WO2012127044A1 - Verfahren und vorrichtung zur dosierung des additivs zur regenerierung eines dieselpartikelfilters - Google Patents
Verfahren und vorrichtung zur dosierung des additivs zur regenerierung eines dieselpartikelfilters Download PDFInfo
- Publication number
- WO2012127044A1 WO2012127044A1 PCT/EP2012/055243 EP2012055243W WO2012127044A1 WO 2012127044 A1 WO2012127044 A1 WO 2012127044A1 EP 2012055243 W EP2012055243 W EP 2012055243W WO 2012127044 A1 WO2012127044 A1 WO 2012127044A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- regeneration
- air mass
- particulate filter
- additive
- load
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—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
-
- 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
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
-
- 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
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/04—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by adding non-fuel substances to combustion air or fuel, e.g. additives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/01—Adding substances to exhaust gases the substance being catalytic material in liquid form
-
- 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
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0812—Particle filter loading
-
- 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
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
-
- 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
Definitions
- the invention relates to a method and a device for metering an additive for a regeneration process and determining a start time of a regeneration process of a particulate filter activated in the exhaust gas line of an internal combustion engine, in particular a diesel engine.
- the invention further relates to a system for particle filtration for an internal combustion engine, in particular a diesel engine.
- the invention further relates to a method for retrofitting an internal combustion engine, in particular a diesel engine, with a system for particle filtration.
- particulate filters are switched on in the exhaust gas line of diesel engines in order to reduce particulate emissions, in particular soot ejection.
- the particles collect on the filter surface of the particulate filter or in its filter medium.
- Rußabbrand occurs automatically when the exhaust gas flowing to the particulate filter is higher than the ignition temperature of the soot.
- fuel additives may be used. By the addition of such additives at a temperature below the Rußzündtemperatur, but above the Rußzündtemperatur with additives so can also be an ignition.
- the exhaust gas temperature usually exceeds the Rußzündtemperatur or this with the addition of additives, when the diesel engine over a certain period of time under a certain load operates.
- active regeneration processes are used. This is done by supplying thermal energy, such as via thermoelectric heating elements or by injecting fuel into the exhaust stream.
- filter elements for example, sintered metal filter or ceramic filter elements, for example based on silicon carbide, cordierite or aluminum titanate, an upper and a lower limit for the soot loading between which a regeneration runs optimally.
- the soot loading must therefore be monitored and as soon as the application is in the optimal "soot window", a suitable time must be determined to ignite the regeneration.
- the fuel content in the tank is often measured via the fuel gauge. With the measured amount of fuel, the required amount of additive is calculated and metered by a metering pump in the fuel tank.
- the patent EP 1 509 691 B1 describes the start of a regeneration depending on the soot loading on the filter.
- the pressure difference in the exhaust aftertreatment system before and after the particulate filter is determined.
- a theoretical particle loading is calculated and the loading state of the particle filter is determined from the comparison of the theoretical particle loading with the particle charge measured from the pressure difference, the exhaust gas temperature minus an evaluation threshold being integrated over a predetermined time to calculate the theoretical particle load.
- An additive is added to the fuel when the loading condition of the particulate filter has exceeded a certain threshold. The amount of added additive can be done depending on the concentration of the additive in the tank.
- the patent EP 1 583 892 B1 describes a method for controlling the activation of a heating device for regenerating a particle filter which is switched into the exhaust gas line of an internal combustion engine.
- the by the Particulate filter detected exhaust back pressure detected as a measure of the soot load condition of the particulate filter and the exhaust back pressure is measured when the engine is idling and the exhaust gas recirculation is turned off.
- the exhaust gas backpressure signal is compared with a threshold value representing sufficient soot loading for triggering a regeneration of the particulate filter.
- the heating device for triggering the regeneration process is released when the detected exhaust backpressure signal is greater than the threshold value.
- the disadvantage of this is that the measurement of the exhaust back pressure can not be made during normal operation, but only at idle.
- an at least two-stage method for determining the starting time of the regeneration process of a particulate filter switched into the exhaust gas line of an internal combustion engine is known.
