CN106468204A - The waste gas purification apparatus of internal combustion engine - Google Patents
The waste gas purification apparatus of internal combustion engine Download PDFInfo
- Publication number
- CN106468204A CN106468204A CN201610647616.7A CN201610647616A CN106468204A CN 106468204 A CN106468204 A CN 106468204A CN 201610647616 A CN201610647616 A CN 201610647616A CN 106468204 A CN106468204 A CN 106468204A
- Authority
- CN
- China
- Prior art keywords
- waste gas
- ingress pipe
- side end
- honeycomb substrate
- purification apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
The present invention provides a kind of waste gas purification apparatus of internal combustion engine, and it is compared with the past can to make rapidly exhaust gas purifying catalyst heat up, and enables to the waste gas stream of inflow exhaust gas cleaning catalyst uniformly, can reduce the pressure loss and heat deterioration, and inexpensively.Waste gas purification apparatus possesses：Waste gas ingress pipe, it is connected with the downstream of the flue gas leading extending from electromotor；The honeycomb substrate of column, it is connected with the downstream of waste gas ingress pipe, is divided by the next door of Porous and is formed with multiple cells, the plurality of cell extends to downstream-side end surface from the upstream-side end surface of this honeycomb substrate；And exhaust gas purifying catalyst, it is carried on honeycomb substrate, waste gas ingress pipe is configured to more downstream side more enlarged diameter, downstream side end face, i.e. waste gas approaching face tilt to the direction relative with this upstream-side end surface with respect to the central axis of the upstream-side end surface of waste gas ingress pipe, the upstream-side end surface of honeycomb substrate is formed along the waste gas approaching face of waste gas ingress pipe.
Description
Technical field
The present invention relates to the waste gas purification apparatus of internal combustion engine.Specifically, be related to one kind be arranged in engine room in
The waste gas purification apparatus of the vicinity of combustion engine.
Background technology
In the past, the waste gas purification apparatus being known in the vicinity being arranged at internal combustion engine in engine room is (referring for example to patent literary composition
Offer 1).In this waste gas purification apparatus, the exhaust gas purifying catalyst being carried on honeycomb substrate configures in the vicinity of internal combustion engine.By
This, after the start of the internal combustion engine, waste gas at higher temperature flows into, and thus promotes exhaust gas purifying catalyst to heat up, it can be made to swash in advance
Live.
In addition, the honeycomb substrate carrying exhaust gas purifying catalyst is usually cylindric.Additionally, setting in the vicinity of internal combustion engine
In the case of putting waste gas purification apparatus, due to the restriction of arrangement, carry the columned honeycomb substrate of exhaust gas purifying catalyst
Configured towards the state of roughly vertical direction with its center axis.From internal combustion engine extend waste gas (importing) pipe along approximate horizontal side
To extending the bending of backward lower section, thus being connected with the upper end of waste gas purification apparatus.
Prior art literature
Patent documentation
Patent documentation 1：Japanese Unexamined Patent Publication 2006-17018 publication
Content of the invention
Invent problem to be solved
Therefore, even if will to the previously activated further of exhaust gas purifying catalyst in order to tackle aerofluxuss regulations new from now on
Ask, and exhaust gas purifying catalyst to be made is closer to internal combustion engine, but in the structure of conventional waste gas purification apparatus, realistic situation is
This configuration has reached capacity.That is, due to the bending of waste gas (importing) pipe it is impossible to configure columned honeycomb substrate than waste gas
The bending section of (importing) pipe leans on the position of upstream side.Accordingly, as being used for making exhaust gas purifying catalyst previously activated further
Means, enumerate for example following means.
First, enumerate and so that exhaust gas purifying catalyst is reduced further closer to the waste gas outlet (exhaust valve) of internal combustion engine
The means of thermal capacitance.Specifically, following means have been enumerated：Make the exhaust manifold means integrated with waste gas purification apparatus, will give up
The fastening of gas (importing) pipe and waste gas purification apparatus is changed to band fastening so that fastening part densification from conventional bolt fastening
Means.
But, by these means, distance that can be close is little, the activated in advance effect of the exhaust gas purifying catalyst obtaining
Little.Additionally, not only must be to all circumferential component design for change, and the assembling operation to exhaust system component or upkeep operation
There is big impact, lead to cost to increase.
Second, enumerate and improved the thermal insulation of waste gas (importing) pipe, the heat insulating ability connecting internal combustion engine and waste gas purification apparatus
Means.Specifically, following means have been enumerated：Outer part and inner part are joined together and waste gas (importing) is managed
Means for double-sleeve structure and the means that waste gas (importing) pipe is implemented with heat-insulated coating.
But pass through these means, in order to obtain sufficiently heat-insulated, heat insulation effect it is necessary to improve component parts size,
Assembly precision etc., actually cannot sufficiently heat-insulated, heat insulation effect, in addition cost be significantly increased.
