CN107060989B - Three stage of the three turbocharger sequential turbocharging device and its control method of function are realized with EGR - Google Patents
Three stage of the three turbocharger sequential turbocharging device and its control method of function are realized with EGR Download PDFInfo
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- CN107060989B CN107060989B CN201710204422.4A CN201710204422A CN107060989B CN 107060989 B CN107060989 B CN 107060989B CN 201710204422 A CN201710204422 A CN 201710204422A CN 107060989 B CN107060989 B CN 107060989B
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 96
- 238000001816 cooling Methods 0.000 claims description 5
- 239000002912 waste gas Substances 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 7
- 230000004044 response Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Supercharger (AREA)
Abstract
本发明的目的在于提供具有EGR实现功能的三涡轮增压器三阶段相继涡轮增压装置及其控制方法,包括排气集管、进气集管、1号大涡轮增压器、2号大涡轮增压器、小涡轮增压器，1号涡轮的进口端连通排气集管，2号涡轮的进口端连通排气集管，小号涡轮的进口端连通排气集管，1号涡轮的出口端、2号涡轮的出口端、小涡轮的出口端均连通排放总管；1号压气机、2号压气机、小压气机的进口端均连通进气总管，1号压气机的出口端连通出气总管，2号压气机的出口端连通出气总管，小压气机的出口端连通出气总管；本发明既能起到相继增压改善柴油机低工况性能的作用，又能通过EGR满足柴油机在排放控制区的NOx排放要求，能够大大提高柴油机的综合性能。
The purpose of the present invention is to provide a three-stage turbocharger with three-stage turbocharger with EGR realization function and a control method thereof, including an exhaust manifold, an intake manifold, a No. 1 large turbocharger, a No. 2 large turbocharger Turbocharger, small turbocharger, the inlet end of the No. 1 turbine is connected to the exhaust manifold, the inlet end of the No. 2 turbine is connected to the exhaust manifold, the inlet end of the small turbine is connected to the exhaust manifold, and the No. 1 turbine is connected to the exhaust manifold. The outlet end of the No. 2 turbine and the outlet end of the small turbine are all connected to the discharge manifold; the inlet ends of the No. 1 compressor, the No. 2 compressor and the small compressor are all connected to the intake manifold, and the outlet end of the No. 1 compressor The outlet end of the No. 2 compressor is communicated with the outlet header pipe, and the outlet end of the small compressor is communicated with the outlet header pipe; the present invention can not only play the role of successively supercharging and improving the performance of the diesel engine under low working conditions, but also meet the requirements of the diesel engine at low operating conditions through EGR. The NOx emission requirements in the emission control area can greatly improve the comprehensive performance of the diesel engine.
Description
Technical field
The present invention relates to a kind of diesel exhaust utilize device and its control method, specifically EGR device and
Its control method.
Background technique
Traditional turbocharging technology can greatly improve the mean effective pressure of diesel engine, but can bring simultaneously certain
The problem of, when diesel engine operates in low operating condition, exhaust energy is lower, and efficiency of turbocharger and boost pressure, which are substantially reduced, to be caused to supply
Tolerance is insufficient, and in-cylinder combustion is bad, and fuel consumption rate increases, and excessive discharge temperature and emission performance deteriorate, if selected increasing
Depressor selection is too small, and when diesel engine operates in high operating condition, boost pressure and supercharger speed all can be excessively high, influence diesel engine
With the service life of turbocharger, consecutive pressurization system uses two or more turbocharger, with engine with supercharger
The growth of revolving speed and load, puts into operation in order in succession, to enable turbo-charged diesel in entire operation range
There are higher pressure ratio and preferable economy, meet the air requirements of different operating condition diesel engines, the sequential pressurizing stage is more, cuts
Change it is more steady, work it is more stable.In recent years, diesel engine by its thermal efficiency, economy, in terms of advantage by
Concern, although the use of diesel engine is greatly promoted the development and progress of society, it also brings along in use
The a series of problem such as environmental pollution, wherein NOx is one of main noxious pollutant, and greatly danger can be generated to human body
Evil, corresponding emission regulation has been formulated in countries in the world one after another, for marine diesel, in emission control area requirement NOx
Being emitted on original basis is reducing by 70%, and EGR technology is that exhaust gas a part of in diesel exhaust gas is introduced into air inlet pipe,
It participates in burning again with cylinder is entered after fresh air mixing, reduces air inlet oxygen content and ignition temperature, and then can reduce
Diesel NOx discharges and meets emission request.
