WO2020048769A1 - Procédé de distribution de carburant - Google Patents
Procédé de distribution de carburant Download PDFInfo
- Publication number
- WO2020048769A1 WO2020048769A1 PCT/EP2019/072281 EP2019072281W WO2020048769A1 WO 2020048769 A1 WO2020048769 A1 WO 2020048769A1 EP 2019072281 W EP2019072281 W EP 2019072281W WO 2020048769 A1 WO2020048769 A1 WO 2020048769A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ethanol
- fuel
- value
- rate
- consumption
- Prior art date
Links
Classifications
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/082—Premixed fuels, i.e. emulsions or blends
- F02D19/085—Control based on the fuel type or composition
- F02D19/087—Control based on the fuel type or composition with determination of densities, viscosities, composition, concentration or mixture ratios of fuels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/082—Premixed fuels, i.e. emulsions or blends
- F02D19/084—Blends of gasoline and alcohols, e.g. E85
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/3005—Details not otherwise provided for
-
- 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
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0611—Fuel type, fuel composition or fuel quality
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Definitions
- the technical sector of the present invention is that of devices and methods for controlling the supply of fuel for an internal combustion engine.
- This type of engine is necessarily equipped with a sensor for measuring the level of ethanol contained in the fuel.
- a sensor for measuring the level of ethanol contained in the fuel.
- a sensor due to its intrinsic characteristics, such a sensor can only be positioned in a place where the fuel pressure is low, that is to say between the fuel tank and the fuel injector.
- This delay must be taken into account in order not to disturb the operation of the engine during a transition in the ethanol level occurring during a fuel change.
- the strategy saves the measurement of the ethanol rate for 10 minutes and the ethanol rate taken into account in the motor control parameters is frozen at the last measured value
- the strategy restores the saving of the previous measurement in the ethanol rate taken into account in the engine control parameters, • once this restitution is finished, therefore after 10 min, the ethanol rate taken into account in the engine control parameters is the measured value.
- the ethanol level transition period is crucial and the transition displayed at the ethanol level sensor should be clearly transcribed at the level of the injectors.
- the strategy described above does not take into account the fact that the transition from ethanol level at the injectors is slower than at the sensor nor the effect of consumption on the transition speed. There is therefore an error in the ethanol level transcribed to the injectors because the transition in ethanol level seen by the sensor is restored to the injectors with the same speed as that seen at the sensor. The error is all the greater if the fuel consumption varies between the phase of learning the ethanol level by the sensor and the phase of return to the injectors.
- transition detection of the ethanol level is based on a variation in the fuel level of the tank.
- the strategy will not be activated. This can lead to flooding of the engine with inability to restart.
- the strategy will still be activated and therefore the associated inhibitions when this is not necessary.
- US patent 2010/0059020 describes a device and a method for controlling the fuel supply of an internal combustion engine.
- the method makes it possible to retranscribe to the injectors the measurement of the ethanol level carried out by an ethanol rate sensor located between the tank and the injectors.
- the method consists in dividing the volume between the sensor and the injector into a number N of imaginary cells. We therefore have N cells, the first of which corresponds to the sensor and the last to the injector. Whenever the fuel consumption exceeds the volume of a cell, the method transcribes the ethanol level measured and this up to the cell corresponding to the injector. The passage of the ethanol rate from one cell to another is therefore done each time the fuel consumption reaches the value of the volume of a cell
- One of the drawbacks of this method lies in the fact that the data transcribed to the injectors is not immediate. Indeed, there is a lag time between the measurement of the first ethanol level and the transcription of the ethanol level "corrected" to the injectors. This latency time is a function of the number of imaginary cells between the sensor and the injectors, as well as the speed of fuel consumption. In addition, the speed of data acquisition is directly dependent on the number of imaginary cells, which implies that depending on the speed of consumption, the data are not acquired at regular intervals. In this method, data is acquired based on fuel consumption speed and not at regular time intervals.
- the object of the present invention is to remedy the aforementioned drawbacks and to propose a method making it possible to improve the representativeness of the transition from the ethanol level to the injectors level from the measurement at the level of the ethanol level sensor.