3rd, enumerate the means of the activated in advance performance improving exhaust gas purifying catalyst itself.Specifically, enumerate
Following means：Make the next door carrying the honeycomb substrate of exhaust gas purifying catalyst thinner and reduce the means of thermal capacitance and pass through
Increase the platinum isoreactivity amount of metal constituting exhaust gas purifying catalyst improving the means of low temperature active performance.
But, by these means, when making next door thinner, the durability of honeycomb substrate can be led to decline, live when increasing
During property amount of metal, cost can be led to be significantly increased.
4th, enumerate the means of the temperature improving the waste gas discharged from internal combustion engine.Specifically, following handss have been enumerated
Section：Execute more work by improving the rotating speed of internal combustion engine, so that EGT is further up.
But, by this means, not only fuel efficiency deterioration, and other component parts must be improved due to heat affecting
Thermostability.
Therefore, so far also do not find can either by external world impact suppression again can be compared with the past in Min.
The cheap waste gas purification apparatus of activated in advance exhaust gas purifying catalyst is it is desirable to develop such waste gas purification apparatus.And, open
When sending out, certainly also require that the waste gas stream of inflow exhaust gas cleaning catalyst uniformly, the pressure loss and heat deterioration reduce.
The present invention completes in view of the foregoing, its object is to provide a kind of waste gas purification of cheap internal combustion engine
Device, its compared with the past can activated in advance exhaust gas purifying catalyst, and enable to the useless of inflow exhaust gas cleaning catalyst
Air-flow uniformly, can reduce the pressure loss and heat deterioration.
Means for solving the problems
In order to achieve the above object, (waste gas for example described later is net for a kind of waste gas purification apparatus of internal combustion engine of present invention offer
Gasifying device 1), the waste gas purification apparatus of this internal combustion engine is arranged on internal combustion engine in engine room (engine room E for example described later)
The vicinity of (electromotor for example described later), purifies the waste gas of described internal combustion engine, and described waste gas purification apparatus possesses：Waste gas ingress pipe
(waste gas ingress pipe 2 for example described later), it is connected with the downstream of the flue gas leading extending from described internal combustion engine；The cellular set of column
Body (honeycomb substrate 11 for example described later), it is connected with the downstream of described waste gas ingress pipe, by the next door division of Porous
It is formed with multiple cells, the plurality of cell extends to downstream-side end surface from the upstream-side end surface of this honeycomb substrate and becomes
The stream of waste gas；And exhaust gas purifying catalyst, it is carried on described honeycomb substrate, described waste gas ingress pipe be configured to
The enlarged diameter towards downstream, and the waste gas approaching face being formed by the downstream-side end surface of this waste gas ingress pipe is (for example described later
Waste gas approaching face 20) with respect to this waste gas ingress pipe upstream-side end surface (upstream-side end surface 21 for example described later) central axis
(central axis X 1 for example described later) tilts to the direction relative with this upstream-side end surface, the upstream-side end surface of described honeycomb substrate
(upstream-side end surface 110 for example described later) is formed along the waste gas approaching face of described waste gas ingress pipe.
In the present invention, it is arranged in engine room in the waste gas purification apparatus of vicinity of internal combustion engine, so that waste gas is imported
Pipe is with the enlarged diameter towards downstream, and waste gas ingress pipe is arranged to be imported by the waste gas that side end face downstream is formed
Face tilts to the direction relative with this upstream-side end surface with respect to the central axis of the upstream-side end surface of this waste gas ingress pipe.And
And, by carry exhaust gas purifying catalyst honeycomb substrate be arranged to so that its upstream-side end surface along waste gas ingress pipe waste gas
Approaching face.
Thus, carry exhaust gas purifying catalyst the upstream-side end surface of honeycomb substrate, i.e. waste gas flow into entrance side end
The central axis that face is configured to the upstream-side end surface with respect to waste gas ingress pipe tilts, and relative with waste gas ingress pipe side.Cause
Honeycomb substrate can be configured the position of the bending section to conventional waste gas ingress pipe by this, therefore compared with the past can make to give up
Gas cleaning catalyst is close to internal combustion engine side, thus the waste gas that can make high temperature compared with the past flows into exhaust gas purifying catalyst.Cause
This, according to the present invention, by improving such cheap means it becomes possible to provide and conventional phase to the shape of honeycomb substrate
Than the waste gas purification apparatus being capable of activated in advance exhaust gas purifying catalyst.
And, compared with the past honeycomb substrate can be made close to internal combustion engine side, be typically configured in honeycomb therefore, it is possible to increase
The capacity of the exhaust emission control filter in the downstream of carrier.
And, as described in detail below, in accordance with the invention it is possible to make the waste gas stream of inflow exhaust gas cleaning catalyst uniformly,
The pressure loss and heat deterioration can be reduced.
