CN104350251A - Injection system, metering pump, exhaust gas treatment device, method - Google Patents
Injection system, metering pump, exhaust gas treatment device, method Download PDFInfo
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- CN104350251A CN104350251A CN201380028295.7A CN201380028295A CN104350251A CN 104350251 A CN104350251 A CN 104350251A CN 201380028295 A CN201380028295 A CN 201380028295A CN 104350251 A CN104350251 A CN 104350251A
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- Prior art keywords
- joint
- piston
- ejecting system
- valve
- storage tank
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Classifications
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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
- 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
- F01N3/24—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 constructional aspects of converting 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
- 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]
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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
- 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]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1433—Pumps
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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
- 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
-
- 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
- F01N2610/1466—Means for venting air out of conduits or tanks
-
- 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
- F01N2610/1486—Means to prevent the substance from freezing
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/85978—With pump
- Y10T137/85986—Pumped fluid control
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)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to an injection system (2) for metered injection of a fluid, particularly for an exhaust gas treatment device (1) in a motor vehicle, said system having: a tank (3) for storing the fluid; a metering valve (19); an actuatable venting valve (25) for admitting gas into or releasing gas from the injection system (2); and a metering pump (7) which is connected to the tank (3) and the metering valve (19) in order to convey the fluid from the tank (3) to the metering valve (19). The metering pump (19) is designed as a piston pump (8) and has a piston (10) axially movable in a cylinder (9) between an upper and a lower dead centre and forming, together with the cylinder (9), a pump chamber (12). Associated with the pump chamber (12), the cylinder (9) has a first connection (14) which is connected to the tank (3) via a tank line (6), a second connection (17) which is connected to the metering valve (19) via a conveying line (18), and a third connection (23) which is connected to the venting valve (25) via a venting line (24). The invention further relates to a metering pump and an exhaust gas treatment system. The invention additionally relates to a method for operating a corresponding injection system.
Description
Technical field
The present invention relates to a kind of ejecting system, for dosage ground atomizing of liquids, especially for the exhaust aftertreatment device of Motor Vehicle, described ejecting system has: storage tank, for storing liquid; Metering valve; Steerable ventilation valve, flow in described ejecting system or from described ejecting system for making gas and flows out; Proportioning pump, described proportioning pump is connected with described storage tank and with described metering valve, liquid is delivered to described metering valve from described storage tank.
In addition, the present invention relates to a kind of corresponding proportioning pump and a kind of exhausted gas post-processing system.In addition, the present invention relates to a kind of method for running respective spray system.
Background technique
Ejecting system, proportioning pump, exhausted gas post-processing system and for run them method from known in the state of the art.In addition, due to the Abgasvorschriften that the coming years are strict gradually, must by pollutant NO in the Motor Vehicle with internal-combustion engine
xreduce.The method of frequent use is SCR method (SCR=selective catalytic reduction), in the method, by means of the reducing agent of liquid state by pollutant NO
xbe reduced into nitrogen and water.At this, liquid thereby helps proportioning pump and is delivered to metering valve from storage tank, and described metering valve is configured to passive type or pressure control type injection valve usually.Proportioning pump measure described emitted dose and with the connection of injection valve in set up a pressure.If this pressure exceedes critical pressure, then injection valve is opened.Known ejecting system faces such problem: namely liquid exhaust after-treatment agent (especially urea-containing exhaust after-treatment agent) has the volume increase of about 10% when sporting solid state mutually by liquid state, and therefore all ejecting systems driven with this exhaust after-treatment agent all must be optimized in its anti-ice pressure property.In the ejecting system with steerable metering valve, proportioning pump can be made to be switched in its action direction and metering valve is opened simultaneously, thus by metering valve, gas or ambient air or waste gas can be introduced in ejecting system, and anti-ice pressure property can be guaranteed thus.But this is impossible in the pressure control type injection valve automatically opened and closed.
Related to the ejecting system starting described type by EP 2 151 559B1, mentioned problem will be overcome in described ejecting system, a ventilation valve is set between proportioning pump and metering valve, flow into for making gas and/or flow out described ejecting system.Depending on proportioning pump throughput direction and according to the on off state of ventilation valve, gas can be made to be incorporated in ejecting system to guarantee anti-ice pressure property at this, and drawn to fill by ejecting system but also with the exhaust after-treatment agent of liquid state afterwards, to guarantee functional within the short time of ejecting system.
Summary of the invention
The ejecting system according to the present invention with feature described in claim 1 has such advantage: the operative orientation reversing described proportioning pump there is no need.Therefore such as eliminate the braking on the opposite direction of the driving of described proportioning pump and restart operation.The substitute is, proportioning pump so constructs and is embedded in ejecting system, makes to utilize the simplest device to carry out atomizing of liquids or make gas introduce or discharge described ejecting system.Suggested according to the present invention for this reason, proportioning pump is configured to reciprocating pump, and described proportioning pump has in the cylinder can the piston of axial motion between upper dead center and lower dead centre, described piston forms pump chamber together with cylinder, wherein, the described cylinder of attaching troops to a unit in described pump chamber has: the first joint, and described first joint is connected with storage tank by storage tank pipeline; Second joint, described second joint is connected with described injection valve by delivery line; 3rd joint, described 3rd joint, described 3rd joint is connected with described ventilation valve by air pipeline.Therefore ventilation valve, dosage module and storage tank are directly connected with proportioning pump respectively.Because proportioning pump is configured to reciprocating pump, therefore this proportioning pump can regulate overvoltage or negative pressure according to the on off state of various valve in the respective branch of ejecting system.Thus it is possible that, without the need to making reciprocating pump interrupt when it runs, only described ejecting system need be filled with gas by regulating or handle described valve (particularly ventilation valve), to guarantee anti-ice pressure property, or gas is discharged, to make described ejecting system come into operation again.
