CN106677934B - EGR and air intake coupling turbocharging system - Google Patents
EGR and air intake coupling turbocharging system Download PDFInfo
- Publication number
- CN106677934B CN106677934B CN201611193120.3A CN201611193120A CN106677934B CN 106677934 B CN106677934 B CN 106677934B CN 201611193120 A CN201611193120 A CN 201611193120A CN 106677934 B CN106677934 B CN 106677934B
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- egr
- air inlet
- turbine
- engine
- air
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- 230000008878 coupling Effects 0.000 title abstract description 5
- 238000010168 coupling process Methods 0.000 title abstract description 5
- 238000005859 coupling reaction Methods 0.000 title abstract description 5
- 238000002347 injection Methods 0.000 abstract description 17
- 239000007924 injection Substances 0.000 abstract description 17
- 238000002485 combustion reaction Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- 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
- F02B41/00—Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power
- F02B41/02—Engines with prolonged expansion
- F02B41/10—Engines with prolonged expansion in exhaust turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0077—Control of the EGR valve or actuator, e.g. duty cycle, closed loop control of position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
An EGR and air intake coupling turbocharging system comprises a turbocharger, an EGR air rail, an EGR nozzle and an engine, wherein an air compressor air outlet of the turbocharger is communicated with an air inlet channel of the engine, an EGR turbine air inlet of the EGR turbocharger is communicated with an exhaust pipe of the engine, an air outlet is communicated with an air inlet of a turbine, an EGR compressor air inlet of the EGR turbocharger is communicated with the exhaust pipe through a first exhaust pipe, and the air outlet is communicated with the air inlet channel of the engine sequentially through a second exhaust pipe, the EGR air rail and the EGR nozzle. The design not only improves the efficiency of the engine, but also realizes the accurate control of the direct injection EGR temperature.
Description
Technical field
The invention belongs to internal combustion engine EGR technology fields, and in particular to a kind of EGR couples turbo charge system with air inlet, fits
For improve EGR direct fuel-injection engines efficiency, realize direct-injection EGR temperature accurately control and the connection of air inlet and EGR supercharging levels
Close control.
Background technology
Currently, in face of increasingly severe environmental crisis, requirement of the various countries to emission regulation is increasingly stringenter, therefore the row of reduction
Put the Main way as internal combustion engine development.EGR is as reduction internal combustion engine NOxEffective emission controls by improving combustion measure and low of discharge
Discharge one of the important technology route of gas engine.
There are operating lag effects for traditional egr system, and excessive EGR rate is likely to occur in acceleration or loading procedure,
Cause emission to steeply rise, is incomplete combustion, unstable or even catch fire；Meanwhile when EGR rate is larger, a large amount of exhausts introduce
To air inlet pipe, exhaust and the mixed effect of fresh charge are deteriorated, and cause EGR mixing and each cylinder EGR distribution uneven, make part cylinder
Concentration of emission is excessively high and combustion instability, discharge and performance to engine have an adverse effect.And EGR direct-injection systems can have
The problems such as effect solves egr system delay, EGR amount accurately controls, is one of the developing direction of the following EGR strategies.
Chinese patent：Authorization Notice No. is CN205330831U, and authorized announcement date is the utility model on June 22nd, 2016
Patent discloses a kind of internal combustion engine EGR direct-injection systems, including high pressure EGR tube, and high pressure EGR tube one end is connected with exhaust main,
The other end is connected by EGR gas rail connecting tubes with EGR gas rail imports, and the outlet of EGR gas rails passes through EGR supply pipes and EGR nozzles
It is connected, EGR nozzles are mounted in the air intake duct on cylinder or close to cylinder.Although the system can realize the quick sound of EGR
It answers, but turbo-charged mode therein, only with plenum, the pressure in EGR gas rails is then maintained by EGR pumps, therefore needs
EGR pump operatings are driven by outside energy, with upper type so that the capacity usage ratio of engine is relatively low, started to affect
The efficiency of machine.