Preferably it is also equipped with Abgassensor (temperature sensor 92 for example described later), it is arranged on described waste gas ingress pipe
On, there is the detecting element portion (detecting element portion 920 for example described later) extending to described cellular set side.
In the invention, the Abgassensor with the detecting element portion extending to cellular set side is arranged on waste gas to lead
Enter on pipe.
As described above, the upstream-side end surface of honeycomb substrate inclines with respect to the central axis of the upstream-side end surface of waste gas ingress pipe
Tiltedly, and relative with waste gas ingress pipe side.Therefore, it is possible to arrange the detection of Abgassensor to cellular set side in the way of extending
Element portion.Waste gas thereby, it is possible to avoid high temperature directly impacts Abgassensor fastening part such that it is able to suppress Abgassensor
Thermic load, suppress its heat deterioration.
The effect of invention
In accordance with the invention it is possible to provide a kind of waste gas purification apparatus of cheap internal combustion engine, its compared with the past can be fast
Speed makes exhaust gas purifying catalyst heat up, and enables to the waste gas stream of inflow exhaust gas cleaning catalyst uniformly, can reduce pressure
Loss and heat deterioration.
Brief description
Fig. 1 is the figure of the waste gas purification apparatus of the internal combustion engine illustrating an embodiment of the invention.
Fig. 2 is the figure of the waste gas purification apparatus illustrating conventional internal combustion engine.
Fig. 3 is that the waste gas illustrating high flow capacity flows into the figure of velocity flow profile during conventional honeycomb substrate.
Fig. 4 is that the waste gas illustrating high flow capacity flows into the figure of the velocity flow profile during honeycomb substrate of present embodiment.
Fig. 5 is that the waste gas illustrating low discharge flows into the figure of the velocity flow profile during honeycomb substrate of present embodiment.
Fig. 6 is the figure schematically showing the situation of honeycomb substrate that waste gas flows into present embodiment.
Fig. 7 is to schematically show the figure that waste gas flows into the conventional situation of honeycomb substrate.
Fig. 8 is to schematically show the figure that waste gas flows into the conventional situation of honeycomb substrate.
Fig. 9 is the relation with inlet pressure for the mass flow of the waste gas of the waste gas purification apparatus illustrating present embodiment
Figure.
Figure 10 is the figure with the relation of UI value for the mass flow of the waste gas of the waste gas purification apparatus illustrating present embodiment.
Figure 11 is the figure of the manufacture method of the waste gas purification apparatus for present embodiment is described.
Label declaration
1：Waste gas purification apparatus；
2：Waste gas ingress pipe；
11：Honeycomb substrate；
20：Waste gas approaching face；
21：The upstream-side end surface of waste gas ingress pipe；
92：Temperature sensor (Abgassensor)；
110：The upstream-side end surface of honeycomb substrate；
111：The downstream-side end surface of honeycomb substrate；
920：Detecting element portion；
E：Engine room；
X1：The central axis of the upstream-side end surface of waste gas ingress pipe.
Specific embodiment
Hereinafter, referring to the drawings an embodiment of the invention is illustrated.
Fig. 1 is the figure of the waste gas purification apparatus of the internal combustion engine illustrating an embodiment of the invention.
As shown in figure 1, the waste gas purification apparatus 1 of present embodiment configures in engine room E, (not shown) being loaded into
Internal combustion engine on vehicle is (hereinafter referred to as " electromotor ".) vicinity (underface) configure in its vehicle front side.Present embodiment
Electromotor be the direct Diesel engine to the indoor spray fuel of burning of each cylinder (not shown).
The waste gas purification apparatus 1 of present embodiment and the downstream being arranged on the flue gas leading (not shown) extending from electromotor
Waste gas ingress pipe 2 connect.
Waste gas ingress pipe 2 is connected with flue gas leading via the turbocharger (not shown) of the downstream being arranged on flue gas leading.
As shown in figure 1, waste gas ingress pipe 2 be formed as from configuration engine side turbocharger to waste gas purification apparatus 1 described later
Upper end extend in a generally horizontal direction.
Herein, Fig. 2 is the figure of the waste gas purification apparatus 1A illustrating conventional internal combustion engine.In fig. 2, to shown in Fig. 1
The corresponding structure of waste gas purification apparatus 1 of present embodiment, after label in FIG, mark A is indicated.
As shown in Figure 2, in conventional waste gas purification apparatus 1A, waste gas ingress pipe 2A is from engine side along approximate horizontal
After direction extends, significantly bend downwards.It follows that the waste gas ingress pipe 2 of present embodiment and conventional waste gas ingress pipe
The shape of 2A has very big difference.
