CN101709662A - Diesel engine exhausting after-treatment device and treatment method thereof - Google Patents
Diesel engine exhausting after-treatment device and treatment method thereof Download PDFInfo
- Publication number
- CN101709662A CN101709662A CN200910251449A CN200910251449A CN101709662A CN 101709662 A CN101709662 A CN 101709662A CN 200910251449 A CN200910251449 A CN 200910251449A CN 200910251449 A CN200910251449 A CN 200910251449A CN 101709662 A CN101709662 A CN 101709662A
- Authority
- CN
- China
- Prior art keywords
- diesel engine
- catalyst converter
- treatment device
- egr
- turbosupercharger
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title abstract description 5
- 239000002912 waste gas Substances 0.000 claims abstract description 22
- 239000003054 catalyst Substances 0.000 claims description 56
- 239000007789 gas Substances 0.000 claims description 31
- 238000003672 processing method Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 230000032683 aging Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002779 inactivation Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 9
- 238000004939 coking Methods 0.000 description 7
- 238000007599 discharging Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000005446 dissolved organic matter Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
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
- Exhaust Gas After Treatment (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention relates to a diesel engine exhausting after-treatment device and a treatment method thereof; a catalyzing device with smaller volume is added in front of a pressurizer, so that the exhaust temperature of an engine can be ensured to be higher than the activity temperature of the catalyzing device when in the stage of cold engine, waste gas is purified before entering an EGR, and the ageing of the EGR can be showed down; and when the engine operates under the working condition of large torsion, the temperature of the waste gas is very high, the EGR is not easily coked, but inactivation of the catalyzing device is easily caused. Therefore, a temperature sensor is added at the back of the catalyzing device, and a tee valve is added in front of the catalyzing device, so that whether the waste gas enters into the catalyzing device arranged in front of the pressurizer can be adjusted according to different temperatures. Finally, the high-efficiency function of the EGR and the catalyzing device can be realized at the same time.
Description
Technical field
The present invention relates to the diesel exhaust aftertreatment technology, be specifically related to a kind of diesel engine exhausting after-treatment device and processing method thereof, make the emissions of diesel engines level reach stricter requirement.
Background technique
Diesel engine of the prior art, generally very low in cold start-up graduated discharge temperature, comprise a large amount of unburned organic substance in the exhaust.For adopting the EGR technology to reduce NO
XThe discharging diesel engine, these organic substance are in entering egr system, and coking in EGR valve and cooler easily causes the decline of EGR efficient; Add diesel engine in order to improve power character, will adopt turbocharging technology basically, thereby catalyst converter mostly is arranged in its back, cause the temperature that enters catalyst converter lower, cause the chemical reactivity of catalyst converter to fail to be activated.Therefore, there are a large amount of hydrocarbons and carbon monoxide to discharge in this stage.So being controlled to of this stage effulent is important content.General measure is the close pressurized machine that catalyst converter is tried one's best, thereby improves the temperature that enters catalyst converter as much as possible.
For the discharging post-processing technology of diesel engine, have following several at present substantially: adopt oxidation catalytic converter to treatment of diesel exhaust, can reduce the discharge amount of HC and CO and the organic principle in the particle PM shape material; Reduce NO with EGR (exhaust gas recirculation) technology
XDischarging, perhaps utilize the selective reduction catalyst, reductive NO under the condition of excess oxygen
XCollect particulate material in the diesel exhaust gas etc. with particle filter.More and more strictness along with Abgasgesetz because egr system is aging faster, causes NO
XIncrease, and HC and the discharge amount of CO under the diesel engine low-temperature condition become the difficult point of Exhaust Control for Diesel Engine.
In sum, there is following technical problem in the prior art:
1, waste gas directly enters egr system, makes egr system coking, aging increasing the weight of, and performance sharply descends;
2, the pipeline of connection catalyst converter is very long, and thermal loss strengthens; Moreover waste gas will do work to pressurized machine, causes delivery temperature further to reduce;
3, catalyst converter applied catalysis technology is come purifying exhaust air, and when delivery temperature was lower than its active temperature, exhaust purification efficiency was very low.