Preferably define, the second connection part structure at cylinder towards in the end regions of upper dead center.Thus, described second connection part is in such region: this region make use of the maximum delivery volume of proportioning pump completely.Particularly preferably, the second joint is arranged in the described end regions on the side of cylinder.So this side is opposite to the piston area towards pump chamber of piston.Thus ensure that, liquid thereby a large amount of as far as possible helps reciprocating pump and be supplied to metering valve in a stroke of piston.
A favourable improvement project according to the present invention defines, the 3rd connection part structure at cylinder towards in the end regions of upper dead center.Ensure that equally by making the 3rd joint be arranged in end regions, reciprocating pump aspirates air a large amount of as far as possible when piston moves from upper dead center to lower dead centre and is then introduced into ejecting system.At this, the 3rd joint can be arranged on the side of cylinder, and described cylinder is same preferably at least to be constructed to essentially pot-shaped.But the 3rd joint is preferably configured in the shell wall of cylinder.
A favourable improvement project according to the present invention defines, and the moving direction along piston is observed, and the first joint is configured on the shell wall of cylinder between joint and the lower dead centre of piston the 3rd.Therefore, the first connection part is on the 3rd height between joint and the lower dead centre of piston.Which results in, piston is running through described first joint from lower dead centre to the path of upper dead center, thus described piston loses the connection of itself and pump chamber.First joint forms guiding valve in this respect together with piston, and described guiding valve is closed from a certain position between upper dead center and lower dead centre by piston.If piston runs in lower dead centre when ventilation valve cuts out, then this piston is by the first joint pumping liquid, as long as this piston runs exceed described first joint.As long as ventilation valve is closed, on the return path, the first joint is closed again and the liquid of piston is transported to dosage module from pump chamber.In order to ventilate or press property in order to ensure anti-ice, in next circulation, ventilation valve is opened.Thus, as long as piston moves from upper dead center towards the direction of lower dead centre, gas (such as ambient air or waste gas) flow in piston chamber.First joint is limit by geometrical shape and is just opened very late, thus is mainly full of air in pump chamber.When piston arrives lower dead centre, valve is closed again, thus the gas being arranged in pump chamber continues compressed and enter into the first joint when moving in the direction of piston towards upper dead center, thus, ejecting system is at least locally provided with gas and is ventilated in this respect on storage tank side.Once piston has run more than the first joint, then the pressure in pump chamber has risen further, until metering valve (this metering valve is preferably configured as pressure control type injection valve) is opened due to high pressure.Thus, the part of ejecting system in dosage module side also by ventilation of gases or clear liquid, and ensure that the anti-ice pressure property of whole ejecting system.
According to an alternative embodiment of the present invention, the first joint is configured on the side of cylinder equally.This has advantage: the greater amount gas for ventilating to ejecting system can be transported in the part on the storage tank side of ejecting system or be transported in storage tank pipeline, because whole piston stroke is available.
Particularly preferably be, then give first joint be equipped with an automatic suction valve, described suction valve piston towards lower dead centre direction motion time open and piston towards upper dead center direction move time at least substantially close.Thus, automatically opened and closed by suction valve and ensure that in guiding valve described above identical functional, wherein, employ the whole stroke of piston and then employ maximum delivered volume.
Particularly preferably, suction valve is configured to spring-loaded safety check.This safety check is batch production and low price in this respect.In addition, in this type of design, the piston stroke of reciprocating pump can be shortened and the respective examples electric drive of reciprocating pump can design less in size.Suction valve preferably so constructs, and this suction valve when air is arranged in pump chamber or carry out ventilation process is not closed completely in compression stroke (when namely moving to upper dead center when piston from lower dead centre).Proportioning pump usually can perform air stroke, until pipeline and proportioning pump are drained to storage tank.In contrast, if liquid is arranged in pump chamber (namely when the conventional operation of ejecting system), then described suction valve keeps closing.
According to an alternative mode of execution, be alternative in and be configured to spring-loaded safety check, suction valve is configured to diaphragm valve.The diaphragm of described diaphragm valve is advantageously made up of elastic material.Described diaphragm preferably has sealing frame, and described sealing frame is connected with the valve plate that center is arranged (constructing especially integratedly) by the radial contact pin extended.Described diaphragm preferably so constructs, and makes this diaphragm in liquid pumping process, close the first joint completely and not exclusively close the first joint in gas pump process.
Be alternative in and be configured to diaphragm valve and preferably define, suction valve is configured to the piston valve with integrated form flow controller.The working method with the piston valve of integrated form flow controller is similar to diaphragm valve and which kind of medium is transferred relevant working method to.If gas is pumped, then piston valve does not have or at least not exclusively closes the first joint.But if liquid is pumped, then piston valve closes the first joint completely, thus liquid can not be transferred and gets back in storage tank, then build a pressure in pump chamber, this pressure can make metering valve open if desired.
Favourable improvement project according to the present invention defines, and ventilation valve is connected with gas connection, and described gas connection is particularly configured to ambient air joint; Described gas connection is connected with the flue gas leading of Motor Vehicle, and described gas connection is configured to flue gas leading joint; Or described gas connection is connected with described storage tank, described gas connection is configured to vent connection.In the ventilation process of ejecting system, namely by or ambient air or waste gas or be incorporated in ejecting system from the gas in the storage tank of storage of liquids.Thus, the anti-ice pressure property of this ejecting system can be guaranteed with simple method and mode.
