CN110469434A - A kind of exhaust gas recooling system - Google Patents
A kind of exhaust gas recooling system Download PDFInfo
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- CN110469434A CN110469434A CN201910760672.5A CN201910760672A CN110469434A CN 110469434 A CN110469434 A CN 110469434A CN 201910760672 A CN201910760672 A CN 201910760672A CN 110469434 A CN110469434 A CN 110469434A
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- exhaust gas
- air
- heat
- engine
- inlet
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
- F02B29/0425—Air cooled heat exchangers
- F02B29/0431—Details or means to guide the ambient air to the heat exchanger, e.g. having a fan, flaps, a bypass or a special location in the engine compartment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/32—Liquid-cooled heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/33—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage controlling the temperature of the recirculated gases
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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
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses a kind of exhaust gas recooling systems；The system increases exhaust gas aftercooler in the cooling system of primary motivation, so that a part of exhaust gas of engine discharge is mixed into engine after supercooling with fresh air, to be lowered into the temperature that engine participates in burning gases；The cooling system reaches the heat exchange of cold wind and hot wind by air-cooled, to achieve the purpose that reduce inlet manifold intake air temperature；The system can reduce the heat that water cooling cooler for recycled exhaust gas spills into water-cooling system, and because only increasing cooler, and vacant a large amount of space, be easily arranged in vehicle；Gas engine and other higher cooling problems of high detonation pressure engine intake air temperature can be solved, high pass filter diesel oil EGR route engine also can refer to the invention and solve the problems, such as cooling.
Description
[technical field]
The invention belongs to heavy-duty car components manufacturing fields, and in particular to a kind of exhaust gas recooling system.
[background technique]
Automobile exhaust emission standard constantly upgrades, and six engine of natural gas state is transitioned into equivalent by original lean burn and fires
It burns, and increases EGR exhaust recirculating system.The water-cooling system heat dissipation capacity of this route engine is in high EGR rate operating point ratio
Originally state five increases 50%-80%, therefore the bottle for being matched as restricting the design of six standard gas vehicle of state of vehicle cooling system
Neck.In addition gas engine inlet manifold intake air temperature is excessively high to easily cause combustion knock, therefore develops one kind and do not increase water
The exhaust gas cooling device of cooling system heat dissipation capacity is at key to solve this problem；A kind of scheme is directly to carry out wind to high-temp waste gas
It is cold, but vehicle is not easy to arrange, it is high to the technical requirements of intercooler；Therefore develop it is a kind of on arrangement influence less, part adds
Work manufacturing process is of less demanding, and the exhaust gas cooling device for not increasing the heat of water-cooling system is highly desirable.
[summary of the invention]
It is an object of the invention to overcome the above-mentioned prior art, a kind of exhaust gas recooling system is provided；The device
It is easier to arrange, it is good to realize, gas engine and other higher cooling problems of high detonation pressure engine intake air temperature can be solved.
In order to achieve the above objectives, the present invention is achieved by the following scheme:
A kind of exhaust gas recooling system, including water cooling cooler for recycled exhaust gas and air-air intercooler, the air inlet of the air-air intercooler
End is connected to the inlet end of the cooling system of engine, and the exhaust end of air-air intercooler is connected to the inlet manifold of engine；Institute
The air inlet pipeline for stating water cooling cooler for recycled exhaust gas is connected to the exhaust manifold of engine, and the gas exhaust piping of water cooling ERG cooler is connected to
Exhaust gas aftercooler, the escape pipe of exhaust gas aftercooler are connected to the connecting line of air-air intercooler and inlet manifold；Exhaust gas is again
The type of cooling of cooler is air-cooled.
A further improvement of the present invention is that:
Preferably, control valve is provided between water cooling cooler for recycled exhaust gas and exhaust gas aftercooler, control valve is three-phase flow electricity
Valve is controlled, the inlet end of control valve is the gas exhaust piping of water cooling ERG cooler, and the first branch for controlling valve exhaust is connected to exhaust gas again
The inlet end of cooler, the second branch for controlling valve exhaust are connected to air-air intercooler and induction manifold joint pipe road；Control valve
The rotation angle ω of its automatically controlled spool is adjusted by controller.