- the invention therefore relates to a method for determining the actual level of ethanol in a fuel to be applied to an injector of an internal combustion engine comprising:
- a second step of determining the current cumulative consumption of fuel said current cumulative consumption being equal to the sum of the instantaneous consumption obtained in the first step and of the last value of cumulative consumption,
- the method comprises a sixth step carried out after the fourth step consisting in applying a first-order filter to the real level of ethanol obtained in the fourth step so as to obtain a real level of corrected ethanol .
- each of the matrices comprises N cells.
- the difference between the maximum value of ethanol content in the ethanol content matrix and the minimum value of ethanol content in the ethanol content matrix is compared to a predetermined threshold value so as to detect a start and / or end of a fuel transition period.
- the data of the first step are collected at regular time intervals.
- the common abscissa is an index corresponding to a time interval of data acquisition.
- the invention also relates to an engine control unit characterized in that it is configured for the implementation of the method according to any one of the preceding claims.
- An advantage of the present invention lies in improving the taking into account of the delay between the measurement of the ethanol level and its taking into account in the engine control unit.
- Another advantage of the present invention lies in improving the stability of the engine during a fuel transition.
- Yet another advantage of the present invention resides in the cancellation of the risks of false detection of errors on the fuel system and of the risks of engine instability.
- Yet another advantage of the present invention lies in the robustness of the detection of a fuel change.
- Yet another advantage of the present invention lies in the reduction of emissions of particles harmful to the environment.
- Yet another advantage of the present invention lies in the reduction of emissions of particles harmful to humans.
- Another advantage of the present invention lies in the optimization of fuel consumption.
- FIG. 1 is a schematic view of an engine according to the invention
- FIG. 2 represents in the form of a flow diagram the method according to an embodiment of the invention.
- Figure 3 is an example of cumulative consumption and ethanol rate matrices.
- the present invention is capable of being used in engines capable of operating with a fuel composed of petrol, alcohol such as ethanol or a mixture gasoline and alcohol.
- a fuel composed of petrol, alcohol such as ethanol or a mixture gasoline and alcohol.
- Such engines in particular consist of a reservoir connected to the injectors by a conduit.
- the method according to the invention will be described in relation to an engine comprising an injector.
- the fuel is brought from the tank to the injector by means of a pump via the conduit and the injector makes it possible to inject into the combustion chamber the desired quantity of fuel so as to obtain a complete combustion of the fuel. according to an air / fuel stoichiometric ratio.
- the amount of fuel required for complete combustion depends on the ethanol content of the fuel used.
- An ethanol level sensor is therefore inserted at the level of the duct so as to determine the ethanol level of the fuel passing through the duct.
- the measurement of the ethanol level is all the more essential during a transition period of the ethanol rate, that is to say when the tank is filled with fuel having an ethanol rate different from that already present in the tank.
- the engine also includes an engine control unit.
- This unit receives and stores instant fuel consumption and fuel ethanol rate data, notably from the ethanol level sensor.
- the engine control unit is used to process the data collected and to determine the ethanol level to be applied to the injector according to the ethanol level measured by the sensor.
- the engine control unit also controls the injector to inject the necessary amount of fuel into the combustion chamber based on the ethanol level of the fuel to be applied to the injector.
- FIG. 1 represents an engine capable of being used to implement the method according to the invention. As described above, it comprises a fuel tank 1 connected to an injector 4 by a line 5, an ethanol level sensor 3 located at the level of the line 5 and an engine control unit 2. The volume of the conduit 5 located between the sensor 3 and the injector 4.
- the ethanol level sensor 3 measures the ethanol level of the fuel passing through line 5 at regular time intervals.
- the ethanol level sensor thus makes it possible to collect ethanol level data. This type of sensor is known to those skilled in the art.
- the instantaneous fuel consumption is determined at regular time intervals according to techniques well known to those skilled in the art.
- the instantaneous consumption can in particular be determined from the setpoint for the quantity of fuel to be injected into the combustion chamber.
- the ethanol rate and instant consumption data are collected at the same interval. This implies that for an ethanol rate data corresponds an instantaneous consumption data.
