CN109667687A - A kind of gas recirculation system and engine - Google Patents
A kind of gas recirculation system and engine Download PDFInfo
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- CN109667687A CN109667687A CN201811619237.2A CN201811619237A CN109667687A CN 109667687 A CN109667687 A CN 109667687A CN 201811619237 A CN201811619237 A CN 201811619237A CN 109667687 A CN109667687 A CN 109667687A
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- turbocharger
- exhaust gas
- egr
- exhaust
- compressor
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- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/08—EGR systems specially adapted for supercharged engines for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional compressor
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- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
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- 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
- F02M26/24—Layout, e.g. schematics with two or more coolers
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- 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
- F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
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- 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
- F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
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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-Gas Circulating Devices (AREA)
- Supercharger (AREA)
Abstract
本发明公开了一种废气再循环系统以及发动机，该系统包括并联于排气歧管之后的废气管路及EGR管路，废气管路包括串联的第一涡轮增压器涡轮机及第二涡轮增压器涡轮机，第二涡轮增压器涡轮机后连接有排气管，EGR管路包括串联的第二涡轮增压器压气机及第一涡轮增压器压气机，第一涡轮增压器压气机的进口连接进气管，出口连接进气歧管；上述废气再循环系统能够提升废气利用率，EGR废气在新鲜空气增压前与之混合，不受进气增压的影响，利用增压废弃加入进气中，可明显提升进入新鲜空气中的废气量，不需要其他提升EGR率的装置及方法，从而在提高EGR率的同时，避免泵气损失、油耗上升、颗粒物排放增加等情况的发生，改善发动机经济性。
The invention discloses an exhaust gas recirculation system and an engine. The system includes an exhaust gas pipeline and an EGR pipeline connected in parallel behind an exhaust manifold, and the exhaust gas pipeline includes a first turbocharger turbine and a second turbocharger connected in series. A compressor turbine, an exhaust pipe is connected behind the second turbocharger turbine, and the EGR pipeline includes a second turbocharger compressor and a first turbocharger compressor connected in series, and the first turbocharger compressor The inlet is connected to the intake pipe, and the outlet is connected to the intake manifold; the above-mentioned exhaust gas recirculation system can improve the utilization rate of exhaust gas, and the EGR exhaust gas is mixed with the fresh air before supercharging, and is not affected by the intake air supercharging. In the intake air, the amount of exhaust gas entering the fresh air can be significantly increased, and other devices and methods for increasing the EGR rate are not required, so as to improve the EGR rate while avoiding the occurrence of pump gas loss, increased fuel consumption, and increased particulate matter emissions, etc. Improve engine economy.
Description
Technical field
The present invention relates to engine EGR technical field, in particular to a kind of gas recirculation system and engine.
Background technique
Exhaust gas recycling (EGR) is that modern diesel engine reduces NOxDischarge one of most effective means.EGR can be reduced in cylinder
Oxygen concentration and maximum combustion temperature, reaching reduces NOxEffect.EGR is considered as that diesel engine meets state IV and later exhaust method
One of important technical of rule.
Existing egr system, as shown in Figure 1, the exhaust manifold 03 of engine 01 is connected with the turbine of turbocharger
06, exhaust pipe 07 is connected with after turbine 06,010 one end of EGR line takes gas before turbine 06, and the other end accesses engine 01
Inlet manifold 02, EGR valve 04 is provided on EGR line, the entrance of the compressor 05 of turbocharger connects air inlet pipe 08, pressure
The outlet of mechanism of qi 05 is connected to inlet manifold 02, and when EGR valve is opened, portion enters turbine 05 to plenum,
Remaining exhaust gas passes through EGR valve 04 and cooler for recycled exhaust gas 011, and the inlet manifold of engine 01 is entered after mixing with pressurized air
02, due to the raising of turbocharger efficiency, pressurized admission pressure can be higher than the row before whirlpool in the quite big range of speeds
Atmospheric pressure, simple EGR valve of opening are difficult to obtain enough EGR rates.To obtain sufficiently large, adjustable EGR rate, NO is reducedx,
Common method is in air inlet pipeline upper air throttle valve 09, and EGR exhaust is mixed in the downstream of intake-air throttle valve 09 and pressurized air
It closes, but intake-air throttle valve 09 can dramatically increase pumping loss while increasing EGR rate, and engine consumption is caused to rise,
Grain object discharge increases, and economy is caused to deteriorate.