Invention content
The purpose of the present invention is overcoming the problems, such as that engine efficiency of the existing technology is low, providing one kind can effectively carry
High EGR direct fuel-injection engines efficiency and the EGR turbo charge systems jointly controlled for realizing air inlet and EGR supercharging levels.
In order to achieve the above object, technical scheme is as follows：
A kind of EGR couples turbo charge system, including turbocharger, EGR gas rail, EGR nozzles, engine with air inlet,
The turbocharger includes coaxially connected turbine, compressor, the air inlet of the turbine and the exhaust pipe of engine
Communicate, the exhaust outlet of the compressor is communicated with the air intake duct of engine, the exhaust outlet of the EGR gas rail by EGR nozzles with
The air intake duct of engine communicates；
The system also includes EGR turbocharger, the EGR turbocharger include coaxially connected EGR turbines,
The air inlet of EGR compressors, the EGR turbines is communicated with exhaust pipe, the exhaust outlet of EGR turbines and the air inlet of turbine
It communicates, the air inlet of the EGR compressors is communicated by No.1 exhaust pipe with exhaust pipe, and the exhaust outlet of EGR compressors passes through two
Number exhaust pipe is communicated with the air inlet of EGR gas rails.
Charge air cooler charge air cooler, pressure after is respectively arranged with before pressing on the No.1 exhaust pipe, No. two exhaust pipes.
The system also includes turbine by-pass pipe, it is provided with turbine bypass valve on the turbine by-pass pipe, the turbine by-pass
The air inlet of valve is communicated with exhaust pipe, and the exhaust outlet of turbine bypass valve is communicated with the air inlet of turbine, and on No.1 exhaust pipe
EGR shut-off valves are additionally provided with, the exhaust outlet of the EGR shut-off valves is communicated with the air inlet of charge air cooler before pressure.
The compressor is communicated by air intake intercooler with the air intake duct of engine.
Compared with prior art, beneficial effects of the present invention are：
1, it includes EGR turbocharger that a kind of EGR of the present invention, which couples turbo charge system with air inlet, EGR turbines therein
Air inlet, the exhaust outlet of machine are communicated with the air inlet of exhaust pipe, turbine respectively, and the air inlet of EGR compressors is arranged by No.1
Tracheae is communicated with exhaust pipe, and exhaust outlet is communicated by No. two exhaust pipes with the air inlet of EGR gas rails, i.e., in conventional gas introduction supercharging
Basis has coupled EGR superchargings, and when system operates, the exhaust gas being discharged by the exhaust pipe of engine is divided into two parts, a part of conduct
Driving source enters EGR turbines and provides driving force for EGR turbocharger, goes successively to turbine later, to drive compressor
Air inlet is pressurized, another part then flows into EGR compressors, EGR gas rails is entered after EGR compressor pressures, and maintain EGR
Pressure in gas rail is sprayed finally by EGR nozzles, which is pressurized air inlet and EGR using engine exhaust energy,
Without external force, the EGR common rail systems for establishing a pressure stability while plenum can not only be being realized, be EGR
Direct-injection provides advantage, and improves the capacity usage ratio of engine, to improve engine efficiency.Therefore, this hair
It is bright to not only contribute to EGR direct-injections, and improve engine efficiency.
2, a kind of EGR of the present invention is coupled with air inlet in turbo charge system is arranged between compressor and the air intake duct of engine
There is air intake intercooler, charge air cooler after pressure preceding charge air cooler, pressure is respectively arranged on No.1 exhaust pipe, No. two exhaust pipes, passes through adjusting
The amount of cooling water of air intake intercooler can control intake air temperature after supercharging, and then control and enter fresh charge temperature in cylinder, optimize cylinder
Interior burning simultaneously controls discharge, adjusts the controllable EGR temperature into compressor of amount of cooling water of charge air cooler before pressure, avoids because of EGR temperature
Spending height causes compressor to damage, and adjusts the EGR temperature in the controllable EGR gas rails of amount of cooling water of charge air cooler after pressing, and maintain EGR
The stabilization of EGR temperature in gas rail, to realize accurately controlling for direct-injection EGR temperature.Therefore, the present invention can not only be protected and be calmed the anger
Machine, and accurately control the temperature of direct-injection EGR.
