CN102606258A - Particle filter and method for the purification of an exhaust-gas flow - Google Patents
Particle filter and method for the purification of an exhaust-gas flow Download PDFInfo
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- CN102606258A CN102606258A CN2012100176584A CN201210017658A CN102606258A CN 102606258 A CN102606258 A CN 102606258A CN 2012100176584 A CN2012100176584 A CN 2012100176584A CN 201210017658 A CN201210017658 A CN 201210017658A CN 102606258 A CN102606258 A CN 102606258A
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- Prior art keywords
- particulate filter
- exhaust
- filter
- particulate
- vent systems
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/031—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters having means for by-passing filters, e.g. when clogged or during cold engine start
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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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
- F01N13/017—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel the purifying devices are arranged in a single housing
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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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
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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
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
- F01N2900/1406—Exhaust gas 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
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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
- Y02T10/40—Engine management systems
Abstract
Particle filters and a method for the purification of an exhaust-gas flow are described. In one example, exhaust gas is directed solely to a first particulate filter until a predetermined condition. Then exhaust gas is directed to a second particulate filter. One particulate filter may surround the other of two particulate filters. The particulate filters may provide filtered exhaust gas even when one filter becomes at least partially loaded.
Description
Related application
The application requires the preference of the German patent application No.102011003019.0 of submission on January 24th, 2011, and its full content is incorporated this paper as a reference into.
Technical field
The present invention relates to particulate filter and be used for the method that blast air purifies.Especially, the present invention relates to the purification or the filtration of exhaust of the explosive motor of motor vehicle.
Background technique
In order to reduce exhaust emissions, can keep the particulate that produces during the fuel combustion by filter, for example the carbon containing soot.For this purpose, blast air is through wherein gathering the filter of particulate.In order to reduce particulate loading and to guarantee the controlled level of exhaust back pressure, the essential regular regeneration of filter.
Under the situation of filter near storage capacity, higher exhaust back pressure can cause adverse effect to the performance of motor.In addition, under the situation of high soot load, the heat release that produces during the particulate filter regeneration can damage the part of vent systems.
Summary of the invention
DE 10206805A1 proposes a kind of soot filters that is used for exhaust gas purification, and wherein, soot filters has predetermined flex point, and it is used for reducing the main exhaust back pressure of soot filters.Should predetermined flex point can be disposed in the by-pass line of filter body and/or filter of filter.The present invention is based on the purpose that improves exhaust gas purification.The mode of the characteristic of the claim that comprises through this paper realizes said purpose.The dependent claims that this paper comprises defines the scheme of favourable refining of the present invention.
In one example, the inventor has developed a kind of vent systems of motor vehicle, and it comprises: first particulate filter; Second particulate filter; And exhaust line wire system; Said exhaust line wire system comprises through first exhaust passage of first particulate filter and second exhaust passage through second particulate filter; And suction valve, it is biased in operating position and is positioned at the upper reaches of first and second particulate filters.
Under the condition of particulate matter in being stored in first particulate filter near the storage capacity of first particulate filter, can reduce the possibility that vehicular discharge increases around first particulate filter through second exhaust pathway is provided.Especially, under the condition of the particulate matter in being stored in particulate filter less than threshold quantity, can basically only exhaust be guided to first particulate filter, thereby practice thrift or keep the particulate matter storage capacity in second particulate filter.Yet, when the particulate matter in being stored in first particulate filter surpasses threshold level, can start second exhaust pathway, the said second exhaust pathway directing exhaust gas arrives second particulate filter.In this way, can reduce the exhaust back pressure of motor, up to regenerating or changing first particulate filter.
The present invention can provide many advantages.Especially, said method can be improved engine emission through the exhaust gas filter capacity that increases vehicle exhaust system.In addition, said method can prolong the time between vehicle service interval and/or the particulate filter regeneration.In addition, in some instances, said method can be embodied as and has cost-benefit configuration, and it can not comprise automatically controlled exhaust line wire system.
When separately or when combining accompanying drawing to consider following embodiment, above advantage of the present invention and other advantages and characteristic will be easy to become obvious.
Should be understood that provides the foregoing invention content, thereby is introduced in the series of concepts that further describes in the embodiment with reduced form.This does not also mean that sign requires the key or the major character of the theme of protection, requires the scope of the theme of protection to be limited uniquely the claim after the embodiment.In addition, the theme of requirement protection is not limited to solve the mode of execution or any part of the present disclosure of above-mentioned any shortcoming.
Description of drawings
Through separately or with reference to the exemplary example that is called embodiment in this article of advantages, advantage as herein described will be understood more fully, wherein:
Fig. 1 is the schematic representation of motor;
Fig. 2 shows particulate filter and the exhaust line wire system according to the normal operation period at particulate filter of the present invention;
Fig. 3 shows particulate filter and the exhaust line wire system of the particulate matter in being stored in first particulate filter according to the present invention during greater than the condition of threshold value; And
Fig. 4 is the flow chart that is used to operate the motor that comprises vent systems, and said vent systems can guide engine exhaust to get into first and second particulate filters.