Return Fig. 1, waste gas ingress pipe 2 is with the enlarged diameter towards downstream, upper with waste gas purification apparatus 1 described later
Trip side end face connects.And, the waste gas approaching face 20 being formed by the downstream-side end surface of waste gas ingress pipe 2 is with respect to waste gas ingress pipe
The central axis X 1 of 2 upstream-side end surface 21 tilts.This waste gas approaching face 20 is as described later along the upstream of honeycomb substrate 11
Side end face 110.
On the top of waste gas ingress pipe 2, it is sequentially installed with LAF sensor 91 and temperature sensor 92 from upstream side.
Stream in waste gas ingress pipe 2 is detected in the detecting element portion 910 that LAF sensor 91 passes through to insert in waste gas ingress pipe 2
The air-fuel ratio of logical waste gas.
Stream in waste gas ingress pipe 2 is detected in the detecting element portion 920 that temperature sensor 92 passes through to insert in waste gas ingress pipe 2
The temperature of logical waste gas.
Herein, as shown in figure 1, the detecting element portion 920 of the temperature sensor 92 of present embodiment is to cellular set described later
Body 11 side extends.This configuration structure because waste gas ingress pipe 2 is with the enlarged diameter towards downstream, and by side downstream
The waste gas approaching face 20 that face is formed obliquely configures to the direction relative with upstream-side end surface 21 with respect to central axis X 1 and forms
For possibility.
On the other hand, as shown in Fig. 2 in conventional temperature sensor 92A, its detecting element portion 920A is towards upstream
Engine side extends.Thus in the present embodiment, with conventional distinctive points, i.e. honeycomb substrate 11 and waste gas ingress pipe
2 shape, the configuration structure in detecting element portion 920 of temperature sensor 92 from the past different.
Return Fig. 1, waste gas purification apparatus 1 is cylindrical shape, makes the state towards roughly vertical direction for its center axis X2
Under, along the side configuration of the vehicle front side of electromotor.Therefore, waste gas flows in waste gas purification apparatus 1 from the top to the bottom
Dynamic, in this process, NOx, CO and HC in waste gas are cleaned, and the particle-like substance in waste gas is (hereinafter referred to as simultaneously
“PM”.) be removed.
As shown in figure 1, waste gas purification apparatus 1 possesses exhaust gas purifying catalyst portion 10, diesel particulate filter (hereinafter referred to as
“DPF”.) 12 and housing 13.Exhaust gas purifying catalyst portion 10 and DPF12 are accommodated in single housing 13, closer to each other
Ground configuration.
Exhaust gas purifying catalyst portion 10 purifies NOx, CO and the HC in waste gas.Exhaust gas purifying catalyst portion 10 is by carrying
The honeycomb substrate 11 of exhaust gas purifying catalyst is constituted, and is stored in housing 13 via holding pad (not shown).
Honeycomb substrate 11 is made up of the honeycomb substrate of circulation type.That is, honeycomb substrate 11 is that trip side end face 110 extends from it
Become the honeybee that (not shown) multiple cells of exhaust flow path are divided and formed by the next door of Porous to downstream-side end surface 111
Nest carrier.
As the material of honeycomb substrate 11, enumerate cordierite, aluminium titanates or mullite.Shape to honeycomb substrate 11,
Describe in detail below.
Using oxidation catalyst, NOx catalyst as exhaust gas purifying catalyst.For example, including in Pt, Pd and Rh extremely
Few a kind of noble metal, zeolite, Ba and Ce.Purify NOx, CO and the HC in waste gas using this exhaust gas purifying catalyst.
DPF12 traps the PM in waste gas.DPF12 is made up of the filter carrying PM combustion catalyst, via not shown
Holding pad be stored in housing 13.
Filter is created as the columned wall-flow filter that section is substantially positive round.As the material of filter,
Enumerate carborundum (SiC), cordierite, aluminium titanates or mullite.
PM combustion catalyst is substantially evenly carried on whole filter, and thus, burning removes passes through filter traps
PM.Using at least one noble metal for example including in Pt, Pd and Ag catalyst as PM combustion catalyst.This Ag system
PM combustion catalyst has PM energy of oxidation the most excellent, and can be from more low temperature to PM compared with other PM combustion catalysts
Carry out oxidation, purification.
Housing 13 is cylindrical shape, as described above, storage exhaust gas purifying catalyst portion 10 and DPF12.Housing 13 is by gold such as SUS
Belong to and constituting.Housing 13 is made up of the housing parts of clamshell style, and this housing parts is divided into two in the circumferential by along central axis X 2
Case half bodies constitute.Housing 13 be by make this two case half bodies abut each other welding and integration and formed.
Then, see figures.1.and.2, describe the shape of honeycomb substrate 11 in detail.