3, a kind of EGR of the present invention couples turbo charge system with air inlet and is parallel with the whirlpool with turbine bypass valve on turbine
Bypass pipe is taken turns, and is provided with the EGR shut-off valves communicated with the preceding charge air cooler air inlet of pressure on No.1 exhaust pipe, by turbine by-pass
The adjusting of valve and EGR shut-off valves can not only control EGR supercharging levels（EGR gas rail rail pressures）, and air inlet and EGR may be implemented
Coupling direct-injection is switched fast with simple plenum state.Therefore, control, the air inlet to EGR supercharging levels can be achieved in the present invention
With being switched fast for EGR coupling direct-injection and simple plenum state.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
In figure：
Turbocharger 1, turbine 11, compressor 12, EGR turbocharger 2, EGR turbines 21, EGR compressors 22,
In before EGR gas rail 3, EGR nozzles 4, engine 5, exhaust pipe 51, No.1 exhaust pipe 6,61, No. two exhaust pipes 7 of EGR shut-off valves, pressure
Charge air cooler 9, turbine by-pass pipe 10, turbine bypass valve 101, air intake intercooler 20 after cooler 8, pressure；
Arrow direction is airflow direction.
Specific implementation mode
The present invention is described in further detail with specific implementation mode for explanation below in conjunction with the accompanying drawings.
Referring to Fig. 1, a kind of EGR couples turbo charge system, including turbocharger 1, EGR gas rail 3, EGR spray with air inlet
Mouth 4, engine 5, the turbocharger 1 include coaxially connected turbine 11, compressor 12, the air inlet of the turbine 11
Mouth is communicated with the exhaust pipe 51 of engine 5, and the exhaust outlet of the compressor 12 is communicated with the air intake duct of engine 5, the EGR gas
The exhaust outlet of rail 3 is communicated by EGR nozzles 4 with the air intake duct of engine 5；
The system also includes EGR turbocharger 2, which includes coaxially connected EGR turbines
21, the air inlet of EGR compressors 22, the EGR turbines 21 is communicated with exhaust pipe 51, the exhaust outlet of EGR turbines 21 and whirlpool
The air inlet of turbine 11 communicates, and the air inlet of the EGR compressors 22 is communicated by No.1 exhaust pipe 6 with exhaust pipe 51, EGR pressures
The exhaust outlet of mechanism of qi 22 is communicated by No. two exhaust pipes 7 with the air inlet of EGR gas rail 3.
Charge air cooler 8 before pressing, charge air cooler 9 after pressure are respectively arranged on 6, No. two exhaust pipes 7 of the No.1 exhaust pipe.
The system also includes turbine by-pass pipe 10, it is provided with turbine bypass valve 101 on the turbine by-pass pipe 10, the whirlpool
The air inlet of wheel by-passing valve 101 is communicated with exhaust pipe 51, the exhaust outlet of turbine bypass valve 101 and the air inlet phase of turbine 11
It is logical, and EGR shut-off valves 61 are additionally provided on No.1 exhaust pipe 6, the exhaust outlet of the EGR shut-off valves 61 with before pressure charge air cooler 8 into
Gas port communicates.
The compressor 12 is communicated by air intake intercooler 20 with the air intake duct of engine 5.