- the injector 4 makes it possible to inject the desired quantity of fuel into a combustion chamber (not shown in FIG. 1). It is in the combustion chamber that the combustion of fuel takes place in the presence of air according to a stoichiometric air / fuel ratio. As indicated above, the objective is to achieve complete combustion of the fuel so as to minimize the discharge of harmful particles but also to protect the various components of the engine. This stoichiometric air / fuel ratio is directly dependent on the ethanol content of the fuel used. It is 14.5 for pure petrol and 9 for pure ethanol.
- the engine control unit 2 makes it possible to store, process and retranscribe to the injector 4 the instantaneous consumption data and the ethanol rate.
- Said engine control unit 2 comprises in particular a data storage means, a data processing means and a means of controlling the injector.
- the engine control unit 2 allows the steps of the process according to the invention to be carried out. In particular, it collects ethanol rate and instant fuel consumption data.
- the engine control unit 2 determines the current cumulative fuel consumption. This current cumulative consumption is equal to the sum of the current instantaneous consumption and the last cumulative consumption value. If the control unit has only one instantaneous consumption value, the current cumulative consumption is equal to the instantaneous consumption. From the moment when the engine control unit 2 has several cumulative consumption values, a distinction is made between the current cumulative consumption and the other cumulative consumption values. The current cumulative consumption then corresponds to the last cumulative consumption value determined by the engine control unit 2.
- the engine control unit 2 also allows the storage of the cumulative consumption and ethanol rate data in two matrices having a common abscissa so that each value of cumulative consumption corresponds to an ethanol rate value.
- the common abscissa is the index corresponding to the time interval of data acquisition.
- the data is collected according to a regular time interval.
- each of the matrices comprises N cells.
- the engine control unit 2 determines the actual ethanol level to be applied to the injector.
- This actual ethanol rate to be applied to the injector corresponds to the value of the ethanol rate of the ethanol rate matrix having the same abscissa as the smallest cumulative consumption value of the cumulative consumption matrix for which the difference between the current cumulative consumption value and said cumulative consumption value is less than the value of the volume V of the conduit located between the sensor and the injector.
- the engine control unit 2 then retranscribes the real rate of fuel ethanol at the injector, which makes it possible to calculate the right air / fuel ratio and therefore to inject the amount of fuel necessary for perfect combustion.
- a first-order filter is applied to the real ethanol rate obtained previously.
- This type of first-order filter is known to those skilled in the art and the filtering constant applied depends on the operating point of the engine. Said engine operating point can be characterized by a number of constants such as air flow, engine speed and instantaneous fuel consumption.
- FIG. 2 represents in the form of a flow diagram the method according to an embodiment of the invention.
- the first step 6 consists in collecting instant consumption data (fuel_cspt actuai ) and ethanol rate (ethanol_rate actuai ).
- the ethanol level is measured using an ethanol sensor inserted in the pipe 5 located between the fuel tank 1 and the injector 4.
- the second step 7a consists in determining the current cumulative consumption of fuel (fuel_cspt_cum actuai ). Said current cumulative consumption (fuel_cspt_cum actuai ) is equal to the sum of the instantaneous consumption obtained previously (fuel_cspt actuai ) and the last value of cumulative consumption (fuel_cspt_cum prev ).
- the two matrices have a common abscissa ([idx_wr]) so that each value of cumulative consumption corresponds to a value of ethanol content.
- the common abscissa is the index corresponding to the time interval of data acquisition.
- the data is collected according to a regular time interval.
- each of the matrices comprises N cells.
- the fourth step 8 consists in determining the value of the real ethanol rate of the fuel to be applied to the injector (ethanol_rateinjectors).
- Said real rate (ethanol_rateinjectors) is the value of the ethanol rate of the ethanol rate matrix (Mat_ethanol_rate [idx_rd]) having the same abscissa as the smallest cumulative consumption value of the cumulative consumption matrix (Mat_fuel_cspt_cum [idx_rd ]) for which the difference between the value of the current cumulative consumption (Fuel_cspt_cum actuai ) and said cumulative consumption value (Mat_fuel_cspt_cum [idx_rd]) is less than the value of a volume V (VOL_SENS_INJ) of the duct located between the sensor and the injector.