Accompanying drawing only is used to explain the present invention, and is not intended to limit the present invention.Accompanying drawing and independently part needn't draw in proportion.Identical reference mark is used to represent identical or similar part.
Embodiment
The present invention relates to the operation that directing exhaust gas arrives the motor of particulate filter.In a non-limiting example, can configuration motor as shown in Figure 1.Fig. 2 and Fig. 3 provide two particulate filters and the directing exhaust gas detailed view through the exhaust line wire system of two particulate filters.As shown in Figure 2, the particulate matter in being stored in first particulate filter is during less than threshold quantity, and exhaust can basically only be flowed through first particulate filter.As shown in Figure 3, the particulate matter in being stored in first particulate filter is during greater than threshold quantity, and exhaust can be flowed through second particulate filter.Fig. 4 provides a kind of method, and this method is used to operate motor and via the first and second particulate filter purifying engine exhausts.
With reference to figure 1, control the explosive motor 10 that comprises a plurality of cylinders, one of them cylinder shown in Fig. 1 through electronic engine control device 12.Motor 10 comprises firing chamber 30 and cylinder wall 32, and piston 36 is positioned at wherein and is connected to bent axle 40.The suction valve 52 that firing chamber 30 is shown as through separately is communicated with intake manifold 44 and gas exhaust manifold 48 with outlet valve 54.Each suction valve and outlet valve all can be by intake cam 51 and exhaust cam 53 operations.Can confirm the position of intake cam 51 by intake cam sensor 55.Can confirm the position of exhaust cam 53 by exhaust cam sensor 57.
The fuel injector 66 that shows is positioned as and injects fuel directly in the cylinder 30, and known its of those skilled in the art is direct injection.The liquid fuel of fuel injector 66 transmission is proportional with the pulse width of the signal FPW that comes self-controller 12.Through the fuel system (not shown) fuel is transferred to fuel injector 66, this fuel system comprises fuel tank, petrolift, fuel rail (not shown).Can regulate fuel pressure through changing the point valve of regulating the flow that gets into the petrolift (not shown) through the fuel system transmission.In addition, metering valve can be arranged near fuel rail or the fuel rail, to be used for closed loop fuel control.Driver 68 through response controller 12 provides operating current to fuel injector 66.
Intake manifold 44 is shown as with optional electronic throttle 62 and is communicated with, and said electronic throttle 62 is regulated the position of Rectifier plate 64, thereby control is from the air stream of air plenum 46.Compressor 162 from air inlet 42 extracting airs to supply with pumping chamber 46.Exhaust rotary turbine 164 is coupled to compressor 162.
When along with piston, takes fire in firing chamber 30 automatically during fire fuel near the top dead center compression stroke.In some instances, wide territory exhaust oxygen (UEGO) sensor (not shown) can be coupled to the gas exhaust manifold 48 at tapping equipment 70 upper reaches.In other examples, this UEGO sensor can be positioned at the downstream of one or more exhaust gas post-treatment device.In addition, in some instances, can replace the UEGO sensor by the NOX sensor.
In one example, exhaust gas post-treatment device 70 can comprise particulate filter.In another example, can use a plurality of emission control systems, for example each all has the catalyst converter and the particulate filter of a plurality of bricks.In one example, exhaust gas post-treatment device 70 can comprise particulate filter and oxidation catalyst.
In certain embodiments, motor can be coupled to the electric motor/battery system in the motor vehicle driven by mixed power.Motor vehicle driven by mixed power can have parallelly connected structure, series configuration or its modification or combination.
Run duration, each cylinder in the motor 10 all experiences four stroke cycle usually: this circulation comprises aspirating stroke, compression stroke, expansion stroke and exhaust stroke.Usually during aspirating stroke, exhaust valve 54 closures, and intake valve 52 is opened.Through intake manifold 44 air is introduced in the firing chamber 30, and piston 36 moves to the bottom of cylinder, so that increase the volume in the firing chamber 30.Those skilled in the art are called lower dead center (BDC) with piston 36 near the bottom of cylinder and the position that is in the end (for example, when firing chamber 30 is in its maximum volume) of its stroke usually.During compression stroke, intake valve 52 and exhaust valve 54 closures.Piston 36 moves towards cylinder head, so that the air in the compression and combustion chamber 30.Those skilled in the art are in piston 36 the terminal of its stroke and are called top dead center (TDC) near the point of cylinder head (for example, when firing chamber 30 is in its minimum volume) usually.Be called hereinafter in the process of injection, fuel is introduced in the firing chamber.In some instances, cylinder cycle period, can be with fuel multi-injection suction casig.Be called hereinafter in the process of igniting, through ignition by compression or for example known ignition mechanism such as spark plug (not shown) light injected fuel, cause burning.During expansion stroke, expanding gas pushes back BDC with piston 36.Bent axle 40 is converted into piston motion the rotation torque of running shaft.At last, during exhaust stroke, exhaust valve 54 is opened, thereby the air-fuel mixture after will burning is released into gas exhaust manifold 48, and piston returns TDC.Notice that preceding text are merely example, and the unlatching of intake & exhaust valves and/or closed can change regularly, valve overlap, intake valve retarded closing or various other examples of plus or minus for example are provided.In addition, in some instances, can use two stroke cycle but not four stroke cycle.
