing structure 112 the inner space shape accordingly, form the shape of catalyst structure 20.

Lid 21 is to be used to seal the tabular member that inserts mouthful 111b.The top and bottom of lid 21 form catalyst structure 20 being encased under the situation in the gas exhaust manifold 205 with the upside that inserts mouthful 111b, the 111d of mounting flange portion of downside, the outer circumference end (top and bottom) of 111d roughly aligns.On the other hand, bolt hole 111e, the 111e...... around the left part of lid 21 and the right part covering insertion mouthful 111b extends about ground.And, on the lid 21 with

construction bolt hole

111e, 111e...... positions aligning on

offer bolt hole

21a, 21a.......

Pillar 22 is the tabular components that are configured in the rear of lid 21, and exhaust gas purification catalyst 23 is maintained in the space between pillar 22 and the lid 21.Pillar 22 is crooked matchingly with the shape of back surface, back upper place portion and the rear lower side portion of the exhaust gas purification catalyst 23 at the rear that is configured in lid 21.In detail, C font (the U font of laying across) forms pillar 22 through tabular member being bent into roughly.In addition; Make the upper and lower of pillar 22 outstanding to the place ahead of substantially horizontal; Make the front end of horizontal part on it crooked, make down the front end of horizontal part crooked, thereby form the tabular upper and lower lip part 22a of vertical that extends along left and right directions to the vertical below to the vertical top.Left part at this upper and lower lip part 22a reaches the right part to each other to each other, is formed with the tabular left and right lip part 22b of vertical that extends along the vertical direction.

The upper and lower lip part 22a of pillar 22 and left and right lip part 22b form the tetragonal frame shape that four limits with the front opening of pillar 22 are surrounded; Last at these

lip parts

22a, 22b, see with each bolt hole 21a from the front to offer bolt hole 22c with aliging.The front surface butt of the back surface of four limit portions through making lid 21 and the lip part 22a of

pillar

22,22b utilizes and is welded to connect this surface, back and front surface, makes lid 21 and pillar 22 integrated.In other words, lip part 22a, the 22b of pillar 22 become the part of lid 21.Be formed on the inner space of the catalyst structure 20 between lid 21 and the pillar 22; Owing in gas exhaust manifold 205, be provided as exhaust passageway; Therefore open along the left and right directions right ends of pillar 22 (promptly), in this space, dispose exhaust gas purification catalyst 23.

The catalyzer 41 that exhaust gas purification catalyst 23 and Exhaust gas purifying device 10 are used is identical with the structure of quadric catalysis agent 42.That is to say, be the monolithic substrate that is made up of the such pottery of steinheilite, has the oxidation catalysis function.Being enclosed in exhaust gas purification catalyst 23 in the catalyst structure 20 forms and sees it is rectangle from the front, sees it is long up and down oval in shape from the side.In the above-mentioned inner space of catalyst structure 20, exhaust gas purification catalyst 23 the internal surface of latter half of outer circumferential face and pillar 22 (be in detail the vertical shape rearward end interior (preceding) surface be seen as circular-arc back upper place portion, the internal surface of rear lower side portion from the side) butt state under installation.

In addition, in the inner space of this catalyst structure 20, be filled with the thermoinsulation material 25 of glass wool etc. in the space between the internal surface of outer circumferential face, pillar 22 and the lid 21 of the first half of exhaust gas purification catalyst 23.Thus; Prevent that the exhaust gas purification catalyst 23 of exhaust self-configuring in this space that in the inner space as this catalyst structure 20 of exhaust passageway, passes through from leaking; In addition; Utilize the heat insulating function of thermoinsulation material 25 to keep the temperature of exhaust, therefore make the exhaust gas purification effect of exhaust gas purification catalyst 23 stable.

The right ends of the pillar 22 that engages with lid 21 is uncovered; Therefore can via this opening exhaust gas purification catalyst 23 and thermoinsulation material 25 are encased in the inner space of catalyst structure 20 and certainly this inner space extract exhaust gas purification catalyst 23 and thermoinsulation material 25.Perhaps also can be in advance with pillar 22 before lid 21 engages in exhaust gas purification catalyst 23 and thermoinsulation material 25 are installed as described above;

Cover lip part

22a, 22b butt that thermoinsulation material 25 ground make lid 21 and pillar 22 then, with lid 21 and

lip part

22a, 22b welding joint.

On the outer circumferential face of the pillar 22 of catalyst structure 20, Sealing 24 is installed integratedly.When being arranged on catalyst structure 20 in the gas exhaust manifold 205, Sealing 24 inserts and is installed between the internal surface of pillar 22 and gas exhaust manifold 205.Promptly; The outer circumferential face of pillar 22 (upper-end surface, lower end surface and ear end face) across the internal surface of Sealing 24 and upper end portion, underpart and the rearward end of gas exhaust manifold 205 (promptly; The internal surface of the upper end portion of first housing structure 111, the internal surface of underpart and second housing structure 112) butt; In addition, be seen as from the side circular-arc back upper place portion and the rear lower side portion of the left and right sides middle part of pillar 22 keep guide 13 butts across Sealing 24 and two.Utilize sealing part 24 and above-mentioned maintenance guide 13, the gap between the outer circumferential face of the pillar 22 of closed catalyst structural member 20 and the internal surface of gas exhaust manifold 250.Thus, the exhaust in exhaust entrance 12a imports to gas exhaust manifold 205 does not import in the above-mentioned inner space between pillar 22 and the lid 21 with having leakage, must pass through exhaust gas purification catalyst 23, therefore improves exhaust gas purification efficient.