Summary of the invention
The objective of the invention is to: one, reduce the dirt coking problem in EGR valve, cooler for recycled exhaust gas and the connecting pipeline; Two, make diesel engine reach higher emission level.
Specifically, the object of the present invention is to provide a kind of diesel engine exhausting after-treatment device and processing method thereof, increase the catalyst converter that volume is less in the pressurized machine front, also can make on the active temperature of delivery temperature at catalyst converter in the engine cold stage, enter before the EGR like this, waste gas is purified, and EGR is worn out slow down.
Further aim of the present invention is that when motor moved, exhaust gas temperature was very high under the high pulling torque operating mode, EGR is difficult for coking, but causes the inactivation of catalyst converter easily.Whether therefore, add a temperature transducer in the pressurized machine back, a three-way valve is added in the pressurized machine front, allow waste gas enter catalyst converter before the pressurized machine thereby can regulate according to different temperature.The final efficient effect that realizes EGR and catalyst converter simultaneously.
Concrete technological scheme is as follows:
A kind of diesel engine exhausting after-treatment device comprises one first catalyst converter, turbosupercharger, and this first catalyst converter is arranged on the gas exhaust manifold that turbosupercharger is communicated with diesel engine before, and this first catalyst converter opposite side is communicated with turbosupercharger backward.
Also comprise a three-way valve, this three-way valve one side is communicated with gas exhaust manifold, and opposite side is communicated with first catalyst converter or directly is communicated with turbosupercharger, and in order to the blast air of control gas exhaust manifold to first catalyst converter or directly flow to turbosupercharger.
Also comprise an exhaust gas recirculation cooler for recycled exhaust gas, the one side is connected to gas exhaust manifold by the three-way valve and/or the first catalyst converter place pipeline, and opposite side connects the intake manifold of diesel engine.
Also comprise an EGR valve, described exhaust all enters or does not enter cooler for recycled exhaust gas via this EGR valve control.
Also comprise a temperature transducer, it is arranged on after the turbosupercharger.
Temperature transducer communication or be electrically connected engine electric-controlled unit ECU and transmit detected delivery temperature to it, described engine electric-controlled unit ECU is according to the switch of the individual channel of the delivery temperature control three-way valve that obtains.
Also comprise one second catalyst converter, it is arranged on after the turbosupercharger.
Also comprise a temperature transducer, it is arranged on after the turbosupercharger, and described second catalyst converter further is arranged on after this temperature transducer.
The processing method of above-mentioned diesel engine exhausting after-treatment device, adopt following steps: diesel engine under cold start, or under running on the lower load such as idling,
(1) temperature transducer detection delivery temperature is lower, and Engine ECU directly acts on three-way valve after receiving this signal, forces waste gas through first catalyst converter;
(2) afterwards, part waste gas enters cooler for recycled exhaust gas according to the ECU signal by the EGR valve, and residual gas enters pressurized machine.
The processing method of above-mentioned diesel engine exhausting after-treatment device, adopt following steps: when the high load working condition of diesel engine moves down,
(3) it is higher that temperature transducer detects delivery temperature, and feed back to Engine ECU, and Engine ECU control three-way valve is closed the path of first catalyst converter;
(4) afterwards, part waste gas enters cooler for recycled exhaust gas according to the ECU signal by the EGR valve, and residual gas enters pressurized machine.Compare the present invention with present prior art:
1, slowed down the problem of aging of EGR.
2, more than the Ou Si emission standard, the discharging of diesel engine under cold start accounts for 70% of whole circulation operating mode discharging greatly, therefore, changes the performance and the position of present catalyst converter, can control the discharging of this part in a large number.