According to a first aspect of the invention; The particulate filter of vent systems that is used to have the motor vehicle of exhaust pathway comprises filter and comprises second filter; Wherein in service normally; Exhaust pathway passes filter, and wherein under overload or the situation near the storage capacity of filter, exhaust pathway passes second filter.In overload or under near the situation of the storage capacity of filter (being also referred to as first filter or main filter) (for example, the particulate matter of storing predetermined threshold quantity), activate second filter at this.Then, second filter filtering exhaust stream.According to the present invention, under overload or the situation near the storage capacity of soot filters, blast air continues to be filtered.
Thereby, still observe discharge regulation, and can alleviate the degeneration in the exhaust after treatment system.Under overload or the situation near the storage capacity of soot filters, blast air can basically only flow through second filter, or through second filter and to a certain extent through (first) filter.Except overload or near the storage capacity, also possibly reduce the having a strong impact on of degenerate state of the filter that exhaust back pressure wherein increases in this way.Correspondingly, the pattern that wherein activates one or more second filter also can be called as second operating mode.In said second operating mode, the soot filters and/or can begin filter exchange of can regenerating.
Second filter can center on said filter.Say that from the aspect that flows this is the layout of expectation, it saves space and compatible with the installation dimension of having set up more.Particulate filter can be a cylindrical form, and itself and tubulose vent systems are coordinated good.
Second filter can have suction valve and outlet valve.Through the said valve or the mode of the similar device of trap (flap) or some other variable openings for example, can activate second filter.That is to say that can convert the exhaust line wire system into second pattern from the normal mode that blast air passes said filter, wherein blast air passes second filter.In some instances, the exhaust line wire system can only comprise single suction valve, and does not comprise outlet valve.
Can be through spring to suction valve and/or outlet valve preloading.Can realize conversion through the plain mode of one or more spring.Spring on the suction valve can form by size, when reaching specific exhaust back pressure with box lunch, opens exhaust pathway so that exhaust gets in second filter.Spring on the outlet valve can form by size, when being higher than the pressure in the exhaust area of filter or particulate filter with the pressure in convenient second filter, opens said path so that second filter is discharged in exhaust.Thereby in some instances, the exhaust line wire system can passively be moved, and does not need electric control.
In order to survey the load of second filter, can in the zone of second filter, arrange pressure transducer.Therefore, can begin the regeneration of second filter, and for example exchange particulate filter and/or one or more status message, so that improve the integration of whole system thus with exhaust after treatment system and/or engine management controller.
Can be provided for surveying the sensor of the position of suction valve and/or outlet valve.Through said sensor, can survey the operating mode of particulate filter, and send information to other system.Can in the zone of second filter, arrange temperature transducer.Thermometry in the zone of second filter can be with for example using in the measurement of the delivery temperature at the suction port place of vent systems, thereby survey operating mode.Can be mobile (wall-flow) filter of wall or through-flow (throughflow) filter with the filter and/or second filter design.The filter type of said foundation is fit to particulate filter very much.
According to a second aspect of the invention, be used for purification of combustion equipment, especially the method for the blast air of the motor of motor vehicle may further comprise the steps: through the filter cleaning blast air, under the situation of filter overload, make the blast air diverted flow cross second filter.
Use advantage and modification same as described above at this equally.Because the turning to of blast air can be reduced because the engine damage that the exhaust back pressure increase causes or the possibility of degeneration.Can survey gathering of particulate matter in the particulate filter overload or first and/or second particulate filter through the exhaust back pressure that increases.Can carry out said detection through one or more sensor.On the other hand, also can use to be used to turn to the device of blast air to survey overload, for example through changing or activate the device of one or more the steering gear in the dark.
In overload or reach under the situation of threshold value soot storage capacity of second filter, its filter efficiency possibly descend, and exhaust back pressure can remain on normal level.This has the following advantages, and promptly exhaust back pressure does not increase through second filter once more.When blast air passes second filter, first particulate filter and/or can begin filter exchange of can regenerating.Thereby, can during the working time of second filter, recover the state of (first) filter.When regenerating and/or exchanged first filter, can pass through first filter once more by directing exhaust gas stream.In this way, first particulate filter is returned normal operation mode.Can follow the regeneration of second filter after this.