In addition, between the front surface of the 111d of mounting flange portion of the back surface of the lip part 22a of the pillar 22 that engages with

lid

21,22b and gas exhaust manifold 205, packing ring 26 is installed.Look and form the profile of packing ring 26 with

lip part

22a, 22b with aliging in the front.Bolt hole 22c with the bolt hole 21a of lid 21 and

lip part

22a, 22b is formed with bolt hole 26a with aliging on this packing ring 26 respectively.

Next explain catalyst structure 20 is installed in the process in the gas exhaust manifold 205.Between catalyst structure 20 and gas exhaust manifold 205, be provided with under the state of packing ring 26, via the opening of this packing ring 26 with insert a mouthful 111b, the pillar that Sealing 24 is installed 22 of catalyst structure 20 is inserted in the gas exhaust manifold 205.Then further make catalyst structure 20 rearward, promptly when moving with respect to the rectangular direction of the exhaust air flow in the gas exhaust manifold 205; Soon the back upper place portion of this pillar 22 and rear lower side portion across Sealing 24 with keep guide 13,13 butts, and the ear end face of pillar 22 is across internal surface (front surface) butt of the Sealing 24 and second housing structure 112.At this moment; A mouthful 111b is inserted in lid 21 sealings; Across packing ring 26 and the 111d of mounting flange portion butt, the bolt hole 22c of the bolt hole 21a of lid 21 and lip part 22a, 22b aligns with each bolt hole 26a of packing ring 26 and each bolt hole 111e of the 111d of mounting flange portion naturally for the lip part 22a that engages with the ear end face of lid 21,22b.In each the bolt hole 21a that has alignd, 22c, 26a, 111e, be screwed into bolt 27; Utilize these bolts 27 that lid 21 (with lip part 22a, 22b) and packing ring 26 are fastened on the 111d of mounting flange portion of gas exhaust manifold 205 in the lump; Thereby accomplish the installation of catalyst structure 20 to gas exhaust manifold 205; That is, accomplish the assembling of Exhaust gas purifying device 110.

In gas exhaust manifold 205, installing under the state of catalyst structure 20 like this; In gas exhaust manifold 205; Utilize the gap between the internal surface that keeps guide 13 and Sealing 24 closed catalyst structural members 20 and gas exhaust manifold 205, in addition, in the inner space of catalyst structure 20; Utilize the gap between thermoinsulation material 25 closure body 21 and pillar 22 and the exhaust gas purification catalyst 23; In addition, in the outside of gas exhaust manifold 205, utilize the gap between the 111d of mounting flange portion of packing ring 26 sealing gas exhaust manifolds 205 and the lid 21 of catalyst structure 20 (being lip part 22a, the 22b of pillar 22 in detail).Utilize the tightness of this kind Exhaust gas purifying device 110; Import to as the exhaust in the inner space of the gas exhaust manifold 205 of exhaust passageway from exhaust entrance 112a; There is not the ground of leakage through behind the exhaust gas purification catalyst 23; Flow to silencing apparatus 6 via exhaust outlet 111c, therefore guarantee higher exhaust gas purification efficient.

In the exhaust gas purification ability drop of Exhaust gas purifying device 110 situation under; Unload all bolts 27; Lid 21 is separated from packing ring 26 and the 111d of mounting flange portion (mating face that above-mentioned gas exhaust manifold 205 and catalyst structure 20 engage), thereby can unload catalyst structure 20 from gas exhaust manifold 205 simply.For the catalyst structure that unloads 20; Exhaust gas purification catalyst 23 via the opening of an end about pillar 22 will wear is extracted; Via this opening new exhaust gas purification catalyst 23 is installed in the pillar 22, thereby can forms the catalyst structure 20 that can be installed in the gas exhaust manifold 205 again.Perhaps also can catalyst structure 20 itself be replaced with new catalyst structure.Like this, be installed in the gas exhaust manifold 205, can recover the exhaust gas purification ability of Exhaust gas purifying device 110 through the catalyst structure 20 that will have new exhaust gas purification catalyst 23.

As stated; In the catalyst structure that is installed on gas exhaust manifold 205 20; The lid 21 (comprising

lip part

22a, 22b) that mouthful 111b is inserted in sealing becomes the housing structure as the part of gas exhaust manifold 205, by engaging with first housing structure 111 with the gas exhaust manifold 205 interior parallel above-mentioned mating faces of exhaust air flow, in addition; Through unloading bolt 27, lid 21 is separated from first housing structure 111 by this mating face.When making lid 21 (is

lip part

22a, 22b in detail) and first housing structure 111 by this mating face joint, the maintenance guide 13 that is configured on the internal surface of gas exhaust manifold 205 is located exhaust gas purification catalysts 23.

