CN109236445A - A kind of engine exhaust system - Google Patents
A kind of engine exhaust system Download PDFInfo
- Publication number
- CN109236445A CN109236445A CN201811008134.2A CN201811008134A CN109236445A CN 109236445 A CN109236445 A CN 109236445A CN 201811008134 A CN201811008134 A CN 201811008134A CN 109236445 A CN109236445 A CN 109236445A
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- Prior art keywords
- branch pipe
- exhaust
- grain catcher
- cylinder
- exhaust system
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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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
- F01N13/107—More than one exhaust manifold or exhaust collector
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a kind of engine exhaust systems, wherein including cylinder, exhaust branch pipe, convergence tube and aftertreatment assembly；The quantity of the exhaust branch pipe is equal with the quantity of the cylinder and is multiple, multiple exhaust branch pipes and multiple cylinder one-to-one correspondence；One end of the exhaust branch pipe is connected with the corresponding cylinder, and the other end of multiple exhaust branch pipes is connected with the convergence tube；The convergence tube is connected with the aftertreatment assembly.The disclosure can prevent the exhaust interference of exhaust branch pipe.
Description
Technical field
The present invention relates to technical field of engines, especially a kind of engine exhaust system.
Background technique
The design of engine exhaust system will not only consider specific chassis arrangement, and length, caliber of exhaust system etc. are all
To consider the flowing of exhaust gas.Phenomenon is flow backwards to make each cylinder exhaust interference not occur exhaust, and is arranged as far as possible using inertia
Exhaust branch pipe should be made as long as possible by gas, and should be mutually indepedent between each cylinder branch pipe, and length is as equal as possible.Gasoline engine point increases
Press type and non pressurized type.The exhaust of pressurization type is generally cast aluminium manifold, and pipe range is shorter, and branch pipe, which converges, is followed by catalyst converter whirlpool
Turbine is pressurized air inlet, and gas enters ternary catalyzing unit after turbine and carries out catalyzed conversion, some gasoline engines have two
Grade catalyst converter, is then finally discharged through silencer again.Non pressurized type is also referred to as natural aspiration type, and the pipe range of manifold is longer, with
Reach higher exhaust uniformity, tail gas is directly entered ternary catalyzing unit and carries out catalyzed conversion, follow-up system and pressurization type class
Seemingly.The volume of catalytic converter is the product of sectional area and length, and hole density is mesh number/wall thickness, and hole density and sectional area determine
The size of catalyst converter via hole and specific surface area, to determine its catalyzed conversion ability.
Fig. 1 is please referred to, Fig. 1 is the structural schematic diagram of four cylinder engine exhaust system disclosed in the prior art；Wherein wrap
1 ' of cylinder, 2 ' of exhaust branch pipe, 3 ' of preceding catalyst converter, 4 ' of rear catalyst converter, 5 ' of preceding lambda sensor, 6 ' of post oxygen sensor, 7 ' of silencer are included,
Before current engine exhaust system generally uses four exhaust branch pipes 2 ' to be directly accessed on the air inlet front-end-cone of 3 ' of catalyst converter, and
2 ' of exhaust branch pipe is set to export the center against catalyst converter as far as possible.Preceding 5 ' of lambda sensor is housed, for monitoring exhaust on air inlet end cone
In oxygen content.It is vented premenstrual 3 ' catalyzed conversion of catalyst converter, into rear 4 ' of catalyst converter, rear 4 rear end ' of catalyst converter is sensed equipped with rear oxygen
6 ' of device, for monitoring the oxygen content in catalyzed conversion final vacuum, (catalyst converter volume+rear catalyst converter) is generally in 1.5L or so, hole
Density is generally in 600cpsi/4.3mil or bigger.
Due to the limitation of outlet form and sensor position, 2 ' of exhaust branch pipe can not keep away 2 ' of exhaust branch pipe in the prior art
Exempt from gas outlet mutually to avoid completely, thus the gas that not can avoid the two cylinders discharge of adjacent igniting is mutually dry in 2 ' of exhaust branch pipe
It relates to, exhaust effect is bad.
Summary of the invention
It is an object of the present invention to provide a kind of engine exhaust systems, to solve deficiency in the prior art, its energy
Enough avoid the problem that the gas of the two cylinders discharge of adjacent ignition order interferes in exhaust branch pipe.