Thereby the system among Fig. 1 provides a kind of vent systems of motor vehicle, and it comprises: first particulate filter; Second particulate filter; And exhaust line wire system; This exhaust line wire system comprises through first exhaust passage of first particulate filter and through second exhaust passage of second particulate filter, is biased in operating position and is positioned at the suction valve at the first and second particulate filter upper reaches.Said vent systems comprises following situation; Particulate in being stored in first particulate filter is during less than threshold level; Exhaust basically only is directed to first particulate filter; And the particulate in being stored in first particulate filter is during greater than threshold level, and the exhaust line wire system is supplied to second particulate filter with exhaust.
Said vent systems also comprises the situation of second particulate filter around first particulate filter.In some instances, vent systems further comprises the preloaded spring that suction valve is biased in operating position.The exhaust applied pressure can overcome the power of spring, thereby opens suction valve.Vent systems further comprises outlet valve, and it is positioned at the downstream of second particulate filter and first particulate filter.Vent systems further comprises the preloaded spring that outlet valve is biased in operating position.
Vent systems further comprises the pressure transducer that is positioned at the first particulate filter upper reaches.Pressure transducer can be used as and determines when the basis of opening suction valve.In addition, pressure transducer can be used as the basis that determines when closed suction valve.Vent systems further comprises the pressure transducer that is positioned at the second particulate filter downstream.Vent systems further comprises suction valve position transducer, exhaust valve positions sensor and the temperature transducer that is positioned at the second particulate filter upper reaches.
With reference now to Fig. 2,, it shows and is used for explosive motor, for example is used for the vent systems or the exhaust after treatment system 70 of the explosive motor of motor vehicle.The blast air 203 that explosive motor the produces gas exhaust piping 202 of on relief opening or exhaust duct direction, flowing through.In gas exhaust piping 202, be furnished with particulate filter 204, it also can be the constituent element of gas exhaust piping 202 or vent systems 70.In order to reduce discharging, particulate filter 204 is used for particulate is leached from blast air 203.Blast air 203 is advanced along exhaust pathway 203 in particulate filter 204, and said exhaust pathway has the reference mark identical with blast air 203.
In order to filter, particulate filter 204 comprises filter 205, and it is designed to the wall flow filter at this.What be arranged in filter 205 upper reaches is the air inlet area 206 of particulate filter 204, and this air inlet area broadens the cross section of gas exhaust piping 202 to be the bigger cross section of filter 205.What be arranged in filter 205 downstream is exhaust area 207, and it is contracted to cross section the cross section of gas exhaust piping 202 once more.Filter 205 is about running shaft 208 rotation symmetries with particulate filter 204 by global design.The inner region of filter 205, especially stream pipe (flow duct) and/or wall need not rotate symmetry.
In air inlet area 206, be furnished with one or more suction valve 211, this suction valve connects air inlet area 206, and therefore gas exhaust piping 202 is connected to second filter 209.Suction valve 211 can be distributed on the inner circumference of second filter 209.In exhaust area 207, be furnished with one or more outlet valve 212, this outlet valve is connected to exhaust area 207 with second filter 209, and therefore is connected to gas exhaust piping 202.Can design similarly and/or arranging exhaust air valve 212 with suction valve 211.In addition, blast air can be in and help open valve to get into and to leave on the direction of second filter.
In order to survey the temperature in second filter 209, in second filter 209, arranged temperature transducer 213.Also can in the zone of second filter 209, arrange temperature transducer 213, for example arrange temperature transducer 213 on the outer wall of second filter 209 or on outlet valve 212.What in second filter 209, arrange equally is pressure transducer 214, based on increased pressure, can survey the load of second filter 209 through this pressure transducer 214.Pressure transducer 214 need directly be arranged in second filter 209 yet, but for example can be arranged in the suction valve 211.
One or more sensor 215, the mode through example shows the position that two sensors are surveyed suction valves 211 and/or outlet valve 212.Depend on the number of suction valve 211 and outlet valve 212, a plurality of sensors 215 can be provided.One or more sensor 215 also can only be surveyed the position of one or more suction valve 211, perhaps only surveys the position of one or more outlet valve 212.Show particulate filter 204 and have sensor 213,214 and 215, but particulate filter 204 also can form self-evidently and do not have sensor fully, perhaps can only be equipped with some sensors in the said sensor.