The principle of the present invention is described as follows：
EGR direct-injection systems are mainly accurately quick by the EGR with certain pressure in EGR gas rails by EGR Jet controls
It sprays, and EGR superchargings are the key that the premises established and maintained EGR gas rail pressure power, and realize EGR direct-injections.For this purpose, of the invention
Propose a kind of EGR based on turbocharging technology and air inlet coupling supercharging mode, and establish using exhaust energy to EGR and
The EGR that air inlet is pressurized couples turbo charge system with air inlet.The exhaust gas being discharged by engine is divided into two parts by the system,
It is that EGR turbocharger 2 provides driving force that a part of exhaust gas enters EGR turbines 21 as driving source, enters turbine later
11, to drive compressor 12 to be pressurized air inlet, the gas in-cylinder combustion that air inlet after supercharged then enters engine 5 does work；Separately
It is a part of then flow into EGR compressors 22, enter EGR gas rail 3 after the supercharging of EGR compressors 22, and maintain the pressure in EGR gas rail 3
Power is sprayed finally by EGR nozzles 4.The design is not only realizing that solving the driving that EGR is pressurized while plenum asks
Topic, while the utilization of exhaust energy can help to improve engine power utilization rate, improve engine efficiency.
Air inlet may be implemented by the switch-mode regulation to turbine bypass valve 101, EGR shut-off valves 61 by the present invention and EGR is coupled
Direct-injection is switched fast with simple plenum state, specially：
When turbine bypass valve 101 is closed, EGR shut-off valves 61 are opened, system enters EGR pressurized states, realizes normal EGR
Direct-injection function；
When turbine bypass valve 101 is opened, EGR shut-off valves 61 are closed, EGR turbines 21 are bypassed, from engine
Exhaust gas is discharged by turbine by-pass pipe 10 in turbine 11, and EGR direct-injection functions are closed, and system enters simple plenum state.
Embodiment 1：
Referring to Fig. 1, a kind of EGR couples turbo charge system with air inlet, including turbocharger 1, EGR turbocharger 2,
EGR gas rail 3, EGR nozzles 4, engine 5, turbine by-pass pipe 10, the turbocharger 1 include coaxially connected turbine 11,
Compressor 12, EGR turbocharger 2 include coaxially connected EGR turbines 21, EGR compressors 22, the row of the compressor 12
Gas port is communicated by air intake intercooler 20 with the air intake duct of engine 5, air inlet and 51 phase of exhaust pipe of the EGR turbines 21
Logical, the exhaust outlet of EGR turbines 21 is communicated with the air inlet of turbine 11, and the air inlet of the EGR compressors 22 passes through No.1
Exhaust pipe 6 is communicated with exhaust pipe 51, and the exhaust outlet of EGR compressors 22 passes sequentially through No. two exhaust pipes 7, EGR gas rail 3, EGR nozzles
4 communicate with the air intake duct of engine 5, and charge air cooler 8 before EGR shut-off valves 61, pressure is provided on the No.1 exhaust pipe 6, which cuts
Only the exhaust outlet of valve 61 is communicated with the air inlet of charge air cooler 8 before pressure, and charge air cooler 9 after pressure, institute are provided on No. two exhaust pipes 7
It states and is provided with turbine bypass valve 101 on turbine by-pass pipe 10, the air inlet of the turbine bypass valve 101 is communicated with exhaust pipe 51, whirlpool
The exhaust outlet of wheel by-passing valve 101 is communicated with the air inlet of turbine 11.
