CN201236737Y - Novel diesel engine reprocessing system - Google Patents
Novel diesel engine reprocessing system Download PDFInfo
- Publication number
- CN201236737Y CN201236737Y CNU2007201297114U CN200720129711U CN201236737Y CN 201236737 Y CN201236737 Y CN 201236737Y CN U2007201297114 U CNU2007201297114 U CN U2007201297114U CN 200720129711 U CN200720129711 U CN 200720129711U CN 201236737 Y CN201236737 Y CN 201236737Y
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- Prior art keywords
- dpf
- doc
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- initiative
- particulate matter
- 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 - Fee Related
Links
- 238000012958 reprocessing Methods 0.000 title 1
- 230000008929 regeneration Effects 0.000 claims abstract description 24
- 238000011069 regeneration method Methods 0.000 claims abstract description 24
- 239000013618 particulate matter Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 11
- 230000003647 oxidation Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000012805 post-processing Methods 0.000 abstract description 3
- 230000001172 regenerating effect Effects 0.000 abstract 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Landscapes
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
The utility model relates to a novel diesel engine post-processing system, which enables a DOC to work normally during cold start process while the generating of CO and HC during the regeneration process of an initiative regenerative DPF is solved. The post-processing system is characterized in that a first stage DOC (10) is arranged on one side of an exhaust manifold; the initiative regenerative DPF (20) and a second stage DOC (30) are arranged on an exhaust pipeline in exhaust direction sequence; the initiative regenerative DPF (20) is provided with an electric heater; the heating method of the initiative regenerative DPF can effectively improve discharge temperature during the cold start stage of an engine, thereby allowing the second stage DOC to work in advance, and reducing the HC and CO emission during cold start stage; and the first stage DOC can partially oxidize the particulate matter in the discharged gas, thereby prolonging the interval between each two DPF regenerations, prolonging DPF service life and relatively reducing oil consumption of the engine.
Description
Technical field
The utility model relates to the diesel exhaust aftertreatment technology.
Background technique
Along with the exhaustion day by day of global warming and fossil fuel, the diesel engine with higher fuel economy and less CO2 discharging is subjected to the favor of Consumer and automobile vendor day by day.According to recent statistics, it all is diesel-oil vehicle that there is the new car more than 1/3rd in present Europe.In order to protect human physical environment of depending on for existence better, strict more Abgasgesetz has all been formulated in countries in the world in addition.For diesel engine, because himself works particulate matter PM (particulatematters) and nitrogen oxide NO
x(nitrogen oxides) is its two big main effulents.In order to satisfy various countries' Abgasgesetz to the constantly strict emission request of PM, diesel engine particle catcher DPF (Diesel Particulate Filter) technology progressively grows up.
DPF generally adopts the wall flow type ceramic carrier, incites somebody to action when exhaust is passed through under the fine particle thing capture wherein.In order to guarantee that DPF can reuse for a long time, need the particulate matter that trap be burnt by certain measure in addition, this process is commonly referred to as regeneration.Common regenerative process mainly is divided into initiative regeneration and passive regeneration dual mode now.Passive regeneration is by at carrier surface noble metal-coating catalyzer or add catalyzer in fuel oil, reduce the oxidizing reaction temperature of particulate matter, thereby most of particulate matters that will trap in the motor normal course of operation regenerates.This regenerated way is relatively stricter to the S content requirement in the fuel oil, and fitness for purpose is lower than 15ppm.Because S can poison noble metal catalyst, make its forfeiture catalysis.Because S content is generally higher in the Chinese domestic diesel oil, can reach more than the 1000ppm, therefore this regenerated way is not suitable for the domestic popularization in China substantially.And initiative regeneration be meant by electric heating or in outlet pipe the method for direct injection fuel oil improve delivery temperature, thereby the particulate matter among the DPF is regenerated.But because the oxidation reaction of this particulate matter is to take place under a kind of extremely uneven condition of transient state, so particulate matter is difficult to abundant oxidation reaction takes place, and can generate a large amount of CO and HC etc. in the regenerative process.
Diesel oxidation catalyst DOC (Diesel Oxidation Catalyst) is the technology of a kind of special minimizing diesel engine HC and CO discharging, and can the partial oxidation particulate matter.But starting working, DOC needs certain temperature condition, very low to the oxidation efficiency of HC and CO when diesel engine cold start-up graduated discharge temperature is low.For Ou Si and later Abgasgesetz, can the CO and the HC discharging that how to solve the cold start-up stage also become the key that satisfy the rules limit value.
The model utility content
The purpose of this utility model provides a kind of novel diesel machine after-treatment system, and in the CO and HC that generates in solving initiative regeneration dpf regeneration process, guaranteeing can proper functioning in the DOC cold start-up process.
For achieving the above object, the utility model has adopted following technological scheme: native system is provided with first order DOC in the gas exhaust manifold side, discharge directions along gas exhaust piping is disposed with initiative regeneration DPF and second level DOC, described initiative regeneration DPF is equipped with electric heater, and the electric heater heating reaches more than 600 ℃ delivery temperature.