Particularly preferably be, between ventilation valve and gas connection, be connected with at least one hydrophobicity diaphragm.On the one hand, hydrophobicity diaphragm is simple flow controller and thus prevent: air outwards may be overflowed in the clear from system.On the other hand, hydrophobicity diaphragm prevents: a small amount of liquid (particularly in ventilation process) may outwards escape in environment.
Particularly preferably, at least one storage being used for liquid or gaseous medium is equipped with to hydrophobicity diaphragm.On the one hand, because hydrophobicity diaphragm has low throttling action, therefore this storage can be configured to air holder on the one hand for receiving additional air or gas.On the other hand, this storage can receive and flow through the liquid after hydrophobicity membrane filtration from air on a small quantity, and described liquid can not hinder hydrophobicity diaphragm thus in its gas permeability.Particularly advantageously, correspondingly on the both sides of hydrophobicity diaphragm storage is provided with.Storage such as can be configured to the flexible tube section of elastically deformable, thus the volume of described storage adapts to the amount of additional air or liquid.
Have being according to the advantage of proportioning pump of the present invention of feature described in claim 13, described proportioning pump need not be driven in different directions, runs to switch to ventilate from the conventional operation of ejecting system.For this reason, proportioning pump is configured to reciprocating pump, and described reciprocating pump has in the cylinder can the piston of axial motion between upper dead center and lower dead centre, described piston forms pump chamber together with cylinder, wherein, the described cylinder of attaching troops to a unit in described pump chamber has: the first joint, for the storage tank pipeline that can be connected with the storage tank of ejecting system; Second joint, for the pressure piping that can be connected with the injection valve of ejecting system; 3rd joint, for can be connected with ventilation valve, the air pipeline of ejecting system.Other advantage and feature are drawn by above-mentioned explanation.
What have feature described in claim 14 is ejecting system as above according to the feature of exhausted gas post-processing system of the present invention.Draw above-mentioned advantage thus.
Have feature described in claim 15, be according to the feature of the method for running described ejecting system of the present invention, in order to switch to the state of anti-ice pressure from the conventional operation of conveying liquid, piston continues run and according to the position of this piston, ventilation valve so opened and closed at least substantially as in conventional operation, and gas is introduced in ejecting system.Therefore, (such as electricity) driver of driven plunger is not affected on its operative orientation, and this (as discussed previously) result in the advantage in design size and in switch speed.Only ejecting system can need be made to perform ventilation and exhaust by handling described ventilation valve.Other advantage and feature are drawn by above-mentioned embodiment.
Accompanying drawing explanation
Following foundation accompanying drawing further illustrates the present invention.Show for this reason:
Fig. 1: for the first embodiment of the exhaust aftertreatment device of Motor Vehicle, described exhaust aftertreatment device has ejecting system;
Fig. 2: the second embodiment of exhaust aftertreatment device;
Fig. 3: the favourable improvement project of exhaust aftertreatment device;
Fig. 4 A and 4B: the first alternate embodiment of the suction valve of ejecting system;
Fig. 5: the second alternate embodiment of suction valve.
Embodiment
Fig. 1 illustrates the simplification diagram of the exhaust aftertreatment device 1 of the Motor Vehicle for not being shown specifically herein.In order to be incorporated in the waste gas streams of the internal-combustion engine of Motor Vehicle by the exhaust after-treatment agent containing ammonia, exhaust aftertreatment device has ejecting system 2.
Ejecting system 2 has storage tank 3, and described storage tank is used for the exhaust after-treatment agent 4 of storing liquid.Storage tank 3 is at utmost filled, and wherein, retains air cushioning portion 5 in this storage tank.By storage tank pipeline 6, storage tank 3 is connected with proportioning pump 7.Proportioning pump 7 is configured to reciprocating pump 8 and has the cylinder 9 of essentially pot-shaped for this reason, and in the cylinder, piston 10 is set to move axially between upper dead center and lower dead centre.Piston 10 is such as connected with connecting rod, this connecting rod by such as making the to-and-fro motion of piston 10 oscillating type by the bent axle of motoring, as by shown in double-head arrow 11.Piston 10 and cylinder 9 form pump chamber 12 jointly, and the volume of this pump chamber is changed by the motion of piston 10.Piston 10 is configured to solid piston in the case and abuts in hermetically on the internal surface of shell wall 13 of cylinder 9 with its shell outer surface.Also one or more seal ring can be set between piston 10 and cylinder 9 if desired.On the shell wall 13 of described cylinder, cylinder 9 has the first joint 14 be connected with storage tank pipeline 6.Joint 14 leads in the pump chamber 12 of reciprocating pump 8 above the lower dead centre of piston 10 or with this lower dead centre with having spacing, as shown in fig. 1.In storage tank pipeline 6, between storage tank 3 with proportioning pump 7, be connected a filter 15 and other parts 16 alternatively.At least one in these parts 16 such as can be configured to heating equipment.
Proportioning pump 7 has the second joint 17, and described second joint is connected with metering valve 19 by delivery line 18.Metering valve 19 attach troops to a unit in above-mentioned internal-combustion engine flue gas leading 20 and be configured to passive type injection valve 21, described passive type injection valve be stressed control open and close.In the present invention, injection valve 21 is configured to spring-loaded injection valve 21.In addition, between metering valve 19 and the second joint 17, additional safety check 22 is connected with.
