CN102767412A - Distribution valve for pressure operation of exhaust system - Google Patents
Distribution valve for pressure operation of exhaust system Download PDFInfo
- Publication number
- CN102767412A CN102767412A CN2012101356705A CN201210135670A CN102767412A CN 102767412 A CN102767412 A CN 102767412A CN 2012101356705 A CN2012101356705 A CN 2012101356705A CN 201210135670 A CN201210135670 A CN 201210135670A CN 102767412 A CN102767412 A CN 102767412A
- Authority
- CN
- China
- Prior art keywords
- reducing agent
- valve
- pressurized air
- described device
- mixing chamber
- 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.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1808—Pressure
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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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention relates to a device for reducing NOx in exhaust gas of an internal combustion engine with an exhaust system (28). A reducing agent (50) processed is added into the exhaust system in a spray way (3). A mixture valve (40) operated by the pressure of the reducing agent (50) is arranged in a weighting unit (24) loaded by compressed air (52) and the reducing agent (50).
Description
Technical field
The present invention relates to a kind of pressure-operated distributing valve that is used for vent systems.
Background technique
WO 02/079616 A1 relates to a kind of device that is used for the waste gas of internal-combustion engine is carried out reprocessing.Use especially urea urea-water-solution in other words of the reducing agent remain to be joined in the waste gas for this reason.Said device comprises mixing chamber; Can add and pressurized air can add through compressed air line and is used to produce reducing agent-air mixture through the reducing agent pipeline at reducing agent described in this mixing chamber, and in said compressed air line, be provided with safety check in order to prevent that reducing agent or reducing agent-air mixture are back to the compressed air line from mixing chamber.This safety check has resilient seal tube, and wherein said seal tube allows pressurized air to flow to the mixing chamber of said mixing chamber from compressed air line to the compressed air line on-load pressure time and prevents that reducing agent or reducing agent-air mixture from flowing to the compressed air line from the pressure chamber when carrying out opposite pressure-loaded.Said seal tube is configured to receive the structure of spring load.In said seal tube, insert the body of the valve be used for reducing agent is measured.In addition, said seal tube is joined in the hole of matrix of said mixing chamber.Spring load carries out on the end of the valve body dorsad of said seal tube.
For the nitrogen oxides in the exhaust flow that can reduce diesel engine (NOx), the urea-water-solution (urea liquid or other reducing agent) of liquid state is ejected in the exhaust system of internal-combustion engine through metering unit with pressure.Said metering unit directly is placed on the outlet pipe for this reason.For the durable system of the higher conversion ratio that obtains to have nitrogen oxides, need urea-water-solution well be mixed with waste gas.Pressurized air is available in some application schemes, for these application schemes, air is used for the atomizing of holding reductant, can produce thinner spraying with need not compressed-air actuated application scheme comparing thus.In order to insert pressurized air, need be used for to turn off air stream, so that such as turning off the idle running that prevents storage tank under the situation with the valve of electric means conversion usually.
Summary of the invention
By the present invention, this task is resolved in the following manner, will through be used for reducing agent be used for reducing agent is flowed to pressure that the conveying unit of metering unit produces be used to handle and be used for pressurized air and connect the distributing valve that inserts in other words.Can save the assembly of the costliness of the stop valve of handling with electric means thus, exist in addition with said metering unit make the possibility of compact structure more, thereby can reduce its locational space demand.
The present invention based on a kind of advantageous embodiment of design in; Can be in the inside of said metering unit or outside on said reducing agent input mechanism, arrange one can deflection element; Such as diaphragm, this diaphragm is handled the valve element of mixing valve and the pressure of the reducing agent that stands on the other hand in said reducing agent input mechanism, to exist on the one hand.Through said form such as diaphragm can deflection element; Can the valve element be regulated from its valve seat through the transmission component of handle or tappet or other moulding, thereby come to discharge more or less compressed air line through the deflection of this diaphragm just through the existence of the pressure in the said reducing agent intake line.According to the size of pressure, the compressed-air actuated flow cross section that is used for that discharges through the said valve element that from valve seat, regulates becomes big or diminishes.The said mixing valve of handling through the diaphragm that is carried out pressure-loaded by reducing agent comprises one such as the spring element that is configured to draught spring; Thereby in the reducing agent input mechanism, do not have the pressure that under the situation that does not have reducing agent, guarantees in other words under the situation of pressure in the said reducing agent intake line, so as with the valve element regulation of said mixing valve in its valve seat and the sealing of pressurized air intake line.