The present disclosure proposes a kind of engine exhaust systems, wherein including cylinder, exhaust branch pipe, convergence tube and post-processing
Component；
The quantity of the exhaust branch pipe is equal with the quantity of the cylinder and is multiple, multiple exhaust branch pipes and more
A cylinder corresponds；
One end of the exhaust branch pipe and the corresponding cylinder are connected, and the other end of multiple exhaust branch pipes is and institute
Convergence tube is stated to be connected；The convergence tube is connected with the aftertreatment assembly；
The convergence tube is equipped with contraction flow region, and the diameter of the contraction flow region is less than the straight of the remainder of the convergence tube
Diameter.
Optionally, the convergence tube includes converging general pipeline and at least two to converge branch pipe；
The contraction flow region is located at described converge on general pipeline；
Each described one end for converging branch pipe is connected to at least two exhaust branch pipes；It is described to converge the another of branch pipe
End is connected to the general pipeline that converges.
Optionally, the quantity of the cylinder is 4, and the quantity for converging branch pipe is 2, it is each described converge branch pipe with
2 exhaust branch pipe connections.
Optionally, same two cylinders converged on branch pipe are connected in same a period of time by the exhaust branch pipe
It is respectively at suction stroke and working stroke quarter, or same two converged on branch pipe is connected to by the exhaust branch pipe
The cylinder is respectively at compression travel and instroke in synchronization.
Optionally, the engine exhaust system further includes deflector, an edge of the deflector and two rows
The connection of gas branch pipe intersection, the deflector are located at described converge in branch pipe.
Optionally, the length of the deflector is the half for converging branch length of tube.
Optionally, it is 30-70 degree that the angle between the center line of branch pipe is converged described in two.
Optionally, the contraction flow region is located at the half converged on general pipeline length direction, described to converge general pipeline
It is become larger along the intermediate orient diameter to both ends, and the diameter of described one end adjacent to the aftertreatment assembly of converging general pipeline is big
In the diameter for converging the neighbouring described one end for converging branch pipe general pipeline.
Optionally, the aftertreatment assembly includes catalyst converter, grain catcher, differential pressure pickup, exhaust main and control
Device；
The general pipeline that converges is connect with the catalyst converter, and the catalyst converter is connect with the exhaust main；
The grain catcher is mounted in the exhaust main；
One test side of the differential pressure pickup is mounted on one end of the grain catcher, the installation of another test side
In the other end of the grain catcher；The differential pressure pickup is used to detect the pressure difference at the grain catcher both ends；
The differential pressure pickup, the grain catcher are connected with controller；
The controller for judging whether the pressure difference at the grain catcher both ends is greater than preset value, if it is,
The grain catcher heating is controlled so that the particle on the grain catcher aoxidizes.
Optionally, lambda sensor and post oxygen sensor before the aftertreatment assembly further includes；
The preceding lambda sensor is installed in the exhaust main, is contained with detecting the oxygen of the tail gas in the exhaust main
Amount；
The post oxygen sensor is mounted in the exhaust main, and the post oxygen sensor is located at the catalyst converter and institute
It states between grain catcher；The post oxygen sensor is used to detect oxygen content in the tail gas after catalyst converter catalysis.
The present invention between catalyst converter and exhaust branch pipe by connecting a convergence tube, by the way that convergence tube, Neng Goufang is arranged
The gas that only single exhaust branch pipe is discharged enters other exhaust branch pipes, influences the exhaust of other cylinders.When being beneficial to prevent exhaust
It interferes.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the structural schematic diagram of four cylinder engine exhaust system disclosed in the prior art；
Fig. 2 is the structural schematic diagram for the four cylinder engine exhaust system that the specific embodiment of the invention proposes；
Fig. 3 is the mounting structure schematic diagram for the convergence tube that the specific embodiment of the invention proposes；
Fig. 4 is the structural schematic diagram for the convergence tube that the specific embodiment of the invention proposes；
Fig. 5 is the structural schematic diagram of the convergence tube in another example that the specific embodiment of the invention proposes；
Fig. 6 is the cross-sectional view for the convergence tube that the specific embodiment of the invention proposes；
Fig. 7 is the attachment structure schematic diagram for converging branch pipe and exhaust branch pipe that the specific embodiment of the invention proposes；
Fig. 8 is the mounting structure schematic diagram for converging branch pipe that the specific embodiment of the invention proposes.
Description of symbols:
1'- cylinder, 2'- exhaust branch pipe, catalyst converter before 3'-, catalyst converter after 4'-, lambda sensor before 5'-, oxygen senses after 6'-
Device, 7'- silencer；
1- cylinder, 2- exhaust branch pipe, 3- convergence tube, 4- aftertreatment assembly, 5- deflector, 6- installation set, 7- temperature sensing
Device, 8- exhaust gas recirculation valve, 9- silencer, 10- controller.