In addition, proportioning pump 7 is had the 3rd joint the 23, three joint and is connected with ventilation valve 25 by air pipeline 24.Second joint 17 and the 3rd joint 23 both arrange or are configured in deviating from the end regions 26 of described piston 10 of cylinder 9.3rd joint 23 is passed in pump chamber 12 through shell wall 13 equally, and joint 17 is arranged on the closed or substantially closed side 27 of can-like cylinder 9.Therefore, the first joint 14 is axially between the lower dead centre and the 3rd joint 23 of piston 10.
In conventional operation, namely when the exhaust after-treatment agent 4 of liquid state will mix with the waste gas flowing through described flue gas leading 20, exhaust after-treatment agent 4 is drawn in pump chamber 12 via joint 14 by the piston 10 that the direction towards lower dead centre is run.Then, liquid is pushed into in the delivery line 18 of metering valve 19 by joint 17 by piston 10 on its path towards the direction of upper dead center, and described metering valve is opened when pressure is enough and exhaust after-treatment agent 4 is ejected in flue gas leading 20.At this, ventilation valve 25 always cuts out.
If ejecting system 2 is turned off, then must guarantee anti-ice pressure property (Eisdruckfestigkeit) of described ejecting system.This means, must prevent between the down period of ejecting system 2:---when described exhaust after-treatment agent is frozen in---exhausted gas post-processing system 2 damages because the volume of described exhaust after-treatment agent 4 increases.Be provided with in order to ensure described anti-ice pressure property, ejecting system 2 at least substantially emptying liquid state exhaust gas treating agent 4 and ventilate.As follows in this this process:
Once piston 10 leaves upper dead center, then ventilation valve 25 is opened.Ventilation valve 25 is connected with gas connection 27, and described gas connection is such as configured to ambient air joint.If ventilation valve 25 is opened, then this ventilation valve makes pressure chamber 12 be connected with ambient air thus.Thus, by opening described ventilation valve 25, piston 10 towards lower dead centre direction motion time ambient air be inhaled in pump chamber 12.At this, due to gas or the small flow resistance of ambient air, therefore in piston chamber, do not set up negative pressure.Alternately, gas connection 27 can be configured to flue gas leading joint and be connected with flue gas leading in this respect.Gas connection 27 can be configured to storage tank joint, and described storage tank joint is arranged in the region in air cushioning portion 5 on storage tank 3.Gas connection 27 being configured to the advantage that storage tank joint has is: the air of drawing from described storage tank is rich in ammonia if desired, thus prevent Crystallization thing to enter into this system when withdrawing air or when ventilating to ejecting system 2, otherwise described Crystallization thing may damage the function of such as ventilation valve 25.
Because joint 14 is passed in pump chamber 12 below joint 23 in the shell wall of cylinder 9, therefore joint 14 is used as guiding valve together with described piston 10.Once piston 10 moves through joint 14 towards the direction of lower dead centre, then joint 14 is released.Because joint 14 is limit by geometrical shape and just opened very late, therefore, first mainly gas or ambient air in pump chamber 12.This process is also so supported: compared with ambient air, and liquid exhaust after-treatment agent is had higher inertia towards during the direction motion of lower dead centre by throttling more strongly at piston 10.At this, safety check 22 keeps it cut out attitude and do not affect the situation in pump chamber 12 in this respect.
If piston 10 arrives lower dead centre, then ventilation valve 25 cuts out.Once piston 10 moves towards the direction of upper dead center again, then air enters into joint 14.Which results in, the liquid being arranged in storage tank pipeline 6 returns towards the direction of storage tank 3.If filter 15 arranges enough close to proportioning pump 7, then can be made until the storage tank pipeline 6 of filter 15 ventilates and clears liquid by the single stroke of piston 10.Otherwise this process is so often performed, until storage tank pipeline 6 desirably ventilates on degree ground.
Once piston 10 to the path of upper dead center through joint 14 or through this joint opening and therefore closed, then pressure in pump chamber 12 increases.Depending on the described volume of joint 14 and the adjustment of position, metering valve 19 by the ambient air of compression in pump chamber 12 or early or open behindhand.Thus, the liquid being arranged in delivery line 18 enter into flue gas leading 20 and make until metering valve 19 delivery line 18 and also make metering valve 19 self ventilate thus.
Advantageously, piston 10 has chamfering 29 on its piston area 28 towards side 17, thus gas can be made for longer periods to flow into or enter into storage tank pipeline 6 by joint 14 when the stroke motion of piston 10.
If ejecting system 2 puts into operation again, then this ejecting system must be vented or clears gas and fill with exhaust after-treatment agent 4.This can realize with simple method and mode equally by means of ejecting system 2 of the present invention.Once piston 10 leaves upper dead center, then ventilation valve 25 cuts out.Therefore, described negative pressure in pump chamber 12, produces negative pressure, so will be arranged in the air suction of ejecting system by joint 14.If piston moves towards the direction of upper dead center again from lower dead centre, then ventilation valve 25 is opened again and the air being arranged in pump chamber 12 is got back to environment by joint 23 conveying.
Fig. 2 shows another embodiment of exhaust aftertreatment device 1 or ejecting system 2.The identical reference mark of element known from Fig. 1 indicates, thus with reference to above-mentioned explanation in this respect.Substantially only difference should be discussed below.