In addition; In the gas exhaust manifold 205 of the Exhaust gas purifying device 110 of second mode of execution; With the quadric catalysis agent 42 of Exhaust gas purifying device 10 be configured in the gas exhaust manifold 105 the position likewise; On near the position of exhaust outlet 111c, dispose exhaust gas purification catalyst 23, do not dispose the exhaust gas purification catalyst of catalyzer 41 that kind on the other hand at exhaust entrance 112a place.But, also can constitute the structure around the exhaust entrance 112a of gas exhaust manifold 205 with the structure around the exhaust entrance 12a of gas exhaust manifold 105 identically, will be installed in exhaust entrance 112a place with catalyzer 41 same exhaust gas purification catalysts.Thus, in Exhaust gas purifying device 110, also can in gas exhaust manifold 205, dispose, can improve the exhaust gas purification effect as the exhaust gas purification catalyst of a catalyzer with as the exhaust gas purification catalyst 23 of quadric catalysis agent.In addition; Because catalyst structure 20 with respect to gas exhaust manifold 205 loading and unloading freely; Therefore through making a catalyzer freely, can make a catalyzer all can be freely, the raising maintainability with respect to gas exhaust manifold 205 loading and unloading with the quadric catalysis agent with respect to gas exhaust manifold 205 loading and unloading.In addition; Also can be with a catalyzer that on the flow direction of exhaust, is positioned at upstream side as the DOC with oxidation catalysis function (used for diesel engine oxidation catalyst), the exhaust gas purification catalyst that becomes the quadric catalysis agent 23 that will on the flow direction of exhaust, be positioned at the downstream side is made DPF (diesel particulate filter).

Next, use Fig. 7 to Fig. 9 that the structure of the Exhaust gas purifying device 210 of the 3rd mode of execution is described.Represent the identical member of member with first mode of execution and second mode of execution with first mode of execution and the used identical reference character of reference character of second mode of execution.Exhaust gas purifying device 210 mainly is made up of gas exhaust manifold 305 and the exhaust gas purification catalyst (oxidation catalyst) that is configured in the inside of gas exhaust manifold 305 23.That is, gas exhaust manifold 305 has the basic structure as above-mentioned gas exhaust manifold 5, and is also used as the housing of the exhaust gas purification catalyst 23 in the Exhaust gas purifying device 210.In addition, exhaust gas purification catalyst 23 is enclosed in respect in the gas exhaust manifold 205 loading and unloading catalyst structure 120 freely integratedly.

Gas exhaust manifold 305 and gas exhaust manifold 205 be equally through by with the mobile parallel vertical mating face of exhaust, utilize joint first housing structure 111 such as welding and second housing structure 112 and constitute.In addition, also can with second housing structure 112 this member can be separated with bolton first housing structure 111.The shape of first housing structure 111 and second housing structure 112 (shape of particularly seeing from the front) can be identical with the housing structure 111,112 of Exhaust gas purifying device 110, perhaps can form different shape according to the design of motor 100.But, as first housing structure 111 of Exhaust gas purifying device 110 has be not located at first housing structure 111 with insertion mouth 111b, the 111d of mounting flange portion that offers abreast that flow exhaust.

Through next door at the insertion mouth 6a of silencing apparatus 6; By with this insert mouthful 6a parallel promptly with mobile rectangular (fore-and-aft direction of motor 100) vertical mating face of exhaust; The upper reaches housing 81 in left side (being seen as the right side from the front) is engaged with the downstream housing 82 of right side (being seen as the left side from the front), constitute the gas exhaust manifold 305 of Exhaust gas purifying device 210.That is, this each upper reaches housing 81 and downstream housing 82 are to constitute through engaging as first housing structure 111 of the front portion of gas exhaust manifold 305 with as second housing structure 112 at the rear portion of gas exhaust manifold 305.Upper reaches housing 81 is configured in the upstream side of the flow direction of the exhaust that is produced by gas exhaust manifold 305, and is fixed on the cylinder cap 3.Downstream housing 82 is configured in the downstream side of the flow direction of the exhaust that is produced by gas exhaust manifold 305, and is fixed on the silencing apparatus 6.

In addition; In this mode of execution; Have under the situation of right ends at each member (each several part), a left side (being seen as the right side from the front) end is configured in the upstream side of the flow direction of the exhaust in the gas exhaust manifold 305, and right (being seen as a left side from the front) end is configured in the downstream side of the flow direction of this exhaust.Below, " upstream side " end refers to a left side (being seen as the right side from the front) end of this member (or part), " downstream side " end refers to the right side (being seen as a left side from the front) end of this member (or part).

The downstream side that faces above-mentioned mating face of housing 81 is formed with the housing flange 71 of (or being fixed with) vertical shape at the upper reaches, and the upper reaches side that faces this mating face of housing 82 is formed with the housing flange 72 of (or being fixed with) vertical shape in downstream.A plurality of bolt hole 71a see that from the side sky is opened in housing flange 71 with opening predetermined distance, and a plurality of bolt hole 72a ground that aligns with each bolt hole 71a sees that from the side sky is opened in housing flange 72 with opening predetermined distance.

In upper reaches housing 81, dispose maintenance guide 14 as the tab of the exhaust gas purification catalyst of stating after being used to keep 23.The upstream side end face butt that keeps guide 14 and exhaust gas purification catalyst 23.In this mode of execution; Can know according to Fig. 7 and Fig. 8, be provided with in upper reaches guide 81 that rearward outstanding two front sides up and down of the internal surface of front portion (i.e. first housing structure 111) of the housing 81 from the upper reaches keep guide 14 and forwards outstanding two rear sides up and down of the internal surface at the rear portion (i.e. second housing structure 111) of housing 81 keep guides 14 from the upper reaches 4 the maintenance guides 14 that amount to.Keeping guide 14 to form with each housing structure 111,112, also can be to distinguish independently member with housing structure 111,112, can also be fixed at each housing structure 111,112.