31- converges general pipeline, and 32- converges branch pipe；
311- contraction flow region；
41- catalyst converter, 42- grain catcher, 43- differential pressure pickup, lambda sensor before 44-, 45- post oxygen sensor.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
Referring to figure 2. with 3, the specific embodiment of the invention proposes a kind of engine exhaust system, wherein including cylinder
1, exhaust branch pipe 2, convergence tube 3 and aftertreatment assembly 4.
The quantity of the exhaust branch pipe 2 is equal with the quantity of the cylinder 1 and is multiple, multiple exhaust branch pipes 2
It is corresponded with multiple cylinders 1.Specifically, one end of the exhaust branch pipe 2 is connected with the corresponding cylinder 1, multiple
The other end of the exhaust branch pipe 2 is connected with the convergence tube 3；The convergence tube 3 is connected with the aftertreatment assembly 4, institute
Convergence tube 3 is stated equipped with contraction flow region 311, the diameter of the contraction flow region 311 is less than the diameter of the remainder of the convergence tube 3.
The contraction flow region 311 is located at described converge on general pipeline 31.Further, exhaust branch pipe 2 described in any two is far from the cylinder 1
One end between angle be not more than 90 degree.
When it is implemented, the gas being discharged by difference cylinder 1 enters convergence tube by corresponding exhaust branch pipe 2, via
Convergence tube is able to enter in aftertreatment assembly 4.Angle between the exhaust branch pipe 2 as described in any two is not more than 90 degree,
The gas that an exhaust branch pipe 2 is discharged can be beneficial to prevent and enter other exhaust branch pipes, can reduce exhaust branch pipe 2 it
Between interference, while being more advantageous to and tail gas be discharged in aftertreatment assembly 4 using the inertia of tail gas itself.
Optionally, Fig. 6 is arrived referring to figure 3., and the convergence tube 3 includes converging general pipeline 31 and at least two to converge branch pipe 32.
Each described one end for converging branch pipe 32 is connected to at least two exhaust branch pipes 2.The other end for converging branch pipe 32
It is connected to the general pipeline 31 that converges.When it is implemented, quantity and each institute of the quantity for converging branch pipe 32 according to cylinder
It states and converges the quantity of the corresponding exhaust branch pipe 2 of branch pipe 32 to determine.Such as six cylinder engine, if it is corresponding each to converge branch pipe 32
The quantity of the exhaust branch pipe 2 is 3, then, the quantity for converging branch pipe 32 just should be 2.In this way, being converged by setting
Branch pipe 32 and converge general pipeline 31, the quantity for being directly accessed the pipeline for converging general pipeline 31 can be reduced；Simultaneously as difference cylinder 1
Stroke locating for synchronization is different, is connected to same converge on branch pipe 32 to avoid passing through exhaust branch pipe 2 completely
Cylinder 1 has an impact in exhaust.By increasing the quantity of point, to reduce the quantity for the pipeline that each point accesses,
Be conducive to for the cylinder 1 of different trips being connected to by exhaust branch pipe 2 and same converge branch pipe 32.It so, it is possible farthest
It is interfered when reducing exhaust.
Optionally, referring to figure 2. and Fig. 3, the quantity of the cylinder 1 is 4, and the quantity for converging branch pipe 32 is 2,
Converge branch pipe 32 and 2 exhaust branch pipe 2 described in each to connect.That is, for four cylinder engine, it is described to converge branch pipe 32
Quantity be 2, the branch pipe 32 that converges connects two exhaust branch pipes 2.Six cylinder engine or eight cylinder engine are come
It says, the quantity for converging branch pipe 32 can be set as needed and each converges the quantity of branch pipe 32.In particular it is required that the item met
Part is that the product of the quantity for converging branch pipe 32 and each quantity for converging the exhaust branch pipe 2 on branch pipe 32 is equal to
The quantity of cylinder 1.
Optionally, same converge on branch pipe 32 two cylinders 1 are connected to same by the exhaust branch pipe 2
One moment was respectively at suction stroke and working stroke, or was connected to by the exhaust branch pipe 2 and same described converges branch pipe 32
On two cylinders 1 be respectively at compression travel and instroke in synchronization.In this way, making described converge on branch pipe 32
Two cylinders 1 locating for cylinder stroke it is different, as synchronization is respectively at suction stroke and working stroke or same
Moment is respectively at compression travel and instroke, can prevent in the case where exhaust valve does not completely close, by other gas
The exhaust of cylinder 1 influences.