Summary of the invention
The purpose of the present invention is to provide be able to achieve sequential turbocharging and discharge of the diesel engine in non-emission control area
Three stage of the three turbocharger sequential turbocharging that function is realized with EGR of the sequential turbocharging joint EGR of control zone
Device and its control method.
The object of the present invention is achieved like this:
Three stage of the three turbocharger sequential turbocharging device that there is the present invention EGR to realize function, it is characterized in that: packet
Exhaust header, inlet manifold, No. 1 big turbocharger, No. 2 big turbocharger, small turbocharger are included, No. 1 big turbine increases
Depressor includes No. 1 compressor, No. 1 turbine, and No. 2 big turbocharger includes No. 2 compressors, No. 2 turbines, small turbocharger packet
Include small compressor, small turbine；The input end of No. 1 turbine is connected to exhaust header by No. 1 exhaust pipe, and the input end of No. 2 turbines is logical
Cross No. 2 exhaust pipes connection exhaust headers, the input end of small size turbine passes through small size exhaust pipe and is connected to exhaust header, No. 1 turbine
Outlet end, the outlet end of No. 2 turbines, small turbine outlet end be connected to discharge manifold, delivery pipe is connected to atmosphere；No. 1 compressor,
No. 2 compressors, small compressor input end be connected to inlet manifold, inlet manifold one end is connected to atmosphere, and the other end is connected to EGR
Pipe, EGR pipe are connected to discharge manifold, and the outlet end of No. 1 compressor is connected to outlet general pipeline by No. 1 escape pipe, and No. 2 compressors go out
Mouth end is connected to outlet general pipeline by No. 2 escape pipes, and the outlet end of small compressor passes through small size escape pipe connection outlet general pipeline, outlet
General pipeline is connected to inlet manifold by air inlet communicating pipe；No. 1 gas valve is installed, No. 2 combustions of installation on No. 2 exhaust pipes on No. 1 exhaust pipe
Air valve installs No. 3 gas valves on small size exhaust pipe, No. 1 air cutoff valve is installed on No. 1 escape pipe, installs 2 on No. 2 escape pipes
Number air cutoff valve installs EGR valve on small size escape pipe.
The present invention have EGR realize function three stage of three turbocharger sequential turbocharging device can also include:
1, small compressor air control valve is installed on the inlet manifold between No. 2 compressors and small compressor, is pacified in EGR pipe
Cooler for recycled exhaust gas, EGR washer, small compressor exhaust gas control valve are filled, air inlet installs aerial cooler on communicating pipe.
Three stage of the three turbocharger sequential turbocharging control method that there is the present invention EGR to realize function, feature
It is:
When diesel engine operates in non-emission control area:
Small compressor air control valve is opened, and small compressor exhaust gas control valve is closed, and EGR washer and cooler for recycled exhaust gas are not
Participate in work；
(1) when diesel engine is in low operating condition: close No. 1 gas shutoff valve, No. 2 gas shutoff valves, No. 1 air valve and
No. 2 air valves open No. 3 gas control valves and standard-sized sheet EGR valve；
(2) when diesel engine operates in medium-heavy duty: opening No. 2 gas valves and No. 2 on the basis of diesel engine low operating condition
Air valve makes No. 2 big turbocharger start to devote oneself to work, at this time No. 2 big turbocharger and small turbocharger while work
Make；
(3) when diesel engine operates in high operating condition: opened on the basis of diesel engine medium-heavy duty No. 1 air cutoff valve and
No. 1 gas shutoff valve, three turbocharger work at the same time at this time.