In the embodiment in figure 1, joint 14 is passed in pump chamber 12 by shell wall 13 or is passed in cylinder 9, and described joint is arranged on the side of cylinder 9 according to the present embodiment (Fig. 2).Because joint 14 now no longer can, with piston 10 as guiding valve acting in conjunction, be equipped with suction valve 30 therefore to joint 14.In the present embodiment, suction valve 30 is configured to spring-loaded safety check 31.If piston 10 is (namely towards the direction of lower dead centre) operation down, then suction valve 30 is automatically opened, as long as there is certain negative pressure in pump chamber 12.In conventional operation, ventilation valve 25 cuts out.When piston 10 runs upward, safety check 22 cuts out due to the cracking pressure through regulating on metering valve 19.Meanwhile, suction valve 30 is opened due to the negative pressure now produced in pump chamber 12.Suction valve 30 can have very soft spring.Piston 10 is arrived lower dead centre and then starts to compress the liquid aspirated by suction valve 30.Described suction valve 30 is closed and safety check 22 is opened, thus liquid is pushed towards the direction of passive type injection valve 21, and described passive type injection valve is opened when it exceedes activation pressure and exhaust after-treatment agent is ejected in flue gas leading 20.
In ventilation runs, ventilation valve 25 is opened when piston 10 moves down, thus gas can flow in pump chamber 12.Between suction valve 25 and storage tank 3, ventilation valve 25 liquid column principle is over there air column.Due to inertia and the particularly friction of this liquid on the tube wall of respective line of liquid, therefore piston 10 towards during the direction motion of lower dead centre by described ventilation valve 25 by air (with liquid unlike, described air on tube wall without friction) be drawn in cylinder 10 or pump chamber 12.Adjusted by corresponding throttling, described behavioral trait can be promoted further.
Due to the wall friction of the exhaust after-treatment agent 4 of dead volume (Totvolumina) and liquid or liquid state reason advantageously, ventilation valve 25 is arranged on and is close to cylinder 9 as far as possible.If piston 10 has arrived its lower dead centre, then ventilation valve 25 has cut out until piston 10 arrives again its upper dead center.Therefore, the air accumulated in pump chamber 12 is pressed in ejecting system 12 or in storage tank pipeline 6 by the direction of described suction valve 30 towards storage tank 3.At this, suction valve 30 is so implemented, and make described suction valve not close in air compressing stroke or at least not exclusively close, and described suction valve (when only liquid is arranged in pump chamber 12) in conventional operation is closed completely.In this case, maintenance is also closed by safety check 22 and injection valve 21.Depending on piston stroke height, proportioning pump 7 correspondingly must perform multiple air stroke, until storage tank pipeline 6 and proportioning pump 7 to storage tank 3 are drained.In this case, piston 10 is advantageously configured to do not have chamfering 29, to improve the efficiency of this proportioning pump 7.In addition, with previous embodiment unlike, another filter 32 is arranged in storage tank 3, and another filter described is connected to the upstream of described storage tank pipeline 6.Ejecting system 2 of the present invention has such advantage: the total travel of piston 10 may be used for suction and sprays the exhaust after-treatment agent 4 of described liquid state and enter into storage tank pipeline 6 and/or delivery line 18 for ordering about gas.
Piston must be configured to solid piston according in first embodiment of Fig. 1, and described piston also can be configured to the diaphragm of elastically deformable as in the case of the embodiment according to fig. 2, thus proportioning pump 7 is configured to reciprocating pump 8, described reciprocating pump has deformable piston or diaphragm pump.This efficiency is corresponding to the reciprocating pump 8 described.The configuration that unique reference claim 14 is configured to guiding valve is impossible by means of diaphragm pump, thus this mode of execution can not realize or realize very difficult in a first embodiment.
Fig. 3 illustrates the favourable improvement project of the ejecting system 2 according to Fig. 2.Certainly, this improvement project but also can arrange in the embodiment in accordance with fig. 1.By the known element identical reference character sign of accompanying drawing above, thus in this respect can with reference to description above.
Favourable improvement project in Fig. 3 relates to gas connection 27.If by ventilation valve 25 ventilate run time from waste gas or environment intake-gas, then due to obvious Crystallization thing may be formed on the base of ventilation valve 25 from the ammonia of exhaust after-treatment agent and the contact of fresh air.In addition, may be blown in environment by the air of enriched ammonia when ejecting system 2 ventilates, this may cause offensive odour.
In order to avoid this situation, between gas connection 27 and ventilation valve 25, be connected with hydrophobicity diaphragm 32 according to the present invention.On the one hand, hydrophobicity diaphragm 32 is little flow controller and prevents: air or gas outwards may be overflowed in the clear from ejecting system 2.On the other hand, hydrophobicity diaphragm 32 prevents: particularly a small amount of when the ventilation of ejecting system 2 liquid may outwards escape in environment.
In addition, the both sides of hydrophobicity diaphragm 32 are correspondingly provided with storage 33 and 34, and described storage forms reservoir volume respectively.Storage 33 and 34 such as can be configured to the flexible tube section of elastically deformable.Storage 33,34 (because hydrophobicity diaphragm 32 has low throttling action) works as air holder on the one hand, and can receive a small amount of liquid on the other hand, described storage does not impact hydrophobicity diaphragm 32 or hinders in its gas permeability thus.
According to the present invention, hydrophobicity diaphragm 32 is set directly on the bottom of storage 33.Pipeline 35 guides to storage 34 from hydrophobicity diaphragm 32.Then another pipeline 36 guides to ventilation valve 25 from described storage, and described ventilation valve is connected with proportioning pump 7 as mentioned above via air pipeline 24.