Summary of the invention
In view of this, the first purpose of this invention is to provide a kind of gas recirculation system, so that it is improving EGR
While rate, avoid pumping loss, engine consumption rise, it is granular material discharged increase and so on, improve engine warp
Ji property, the second object of the present invention is to provide a kind of engine including above-mentioned gas recirculation system.
To achieve the above object, the invention provides the following technical scheme:
A kind of gas recirculation system, including being parallel to exhaust pipe and EGR line after enmgine exhaust, institute
State the turbine and the second turbocharging that exhaust pipe includes the first turbocharger being sequentially connected in series along exhaust gas flow direction
The turbine of device, exhaust pipe is connected with after the turbine of second turbocharger, and the EGR line includes flowing along exhaust gas
The compressor for the second turbocharger that direction is sequentially connected in series and the compressor of the first turbocharger, first turbine increase
The import of the compressor of depressor connects air inlet pipe, and the outlet of the compressor of first turbocharger connects engine charge discrimination
Pipe.
Preferably, the pipe between the turbine of first turbocharger and the turbine of second turbocharger
Road is connected to by bypass pipe with the exhaust pipe, is provided with exhaust gas control valve on the bypass pipe.
Preferably, the EGR between the compressor and the exhaust manifold of second turbocharger takes is arranged on tracheae
There are filter and/or the first cooler for recycled exhaust gas.
Preferably, between the compressor of second turbocharger and the compressor of first turbocharger
EGR valve is provided in EGR air inlet pipe.
Preferably, the second cooler for recycled exhaust gas is additionally provided in the EGR air inlet pipe.
Preferably, second cooler for recycled exhaust gas is series at after the EGR valve along exhaust gas flow direction.
Preferably, the pipeline between the outlet and the motor intake manifold of the compressor of first turbocharger
On be additionally provided with intercooler.
A kind of engine, including gas recirculation system described in any one as above.
In conclusion the system includes exhaust pipe and EGR pipe the present invention provides a kind of gas recirculation system
Road, wherein exhaust pipe and EGR line are parallel to after enmgine exhaust, and exhaust pipe includes along exhaust gas flowing side
To the turbine for the first turbocharger being sequentially connected in series and the turbine of the second turbocharger, the second turbocharger
Exhaust pipe is connected with after turbine, EGR line includes calming the anger for the second turbocharger being sequentially connected in series along exhaust gas flow direction
The import of the compressor of machine and the first turbocharger, the compressor of the first turbocharger connects air inlet pipe, the first turbine
The outlet of the compressor of booster connects motor intake manifold；
Above-mentioned gas recirculation system uses two-stage turbocharger, in use, the first turbocharger utilizes exhaust
The portion of manifold discharge is pressurized fresh air, and the second turbocharger is useless using the discharge of the first turbocharger
Gas is pressurized another part exhaust gas that exhaust manifold is discharged, and pressurized exhaust gas is passed through to the pressure of the first turbocharger
Mechanism of qi carries out secondary booster, i.e. the compressor combined upstream of fresh air and primary pressurized exhaust gas in the first turbocharger
The compressor pressure of the first turbocharger is entered back into afterwards, is then passed through the inlet manifold of engine again；It can be seen that above-mentioned useless
The energy that gas recirculating system reuses portion pushes the turbine of two-stage turbocharger, improves the utilization of exhaust gas
Rate first mixes EGR exhaust with fresh air, enters back into the after the EGR exhaust pressurization taken out before the first turbocharger
The compressor of one turbocharger is pressurized, and is helped to promote EGR exhaust pressure and is entered the exhausted air quantity of engine, is not necessarily to
EGR rate can be promoted by increasing intake-air throttle valve, thus while improving EGR rate, avoid pumping loss, on engine consumption
Rise, it is granular material discharged increase and so on, improve engine economy, in addition to this, due to the EGR system in above system
System is not influenced by plenum, so that the first turbocharger can be preferable to obtain with the higher compressor of matching efficiency
Oil consumption is horizontal, simultaneously because the promotion of air inlet, can promote delivery temperature, has to the heat management of after-treatment system and significantly mentions
It rises, improves the transformation efficiency of after-treatment system.