When diesel engine operates in emission control area:
(a) when diesel engine is in low condition range: closing No. 1 gas shutoff valve, No. 2 gas shutoff valves, No. 1 air
Shut-off valve, No. 2 air cutoff valves and small compressor exhaust gas control valve open No. 3 gas control valves, the control of small compressor air
Valve and standard-sized sheet EGR valve,；
(b) when diesel engine operates in medium-heavy duty: opening No. 3 gas valves, No. 2 gas valves, No. 2 air valves, small calm the anger
Machine exhaust gas control valve, EGR valve simultaneously close off small compressor air control valve, and EGR washer and cooler for recycled exhaust gas are started to work, this
When No. 2 big turbocharger and small turbocharger work at the same time, No. 2 compressor inlets connect atmosphere, and small compressor inlet connects
Connect exhaust gas washed and after cooling；
(c) when diesel engine operates in high operating condition: opening No. 1 gas shutoff valve, No. 1 air cutoff valve, No. 2 gas valves, 2
Number air valve, No. 3 gas valves, small compressor exhaust gas control valve, EGR valve, simultaneously close off small compressor air control valve, EGR is washed
It washs device and cooler for recycled exhaust gas is started to work, three turbocharger work at the same time at this time, No. 1 compressor, No. 2 compressor inlet connections
Atmosphere, small compressor inlet connect washed and after cooling exhaust gas.
Present invention has an advantage that the present invention can be realized by two big turbocharger and one small turbocharger
Diesel engine non-emission control region three stage adjustable consecutives be pressurized, solve diesel engine in low operating condition due to exhaust energy not
Foot, turbocharger are sluggish serious, and cylinder intake air quantity caused by turbine efficiency is lower is insufficient, and burning deteriorates, fuel consumption rate compared with
The problems such as high, for three stage sequential turbochargings are with respect to two stages sequential turbocharging, works more stable, transition effect is more
Ideal can take into account overall performance.Simultaneously EGR can also be realized on the basis of three stage sequential pressurizings in emission control area,
The oxygen content and maximum combustion temperature of air inlet are reduced, and then reduces the NOx emission of diesel engine, to meet emission control area
Emission request, small size turbocharger air compressor compression is not air but the exhaust gas after turbine at this time, does not need additionally to borrow
It helps EGR blower that can overcome the pressure difference between diesel engine intake and exhaust, improves Diesel Engine Complete Machine efficiency, the EGR rate of diesel engine
It is that adjustable range is larger to may be implemented diesel engine difference work by being adjusted by the EGR valve after small turbocharger air compressor
The Optimum EGR rate of condition.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is flow chart of the invention.
Specific embodiment
It illustrates with reference to the accompanying drawing and the present invention is described in more detail:
In conjunction with Fig. 1-2, three stage of the three turbocharger sequential turbocharging disclosed by the invention that function is realized with EGR
Device specifically includes that exhaust header 1, inlet manifold 2,5, No. 2 gas valves 6 of the gas valve of gas valve 4,1 of diesel engine 3,3, small
Turbocharger air compressor exhaust gas control valve 7, EGR washer 8, cooler for recycled exhaust gas 9, the control of small turbocharger air compressor air
11, No. 1 big turbocharger turbine 12, the 2 big turbocharger air compressors 13,2 of valve 10,1 big turbocharger air compressors
Number big turbocharger turbine 14, small turbocharger air compressor 15,16, No. 1 air cutoff valves 17 of small turbocharger turbine,
No. 2 air cutoff valves 18, EGR valve 19, aerial cooler 20 and it is relatively large in diameter exhaust pipe 21.Each cylinder of diesel engine leads to respectively
Exhaust branch pipe connection exhaust header 1 is crossed, inlet manifold 2 is connected by air intake branch；Exhaust gas difference after 1 pressure stabilizing of exhaust header
Lead to No. 1 big turbocharger, No. 2 big turbines by No. 1 gas shutoff valve 4 of gas shutoff valve 6,3 of gas shutoff valve 5,2
The entrance of booster and small turbocharger turbine 12,14,16, the exhaust gas come out from turbocharger turbine 12,14,16 are logical
Cross a 21 directly row Xiang great Qi being relatively large in diameter；No. 1 big turbocharger air compressor 11 and No. 2 big turbocharger are calmed the anger
13 entrance of machine is directly connected to atmosphere, and small size 15 entrance of turbocharger air compressor can both be directly connected to atmosphere or can connect useless
The exhaust gas of air pipe end, wherein they are calmed the anger by small turbocharger air compressor air shut-off valve 10 and small turbocharger
Machine exhaust gas control valve 7 controls, and is equipped with small turbocharger on the pipeline of small 15 entrance of turbocharger air compressor connection atmosphere
Compressor air control valve 10 is installed on the EGR line between 21 end of small turbocharger air compressor entrance and exhaust pipe
There are small turbocharger air compressor exhaust gas control valve 7, EGR washer 8 and cooler for recycled exhaust gas 9；No. 1 big turbocharger, No. 2
The blower outlet of big turbocharger pressure and small turbocharger passes through 17, No. 2 air cutoff valves of No. 1 air cutoff valve respectively
18 and EGR valve 19 connect 20 entrance of aerial cooler, and from aerial cooler 20 come out fresh air be directly communicated to air inlet
Collector 3 participates in burning into cylinder, and the EGR rate of diesel engine difference operating condition is to adjust the aperture of EGR valve 19 by closed loop to realize
's.