Description of drawings
Fig. 1 is an overview of the present invention
Among the figure:
1, cylinder 2, gas exhaust manifold 3, three-way valve 4, catalyst converter 5, EGR valve 6, cooler for recycled exhaust gas 7, pressurized machine 8, temperature transducer 9, catalyst converter
Embodiment
Describe the present invention with reference to the accompanying drawings below, it is a kind of preferred embodiment in the numerous embodiments of the present invention.
Shown in following accompanying drawing, be right after a three-way valve 3 and a catalyst converter 4 above the gas exhaust manifold, be pressurized machine 6 and temperature transducer 8 afterwards.In the pressurized machine back is another catalyst converter 9.
Diesel engine is under cold start, perhaps under running on the lower load such as idling, the detected delivery temperature of temperature transducer is lower, after the ECU of motor receives this signal, directly act on three-way valve 3, force waste gas through catalyst converter 4, the exhaust gas temperature that enter catalyst converter 4 this moment can make it reach high transformation efficiency fully, the discharging of HC, CO and unburned dissolved organic matter is a large amount of to be reduced thereby make, and satisfies stricter Abgasgesetz.Make also simultaneously that to enter the waste gas of egr system by EGR valve 5 cleaner relatively, be not easy to cause the coking of RGR system.When moving under the high load working condition of diesel engine, temperature transducer 8 will feed back to the signal of the very high row's temperature of ECU this moment, be closed the path of catalyst converter 4 at this moment by three-way valve 3, make waste gas directly enter pressurized machine 7.Because the delivery temperature of this moment is very high, during waste gas process catalyst converter 9, this catalyst converter also has the ability HC, CO and dissolved organic matter oxidizing fire are fallen fully.
Present embodiment mainly gets down to improve and enters the temperature of catalyst converter, and egr system is aging to be alleviated and make, and catalyst converter reaches desirable transformation efficiency simultaneously.Because diesel engine is when just starting, delivery temperature also can reach more than 150 °, and present catalyst technology, its initiation temperature is in 150-180 ° scope, and therefore, this temperature can make catalyst converter reach higher transformation efficiency fully.
For LD-diesel, all will use high pressure EGR and pressurized machine technology at present basically, and catalyst converter is arranged in the back of pressurized machine.Cause like this: 1, waste gas directly enters egr system, makes egr system coking, aging increasing the weight of, and performance sharply descends; 2, the pipeline of connection catalyst converter is very long, and thermal loss strengthens; Moreover waste gas will do work to pressurized machine, causes delivery temperature further to reduce.And catalyst converter applied catalysis technology is come purifying exhaust air, and when delivery temperature was lower than its active temperature, exhaust purification efficiency was very low.
Therefore, present embodiment increases the catalyst converter that volume is less as mentioned above in the pressurized machine front, also can make on the active temperature of delivery temperature at catalyst converter in the engine cold stage, enters like this before the EGR, and waste gas is purified, and EGR is worn out slow down.When motor moved under the high pulling torque operating mode, exhaust gas temperature was very high, and EGR is difficult for coking, but caused the inactivation of catalyst converter easily.Whether therefore, add a temperature transducer in the pressurized machine back, a three-way valve is added in the pressurized machine front, allow waste gas enter catalyst converter before the pressurized machine thereby can regulate according to different temperature.The final efficient effect that realizes EGR and catalyst converter simultaneously simultaneously adds a three-way valve in first catalyst converter front, arranges an exhaust gas temperature sensor in the pressurized machine back, is decided the trend of waste gas by the temperature of this sensor feedback.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technological scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (10)
1. diesel engine exhausting after-treatment device, it is characterized in that, comprise one first catalyst converter (4), turbosupercharger (7), this first catalyst converter (4) is arranged on the gas exhaust manifold (2) that turbosupercharger (7) is communicated with diesel engine before, and this first catalyst converter (4) opposite side is communicated with turbosupercharger (7) backward.
2. diesel engine exhausting after-treatment device as claimed in claim 1, it is characterized in that, also comprise a three-way valve (3), these three-way valve (3) one sides are communicated with gas exhaust manifold (2), opposite side is communicated with first catalyst converter (4) or directly is communicated with turbosupercharger (7), and in order to the blast air of control gas exhaust manifold (2) to first catalyst converter (4) or directly flow to turbosupercharger (7).