The operation of particulate filter 204 below will be described based on Fig. 2 and Fig. 3.When filter 205 complete functions, that is to say that do not degenerate, perhaps particulate overload perhaps is stored under the situation of particulate matter less than threshold quantity in first particulate filter 204, particulate filter 204 is in normal mode (for example, Fig. 2).In said normal mode, the exhaust back pressure that particulate filter 204 produces is in normal range (NR), and it does not make motor or vent systems degenerate, and does not cause that perhaps the threshold value of engine power reduces.In order to be cleaned, the blast air 203 that passes gas exhaust piping 202 filter 205 of flowing through.Therefore, at normal operation period, exhaust pathway 203 filter 205 of flowing through.
Just at run duration, in filter 205, gather ever-increasing granule amount at explosive motor, make the particle loaded continuous increase of filter 205, consequently the flow resistance of filter 205 increases.Therefore, exhaust back pressure increases, and reaches certain value up to it, and at this value place, the decreased performance of explosive motor surpasses threshold quantity, the risk that perhaps exists explosive motor or vent systems to degenerate.Now, particulate filter 204 converts second pattern shown in Figure 20 2 into, and wherein exhaust pathway 203, that is to say, the path of blast air 203 is through second filter 209.
Change the trigger of operating mode or the exhaust back pressure that spur can be filter 205, and be the exhaust back pressure of particulate filter 204 therefore.Can through in the air inlet area 206 for example or the pressure transducer 240 in the gas exhaust piping 202 confirm exhaust back pressure.If but exhaust back pressure surpasses predefine and/or variable specific threshold, then suction valve 211 is opened, so that exhaust pathway passes second filter 209.Suction valve 211 can activate via actuator 250 is outside, for example through motor or mechanical system is outside activates, perhaps opens and closed through mechanism or actuator 250 are inner, for example through being arranged in spring and the closure or openness on the valve or in the valve.In having the example of spring, can omit the sensor that is used for exhaust back pressure, because when being higher than the exhaust back pressure of being set by spring force, valve is opened automatically.
Then, blast air 203 is filtered by second filter 209.Be similar to suction valve 211, under increased pressure, outlet valve 212 is opened.If the pressure in second filter 209 surpasses the pressure in the exhaust area 207, then the outlet valve 212 of spring preload is opened, so that filter 205 is passed in blast air 203 circulations.Not getting rid of fraction blast air 203 here, continues through filter 205 circulations.When blast air 203 passes second filter 209,, can carry out the regeneration of first filter 205 in order to recover the performance of first filter 205.
Here, second filter 209 is constructed to make that its filter efficiency reduces under the situation of second filter, 209 overload, and exhaust back pressure remains on normal level.In other words, this means that even under the long playing relatively situation of second filter 209, exhaust back pressure does not increase to performance that reduces explosive motor or the degree of damaging explosive motor yet.
In addition, but working pressure sensor 214 to survey the load of second filter 209.Under 209 overload of second filter or situation, can begin the initiative regeneration of second filter 209 near overload.In addition, the overload pattern can be indicated, and regeneration or filter exchange can be begun.Begin which kind of measure and can be depending on the required cracking pressure of suction valve 211 and/or outlet valve 212.The level of filter load can come from this.
Similarly, the sensor 215 of the position through surveying suction valve 211 and/or outlet valve 212, the activation of detectable second pattern, and the corresponding reaction of beginning.Also can survey second pattern through temperature transducer 213.For this purpose, with the temperature signal of temperature transducer 213, for example the performance graph of signal is compared with the delivery temperature at the suction port place of exhaust after treatment system 70.
When regenerating and/or having exchanged filter 205, wherein depend on the design of particulate filter 204, exchange filter 205 or complete particulate filter 204, the blast air filter 205 of flowing through once more.Because when filter 205 was in correct status, exhaust back pressure was in normal level once more, so be used for suction valve 211 closures of second filter 209.Sensor and state signal are correspondingly represented the normal operation of particulate filter 204 once more.Sensor is connected to one or more control unit; Said control unit is given particulate filter 204 or is comprised the information about the state of particulate filter 204 by specific assigned, and said control unit is for example for being used for the control unit of exhaust aftertreatment and/or engine management.
With reference now to Fig. 4,, wherein show the method that is used to operate vent systems, said vent systems can guide to engine exhaust the vent systems of first and second particulate filters.Can the method among Fig. 4 be stored in the non-volatile media as executable instruction, for example be stored in the storage in the system shown in Figure 1.When the engine combustion air-fuel mixture, executing method 400.
In step 402, method 400 is confirmed operating mode.Operating mode can include but not limited to: the temperature of pressure, engine speed, engine loading and the particulate filter in the pressure at the particulate filter upper reaches, particulate filter downstream.After confirming operating mode, method 400 proceeds to step 404.
In step 404, the basic all engine exhausts of method 400 guiding arrive first particulate filter.In one example, first particulate filter is the design shown in Fig. 2 and Fig. 3.Thereby first particulate filter is the unique particulate filter that receives from the exhaust of motor.Method 400 proceeds to step 406 from step 404.
