CN109854397A - A kind of vehicle exhaust after-treatment system can effectively reduce discharged nitrous oxides - Google Patents
A kind of vehicle exhaust after-treatment system can effectively reduce discharged nitrous oxides Download PDFInfo
- Publication number
- CN109854397A CN109854397A CN201910270961.7A CN201910270961A CN109854397A CN 109854397 A CN109854397 A CN 109854397A CN 201910270961 A CN201910270961 A CN 201910270961A CN 109854397 A CN109854397 A CN 109854397A
- Authority
- CN
- China
- Prior art keywords
- lambda sensor
- lnt
- equipment
- engine body
- flow meter
- 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.)
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- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 title claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- -1 engine body (1) Chemical class 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 239000000446 fuel Substances 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a kind of vehicle exhaust after-treatment systems that can effectively reduce discharged nitrous oxides, including engine body；The inlet end of the engine body is provided with air flow meter, and the exhaust pipe of the engine body is connected with LNT equipment, and the inlet end of the LNT equipment is equipped with the first lambda sensor, and the outlet side of the LNT equipment is equipped with the second lambda sensor；It further include ECM assembly, the air flow meter, first lambda sensor and second lambda sensor is electrically connected in the ECM assembly, and the ECM assembly can receive the metrical information of the air flow meter, first lambda sensor and second lambda sensor；The object of the present invention is to provide a kind of vehicle exhaust after-treatment systems that can effectively reduce discharged nitrous oxides, to solve the problems in background technique.
Description
Technical field
The invention belongs to vehicle maintenance service system regions, and in particular to a kind of vapour that can effectively reduce discharged nitrous oxides
Tail gas after-treatment system.
Background technique
It is required according to national legislation, requirement of the different phase to the nuisance of exhaust emissions is different, nitrogen therein
Oxide (NOx), which is discharged into atmosphere, to generate acid nitrate compound, this nitrification with vapor in the atmosphere reaction
Closing object is a kind of major pollutants to form acid rain；Nitrogen oxides (NOx) is by burning indoor nitrogen and oxygen at high temperature
What reaction generated.In three stage of state, increasing egr system on the engine reduces the temperature of combustion chamber, but can not
Fundamentally completely cut off the generation of NOx compound.
Summary of the invention
The object of the present invention is to provide a kind of vehicle exhaust after-treatment systems that can effectively reduce discharged nitrous oxides, with solution
Certainly the problems in background technique.
The technical solution provided by the present invention is: a kind of vehicle exhaust post-processing system that can effectively reduce discharged nitrous oxides
System, including engine body；
The inlet end of the engine body is provided with air flow meter, and the exhaust pipe of the engine body is connected with
LNT equipment, the inlet end of the LNT equipment are equipped with the first lambda sensor, and the outlet side of the LNT equipment is sensed equipped with the second oxygen
Device；
It further include ECM assembly, the air flow meter, first lambda sensor is electrically connected in the ECM assembly
With second lambda sensor, the ECM assembly can receive the air flow meter, first lambda sensor and described
The metrical information of two lambda sensors.
As an improvement of the present invention, the inlet end of the engine body is additionally provided with air cleaner, the sky
The outlet side of air cleaner is connected to the inlet end of the air flow meter.
As an improvement of the present invention, the end of the outlet side of the LNT equipment is provided with muffler ASSY.
The utility model has the advantages that
The present invention cooperates the first lambda sensor and second by being provided with LNT equipment in engine rear end, by LNT equipment
Lambda sensor, and collected by the control of ECM assembly store nitrogen oxides and and catalyst reaction, be effectively reduced nitrogen oxygen
The discharge amount of compound.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is working state schematic representation of the invention；
Fig. 3 is work flow diagram of the invention.
In figure: 1- engine body, 2- air flow meter, 3-LNT equipment, the first lambda sensor of 4-, the second oxygen of 5- sensing
Device, 6-ECM assembly, 7- air cleaner, 8- muffler ASSY.
Specific embodiment
Embodiments of the present invention will be further described below with reference to the accompanying drawings.
As shown in Figure 1 to Figure 3, the vehicle exhaust post-processing system that can effectively reduce discharged nitrous oxides in the present embodiment
System, including engine body 1, the inlet end of the engine body 1 are provided with air flow meter 2, the engine body 1
Exhaust pipe is connected with LNT equipment 3, and the inlet end of the LNT equipment 3 is equipped with the first lambda sensor 4, the outlet of the LNT equipment 3
End is equipped with the second lambda sensor 5；LNT equipment 3 in the present embodiment is existing lean-burn nitrogen oxides trapping technique equipment；
It further include existing ECM assembly 6, the air flow meter 2, described first is electrically connected in the ECM assembly 6
Lambda sensor 4 and second lambda sensor 5, the ECM assembly 6 can receive the air flow meter 2, first oxygen passes
The metrical information of sensor 4 and second lambda sensor 5.
In the present embodiment, the inlet end of the engine body 1 is additionally provided with air cleaner 7, the air cleaner 7
Outlet side be connected to the inlet end of the air flow meter 2；It is total that the end of the outlet side of the LNT equipment 3 is provided with silencer
At 8.