Claims (4)
1. a kind of EGR couples turbo charge system, including turbocharger with air inlet（1）, EGR gas rails（3）, EGR nozzles（4）、
Engine（5）, the turbocharger（1）Including coaxially connected turbine（11）, compressor（12）, the turbine（11）
Air inlet and engine（5）Exhaust pipe（51）It communicates, the compressor（12）Exhaust outlet and engine（5）Air intake duct
It communicates, the EGR gas rail（3）Exhaust outlet pass through EGR nozzles（4）With engine（5）Air intake duct communicate, it is characterised in that：
The system also includes EGR turbochargers（2）, the EGR turbocharger（2）Including coaxially connected EGR turbines
（21）, EGR compressors（22）, the EGR turbines（21）Air inlet and exhaust pipe（51）It communicates, EGR turbines（21）'s
Exhaust outlet and turbine（11）Air inlet communicate, the EGR compressors（22）Air inlet pass through No.1 exhaust pipe（6）With row
Tracheae（51）It communicates, EGR compressors（22）Exhaust outlet pass through No. two exhaust pipes（7）With EGR gas rails（3）Air inlet communicate；
The system also includes turbine by-pass pipes（10）, the turbine by-pass pipe（10）On be provided with turbine bypass valve（101）, should
Turbine bypass valve（101）Air inlet and exhaust pipe（51）It communicates, turbine bypass valve（101）Exhaust outlet and turbine（11）'s
Air inlet communicates, and No.1 exhaust pipe（6）On be additionally provided with EGR shut-off valves（61）, the EGR shut-off valves（61）Exhaust outlet with
EGR compressors（22）Air inlet communicate.
2. a kind of EGR according to claim 1 couples turbo charge system with air inlet, it is characterised in that：The No.1 row
Tracheae（6）, No. two exhaust pipes（7）On be respectively arranged with pressure before charge air cooler（8）, charge air cooler after pressure（9）.
3. a kind of EGR according to claim 2 couples turbo charge system with air inlet, it is characterised in that：The EGR cut-offs
Valve（61）Exhaust outlet with pressure before charge air cooler（8）Air inlet communicate.
4. a kind of EGR according to claim 1 or 2 couples turbo charge system with air inlet, it is characterised in that：It is described to calm the anger
Machine（12）Pass through air intake intercooler（20）With engine（5）Air intake duct communicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611193120.3A CN106677934B (en) | 2016-12-21 | 2016-12-21 | EGR and air intake coupling turbocharging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611193120.3A CN106677934B (en) | 2016-12-21 | 2016-12-21 | EGR and air intake coupling turbocharging system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106677934A CN106677934A (en) | 2017-05-17 |
| CN106677934B true CN106677934B (en) | 2018-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611193120.3A Active CN106677934B (en) | 2016-12-21 | 2016-12-21 | EGR and air intake coupling turbocharging system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523878B (en) * | 2020-11-10 | 2021-11-09 | 东风汽车集团有限公司 | EGR valve closed-loop control method based on EGR rate |
Citations (5)
| 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 |
| DE4231218C2 (en) * | 1992-09-18 | 1999-03-18 | Daimler Benz Ag | Exhaust gas recirculation |
| US6145313A (en) * | 1997-03-03 | 2000-11-14 | Allied Signal Inc. | Turbocharger incorporating an integral pump for exhaust gas recirculation |
| US6205785B1 (en) * | 1999-07-21 | 2001-03-27 | Caterpillar Inc. | Exhaust gas recirculation system |
| CN205330831U (en) * | 2016-02-05 | 2016-06-22 | 东风商用车有限公司 | EGR direct injection system of internal combustion engine |
-
2016
- 2016-12-21 CN CN201611193120.3A patent/CN106677934B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4231218C2 (en) * | 1992-09-18 | 1999-03-18 | Daimler Benz Ag | Exhaust gas recirculation |
| US5791146A (en) * | 1994-12-08 | 1998-08-11 | Scania Cv Ab | Arrangement for return of exhaust gases in supercharged engines with turbines in series |
| US6145313A (en) * | 1997-03-03 | 2000-11-14 | Allied Signal Inc. | Turbocharger incorporating an integral pump for exhaust gas recirculation |
| US6205785B1 (en) * | 1999-07-21 | 2001-03-27 | Caterpillar Inc. | Exhaust gas recirculation system |
| CN205330831U (en) * | 2016-02-05 | 2016-06-22 | 东风商用车有限公司 | EGR direct injection system of internal combustion engine |
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| Publication number | Publication date |
|---|---|
| CN106677934A (en) | 2017-05-17 |
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