The specific control program of the device is as follows:
When diesel engine operates in non-emission control area
Small turbocharger air compressor air shut-off valve 10 is opened, and small turbocharger air compressor exhaust gas control valve 7 is closed,
EGR washer 8 and cooler for recycled exhaust gas 9 are not involved in work, and diesel engine is in pure phase after boost mode at this time.
(1) when diesel engine is in low operating condition: closing No. 1 air valve 17 of gas shutoff valve 6,1 of gas shutoff valve 5,2
And No. 2 air valves 18, No. 3 gas control valves 4 and standard-sized sheet EGR valve 19 are opened, at this time only small turbocharger operation, turbine
Circulation area is smaller, and response is fast, and turbine efficiency is high, and acting ability is strong, can generate higher pressure ratio and flow, improve low operating condition
Acceleration and load response characteristic.
(2) when diesel engine operates in medium-heavy duty: No. 2 gas valve 6 and No. 2 air valves 18 are opened on the basis of (1),
No. 2 big turbocharger is set to start to devote oneself to work, No. 2 big turbocharger and small turbocharger work at the same time at this time, turbine
Circulation area increases, and small turbo charger speed will not be made to transfinite, while pressure ratio will not be too high, and air mass flow increases, and meets
The air requirements of diesel engine medium-heavy duty.
(3) when diesel engine operates in high operating condition: air mass flow required for diesel engine works at this time increases, in (2)
On the basis of open No. 1 air cutoff valve 17 and No. 1 gas shutoff valve 5, three turbocharger work at the same time at this time, turbine circulation
Area is maximum, pressure ratio will not very high while total flow it is larger, meet the air requirements of the high operating condition of diesel engine.
When diesel engine operates in emission control area
(1) if diesel engine is in low condition range: NOx emission is relatively fewer, while mainly full under low operating condition
The air inflow problem of sufficient diesel engine, so when diesel engine is in low operating condition, without EGR, close at this time No. 1 gas shutoff valve 5,
No. 2 air cutoff valves 18 of air cutoff valve 17,2 of gas shutoff valve 6,1 and the control of small turbocharger air compressor exhaust gas
Valve 7 opens No. 3 gas control valves 4, small turbocharger air compressor air shut-off valve 10 and standard-sized sheet EGR valve 19, cooler for recycled exhaust gas
It does not work with EGR washer, at this moment only small turbocharger operation, turbine circulation area is smaller, and response is fast, turbine efficiency
Height, acting ability is strong, can generate higher pressure ratio and flow, improves the acceleration and load response characteristic of low operating condition, meets bavin
The air requirements of the low operating condition of oil machine.