Preferably, controller is PID controller；It is set with the target temperature A of inlet manifold in controller, works as inlet manifold
Intake air temperature T0When less than target temperature A, controller adjustment control valve makes gaseous effluent stop cooling；Work as inlet manifold
Intake air temperature T0When >=target temperature A, controller is according to the load η of engine and the delivery temperature T of water cooling cooler for recycled exhaust gas1It adjusts
The rotation angle ω of automatically controlled spool in whole control valve, and then adjust the gas flow in exhaust gas aftercooler.
Preferably, the rotation angle ω of its automatically controlled spool is fed back to controller by angular transducer by control valve.
Preferably, exhaust gas aftercooler includes core assembly, and be separately positioned on core assembly both ends inlet plenum and
Discharge chamber；Be provided with several heat-dissipating pipes in core assembly, heat-dissipating pipe from top to bottom array be arranged in inlet plenum and discharge chamber it
Between；One end of each heat-dissipating pipe is connected to inlet plenum, and the other end is connected to discharge chamber；Inlet plenum and water cooling ERG cooler
Gas exhaust piping connection, discharge chamber are connected to the escape pipe of exhaust gas aftercooler.
Preferably, the top of core assembly is provided with upper guard board, and bottom is provided with lower backplate；Upper guard board and lower backplate
It is arranged between inlet plenum and discharge chamber.
Preferably, it is provided with expansion structure on upper guard board and lower backplate, the expansion structure is bulge-structure；Upper guard board
It is respectively provided between its adjacent heat-dissipating pipe, between adjacent heat-dissipating pipe and between lower backplate and heat-dissipating pipe adjacent thereto
There is heat-radiation belt；Heat-radiation belt is folded by heat sink, and the heat sink is used to assist the heat-dissipating pipe of upper part and the heat dissipation of lower part
Pipe heat dissipation.
Preferably, the cross section of the heat-dissipating pipe is round rectangle；Inlet plenum passes through air inlet and water cooling ERG cooler
Gas exhaust piping connection, discharge chamber are connected to by gas outlet with the escape pipe of exhaust gas aftercooler；Air inlet and air outlet setting exists
Cornerwise both ends on core assembly same plane.
Preferably, described air-cooled for fan of the exhaust gas aftercooler by motor head, or the electron wind being separately provided
Fan cooling；The material of exhaust gas aftercooler is stainless steel.
Preferably, the exhaust gas aftercooler and the integrated arrangement of air-air intercooler, partition are provided therebetween, so that two
Person is independent cavity.
Compared with prior art, the invention has the following advantages:
The invention discloses a kind of exhaust gas recooling system, in former cooling system, the entrance water cooling ERG that is discharged from engine
The exhaust gas temperature of cooler is higher, and high-power gas engine water cooling cooler for recycled exhaust gas cannot carry out enough coolings to exhaust gas, adds
Upper gas engine is more sensitive to the temperature for the mixed gas that participation is so burnt, and temperature is excessively high to generate phenomenon of detonation；The system
In the cooling system of primary motivation increase exhaust gas aftercooler so that engine discharge a part of exhaust gas after supercooling with
Fresh air is mixed into engine, to be lowered into the temperature that engine participates in burning gases；The cooling system passes through wind
It is cold, reach the heat exchange of cold wind and hot wind, to achieve the purpose that reduce inlet manifold intake air temperature；The system can reduce water cooling
Cooler for recycled exhaust gas spills into the heat of water-cooling system, and because only increase cooler, and vacant a large amount of space, vehicle are easy
In arrangement；It can solve gas engine and other higher cooling problems of high detonation pressure engine intake air temperature, high pass filter diesel oil EGR
Route engine also can refer to the invention and solve the problems, such as cooling.
Further, exhaust gas aftercooler adjusts its working condition by control valve, and control valve adjusts it by controller
The rotation angle ω of automatically controlled spool, adjust exhaust gas aftercooler in gas flow, and then adjust its outlet extraction flow and
The cooling degree of inlet manifold air inlet.
