CN203847216U - Air inlet device for controlling exhaust temperature by utilizing waste gas drainage - Google Patents
Air inlet device for controlling exhaust temperature by utilizing waste gas drainage Download PDFInfo
- Publication number
- CN203847216U CN203847216U CN201420039278.5U CN201420039278U CN203847216U CN 203847216 U CN203847216 U CN 203847216U CN 201420039278 U CN201420039278 U CN 201420039278U CN 203847216 U CN203847216 U CN 203847216U
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- CN
- China
- Prior art keywords
- scr
- treatment device
- motor
- turbosupercharger
- intercooler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000002912 waste gas Substances 0.000 title claims description 13
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 abstract 1
- 230000008676 import Effects 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 18
- 239000007789 gas Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 230000009466 transformation Effects 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 6
- 229910021653 sulphate ion Inorganic materials 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02T10/40—Engine management systems
Landscapes
- Supercharger (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model provides an utilize exhaust gas drainage control exhaust temperature's air inlet unit, including intercooler (1), turbo charger (2), SCR after-treatment device (3) and drainage pipeline (6), the compressor export of turbo charger (2) is linked together through the intake pipe of intercooler (1) with engine (2), the turbine export of turbo charger (2) is linked together with SCR after-treatment device (3), be provided with temperature sensor (5) on SCR after-treatment device (3) the gas vent, drainage pipeline (6) one end is linked together with the turbine import of turbo charger (2), drainage pipeline (6) the other end is linked together with intercooler (1) export, be provided with controllable valve (7) on drainage pipeline (6), temperature sensor (5) and controllable valve (7) are connected with engine ECU unit (8) electricity respectively. The catalyst conversion efficiency in the engine SCR aftertreatment device (3) is improved.
Description
Technical field
The utility model relates to a kind of engine intake duct, relates in particular a kind of air inlet system that utilizes waste gas drainage to control delivery temperature.
Background technique
The pest that mainly contains of motor car engine burning and exhausting is mainly nitrogen oxide (NOx) and various particulate (PM), and along with the raising day by day of national automobile exhaust emission standard, motor exhaust after-treatment system has become an indispensable system of motor; At present domestic large-scale Vehicle Turbocharged Diesel Engines producer generally adopts SCR after-treatment device to fall low NOx drainage.The catalyzer transformation efficiency of SCR after-treatment device depends on delivery temperature, and generally, the catalyst temperature in SCR after-treatment device is during higher than 280 ℃, and sulphate can produce and decomposes and discharge with tail gas, makes the transformation efficiency of catalyzer reach optimum efficiency; If delivery temperature is too low, the transformation efficiency of catalyzer is low, and deterioration of emission causes OBD to report to the police and limits and turn round when serious.
Yet vehicle is under road condition, motor is in a kind of instantaneous conditions, traffic light are a lot of and road conditions are bad, motor operates in middle low velocity zone for a long time, add that load is on the low side, when engine exhaust arrives catalyst converter through outlet pipe, temperature is not high, by market user's collection in worksite data, find, the delivery temperature at catalyst converter place is not higher than 240 ℃; In addition, China Diesel sulphur content is higher, for the diesel engine that has adopted SCR after-treatment device, the sulphate that motor in-cylinder combustion produces is discharged with tail gas, during through catalyst converter, sulphate can partly be attached in the coating of catalyzer, and these sulphate have covered the coating of catalyzer soon, cause and in exhaust, contain a large amount of sulphate, thereby SCR after-treatment device is sharply declined to the transformation efficiency of NOx, make NOx discharge surpass the limit value of national legislation to NOx, and then cause that motor limit turns round, have a strong impact on driving; Therefore improve delivery temperature, solution catalyzer transformation efficiency and sulfur poisoning problem imperative.On the other hand, at arctic weather, motor rubs greatly, makes process slow in warming-up process, cause engine warm-up Economy and emission performance poor, so rapid warming-up technology is also subject to people's attention.
Chinese invention patent application publication number: CN 101514651A, application open Augusts 26 in 2009 day day, are called: disclose a kind of method that exhaust gases of internal combustion engines heats up or is incubated in the application for a patent for invention of the insulation of < < exhaust gases of internal combustion engines or the method heating up and device > > thereof, when the method is engines tail gas disposal, on engine exhaust tube wall, be coated with one deck or heat insulating coating more than one deck, to reduce tail gas heat quantity loss, play heat insulation effect; Or a firing unit is set on engine exhaust tube wall tail gas is carried out to heat temperature raising, thereby maintain exhaust temperature within the scope of the optimum response active temperature of SCR.But this application for a patent for invention complex structure, increases burner and also increased a lot of costs, firing unit is set, and to outlet pipe, heating needs extra energy, and economic performance is declined; And the method can not shorten warming-up process.