Catalyst structure 120 constitutes through catalyzer flange 126, thermoinsulation material 25 and exhaust gas purification catalyst 23 are made up integratedly.

Catalyzer flange 126 is the tabular flanges of vertical of outer periphery portion that are fixed at the downstream side end face of exhaust gas purification catalyst 23; When being installed in catalyst structure 120 in the gas exhaust manifold 305, catalyzer flange 126 becomes and is installed in housing flange 71, the packing ring between 72.Can know that by Fig. 9 in this mode of execution, the gabarit shape of catalyzer flange 126 is seen as essentially rectangular from the side, but the present invention is not limited thereto, also can forms the shape of that kind consistent with

housing flange

71,72.

On catalyzer flange 126, offer bolt hole 126a with each bolt hole 71a of housing flange 71 and each bolt hole 72a of housing flange 72 respectively with aliging.In this mode of execution, as shown in Figure 9, be formed with bolt hole 126a in each bight in four bights of the catalyzer flange 126 that is seen as essentially rectangular from the side.

The opening that is fenced up by housing flange 71 of the downstream side of upper reaches housing 81 is the insertion mouth 81a that supply exhaust gas purification catalyst 23 to insert, and can be formed with opening 126b with inserting on mouthful 81a positions aligning at catalyzer flange 126.

The outer circumferential face of exhaust gas purification catalyst 23 utilizes the thermoinsulation material 25 of glass wool etc. to cover, according to the inner space of upper reaches housing 81, and this thermoinsulation material 25 of moulding.When being arranged on exhaust gas purification catalyst 23 in the gas exhaust manifold 305, be filled with thermoinsulation material 25 in the gap between internal surface outer surface and gas exhaust manifold 305 (being upper reaches housing 81) of exhaust gas purification catalyst 23.Thus; Exhaust in exhaust entrance 112a imports to upper reaches housing 81 does not import in the exhaust gas purification catalyst 23 with having leakage; Utilize the heat insulating function of thermoinsulation material 25 in addition, the delivery temperature in the exhaust gas purification catalyst 23 is remained high temperature, promote the exhaust gas purification effect.

Exhaust gas purification catalyst 23 has exhaust gas purification catalyst 23 identical construction, function and the shape with Exhaust gas purifying device 110.The end of downstream side of this exhaust gas purification catalyst 23 is configured in the opening 126b of catalyzer flange 126, and is adhered to catalyzer flange 126 by the thermoinsulation material on the outer circumferential face that is installed in this exhaust gas purification catalyst 23 25.But; Also can become the opening 126b of catalyzer flange 126, thereby make the downstream side end face of this exhaust gas purification catalyst 23 directly be adhered to the upstream side end face of catalyzer flange 126 than the insertion mouth 81a of upper reaches housing 81 and the downstream side end face microrelief of exhaust gas purification catalyst 23.

Next explain catalyst structure 120 is installed in the process in the gas exhaust manifold 305.Under the state that gas exhaust manifold 305 is separated into upper reaches housing 81 and downstream housing 82, be inserted in the upper reaches housing 81 with thermoinsulation material 25 via inserting the exhaust gas purification catalyst 23 of mouthful 81a with catalyst structure 120.Then when making catalyst structure 120 further (be seen as the right side) relatively to the left and move with respect to upper reaches housing 81 from the front along the flow direction of the exhaust in the gas exhaust manifold 305; Soon be inserted in the upstream side end face and maintenance guide 14 butts of the exhaust gas purification catalyst 23 in the upper reaches housing 81; At this moment, the upstream side end face of catalyzer flange 126 naturally with housing flange 71 butts.In addition, form the state that is filled with thermoinsulation material 25 in the space between the inner peripheral surface of the outer circumferential face of exhaust gas purification catalyst 23 and upper reaches housing 81 this moment.

Under this state, make the housing flange 72 of downstream housing 82 and the downstream side end face butt of catalyzer flange 126, utilize

housing flange

71,72 clamping catalyzer flanges 126.At this moment, each

bolt hole

71a, 126a, 72a are in alignment with each other, bolt 27 is screwed in these bolts hole, thus fastening in the lump

stationary housing flange

71,72 and catalyzer flange 126.Thus, accomplish the assembling of gas exhaust manifold 305, and accomplish to gas exhaust manifold 305 exhaust gas purification catalyst 23 of packing into.

The gas exhaust manifold 305 of having accomplished assembling like this has exhaust entrance 112a, exhaust outlet 111c and

bolt hole

62,63 equally with gas exhaust manifold 205.When the gas exhaust manifold 305 with Exhaust gas purifying device 210 is installed in the motor 100; With gas exhaust manifold 105,205 likewise; The end of downstream side of gas exhaust manifold 305 (being downstream housing 82 in detail) is inserted in the silencing apparatus 6, thereby exhaust outlet 111c is configured in the silencing apparatus 6.On the other hand; Dispose exhaust entrance 112a with relief opening 34 with aliging; And the

bolt hole

62,63 of gas exhaust manifold 305 (being upper reaches housing 81 in detail) is alignd with the bolt hole 61 of cylinder cap 3; Bolt 65 is screwed into respectively in the

bolt hole

61,62,63, thereby the upstream-side-end of gas exhaust manifold 305 is fixed on the cylinder cap 3.