Further, calibration has target temperature in controller, it is contemplated that when environment temperature or relatively low engine load,
Intake manifold temperature monitors the load of inlet manifold intake air temperature and engine using engine controller without too low at any time,
To determine whether exhaust gas accesses the Aftercooling device, achievees the purpose that intelligent control participates in so burning exhaust gas temperature, can change significantly
It is kind so to burn performance, achieve the effect that solar term consumption reduction improves again and discharges pollutants.
Further, control valve is fed back by angular transducer to controller, to adjust the electrically-controlled valve in control valve at any time
The rotation angle of core.
Further, be provided with several heat-dissipating pipes in exhaust gas aftercooler, heat-dissipating pipe respectively with inlet plenum and discharge chamber
Connection, when waste gas stream flows in heat-dissipating pipe, is achieved the purpose that cooling by air-cooled.
Further, upper guard board and lower backplate can play the purpose for supporting entire core assembly.
Further, it is provided with expansion structure on upper guard board and lower backplate, so that upper guard board and lower backplate have centainly
Tensility, to eliminate the thermal stress that the left and right gas chamber temperature difference generates heat-dissipating pipe and heat-radiation belt.
Further, the cross section of heat-dissipating pipe is preferably round rectangle, increases cooling gas circulation area and keeps stress equal
It is even；The setting of air inlet and air outlet diagonal line improves the uniformity of gas flowing in managing to make full use of each heat-dissipating pipe to radiate,
Improve heat dissipation performance and reliability.
Further, exhaust gas aftercooler can utilize the fan coolling of engine, and electronic fan can also be separately provided
It is cooling, it is adjusted with specific reference to the different location of entire exhaust gas recooling system arrangement；The material selection stainless steel of exhaust gas, prevents from giving up
Corrosive deposit in gas corrodes tube wall.
Further, exhaust gas aftercooler and air-air intercooler can integrate arrangement, and partition is provided therebetween, so that
The two is two cavitys alone, and the two is facilitated to be cooled down simultaneously using the mechanical fans of engine.
[Detailed description of the invention]
Fig. 1 is the cooling principle figure of exhaust gas recooling system in the present invention；
Fig. 2 is the two-dimensional structure figure of exhaust gas Aftercooling device in the present invention；
Fig. 3 is the tomograph of exhaust gas Aftercooling device in the present invention；
Fig. 4 is exhaust gas flow control valve functional block diagram in the present invention；
Fig. 5 is a kind of schematic diagram of mounting means of exhaust gas Aftercooling device in the present invention；
Fig. 6 is the structural schematic diagram that exhaust gas Aftercooling device uses electronic fan cooling in the present invention；
Fig. 7 is the main view of main leaf in the present invention；
Fig. 8 is the top view of main leaf in the present invention；
Fig. 9 is the schematic diagram of expansion structure in the present invention.
Wherein: 1- engine；2- water cooling cooler for recycled exhaust gas；The 3- first branch；4- controller；5- control valve；6- exhaust gas is cold again
But device；7- escape pipe；8- second branch；9- temperature sensor；10- air-air intercooler；11- fan；12- booster；13- exhaust
Manifold；14- inlet manifold；15- inlet plenum；16- core assembly；17- discharge chamber；18- partition；19- electronic fan；The bottom 21-；
22- second sidewall；23- upper side wall；24- lower wall；25- expansion structure；15-1- air inlet；16-1- main leaf；It is protected on 16-2-
Plate；Backplate under 16-3-；16-4- heat-radiation belt；16-5- heat-dissipating pipe；The first slot bottom of 16-1-1-；16-1-2- the first side wall；16-1-
3- through-hole；The gas outlet 17-1-.
[specific embodiment]
The invention will be described in further detail in the following with reference to the drawings and specific embodiments.In the description of the present invention, it needs
It is noted that the orientation of the instructions such as term " center ", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outside"
Or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, and
It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore
It is not considered as limiting the invention；Term " first ", " second ", " third " are used for description purposes only, and should not be understood as
Indication or suggestion relative importance；Furthermore unless specifically defined or limited otherwise, term " installation ", " connected ", " connection " are answered
It is interpreted broadly, for example, it may be being fixedly connected, may be a detachable connection；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
Referring to Fig. 1, the invention discloses a kind of exhaust gas recooling systems, are arranged in former cooling system, specifically, should
Cooling device is arranged between water cooling cooler for recycled exhaust gas 2 and the inlet manifold 14 of engine 1.
