CN107060989A - 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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- CN107060989A CN107060989A CN201710204422.4A CN201710204422A CN107060989A CN 107060989 A CN107060989 A CN 107060989A CN 201710204422 A CN201710204422 A CN 201710204422A CN 107060989 A CN107060989 A CN 107060989A
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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
- 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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- General Engineering & Computer Science (AREA)
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- Exhaust-Gas Circulating Devices (AREA)
Abstract
It is an object of the invention to provide three stage of the three turbocharger sequential turbocharging device and its control method that function is realized with EGR, including exhaust header, inlet manifold, No. 1 big turbocharger, No. 2 big turbocharger, small turbocharger, the entrance point connection exhaust header of No. 1 turbine, the entrance point connection exhaust header of No. 2 turbines, the entrance point connection exhaust header of small size turbine, the port of export of No. 1 turbine, the port of export, the port of export of small turbine of No. 2 turbines connect discharge manifold；No. 1 compressor, No. 2 compressors, the entrance points of small compressor connect inlet manifold, the port of export connection outlet house steward of No. 1 compressor, the port of export connection outlet house steward of No. 2 compressors, the port of export connection outlet house steward of small compressor；The present invention, which can play a part of sequential pressurizing, improves diesel engine low-load performance, can meet NOx emission requirement of the diesel engine in emission control area by EGR again, can greatly improve the combination property of 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 technology
Traditional turbocharging technology can greatly improve the mean effective pressure of diesel engine, but can bring certain simultaneously
The problem of, when diesel engine operates in low operating mode, exhaust energy is relatively low, and substantially reduction causes to supply for efficiency of turbocharger and boost pressure
Tolerance is not enough, and in-cylinder combustion is bad, and fuel consumption rise, excessive discharge temperature and discharge performance deteriorate, if selected increase
Depressor selection is too small, and when diesel engine operates in high operating mode, boost pressure and supercharger speed all can be too high, influences diesel engine
With the service life of turbocharger, consecutive pressurization system is using two and the turbocharger of the above, with engine with supercharger
The growth of rotating speed and load, puts into operation in order in succession, so that turbo-charged diesel can be in whole operation range
There is higher pressure ratio and preferable economy, meet the air requirements of different operating mode diesel engines, the sequential pressurizing stage is more, cuts
Change more steady, work more stable.In recent years, diesel engine is enjoyed by its advantage in terms of the thermal efficiency, economy, reliability
Concern, although the use of diesel engine is greatly promoted the development and progress of society, but it also brings along in use
The a series of problem such as environmental pollution, wherein NOx is one of main noxious pollutant, and great danger can be produced to human body
Evil, corresponding Abgasgesetz has been formulated in countries in the world one after another, for marine diesel, in emission control area requirement NOx
It is emitted on original basis in reduction by 70%, EGR technology is that a part of waste gas in diesel exhaust gas is incorporated into air inlet pipe,
With burning is participated in again into cylinder after fresh air mixing, reduce air inlet oxygen content and ignition temperature, and then can reduce
Diesel NOx is discharged and meets emission request.
The content of the invention
It is an object of the invention to provide can realize sequential turbocharging and discharge of the diesel engine in non-emission control area
The sequential turbocharging joint EGR of control zone three stage of the three turbocharger sequential turbocharging that function is realized with EGR
Device and its control method.
The object of the present invention is achieved like this：
The present invention realizes three stage of the three turbocharger sequential turbocharging device of function with EGR, it is characterized in that：Bag
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 bag
Include small compressor, small turbine；The entrance point of No. 1 turbine connects exhaust header by No. 1 blast pipe, and the entrance point of No. 2 turbines leads to
Cross No. 2 blast pipes connection exhaust headers, the entrance point of small size turbine connects exhaust header by small size blast pipe, No. 1 turbine
The port of export, the port of export, the port of export of small turbine of No. 2 turbines connect discharge manifold, delivery pipe connection air；No. 1 compressor,
No. 2 compressors, the entrance points of small compressor connect inlet manifold, inlet manifold one end connection air, other end connection EGR
Pipe, EGR pipe connection discharge manifold, the port of export of No. 1 compressor connects outlet house steward by No. 1 escape pipe, and No. 2 compressors go out
Mouth end connects outlet house stewards by No. 2 escape pipes, and the port of export of small compressor passes through small size escape pipe and connects outlet house steward, outlet
House steward connects inlet manifold by air inlet communicating pipe；Installed on No. 1 blast pipe and No. 2 combustions are installed on No. 1 gas valve, No. 2 blast pipes
Install to install on No. 3 gas valves, No. 1 escape pipe on No. 1 air cutoff valve, No. 2 escape pipes on air valve, small size blast pipe and install 2
EGR valve is installed on number air cutoff valve, small size escape pipe.