- the current soot loading condition of the particulate filter is determined. This is compared with a characteristic map, constructed from data representing the soot loading necessary for a regeneration process with sufficient regeneration success in the case of different operating states of the internal combustion engine. If the currently determined soot load is greater than or equal to the minimum soot load required by the map, a "Load OK" flag is set.
- the anticipated regeneration success is determined if, at the time of the determination, the regeneration process would be triggered as a function of the current operating state of the internal combustion engine. If this regeneration success is sufficient, a "Regeneration Start” flag is set.
- EP 2 252 780 discloses a method for determining the loading state of a particle filter which is switched into the exhaust gas line of an internal combustion engine, in particular a diesel engine, comprising the following steps: determining the exhaust gas volume flow in the flow direction of the exhaust gas behind the particle filter; Detecting the pressure prevailing in the exhaust gas line in the flow direction of the exhaust gas upstream of the particle filter; Comparing the exhaust gas volume flow determined in the flow direction behind the particle filter with the detected pressure prevailing upstream of the particle filter; and evaluating the result of the comparison, taking into account the exhaust backpressure provided by the unloaded particulate filter with respect to the exhaust back pressure caused by the particulate filter loading.
- EP 1 736 653 describes the metering of the additive for regenerating a diesel particulate filter as a function of the operating conditions of a motor vehicle.
- EP 0 488 831 discloses the metered addition of an additive for regenerating a diesel particulate filter as a function of engine load.
- the soot production of the engine is measured with a control unit.
- the soot production can be measured and evaluated by the current filter load and via existing maps that are stored in the control unit. With the measured amount of soot, the correct mixing ratio can be calculated and adjusted.
- the invention therefore provides a method for metering an additive for a regeneration process of a particle filter which is switched into the exhaust gas line of an internal combustion engine, in particular a diesel engine, wherein the amount of additive to be metered is calculated from the soot production of the internal combustion engine.
- the soot production of the internal combustion engine is preferably calculated from the filter load.
- the filter loading is calculated from the data of an air mass meter and a differential pressure sensor using maps.
- the exhaust gas temperature can also be used for the calculation.
- the degree of success of a regeneration cycle of the diesel particulate filter is determined to determine the amount of additive to be metered. This can be done, for example, by comparing the differential pressure (or also the pressure loss) before the regeneration process with the differential pressure after the regeneration process.
- the degree of success thus determined is compared with a degree of success. If the pressure loss due to the regeneration is not reduced to a sufficient extent as defined for the application and / or the particle filter, a sufficient degree of success has not been achieved. In this case, a further amount of the additive is added to the fuel supply. This can in particular be repeated until a predetermined, sufficient degree of success has been achieved. Once the degree of success has been achieved, no additional additive is added to the fuel supply. This step can in particular be repeated regularly after each regeneration process.
- an optimal amount of the regeneration additive can be added.
- the additive concentration can be set optimally to a desired degree of success, without having to know or consider the properties of the internal combustion engine or the design of the exhaust system. Since the method according to the invention can calculate the correct mixing ratio of additive to fuel, the usually inaccurate fuel gauge is no longer absolutely necessary. This is particularly advantageous for retrofit solutions, since reliable connection to the fuel gauge is not required and thus the cabling and also the control can be less complex and therefore cheaper. Overall, a more accurate dosage and thus an optimized additive consumption can be achieved, in particular such that only the amount of additive is added, which is required for the achievement of a predetermined degree of success.
- the method is still used for the process to the signal of a fuel gauge. This takes place in such a way that the amount of fuel taken up in a first refueling operation is determined and in particular stored. Furthermore, the amount of additive that was added to the fuel supply after this first refueling operation is stored until a desired degree of regeneration has been achieved. From these values, a ratio between additive amount and fuel quantity (in particular the volume ratio) is calculated. In another refueling process, the tank quantity of the consumed fuel is determined. Subsequently, according to the previously determined ratio, an additive amount is metered in, with which the ratio determined after the first refueling process can be established.
- an additive amount is added which is insufficient to produce the ratio determined after the first refueling operation, but for example only 90% or 95% of this ratio.
- the dosing strategy can be combined with a method for determining a start time of a regeneration process of a combustion process in the exhaust gas line of a combustion engine, in particular a diesel engine, activated particulate filter, the data of an air mass meter, an exhaust gas temperature sensor and a differential pressure sensor are given to a control unit and this controller starts the regeneration based on the data on the comparison with maps.