When the present embodiment is in use, the first lambda sensor 4 detects containing for oxygen in the tail gas being discharged in engine body 1
Amount, and the signal is fed back into ECM assembly 6, in normal operation, ECM assembly 6 judges that LNT is set according to this signal
The air-fuel ratio of standby 3 front ends, when the relatively low namely lean-burn of air-fuel (oxygen content is higher in tail gas), LNT equipment 3 is stored
Nitrogen oxides；At this point, the nitrogen oxides in tail gas can be sent out with oxygen under the action of platinum (Pt) and catalyst in LNT equipment 3
Biochemical reaction generates nitrogen dioxide, and is further stored in the form of nitrate in the trap of LNT equipment 3；With tail
Nitrogen oxides in gas constantly exists in LNT equipment 3, and the nitrogen oxides storage amount in LNT equipment 3 has exceeded the threshold value of equipment
Afterwards, EMC assembly 6 is by adjusting air inflow and distributive value to increase air-fuel ratio, and engine body 1 enters dense combustion state (tail at this time
Oxygen content is lower in gas), the content of HC and CO in tail gas can rise, while nitrogen dioxide can be precipitated in nitrate, and in tail gas
HC and CO can be chemically reacted with nitrogen dioxide, generate to the water of free of air pollution, carbon dioxide and nitrogen, to make
The nitrogen oxides stored in LNT equipment 3 constantly declines；During discharging nitrogen oxides, the meeting basis of ECM assembly 6 is mounted on
5 theoretical air-fuel ratio of the second lambda sensor of 3 rear end of LNT equipment, and compare the air-fuel ratio obtained according to the first lambda sensor 4 and root
The difference between air-fuel ratio obtained according to the second lambda sensor 5 then shows nitrogen oxidation when the difference of the two air-fuel ratios is 0
The release of object finishes, and after nitrogen oxides discharges, ECM assembly 6 can be returned to normal Injection Control state.
It is convenient for statement, herein referred "upper", "lower", "left", "right", "front", "rear" etc. represent the description in direction with
The left and right directions of attached drawing itself is consistent, but does not play restriction effect to structure of the invention；In addition, the invention is not limited to upper
State specific embodiment, those skilled in the art can also make a variety of variations accordingly, but it is any with it is of the invention equivalent or similar
Variation should all cover within the scope of the claims.
Claims (3)
1. a kind of vehicle exhaust after-treatment system that can effectively reduce discharged nitrous oxides, including engine body (1), feature
It is:
The inlet end of the engine body (1) is provided with air flow meter (2), and the exhaust pipe of the engine body (1) connects
It is connected to LNT equipment (3), the inlet end of the LNT equipment (3) is equipped with the first lambda sensor (4), the outlet of the LNT equipment (3)
End is equipped with the second lambda sensor (5)；
It further include ECM assembly (6), the air flow meter (2) is electrically connected in the ECM assembly (6), first oxygen passes
Sensor (4) and second lambda sensor (5), the ECM assembly (6) can receive the air flow meter (2), described first
The metrical information of lambda sensor (4) and second lambda sensor (5).
2. a kind of vehicle exhaust after-treatment system that can effectively reduce discharged nitrous oxides according to claim 1, special
Sign is:
The inlet end of the engine body (1) is additionally provided with air cleaner (7), the outlet side of the air cleaner (7)
It is connected to the inlet end of the air flow meter (2).
3. a kind of vehicle exhaust after-treatment system that can effectively reduce discharged nitrous oxides according to claim 1, special
Sign is:
The end of the outlet side of the LNT equipment (3) is provided with muffler ASSY (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910270961.7A CN109854397A (en) | 2019-04-04 | 2019-04-04 | A kind of vehicle exhaust after-treatment system can effectively reduce discharged nitrous oxides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910270961.7A CN109854397A (en) | 2019-04-04 | 2019-04-04 | A kind of vehicle exhaust after-treatment system can effectively reduce discharged nitrous oxides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109854397A true CN109854397A (en) | 2019-06-07 |
Family
ID=66903372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910270961.7A Pending CN109854397A (en) | 2019-04-04 | 2019-04-04 | A kind of vehicle exhaust after-treatment system can effectively reduce discharged nitrous oxides |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749135A (en) * | 2008-12-17 | 2010-06-23 | 浙江永源汽车有限公司 | Vehicle exhaust emission control technology |
| CN202001122U (en) * | 2011-04-14 | 2011-10-05 | 重庆长安伟世通发动机控制系统有限公司 | Closed-loop control system for electronic fuel injection engine under full-load working condition |
| CN102688691A (en) * | 2011-03-24 | 2012-09-26 | 通用汽车环球科技运作有限责任公司 | Manganese-based oxides promoted lean nox trap (lnt) catalyst |
| CN107023355A (en) * | 2015-12-11 | 2017-08-08 | 现代自动车株式会社 | Waste gas cleaning system and its control method |
| CN209942952U (en) * | 2019-04-04 | 2020-01-14 | 江西五十铃汽车有限公司 | Automobile exhaust after-treatment system capable of effectively reducing emission of nitrogen oxides |
-
2019
- 2019-04-04 CN CN201910270961.7A patent/CN109854397A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749135A (en) * | 2008-12-17 | 2010-06-23 | 浙江永源汽车有限公司 | Vehicle exhaust emission control technology |
| CN102688691A (en) * | 2011-03-24 | 2012-09-26 | 通用汽车环球科技运作有限责任公司 | Manganese-based oxides promoted lean nox trap (lnt) catalyst |
| US20120240554A1 (en) * | 2011-03-24 | 2012-09-27 | GM Global Technology Operations LLC | MANGANESE-BASED OXIDES PROMOTED LEAN NOx TRAP (LNT) CATALYST |
| CN202001122U (en) * | 2011-04-14 | 2011-10-05 | 重庆长安伟世通发动机控制系统有限公司 | Closed-loop control system for electronic fuel injection engine under full-load working condition |
| CN107023355A (en) * | 2015-12-11 | 2017-08-08 | 现代自动车株式会社 | Waste gas cleaning system and its control method |
| CN209942952U (en) * | 2019-04-04 | 2020-01-14 | 江西五十铃汽车有限公司 | Automobile exhaust after-treatment system capable of effectively reducing emission of nitrogen oxides |
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