Advantageously, the pipeline 36 on valve side is with alap level connection joint on storage 34, and pipeline 35 is arranged in the upper area of storage 34.Storage 33 (described storage is also formed into gas connection 27 simultaneously) its open wide or freely end has screen 37, described screen has very little hole, and this some holes is large flow controller.Therefore, between environment and storage 33, only little air exchange can be there is.In conventional operation, if ventilation valve 25 cuts out, then the section therefore between gas connection 27 and ventilation valve 25 forms blind alley (Sackgasse) type, and in described dead type, air remains essentially in storage 33 and 34.
Storage 33,34 has advantage: the air with high ammonia content can not enter into environment suddenly.By screen 37, fresh air is inhaled in storage 33.If the ventilation of ejecting system 2 such as performs in garage, then storage 33 prevents: the air containing ammonia is blown in environment.In the layout shown by storage 33, in conventional operation, the reason due to the aperture of screen 37 makes the air forever only in storage 33 with only low ammonia density.By contrast, storage 34 comprises the air with high ammonia density, however described in there is high ammonia density air can not escape in storage 33 in conventional operation due to the reason of the little restriction effect of hydrophobicity diaphragm 32.During ventilation process, be arranged in air that storage 34 is rich in ammonia and be inhaled into ejecting system 2 and the air being arranged in few ammonia of storage 33 enters into storage 34.By contrast, fresh air is drawn into storage 33 from outside.
Because from storage 33 and 34 and the air be inhaled in ejecting system 2 comprises ammonia, therefore in ejecting system 2 inside, (especially on the base of ventilation valve 25) can not form Crystallization thing.If ejecting system 2 puts into operation again, then the fresh air (described fresh air is during this period because the reason of hydrophobicity diaphragm is only containing very small amount of ammonia) be inhaled into when shutting down in storage 33 discharges again in environment.
The layout of this storage and hydrophobicity diaphragm 32 also realizes alternatively on storage tank side, thus storage tank 3 has hydrophobicity ventilation diaphragm 38 in the region of storage tank pipeline 6.In the case, air cushioning portion 5 forms corresponding storage 39.On another side, hydrophobicity ventilation diaphragm 38 is connected with that be equipped with screen 41 on end, particularly long pipeline 40, and wherein, pipeline 40 forms storage 42.Therefore, the accumulator apparatus on storage tank side is substantially corresponding to the accumulator apparatus on ventilation valve side.By proportioning pump 7, described two accumulator apparatus are intercomed mutually.Thus ensure that: mix when ventilation and the exhaust of ejecting system 2 air of ammonia can be with clearly defined objective conveying or supply back and forth between described two accumulator apparatus; And the gas only containing a small amount of ammonia can arrive environment from storage 33 and 42 with low content.
Gas connection 27 is configured to the situation of flue gas leading joint, also can cancels storage 33, because flue gas leading 20 works as storage in the case.
Above-described accumulator apparatus also can relative set be provided with in the ejecting system 2 of proportioning pump in the embodiment in accordance with fig. 1.In the present embodiment, filter 15 and other parts 16 equally advantageously can be set, as described in embodiment above.
Figure 4 and 5 illustrate the interchangeable mode of execution of suction valve 14.
Fig. 4 shows suction valve 14 as diaphragm valve 43.Fig. 4 A shows the plan view of the planar diaphragm 44 of diaphragm valve 43 for this reason, and wherein, diaphragm 44 has continuous print sealing frame 45, and the valve plate 47 that described sealing frame is arranged by contact pin 46 and center is connected.Valve plate 47, contact pin 46 and sealing frame 45 construct mutually integratedly.At this, diaphragm 44 is made up of the elastic material of elastically deformable.
Fig. 4 B shows the longitudinal section of diaphragm valve 43.Diaphragm valve 43 has towards the joint 48 of described joint 14 and the joint 49 towards described storage tank pipeline 6.Joint 48 and 49 is aimed at and spaced setting of turning up the soil mutually.Diaphragm 44 laterally extends between joint 48 and 49, and wherein, described diaphragm is placed on the free end of joint 48 in an initial condition hermetically.Sealing frame 45 remains on hermetically for this reason and is formed or keep in the housing of described joint 48 and 49.Therefore, air or liquid can arrive another joint through contact pin 46 and valve plate 47 from a joint by means of only diaphragm 44.If piston 10 moves towards the direction of upper dead center, then liquid therefore mineralization pressure ripple in conventional operation, described pressure wave makes valve plate 47 be pressed onto hermetically on the free end of joint 49 due to the reason of its pressure pulse, thus makes pump chamber towards the direction sealing of storage tank 3 and injection valve 21 is opened due to overvoltage.But, if air is compressed, so do not draw powerful pressure wave.Valve plate 47 is so degree ground rise only, makes air to pass through on this valve plate and to enter into another joint 49.In this case, suction valve 14 is therefore closed and air can make the exhaust after-treatment agent 4 of the liquid state being arranged in storage tank pipeline 6 return towards the direction of storage tank 3.
Fig. 5 shows the alternative form of implementation of suction valve 14, and described suction valve is configured with the piston valve 50 of integrated form flow controller in this case.At this, piston valve 50 has axially displaceable piston 51, and passage 52 is through this piston shaft to extension, and described passage forms flow controller 53.Piston 51 is directed in acceptance division 54, and the diameter of described acceptance division is substantially corresponding to the diameter of piston 41, thus described piston side is to inserting hermetically in acceptance division 54.Acceptance division 54 is configured to be longer than piston 51 vertically, thus described piston can axial motion in acceptance division 54.Joint 14 to lead in acceptance division 54 and leads on another side in storage tank pipeline 6 on side.At this, the opening of joint 14 is so directed with reference to piston 51, joint 14 is in passage 52 and is connected.By contrast, storage tank pipeline 6 so leads in acceptance division 54, this storage tank pipeline and passage 51 lateral spacing is turned up the soil and settles.If piston 51 moves as shown in the figure until upper backstop, then therefore passage 52 is closed by the housing 54 of piston valve 50.