- a control unit controls this controller to start the regeneration based on the data on the comparison with maps.
- an air mass is assigned a value of a loading state of the particle filter, from which it is possible to regenerate at the air mass.
- a value of the load state is assigned to a combination of air mass, exhaust gas temperature and differential pressure.
- the engine run can be detected via the air mass signal.
- no signal of the motor is necessary over the speed of the motor.
- the method for metering an additive for the regeneration of a particulate filter activated in the exhaust gas line of an internal combustion engine preferably uses the values of two sensors: air mass sensor and differential pressure sensor.
- the values of three sensors namely exhaust temperature sensor, air mass sensor and differential pressure sensor, and three maps of exhaust temperature, air mass and differential pressure at unloaded, partially loaded and loaded maximum filter and between which interpolation can be used.
- the soot load on the filter is continuously determined.
- the measured sensor data is permanently correlated in the software and checks whether the regeneration can start.
- only an exhaust gas temperature sensor upstream of the particulate filter is used in the measurement. This reduces system complexity, which is particularly important for retrofit solutions.
- the invention provides for continuous monitoring of the relevant parameters that are permanently related. If the overall picture of all monitored parameters allows the triggering of a regeneration, the regeneration process of the particulate filter is started. It is therefore not a static monitoring, in which first a flag is set and if this is set, other parameters are checked, but a dynamic control or control.
- One advantage is the permanent monitoring of the parameters that are essential for regeneration and the assessment of the overall situation. Not every value is evaluated individually and compared with an associated value that has to be achieved, but all parameters are constantly checked and correlated, and the interaction of all values is checked. Thus, a much higher flexibility is achieved when it comes to making the decision on the regeneration start.
- the signal of the air mass meter is evaluated.
- the sensor is adapted to the vehicle during installation on the machine (idling signal and signal at the highest possible load and speed) or specified in the control unit. This allows the software to determine a suitable engine condition for regeneration. It can e.g. the value of the load taken from the interpolated maps corresponding to the measured values of exhaust gas temperature, air mass and differential pressure are compared with a value which assigns a lower threshold value for the load to a map of the air mass. If the extracted value for the load is greater than the threshold for the load, the regeneration is started.
- the invention provides for a direct measurement of the air mass, in particular in the intake tract of the internal combustion engine.
- the method and the device for determining a start time of a regeneration process of a particulate filter switched into the exhaust gas line of an internal combustion engine are independent of the speed / air mass ratio and can easily be adapted to a vehicle. This is a significant improvement for use in retrofit applications and original equipment applications, especially with high variant variety, i. if a system with as few modifications as possible in different vehicles, e.g. Construction machinery, industrial trucks, etc. to be used.
- the invention therefore does not use the speed signal, but the air mass meter for detecting a favorable time to start the regeneration.
- values or curves for the exhaust gas back pressure as a function of the exhaust gas volume flow are provided for the respective particle filter for three states.
- the first state is that without loading (0 g / m 2 ).
- the second state is for a load (for example a value in the range of 18-28 g / m 2 , in particular 20-26 g / m 2 , preferably 24 g / m 2 ), from which regeneration can be meaningfully carried out. This is in particular the smallest charge at which soot located in the particulate filter completely burns off after ignition takes place in a region of the particulate filter.
- the ignition can be effected, for example, by post-injection of fuel and thus increase in the exhaust gas temperature or by a locally provided on the particulate filter energy source, in particular electrically.
- An electric ignition is possible, for example, by means of a central glow plug or a radially rotating heater and is preferably carried out at the upstream end of the particulate filter, for example circumferentially at the outer edge or centrally in the middle of the particulate filter.
- the third state is a load (for example, a value in the range of 28-42 g / m 2 , in particular 30-38 g / m 2 , preferably 36 g / m 2 ), from which no regeneration should be carried out to the Diesel particulate filter not to be endangered by too high temperature during regeneration.
- a load for example, a value in the range of 28-42 g / m 2 , in particular 30-38 g / m 2 , preferably 36 g / m 2
- the relationship between air mass and load is determined in a preferred embodiment.