As shown in figure 1, honeycomb substrate 11, in being formed as the columned honeycomb substrate that section is substantially positive round, has it
The shape that the upstream-side end surface 110 of one side in central axis X 2 direction tilts with respect to this central axis X 2.And, this upstream
Side end face 110 configures in the way of the waste gas approaching face 20 along waste gas ingress pipe 2 connects.Thus, the upstream of honeycomb substrate 11
Side end face 110 is configured to the central axis X 1 of the upstream-side end surface 21 with respect to waste gas ingress pipe 2, to upstream-side end surface 21
Relative direction tilts.
On the other hand, as shown in Fig. 2 conventional honeycomb substrate 11A be cylindric, have its upstream-side end surface 110A with
The trip side end face 111A shape vertical with respect to central axis X 2A.And, this upstream-side end surface 110A is configured to respect to useless
Central axis X 1A of the upstream-side end surface 21A of gas ingress pipe 2A is almost parallel.
Thus, the shape of upstream-side end surface 110 of the honeycomb substrate 11 of present embodiment is very big with conventional difference.
Then, with reference to Fig. 3～Fig. 5, the waste gas velocity flow profile in the waste gas purification apparatus 1 of present embodiment is said
Bright.
Fig. 3 is the figure of the velocity flow profile illustrating that the waste gas of high flow capacity flows into during the conventional honeycomb substrate 11A shown in Fig. 2.
Fig. 4 is that the waste gas illustrating high flow capacity flows into the figure of the velocity flow profile during honeycomb substrate 11 of present embodiment.Fig. 5 is to illustrate low stream
The waste gas of amount flows into the figure of the velocity flow profile during honeycomb substrate 11 of present embodiment.
Herein, respectively illustrate in Fig. 3～Fig. 5：A waste gas velocity flow profile that the shape of () waste gas ingress pipe causes, (b) hold
It is loaded with waste gas velocity flow profile, (c) overall giving up that the length of the central axis direction of the honeycomb substrate of exhaust gas purifying catalyst causes
Gas velocity is distributed.That is, velocity flow profile each (c) is obtained by the comprehensive velocity flow profile of (a) and the velocity flow profile of (b).
As shown in figure 4, under the operating condition obtaining the high exhaust gas flow of comparison, positioned at carrying exhaust gas purifying catalyst
The impact that brought of shape of the waste gas ingress pipe 2 of the upstream side of honeycomb substrate 11 and honeycomb substrate 11 central axis X 2 side
To short the brought impact of length offset.Its result understands, the velocity flow profile of waste gas is stable, formed with conventional shown in Fig. 3
The equal velocity flow profile of honeycomb substrate 11A.
And, as shown in figure 5, after exhaust gas flow is for the electromotor just starting of low discharge, waste gas is preferential to be flowed into close to pressure
That side (engine side) of the low entrance of power loss.Thus, it can be known that the waste gas flow velocity close to that side of entrance increases.But now,
Because exhaust gas flow is low, do not affect exhaust-gas purifying performance, persistently overheating close to that side of the preferential entrance flowing into of waste gas on the contrary, from
And by activated in advance, improved by this exhaust-gas purifying performance.
Then, with reference to Fig. 6～Fig. 8, to the stabilisation of the velocity flow profile of the waste gas purification apparatus 1 of present embodiment, pressure
The reduction of loss, Abgassensor detect that the raising of performance illustrates.
Fig. 6 is the figure schematically showing the situation of honeycomb substrate 11 that waste gas flows into present embodiment.Fig. 7 and Fig. 8 is to show
Meaning property illustrates that waste gas flows into the figure of the conventional situation of honeycomb substrate.
Understand in the conventional waste gas purification apparatus 1B shown in Fig. 7, due to there is waste gas ingress pipe 2B in honeycomb substrate
The structure that the vicinity of 11B significantly bends, waste gas collides the wall of waste gas ingress pipe 2B, thus waste gas stream bending.In this situation
Under, in waste gas ingress pipe 2B, the flow velocity of waste gas produces larger lateral deviation.
And understand, in the conventional waste gas purification apparatus 1C shown in Fig. 8, waste gas ingress pipe 2C is with towards cellular set
Body 11C side and tilt downwards, be the shape not having bending section, therefore waste gas stream directly encounters the upstream side of honeycomb substrate 11C
End face.In this case although the flow velocity of waste gas does not produce lateral deviation, but the diameter of waste gas ingress pipe 2C reduces gradually in midway,
Therefore waste gas stream is integrally throttled, and the result pressure loss improves, and exhaust-gas purifying performance declines.
On the other hand, in the waste gas purification apparatus 1 of the present embodiment with said structure, as shown in fig. 6, from electromotor
The waste gas stream discharged and circulate in flue gas leading is difficult to affecting of the wall by waste gas ingress pipe 2.That is, in honeycomb substrate 11,
After in electromotor discharge is in flue gas leading, the waste gas stream of circulation directly encounters the upstream-side end surface 110 of honeycomb substrate 11, waste gas
Stream is rectified and bends, and is imported in each unit lattice.