Described functional mode is similar to the functional mode of diaphragm valve 43.If build pressure by the motion of piston 10 in pump chamber 12 in conventional operation, then the pressure wave formed by fluid be result in: piston 51 is pressed against in upper backstop and passage 52 is closed thus.But if air is compressed in pump chamber 12, then described air can flow through passage 52, and without the need to making piston 51 be extruded in upper backstop.Thus, compressed air can enter into storage tank pipeline 6 by passage 52 and there by back to squeeze for the exhaust after-treatment agent 4 of liquid state.
If liquid is inhaled in conventional operation, then piston 51 is extruded in lower backstop, and in described lower backstop, described passage 52 is always connected with joint 14, thus exhaust after-treatment agent 4 always can be flowed towards the direction of pump chamber 12.In this suction valve variant advantageously, ventilation valve 25 is just of short duration after arrival upper dead center is opened by piston 10.Thus ensure that, piston 51 reliably have left backstop.Also can piston be promoted to open by pressing spring or run in lower backstop if desired, described pressing spring be such as arranged in the acceptance division 54 between backstop and piston 51.
If ejecting system 2 is vented again, then when piston 10 moves down towards the direction of lower dead centre, ventilation valve 25 cuts out.Thus, the air being arranged in ejecting system 2 enters into pump chamber 12.Piston 10 is ensuing move upward time, valve 25 is opened and the air being arranged in pump chamber 12 leaves ejecting system 2 via ventilation valve 25 again and entered environment, enter into storage tank 3 or enter into flue gas leading 20.Restriction effect and be so large towards the static pressure in the direction of storage tank 3, makes air can not be overflowed towards the direction of storage tank 3 by joint 14.If should expect the ventilation valve 25 higher pressure loss over there, then advantageously, filter 32 above-mentioned in the bottom of storage tank is configured to hydrophobic filters.
Claims (15)
1. the ejecting system (2) for dosage ground atomizing of liquids, especially for the exhaust aftertreatment device (1) of Motor Vehicle, described ejecting system has: storage tank (3), for storing described liquid, metering valve (19), steerable ventilation valve (25), enters into described ejecting system (2) for making gas or discharges from described ejecting system, proportioning pump (7), described proportioning pump is connected with described storage tank (3) and with described metering valve (19), liquid is delivered to described metering valve (19) from described storage tank (3), it is characterized in that, described proportioning pump (19) is configured to reciprocating pump (8) and has the piston (10) that can move axially between upper dead center and lower dead centre in a cylinder (9), described piston forms pump chamber (12) together with described cylinder (9), wherein, the described cylinder (9) of attaching troops to a unit in described pump chamber (12) has: the first joint (14), described first joint is connected with described storage tank (3) by storage tank pipeline (6), second joint (17), described second joint is connected with described metering valve (19) by delivery line (18), 3rd joint (23), described 3rd joint is connected with described ventilation valve (25) by air pipeline (24).
2. ejecting system according to claim 1, it is characterized in that, described second joint (17) is arranged in the end regions towards described upper dead center (26) of described cylinder (9), is particularly arranged on the side of described cylinder (9).
3. according to the ejecting system one of aforementioned claim Suo Shu, it is characterized in that, described 3rd joint (23) is arranged in the end regions towards described upper dead center (26) of described cylinder, is particularly arranged in the shell wall (13) of described cylinder (9).
4. according to the ejecting system one of aforementioned claim Suo Shu, it is characterized in that, moving direction along described piston (10) is observed, and described first joint (14) is configured in the shell wall (13) of described cylinder (9) between described 3rd joint (23) and the lower dead centre of described piston (10).
5. the ejecting system according to any one in claims 1 to 3, is characterized in that, described first joint (14) is arranged on the side of described cylinder (9).
6. ejecting system according to claim 5, it is characterized in that, be equipped with an automatic suction valve (30) to described first joint (14), described suction valve at described piston (10) towards opening during the direction motion of lower dead centre and at least substantially closing when described piston (10) moves towards the direction of upper dead center.
7. ejecting system according to claim 6, is characterized in that, described suction valve (30) is configured to spring-loaded safety check (31).
8. ejecting system according to claim 6, is characterized in that, described suction valve (30) is configured to diaphragm valve (43).
9. ejecting system according to claim 6, is characterized in that, described suction valve (30) is configured to the piston valve (50) with integrated form flow controller (53).
10. according to the ejecting system one of aforementioned claim Suo Shu, it is characterized in that, described ventilation valve (25) is connected with a gas connection (27), described gas connection is particularly configured to ambient air joint, be configured to flue gas leading joint when being connected with the flue gas leading (20) of Motor Vehicle, or be configured to vent connection when being connected with described storage tank (3).
11. ejecting systems according to claim 10, is characterized in that, are connected with at least one hydrophobicity diaphragm (32) between described ventilation valve (25) and described gas connection (27).
12. ejecting systems according to claim 11, is characterized in that, to described hydrophobicity diaphragm (32) be equipped with at least one storage (33,34) for liquid state or the medium of gaseous state.