Referring to Fig. 1, in the cooling system of primary motivation 1, the booster outlet side of entire engine 1 and air-air intercooler 10
Inlet end connection, the inlet manifold 14 of the output end of air-air intercooler 10 and engine 1 connects；Engine 1 is discharged after doing work
Exhaust gas be discharged by exhaust manifold 13,13 output end of exhaust manifold is provided with branch, and a branch enters booster 12, passes through
Booster 12 is discharged, and another enters water cooling cooler for recycled exhaust gas 2, and the gas exhaust piping of water cooling cooler for recycled exhaust gas 2 is connected to cold in absolutely empty
Connecting line between the output end and inlet manifold 14 of device 10, so that the portion that engine 1 is discharged is water cooled EGR cooling
The gas mixing being discharged after device 2 is cooling and by air-air intercooler 10, is input to jointly in engine 1, the front end setting of engine 1
There is fan 11, drive fan 11 to rotate while engine 1 works, fan 11 is used to provide cold source for air-air intercooler 10.
Referring to Fig. 1, exhaust gas recooling system of the invention is arranged between water cooling cooler for recycled exhaust gas 2 and inlet manifold 14, packet
Include engine 1, water cooling cooler for recycled exhaust gas 2, the first branch 3, controller 4, control valve 5, exhaust gas aftercooler 6, escape pipe 7, second
Branch 8, temperature sensor 9, air-air intercooler 10, fan 11, exhaust manifold 13 and inlet manifold 14；In water cooling cooler for recycled exhaust gas 2
Control valve 5 is added on output end gas exhaust piping, control valve 5 is three-phase flow electrically-controlled valve, and inlet end is water cooling cooler for recycled exhaust gas 2
Gas exhaust piping, all the way output end be the first branch 3, the first branch 3 be exhaust gas aftercooler 6 air inlet pipeline, another way
Output end is second branch 8, and second branch 8 is connected directly to the connecting line between air-air intercooler 10 and inlet manifold 14
On；Control valve 5 and controller 4, which are electrically connected, is simultaneously controlled by controller 4, controller 4 by adjusting automatically controlled spool in control valve 5 rotation
Gyration, and then control on-off, the first branch 3 gas flow passed through of the first branch 3 and the on-off of second branch 8.
Controller 4 is PID controller, and control parameter is the air outlet temperature of the load of engine 1, water cooling cooler for recycled exhaust gas 2
T1With the intake air temperature T of inlet manifold 140, related to the load of engine 1 for latter two parameter；In addition to this, start
The load of machine 1 is related to the working condition of air-air intercooler 10, and the load of engine 1 is bigger, then the air inflow needed is bigger, this
When air-air intercooler 10 cooling effect can decline, when the load of engine 1 is smaller, then the air inflow needed is smaller, this space-time
The cooling effect of air inter cooler 10 can be promoted；For the delivery temperature T of water cooling cooler for recycled exhaust gas 21, when the load of engine 1 increases
When, the delivery temperature T of exhaust manifold 131Increase, then the delivery temperature T of corresponding water cooling cooler for recycled exhaust gas 21It increases, when engine 1
Load reduction when, the delivery temperature of exhaust manifold 13 reduces, then the delivery temperature T of corresponding water cooling cooler for recycled exhaust gas 21It reduces；
Therefore, when the load of engine 1 increases, the delivery temperature T of water cooling cooler for recycled exhaust gas 21It increases, the cooling of air-air intercooler 10
Effect decline, the intake air temperature T of corresponding inlet manifold 140It will increase；When the load reduction of engine 1, then corresponding water
The delivery temperature T of cold cooler for recycled exhaust gas 21It reduces, while the cooling effect of air-air intercooler 10 improves, corresponding inlet manifold 14
Intake air temperature T0It can decline；Controller 4 is respectively connected to the output end and inlet manifold of water cooling cooler for recycled exhaust gas 2 by electric wire
14 inlet end is provided with temperature sensor 9 two junctions, with the air outlet temperature of real-time detection water cooling cooler for recycled exhaust gas 2
T1With the intake air temperature T of inlet manifold 140。
14 intake air temperature T of inlet manifold is provided in controller 40Target value A, as intake air temperature T0Less than target value A