In step 406, method 400 confirms to be stored in the amount of the particulate matter in first particulate filter.In one example, the amount of particulate matter is based on the pressure at the observed particulate filter upper reaches.Especially, the soot memory space that the storage experience is confirmed in the form in storage, its exhaust pressure of passing through engine speed, engine loading or the engine airflow and the upper reaches is as index.The amount of soot of storing in the said form output particulate filter, perhaps replacedly, the percentage of the soot storage capacity of having used of output particulate filter.After the amount of soot of confirming to be stored in the particulate filter, method 400 proceeds to step 408.
In step 408, method 400 judges whether the amount that is stored in the particulate matter in the particulate filter surpasses threshold quantity.In one example, will compare with predetermined amount of soot from the amount of soot of step 406.If the amount of soot that is stored in the particulate filter surpasses threshold quantity, then method 400 proceeds to step 410.Otherwise method 400 is carried out and is withdrawed from.
In step 410, method 400 directing exhaust gas arrive second particulate filter.Can be through changing the location guide exhaust of valve.In one example, adjust the position of valve through overcoming spring force.In other examples, can pass through solenoid or motor open valve.After exhaust was guided to second particulate filter, method 400 got into step 412.
In step 412, can begin the regeneration of first particulate filter.Replacedly, the indication that should change first particulate filter can be provided to the operator of vehicle.Can be through the temperature that improves first filter first particulate filter of regenerating.In one example, can improve the temperature of first particulate filter through the temperature that improves exhaust.Can and postpone the fuel injection timing through the throttling motor and improve delivery temperature.Replacedly,, then can postpone spark correct time, thereby improve delivery temperature if motor is a spark ignition engine.In addition, can confirm to be stored in the amount of the particulate matter in first particulate filter like step 406 saidly.In some instances, the valve that exhaust is guided to second particulate filter can be closed by periodically, when confirming to be stored in the amount of soot in first particulate filter with box lunch, do not have engine exhaust to be directed to second particulate filter basically.In addition, when the temperature of first or second particulate filter surpasses threshold temperature, can suction valve is periodically closed.After regeneration or notice were provided, method 400 proceeded to step 414.
In step 414, method 400 judges that whether the particulate matter that is stored in first particulate filter is less than threshold quantity.To compare in amount of soot and the soot threshold quantity that step 412 is confirmed.If the amount of soot of confirming in step 412 is less than the soot threshold quantity, then method 400 is carried out and is withdrawed from.Otherwise method 400 is returned step 410.
Thereby the method for Fig. 4 provides a kind of exhaust gas-cleaning method, and it comprises: the amount of soot in being stored in first particulate filter (PF) basically only will guide to a PF from the exhaust of motor during less than threshold value; And the amount of soot in being stored in a PF will guide to the 2nd PF from the exhaust of motor during greater than threshold value, and the 2nd PF is contiguous and around a PF.Through this mode, even be stored in after an amount of soot in the particulate filter surpasses threshold quantity, but also filtering exhaust.
This method further comprises the air-fuel mixture in the combustion engine, thereby produces exhaust, and wherein confirms to be stored in the amount of soot in first particulate filter through the exhaust back pressure that increases.This method comprises: during the condition of the amount of soot in being stored in first particulate filter greater than threshold quantity, the filter efficiency of first particulate filter descends from specified filter efficiency, and exhaust back pressure remains on below the threshold level.This method further comprises: when exhaust is directed to second particulate filter; First particulate filter of regenerating; And this method further is included in during regeneration first particulate filter, opens and the closed suction valve of regulating the air-flow that flows to second particulate filter.This method further comprises: after regeneration first particulate filter, the guiding engine exhaust is only through first particulate filter.
In another example, the method for Fig. 4 provides the purification of engine exhaust, and said method comprises: the air-fuel mixture in the combustion engine; When the pressure at the first particulate filter upper reaches during, only will guide to first particulate filter from the exhaust of motor less than threshold quantity; And when the exhaust pressure at the first particulate filter upper reaches overcomes spring force, will guide to second particulate filter from the exhaust of motor, wherein second particulate filter is around the part of first particulate filter.This method also comprises: directing exhaust gas is through suction valve and outlet valve.This method further comprises: when exhaust is guided to second particulate filter, and first particulate filter of regenerating.
The those of ordinary skill in related domain will recognize, the process of describing among Fig. 4 can be represented a kind of or more kinds of in the processing policy of any amount, for example processing policy of event-driven, drives interrupts, Multi task, multithreading or the like.Likewise, many steps of explanation or function can be carried out through the order of explanation, and executed in parallel perhaps can be omitted in some cases.Likewise, the order of processing is not that to be implemented in this purpose of description, characteristic and advantage necessary, but in order to be easy to explanation and to describe and provide.Though clearly do not illustrate, the those of ordinary skill in related domain should be understood, depends on the specific policy of use, can repeat the step or the function of one or more explanation.