There is the present invention EGR to realize that three stage of the three turbocharger sequential turbocharging device of function can also include：
1st, install and pacify in small compressor air control valve, EGR pipe on the inlet manifold between No. 2 compressors and small compressor
Cooler for recycled exhaust gas, EGR washers, small compressor exhaust gas control valve are filled, air inlet installs aerial cooler on communicating pipe.
The present invention realizes three stage of the three turbocharger sequential turbocharging control method of function, its feature with EGR
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 washers and cooler for recycled exhaust gas are not
Participate in work；
(1) when diesel engine is in low operating mode：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：No. 2 gas valves and No. 2 are opened on the basis of the low operating mode of diesel engine
Air valve, makes No. 2 big turbocharger start to devote oneself to work, and now No. 2 big turbocharger and small turbocharger are while work
Make；
(3) when diesel engine operates in high operating mode：Opened on the basis of diesel engine medium-heavy duty No. 1 air cutoff valve and
No. 1 gas shutoff valve, now three turbocharger work simultaneously.
When diesel engine operates in emission control area：
(a) when diesel engine is in low condition range：Close No. 1 gas shutoff valve, No. 2 gas shutoff valves, No. 1 air
Stop 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：Open 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 washers and cooler for recycled exhaust gas are started working, this
When No. 2 big turbocharger and small turbocharger work simultaneously, No. 2 compressor inlets connect air, and small compressor inlet connects
Connect the waste gas after scrubbed and cooling；
(c) when diesel engine operates in high operating mode：Open 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 valves, simultaneously close off small compressor air control valve, EGR is washed
Wash device and cooler for recycled exhaust gas is started working, now three turbocharger work simultaneously, No. 1 compressor, No. 2 compressor inlet connections
Air, the small scrubbed waste gas with after cooling of compressor inlet connection.
Advantage of the invention is 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 mode due to exhaust energy not
Foot, turbocharger is sluggish serious, and cylinder intake air quantity is not enough caused by turbine efficiency is relatively low, and burning deteriorates, fuel consumption compared with
High the problems such as, for three stage sequential turbochargings are with respect to two benches sequential turbocharging, work is more stablized, and transition effect is more
Ideal can take into account overall performance.EGR can also be realized on the basis of three stage sequential pressurizings in emission control area simultaneously,
The oxygen content and maximum combustion temperature of air inlet are reduced, and then reduces the NOx emission of diesel engine, so as to meet emission control area
Emission request, now small size turbocharger air compressor compression is not air but the waste gas after turbine, it is not necessary to additionally borrowed
Help EGR blower fans just to overcome the pressure difference between diesel engine intake and exhaust, improve Diesel Engine Complete Machine efficiency, the EGR rate of diesel engine
It is that, by being adjusted by the EGR valve after small turbocharger air compressor, adjustable range is larger can to realize the different works of diesel engine
The Optimum EGR rate of condition.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is flow chart of the invention.
Embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail：
With reference to Fig. 1-2, three stage of the three turbocharger sequential turbocharging disclosed by the invention that function is realized with EGR
Device mainly includes：It is exhaust header 1, inlet manifold 2, diesel engine 3, No. 3 gas valves 4, No. 1 gas valve 5, No. 2 gas valves 6, small
Turbocharger air compressor exhaust gas control valve 7, EGR washers 8, cooler for recycled exhaust gas 9, the control of small turbocharger air compressor air
Valve 10, No. 1 big turbocharger air compressor 11, No. 1 big turbocharger turbine 12, No. 2 big turbocharger air compressor 13,2
Number big turbocharger turbine 14, small turbocharger air compressor 15, small turbocharger turbine 16, No. 1 air cutoff valve 17,
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；Waste gas difference after the voltage stabilizing of exhaust header 1
Lead to No. 1 big turbocharger, No. 2 big turbine by No. 1 gas shutoff valve 5, No. 2 gas shutoff valves 6, No. 3 gas shutoff valves 4
The entrance of booster and small turbocharger turbine 12,14,16, the waste gas come out from turbocharger turbine 12,14,16 leads to
Cross one be relatively large in diameter 21 directly arrange to air；No. 1 big turbocharger air compressor 11 and No. 2 big turbocharger are calmed the anger
The entrance of machine 13 is directly connected to air, and the small size entrance of turbocharger air compressor 15, which can both be directly connected to air, can also connect useless
The waste gas of air pipe end, wherein they calmed the anger by small turbocharger air compressor air shut-off valve 10 and small turbocharger
Machine exhaust gas control valve 7 is controlled, and small turbocharger is provided with the pipeline of the small entrance of turbocharger air compressor 15 connection air
Installed on EGR line between compressor air control valve 10, small turbocharger air compressor entrance and exhaust pipe 21 end
There are small turbocharger air compressor exhaust gas control valve 7, EGR washers 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 No. 1 air cutoff valve 17, No. 2 air cutoff valves respectively
18 and EGR valve 19 connection the entrance of aerial cooler 20, 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 mode is to adjust the aperture of EGR valve 19 to realize by closed loop
'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 washers 8 and cooler for recycled exhaust gas 9 are not involved in work, and now diesel engine is in pure phase after boost mode.