Optionally, Fig. 7 is please referred to, the engine exhaust system further includes deflector 5, an edge of the deflector 5
It is connect with two 2 intersections of exhaust branch pipe, the deflector is located at described converge in branch pipe 32.By the way that deflector 5 is arranged,
The tail gas in the exhaust branch pipe 2 can be made to enter along deflector 5 to converge in branch pipe 32, to realize the effect of water conservancy diversion, prevented
The tail gas that exhaust branch pipe 2 is discharged enters in same other exhaust branch pipes 2 converged on branch pipe 32.Further, the water conservancy diversion
The length of plate 5 is the half for converging 32 length of branch pipe.In order to further increase the effect of exhaust interference, the deflector 5
Extending into the length converged in branch pipe 32 is the half for converging 32 length of branch pipe.That is, as in a kind of embodiment, it is described
The length for converging branch pipe 32 is 50mm, then the length of the deflector 5 is 25mm, and the length of deflector 5 described herein refers to
The deflector 5 is along the size converged on 32 direction of branch pipe.
Still by taking four cylinder engine as an example, in order to further increase anti-tampering effect；It is connect with the same branch pipe 32 that converges
Two exhaust branch pipes 2 be arranged in parallel close to described one end for converging branch pipe 32, so, it is possible to allow two exhaust branch pipes 2
Outgassing direction it is consistent.Specifically, Fig. 8 is please referred to, in order to realize above-mentioned installation effect, still further comprises installation set 6, it is described
The section of installation set 6 is D font, and the installation set 6 is set on the exhaust branch pipe 2, and is located at going out for the exhaust branch pipe 2
At mouthful.The plate fitting for two installation sets 6 being connected on same two exhaust branch pipes 2 converged on branch pipe 32 connects
It connects.
Optionally, referring to figure 3., it is 30-70 degree that the angle between the center line of branch pipe 32 is converged described in two.It is specific real
Shi Shi can be 30 degree, 35 degree, 40 degree, 45 degree, 50 degree, 55 degree, 60 degree, 65 degree, 70 degree etc..It so, it is possible to prevent the remittance
It closes branch pipe 32 and enters another converge in branch pipe 32 too much during exhaust.
Optionally, the contraction flow region 311 is located at the half converged on 31 length direction of general pipeline；It is described to converge
General pipeline 31 becomes larger along the intermediate orient diameter to both ends, and the general pipeline 31 that converges is adjacent to the one of the aftertreatment assembly 4
The diameter at end is greater than the diameter for converging the neighbouring described one end for converging branch pipe 32 general pipeline 31.In one embodiment, described
Converging general pipeline 31 is waist pyramidal structure, and minimum diameter is 70mm.It, can be effective by the sectional area mutation for making to converge general pipeline 31
It avoids pressure at expulsion from reducing suddenly, guarantees the uniformity of exhaust.In another embodiment, general pipeline 31 can also be converged directly for described
Extension at diameter minimum is 20mm.So, it is possible, which makes to be vented uniformity, improves 2%-3%.
Optionally, referring to figure 2., the aftertreatment assembly 4 includes catalyst converter 41, grain catcher 42, differential pressure pickup
43, exhaust main and controller 10.
The general pipeline 31 that converges is connect with the catalyst converter 41, and the catalyst converter 41 is connect with the exhaust main.It is described
Grain catcher 42 is mounted in the exhaust main.One test side of the differential pressure pickup 43 is mounted on the particle and catches
One end of storage 42, another test side are mounted on the other end of the grain catcher 42；The differential pressure pickup 43 is used for
Detect the pressure difference at 42 both ends of grain catcher.The differential pressure pickup 43, the grain catcher 42 are and controller
10 are connected.The controller 10 for judging whether the pressure difference at 42 both ends of grain catcher is greater than preset value, if so,
The heating of grain catcher 42 is then controlled so that the particle on the grain catcher 42 aoxidizes；Specifically, the controller
10 can issue the signal of grain catcher heating, so that the grain catcher 42 heats, to reach the oxidation particle
The effect of particle on trap 42.If it is not, then not heating the grain catcher 42.Certainly, the differential pressure pickup 43
It can also play the role of other, e.g., according to the size of pressure difference to determine whether needing replacing or cleaning grain catcher 42.