This is the conclusion that specification is made.Through reading this specification, those skilled in the art will recognize that many replacement and modifications without departing from the spirit and scope of the present invention.For example, L3, L4, L5, V6, V8, V10 and the V12 motor with rock gas, gasoline, diesel oil or the operation of replaceable fuel placement can use the present invention to benefit.
Claims (17)
1. the vent systems of motor vehicle, it comprises:
First particulate filter;
Second particulate filter; And
The exhaust line wire system; It comprises: through first exhaust passage of said first particulate filter; And second exhaust passage through said second particulate filter, be biased in operating position and be positioned at the suction valve at said first particulate filter and the said second particulate filter upper reaches.
2. vent systems according to claim 1; When wherein the particulate in being stored in said first particulate filter is less than threshold level; Exhaust only is directed to said first particulate filter; And the particulate in being stored in said first particulate filter is during greater than threshold level, and said exhaust line wire system is supplied to said second particulate filter with exhaust.
3. vent systems according to claim 1, wherein said second particulate filter is around said first particulate filter.
4. vent systems according to claim 1, it further comprises the preloaded spring that said suction valve is biased in operating position.
5. vent systems according to claim 1, it further comprises the outlet valve that places said second particulate filter and the said first particulate filter downstream.
6. vent systems according to claim 5, it further comprises the preloaded spring that said outlet valve is biased in operating position.
7. vent systems according to claim 1, it further comprises the pressure transducer that is positioned in the said first particulate filter upper reaches.
8. vent systems according to claim 7, it further comprises the pressure transducer that is positioned in the said second particulate filter downstream.
9. vent systems according to claim 1, it further comprises suction valve position transducer, exhaust valve positions sensor and the temperature transducer that is positioned at the said second particulate filter upper reaches.
10. exhaust gas-cleaning method, it comprises:
When the amount of soot of in said first particulate filter, storing during, will only guide to first particulate filter from the exhaust of motor less than threshold value; And
When the amount of soot of in said first particulate filter, storing during greater than threshold value, will guide to second particulate filter from the exhaust of said motor, said second particulate filter is contiguous and around said first particulate filter.
11. method according to claim 10, it further is included in combustion air-fuel mixture in the motor, thereby produces said exhaust, and wherein confirms to be stored in the amount of soot in said first particulate filter through the exhaust back pressure that increases.
12. method according to claim 11; Wherein during the condition of amount of soot in being stored in said first particulate filter greater than threshold quantity; The filter efficiency of said first particulate filter descends from specified filter efficiency, and exhaust back pressure remains on below the threshold level.
13. method according to claim 10; It further comprises when blast air being guided to said second particulate filter; Said first particulate filter of regenerating; And further be included in during said first particulate filter of regeneration, open and the closed suction valve of regulating the air-flow that flows to said second particulate filter.
14. method according to claim 13, it further is included in after said first particulate filter of regeneration, and engine exhaust is only guided through said first particulate filter.
15. the method for a purifying engine exhaust, it comprises:
Air-fuel mixture in the combustion engine;
When the pressure at the first particulate filter upper reaches during, will only guide to said first particulate filter from the exhaust of said motor less than threshold quantity; And
When the exhaust pressure at the said first particulate filter upper reaches overcomes spring force, will guide to second particulate filter from the exhaust of said motor, wherein said second particulate filter is around the part of said first particulate filter.
16. method according to claim 15 is wherein through suction valve and outlet valve directing exhaust gas.