The present invention also provides a kind of engines, which includes above-mentioned gas recirculation system, due to above-mentioned
Gas recirculation system has above-mentioned technique effect, and the engine with the gas recirculation system should also have corresponding technology
Effect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of gas recirculation system in the prior art；
Fig. 2 is the structural schematic diagram for the gas recirculation system that the first embodiment of the invention provides；
Fig. 3 is the structural schematic diagram for the gas recirculation system that second of embodiment of the invention provides；
Fig. 4 is the structural schematic diagram for the gas recirculation system that the third embodiment of the invention provides；
Fig. 5 is the structural schematic diagram for the gas recirculation system that the 4th kind of embodiment of the invention provides；
Fig. 6 is the structural schematic diagram for the gas recirculation system that the 5th kind of embodiment of the invention provides；
Fig. 7 is the structural schematic diagram for the gas recirculation system that the 6th kind of embodiment of the invention provides.
In Fig. 1: 01 is engine；02 is inlet manifold；03 is exhaust manifold；04 is EGR valve；05 is turbine；06 is
Compressor；07 is exhaust pipe；08 is air inlet pipe；010 is EGR line；011 is cooler for recycled exhaust gas；012 is intercooler；
In Fig. 2-Fig. 7: 1 is engine；2 be inlet manifold；3 be exhaust manifold；4 take tracheae for EGR；5 is cold for the first EGR
But device；6 be the second turbocharger；601 be the turbine of the second turbocharger；602 calming the anger for the second turbocharger
Machine；7 be exhaust gas control valve；8 be the first turbocharger；801 be the turbine of the first turbocharger；802 be the first turbine
The compressor of booster；9 be air inlet pipe；10 be bypass pipe；11 be exhaust pipe；12 be EGR air inlet pipe；13 is cooling for the 2nd EGR
Device；14 be EGR valve；15 be intercooler.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 2, Fig. 2 is the structural schematic diagram for the gas recirculation system that the first embodiment of the invention provides.
The embodiment of the invention provides a kind of gas recirculation system, which includes exhaust pipe and EGR line.
Wherein, exhaust pipe and EGR line are parallel to after 1 exhaust manifold 3 of engine, and exhaust pipe includes along exhaust gas
The turbine 801 for the first turbocharger 8 that flow direction is sequentially connected in series and the turbine 601 of the second turbocharger 6, the
The turbine 801 of one turbocharger 8 and the turbine 601 of the second turbocharger 6 are sequentially connected in series and refer to the first turbocharging
The entrance of the turbine 801 of device 8 is connected to exhaust manifold 3, the outlet and the second whirlpool of the turbine 801 of the first turbocharger 8
The entrance connection of the turbine 601 of booster 6 is taken turns, the outlet of the turbine 601 of the second turbocharger 6 and exhaust pipe 11 connect
It is logical, exhaust pipe 11 is connected with after the turbine 601 of the second turbocharger 6, EGR line includes successively going here and there along exhaust gas flow direction
The compressor 602 of second turbocharger 6 of connection and the compressor 802 of the first turbocharger 8, the second turbocharger 6
Compressor 602 and the compressor 802 of the first turbocharger 8 be sequentially connected in series the compressor 602 for referring to the second turbocharger 6
Entrance be connected to exhaust manifold 3, the outlet of the compressor 602 of the second turbocharger 6 and first turbocharger 8 are calmed the anger
The entrance of machine 802 is connected to, and the outlet of the compressor 802 of the first turbocharger 8 connects exhaust manifold 3, the first turbocharger 8
The import of compressor 802 connect air inlet pipe 9, i.e. the import of the compressor 802 of the first turbocharger 8 is communicated with air inlet simultaneously
The outlet of pipe 9 and the compressor 602 of the second turbocharger 6, the outlet connection of the compressor 802 of the first turbocharger 8
1 inlet manifold 2 of engine.