Therefore, in the waste gas purification apparatus 1 of present embodiment, compared with conventional waste gas purification apparatus, the stream of waste gas
Speed there is no a lateral deviation and become stable it is ensured that uniform waste gas stream, the result pressure loss reduces.And, in order to detect flowing
Mean state, if waste gas stream is uneven, the accuracy of detection of the LAF sensor 91 that can not correctly detect is high.And, in this reality
Apply in mode, in waste gas ingress pipe 2, the waste gas stream of circulation is overall uniformly, therefore few to the configuration limits of LAF sensor 91, cloth
The design freedom of office is high.
Then, with reference to Fig. 7 and Fig. 8, the reduction to the heat deterioration of the waste gas purification apparatus 1 of present embodiment illustrates.
As described above, in the conventional waste gas purification apparatus 1B shown in Fig. 7, waste gas in the bending section of waste gas ingress pipe 2B
Bias current big.Therefore, when high load capacity, a part for the exhaust gas purifying catalyst near bending section is concentrated and is exposed to high temperature.In
It is that waste gas flows into the exhaust gas purifying catalyst heat deterioration of most positions, result exhaust-gas purifying performance is substantially impaired.
On the other hand, in the waste gas purification apparatus 1 of present embodiment, as described above, waste gas does not have lateral deviation, except this it
Outward, the upstream-side end surface of honeycomb substrate 11 is inclined plane, compared with the past accepts waste gas with more large area, therefore, it is possible to disperse to give up
The heat of gas, result is compared with the past can to suppress heat deterioration.
And, in the waste gas purification apparatus 1 of present embodiment, for LAF sensor 91 and temperature sensor 92, also lead to
Cross the no waste gas stream of lateral deviation and the thermic load of each sensor will be suppressed in Min..And, as described above, can be relatively
In the flow direction of waste gas and anon-normal to but the side that tilts sets up each sensor, therefore, it is possible to make the fastening of each sensor
Portion avoids the direct impact of the waste gas of high temperature.
Next, the waste gas flowing exhaust into present embodiment to making electromotor operate under the operating condition of regulation is net
Inlet pressure (pressure at upstream-side end surface 110) during gasifying device 1 and UI value (the UI value at upstream-side end surface 110) are said
Bright.
Herein, Fig. 9 be illustrate the mass flow of the waste gas of waste gas purification apparatus 1 of present embodiment and inlet pressure (on
Trip side end face 110 at pressure) relation figure.Figure 10 is the matter of the waste gas of waste gas purification apparatus 1 illustrating present embodiment
The figure of the relation of amount flow and UI value (the UI value at upstream-side end surface 110).
In addition, to implement to measure as the conventional product in Fig. 9 and Figure 10 using the waste gas purification apparatus 1A shown in Fig. 2.
And herein, UI value is adopted by the index as the flow uniformity of fluid, by following formula (1)
Calculate and obtain.
[formula 1]
UI=1- Σ { | Vi-Vave | × Si/ (2 × Vave × S) } ... formula (1)
In above-mentioned formula (1), Vi represents the flow velocity (exhaust gas concentration) in each region having split flowing path section, Vave table
Show the mean flow rate (section exhaust gas concentration) in whole flowing path section.And, Si represents the area in each region, S represents that stream cuts
The gross area in face.
As shown in figure 9, can confirm that：According to the waste gas purification apparatus 1 of present embodiment, with conventional waste gas purification apparatus
1A compares, and can reduce by about 25% pressure loss.
And, as shown in Figure 10, can confirm that the UI value of the waste gas purification apparatus 1 of present embodiment is net with conventional waste gas
Gasifying device 1A is equal.If additionally, UI value is more than 0.9, it is judged as good.
Then, with reference to Figure 11, the manufacture method of the waste gas purification apparatus 1 of present embodiment is illustrated.
The waste gas purification apparatus 1 of present embodiment is for example carried out as follows manufacture.
First, samely, obtain that there is the columned honeycomb substrate wishing length using extrusion molding.It
Afterwards, cut columned honeycomb substrate so that the end face of a side of the central axis direction of honeycomb substrate is with respect to central shaft
Line is inclined plane.Thus, the end face obtaining two sides from columned honeycomb substrate is the honeycomb substrate of inclined plane.Cutting
Afterwards, by being sintered under the sintering condition of regulation, obtain the honeycomb substrate 11 of present embodiment.
Next, as shown in figure 11, prepare cylindric and one end rolls oblique special fixture 100, using this fixture 100
The peripheral end tilting surface side of fixed cellular carrier 11 is carried out in the end tilting surface side.Then, in this condition, make fixture 100
After side impregnated in the suspension of exhaust gas purifying catalyst, using suction pump etc. from honeycomb substrate 11 and fixture 100 side phase
Anti- side is aspirated, and thus imports suspension in each unit lattice of honeycomb substrate 11.After suction, enter at the specified temperature
Row sintering, thus obtains carrying the honeycomb substrate 11 of exhaust gas purifying catalyst on the next door of each unit lattice.