In the exhaust gas purification ability drop of Exhaust gas purifying device 210 situation under, gas exhaust manifold 305 is separated into upper reaches housing 81 and downstream housing 82, and the catalyst structure 120 that housing 81 will have an exhaust gas purification catalyst 23 that has worn from the upper reaches is extracted.This process is described below.Unload bolt 65 from each

bolt hole

61,62,63, gas exhaust manifold 305 (being upper reaches housing 81) is separated from cylinder cap 3.In addition, be fixed at downstream housing 82 under the state of silencing apparatus 6, unload bolt 27 from

bolt hole

72a, 126a, 71a, housing 82 separates from downstream with catalyst structure 120 can to make upper reaches housing 81.Like this, make than cylinder cap 3 and downstream housing 82 freely upper reaches housing 81 (be seen as the right side) to the left along the flow direction of exhaust and move from the front, thereby housing 82 is pulled away from upper reaches housing 81 from downstream, and then housing 81 unloads catalyst structure 120 from the upper reaches.

For the catalyst structure 120 that has unloaded; The residual exhaust gas purification catalyst 23 self-catalysis agent flanges 126 that catalyzer flange 126 arranged and will wear unload; New exhaust gas purification catalyst 23 is installed on the catalyzer flange 126, thereby recovers this catalyst structure 120.Perhaps also can not change exhaust gas purification catalyst 23 ground; Put upside down the upper reaches side and the downstream side of configuration exhaust gas purification catalyst 23; Before for the end of the upper reaches side catalyzer flange 126 is installed and is sent back in the gas exhaust manifold 305, thereby can prolong service time of exhaust gas purification catalyst 23.Perhaps also can catalyst structure 120 itself be replaced with new catalyst structure 120.Like this; Be assembled in the upper reaches housing 81 through catalyst structure 120 after will repairing or new catalyst structure 120; Utilize bolt 27 to be fastened on the housing flange 72 of downstream housing 82 by the housing flange 71 of catalyzer flange 126 with upper reaches housing 81; And then utilize bolt 65 with the upper reaches housing 81 fastening cylinder caps 3 that are fixed in, thereby the Exhaust gas purifying device 210 that will recover the exhaust gas purification ability is installed in the motor 100.

In addition; Also can constitute the structure around the exhaust entrance 112a of gas exhaust manifold 305 with the structure around the exhaust entrance 12a of gas exhaust manifold 105 in the Exhaust gas purifying device 10 identically, thus can be with being installed in exhaust entrance 112a place with catalyzer 41 identical exhaust gas purification catalysts.Thus, in Exhaust gas purifying device 210, also can in gas exhaust manifold 305, dispose, can improve the exhaust gas purification effect as the exhaust gas purification catalyst of a catalyzer with as the exhaust gas purification catalyst 23 of quadric catalysis agent.In addition; Because catalyst structure 120 with respect to gas exhaust manifold 305 loading and unloading freely; Therefore through making a catalyzer freely, can make catalyzer and quadric catalysis agent all freely, the raising maintainability with respect to gas exhaust manifold 305 loading and unloading with respect to gas exhaust manifold 305 loading and unloading.In addition; Also can be with a catalyzer that on the flow direction of exhaust, is positioned at upstream side as the DOC with oxidation catalysis function (used for diesel engine oxidation catalyst); The exhaust gas purification catalyst that constitutes the quadric catalysis agent 23 that will on the flow direction of exhaust, be positioned at the downstream side forms DPF (diesel particulate filter, diesel particulate filter).

As stated; Motor 100 of the present invention comprises cylinder cap 3, silencing apparatus 6 and is folded in the gas exhaust manifold 5 (105,205 or 305) between this cylinder cap 3 and this silencing apparatus 6, this gas exhaust manifold 5 (105,205 or 305) possess be formed on this cylinder cap 3 in the exhaust entrance 12a that is connected of

relief openings

34 or 112a and exhaust outlet 11c or the 111c that is connected with this silencing apparatus 6.This kind motor 100 has Exhaust gas purifying device 10,110 or 210; This Exhaust gas purifying device 10,110 or 210 by this gas exhaust manifold 105,205 or 305 and exhaust

gas purification catalyst

41,42 or 23 constitute, this exhaust

gas purification catalyst

41,42 or 23 be configured in this gas exhaust manifold 105,205 or 305 this

exhaust entrance

12a or 112a, and this

exhaust outlet

11c or 111c between the inner space as exhaust passageway in.

Like this; Through built-in exhaust

gas purification catalyst

41,42 or 23 in existing gas exhaust manifold 105,205 or 305; Constitute exhaust gas purification with device 10,110 or 210, therefore compare, can reduce the parts number of packages with the way that new Exhaust gas purifying device is set in addition.In addition; Configuration space as exhaust

gas purification catalyst

41,42 or 23; Utilize the inner space of existing gas exhaust manifold 105,205 or 305, so the boundary dimension of gas exhaust manifold 105,205 or 305 can form and the measure-alike size that does not dispose under the situation of exhaust gas purification catalyst.On the other hand, silencing apparatus 6 also is built-in with exhaust gas purification catalyst, therefore need not maximize.Thereby, can motor 100 whole boundary dimension, shapes be remained size, shape under the state that exhaust gas purification catalyst is not set.