3. diesel engine exhausting after-treatment device as claimed in claim 2, it is characterized in that, also comprise a cooler for recycled exhaust gas (6), the one side is connected to gas exhaust manifold (2) by three-way valve (3) and/or first catalyst converter (4) place pipeline, and opposite side connects the intake manifold of diesel engine.
4. diesel engine exhausting after-treatment device as claimed in claim 3 is characterized in that, also comprises an EGR valve (5), and described exhaust all enters or do not enter cooler for recycled exhaust gas (6) via this EGR valve (5) control.
5. as each described diesel engine exhausting after-treatment device among the claim 2-4, it is characterized in that also comprise a temperature transducer (8), it is arranged on turbosupercharger (7) afterwards.
6. diesel engine exhausting after-treatment device as claimed in claim 5, it is characterized in that, temperature transducer (8) communication or be electrically connected engine electric-controlled unit ECU and transmit detected delivery temperature to it, described engine electric-controlled unit ECU is according to the switch of the individual channel of the delivery temperature control three-way valve (3) that obtains.
7. as claim 1-4, each described diesel engine exhausting after-treatment device in 6 is characterized in that also comprise one second catalyst converter (9), it is arranged on turbosupercharger (7) afterwards.
8. diesel engine exhausting after-treatment device as claimed in claim 7 is characterized in that, also comprises a temperature transducer (8), and it is arranged on turbosupercharger (7) afterwards, and described second catalyst converter (9) further is arranged on this temperature transducer (8) afterwards.
9. as the processing method of diesel engine exhausting after-treatment device as described in the claim 1-8, it is characterized in that, adopt following steps: diesel engine under cold start, or under running on the lower load such as idling,
(1) temperature transducer (8) detection delivery temperature is lower, after Engine ECU is received this signal, directly acts on three-way valve (3), forces waste gas through first catalyst converter (4);
(2) afterwards, part waste gas enters cooler for recycled exhaust gas (6) according to the ECU signal by EGR (5) valve, and residual gas enters pressurized machine (7).
10. as the processing method of diesel engine exhausting after-treatment device as described in the claim 1-8, it is characterized in that, adopt following steps: when the high load working condition of diesel engine down during operation,
(3) it is higher that temperature transducer (8) detects delivery temperature, and feed back to Engine ECU, the path that Engine ECU control three-way valve (3) is closed first catalyst converter (4);
(4) afterwards, part waste gas enters cooler for recycled exhaust gas (6) according to the ECU signal by EGR (5) valve, and residual gas enters pressurized machine (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910251449A CN101709662A (en) | 2009-12-21 | 2009-12-21 | Diesel engine exhausting after-treatment device and treatment method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910251449A CN101709662A (en) | 2009-12-21 | 2009-12-21 | Diesel engine exhausting after-treatment device and treatment method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101709662A true CN101709662A (en) | 2010-05-19 |
Family
ID=42402467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910251449A Pending CN101709662A (en) | 2009-12-21 | 2009-12-21 | Diesel engine exhausting after-treatment device and treatment method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101709662A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410091A (en) * | 2010-09-20 | 2012-04-11 | 万国引擎知识产权有限责任公司 | Device and method for protecting tail gas recycle valve from scaling |
| CN102947567A (en) * | 2010-06-21 | 2013-02-27 | 斯堪尼亚商用车有限公司 | Method and device pertaining to limiting the temperature of a dosing unit in a SCR system |