When, the load of engine 1 is smaller at this time, i.e. the intake air temperature T of engine 10It is cold separately through air-air intercooler 10 and water cooling EGR
But the cooling system of device 2 can meet the intake air temperature requirement of engine 1, not need the cooling of exhaust gas recooling system, at this time
Controller 4 cuts off the first branch 3 by adjusting control valve 5, i.e., entire exhaust gas recooling system no longer works；As intake air temperature T0
When >=target value A, exhaust gas recooling system is started to work, and sets the rotation angle of the automatically controlled spool of control valve 5 as ω, engine
1 load is the delivery temperature T of η, water cooling cooler for recycled exhaust gas 21, then ω is η and T1Function, three is inputted in the controller 4
Functional relation (1), the relational expression are adjusted according to factors such as different vehicle classes, engines 1；But unified requirement is air inlet discrimination
The intake air temperature T of pipe 10Higher, engine 1 load is bigger, water cooling cooler for recycled exhaust gas 2 delivery temperature T1It is higher, control valve 5
Aperture is bigger, and the exhaust gas flow being passed through in the first branch 3 is bigger, to improve the cooling effect of air inlet in inlet manifold 14；Air inlet
Collector temperature T0Smaller, engine 1 load is smaller, water cooling cooler for recycled exhaust gas 2 delivery temperature T1It is lower, the aperture of control valve 5
Smaller, the exhaust gas flow being passed through in the first branch 3 is smaller, to reduce the cooling effect of air inlet in inlet manifold 14.
ω=f (η, T1) (1)
Referring to fig. 4 it is found that controller 4 controls exhaust gas flow tune by adjusting spool rotation angle degree ω automatically controlled in control valve 5
The aperture of valve is saved, adjustment is by the interior exhausted air quantity flowed of exhaust gas aftercooler 6, and then the cooling for adjusting 14 air inlet of inlet manifold is strong
It spends, the Spool rotating angle ω of control valve 5 can be fed back into controller 4 by angular transducer in corresponding control valve 5；Such as
Spool rotating angle in fruit control valve 5 is not rotated in place, then controller 4 provides instruction it is enabled to continue to rotate, and reaches closed loop
The purpose of control.
Referring to figs. 2 and 3, the exhaust gas aftercooler 6 is a kind of absolutely empty cooler for recycled exhaust gas, including inlet plenum 15, discharge chamber
17 and core assembly 16；The core assembly 16 include heat-dissipating pipe 16-5, heat-radiation belt 16-4, main leaf 16-1, upper guard board 16-2 and
Lower backplate 16-3；Two main leaf 16-1 are arranged in the end of core assembly 16, the outside of main leaf 16-1 and inlet plenum 15
Gas chamber is fixedly connected, the outside of another main leaf 16-1 is fixedly connected with the gas chamber of discharge chamber 17；Two main leaf 16-
It is disposed with upper guard board 16-2, several heat-dissipating pipes 16-5 and lower backplate 16-3 between 1 from top to bottom, the two of upper guard board 16-2
End is fixedly connected with the upper end of two main leaf 16-1 respectively, and the both ends of lower backplate 16-3 are solid with the lower end of two main leaf 16-1 respectively
Fixed connection；The distance between the distance between heat-dissipating pipe 16-5 upper guard board 16-2 adjacent with its, adjacent heat-dissipating pipe 16-5, under
The distance between heat-dissipating pipe 16-5 backplate 16-3 adjacent with its is equal.Heat-dissipating pipe 16-5 upper guard board 16-2 adjacent with its it
Between, between adjacent heat-dissipating pipe 16-5, be provided with heat-radiation belt 16- between lower backplate 16-3 and heat-dissipating pipe 16-5 adjacent thereto
4, several row heat-radiation belt 16-4 are equipped in core assembly 16, and (Fig. 2 and Fig. 3 are the clear pass between performance heat-dissipating pipe 16-5
Heat-radiation belt 16-4 is not indicated complete by system), the both ends of every a line heat-radiation belt 16-4 are respectively heat-dissipating pipe 16-5's connected to it
Both ends.The heat-radiation belt 16-4 is that the heat sink of rectangle folds, when heat sink is between two adjacent heat-dissipating pipe 16-5,
The upper end is fixedly connected with the heat-dissipating pipe 16-5 on top, and lower end is fixedly connected with the heat-dissipating pipe 16-5 of lower part.