13. 1 kinds for particularly according to the proportioning pump (7) of described ejecting system (2) one or more in aforementioned claim, it is characterized in that, described proportioning pump is configured to reciprocating pump (8) and has the piston (10) that can move axially between upper dead center and lower dead centre in a cylinder (9), described piston forms pump chamber (12) together with described cylinder (9), wherein, the described cylinder (9) of attaching troops to a unit in described pump chamber (12) has: the first joint (14), for the storage tank pipeline (6) that can be connected with the storage tank of described ejecting system (2) (3), second joint (17), for the delivery line (18) be connected with the metering valve (19) of described ejecting system (2), 3rd joint (23), for the air pipeline (24) be connected with described ventilation valve (25) of described ejecting system (2).
14. 1 kinds of exhausted gas post-processing systems for Motor Vehicle (1), it has ejecting system (2), for the exhaust after-treatment agent (4) of liquid state is ejected in the waste gas produced by internal-combustion engine, it is characterized in that, described ejecting system (2) described to construct according to one or more in claim 1 to 12.
15. 1 kinds for running the method according to the described ejecting system (2) for dosage ground atomizing of liquids one or more in claim 1 to 12, it is characterized in that, in order to be switched to the state of anti-ice pressure from the conventional operation of conveying liquid, make piston (10) at least substantially continue run and so open and close ventilation valve (25) according to the position of this piston (10) as in conventional operation, gas is introduced in described ejecting system (2).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012208933.0 | 2012-05-29 | ||
| DE102012208933A DE102012208933A1 (en) | 2012-05-29 | 2012-05-29 | Injection system, dosing pump, exhaust aftertreatment device, method |
| PCT/EP2013/056991 WO2013178384A1 (en) | 2012-05-29 | 2013-04-03 | Injection system, metering pump, exhaust gas treatment device, method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104350251A true CN104350251A (en) | 2015-02-11 |
Family
ID=48083145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380028295.7A Pending CN104350251A (en) | 2012-05-29 | 2013-04-03 | Injection system, metering pump, exhaust gas treatment device, method |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20150184570A1 (en) |
| EP (1) | EP2855866A1 (en) |
| CN (1) | CN104350251A (en) |
| DE (1) | DE102012208933A1 (en) |
| WO (1) | WO2013178384A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285851A (en) * | 2016-09-22 | 2017-01-04 | 凯龙高科技股份有限公司 | A kind of dosing pump fluid path blow device |
| CN106609690A (en) * | 2015-10-23 | 2017-05-03 | 埃贝斯佩歇排气技术有限责任两合公司 | Device and method for dispensing reagent into the exhaust gas flow of an internal combustion engine |
| CN108930573A (en) * | 2017-05-27 | 2018-12-04 | 罗伯特·博世有限公司 | Aqueous solution of urea feed system and the method for controlling the pressure oscillation in the system |
| CN110235312A (en) * | 2017-01-25 | 2019-09-13 | 罗伯特·博世有限公司 | For will include equipment, the dosage module that is used to have the exhaust aftertreatment device of this equipment that the cable of multiple core wires or twisted wire is introduced into shell |
| CN110318968A (en) * | 2018-03-29 | 2019-10-11 | 马涅蒂-马瑞利公司 | Piston pump and corresponding control methods |
| CN113009903A (en) * | 2021-02-22 | 2021-06-22 | 一汽解放汽车有限公司 | Fault diagnosis method and device, vehicle and storage medium |
| CN114929371A (en) * | 2019-12-27 | 2022-08-19 | 新时代技研株式会社 | Gas supply system, mechanical foaming system and method for supplying gas |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019103544A1 (en) * | 2019-02-13 | 2020-08-13 | Bayerische Motoren Werke Aktiengesellschaft | Method for controlling a metering valve, tank ventilation system and motor vehicle |
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- 2013-04-03 EP EP13715185.8A patent/EP2855866A1/en not_active Withdrawn
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| US20050252201A1 (en) * | 2004-05-17 | 2005-11-17 | Lecea Oscar A | Method and apparatus for reducing NOx emissions |
| US20070068525A1 (en) * | 2004-09-07 | 2007-03-29 | Michael Offenhuber | Apparatus for introducing a reducing agent into the exhaust of an internal combustion engine |
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| CN106285851A (en) * | 2016-09-22 | 2017-01-04 | 凯龙高科技股份有限公司 | A kind of dosing pump fluid path blow device |
| CN110235312A (en) * | 2017-01-25 | 2019-09-13 | 罗伯特·博世有限公司 | For will include equipment, the dosage module that is used to have the exhaust aftertreatment device of this equipment that the cable of multiple core wires or twisted wire is introduced into shell |
| CN108930573A (en) * | 2017-05-27 | 2018-12-04 | 罗伯特·博世有限公司 | Aqueous solution of urea feed system and the method for controlling the pressure oscillation in the system |
| CN110318968A (en) * | 2018-03-29 | 2019-10-11 | 马涅蒂-马瑞利公司 | Piston pump and corresponding control methods |
| CN114929371A (en) * | 2019-12-27 | 2022-08-19 | 新时代技研株式会社 | Gas supply system, mechanical foaming system and method for supplying gas |
| CN113009903A (en) * | 2021-02-22 | 2021-06-22 | 一汽解放汽车有限公司 | Fault diagnosis method and device, vehicle and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013178384A1 (en) | 2013-12-05 |
| DE102012208933A1 (en) | 2013-12-05 |
| US20150184570A1 (en) | 2015-07-02 |
| EP2855866A1 (en) | 2015-04-08 |
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Application publication date: 20150211 |