When it is implemented, temperature sensor 7 can also be arranged in the front end of grain catcher 42, by the way that temperature sensing is arranged
Device 7, can be to the temperature for entering 42 tail gas of grain catcher；It can also be directly by judging into the tail gas of grain catcher 42
Whether temperature reaches initiation temperature to control whether heated particle trap 42.If can not reach initiation temperature, control
Heated particle trap 42 heats.
Still by taking four cylinder engine as an example, the length of four exhaust branch pipes is respectively 298mm, 287mm, 285mm,
305mm.The length for converging branch pipe 32 and the length for converging general pipeline 31 are 50mm, between catalyst converter 41 and grain catcher 42
The sum of length of length of pipe and the catalyst converter 41 is 400mm or so, so can be avoided tail gas and enters grain catcher 42
Exhaust temperature too low the problem of being unable to reach initiation temperature when interior.
Specifically, catalyst converter volume is 1L, and hole density 750cpsi/2.5mil, the volume of grain catcher 42 is 2L.
Optionally, lambda sensor 44 and post oxygen sensor 45 before the aftertreatment assembly 4 further includes.
The preceding lambda sensor 44 is installed in the exhaust main, to detect the oxygen of the tail gas in the exhaust main
Content.
The post oxygen sensor 45 is mounted in the exhaust main, and the post oxygen sensor 45 is located at the catalyst converter
Between 41 and the grain catcher 42.The post oxygen sensor 45 is used to detect in the tail gas after the catalyst converter 41 catalysis
Oxygen content.Specifically, the oxygen content in exhaust system is monitored by preceding lambda sensor 44 and post oxygen sensor 45.Pass through
With the cooperation of controller 10, come judge catalyst converter 41 whether need clean or repair.Such as measured according to using preceding lambda sensor 44
Value and the value that measures of post oxygen sensor 45 make poor, when the small Mr. Yu's fixed value of gained difference, then illustrate the need of catalyst converter 41
It cleans or repairs.
It specifically, further include exhaust gas recirculation valve 8 and recirculation pipe, one end of the recirculation pipe is connected to the catalysis
On pipeline between device 41 and the grain catcher 42, the other end is connected in air inlet pipe；The exhaust gas recirculation valve 8 is installed
On the recirculation pipe.
Specifically, further include silencer 9, the silencer 9 is mounted on exhaust main, and the silencer 9 be located at
After grain trap 42, to reduce exhaust noise.
It will be appreciated to those of skill in the art that grain catcher is used to trap the particulate matter that burning generates, GPF's is risen
Should be not less than by firing temperature by 450 DEG C.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (10)
1. a kind of engine exhaust system, which is characterized in that including cylinder, exhaust branch pipe, convergence tube and aftertreatment assembly；
The quantity of the exhaust branch pipe is equal with the quantity of the cylinder and is multiple, multiple exhaust branch pipes and multiple institutes
State cylinder one-to-one correspondence；
One end of each exhaust branch pipe is connected with the corresponding cylinder, and the other end of the exhaust branch pipe converges with described
Pipe is connected；The convergence tube is connected with the aftertreatment assembly；
The convergence tube is equipped with contraction flow region, and the diameter of the contraction flow region is less than the diameter of the remainder of the convergence tube.
2. engine exhaust system according to claim 1, which is characterized in that the convergence tube includes converging general pipeline and extremely
Few two are converged branch pipe；
The contraction flow region is located at described converge on general pipeline；
Each described one end for converging branch pipe is connected to at least two exhaust branch pipes；The other end for converging branch pipe is equal
It is connected to the general pipeline that converges.
3. engine exhaust system according to claim 2, which is characterized in that the quantity of the cylinder is 4, the remittance
The quantity for closing branch pipe is 2, each described to converge branch pipe and connect with 2 exhaust branch pipes.
4. engine exhaust system according to claim 3, which is characterized in that be connected to by the exhaust branch pipe same
Two converged on branch pipe the cylinder is respectively at suction stroke and working stroke in synchronization；Alternatively,
It is connected to by the exhaust branch pipe and same described converge two cylinders on branch pipe and be respectively in synchronization
Compression travel and instroke.
5. engine exhaust system according to claim 3, which is characterized in that the engine exhaust system further includes leading
Flowing plate, an edge of the deflector are connect with two exhaust branch pipe intersections, and the deflector converges branch positioned at described
In pipe.
6. engine exhaust system according to claim 5, which is characterized in that the length of the deflector is described converge
The half of branch length of tube.