17. method according to claim 16, it further comprises when exhaust being guided to said second particulate filter, said first particulate filter of regenerating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011003019.0 | 2011-01-24 | ||
| DE102011003019A DE102011003019A1 (en) | 2011-01-24 | 2011-01-24 | Particulate filter and method for purifying an exhaust gas stream |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102606258A true CN102606258A (en) | 2012-07-25 |
Family
ID=46510677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100176584A Pending CN102606258A (en) | 2011-01-24 | 2012-01-19 | Particle filter and method for the purification of an exhaust-gas flow |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20120186228A1 (en) |
| CN (1) | CN102606258A (en) |
| DE (1) | DE102011003019A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112771255A (en) * | 2018-09-28 | 2021-05-07 | 康明斯排放处理公司 | System and method for dynamically controlling filtration efficiency and fuel economy |
| CN114087057A (en) * | 2022-01-10 | 2022-02-25 | 潍柴动力股份有限公司 | double-DPF removal monitoring method and device and engine |
| CN114320551A (en) * | 2021-11-10 | 2022-04-12 | 枣庄科技职业学院 | Automobile exhaust muffler device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6136351B2 (en) * | 2013-02-22 | 2017-05-31 | いすゞ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
| US9702307B2 (en) | 2013-09-05 | 2017-07-11 | Ford Global Technologies, Llc | Method for controlling fuel pressure for a LPG engine |
| DE102014016420B4 (en) * | 2014-11-06 | 2023-05-17 | Audi Ag | Method for operating a motor vehicle and corresponding motor vehicle |
| DE102018203300B4 (en) | 2018-03-06 | 2023-07-06 | Ford Global Technologies, Llc | Arrangement of an internal combustion engine with an exhaust tract, motor vehicle and method for controlling exhaust gas aftertreatment |
| KR20200104504A (en) * | 2019-02-27 | 2020-09-04 | 현대자동차주식회사 | Engine emission treatment system of vehicle |
| CN113074035B (en) * | 2021-05-07 | 2022-07-19 | 潍柴动力股份有限公司 | DPF carbon loading capacity estimation method, device and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1768193A (en) * | 2003-04-01 | 2006-05-03 | 圣-戈班欧洲研发中心 | Filtration structure for the exhaust gas from an internal combustion engine |
| FR2880914A1 (en) * | 2005-01-14 | 2006-07-21 | Peugeot Citroen Automobiles Sa | Exhaust line for e.g. diesel engine, has particle filter unit comprising particle filters in which one filter is connected in parallel to another filter via valve that controls circulation or interruption of gas in filter |
| CN1902384A (en) * | 2003-11-25 | 2007-01-24 | 巴布考克日立株式会社 | Particulate matter-containing exhaust emission controlling filter, exhaust emission controlling method and device |
| CN101095994A (en) * | 2006-06-30 | 2008-01-02 | 陈友年 | Waste gases filtering equipment |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4264344A (en) * | 1980-02-06 | 1981-04-28 | General Motors Corporation | Diesel engine exhaust particulate trap |
| JPH03294614A (en) * | 1990-04-09 | 1991-12-25 | Riken Corp | Exhaust emission purifier |
| JPH07279646A (en) * | 1994-04-01 | 1995-10-27 | Isuzu Ceramics Kenkyusho:Kk | Diesel particulate filter |
| US6875343B2 (en) * | 2001-07-10 | 2005-04-05 | Spx Corporation | Dual direction bypass valve |
| DE10206805A1 (en) | 2002-02-19 | 2003-08-28 | Bosch Gmbh Robert | Soot filter for cleaning I.C. engine exhaust gases, has device for reducing exhaust gas counter pressure with predetermined breaking point in filter body of filter and/or in by-pass line of filter |
| DE10233945B4 (en) * | 2002-07-25 | 2005-09-22 | Siemens Ag | Process for cleaning a particulate filter |
| DE102005012942B4 (en) * | 2005-03-21 | 2018-12-13 | Robert Bosch Gmbh | Method and device for operating an internal combustion engine |
-
2011
- 2011-01-24 DE DE102011003019A patent/DE102011003019A1/en not_active Ceased
-
2012
- 2012-01-17 US US13/352,078 patent/US20120186228A1/en not_active Abandoned
- 2012-01-19 CN CN2012100176584A patent/CN102606258A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1768193A (en) * | 2003-04-01 | 2006-05-03 | 圣-戈班欧洲研发中心 | Filtration structure for the exhaust gas from an internal combustion engine |
| CN1902384A (en) * | 2003-11-25 | 2007-01-24 | 巴布考克日立株式会社 | Particulate matter-containing exhaust emission controlling filter, exhaust emission controlling method and device |
| FR2880914A1 (en) * | 2005-01-14 | 2006-07-21 | Peugeot Citroen Automobiles Sa | Exhaust line for e.g. diesel engine, has particle filter unit comprising particle filters in which one filter is connected in parallel to another filter via valve that controls circulation or interruption of gas in filter |
| CN101095994A (en) * | 2006-06-30 | 2008-01-02 | 陈友年 | Waste gases filtering equipment |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112771255A (en) * | 2018-09-28 | 2021-05-07 | 康明斯排放处理公司 | System and method for dynamically controlling filtration efficiency and fuel economy |
| CN114320551A (en) * | 2021-11-10 | 2022-04-12 | 枣庄科技职业学院 | Automobile exhaust muffler device |
| CN114087057A (en) * | 2022-01-10 | 2022-02-25 | 潍柴动力股份有限公司 | double-DPF removal monitoring method and device and engine |
| CN114087057B (en) * | 2022-01-10 | 2022-04-12 | 潍柴动力股份有限公司 | double-DPF removal monitoring method and device and engine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102011003019A1 (en) | 2012-07-26 |
| US20120186228A1 (en) | 2012-07-26 |
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Application publication date: 20120725 |