- the air mass is measured at idle and measured the air mass at full load. This can be done once for an internal combustion engine type and be stored in the control unit or be carried out during a conversion of an internal combustion engine with a diesel particulate filter system with regeneration on the specific internal combustion engine.
- the air mass range between idle and full load is then subdivided into a number of ranges, eg, three or four ranges. These areas are preferably evenly distributed over the air mass range between idle and full load.
- the range between lower and upper threshold for the regeneration is subdivided into corresponding parts, which are assigned to the areas of the air mass area.
- the area of the smallest load is assigned to the area with the largest air mass flow and vice versa.
- the result is then one Load of the internal combustion engine via the air mass at this load assigned a load value of the diesel particulate filter, from which regeneration can take place.
- At full load or high air mass regeneration is promising even at low loads. In other words, at low loads, a high air mass flow is required for successful regeneration.
- the assignment can either be such that a minimum value is provided as the lower regeneration threshold for the air mass from which regeneration can be carried out for each subarea of the load, wherein an air mass flow in the highest range is required in the region of lowest loading.
- the upper regeneration threshold for the air mass in this case in each case the maximum, determined at full load air mass is used.
- a fixed allocation of areas of the load to areas of the air mass can be provided, so that at high load only a regeneration takes place when the load, ie the air mass moves in the lowest range, and vice versa.
- the minimum air mass, ie at idle represents the lower regeneration threshold of the air mass for the highest load area
- the upper limit of the first range of air mass above idle represents the upper regeneration threshold of the air mass for a highest load area.
- the method for determining the regeneration start can be carried out in particular by the data of the exhaust gas temperature sensor, the air mass sensor and the differential pressure sensor are evaluated by the control unit. If the load value from the maps is in the range between the lower regeneration threshold and the upper regeneration threshold, it is preferably checked whether the currently measured air mass flow is in the region which, as described, has been assigned to the loading region in which the currently established load value is located located. If this is the case, the regeneration is started. It is understood that for the individual values of the sensors, mean values are always also given via e.g. 5 seconds can be used.
- the invention also includes a device for determining the additive metering and / or a starting time of a regeneration process and for regenerating a particulate filter, which is switched into the exhaust gas line of an internal combustion engine, in particular a diesel engine, comprising an air mass meter, which is located in the intake air ström upstream of the particulate filter, in particular between intake air filter and engine is arranged, an exhaust gas temperature sensor upstream of the particulate filter of a differential pressure sensor unit, which determines the pressure difference before and after the particulate filter and a control unit, the data connections for the data air mass, exhaust gas temperature, differential pressure and Maintenance includes.
- the device further comprises a separate from the control unit power electronics for controlling the heat source for the particulate filter, which can be controlled by the control unit. Due to the separation of the power electronics and the control unit, the influence of the control unit on high energy for the heat source, eg due to the high temperature generated thereby, can be reduced.
- the exhaust gas temperature sensor is preferably provided in front of the particle filter. This reduces system complexity, which is particularly important for retrofit solutions.
- the device preferably serves to carry out a method according to the invention and is particularly suitable for this purpose.
- the power electronics include a current flow monitoring unit, and the monitoring unit may report the flow of current back to the controller. This can ensure that the regeneration process is really started. This is e.g. in an error analysis of importance.
- An advantage of the invention is the independence from the application and thus the applicability for retrofit applications and original equipment applications, especially with a high variety of variants.
- the system can be installed independently of engine knowledge and receives the only essential information (air mass signal at idle and at high load) during installation.
- the controller learns two or more air mass signals specific to the application.
- One value is, for example, the idle signal and a second value is at the highest possible speed and load, without specifying an exact value.
- the gradient in the air mass signal determined here later allows a rough estimate of the current load condition. Knowledge of the load condition is crucial in deciding whether or not there is a favorable time for regeneration.
- the prior art provides for a speed measurement that is not learned depending on the vehicle. The speed is particularly in turbocharged engines very inadequate information about the load condition of an engine.
- the differential pressure sensor unit can also be constructed from two pressure sensors, from which a differential pressure is determined in the control unit.
- an additive metering system can furthermore be provided in one embodiment of the method and devices and systems according to the invention.