Handling through reducing agent pressure under the situation of mixing valve; Discharge the valve seat of said mixing valve according to the size of reducing agent pressure; Thereby flow to mixing chamber from the pressurized air in the compressed air reservoir through the pressurized air intake line of opening now on the one hand, load reducing agent through metering valve to said mixing chamber in addition.Therefore reducing agent and pressurized air are run into together and are flowed to atomising mechanism in said mixing chamber.Through said atomising mechanism; The premixed mixture that is made up of pressurized air and reducing agent becomes spraying and sprays mist in other words in said mixing chamber, thereby can be ejected in the exhaust system of internal-combustion engine through metering valve through the in other words reducing agent-air mixture of atomizing of metering valve with FINE DISTRIBUTION.
Through the solution that proposes by the present invention of the said mixing valve of handling through the pressure of reducing agent, be that the reducing agent pressure-loaded of input part of conveying unit of pump just will import to from the pressurized air of compressed air reservoir in the said mixing chamber in mixing chamber the time from preferable configuration only.Therefore, through the solution that proposes by the present invention, can avoid independent valve with the electric means conversion.Because carry unit, so cause through this conveyings unit and be used to trigger mixing valve with the pressurized air mixing at the pressure that on the pressure side produces in order reducing agent to be transported out original just must the use from the reducing agent storage tank.The present invention is with low cost and save structure space thus.
Description of drawings
Describe the present invention by means of accompanying drawing below.Accompanying drawing illustrates as follows:
Fig. 1 is the schematic representation of exhausted gas post-processing system together with its primary clustering; And
Fig. 2 is the metering unit that is used to form by mixing valve of the present invention reducing agent-air mixture, and said mixing valve is handled through the pressure of reducing agent.
Embodiment
Fig. 1 has illustrated the assembly of the exhausted gas post-processing system that is particularly useful in the waste gas of internal-combustion engine, carrying out the NOx reduction with schematic representation.
The exhausted gas post-processing system 10 that is particularly useful for the NOx in the waste gas of internal-combustion engine is reduced comprises reducing agent storage tank 12, in this reducing agent storage tank 12, is storing the deposit of reducing agent.Said reducing agent is such as being urea or urea-water-solution (HWL).Delivery line 14 extends to the conveying unit 16 that especially is configured to pump from said reducing agent storage tank 12.The suction side of this conveying unit 16 identifies through reference character 18, on the pressure side the discerning through reference character 20 of this conveying unit 16.
Through said conveying unit 16 reducing agent is flowed to metering unit schematically illustrated in Fig. 1 24 through delivery line 14 from said reducing agent storage tank 12.
In compressed air reservoir 22, stored pressurized air, said pressurized air can delivery be given said metering unit 24 through compressed air line 26 equally under the needs situation.Said metering unit 24 is such as directly being arranged on the said vent systems 28.Through said metering unit 24; To comprise thin reducing agent spraying 30 of dripping and join in the exhaust system of internal-combustion engine, reducing agent spraying 30 mixes mutually with waste gas mobile in vent systems 28 and reduces the NOx constituent element in this waste gas and it is decomposed into N in said exhaust system
2And H
2O.
From by the section that can find out metering unit the schematic representation of Fig. 2, at this on the one hand to this metering unit being loaded reducing agent and loading pressurized air to it on the other hand.
As can be from finding out the schematically illustrated sectional drawing by Fig. 2, reducing agent 50 flows to said metering unit 24 through reducing agent input mechanism 32.The reducing agent 50 that flows to metering unit 24 is under the pressure, on the pressure side exists said pressure on 20 at said conveying unit 16 basically.This pressure is carried in the body of said metering unit 24-ordinary construction be pipeline-reducing agent input mechanism 32 in.In addition, through pressurized air input mechanism 36, pressurized air 52 is present in said metering unit 24 places equally.
From by can learning the sectional drawing of Fig. 2, pressurized air 50 be present in mixing valve 40 such as on the valve element 54 that is configured to taper, this valve element 54 is adjusted in the schematic representation by Fig. 2 in its valve seat 58.The geometrical shape of certain said valve member 54 also can be the shape that is different from taper.Mixing valve 40 in the said housing that is integrated into metering unit 24 comprises a diverter element 34 such as the form that is configured to diaphragm that can deflection.This diverter element 34 pressure through the reducing agent 50 that in said reducing agent input mechanism 32, exists on the one hand loads and handles the said valve member 54 that in the schematic representation by Fig. 2, is configured to taper through a tappet that extends through cavity 42 or valve rod 56 or like on the other hand.The valve rod 56 of said mixing valve 40 element encompasses that is reset, relatively a upper/lower positions 38.These reposition element 38 preferable configuration are spring; Especially be configured to draught spring and so design; Thereby guarantee also when in said reducing agent input mechanism 32, lacking pressure that said valve element 54 closes in its valve seat 58, that is to say to stop pressurized air 50 to overflow in the mixing chamber 46 through pressurized air input mechanism 36.