Afterwards samely, by being stored in the honeycomb substrate 11 and DPF12 that carry exhaust gas purifying catalyst
In housing 13, to manufacture the waste gas purification apparatus 1 of present embodiment.Thus, only improve conventional manufacture method just can manufacture
The waste gas purification apparatus 1 of present embodiment, therefore manufacturing time and finished material rate are as in the past it is not required that big sets
Standby investment.
According to the waste gas purification apparatus 1 of present embodiment, play following effect.
In the present embodiment, it is arranged in engine room E in the waste gas purification apparatus 1 of vicinity of electromotor, make
Waste gas ingress pipe 2 is with the enlarged diameter towards downstream, and waste gas ingress pipe 2 is arranged to be formed by side end face downstream
Waste gas approaching face 20 with respect to the upstream-side end surface 21 of this waste gas ingress pipe 2 central axis X 1 to this upstream-side end surface 21
Relative direction tilts.And, the honeycomb substrate 11 carrying exhaust gas purifying catalyst is arranged to so that its upstream-side end surface
110 along waste gas ingress pipe 2 waste gas approaching face 20.
Thus, the upstream-side end surface 110 of honeycomb substrate 11, the i.e. entrance side of waste gas inflow of exhaust gas purifying catalyst are carried
End face be configured to the central axis X 1 of the upstream-side end surface 21 with respect to waste gas ingress pipe 2 and tilt, and with waste gas ingress pipe 2
Side is relatively.Therefore, it is possible to honeycomb substrate 11 being configured the position of the bending section to conventional waste gas ingress pipe, therefore with conventional phase
Ratio can make exhaust gas purifying catalyst close to engine side, thus the waste gas that can make high temperature compared with the past flows into waste gas purification
Catalyst.Therefore, according to present embodiment, by such cheap means, energy are improved to the shape of honeycomb substrate 11
The waste gas purification apparatus 1 being capable of activated in advance exhaust gas purifying catalyst compared with the past is enough provided.
And, compared with the past honeycomb substrate 11 can be made close to engine side, be typically configured in honeybee therefore, it is possible to increase
The capacity of the DPF12 in the downstream of nest carrier 11.That is, length L1 in central axis X 2 direction of the DPF12 of Fig. 1 is configured to compare
The length L2 length in central axis X 2 direction of the DPF12A of Fig. 2.
And, as described above, according to present embodiment, the waste gas stream of inflow exhaust gas cleaning catalyst can be made uniformly, energy
Enough reduce the pressure loss and heat deterioration.
And in the present embodiment, will there is the temperature sensing in the detecting element portion 920 extending to honeycomb substrate 11 side
Device 92 is arranged on waste gas ingress pipe 2.
As described above, the upstream-side end surface 110 of honeycomb substrate 11 is with respect in the upstream-side end surface 21 of waste gas ingress pipe 2
Heart axis X 1 tilts, and relative with waste gas ingress pipe 2 side.Therefore, it is possible to arrange temperature in the way of extending to honeycomb substrate 11 side
The detecting element portion 920 of degree sensor 92.Thereby, it is possible to avoid the fastening of the waste gas of high temperature direct impact temperature sensor 92
Portion, such that it is able to the thermic load of suppression temperature sensor 92, suppresses its heat deterioration.
In addition, the invention is not restricted to above-mentioned embodiment, the deformation in the range of the object of the invention, improvement can reached
It is included in the present invention.
Claims (2)
1. a kind of waste gas purification apparatus of internal combustion engine, this waste gas purification apparatus is arranged on the vicinity of internal combustion engine in engine room,
Purify the waste gas of described internal combustion engine,
The waste gas purification apparatus of described internal combustion engine possesses：
Waste gas ingress pipe, it is connected with the downstream of the flue gas leading extending from described internal combustion engine；
The honeycomb substrate of column, it is connected with the downstream of described waste gas ingress pipe, is divided and be formed with by the next door of Porous
Multiple cells, the plurality of cell extends to downstream-side end surface and becomes waste gas from the upstream-side end surface of this honeycomb substrate
Stream；And
Exhaust gas purifying catalyst, it is carried on described honeycomb substrate,
Described waste gas ingress pipe is configured to the enlarged diameter towards downstream, and the downstream side by this waste gas ingress pipe
Face formed waste gas approaching face with respect to the upstream-side end surface of this waste gas ingress pipe central axis to this upstream-side end surface phase
To direction tilt,
The upstream-side end surface of described honeycomb substrate is formed along the waste gas approaching face of described waste gas ingress pipe.