(1) when diesel engine is in low operating mode：Close No. 1 gas shutoff valve 5, No. 2 gas shutoff valves 6, No. 1 air valves 17
And No. 2 air valves 18, No. 3 gas control valves 4 and standard-sized sheet EGR valve 19 are opened, now only small turbocharger operation, turbine
Circulation area is smaller, and response is fast, and turbine efficiency is high, and acting ability is strong, can produce higher pressure ratio and flow, improve low operating mode
Acceleration and loading response characteristic.
(2) when diesel engine operates in medium-heavy duty：No. 2 gas valves 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, now No. 2 big turbocharger and small turbocharger work simultaneously, turbine
Circulation area increases, and small turbo charger speed will not be made to transfinite, while pressure ratio also will not be too high, air mass flow increase is met
The air requirements of diesel engine medium-heavy duty.
(3) when diesel engine operates in high operating mode：Air mass flow increase required for now diesel engine work, in (2)
On the basis of open No. 1 air cutoff valve 17 and No. 1 gas shutoff valve 5, now three turbocharger work simultaneously, and turbine circulates
Area is maximum, and pressure ratio will not be very high while total flow is larger, meets the air requirements of the high operating mode 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 mode
The air inflow problem of sufficient diesel engine, so when diesel engine is in low operating mode, without EGR, now close No. 1 gas shutoff valve 5,
No. 2 gas shutoff valves 6, No. 1 air cutoff valve 17, No. 2 air cutoff valves 18 and the control of small turbocharger air compressor waste 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
Do not worked with EGR washers, at this moment only small turbocharger operation, turbine circulation area is smaller, response is fast, turbine efficiency
Height, acting ability is strong, can produce higher pressure ratio and flow, the acceleration of the low operating mode of raising and loading response characteristic, meet bavin
The air requirements of the low operating mode of oil machine.
(2) when diesel engine operates in medium-heavy duty, No. 3 gas valves 4 are opened, No. 2 gas valves 6, No. 2 air valves 18, small
Turbocharger air compressor exhaust gas control valve 7, EGR valve 19 keep certain aperture, simultaneously close off small turbocharger air compressor empty
Gas control valve 10, at this moment EGR washers 8 and cooler for recycled exhaust gas 9 start working, now No. 2 big turbocharger and small turbocharging
Device works simultaneously, and No. 2 big entrance of turbocharger air compressor 13 connects air, the small entrance of turbocharger air compressor 15 connection warp
Waste gas after washing and cooling, can so cause the specific heats of gases entered in inlet manifold 2 to be held increases, oxygen content reduction, finally
Maximum combustion temperature is caused to reduce, NOx emission reduction, simultaneously because supercharged diesel engine excess air coefficient is larger, in waste gas
Containing substantial amounts of oxygen, so the useless internal oxygen content through too small turbocharger air compressor 15 is also higher will not to cause 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 mode, No. 1 gas shutoff valve 5, No. 1 air cutoff valve 17, No. 2 combustion gas are opened
Valve 6, No. 2 air valves 18, No. 3 gas valves 4, small turbocharger air compressor exhaust gas control valve 7, EGR valves 19 keep certain aperture,
Small turbocharger air compressor air shut-off valve 10 is simultaneously closed off, at this moment EGR washers and cooler for recycled exhaust gas are started working, now
Three turbocharger work simultaneously, 1, No. 2 big turbocharger air compressor 11,13 entrances connection air, small turbocharger pressure
The scrubbed waste gas with after cooling of the entrance of mechanism of qi 15 connection, total circulation area of turbine is maximum, and boost pressure will not be very high, simultaneously
Maximum flow, meets the air required for high operating mode burning, while entering by small turbocharger air compressor in inlet manifold 2
Waste gas the specific heats of gases in inlet manifold 2 can be made to hold increase, oxygen content reduction ultimately results in maximum combustion temperature reduction, NOx
Discharge reduction, simultaneously because supercharged diesel engine excess air coefficient is very big, also contains substantial amounts of oxygen, so through too small in waste gas
Oxygen content is also higher in the waste gas of turbocharger air compressor 15, gas oxygen content will not be caused in inlet manifold 2 very low and then
Influence combustion quality.