- This preferably comprises an additive tank and a metering pump for the additive, which can meter the additive into the fuel return line, for example, so that the additive passes into the fuel tank and can be supplied together with the fuel via the fuel supply line to the diesel engine.
- a module with level sensor and / or level indicator can be provided for the level of the fuel tank.
- an additive is used which facilitates the regeneration of the diesel particulate filter.
- This may be, for example, a catalytic solution, for example based on metal, in particular containing iron, iron compounds such as Fe 2 O 3, platinum or other metallic catalysts.
- Fig. 1 shows a diesel particulate filter system with the components of a regeneration system
- FIG. 2 shows an example of a loading map of a diesel particulate filter.
- a typical diesel particulate filter system 100 is shown. Positions 2 and 4 show pressure measuring points before and after the diesel particulate filter.
- the differential pressure sensor 18 is connected to the pressure measuring points 2, 4 via differential pressure measuring lines 19. At the pressure measuring points, the pressure drop across the diesel particulate filter 21 can be determined.
- the illustrated diesel particulate filter 21 is a sintered metal filter, other filter element technologies are also possible, eg, ceramic filter elements of silicon carbide, aluminum titanate, or cordierite-based ceramics.
- a heat source 3 such as a heater attached. This may be a resistance heater.
- the current of the heater 3 is controlled or regulated by a power electronics 6, in particular a power relay.
- the Power electronics 6 is executed separately from the electronic control unit 7 and connected thereto via one of the control lines 17.
- the control unit 7 outputs the current setpoint to the power electronics 6.
- the power electronics can comprise a monitoring unit which reports back the value of the current to the control unit.
- the device for regeneration comprises a temperature sensor 1. This may be, for example, a thermocouple.
- the temperature sensor 1 is connected via one of the control lines 17 to the control unit 7.
- An air mass sensor 1 1 is also connected via a control line 17 to the control unit 7.
- the power supply of the heater 3 via a power supply 20, the heater 3 is further connected to the vehicle mass 5.
- an additive tank 8 and a metering pump 9 for the additive which can meter the additive into the fuel return line 16, so that the additive passes into the fuel tank 10 and can be fed together with the fuel via the fuel supply line 15 to the diesel engine 13 ,
- a module 12 may be provided with level sensor and / or level indicator.
- an additive is used which facilitates the regeneration of the diesel particulate filter.
- This may be, for example, a catalytic solution, for example based on metal, in particular containing iron, iron compounds such as Fe 2 O 3, platinum or other metallic catalysts.
- FIG. 2 shows an example of a load characteristic map for the diesel particulate filter.
- the exhaust gas volume flow in m 3 / h is plotted on the x-axis, and the exhaust gas back pressure in mbar on the y-axis.
- the first curve 110 shows the state for no load (0 g / m 2 )
- the second curve 120 for a load here, for example, 24 g / m 2
- the third curve 130 for a load here, for example, 36 g / m 2 ), from which no regeneration should be carried out in order not to endanger the diesel particulate filter by too high a temperature during regeneration.
- maps for the relationship between exhaust gas temperature, air mass and differential pressure for the three load states a) no load, b) lower threshold for regeneration and c) upper threshold for regeneration are filed for a diesel particulate filter.
- no information about the internal combustion engine is necessary.
- the relationship between air mass and load is determined.
- the air mass is measured at idle and measured the air mass at full load. This can be done once for an internal combustion engine type and stored in the control unit or carried out in a conversion of an internal combustion engine with a diesel particulate filter system with regeneration on the specific internal combustion engine.
- the air mass range between idle and full load is then divided into, for example, three or four ranges.
- the range between lower and upper threshold for the regeneration is subdivided into corresponding parts, which are assigned to the areas of the air mass area.
- a load of the internal combustion engine via the air mass at this load is assigned a load value of the diesel particulate filter, from which regeneration can take place.
- full load or high air mass regeneration is promising even at low loads. When idling, a high load is necessary.
- the procedure for determining the regeneration start can be performed by evaluating the data from the exhaust gas temperature sensor, the air mass sensor and the differential pressure sensor from the control unit; and when the load value of the maps is in the range between the lower regeneration threshold and the upper regeneration threshold of the current air mass value, the regeneration is started. It is understood that for the individual values of the sensors, mean values are always also given via e.g. 5 seconds can be used.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112012001416.2T DE112012001416A5 (de) | 2011-03-24 | 2012-03-23 | Verfahren und Vorrichtung zur Dosierung des Additivs zur Regenerierung eines Dieselpartikelfilters |
US14/035,091 US9394815B2 (en) | 2011-03-24 | 2013-09-24 | Method and device for metering the additive for regenerating a diesel particulate filter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011015061.7 | 2011-03-24 | ||
DE102011015061A DE102011015061A1 (de) | 2011-03-24 | 2011-03-24 | Verfahren und Vorrichtung zur Dosierung des Additivs zur Regenerierung eines Dieselpartikelfilters |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/035,091 Continuation US9394815B2 (en) | 2011-03-24 | 2013-09-24 | Method and device for metering the additive for regenerating a diesel particulate filter |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012127044A1 true WO2012127044A1 (de) | 2012-09-27 |
Family
ID=45952487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/055243 WO2012127044A1 (de) | 2011-03-24 | 2012-03-23 | Verfahren und vorrichtung zur dosierung des additivs zur regenerierung eines dieselpartikelfilters |
Country Status (3)
Country | Link |
---|---|
US (1) | US9394815B2 (de) |
DE (2) | DE102011015061A1 (de) |
WO (1) | WO2012127044A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105308293A (zh) * | 2013-07-08 | 2016-02-03 | 丰田自动车株式会社 | 内燃机的控制方法 |
DE102014205685B4 (de) * | 2014-03-26 | 2019-02-07 | Mtu Friedrichshafen Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine, Steuergerät und Brennkraftmaschine |
CN104912631B (zh) * | 2015-06-06 | 2018-02-02 | 杭州携蓝环保科技有限公司 | 一种柴油机微粒过滤器的主动再生系统 |
FR3073252B1 (fr) * | 2017-11-08 | 2019-10-04 | Psa Automobiles Sa | Procede de gestion de la regeneration d’un filtre a particules d’un vehicule automobile |
DE102018204903B4 (de) * | 2018-03-29 | 2020-10-08 | Vitesco Technologies GmbH | Vorrichtung zur Nachbehandlung von Abgasen |
US11624303B1 (en) * | 2022-02-22 | 2023-04-11 | GM Global Technology Operations LLC | Deceleration fuel cut-off enabled regeneration for gas particulate filter |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0488831A1 (de) | 1990-11-30 | 1992-06-03 | Automobiles Peugeot | Verfahren und Vorrichtung zum Zuführen eines dosierten Zusatzmittels in den Einspritzkreislauf für eine selbstzündende Brennkraftmaschine |
EP1170473A1 (de) * | 2000-07-07 | 2002-01-09 | DaimlerChrysler AG | Brennkraftmaschine, insbesondere für Kraftfahrzeug |
WO2003100244A1 (de) * | 2002-05-23 | 2003-12-04 | Volkswagen | Verfahren zum betreiben eines dieselmotors |
EP1736653A1 (de) | 2005-06-21 | 2006-12-27 | Peugeot Citroën Automobiles S.A. | Vorrichtung zur Zuführung von additifbildenden Mitteln in einen Kraftstofftank eines Kraftfahrzeugmotors |
DE102006033567A1 (de) | 2006-07-20 | 2008-01-24 | Hjs Fahrzeugtechnik Gmbh & Co. Kg | Verfahren zum Bestimmen des Auslösezeitpunktes zum Auslösen des Regenerationsprozesses zum Regenerieren eines Partikelfilters |
EP1583892B1 (de) | 2003-01-13 | 2010-05-05 | HJS Fahrzeugtechnik GmbH & Co. KG | Verfahren zum regeln einer heizeinrichtung eines partikelfilters |
EP2252780A1 (de) | 2008-03-15 | 2010-11-24 | HJS Fahrzeugtechnik GmbH & Co. KG | Verfahren zum bestimmen des beladungszustandes eines in den abgasstrang einer brennkraftmaschine eingeschalteten partikelfilters sowie einrichtung zum reduzieren der partikelemission einer brennkraftmaschine |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61135917A (ja) * | 1984-12-04 | 1986-06-23 | Matsushita Electric Ind Co Ltd | デイ−ゼル・エンジンの排気ガス微粒子浄化装置 |
JP3869333B2 (ja) * | 2002-08-12 | 2007-01-17 | ボッシュ株式会社 | 排気ガス浄化装置 |
JP4304447B2 (ja) * | 2003-08-29 | 2009-07-29 | いすゞ自動車株式会社 | 排気ガス浄化方法及び排気ガス浄化システム |
US7406822B2 (en) * | 2005-06-30 | 2008-08-05 | Caterpillar Inc. | Particulate trap regeneration system and control strategy |
US7607295B2 (en) * | 2005-07-07 | 2009-10-27 | Nissan Motor Co., Ltd. | Particulate accumulation amount estimating system |
JP3933172B2 (ja) * | 2005-07-15 | 2007-06-20 | いすゞ自動車株式会社 | 排気ガス浄化システムの制御方法及び排気ガス浄化システム |
US8011177B2 (en) * | 2005-09-01 | 2011-09-06 | GM Global Technology Operations LLC | Exhaust particulate filter |
US7587892B2 (en) * | 2005-12-13 | 2009-09-15 | Cummins Ip, Inc | Apparatus, system, and method for adapting a filter regeneration profile |
US20070204594A1 (en) * | 2006-03-02 | 2007-09-06 | Nissan Motor Co., Ltd. | Exhaust purification system for hybrid vehicle |
US7856808B2 (en) * | 2007-06-25 | 2010-12-28 | Detroit Diesel Corporation | Method to re-open ash filled channels in diesel particulate filters |
US8265819B2 (en) * | 2008-02-05 | 2012-09-11 | Volvo Group North America, Llc | Method and system for operator interface with a diesel particulate filter regeneration system |
JP2009228589A (ja) * | 2008-03-24 | 2009-10-08 | Denso Corp | 排気浄化システムおよびその排気浄化制御装置 |
US8302385B2 (en) * | 2008-05-30 | 2012-11-06 | Cummins Ip, Inc. | Apparatus, system, and method for controlling engine exhaust temperature |
JP4631942B2 (ja) * | 2008-07-23 | 2011-02-16 | マツダ株式会社 | パティキュレートフィルタ再生装置 |
US20100192546A1 (en) * | 2009-02-03 | 2010-08-05 | John Philip Nohl | Method and Apparatus for Controlling Regeneration of a Particulate Filter |
US8950177B2 (en) * | 2009-06-17 | 2015-02-10 | GM Global Technology Operations LLC | Detecting particulate matter load density within a particulate filter |
US20110146234A1 (en) * | 2009-12-23 | 2011-06-23 | Caterpillar Inc. | Power system having additive injector |
-
2011
- 2011-03-24 DE DE102011015061A patent/DE102011015061A1/de not_active Withdrawn
-
2012
- 2012-03-23 WO PCT/EP2012/055243 patent/WO2012127044A1/de active Application Filing
- 2012-03-23 DE DE112012001416.2T patent/DE112012001416A5/de not_active Withdrawn
-
2013
- 2013-09-24 US US14/035,091 patent/US9394815B2/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0488831A1 (de) | 1990-11-30 | 1992-06-03 | Automobiles Peugeot | Verfahren und Vorrichtung zum Zuführen eines dosierten Zusatzmittels in den Einspritzkreislauf für eine selbstzündende Brennkraftmaschine |
EP1170473A1 (de) * | 2000-07-07 | 2002-01-09 | DaimlerChrysler AG | Brennkraftmaschine, insbesondere für Kraftfahrzeug |
WO2003100244A1 (de) * | 2002-05-23 | 2003-12-04 | Volkswagen | Verfahren zum betreiben eines dieselmotors |
EP1509691B1 (de) | 2002-05-23 | 2009-07-29 | Volkswagen Aktiengesellschaft | Verfahren zum betreiben eines dieselmotors |
EP1583892B1 (de) | 2003-01-13 | 2010-05-05 | HJS Fahrzeugtechnik GmbH & Co. KG | Verfahren zum regeln einer heizeinrichtung eines partikelfilters |
EP1736653A1 (de) | 2005-06-21 | 2006-12-27 | Peugeot Citroën Automobiles S.A. | Vorrichtung zur Zuführung von additifbildenden Mitteln in einen Kraftstofftank eines Kraftfahrzeugmotors |
DE102006033567A1 (de) | 2006-07-20 | 2008-01-24 | Hjs Fahrzeugtechnik Gmbh & Co. Kg | Verfahren zum Bestimmen des Auslösezeitpunktes zum Auslösen des Regenerationsprozesses zum Regenerieren eines Partikelfilters |
EP2252780A1 (de) | 2008-03-15 | 2010-11-24 | HJS Fahrzeugtechnik GmbH & Co. KG | Verfahren zum bestimmen des beladungszustandes eines in den abgasstrang einer brennkraftmaschine eingeschalteten partikelfilters sowie einrichtung zum reduzieren der partikelemission einer brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
DE112012001416A5 (de) | 2014-02-20 |
US9394815B2 (en) | 2016-07-19 |
DE102011015061A1 (de) | 2012-09-27 |
US20140208944A1 (en) | 2014-07-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102004013603B4 (de) | Abgasreinigungssystem und Regenerationsende-Ermittlungsverfahren | |
DE102008000138B4 (de) | Brennkraftmaschinen-Diagnosevorrichtung | |
DE102005011419B4 (de) | Abgasreinigungssystem für eine Brennkraftmaschine | |
DE602004008862T2 (de) | Verfahren zur Aktivierung der Regeneration eines Partikelfilters auf Basis von der Schätzung des in dem Partikelfilter angesammelten Partikelmenge | |
DE102016223247B4 (de) | Fehlerdiagnosevorrichtung für abgasreinigungssystem | |
DE102004017521B4 (de) | Drucksensordiagnose über einen Computer | |
DE602004001154T2 (de) | Abgasreinigungsvorrichtung für Brennkraftmaschinen | |
DE102007016531B4 (de) | Abgasreinigungsvorrichtung für einen Dieselmotor | |
DE102011007096B4 (de) | Dieselpartikelfiltersteuerung | |
DE102007000094B4 (de) | Abgasreinigungsgerät mit einem Partikelkollektor zur Verwendung in einem Fahrzeug | |
DE102016111031A1 (de) | Dualraten-Dieselpartikelfilter-Lecküberwachung | |
WO2012127044A1 (de) | Verfahren und vorrichtung zur dosierung des additivs zur regenerierung eines dieselpartikelfilters | |
DE102019100037A1 (de) | NOX-VERSATZDIAGNOSE WÄHREND EINER MOTORHEIßABSTELLUNG | |
DE102005062120A1 (de) | Verfahren und Vorrichtung zur Überwachung eines Abgasnachbehandlungssystems | |
DE102013104697B4 (de) | Diagnoseverfahren für einen Rußsensor | |
DE102004014453A1 (de) | Abgasreinigungssystem und Abgasreinigungsverfahren | |
DE102006000164A1 (de) | Abgasreinigungsvorrichtung eines Verbrennungsmotors | |
EP1087114B1 (de) | Verfahren zur Steuerung einer Regeneration eines Partikelfilters | |
DE102006046144A1 (de) | Dieselfeststofffilter mit virtuellen Sensoren für Russdurchlässigkeit | |
DE102013104693A1 (de) | Abgasreinigungssystem für eine interne Verbrennungsmaschine | |
DE102012207392A1 (de) | Abgasreinigung mit einem Partikelsensor | |
WO2009074380A1 (de) | Verfahren und vorrichtung zur diagnose eines partikelfilters | |
DE102014111026A1 (de) | Diagnosesystem eines Temperaturregelkreises für eine Integration einer ereignisbasierten Abweichung | |
WO2012123490A1 (de) | Verfahren und vorrichtung zur bestimmung eines startzeitpunkts eines regenerationsprozesses zur regenerierung eines dieselpartikelfilters | |
DE102014205685A1 (de) | Verfahren zum Betreiben einer Brennkraftmaschine, Steuergerät und Brennkraftmaschine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12713649 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1120120014162 Country of ref document: DE Ref document number: 112012001416 Country of ref document: DE |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: R225 Ref document number: 112012001416 Country of ref document: DE Effective date: 20140220 |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12713649 Country of ref document: EP Kind code of ref document: A1 |