(2) when diesel engine operates in medium-heavy duty, the gas valve 6,2 of No. 3 gas valves 4,2 air valve 18, small is opened
Turbocharger air compressor exhaust gas control valve 7, EGR valve 19 keep certain aperture, and it is empty to simultaneously close off small turbocharger air compressor
Gas control valve 10, at this moment EGR washer 8 and cooler for recycled exhaust gas 9 are started to work, No. 2 big turbocharger and small turbocharging at this time
Device works at the same time, and No. 2 13 entrances of big turbocharger air compressor connect atmosphere, small 15 entrance of turbocharger air compressor connection warp
Washing and exhaust gas after cooling will lead in this way into the specific heats of gases in inlet manifold 2 and holds increase, and oxygen content reduces, finally
Maximum combustion temperature is caused to reduce, NOx emission reduces, simultaneously because supercharged diesel engine excess air coefficient is larger, in exhaust gas
Containing a large amount of oxygen, so the useless internal oxygen content through too small turbocharger air compressor 15 is also higher not to will lead to air inlet collection
Gas oxygen content is very low in pipe 2 and then influences combustion quality.
(3) when diesel engine operates in high operating condition, the combustion gas of air cutoff valve 17,2 of No. 1 gas shutoff valve 5,1 is opened
The air valve 18,3 of valve 6,2 gas valve 4, small turbocharger air compressor exhaust gas control valve 7, EGR valve 19 keep certain aperture,
Small turbocharger air compressor air shut-off valve 10 is simultaneously closed off, at this moment EGR washer and cooler for recycled exhaust gas are started to work, at this time
Three turbocharger work at the same time, and 1, No. 2 big turbocharger air compressor 11,13 entrances connect atmosphere, small turbocharger pressure
15 entrance of mechanism of qi connects washed and after cooling exhaust gas, and total circulation area of turbine is maximum, and boost pressure will not be very high, simultaneously
Maximum flow meets air required for high operating condition is burnt, while being entered in inlet manifold 2 by small turbocharger air compressor
Exhaust gas can make the specific heats of gases in inlet manifold 2 hold increase, oxygen content reduce, eventually lead to maximum combustion temperature reduction, NOx
Discharge reduces, simultaneously because supercharged diesel engine excess air coefficient is very big, a large amount of oxygen is also contained in exhaust gas, so through too small
Oxygen content is also higher in the exhaust gas of turbocharger air compressor 15, not will lead in inlet manifold 2 gas oxygen content very it is low in turn
Influence combustion quality.
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| CN110486146A (en) * | 2017-08-29 | 2019-11-22 | 熵零技术逻辑工程院集团股份有限公司 | A kind of standby rotating turbine booster that flows back |
| CN111663994A (en) * | 2020-06-17 | 2020-09-15 | 中车大连机车研究所有限公司 | Control method of adjustable nozzle |
| CN112377280B (en) * | 2020-11-04 | 2023-05-05 | 哈尔滨工程大学 | Exhaust energy cascade utilization system of supercharged engine and utilization method thereof |
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| CN102444464A (en) * | 2011-11-03 | 2012-05-09 | 上海交通大学 | Twin-scroll single-pressure turbo system |
| CN103061868A (en) * | 2013-01-31 | 2013-04-24 | 长城汽车股份有限公司 | Three-turbine supercharging mechanism and corresponding turbo-supercharged engine |
| CN203560009U (en) * | 2013-09-29 | 2014-04-23 | 长城汽车股份有限公司 | Exhaust gas recirculation (EGR) system for two-stage supercharged engine |
| DE102015211229A1 (en) * | 2015-06-18 | 2016-12-22 | Ford Global Technologies, Llc | Exhaust-driven turbocharged internal combustion engine with partial shutdown and auxiliary compressor and method for operating such an internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8943823B2 (en) * | 2010-11-18 | 2015-02-03 | Caterpillar Inc. | Fluid handling system having dedicated EGR turbo-generator |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444464A (en) * | 2011-11-03 | 2012-05-09 | 上海交通大学 | Twin-scroll single-pressure turbo system |
| CN103061868A (en) * | 2013-01-31 | 2013-04-24 | 长城汽车股份有限公司 | Three-turbine supercharging mechanism and corresponding turbo-supercharged engine |
| CN203560009U (en) * | 2013-09-29 | 2014-04-23 | 长城汽车股份有限公司 | Exhaust gas recirculation (EGR) system for two-stage supercharged engine |
| DE102015211229A1 (en) * | 2015-06-18 | 2016-12-22 | Ford Global Technologies, Llc | Exhaust-driven turbocharged internal combustion engine with partial shutdown and auxiliary compressor and method for operating such an internal combustion engine |
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