Claims (3)
1. three stage of the three turbocharger sequential turbocharging device of function is realized with EGR, it is characterized in that：Including exhaust collection
Pipe, inlet manifold, No. 1 big turbocharger, No. 2 big turbocharger, small turbocharger, No. 1 big turbocharger include 1
Number compressor, No. 1 turbine, No. 2 big turbocharger include No. 2 compressors, No. 2 turbines, and small turbocharger includes small calm the anger
Machine, small turbine；The entrance point of No. 1 turbine connects exhaust header by No. 1 blast pipe, and the entrance point of No. 2 turbines passes through No. 2 exhausts
Pipe connects exhaust header, and the entrance point of small size turbine connects exhaust header by small size blast pipe, the port of export of No. 1 turbine, No. 2
The port of export of turbine, the port of export of small turbine connect discharge manifold, delivery pipe connection air；No. 1 compressor, No. 2 compressors,
The entrance point of small compressor connects inlet manifold, inlet manifold one end connection air, other end connection EGR pipe, EGR pipe connection
Discharge manifold, the port of export of No. 1 compressor connects outlet house steward by No. 1 escape pipe, and the port of export of No. 2 compressors passes through No. 2
Escape pipe connects outlet house steward, and the port of export of small compressor connects outlet house steward by small size escape pipe, and outlet house steward is by entering
Gas communicating pipe connects inlet manifold；Installed on No. 1 blast pipe and No. 2 gas valves are installed on No. 1 gas valve, No. 2 blast pipes, trumpet row
Install to install on No. 3 gas valves, No. 1 escape pipe on tracheae and No. 2 air interceptions are installed on No. 1 air cutoff valve, No. 2 escape pipes
EGR valve is installed on valve, small size escape pipe.
2. three stage of the three turbocharger sequential turbocharging device according to claim 1 that function is realized with EGR,
It is characterized in that：Install and pacify in small compressor air control valve, EGR pipe on inlet manifold between No. 2 compressors and small compressor
Cooler for recycled exhaust gas, EGR washers, small compressor exhaust gas control valve are filled, air inlet installs aerial cooler on communicating pipe.
3. three stage of the three turbocharger sequential turbocharging control method of function is realized with EGR, it is characterized in that：
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 washers and cooler for recycled exhaust gas are not involved in
Work；
(1) when diesel engine is in low operating mode：No. 1 gas shutoff valve of closing, No. 2 gas shutoff valves, No. 1 air valve and No. 2
Air valve, opens No. 3 gas control valves and standard-sized sheet EGR valve；
(2) when diesel engine operates in medium-heavy duty：No. 2 gas valves and No. 2 air are opened on the basis of the low operating mode of diesel engine
Valve, makes No. 2 big turbocharger start to devote oneself to work, now No. 2 big turbocharger and small turbocharger work simultaneously；
(3) when diesel engine operates in high operating mode：No. 1 air cutoff valve and No. 1 are opened on the basis of diesel engine medium-heavy duty
Gas shutoff valve, now three turbocharger work simultaneously.
When diesel engine operates in emission control area：
(a) when diesel engine is in low condition range：Close No. 1 gas shutoff valve, No. 2 gas shutoff valves, No. 1 air interceptions
Valve, No. 2 air cutoff valves and small compressor exhaust gas control valve, open No. 3 gas control valves, small compressor air control valves simultaneously
Standard-sized sheet EGR valve,；
(b) when diesel engine operates in medium-heavy duty：No. 3 gas valves, No. 2 gas valves, No. 2 air valves, small compressors are opened to give up
Gas control valve, EGR valve, simultaneously close off small compressor air control valve, and EGR washers and cooler for recycled exhaust gas are started working, and now 2
Number big turbocharger and small turbocharger works simultaneously, and No. 2 compressor inlets connect air, and small compressor inlet, which is connected, to pass through
Waste gas after washing and cooling；
(c) when diesel engine operates in high operating mode：Open No. 1 gas shutoff valve, No. 1 air cutoff valve, No. 2 gas valves, No. 2 skies
Air valve, No. 3 gas valves, small compressor exhaust gas control valve, EGR valves, simultaneously close off small compressor air control valve, EGR washers
Started working with cooler for recycled exhaust gas, now three turbocharger work simultaneously, No. 1 compressor, No. 2 compressor inlet connection air,
The small scrubbed waste gas with after cooling of compressor inlet connection.
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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 |
| CN112377280A (en) * | 2020-11-04 | 2021-02-19 | 哈尔滨工程大学 | Supercharged engine exhaust energy gradient utilization system and utilization method thereof |
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| US20120124992A1 (en) * | 2010-11-18 | 2012-05-24 | Fiveland Scott B | Fluid handling system having dedicated egr turbo-generator |
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| Publication number | Publication date |
|---|---|
| CN107060989B (en) | 2019-05-17 |
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