In addition, about the maintainability of exhaust gas purification catalyst 41,42 or 23, also need not dismounting, silencing apparatus 6 separately for catalyst changeout more.Integrated indissociably and constitute under the situation of Exhaust gas purifying device at the exhaust gas purification catalyst of the inside that makes gas exhaust manifold and gas exhaust manifold; Need be with the Exhaust gas purifying device of Exhaust gas purifying device integral replacing Cheng Xin; But owing to itself constitute the housings of Exhaust gas purifying devices 10,110 or 210 than little a lot of gas exhaust manifold 105,205 or 305 such as the vibration of silencing apparatus etc. as engine components; Therefore only utilize with respect to cylinder cap 3 and the gas exhaust manifold 105,205 of silencing apparatus 6 or 305 dismounting operation, just can accomplish the replacing operation of Exhaust gas purifying device 10,110 or 210.In addition; See after and state; When adopting can be with respect to the structure of gas exhaust manifold 105,205 or 305 dismounting exhaust gas purification catalysts 41,42,23 time; Can keep with gas exhaust manifold 105,205 or 305 be folded between cylinder cap 3 and the silencing apparatus 6 state unchangeably, only change exhaust gas purification catalyst 41,42,23.Like this, the Exhaust gas purifying device 10,110,210 of motor 100 of the present invention can improve the maintainability of exhaust gas purification catalyst 41,42,23.

In addition; The exhaust gas purification effect owing to compare with the silencing apparatus 6 that was built-in with exhaust gas purification catalyst as stated in the past, is positioned at the gas exhaust manifold 105,205 of upstream side or 305 inner space configuration exhaust

gas purification catalyst

41,42,23 too on the flow direction of exhaust; Therefore arrive the moment of exhaust

gas purification catalyst

41,42,23 in exhaust; Heat of exhaust remains quite high temperature, utilizes the oxidation and the combustion of the exhaust gas heat promotion exhaust

gas purification catalyst

41,42,23 of this high temperature, improves the exhaust gas purification effect; That is the minimizing effect of exhaust emission.

In the motor with above-mentioned Exhaust gas purifying device 10 100; Dispose another exhaust gas purification catalyst in the above-mentioned inner space of the above-mentioned gas exhaust manifold 105 of the above-mentioned exhaust passageway of conduct in this Exhaust gas purifying device 10; The exhaust gas purification catalyst that is positioned at upstream side on the flow direction with exhaust in above-mentioned exhaust gas purification catalyst and this another catalyst for clarifying, in this exhaust passageway is as a catalyzer 41, and the exhaust gas purification catalyst that will be positioned at the downstream side is as quadric catalysis agent 42.

Like this; In this Exhaust gas purifying device 10; Because this another exhaust gas purification catalyst also is configured in the inner space of gas exhaust manifold 105; Therefore can size, the shape of gas exhaust manifold 105 be remained existing size, shape invariance ground, keep the compactedness of motor 100, also can avoid making complex-shapedization of motor 100 integral body.And in the exhaust passageway in this gas exhaust manifold 105, exhaust is divided into two stages purifications by a catalyzer 41 with quadric catalysis agent 42, therefore can improve purifying property.

In the motor with above-mentioned Exhaust gas purifying device 10 100, make an above-mentioned catalyzer 41 freely with respect to above-mentioned gas exhaust manifold 105 loading and unloading.

Like this, why making a catalyzer 41 with respect to gas exhaust manifold 105 loading and unloading freely, is shorter than quadric catalysis agent 42 because be exposed to the life-span of a catalyzer 41 in the higher exhaust of temperature, and it changes the replacing frequency that frequency is higher than quadric catalysis agent 42.That is, utilize a catalyzer 41 to change catalyzer 41 one time, carry out numerous and diverse operation when therefore noting be used in catalyzer 41 of each replacing with respect to cylinder cap 3, silencing apparatus 6 dismounting gas exhaust manifolds 105 with respect to the loading and unloading of gas exhaust manifold 105.In addition, if can not load and unload catalyzer one time with respect to gas exhaust manifold, then when needs are changed a catalyzer, need to change whole Exhaust gas purifying device, the life-span grows than catalyzer and also effective quadric catalysis agent also is replaced.In the present invention, through making a catalyzer 41 freely, also can avoid the replacing in vain of the quadric catalysis agent 42 of above-mentioned that kind with respect to gas exhaust manifold 105 loading and unloading.

In the motor with above-mentioned Exhaust gas purifying device 10 100; Offer an insertion mouthful 11b in the side of above-mentioned gas exhaust manifold 105; First end through with above-mentioned exhaust gas purification catalyst 41 is inserted in this gas exhaust manifold 105 via this insertion mouthful 11b; This exhaust gas purification catalyst 41 is configured in this gas exhaust manifold 105; Second end opposition side, this exhaust gas purification catalyst 41 at this first end is fixed with lid 43, is installed on the outer surface of this gas exhaust manifold 105 this lid 43 this insertion of sealing mouthful 11b.

In addition; In the motor with above-mentioned Exhaust gas purifying device 110 100; Also offer and insert a mouthful 111b in the side of above-mentioned gas exhaust manifold 205; First end through with above-mentioned exhaust gas purification catalyst 23 is inserted in this gas exhaust manifold 205 via this insertion mouthful 111b; This exhaust gas purification catalyst 23 is configured in this gas exhaust manifold 205, is fixed with lid 21, be installed on the outer surface of this gas exhaust manifold 205 this this insertions mouth of lid 21 sealings 111b at second end opposition side, this exhaust gas purification catalyst 23 of this first end.