| CN102947568A (en) * | 2010-06-21 | 2013-02-27 | 斯堪尼亚商用车有限公司 | Method and device pertaining to limiting the temperature of an HC dosing unit in an exhaust system |
| CN104791146A (en) * | 2015-03-18 | 2015-07-22 | 中国重汽集团济南动力有限公司 | Gas inlet and exhausting system of internal combustion engine |
| CN106536893A (en) * | 2014-08-19 | 2017-03-22 | 川崎重工业株式会社 | Saddled vehicle |
| CN106948955A (en) * | 2015-12-11 | 2017-07-14 | 现代自动车株式会社 | The apparatus and method for purifying waste gas |
| US11624333B2 (en) | 2021-04-20 | 2023-04-11 | Kohler Co. | Exhaust safety system for an engine |
-
2009
- 2009-12-21 CN CN200910251449A patent/CN101709662A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102947567A (en) * | 2010-06-21 | 2013-02-27 | 斯堪尼亚商用车有限公司 | Method and device pertaining to limiting the temperature of a dosing unit in a SCR system |
| CN102947568A (en) * | 2010-06-21 | 2013-02-27 | 斯堪尼亚商用车有限公司 | Method and device pertaining to limiting the temperature of an HC dosing unit in an exhaust system |
| CN102410091A (en) * | 2010-09-20 | 2012-04-11 | 万国引擎知识产权有限责任公司 | Device and method for protecting tail gas recycle valve from scaling |
| CN106536893A (en) * | 2014-08-19 | 2017-03-22 | 川崎重工业株式会社 | Saddled vehicle |
| CN106536893B (en) * | 2014-08-19 | 2019-05-14 | 川崎重工业株式会社 | The saddle-type vehicles |
| CN104791146A (en) * | 2015-03-18 | 2015-07-22 | 中国重汽集团济南动力有限公司 | Gas inlet and exhausting system of internal combustion engine |
| CN106948955A (en) * | 2015-12-11 | 2017-07-14 | 现代自动车株式会社 | The apparatus and method for purifying waste gas |
| CN106948955B (en) * | 2015-12-11 | 2020-12-15 | 现代自动车株式会社 | Device and method for purifying exhaust gases |
| US11624333B2 (en) | 2021-04-20 | 2023-04-11 | Kohler Co. | Exhaust safety system for an engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101709662A (en) | Diesel engine exhausting after-treatment device and treatment method thereof | |
| US8205449B2 (en) | Internal combustion engine and control system for internal combustion engine | |
| CN103423002B (en) | Evacuating air sprays | |
| CN102191981B (en) | Targeted particular matter filter regeneration system | |
| US8931255B2 (en) | Techniques for raising exhaust temperatures | |
| EP2123875B1 (en) | Exhaust purification apparatus for compression-ignition internal combustion engine | |
| CN209892306U (en) | Exhaust temperature lifting device and tail gas treatment device | |
| CN107060967A (en) | Method and apparatus for the internal combustion engine of controller control to exhaust after treatment system | |
| US8601797B2 (en) | Exhaust device for diesel vehicle | |
| CN211819579U (en) | Diesel engine and aftertreatment system thereof | |
| CN102562233A (en) | Engine waste gas aftertreatment system | |
| CN103732873B (en) | The Exhaust gas purifying device of internal-combustion engine | |
| JP2009019556A (en) | Exhaust emission control device | |
| CN102128072B (en) | Engine exhaust system and operational approach | |
| CN211598859U (en) | Exhaust system of engine and engine | |
| CN113513392A (en) | Active hot patching type aftertreatment system | |
| CN103382885A (en) | Large-scale engine SCR denitration method and system | |
| CN105422292A (en) | Method of controlling an engine system | |
| CN201902256U (en) | Engine exhaust post-treatment system | |
| CN218717075U (en) | Automobile exhaust treatment device, automobile exhaust emission device, engine and automobile | |
| WO2015074386A1 (en) | Air injection system for reducing pollutant emission | |
| WO2010123411A1 (en) | Method and arrangement for recirculation of exhaust gases of a combustion engine | |
| CN104033213A (en) | Engineering machinery and DPF regeneration system thereof | |
| CN102933826B (en) | Exhaust pipe injection control device | |
| CN206513421U (en) | A kind of discharge post-treatment system applied to petrol engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100519 |