Summary of the invention
That the purpose of this utility model is is lower for existing engine exhaust temperature, make the problems such as SCR after-treatment device catalyzer transformation efficiency is low, and a kind of air inlet system that utilizes waste gas drainage to control delivery temperature is provided.
For achieving the above object, technical solution of the present utility model is: a kind of air inlet system that utilizes waste gas drainage to control delivery temperature, comprise intercooler, turbosupercharger and SCR after-treatment device, described turbosupercharger is arranged on waste pipe, the blower outlet of turbosupercharger is connected with the suction tude of motor through intercooler, the turbo machine outlet of turbosupercharger is connected with SCR after-treatment device, on described SCR after-treatment device relief opening, be provided with temperature transducer, described temperature transducer is electrically connected to Engine ECU unit, between the turbine inlet of described turbosupercharger and intercooler outlet, be provided with a drainage pipe, described drainage pipe one end is connected with the turbine inlet of turbosupercharger, the drainage pipe the other end is connected with intercooler outlet, on described drainage pipe, be provided with controllable valve, described controllable valve is electrically connected to Engine ECU unit.
On the outer wall of described drainage pipe employing heat-insulated pipe or drainage pipe, be provided with thermal insulating material.
Described controllable valve adoption rate valve or servovalve.
Compared with prior art, the beneficial effects of the utility model are:
1, simple in structure, with low cost, improved the catalyzer transformation efficiency in motor SCR after-treatment device.In the utility model, on SCR after-treatment device relief opening, be provided with temperature transducer, between the turbine inlet of turbosupercharger and intercooler outlet, be provided with a drainage pipe, on drainage pipe, be provided with controllable valve, controllable valve and temperature transducer are electrically connected to Engine ECU unit respectively; During work, utilize the waste gas control engine delivery temperature of drainage, when engine section is loaded, improve the delivery temperature of motor, improve catalyzer transformation efficiency, avoid the OBD warning and the motor limit that due to the inefficacy of SCR after-treatment device, produce to turn round problem.
2, in engine cold-start process, by improving intake temperature, increase motor in-cylinder combustion temperature, help motor rapid warming-up, solved the slower problem of supercharged engine warming-up speed.
3, engine operation, when little load, by tail gas before drainage pipe bypass turbine, reduces exhaust back pressure, reduces pumping loss, improves motor Economy.
Accompanying drawing explanation
Fig. 1 is the utility model controllable valve opening state structural representation.
Fig. 2 is the utility model controllable valve closed condition structural representation.
In figure: intercooler 1, turbosupercharger 2, SCR after-treatment device 3, motor 4, temperature transducer 5, drainage pipe 6, controllable valve 7, Engine ECU unit 8, suction tude 9, outlet pipe 10.
Embodiment
Below in conjunction with accompanying drawing explanation and embodiment, the utility model is described in further detail.
Referring to Fig. 1-Fig. 2, a kind of air inlet system that utilizes waste gas drainage to control delivery temperature, comprise intercooler 1, turbosupercharger 2 and SCR after-treatment device 3, described turbosupercharger 2 is arranged on the outlet pipe of motor 4, the blower outlet of turbosupercharger 2 is connected with the suction tude of motor 2 through intercooler 1, and the turbo machine outlet of turbosupercharger 2 is connected with SCR after-treatment device 3.On described SCR after-treatment device 3 relief openings, be provided with temperature transducer 5, described temperature transducer 5 is electrically connected to Engine ECU unit 8.Between the turbine inlet of described turbosupercharger 2 and intercooler 1 outlet, be provided with a drainage pipe 6, described drainage pipe 6 one end are connected with the turbine inlet of turbosupercharger 2, and drainage pipe 6 the other ends are connected with intercooler 1 outlet; On described drainage pipe 6, be provided with controllable valve 7, described controllable valve 7 is electrically connected to Engine ECU unit 8, in order to regulate the gas flow in drainage pipe 6, and the best adoption rate valve of controllable valve 7 or servovalve.Described drainage pipe 6 has heat insulation function; Preferably, on the outer wall of drainage pipe 6 employing heat-insulated pipes or drainage pipe 6, be provided with thermal insulating material.