Like this; In Exhaust

gas purifying device

10 or 110; Exhaust

gas purification catalyst

41 or 23 constitutes as cartridge; Only through this first end being inserted in

gas exhaust manifold

105 or 205 via this insertion mouthful 11b or 111b; Then this

lid

43 or 21 is installed on the outer surface of

gas exhaust manifold

105 or 205, just can accomplishes simply that exhaust

gas purification catalyst

41 or 23 is assemblied in

gas exhaust manifold

105 or 205, in addition; Only the lid 43 through making the outside that is configured in

gas exhaust manifold

105 or 205 or 21 moves away from inserting mouthful 11b or 111b ground, just can simply exhaust

gas purification catalyst

41 or 23 pulled out and unload from

gas exhaust manifold

105 or 205 from this insertion mouth 11b or 111b.That is, can change exhaust

gas purification catalyst

41 or 23, therefore can improve the maintainability of exhaust

gas purification catalyst

41 or 23 with respect to cylinder cap 3 and silencing apparatus 6 loading and unloading

gas exhaust manifolds

105 or 205 ground.

In the motor with above-mentioned Exhaust gas purifying device 10 100; Above-mentioned first end of above-mentioned exhaust gas purification catalyst 41 forms the shape that is complementary with above-mentioned relief opening 34; Through the above-mentioned exhaust entrance 12a of this first end via above-mentioned gas exhaust manifold 105 is inserted in this relief opening 34, this exhaust gas purification catalyst 41 is supported on this cylinder cap 3.

Like this; Through gas exhaust manifold 105 as the inner space of exhaust passageway in configuration exhaust gas purification catalyst 41 on the highest position of delivery temperature; Can farthest bring into play the exhaust gas purification ability (oxidability) of exhaust gas purification catalyst 41, promote the minimizing effect of exhaust emission 41.And; Because will be fixed at the lid 43 of second end of exhaust gas purification catalyst 41 is installed on the outer surface of gas exhaust manifold 105; On the other hand, being embedded in state support in the relief opening 34 in cylinder cap 3, so the two ends of facing of exhaust gas purification catalyst 41 are supported with second end of exhaust gas purification catalyst 41; Can exhaust gas purification catalyst 41 be rocked, or the leakage of exhaust takes place.

In the motor with above-mentioned Exhaust gas purifying device 10 100, above-mentioned lid 43 has lip part 43a at peripheral part, and this lip part 43a and above-mentioned gas exhaust manifold 105 all are anchored on above-mentioned cylinder cap 3.

Thus, can load and unload gas exhaust manifold 105 and exhaust gas purification catalyst 41 integratedly, improve maintainability with respect to cylinder cap 3.Promptly; The lip part 43a of the lid that is fixed at exhaust gas purification catalyst 41 43 is fixed on the double terminal operation that carries out gas exhaust manifold 105 to cylinder cap 3 of an operation on the cylinder cap 3; On the other hand; Utilize to remove the fastening operation of this lip part 43a, also can remove gas exhaust manifold 105 fastening to cylinder cap 3 to cylinder cap 3.Like this, can reduce and be used to make Exhaust gas purifying device 10 operation quantity that is connected with cylinder cap 3 and the operation quantity that is used for unloading Exhaust gas purifying device 10 from cylinder cap 3.

In the motor with above-mentioned Exhaust gas purifying device 10 100; Above-mentioned gas exhaust manifold 105 has by two

housing structures

11,12 that are engaged with each other with the parallel face of flow direction as the exhaust in the above-mentioned exhaust passageway of the inner space of this gas exhaust manifold 105 at least; On the internal surface of this gas exhaust manifold 105, dispose and keep guide 51; This maintenance guide 51 is used for when this housing structure of at least two 11,12 is engaged with each other, locating this exhaust gas purification catalyst 42.

In addition; In the motor with above-mentioned Exhaust gas purifying device 110 100; Above-mentioned gas exhaust manifold 205 also have by with at least two

housing structures

111,21 that are engaged with each other as the parallel face of exhaust air flow in the above-mentioned exhaust passageway of the inner space of this gas exhaust manifold 205; On the internal surface of this gas exhaust manifold 105, dispose maintenance guide 13, this maintenance guide 13 is used for when this housing structure of at least two 111,21 is engaged with each other, locating this exhaust gas purification catalyst 23.

Like this; In this Exhaust

gas purifying device

10 or 110; Can be when carrying out the joint operation of these at least two

housing structures

11,12 or 111,21; Utilize to keep

guide

51 or 13, exhaust

gas purification catalyst

42 or 23 is located the assigned position that remains on

gas exhaust manifold

105 or 205 inside, make exhaust

gas purification catalyst

42 or 23 assembling facilitations to gas exhaust manifold 105 or 205.In addition; When this housing structure of at least two 11,12 or 111,21 can be separated; Utilize the separation of housing structure; Can easily unload by the exhaust

gas purification catalyst

42 or 23 that keeps guide 51 or 13 to keep, can utilize above-mentioned technology that new exhaust

gas purification catalyst

42 or 23 is assembled in

gas exhaust manifold

105 or 205 simply.

In the motor with above-mentioned Exhaust gas purifying device 210 100; Periphery at above-mentioned exhaust gas purification catalyst 23 is fixed with catalyzer flange 126; The rectangular parting plane of flow direction of the exhaust in the above-mentioned exhaust passageway that above-mentioned gas exhaust manifold 305 utilizes and it is inner; Can be separated into two

housing structures

81,82; The end periphery in the face of this parting plane at this

housing structure

81,82 respectively is formed with

housing flange

71,72, through at 71,72 these catalyzer flanges 126 of clamping of two these housing flanges, this exhaust gas purification catalyst 23 is fixed in this gas exhaust manifold 305.