Referring to figs. 7 and 8, main leaf 16-1 be trench structure, including the first slot bottom 16-1-1 and with the first slot bottom 16-1-
Through-hole 16-1-3, the through-hole 16-1-3 are offered on the first side wall 16-1-2, the first slot bottom 16-1-1 that 1 two sides are fixedly connected
It is preferred that round rectangle, two the first side wall 16-1-2 are towards the outside of core assembly 16.The preferred fillet in the section of heat-dissipating pipe 16-5
The both ends of rectangle, corresponding each heat-dissipating pipe 16-5 are respectively inserted into the through-hole 16-1-3 of both ends main leaf 16-1, therefore
Each heat-dissipating pipe 16-5 is fixedly connected with two sides inlet plenum 15 or discharge chamber 17.
Referring to Fig. 3, inlet plenum 15 and discharge chamber 17 are box body structure, respectively include the second sidewall 22 of bottom 21, two,
Upper side wall 23 and lower wall 24, either inlet plenum 15 or discharge chamber 17, two second sidewalls 22 correspond to main leaf with it respectively
The first side wall 16-1-2 connection of 16-1, upper side wall 23 are connected with the upper end of the first slot bottom 16-1-1, lower wall 24 and the first slot
The lower end of bottom 16-1-1 is fixedly connected；Because inlet plenum 15 and discharge chamber 17 are box body structure, so that right with its in inlet plenum 15
Answer between main leaf 16-1 and discharge chamber 17 and its correspond to main leaf 16-1 between form cavity body structure.One of inlet plenum 15
The air inlet 15-1 of exhaust gas, the gas outlet 17- being provided in a second sidewall 22 of discharge chamber 17 are provided on two side walls 22
1；Air inlet 15-1 and gas outlet 17-1 is separately positioned in the second sidewall 22 of inlet plenum 15 and the identical direction of discharge chamber 17, into
Port 15-1 and gas outlet 17-1 can be set on the center line of the length direction of core assembly 16, be preferably located on core
The uniformity of gas flowing in managing is improved, heat dissipation is improved to make full use of each heat-dissipating pipe to radiate in cornerwise both ends of assembly 16
Performance and reliability.Air inlet 15-1 is connected to the first branch 3, and gas outlet 17-1 is connected to escape pipe 7.
Referring to 3 and Fig. 9, upper guard board 16-2 and lower backplate 16-3 are plate structure, and it is swollen to be fixedly installed several thereon
Swollen structure 25, the expansion structure 25 are bulge-structure relative to the upper guard board 16-2 or lower backplate 16-3 of plate, pass through expansion
The setting of structure 25, so that upper guard board 16-2 and lower backplate 16-3 has certain tensility, to eliminate the left and right gas chamber temperature difference
The thermal stress that heat-dissipating pipe and heat-radiation belt are generated.
It is described to be connected with exhaust gas on the connecting line of the inlet manifold 14 of the output end and engine 1 of air-air intercooler 10
The output end of Aftercooling device reduces the air inlet temperature of inlet manifold 14 by the exhaust gas after cooling that exhaust gas Aftercooling device is discharged
Degree.The front end face of engine 1 is provided with fan 11,
As shown in figure 5, the exhaust gas recooling system setting in the embodiment can be integrated in former vehicle air-air intercooler 10
Together, internal to be divided by partition 18 or exhaust gas recooling system as shown in Figure 1 and air-air intercooler 10 is adjacent sets
It sets, the front of engine 1 is set；Both arrangements, because of exhaust gas aftercooler 6 and sky in exhaust gas recooling system
Air inter cooler 10 is closer, therefore the two is used in conjunction with the fan 1 of 1 front end of engine and is cooled down.