In the downstream of said valve seat 58, the housing that pipeline passes said metering unit 24 extends, and this pipeline imports in the mixing chamber 46.On the other hand; Said mixing chamber 46 is connected with said reducing agent input mechanism 32 through the remittance mouth of metering valve 44, thereby pressurized air 52 flow in the said mixing chamber 46 and pressurized air 52 flow in the mixing valve of opening thus 40 when in said reducing agent input mechanism 32, having reducing agent.
In case said conveying unit 16 has begun to carry reducing agent 50, in said delivery line 14, rise, thereby the internal pressure at metering unit 24 also rises in said reducing agent input mechanism 32 at 20 the downstream pressure on the pressure side of carrying unit 16.Rise through pressure, the diverter element 34 of said preferably diaphragm deflects in the said cavity 42, make said valve rod 56 or other driving component basically along continuous straight runs towards said valve member 54 deflections and open valve seat 58.In case this valve seat 58 is opened, pressurized air 52 just flow into the said mixing chamber 46 from said pressurized air input mechanism 56, and same reducing agent 50 arrives in the said mixing chamber 46 through the said metering valve 44 that is arranged in the metering unit 24.
Reducing agent-pressurized air-mixture flows to unshowned atomizer among Fig. 2 from mixing chamber 46 via joint 48; Thereby can produce reducing agent pressurized air spraying 30, finally can this reducing agent pressurized air spraying 30 be joined in the vent systems 28 of unshowned internal-combustion engine here (Fig. 1 more once).
The droplet that can produce in the inside of said reducing agent spraying 30 is thin more, and the NOx reduction that can realize is just effective more.
Realize this point through the said solution that proposes by the present invention, the valve that promptly can abandon being provided with separately with the electric means conversion in the inside of said metering unit 24; The said on the other hand mixing valve 40 that is in usually in the closing state just obtains activating when only when connecting said conveying unit 16 backs and reducing agent stream in said delivery line 14, occurs and therefore also in said reducing agent input mechanism 32, pressure occurring in metering unit 24 inside.Because only after dosage reducing agent 50, only need pressurized air 52 to be used for atomizing, so pressurized air stream and reducing agent stream are coupled.
In addition; From by finding out the schematic representation of Fig. 2; Said diverter element 34 during through the pressure deflection in the reducing agent input mechanism 32 said valve element 54 carry out deflection along opening direction 60; Thereby discharge said valve seat 58; And after cutting off said conveying unit 16 in said delivery line 14 and thus during the decline of the pressure in said reducing agent input mechanism 32 said valve element 54 turn back in the valve seat 58 such as the reposition element that is configured to spring element 38 through said, that is to say along closing direction 62 and move.
Claims (9)
1. be used for making the have vent systems device of NOx reduction of waste gas of internal-combustion engine of (28); Wherein reducing agent (50) is especially joined in the said vent systems with the form of spraying (30); It is characterized in that, in pressurized air (52) and metering unit (24), arranged the mixing valve of handling through the pressure of said reducing agent (50) (40) with reducing agent (50) loading.
2. by the described device of claim 1, it is characterized in that, said mixing valve (40) comprise can deflection element (34) especially can deflection diaphragm, said diaphragm obtains loading through reducing agent input mechanism (32).
3. by each described device in the aforementioned claim, it is characterized in that said element (34) that can deflection is valve member (54), this valve member (54) obtains loading through spring element (38) along closing direction (62).
4. by each described device in the aforementioned claim, it is characterized in that, in said reducing agent input mechanism (32) in the arranged downstream of said element (34) that can deflection metering valve (44).
5. by each described device in the aforementioned claim, it is characterized in that said metering valve (44) is ejected into reducing agent (50) in the mixing chamber (58).
6. by each described device in the aforementioned claim, it is characterized in that said mixing chamber (46) loads with pressurized air (52).
7. by each described device in the aforementioned claim, it is characterized in that the opening degree that the pressurized air of said mixing chamber (46) loads according to said mixing valve (40) carries out.
8. by each described device in the aforementioned claim, it is characterized in that said mixing valve (40) only when being transported to reducing agent (50) in the said metering valve (44), just is sent to pressurized air (52) in the said mixing chamber (46).