2. the waste gas purification apparatus of internal combustion engine according to claim 1, wherein,
The waste gas purification apparatus of described internal combustion engine is also equipped with Abgassensor, and this Abgassensor is arranged on described waste gas ingress pipe
On, there is the detecting element portion extending to described cellular set side.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015163150A JP2017040225A (en) | 2015-08-20 | 2015-08-20 | Exhaust emission control device of internal combustion engine |
| JP2015-163150 | 2015-08-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106468204A true CN106468204A (en) | 2017-03-01 |
| CN106468204B CN106468204B (en) | 2019-12-24 |
Family
ID=58206439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610647616.7A Active CN106468204B (en) | 2015-08-20 | 2016-08-09 | Exhaust gas purification device for internal combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2017040225A (en) |
| CN (1) | CN106468204B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018143949A (en) * | 2017-03-03 | 2018-09-20 | 三菱日立パワーシステムズ株式会社 | Exhaust gas treatment equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5881553A (en) * | 1996-05-23 | 1999-03-16 | Scambia Industrial Developments Aktiengesellschaft | Exhaust manifold |
| CN1415411A (en) * | 2001-11-01 | 2003-05-07 | 日产自动车株式会社 | Purification catalyst for waste gas |
| CN101052793A (en) * | 2005-02-04 | 2007-10-10 | 丰田自动车株式会社 | Exhaust gas purifying apparatus for internal combustion engine |
| FR2938006A3 (en) * | 2008-11-03 | 2010-05-07 | Renault Sas | Exhaust gas depollution device i.e. catalytic converter, for internal combustion engine of motor vehicle, has structure with face that is extended in oblique plane to reduce angle between gas flow and face for assuring distribution of gas |
| CN102365436A (en) * | 2009-03-27 | 2012-02-29 | 排放技术有限公司 | Honeycomb body for an exhaust gas purification system |
-
2015
- 2015-08-20 JP JP2015163150A patent/JP2017040225A/en active Pending
-
2016
- 2016-08-09 CN CN201610647616.7A patent/CN106468204B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5881553A (en) * | 1996-05-23 | 1999-03-16 | Scambia Industrial Developments Aktiengesellschaft | Exhaust manifold |
| CN1415411A (en) * | 2001-11-01 | 2003-05-07 | 日产自动车株式会社 | Purification catalyst for waste gas |
| CN101052793A (en) * | 2005-02-04 | 2007-10-10 | 丰田自动车株式会社 | Exhaust gas purifying apparatus for internal combustion engine |
| FR2938006A3 (en) * | 2008-11-03 | 2010-05-07 | Renault Sas | Exhaust gas depollution device i.e. catalytic converter, for internal combustion engine of motor vehicle, has structure with face that is extended in oblique plane to reduce angle between gas flow and face for assuring distribution of gas |
| CN102365436A (en) * | 2009-03-27 | 2012-02-29 | 排放技术有限公司 | Honeycomb body for an exhaust gas purification system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017040225A (en) | 2017-02-23 |
| CN106468204B (en) | 2019-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6140509B2 (en) | Wall flow type exhaust gas purification filter | |
| EP1952884B1 (en) | Catalyst for exhaust-gas purification | |
| US10557398B2 (en) | Exhaust pipe structure for internal combustion engine | |
| CN102112713B (en) | Exhaust gas purifying device | |
| JP6299856B1 (en) | Engine exhaust system | |
| CN102733911A (en) | Exhaust treatment system for internal combustion engine | |
| JP6445228B1 (en) | Exhaust gas purification catalyst | |
| JP2013142363A (en) | Exhaust emission control device of diesel engine | |
| US8105545B2 (en) | Engine exhaust gas purifier | |
| CN104632327B (en) | Catalytic converter | |
| CN110088442B (en) | Exhaust device of engine | |
| JP5166848B2 (en) | Exhaust purification device | |
| CN106468204A (en) | The waste gas purification apparatus of internal combustion engine | |
| KR101261949B1 (en) | catalyst unit | |
| JP2017040239A (en) | Exhaust emission control device | |
| US20080317645A1 (en) | Selective Reduction Catalyst and Engine Exhaust Gas Purifier Using the Same | |
| JP2006189027A (en) | Exhaust gas purifying filter | |
| JP6753179B2 (en) | Oxidation catalyst and exhaust gas purification system | |
| JP2018178882A (en) | Exhaust post-treatment device | |
| JP6729721B2 (en) | Engine exhaust system | |
| JP5839663B2 (en) | Exhaust gas purification device | |
| JP6805948B2 (en) | Exhaust purification device | |
| JP2015218680A (en) | Exhaust emission control device | |
| JP6319412B1 (en) | Engine exhaust system | |
| JP2006257920A (en) | Exhaust emission control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |