CN102213130A - Method for regenerating a particulate filter and motor vehicle - Google Patents
Method for regenerating a particulate filter and motor vehicle Download PDFInfo
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- CN102213130A CN102213130A CN2011100718070A CN201110071807A CN102213130A CN 102213130 A CN102213130 A CN 102213130A CN 2011100718070 A CN2011100718070 A CN 2011100718070A CN 201110071807 A CN201110071807 A CN 201110071807A CN 102213130 A CN102213130 A CN 102213130A
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- regeneration
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- particulate filter
- diesel particulate
- starting point
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
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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
- F01N3/033—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 in combination with other devices
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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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
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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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
- F02D2200/701—Information about vehicle position, e.g. from navigation system or GPS signal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
- F02D2200/702—Road conditions
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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
A method for regenerating a diesel particulate filter of a motor vehicle having a navigation system, where the method comprises determining if the filter requires regeneration, if so determining if a the future route is known, if known determining if optimum regeneration is possible and if it is possible determining a desired start point and end point of the regeneration based on the planned route, using a navigation system, and initiating and ending the regeneration at the determined points. The start point conditions may include reaching a geographic location and the end point conditions may include reaching a geographic location and reaching an elapsed time after regeneration starts. Preferably the start point is determined by determining at least one of the type of road, expected speed, expected terrain and expected traffic conditions. If the optimal conditions for regeneration are not met it may be determined if the particulate filter is overloaded and if so the best start and stop points are determined for carrying out a forced regeneration.
Description
Technical field
The present invention relates to motor vehicle, the method for the diesel particulate filter that relating in particular to is used to regenerate is mounted to motor vehicle and implement the motor vehicle of this method.
Background technique
(diesel particulate filter DPF) is used for the vent systems of explosive motor (particularly diesel engine) to capture and to remove the particulate matter that is mainly formed by carbon-based material to particulate filter.When engine exhaust passes DPF, particulate is trapped in the filter and in time and builds up.The resistance that this accumulation causes stream to pass the exhaust of DPF increases, thus and the back pressure of increase motor.The increase of back pressure has adverse influence to engine running, particularly to fuel consumption.For back pressure is decreased to acceptable degree, the particulate (its most of incendivity) by burning accumulation is periodically regenerated DPF.
For a plurality of reasons, DPF when needed should only regenerate.
At first, the filter efficiency of DPF increases along with the increase of particulate loading.
Secondly, in order to realize regeneration, delivery temperature must be increased to the temperature that is higher than between the normal engine on-stream period, and therefore regeneration causes higher fuel consumption and dilutes engine motor oil potentially.
Once more, when particulate loading enough high and when being uniformly distributed in filter regeneration be full blast.
Have multiple conventional method can be used for increasing delivery temperature to required degree (for example being higher than 450 ℃) in case the beginning regeneration event.Regardless of the method that is used to increase delivery temperature, need all to estimate that the load of DPF is so that begin regeneration event with optimal spacing.
The DPF load can come out from the parametric inference that depends on engine operating condition, maybe can and find the solution the equation of describing the relation between the pressure that passes the mass flow rate of DPF and responded to and come more directly to measure by the exhaust pressure between the upstream and downstream of induction DPF.The dependence to the load of building up in the DPF has been set up in the operative constraint of using in the equation.Obtain operative constraint and find the solution the equation of describing the operative constraint that is used for this load subsequently by solving equation at first, can estimate the load of DPF.
The generation that is used to begin and continue the situation of regeneration will relate generally to the temperature that improves the exhaust that enters DPF to suitable high temperature and because diesel engine is colder relatively usually and with lean-burn operation, and the back injection of diesel fuel is generally used for improving the delivery temperature that enters DPF and still stays too much oxygen simultaneously and be used to the particulate matter that burns and capture.
Although can carry out regeneration under multiple situation, desirable situation is to turn round with relative higher load under the stable state situation relatively when motor.When just cruising with relative fair speed, vehicle has this situation on expressway.In these cases, can manage regenerative process and the vehicle drive performance is had less or do not have considerable influence, and realize the delivery temperature of required raising easily.Opposite with optimal cases, driving for regeneration in the ground mode that loiters in the city is not desirable situation, because be difficult to produce required high temperature and driving loss of energy in some cases is difficult to accept.
And in some cases, shorter because this city stroke continues usually, can not finish regeneration, because the driver stopped stroke before regeneration.
The prior art problems of the method for many DPF that are used to regenerate is, exists predetermined soot load just to begin regeneration as soon as possible among the DPF in case be estimated to, this can cause not exclusively or the probability of poor efficiency regeneration higher relatively because it does not consider the operating mode of motor vehicle.
Summary of the invention
The object of the present invention is to provide a kind of method that is used for diesel regenerated particulate filter, the operating mode of its adaline motor vehicle and the situation of diesel particulate filter are so that minimize the risk of insufficient or inefficient regeneration.
According to a first aspect of the invention, a kind of method of diesel particulate filter of the motor vehicle with navigation system of being used to regenerate is provided, wherein this method comprises and determines whether diesel particulate filter requires regeneration, if diesel particulate filter requires regeneration, determine then whether following route is known, if following route is known, determine that then best regeneration whether may for known route, if best regeneration is possible for known route, determine the desirable starting point of regeneration and the desirable end point of regeneration, begin regeneration and finish described regeneration when satisfying the starting point condition when satisfy the end point condition, wherein the starting point condition comprises that arriving specific geographical position on the known route and end point condition comprises and arrive special position on the known route and in the lapse of time that reaches predetermined after having begun of regenerating one.
The starting point condition can further comprise confirms that motor vehicle are higher than predetermined minimum speed and travel, confirm that motor is higher than the desired speed operation and confirms that motor is higher than in the predetermined load running at least one.
The end point condition comprise reach predetermined passage after reaching the specific geographical position that is arranged on the known route and regeneration has begun time at least one.
The desirable starting point of determining regeneration comprises the type of determining the road that will travel on the route, determine vehicle along the desired speed of a plurality of positions on this route, determine the desired landform of this route and determine for along in the desired traffic condition of a plurality of positions of this route at least one.
The desirable starting point of determining regeneration comprise according to navigation system determine will along the road type that travels, determine a plurality of positions vehicle on the route desired speed, determine desired route landform and determine in the traffic condition of a plurality of positions on the desired route at least one, based on the information of collecting, calculating optimum recovery time window (window time) in case minimize to fuel economy, engine oil pollute and/or one or more other factorses of influence regeneration quality at least one punishment.
If do not satisfy the optimum condition of regeneration, this method can further comprise determines whether diesel particulate filter transships, if the diesel particulate filter overload, the forced regeneration of execution diesel particulate filter.
This method further comprises most probable starting point and the end point of determining forced regeneration.
If following route is not known, then this method can further comprise the regeneration of carrying out diesel particulate filter based on historical data.
According to a second aspect of the invention, a kind of motor vehicle are provided, it has the diesel engine that supply is vented to diesel particulate filter, control the timing of the fuel in each cylinder that sprays the motivation of setting out and the electronic controller and the navigation system that can be connected to electronic controller of volume with turning round, wherein, electronic controller can determine whether diesel particulate filter requires regeneration with turning round, if diesel particulate filter requires regeneration, then determine by navigation system whether following route is known, if following route is known, determine that then best regeneration whether may for known route, if best regeneration is possible for known route, determine the desirable starting point of regeneration and the desirable end point of regeneration, begin the regeneration of diesel particulate filter and finish the regeneration of diesel particulate filter when satisfying the starting point condition when satisfying the end point condition, wherein the starting point condition comprises that arriving specific geographical position on the known route and end point condition comprises and arrive special position on the known route and reach in predetermined lapse of time one after regeneration has begun.
The starting point condition can further comprise confirms that motor vehicle are higher than predetermined minimum speed and travel, confirm that motor is higher than the desired speed operation and confirms that motor is higher than in the predetermined load running at least one.
The end point condition comprise reach predetermined passage after reaching the specific geographical position that is arranged on the known route and regeneration has begun time at least one.
The desirable starting point of determining regeneration comprises the type of determining the road that will travel on the route, determine vehicle along the desired speed of a plurality of positions on this route, determine the desired landform of this route and determine for along in the desired traffic condition of a plurality of positions of this route at least one.
If do not satisfy the optimum condition of regeneration, this method can further comprise determines whether diesel particulate filter transships, if the diesel particulate filter overload can further turn round to carry out the forced regeneration of diesel particulate filter.
This electronic controller further can be determined the most probable starting point and the end point of forced regeneration with turning round.
If following route is not known, then this electronic controller can further comprise the regeneration of carrying out diesel particulate filter based on historical data.
To by example the present invention be described with reference to the accompanying drawings.
Description of drawings
Fig. 1 is the signal representative graph of motor vehicle of structure according to an aspect of the present invention.
Fig. 2 is the high level flow chart that shows the method for the diesel particulate filter according to a further aspect of the invention that is used to regenerate.
Fig. 3 is the chart how Best Times of regeneration is provided for display algorithm, and it can be by the Matlab/Simulink program representation.
Fig. 4 is for showing the chart of fuel economy sex factor and time relationship.
Fig. 5 is the diagrammatic representation of the speed of a motor vehicle of true driving cycle with respect to the time.
Fig. 6 is the penalty β (t) of the driving cycle shown in Fig. 5 and the chart of time relationship.
Embodiment
Refer now to Fig. 1 and Fig. 2, it has shown the motor vehicle 1 with diesel engine 2, flow to diesel particulate filter DPF 6 via exhaust duct 5 and flows out to the atmosphere from DPF 6 via tailpipe 7 from the exhaust of diesel engine 2.
Although vehicle 1 is shown as the single prime mover that only has diesel engine 2 forms, should be appreciated that the mode that also can be commonly referred to the mixed power configuration provides the power (for example one or more electric motor) of other form.
Diesel engine 2 can be connected to electronic controller 3 with turning round, and its control fuel sprays the timing and the volume of a plurality of cylinders of the motivation 2 of setting out.In this example, electronic controller 3 is also controlled the regeneration of DPF6, and it will be described hereinafter in more detail.
Electronic controller 3 receives input from multiple source (comprising one or more vehicle sensors 8, one or more engine sensor 9 and navigation system 4 in this example).
Vehicle sensors 8 can comprise that for example one or more sensors are to provide car speed relevant information.
Engine sensor 9 for example can comprise the operating temperature of rotating speed about motor 2, driver's power demand, motor, from the delivery temperature of DPF 6 upstreams, from the exhaust pressure in DPF 6 downstreams with in the information of the delivery temperature of one or more positions.
Navigation system 4 uses the GPS technology with the current location of determining motor vehicle 1 and comprise the device of importing required destination.The device that is used to import this destination can comprise keyboard, rotation input device or be used for driver by motor vehicle 1 directly to be imported the pressure sensitive screen of destination or allows from other device or source (for example mobile phone address is thin or contacts list, computer address is thin or contacts list) to upload the destination or upload the device of destination from the internet.That is to say, the invention is not restricted to required destination is inputed to any specific device in the navigation system 4.
Navigation system 4 can be determined with turning round will be along its road type that travels.That is to say, road whether be in urban environment, path, residential quarter, main road or through street (for example expressway).
In some embodiments of the invention, navigation system 4 also is provided with geographic information so that for any known route, can determine route which partly be go up a slope, which partly is descending and which is partly for smooth generally.
In some other embodiments, navigation system 4 is provided with Real-time Traffic Information and for example can predicts because the traffic delays that accident, road work or obstruction cause.
In use, electronic controller 3 can determine whether DPF 6 requires regeneration with turning round.This can be by realizing based on the modeling technique of the historical data of engine running or by the pressure transducer that use is positioned at DPF 6 upstream and downstreams.For example U.S. Pat 6,405, and 528 have described a method of the load that is used for definite diesel particulate filter.
If DPF 6 requires regeneration, electronic controller 3 determines by navigation system 4 whether route in the future is known, that is to say, whether the destination has been set and has calculated the route that motor vehicle 1 is brought to required destination.If following route is known, electronic controller 3 can determine that best regeneration whether may for known route with turning round subsequently.This decision will comprise whether the type, prediction vehicle of the road that assessment will be travelled will may allow motor vehicle 1 to operate under the high load situation of relative stable state (for example best regeneration is required) at the time of travelling on the specific part of route and particular section route.If there are several sections that best regeneration can take place, subsequently electronic controller 3 will more a plurality of selections to determine which is preferred.This can comprise of choosing simply very fast generation and maybe can comprise the section of selecting uninterrupted regeneration possibility maximum or situation and be superior to of other possibility.
Electronic controller 3 can turn round subsequently with the desirable starting point of determining regeneration and the desirable end point of regeneration.This comprise for selected section route determine the section that regeneration will begin section start geographical position and geographical position that definite regeneration will finish or determine the predicted time of regeneration and corresponding to the required recovery time be set the timer endurance subsequently.When arriving initial geographical position, pick up counting device and when finishing it stops when regenerating.
In certain embodiments, the selection of starting point also can comprise the geographical pattern of the multi-region section of determining route and if possible select to provide main upward slope road route partly.That is to say that geography is used in sections of differentiating all potential suitable best regeneration between the multi-region section of route.
In some other embodiments, the selection of starting point can comprise that also the traffic condition of a plurality of parts of determining route and the stretch line that selection does not have traffic delays whether may.That is to say that traffic condition can be used in the section of differentiating all potential suitable best regeneration between the multi-region section of route.
Should be in certain embodiments, it be the desirable starting point of regeneration that geographical and traffic condition can be used with best highway section of determining regenerate and result together with understanding.
In one embodiment, the desirable starting point of determining regeneration comprise according to navigation system determine will along the road type that travels, determine along a plurality of positions vehicle on the route desired speed, determine the desired landform of route and determine along in the desired traffic condition of a plurality of positions on the route at least one, based on the information of collecting, calculating optimum recovery time window (window time) in case minimize to fuel economy, engine oil pollute and/or one or more other factorses of influence regeneration quality at least one punishment.
In certain embodiments, whether electronic controller 3 can further be provided in fact just travelling with the speed of expectation and/or checking according to engine sensor 9 whether whether motor just operating under the desired load with rotating speed rotation or the motor of expecting before execution is regenerated according to vehicle sensors 8 inspections motor vehicle 1 before execution is regenerated.That is to say, although all can indicate motor vehicle to travel with relative high speed/high load from the information of navigation system, because unpredictalbe situation (for example foul weather or accident) may not be like this.
In case all are ready for regeneration, when satisfying the starting point condition, by increase to spray in the motivation 2 of setting out volume of fuel and by using one or more backs or inferior back fuel injection retardation fuel to spray the regeneration of the timing electronic controllers 3 beginning DPF 6 in the motivation 2 of setting out.Its effect is the level that increases to the soot of the accumulation of can burning with the delivery temperature that will enter DPF 6.When the end point condition had satisfied, controller can turn round with the regeneration that finishes DPF 6 subsequently and supply fuel to motor 2 interior timing and volumes and return to normal operation.
If do not satisfy the optimum condition of regeneration for known route, whether electronic controller 3 further running transships with definite DPF 6, that is to say that the particulate of accumulation (soot) is to such an extent as to much influence the Economy running of motor 2 or the emission performance of motor vehicle 1.
If DPF 6 overloads, electronic controller 3 can turn round subsequently to carry out the forced regeneration of DPF 6.Although forced regeneration is that the condition of regeneration is undesirable, regeneration takes place so that the regeneration of at least some in the particulate of removal accumulation in DPF 6.
In certain embodiments, electronic controller 3 further turns round to determine the best start point and the end point of forced regeneration.That is to say that selection will cause oil dilution, fuel to use and minimum starting point and the end point of cornering ability loss.
If following route is not known, electronic controller 3 can further turn round to carry out diesel particulate filter regeneration based on historical data.That is to say that even route is not set as yet, the regeneration of DPF 6 also is possible.In this case, historical data is used to determine when starting regeneration.That is to say, will be used to estimate the travel type of today about the data of stroke last time.Even the destination is not set as yet, when navigation system 4 is the best prediction that reduces regeneration if still can providing the details of current geographic position and make in conjunction with historical data in view of the above.For example, if historical data indication weekend motor vehicle 1 be that weekend and current geographical position coincide with expressway often along expressway travel several miles and today, this indicates preferably preferably to carry out now and regenerates subsequently.Yet, if historical data indication from Mon-Fri motor vehicle 1 often with the mode that loiters along town road driving and navigation system indication motor vehicle 1 current just on this road and today be Tuesday, indication is the poorest time that begins to regenerate now subsequently.
Although above with reference to determine that the embodiment that the required logical operation of starting point and end point is all carried out has described the present invention electronic controller 3 in, should be appreciated that these unnecessary such and these computings can carry out and only control signal is sent to electronic controller 3 outside navigation system 4.And, be that electronic controller 3 can comprise a plurality of interconnected controllers or electronic controller 3 and navigation system 4 and can form individual unit with should be appreciated that.
Refer now to Fig. 2, shown the method that is used for diesel regenerated particulate filter according to embodiments of the invention.
This method begins at frame 100 places, its (key on) incident of can lighting a fire in response to key.At frame 110 places, determine whether DPF 6 needs regeneration subsequently.Should determine can for arbitrarily easily the model that for example uses from the DPF 6 of previous regeneration of mode or by measure that the pressure that is produced by current particulate loading falls and with current pressure fall with predetermined value relatively.For Europe V emission regulation, there is the method for two main estimation soot loads.First method (closed loop) is based on the pressure difference estimation soot at measured DPF two ends.For the given row air-flow, the soot of the high more then storage of pressure is high more.Second method (open loop) calculated based on generating as the motor flue gas of measuring on ergometer.By monitoring from the flue gas of motor and the soot figure that is used to produce under the operating mode of certain limit carry out by a second integration.The data of this accumulation can be used for the particulate based on the accumulation in the DPF 6 in use estimation a period of time of motor vehicle 1 subsequently.
If DPF 6 does not require regeneration, then method cycles back to frame 100.In this example, method can directly continue to be back to frame 110 or its and can work as when next key ignition event takes place and begin once more.
If at frame 110 places, the regeneration of determining DPF 6 is favourable, subsequently at frame 120 places, it determines whether following route is known.This is a simple example of determining whether the destination of current stroke has been provided with.If answer to not, method branches to frame 170 subsequently, to such an extent as to it is determined DPF 6 whether very saturated suggestion is regenerated immediately at 170 places in described example.If DPF 6 does not transship, method cycles back to frame 100 subsequently.As previously mentioned, method can directly cycle back to frame 110 or it can restart subsequently when the key ignition event takes place.In other embodiments, frame 170 can omit and method directly advances to frame 175.
If at frame 170 places, determine then to regenerate based on the historical data management that is stored in the electronic controller 3 at frame 175 places owing to DPF 6 overloads need regeneration.That is to say that even the destination is not known, the data of the past period by analyzing navigation system can draw the style of driving behavior.For example, motor can be avoided regeneration for long stroke plan regeneration at weekend and for short workaday round trip.In order to avoid the peak stroke, another example can be avoided the peak period traffic congestion.This method advances to frame as described below 180 places subsequently.
Be back to frame 120, if route is known, this method advances to frame 130 places subsequently, the optimum condition of determining beginning and finishing to regenerate at this place.At frame 130 places, establish during the optimal engine load and the required Best Times of regenerating.For example, can determine that in order to realize fully regeneration based on current particulate loading motor 2 must must travel 8 minutes or extraction flow must be higher than 150kg/h and continues 7 minutes with the least disadvantage of realizing fuel economy and the best regeneration of oil dilution minimum with the speed that is higher than 100km/h with 40% load running 6 minutes or vehicle.
At frame 140 places, whether the parameter that frame 130 places are provided with is compared with the information of known route meets required parameter with arbitrary zone of determining route subsequently.Be possible and will determine also that with after-frame 140 which the best of selected section meets the optimum condition of regeneration for long these parameters of a plurality of region conforms of stroke.Be that a plurality of sections can overlap each other and section needn't root be the continuous part of route with should be appreciated that.If all suitable sections are identical meeting, select for the first time chance subsequently generally with regeneration DPF 6.If but there is less difference, select best possible route section subsequently.In certain embodiments, this selection can comprise the information of using relevant multiple section geography or real-time traffic situation.For example, the main section that goes up a slope will be preferable over horizontal section and horizontal section will be preferable over main descending section.The section that similarly has unknown delays will be more more preferred than the section with known delay.
From frame 140, generate the predetermined starting point and the predetermined end point that are used to regenerate.Starting point comprises usually and cause the Geographic Reference that begins to regenerate when reaching.But also can comprise further test or some other parameters to car speed.Such as but not limited to, the starting point condition can be configured to " if current location is spent 10 minutes and 28.5 seconds for north 51; West 0 degree 7 minutes 40.67 seconds and current car speed are higher than 100km/h to begin regeneration subsequently and seeks next time chance in addition with in optimum condition regeneration ".It is the combination of the instantaneous operating mode (for example engine speed, engine load and extraction flow) that can use geographical position and motor vehicle 1 or motor 2 with should be appreciated that.
End point can be that the ground geo point maybe can be regeneration beginning back amount of time in the past simply.
Subsequently at frame 150 places, regulate the volume of the fuel that sprays the motivation 2 of setting out and timing so that delivery temperature is increased to of the regeneration of the temperature (for example 470 ℃ to 500 ℃) of suitable dpf regeneration according to starting point that frame 140 in, is provided with and end point generation DPF 6 by electronic controller 3.
Method advances to frame 180 subsequently, determines at this place whether regeneration is successful.This can be based on whether having for the required time period that ideal condition is estimated or can falling by the pressure at direct measurement DPF 6 two ends.
If confirm that at frame 180 places regeneration is successful, then method finishes at frame 190 places otherwise method goes to frame 100, locates direct execution in step 110 and this method reruns at this in this example.
If determine known route is not taken place the condition of best regeneration at frame 140 places, then method branches to frame 145 subsequently, determines DPF 6 whether very saturated suggestion is regenerated immediately to such an extent as to locate it at this.If DPF 6 does not transship, method cycles back to frame 100 subsequently.As mentioned above, method can directly continue back frame 110 or its subsequently and can work as when next connection incident takes place and restart.
If at frame 145 places, determine owing to DPF 6 overloads need regeneration, subsequently based on standard conditions management regeneration.That is to say that use standard or predetermined supply of fuel volume and positive duration begin regeneration.As mentioned above, method advances to frame 180 subsequently.
Although in Fig. 2, do not show, in certain embodiments, even failed to indicate current route to be not suitable for best regeneration in the test at frame 140 places, if determine at frame 145 places must to carry out regeneration because the DPF load is too high with infringement engine performance and exhaust performance, then the method step that can comprise the best start point of determining known route and end point begins to regenerate under best possible condition guaranteeing as soon as possible.That is to say, be not the regeneration that begins DPF 6 immediately, the stretch line of the optimum condition that is used to regenerate occurs but can postpone to regenerate in arriving known route.
Refer now to Fig. 3 to 6, based on navigation system and use input (for example Qi Wang destination, traffic condition, the gradient etc.), can estimate following car speed plotted curve and represent by following formula (1):
V (t) or v (s) (1)
Depend on whether velocity curve is expressed as the function in route time or vehicle geographical position.
Below the description of this system is based on the time, but the formula that is based on the space is equal to.
If we will punish function as giving a definition:
And
Wherein
ψ
1(t), ψ
2(t) ... ψ
n(t) factor (fuel economy, oil pollution, engine emission, the power of regeneration of the quality of regeneration described in representative ...) in each and its can be associated with car speed and therefore be associated with the route time.
If each penalty factor is also with identical interval ψ
n(t) ∈ (0,1) definition, penalty is constrained to φ (t) ∈ (0,1).
For example, the fuel economy sex factor can be defined like that by curve shown in Fig. 4, and wherein 0 meaning generative fuel punishment is very high, and therefore 1 means that regeneration punishment is low.
If we will
Being defined as weighting function distributes different weights to penalty factor with the significance that depends on them.For example, if it is more beneficial than oil pollution to optimize fuel economy, will be bigger then
Be dispensed to a factor but not another.
Purpose is to find the penalty of maximum of ensuing whole known or estimation route subsequently.
If desired timing definition is t in the regeneration
Reg(for example 600 seconds) can define subsequently about beginning to continue t
RegHow favourable the regeneration of time be favourable or penalty β (t), and wherein maximum value is drawn by formula (4):
Maximum value has defined the best regeneration window of whole expectation route.Yet, be not the size of favourable maximum value β (t), but when it takes place time in the route or position.That is, in this case, as regeneration beginning t
RegThe time of second before can finishing as the optimum condition that in penalty, defines.Above-mentioned algorithm can be with as shown in Figure 3
Block diagram in carry out.
In a non-restrictive example, actual drive circulation and be input into system in and with as shown in Figure 5 v (t) and define penalty based on two penalty factor " oil dilution " and " fuel economies " with equal weight.
It is in this, carries out integration and shown the result of β (t) in Fig. 6.
According to this function, can draw maximum value and time that regeneration takes place.Under the situation shown in Fig. 6, the maximum value of β (t) was located at 1258 seconds to take place.This means that best regeneration should finish in circulation beginning 1258 seconds (point " P " on the chart is indicated) in lasting 600 seconds afterwards.
Therefore, best regeneration begin after should 658 seconds after circulation beginning or begin afterwards for the same geographic location based on the system in space, and wherein last result is geographical starting point.
Therefore, in sum, only the regeneration of DPF 6 may take place when occurring in the optimum condition when regeneration, thereby reduces that insufficient regeneration, too much fuel are used, risk that too much oil dilution and relatively poor cornering ability take place.
Be current unnecessary the meaning of on the expressway, travelling of vehicle will successful regeneration to take place with should be appreciated that.Motor vehicle can for example can be near its final destination near the end section or the motor vehicle of expressway.Yet in the example of the method according to this invention, by measuring known route and selecting to take place the section of optimum condition according to the time period of suitable vehicle working condition and expectation, possibility that can succeed or regeneration fully is the highest.
Be with it will be understood by a person skilled in the art that, although described the present invention by the one or more embodiments of exemplary reference, it is not limited to the disclosed embodiments and can constructs one or more modifications or alternate embodiments to disclosed embodiment and do not depart from scope of the present invention.