As shown in fig. 6, inside the vehicle any vacant can be separately provided in the exhaust gas recooling system in the embodiment
Several electronic fans 19, the setting of electronic fan 19 is arranged in the rear end of exhaust gas aftercooler 6 when being separately provided in position
Quantity is determined according to cooling requirement.
The preferred stainless steel of material of the gaseous effluent 6 corrodes tube wall to prevent the corrosive deposit in exhaust gas.
Control function can be integrated in engine controller or entire car controller by the exhaust gas cooling system.
Working principle:
From water cooling ERG cooler 2 export exhaust gas pass into control valve 5 enter exhaust gas aftercooler 6 in, exhaust gas again
It is entered in each heat-dissipating pipe 16-5 in cooler 6 by inlet plenum 15, when being flowed in each heat-dissipating pipe 16-5, by fan 11
Or the cold front heavy rain that electronic fan 19 is discharged, while the heat that sheds of heat-dissipating pipe 16-5 is passed to and is dissipated to each of heat-radiation belt 16
Backing, cold front heavy rain cooling fin, and then the tube wall for increasing heat-dissipating pipe 16-5 passes to the heat of heat-radiation belt 16, accelerates cooling；Quilt
Exhaust gas after cooling is expelled to escape pipe 7 and the mixing of the fresh air after cooling of air-air intercooler 10 by discharge chamber 17, reduces
Into the temperature of the gas to do work in engine 1.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of exhaust gas recooling system, which is characterized in that described including water cooling cooler for recycled exhaust gas (2) and air-air intercooler (10)
The inlet end of air-air intercooler (10) is connected to the inlet end of the cooling system of engine (1), the exhaust of air-air intercooler (10)
End is connected to the inlet manifold (14) of engine (1)；The air inlet pipeline of the water cooling cooler for recycled exhaust gas (2) is connected to engine (1)
Exhaust manifold (13), the gas exhaust piping of water cooling ERG cooler (2) is connected to exhaust gas aftercooler (6), exhaust gas aftercooler
(6) escape pipe (7) is connected to the connecting line of air-air intercooler (10) and inlet manifold (14)；Exhaust gas aftercooler (6)
The type of cooling is air-cooled.
2. a kind of exhaust gas recooling system according to claim 1, which is characterized in that water cooling cooler for recycled exhaust gas (2) and exhaust gas
It is provided between aftercooler (6) control valve (5), control valve (5) is three-phase flow electrically-controlled valve, and the inlet end of control valve (5) is
The first branch (3) of the gas exhaust piping of water cooling ERG cooler (2), control valve (5) exhaust is connected to exhaust gas aftercooler (6)
The second branch (8) of inlet end, control valve (5) exhaust is connected to air-air intercooler (10) and inlet manifold (14) connecting line；
Control valve (5) adjusts the rotation angle ω of its automatically controlled spool by controller (4).
3. a kind of exhaust gas recooling system according to claim 2, which is characterized in that controller (4) is PID controller；
The target temperature A of inlet manifold (14) is set in controller (4), as the intake air temperature T of inlet manifold (14)0Less than target temperature
When spending A, controller (4) adjustment control valve (5) makes gaseous effluent (6) to stop cooling；When the air inlet temperature of inlet manifold (14)
Spend T0When >=target temperature A, controller (4) is according to the load η of engine (1) and the delivery temperature T of water cooling cooler for recycled exhaust gas (2)1
The rotation angle ω of automatically controlled spool in control valve (5) is adjusted, and then adjusts the gas flow in exhaust gas aftercooler (6).
4. a kind of exhaust gas recooling system according to claim 3, which is characterized in that control valve (5) passes through angle sensor
The rotation angle ω of its automatically controlled spool is fed back to controller (4) by device.
5. a kind of exhaust gas recooling system according to claim 1, which is characterized in that exhaust gas aftercooler (6) includes core
Body assembly (16), and it is separately positioned on the inlet plenum (15) and discharge chamber (17) at core assembly (16) both ends；Core assembly
(16) several heat-dissipating pipes (16-5) are provided in, array is arranged in inlet plenum (15) and outlet to heat-dissipating pipe (16-5) from top to bottom
Between room (17)；One end of each heat-dissipating pipe (16-5) is connected to inlet plenum (15), and the other end is connected to discharge chamber (17)；Into
Gas chamber (15) is connected to the gas exhaust piping of water cooling ERG cooler (2), the escape pipe of discharge chamber (15) and exhaust gas aftercooler (6)
(7) it is connected to.