Referring to Fig. 1-Fig. 2, during motor 4 work, under certain condition, open controllable valve 7, the part waste gas that motor 4 is discharged directly enters in the suction tude of motor 4, can improve motor 4 delivery temperatures, prevents that SCR after-treatment device 3 from sulfur poisoning phenomenon occurring; Can booster engine 4 warming-up processes.In Fig. 1, described controllable valve 7 is in opening state, and the waste gas that motor 4 is discharged all enters SCR after-treatment device 3 through the turbo machine of turbosupercharger 2 and by outlet pipe 10, discharges, when this state is applicable to motor 4 middle and high load operation; In Fig. 2, described controllable valve 7 is in closed condition, and the part waste gas that motor 4 is discharged directly enters in the suction tude of motor 2, when this state is applicable to motor 4 and is operated in little load or instantaneous conditions or motor 4 cold start-up.Specific works process is as follows:
Referring to Fig. 2, when motor 4 is operated in little load or instantaneous conditions, it is too low that temperature transducer 5 monitors the temperature of SCR after-treatment device 3, temperature transducer 5 transmits a signal to Engine ECU unit 8, it is open-minded that Engine ECU unit 8 sends SC sigmal control controllable valve 7, thereby introduce High Temperature High Pressure tail gas in the suction tude of motor 4, motor 4 intake temperature have been improved, and then motor 4 delivery temperatures have been improved, make sulphate not be adsorbed on catalyst surface, can immediately decompose, guarantee the activity of catalyzer, SCR after-treatment device 3 catalyzer transformation efficiencies are improved greatly.In addition, when motor 4 is operated in little load, by tail gas before drainage pipe 6 bypass turbines, can reduce exhaust back pressure, reduce pumping loss, thereby improve the fuel economy of motor 4.
Referring to Fig. 2, at arctic weather, motor 4 is introduced high-temperature tail gas in the suction tude of motor 4 in warming-up process, the mean temperature that makes to enter in motor 4 cylinders increases, therefore improve motor 4 cylinder combustion and burnt temperature, body and the interior cooling water temperature of motor 4 of motor 4 are improved rapidly, accelerated motor 4 warming-up speed.
In practical application, the utility model is not only applicable to be equipped with the supercharged diesel engine of SCR after-treatment device 3, applicable to the supercharging gasoline engine that SCR after-treatment device 3 is installed yet; Be not only applicable to the motor that single-row cylinder arrangement is arranged, the supercharged engine of yet arranging applicable to cylinder in V-arrangement, applied range.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, said structure all should be considered as belonging to protection domain of the present utility model.
Claims (3)
1. an air inlet system that utilizes waste gas drainage to control delivery temperature, comprise intercooler (1), turbosupercharger (2) and SCR after-treatment device (3), described turbosupercharger (2) is arranged on the outlet pipe of motor (4), the blower outlet of turbosupercharger (2) is connected with the suction tude of motor (2) through intercooler (1), the turbo machine outlet of turbosupercharger (2) is connected with SCR after-treatment device (3), on described SCR after-treatment device (3) relief opening, be provided with temperature transducer (5), described temperature transducer (5) is electrically connected to Engine ECU unit (8), it is characterized in that: between the turbine inlet of described turbosupercharger (2) and intercooler (1) outlet, be provided with a drainage pipe (6), described drainage pipe (6) one end is connected with the turbine inlet of turbosupercharger (2), drainage pipe (6) the other end is connected with intercooler (1) outlet, on described drainage pipe (6), be provided with controllable valve (7), described controllable valve (7) is electrically connected to Engine ECU unit (8).
2. a kind of air inlet system that utilizes waste gas drainage to control delivery temperature according to claim 1, is characterized in that: on the outer wall of described drainage pipe (6) employing heat-insulated pipe or drainage pipe (6), be provided with thermal insulating material.
3. a kind of air inlet system that utilizes waste gas drainage to control delivery temperature according to claim 1, is characterized in that: described controllable valve (7) adoption rate valve or servovalve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420039278.5U CN203847216U (en) | 2014-01-22 | 2014-01-22 | Air inlet device for controlling exhaust temperature by utilizing waste gas drainage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420039278.5U CN203847216U (en) | 2014-01-22 | 2014-01-22 | Air inlet device for controlling exhaust temperature by utilizing waste gas drainage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203847216U true CN203847216U (en) | 2014-09-24 |
Family
ID=51560248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420039278.5U Expired - Lifetime CN203847216U (en) | 2014-01-22 | 2014-01-22 | Air inlet device for controlling exhaust temperature by utilizing waste gas drainage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203847216U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775180A (en) * | 2014-01-22 | 2014-05-07 | 东风商用车有限公司 | Air inlet device for controlling exhaust temperature by utilizing waste gas drainage |
-
2014
- 2014-01-22 CN CN201420039278.5U patent/CN203847216U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775180A (en) * | 2014-01-22 | 2014-05-07 | 东风商用车有限公司 | Air inlet device for controlling exhaust temperature by utilizing waste gas drainage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140924 |