7. engine exhaust system according to claim 3, which is characterized in that converge described in two branch pipe center line it
Between angle be 30-70 degree.
8. engine exhaust system according to claim 3, which is characterized in that the contraction flow region converges general pipeline positioned at described
At half on length direction；The general pipeline that converges becomes larger along the intermediate orient diameter to both ends, and described converges
Diameter of the general pipeline adjacent to one end of the aftertreatment assembly is greater than the general pipeline that converges adjacent to the straight of described one end for converging branch pipe
Diameter.
9. engine exhaust system according to claim 1, which is characterized in that the aftertreatment assembly include catalyst converter,
Grain catcher, differential pressure pickup, exhaust main and controller；
The general pipeline that converges is connect with the catalyst converter, and the catalyst converter is connect with the exhaust main；
The grain catcher is mounted in the exhaust main；
One test side of the differential pressure pickup is mounted on one end of the grain catcher, another test side is mounted on institute
State the other end of grain catcher；The differential pressure pickup is used to detect the pressure difference at the grain catcher both ends；
The differential pressure pickup, the grain catcher are connected with controller；
The controller is for judging whether the pressure difference at the grain catcher both ends is greater than preset value, if it is, control
The grain catcher heating is so that the particle on the grain catcher aoxidizes.
10. engine exhaust system according to claim 9, which is characterized in that the aftertreatment assembly further includes preceding oxygen
Sensor and post oxygen sensor；
The preceding lambda sensor is installed in the exhaust main, to detect the oxygen content of the tail gas in the exhaust main；
The post oxygen sensor is mounted in the exhaust main, and the post oxygen sensor is located at the catalyst converter and described
Between grain trap；The post oxygen sensor is used to detect oxygen content in the tail gas after catalyst converter catalysis.
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|---|---|---|---|
| CN201811008134.2A CN109236445A (en) | 2018-08-31 | 2018-08-31 | A kind of engine exhaust system |
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| CN201811008134.2A CN109236445A (en) | 2018-08-31 | 2018-08-31 | A kind of engine exhaust system |
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| JPS5844211A (en) * | 1981-09-09 | 1983-03-15 | Yamaha Motor Co Ltd | Purifying device of exhaust gas from engine |
| CN1475661A (en) * | 2002-07-30 | 2004-02-18 | 日产自动车株式会社 | Engine exhausting device |
| CN201062535Y (en) * | 2007-06-08 | 2008-05-21 | 安徽江淮汽车股份有限公司 | 2.0LCBR engine exhausting manifold |
| CN201982161U (en) * | 2011-04-18 | 2011-09-21 | 克康(上海)排气控制系统有限公司 | Automobile engine exhaust manifold with Y-shaped connecting structure |
| CN204851408U (en) * | 2015-06-01 | 2015-12-09 | 华晨汽车集团控股有限公司 | Indulge and put engine close coupling exhaust manifold subassembly |
| CN207332994U (en) * | 2017-10-24 | 2018-05-08 | 安徽江淮汽车集团股份有限公司 | One kind exhaust pipe assembly |
-
2018
- 2018-08-31 CN CN201811008134.2A patent/CN109236445A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5844211A (en) * | 1981-09-09 | 1983-03-15 | Yamaha Motor Co Ltd | Purifying device of exhaust gas from engine |
| CN1475661A (en) * | 2002-07-30 | 2004-02-18 | 日产自动车株式会社 | Engine exhausting device |
| CN201062535Y (en) * | 2007-06-08 | 2008-05-21 | 安徽江淮汽车股份有限公司 | 2.0LCBR engine exhausting manifold |
| CN201982161U (en) * | 2011-04-18 | 2011-09-21 | 克康(上海)排气控制系统有限公司 | Automobile engine exhaust manifold with Y-shaped connecting structure |
| CN204851408U (en) * | 2015-06-01 | 2015-12-09 | 华晨汽车集团控股有限公司 | Indulge and put engine close coupling exhaust manifold subassembly |
| CN207332994U (en) * | 2017-10-24 | 2018-05-08 | 安徽江淮汽车集团股份有限公司 | One kind exhaust pipe assembly |
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Address after: 230601 No. 99 Ziyun Road, Hefei Economic and Technological Development Zone, Anhui Province Applicant after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 No. 669 Shixin Road, Taohua Industrial Park, Hefei City, Anhui Province Applicant before: Anhui Jianghuai Automobile Group Limited by Share Ltd |
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