In conclusion compared with prior art, gas recirculation system provided in an embodiment of the present invention uses two-stage turbine
Booster, in use, the first turbocharger 8 is pressurized fresh air using the portion that exhaust manifold 3 is discharged,
The exhaust gas that second turbocharger 6 is discharged using the first turbocharger 8 carries out another part exhaust gas that exhaust manifold 3 is discharged
Pressurization, and by pressurized exhaust gas be passed through the first turbocharger 8 compressor 802 carry out secondary booster, i.e., fresh air with
Primary pressurized exhaust gas enters back into the first turbocharger 8 after 802 combined upstream of compressor of the first turbocharger 8
Compressor 802 is pressurized, and is then passed through the inlet manifold 2 of engine 1 again；It can be seen that above-mentioned gas recirculation system repeats benefit
The turbine that two-stage turbocharger is pushed with the energy of portion, improves the utilization rate of exhaust gas, increases to from the first turbine
After the EGR exhaust pressurization taken out before depressor 8, first mixes EGR exhaust with fresh air, enter back into the first turbocharger 8
Compressor 802 is pressurized, and is helped to promote EGR exhaust pressure and is entered the exhausted air quantity of engine, without increasing air inlet section
Stream valve can promote EGR rate, to avoid pumping loss, 1 oil consumption rising of engine, particulate matter row while improving EGR rate
Put increase and so on, improve 1 economy of engine, in addition to this, due in above system egr system not by air inlet
The influence of pressurization, so that the first turbocharger 8 can be horizontal to obtain preferable oil consumption with the higher compressor of matching efficiency,
Simultaneously because the promotion of air inlet, can promote delivery temperature, the heat management of after-treatment system is obviously improved, after improving
The transformation efficiency of processing system.
Preferably, between the turbine 801 of the first turbocharger 8 and the turbine 601 of the second turbocharger 6
Pipeline be connected to exhaust pipe 11 by bypass pipe 10, exhaust gas control valve 7 is provided on bypass pipe 10, when in use, works as EGR rate
When inadequate, exhaust gas control valve 7 is closed, the exhaust gas that the turbine 801 of the first turbocharger 8 is discharged enters the second turbocharger
6 turbine 601 pressurizes to EGR exhaust, and when EGR rate is enough, exhaust gas control valve 7 is opened, and exhaust gas is expelled directly out, without
The turbine 601 of the second turbocharger 6 is crossed, to reduce exhaust resistance.
Bypass pipe 10 can be connected to exhaust pipe 11, can also be directly connected to external environment.
It, can be in the compressor 602 of the second turbocharger 6 and row since exhaust gas temperature is higher and contains particulate matter
EGR between gas manifold 3, which takes, is arranged filter and/or the first cooler for recycled exhaust gas 5, further, above-mentioned filter on tracheae 4
It can be set in other positions, EGR exhaust be filtered before EGR exhaust is mixed with fresh air, the first EGR is cooling
Device 5 not be it is necessary, can be set can also be not provided with.
Preferably, between the compressor 602 of the second turbocharger 6 and the compressor 802 of the first turbocharger 8
EGR air inlet pipe 12 on be provided with EGR valve 14, by adjusting the aperture of EGR valve 14, can control EGR exhaust amount, reach control
The purpose of EGR rate.
Further, the second cooler for recycled exhaust gas 13 is additionally provided in EGR air inlet pipe 12, in EGR exhaust and fresh air
EGR exhaust is cooled down before mixing, so that the two temperature is reached unanimity, to improve mixed effect.
Advanced optimize above-mentioned technical proposal, the second cooler for recycled exhaust gas 13 along exhaust gas flow direction be series at EGR valve 14 it
Afterwards, the exhaust gas for flowing through the second cooler for recycled exhaust gas 13 in this way is after the throttling of EGR valve 14, it is ensured that passes through the second cooler for recycled exhaust gas
13 EGR exhaust is all used to mix with air inlet, guarantees the efficiency of the second cooler for recycled exhaust gas 13.