As shown from the above technical solution, utilize ripe DOC technology to solve CO and the HC that generates in the initiative regeneration dpf regeneration process, the development amount is little, and technology is reliably effective, solve the subject matter that initiative regeneration DPF exists with less cost, made this technology have more practicability; Because the present oil product of China is considered to passive regeneration and is not suitable for applying at home, the utility model efficiently solves similar China post-processing problem of the oil product of production at present.
The heater means of initiative regeneration DPF can improve delivery temperature effectively in the engine cold-start stage, thereby makes second level DOC work in advance, can reduce the HC and the CO discharging in cold start-up stage effectively.
The particulate matter of first order DOC in can the partial oxidation exhaust, thus interval between twice regeneration of DPF prolonged, thus the working life of improving DPF, and can reduce engine consumption relatively.
Description of drawings
Fig. 1 is a system architecture schematic representation of the present utility model.
Embodiment
As shown in Figure 1, it is at first to arrange first order DOC10 in the gas exhaust manifold side that fundamental system of the present utility model constitutes, and arranges initiative regeneration DPF20 successively along gas exhaust piping, and arranges second level DOC30 again in the DPF20 back.
Described initiative regeneration DPF20 is equipped with electric heater, and the electric heater heating reaches more than 600 ℃ delivery temperature; In the engine cold-start stage, electric heater is implemented heating to exhaust.
Below in conjunction with Fig. 1 working principle of the present utility model is described.
First order DOC when work be to most of HC and C0 in the diesel exhaust gas, and the part particulate matter carries out oxidation, and initiative regeneration DPF captures particulate matter remaining in the exhaust.Because the oxidized part particulate matter of first order DOC (comprise stick to above the particulate matter HC etc.), so the particulate matter quality that DPF traps just reduced, thereby prolonged the time lag between the regenerative process twice, and is highly beneficial to the working life of DPF system.When the particulate matter among the DPF traps a certain amount of the time, begin exhaust is heated by heater, make it reach the temperature (being generally more than 600 ℃) that particulate regeneration needs, thus make particulate matter begin with exhaust in oxygen react and burnt.HC that generates in the particulate matter regenerative process and CO will be oxidized to water and carbon dioxide when process is partial.Second level DOC will be that the particulate matter that filters out carries out secondary oxidation to DPF also in addition.HC in the exhaust, CO and majority of particles thing will be oxidized to water and carbon dioxide like this.This external engine cold-start stage, heater also begins exhaust is heated, and when first order DOC can't begin proper functioning, second level DOC had just reached its initiation temperature like this, start working, a large amount of HC and CO that the cold start-up stage is generated oxidize away.
Claims (2)
1, a kind of novel diesel machine after-treatment system, it is characterized in that: native system is provided with first order DOC (10) in the gas exhaust manifold side, discharge directions along gas exhaust piping is disposed with initiative regeneration DPF (20) and second level DOC (30), described initiative regeneration DPF (20) is equipped with electric heater, and the electric heater heating reaches more than 600 ℃ delivery temperature.
2, a kind of novel diesel machine after-treatment system according to claim 1 is characterized in that: in DPF (20) initiative regeneration process, CO and HC that the reaction of particulate matter incomplete oxidation is generated will be by second level DOC (30) oxidations in its downstream; Electric heater also heats exhaust in the engine cold-start process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201297114U CN201236737Y (en) | 2007-12-26 | 2007-12-26 | Novel diesel engine reprocessing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201297114U CN201236737Y (en) | 2007-12-26 | 2007-12-26 | Novel diesel engine reprocessing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201236737Y true CN201236737Y (en) | 2009-05-13 |
Family
ID=40649476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201297114U Expired - Fee Related CN201236737Y (en) | 2007-12-26 | 2007-12-26 | Novel diesel engine reprocessing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201236737Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900500A (en) * | 2012-09-27 | 2013-01-30 | 三一重工股份有限公司 | Engine post-processing system, engine and vehicle |
| CN108798834A (en) * | 2018-05-03 | 2018-11-13 | 上海汽车集团股份有限公司 | The control device and method of diesel-engine road vehicle low emission |
-
2007
- 2007-12-26 CN CNU2007201297114U patent/CN201236737Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900500A (en) * | 2012-09-27 | 2013-01-30 | 三一重工股份有限公司 | Engine post-processing system, engine and vehicle |
| CN102900500B (en) * | 2012-09-27 | 2014-09-10 | 三一重工股份有限公司 | Engine post-processing system, engine and vehicle |
| CN108798834A (en) * | 2018-05-03 | 2018-11-13 | 上海汽车集团股份有限公司 | The control device and method of diesel-engine road vehicle low emission |
| CN108798834B (en) * | 2018-05-03 | 2020-12-22 | 上海汽车集团股份有限公司 | Control device and method for low emission of diesel engine vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Tang Maosheng Document name: Notification of patent rights granted to utility models and formalities for registration |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090513 Termination date: 20121226 |