9. by each described device in the aforementioned claim, it is characterized in that said mixing chamber (46) has the joint (48) that is used for atomising mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011075446.6 | 2011-05-06 | ||
| DE102011075446A DE102011075446A1 (en) | 2011-05-06 | 2011-05-06 | Apparatus for reduction of nitrous oxides in exhaust gas of e.g. diesel engine, has mixing valve that is actuated by metering unit when reducing agent pressure acts on metering unit, to mix pressurized air and reducing agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102767412A true CN102767412A (en) | 2012-11-07 |
| CN102767412B CN102767412B (en) | 2017-05-17 |
Family
ID=47019455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210135670.5A Expired - Fee Related CN102767412B (en) | 2011-05-06 | 2012-05-04 | Distribution valve for pressure operation of exhaust system |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN102767412B (en) |
| DE (1) | DE102011075446A1 (en) |
| FR (1) | FR2974846B1 (en) |
| IN (1) | IN2012DE01068A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2125064U (en) * | 1992-05-16 | 1992-12-16 | 李谦 | Oil and gas mixing valve |
| JP2001173431A (en) * | 1999-12-17 | 2001-06-26 | Isuzu Motors Ltd | Exhaust emission control system |
| DE19963394A1 (en) * | 1999-12-28 | 2001-07-05 | Bosch Gmbh Robert | Aerosol generator for exhaust processing in IC engines has secondary air supply elements for effective fluid-air-mixture generation and quicker aerosol transport |
| US20030041822A1 (en) * | 2001-08-23 | 2003-03-06 | Franz Pischinger | Piston internal combustion engine with pressure relief gas exhaust valves |
| US20040083723A1 (en) * | 2001-03-30 | 2004-05-06 | Bernhard Hager | Device for the post-treatment of exhaust gases of an internal combustion engine |
| CN1853040A (en) * | 2003-09-18 | 2006-10-25 | A.凯塞汽车系统有限公司 | Filter unit and valve for a fuel supply system |
| JP2008020039A (en) * | 2006-07-14 | 2008-01-31 | Toyota Motor Corp | Pressure control valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10040571A1 (en) * | 2000-08-18 | 2002-02-28 | Bosch Gmbh Robert | Device for producing a reducing agent-air mixture |
| EP1683967B1 (en) * | 2004-12-30 | 2007-11-21 | Grundfos NoNox a/s | Device for producing a mixture of reduding agent and air |
| ATE404780T1 (en) * | 2005-04-13 | 2008-08-15 | Grundfos Nonox As | MIXING DEVICE FOR MIXING UREA AND AIR |
| DE102007020965A1 (en) * | 2007-05-04 | 2008-11-06 | Robert Bosch Gmbh | Device for the metered injection of an exhaust gas aftertreatment agent-air mixture in an exhaust system |
-
2011
- 2011-05-06 DE DE102011075446A patent/DE102011075446A1/en not_active Withdrawn
-
2012
- 2012-04-09 IN IN1068DE2012 patent/IN2012DE01068A/en unknown
- 2012-05-03 FR FR1254042A patent/FR2974846B1/en not_active Expired - Fee Related
- 2012-05-04 CN CN201210135670.5A patent/CN102767412B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2125064U (en) * | 1992-05-16 | 1992-12-16 | 李谦 | Oil and gas mixing valve |
| JP2001173431A (en) * | 1999-12-17 | 2001-06-26 | Isuzu Motors Ltd | Exhaust emission control system |
| DE19963394A1 (en) * | 1999-12-28 | 2001-07-05 | Bosch Gmbh Robert | Aerosol generator for exhaust processing in IC engines has secondary air supply elements for effective fluid-air-mixture generation and quicker aerosol transport |
| US20040083723A1 (en) * | 2001-03-30 | 2004-05-06 | Bernhard Hager | Device for the post-treatment of exhaust gases of an internal combustion engine |
| US20030041822A1 (en) * | 2001-08-23 | 2003-03-06 | Franz Pischinger | Piston internal combustion engine with pressure relief gas exhaust valves |
| CN1853040A (en) * | 2003-09-18 | 2006-10-25 | A.凯塞汽车系统有限公司 | Filter unit and valve for a fuel supply system |
| JP2008020039A (en) * | 2006-07-14 | 2008-01-31 | Toyota Motor Corp | Pressure control valve |
Also Published As
| Publication number | Publication date |
|---|---|
| IN2012DE01068A (en) | 2015-07-31 |
| DE102011075446A1 (en) | 2012-11-08 |
| FR2974846B1 (en) | 2016-08-19 |
| FR2974846A1 (en) | 2012-11-09 |
| CN102767412B (en) | 2017-05-17 |
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