It is understood that gas recirculation system is used as air inlet after mixing exhaust gas with fresh air, temperature is higher, if
1 intake air temperature of engine is higher, be easy to cause the imperfect combustion of fuel, influences 1 ability to work of engine, for this purpose, the first whirlpool
It takes turns and is additionally provided with intercooler 15 on the pipeline between 1 inlet manifold 2 of outlet and engine of the compressor 802 of booster 8, be used for
To cooling mixed admission, guarantee that 1 intake air temperature of engine is in zone of reasonableness.
The embodiment of the present invention is described further with reference to the accompanying drawing.
Embodiment one
Referring to Fig. 2, being parallel with exhaust pipe and EGR line after 1 exhaust manifold 3 of engine, wherein exhaust pipe is used
In recycling exhaust energy, air inlet is pressurized, EGR line is used to send portion back to 1 air inlet pipe of engine 9 tunnel, specifically
Ground, exhaust pipe include the turbine 801 of the first turbocharger 8 and the turbine 601 of the second turbocharger 6, and first
The entrance of the turbine 801 of turbocharger 8 is connected to exhaust manifold 3, the outlet of the turbine 801 of the first turbocharger 8
It is connected to the entrance of the turbine 601 of the second turbocharger 6, the outlet of the turbine 601 of the second turbocharger 6 is connected with
Exhaust pipe 11；EGR line includes the compressor 802 of the first turbocharger 8 and the compressor 602 of the second turbocharger 6,
The entrance of the compressor 602 of second turbocharger 6 is connected to exhaust manifold 3, the compressor 602 of the second turbocharger 6
Outlet is connected to the entrance of the compressor 802 of the first turbocharger 8 with air inlet pipe 9 together, and the first turbocharger 8 is calmed the anger
The outlet of machine 802 connects inlet manifold 2.
In said structure, 1 exhaust gas of engine is divided into two parts, and a part of exhaust gas initially enters the first turbocharger 8
Turbine 801 to plenum, subsequently enter another portion of the turbine 601 to 1 exhaust gas of engine of the second turbocharger 6
Divide and pressurize, the portion after pressurization is mixed in the upstream of the compressor 802 of the first turbocharger 8 with fresh air
It is pressurized afterwards as air inlet by the compressor 802 of the first turbocharger 8.
Embodiment two
Referring to Fig. 3, embodiment shown in Fig. 3 be embodiment shown in Fig. 2 on the basis of, increase a bypass pipe
10, one end of bypass pipe 10 is connected to the turbine 801 of the first turbocharger 8 and the turbine 601 of the second turbocharger 6
Between connecting pipeline on, the other end is connected to exhaust pipe 11, and exhaust gas control valve 7 is provided on bypass pipe 10, passes through setting
Above-mentioned bypass pipe 10 and exhaust gas control valve 7 can provide mostly a kind of selection for user, i.e., in EGR rate deficiency, can close useless
Gas control valve 7, make exhaust gas on exhaust pipe enter the turbine 601 of the second turbocharger 6 to the exhaust gas on EGR line into
Row pressurization, increase EGR exhaust, if EGR rate is enough, can close exhaust gas control valve 7, make in exhaust pipe to promote EGR rate
Exhaust gas be expelled directly out without the turbine 601 of the second turbocharger 6, reduce exhaust resistance.
Embodiment three
Referring to Fig. 4, embodiment illustrated in fig. 4 is on the basis of Fig. 3 embodiment, in calming the anger for the second turbocharger 6
EGR between the entrance and exhaust manifold 3 of machine 602, which takes, increases by the first cooler for recycled exhaust gas 5 on tracheae 4, it is to be understood that exhaust gas
Temperature is higher, and the first cooler for recycled exhaust gas 5 of setting can reach unanimity its low temperature with fresh air temperature with more
Good mixing, avoids 1 intake air temperature of engine excessively high.
Certainly, in other embodiments, between the entrance and exhaust manifold 3 of the compressor 602 of the second turbocharger 6
Filter can also be set on the position of first cooler for recycled exhaust gas 5 of embodiment illustrated in fig. 5, to filter the particle in exhaust gas, prevented
Particle enters engine 1, alternatively, can on the position simultaneously in-line filter and the first cooler for recycled exhaust gas 5, filter
Be not necessarily intended to be set to EGR and take tracheae 4, can also be set in EGR air inlet pipe 12, with before it is mixed with fresh air to it
It is filtered.