Claims (8)
1. the method for the diesel particulate filter of the motor vehicle of being used to regenerate with navigation system, it is characterized in that, described method comprises determines whether described diesel particulate filter requires regeneration, if described diesel particulate filter requires regeneration, determine then whether following route is known, if described following route is known, determine that then best regeneration whether may for described known route, if best regeneration is possible for known route, then determine the desirable starting point of described regeneration and the desirable end point of described regeneration, begin regeneration and finish described regeneration when satisfying described starting point condition when satisfying described end point condition, wherein said starting point condition comprises that arriving specific geographical position on the described known route and described end point condition comprises and arrive special position on the described known route and in the lapse of time that reaches predetermined after having begun of regenerating one.
2. the method for claim 1, it is characterized in that, the desirable starting point of determining described regeneration comprise determine will along the road type that travels on the described route, determine along the described vehicle in a plurality of positions on the described route desired speed, determine the desired landform of described route and determine along in the desired traffic condition of a plurality of positions on the described route at least one.
3. method as claimed in claim 1 or 2, it is characterized in that, if do not satisfy the described optimum condition that is used to regenerate, described method also comprises determines whether described diesel particulate filter transships, if and described diesel particulate filter is then carried out the forced regeneration of described diesel particulate filter for transshipping.
4. method as claimed in claim 3 is characterized in that, described method also comprises the best that is identified for described forced regeneration may starting point and end point.
5. one kind has the diesel engine that supply is vented to diesel particulate filter, control fuel sprays the electronic controller of timing in each cylinder of described motor into and volume and can be connected to the motor vehicle of the navigation system of described electronic controller with turning round, it is characterized in that, described electronic controller can be used for determining whether described diesel particulate filter requires regeneration with turning round, if and described diesel particulate filter requires regeneration, determine according to navigation system whether described following route is known, if and described following route is known, determine that best regeneration whether may for described known route, if and the best regeneration of described known route is possible, determine the desirable end point of the desirable starting point of described regeneration and described regeneration and when satisfying described starting point condition, begin the described regeneration of described diesel particulate filter and when satisfying described end point condition, finish the described regeneration of described diesel particulate filter that wherein said starting point condition comprises that the specific geographical position that arrives on the described known route and described end point condition comprise and arrives special position on the described known route and reach in predetermined lapse of time one after regeneration has begun.
6. motor vehicle as claimed in claim 5, it is characterized in that, according to described navigation system determine the desirable starting point of described regeneration comprise determine will along the road type that travels, along the desired landform of the desired speed of the described vehicle in a plurality of positions on the described route, described route and along in the desired traffic condition of a plurality of positions on the described route at least one.
7. as claim 5 or 6 described motor vehicle, it is characterized in that, if do not satisfy the described optimum condition of regeneration for described known route, described electronic controller can be used for further determining whether described diesel particulate filter transships with turning round, if and described diesel particulate filter is overload, then described electronic controller further running is used to carry out the forced regeneration of described diesel particulate filter.
8. motor vehicle as claimed in claim 7 is characterized in that, described electronic controller further running is used for determining that the best of described forced regeneration may starting point and end point.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| GB1005562.2 | 2010-04-01 | ||
| GB1005562.2A GB2479196B (en) | 2010-04-01 | 2010-04-01 | A method for regenerating a particulate filter |
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| Publication Number | Publication Date |
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| CN102213130A true CN102213130A (en) | 2011-10-12 |
| CN102213130B CN102213130B (en) | 2016-01-06 |
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| CN201110071807.0A Expired - Fee Related CN102213130B (en) | 2010-04-01 | 2011-03-24 | For method and the motor vehicle of regeneration of particle filters |
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| GB (1) | GB2479196B (en) |
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| CN114776419B (en) * | 2022-05-10 | 2023-11-17 | 潍柴动力股份有限公司 | DPF regeneration control method, system, vehicle and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201005562D0 (en) | 2010-05-19 |
| GB2479196B (en) | 2016-10-26 |
| CN102213130B (en) | 2016-01-06 |
| GB2479196A (en) | 2011-10-05 |
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