6. a kind of exhaust gas recooling system according to claim 5, which is characterized in that the top of core assembly (16) is set
It is equipped with upper guard board (16-2), bottom is provided with lower backplate (16-3)；Upper guard board (16-2) and lower backplate (16-3) are arranged at
Between inlet plenum (15) and discharge chamber (17).
7. a kind of exhaust gas recooling system according to claim 6, which is characterized in that upper guard board (16-2) and lower backplate
It is provided on (16-2) expansion structure (25), the expansion structure (25) is bulge-structure；Upper guard board (16-2) and its is adjacent
Heat-dissipating pipe (16-5) between, between adjacent heat-dissipating pipe (16-5) and lower backplate (16-3) and heat-dissipating pipe adjacent thereto
Heat-radiation belt (16-4) is provided between (16-5)；Heat-radiation belt (16-4) is folded by heat sink, and the heat sink is for auxiliary
Help the heat-dissipating pipe (16-5) of upper part and heat-dissipating pipe (16-5) heat dissipation of lower part.
8. a kind of exhaust gas recooling system according to claim 5, which is characterized in that the heat-dissipating pipe (16-5) it is transversal
Face is round rectangle；Inlet plenum (15) is connected to by air inlet (15-1) with the gas exhaust piping of water cooling ERG cooler (2), outlet
Room (17) is connected to by gas outlet (17-1) with the escape pipe (7) of exhaust gas aftercooler (6)；Air inlet (15-1) and gas outlet
Cornerwise both ends are arranged on core assembly (16) same plane in (17-1).
9. a kind of exhaust gas recooling system according to claim 1, which is characterized in that described air-cooled for exhaust gas aftercooler
(6) pass through the fan (11) of engine (1) front end, or the electronic fan (19) being separately provided is cooling；Exhaust gas aftercooler (6)
Material is stainless steel.
10. exhaust gas recooling system described in -9 any one according to claim 1, which is characterized in that the exhaust gas cools down again
Device (6) and the integrated arrangement of air-air intercooler (10), partition (18) are provided therebetween, so that the two is independent cavity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910760672.5A CN110469434A (en) | 2019-08-16 | 2019-08-16 | A kind of exhaust gas recooling system |
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| CN201910760672.5A CN110469434A (en) | 2019-08-16 | 2019-08-16 | A kind of exhaust gas recooling system |
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| CN201910760672.5A Pending CN110469434A (en) | 2019-08-16 | 2019-08-16 | A kind of exhaust gas recooling system |
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Cited By (7)
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| CN111878265A (en) * | 2020-03-02 | 2020-11-03 | 广西玉柴机器股份有限公司 | EGR cooling system |
| CN111927658A (en) * | 2020-08-06 | 2020-11-13 | 一汽解放汽车有限公司 | Engine air intake control system and control method |
| CN112377339A (en) * | 2020-12-01 | 2021-02-19 | 广西玉柴机器股份有限公司 | Method and system for separating water vapor from EGR waste gas |
| CN112648070A (en) * | 2021-01-13 | 2021-04-13 | 广东西电动力科技股份有限公司 | Biogas generator set |
| CN113464324A (en) * | 2021-07-27 | 2021-10-01 | 无锡双翼汽车环保科技有限公司 | Multichannel EGR cooler |
| CN114810330A (en) * | 2021-06-01 | 2022-07-29 | 长城汽车股份有限公司 | Intercooling control method and device for diesel vehicle and vehicle |
| CN115217681A (en) * | 2022-07-29 | 2022-10-21 | 潍柴动力股份有限公司 | Control method of EGR system, vehicle and storage medium |
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| CN113464324A (en) * | 2021-07-27 | 2021-10-01 | 无锡双翼汽车环保科技有限公司 | Multichannel EGR cooler |
| CN115217681A (en) * | 2022-07-29 | 2022-10-21 | 潍柴动力股份有限公司 | Control method of EGR system, vehicle and storage medium |
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Application publication date: 20191119 |