Example IV
Referring to Fig. 5, Fig. 5 be embodiment shown in Fig. 4 on the basis of, in the compressor 602 of the second turbocharger 6
EGR valve 14 is set in the EGR air inlet pipe 12 between the compressor 802 of the first turbocharger 8, and user can be by adjusting EGR
The aperture of valve 14 adjusts EGR rate, so that the EGR rate of the gas recirculation system is controllable.
Embodiment five
Referring to Fig. 6, from fig. 6 it can be seen that between exhaust manifold 3 and the compressor 602 of the second turbocharger 6
EGR, which takes, is not provided with the first cooler for recycled exhaust gas and filter on tracheae 4, in the case, can be in the pressure of the second turbocharger 6
EGR valve 14 is set on the EGR line between mechanism of qi 602 and the compressor 802 of the first turbocharger 8 and the 2nd EGR is cooling
Device 13 cools down to EGR exhaust using the second cooler for recycled exhaust gas 13.
Embodiment six
Referring to Fig. 7, in the embodiment shown in fig. 7, the turbine 801 of the first turbocharger 8 and the second turbine increase
It is connected with bypass pipe 10 between connecting pipeline and exhaust pipe 11 between the turbine 601 of depressor 6, is provided on bypass pipe 10 useless
Gas control valve 7, EGR take and are provided with the first cooler for recycled exhaust gas 5 on tracheae 4, are provided with EGR valve 14 and second in EGR air inlet pipe 12
Cooler for recycled exhaust gas 13 cools down EGR exhaust in EGR line twice, is allowed to level off to fresh air temperature as far as possible,
Guarantee mixed effect.
On the basis of the above embodiments, can also EGR take on tracheae 4 and/or EGR air inlet pipe 12 be arranged filter with
Filter the particle in EGR exhaust.
The gas recirculation system provided in based on the above embodiment, the present invention also provides a kind of engines 1, this starts
Machine 1 includes described in any item gas recirculation systems as above.Since the engine 1 uses the exhaust gas in above-described embodiment again
The circulatory system, so the beneficial effect of engine 1 please refers to above-described embodiment.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
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| CN201811619237.2A CN109667687A (en) | 2018-12-28 | 2018-12-28 | A kind of gas recirculation system and engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116181466A (en) * | 2023-03-22 | 2023-05-30 | 中国第一汽车股份有限公司 | Engine exhaust control system, method, vehicle and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5791146A (en) * | 1994-12-08 | 1998-08-11 | Scania Cv Ab | Arrangement for return of exhaust gases in supercharged engines with turbines in series |
| EP0718481B1 (en) * | 1994-12-24 | 2000-10-25 | MAN Nutzfahrzeuge Aktiengesellschaft | Exhaust gas recirculation deviced in a supercharged internal combustion engine |
| US20060124115A1 (en) * | 2003-11-17 | 2006-06-15 | Dennis Brookshire | Dual and hybrid EGR systems for use with turbocharged engine |
| CN106837615A (en) * | 2016-12-21 | 2017-06-13 | 东风商用车有限公司 | Multistage EGR turbocharging system |
-
2018
- 2018-12-28 CN CN201811619237.2A patent/CN109667687A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5791146A (en) * | 1994-12-08 | 1998-08-11 | Scania Cv Ab | Arrangement for return of exhaust gases in supercharged engines with turbines in series |
| EP0718481B1 (en) * | 1994-12-24 | 2000-10-25 | MAN Nutzfahrzeuge Aktiengesellschaft | Exhaust gas recirculation deviced in a supercharged internal combustion engine |
| US20060124115A1 (en) * | 2003-11-17 | 2006-06-15 | Dennis Brookshire | Dual and hybrid EGR systems for use with turbocharged engine |
| CN106837615A (en) * | 2016-12-21 | 2017-06-13 | 东风商用车有限公司 | Multistage EGR turbocharging system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116181466A (en) * | 2023-03-22 | 2023-05-30 | 中国第一汽车股份有限公司 | Engine exhaust control system, method, vehicle and storage medium |
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