Like this, in Exhaust gas purifying device 210,, can decompose gas exhaust manifold 305, can easily load and unload exhaust gas purification catalyst 23, improve maintainability through the

housing flange

71,72 of two

housing structures

81,82 is separated from one another.In addition, the catalyzer flange 126 through 71,72 settings of housing flange and exhaust gas purification catalyst 23 at two

housing structures

81,82 become one can prevent the clearance leakage of exhaust from 71,72 of housing flanges.

In the motor 100 with above-mentioned Exhaust gas purifying device 10,110,210, above-mentioned exhaust

gas purification catalyst

42 or 23 has thermoinsulation material 25 in periphery.

Like this; In this Exhaust gas purifying device 10,110,210; Utilize thermoinsulation material 25 landfill gas exhaust manifolds 105,205 or 305 and exhaust

gas purification catalyst

42 or 23 between the gap; Suppress the decrease of temperature of exhaust

gas purification catalyst

42 or 23, thereby can farthest bring into play the exhaust gas purification ability of exhaust

gas purification catalyst

42 or 23, improve the minimizing effect of exhaust emission.

In addition, thermoinsulation material 25 for example also can be located at a catalyzer 41 of Exhaust gas purifying device 10 according to the difference of setting except above-mentioned configuration mode.In addition, also can exhaust

gas purification catalyst

23 or 43 be built in the gas exhaust manifold not outer dress thermoinsulation material ground.In addition, the whole surface of periphery that can make exhaust gas purification catalyst is across the internal surface butt of thermoinsulation material and gas exhaust manifold, and the part surface of periphery that also can only make exhaust gas purification catalyst is across the internal surface butt of thermoinsulation material and gas exhaust manifold.

Industrial applicibility

The present invention can be utilized in the technology of Exhaust gas purifying device of motor, particularly can be utilized in the technology of configuration and replacing of the catalyzer that exhaust gas purification uses.As motor with Exhaust gas purifying device of the present invention, can be DENG etc., in addition except providing, also can be provided as the engine operated machine that is connected with working machine and constitutes with going of motor monomer.

Claims

1. motor; This motor possess cylinder cap, silencing apparatus and be folded in this cylinder cap and this silencing apparatus between gas exhaust manifold; This gas exhaust manifold comprises exhaust entrance that the relief opening interior with being formed on this cylinder cap is connected and the exhaust outlet that is connected with this silencing apparatus, it is characterized in that

This motor has Exhaust gas purifying device; This Exhaust gas purifying device is made up of this gas exhaust manifold and exhaust gas purification catalyst, and this exhaust gas purification catalyst is configured in this exhaust entrance and the inner space as exhaust passageway between this exhaust outlet of this gas exhaust manifold.

2. motor according to claim 1 is characterized in that,

Dispose another exhaust gas purification catalyst in the said inner space of the said gas exhaust manifold of the said exhaust passageway of conduct in said Exhaust gas purifying device; With the exhaust gas purification catalyst of the upstream side of the flow direction of the exhaust that is arranged in this exhaust passageway in said exhaust gas purification catalyst and this another exhaust gas purification catalyst as a catalyzer, with the exhaust gas purification catalyst in downstream side as the quadric catalysis agent.

3. motor according to claim 2 is characterized in that,

Make a said catalyzer freely with respect to said gas exhaust manifold loading and unloading.

4. motor according to claim 1 is characterized in that,

Offer the insertion mouth in the side of said gas exhaust manifold; First end through with said exhaust gas purification catalyst is inserted in this gas exhaust manifold via this insertion mouth; This exhaust gas purification catalyst is configured in this gas exhaust manifold; Second end in the side opposite with this first end of this exhaust gas purification catalyst is fixed with lid, is installed on the outer surface of this gas exhaust manifold this this insertions mouth of lid sealing.

5. motor according to claim 4 is characterized in that,

Said first end of said exhaust gas purification catalyst is the shape that is complementary with said relief opening, through the said exhaust entrance of this first end via said gas exhaust manifold is inserted in this relief opening, this exhaust gas purification catalyst is supported on this cylinder cap.

6. according to claim 4 or 5 described motors, it is characterized in that,

Said lid has lip part at peripheral part, and this lip part and said gas exhaust manifold all are anchored on said cylinder cap.

7. motor according to claim 1 is characterized in that,

Said gas exhaust manifold has at least two housing structures; These at least two housing structures by with as the parallel face of flow direction of the exhaust in the said exhaust passageway of the inner space of this gas exhaust manifold and be engaged with each other; On the internal surface of this gas exhaust manifold, dispose the maintenance guide; This maintenance guide is used for when these at least two housing structures are engaged with each other, locating this exhaust gas purification catalyst.

8. motor according to claim 1 is characterized in that,

Periphery at said exhaust gas purification catalyst is fixed with the catalyzer flange; The rectangular parting plane of flow direction of the exhaust in the said exhaust passageway of the inside of said gas exhaust manifold utilization and this gas exhaust manifold; Can be separated into two housing structures; The end periphery of facing with this parting plane at this housing structure respectively is formed with the housing flange, through this catalyzer flange of clamping between two these housing flanges, this exhaust gas purification catalyst is fixed in this gas exhaust manifold.

9. according to each described motor in the claim 1 to 8, it is characterized in that,

Said exhaust gas purification catalyst has thermoinsulation material in periphery.