- VOL_SENS_INJ volume V
- the actual ethanol level to be applied to the injector is determined.
- a first-order filter is applied to the real rate of ethanol obtained previously.
- This type of first-order filter is known to a person skilled in the art and the filtering constant applied depends on the operating point of the engine. Said engine operating point can be characterized by a number of constants such as air flow, engine speed and instantaneous fuel consumption.
- the difference between the maximum value of the ethanol content of the ethanol content matrix and the minimum value of the ethanol content of the matrix is compared ethanol level at a predetermined threshold value so as to detect a start and / or an end of a fuel transition period. If the difference is greater than the predetermined threshold, a fuel transition period is detected. If the difference is less than the predetermined threshold, an end of fuel transition period is detected.
- This embodiment makes it possible to detect a fuel change in a safe and precise manner. The change is detected on the basis of the ethanol level of the fuel and no longer on the basis of the level of fuel in the tank as it was before. This greatly reduces the risk of false fuel change detections.
- Figure 3 shows an example of cumulative consumption and ethanol rate matrices. This example provides a more concrete view of the process for determining the actual ethanol level to be applied to the injector.
- the volume V between the sensor and the injector is 0.7 L.
- the two matrices each include N cells and have a common abscissa.
- the value of the current cumulative consumption is the last value determined by the process (fuel_cspt_cum actuai ), it is 1, 7.
- the value of the ethanol rate of the ethanol rate matrix having the same abscissa as the smallest cumulative consumption value of the cumulative consumption matrix for which the difference between the value of the current cumulative consumption and said value cumulative consumption is less than the value of a volume V of the conduit located between the sensor and the injector is the value b.
- the value of the current cumulative consumption is the last value determined by the process (fuel_cspt_cum actuai ), it is 1, 9.
- the value of the ethanol rate of the ethanol rate matrix having the same abscissa as the smallest cumulative consumption value of the cumulative consumption matrix for which the difference between the value of the current cumulative consumption and said value cumulative consumption is less than the value of a volume V of the conduit located between the sensor and the injector is the value c.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/273,840 US11220974B2 (en) | 2018-09-07 | 2019-08-20 | Fuel distribution method |
BR112021004276-8A BR112021004276B1 (pt) | 2018-09-07 | 2019-08-20 | Método de distribuição de combustível |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1858049A FR3085722B1 (fr) | 2018-09-07 | 2018-09-07 | Procede de distribution de carburant |
FR1858049 | 2018-09-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020048769A1 true WO2020048769A1 (fr) | 2020-03-12 |
Family
ID=63722668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2019/072281 WO2020048769A1 (fr) | 2018-09-07 | 2019-08-20 | Procédé de distribution de carburant |
Country Status (4)
Country | Link |
---|---|
US (1) | US11220974B2 (fr) |
BR (1) | BR112021004276B1 (fr) |
FR (1) | FR3085722B1 (fr) |
WO (1) | WO2020048769A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3119422B1 (fr) * | 2021-02-01 | 2022-12-16 | Vitesco Technologies | Procédé de distribution de carburant |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5325836A (en) * | 1992-11-05 | 1994-07-05 | Ford Motor Company | Flexible fuel control system with fuel transit delay compensation |
US5941217A (en) * | 1997-10-29 | 1999-08-24 | Chrysler Corporation | Method of compensating for changing fuels in a flexible fueled vehicle using a fuel composition sensor |
US20100059020A1 (en) | 2008-09-05 | 2010-03-11 | Denso Corporation | Fuel supply system and fuel supply control method for internal combustion engine |
US20120227707A1 (en) * | 2011-03-11 | 2012-09-13 | Toyota Jidosha Kabushiki Kaisha | Fuel supply system of internal combustion engine |
US8656896B2 (en) * | 2010-04-27 | 2014-02-25 | Toyota Jidosha Kabushiki Kaisha | Control apparatus for internal combustion engine and control method for internal combustion engine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080244960A1 (en) * | 2007-04-09 | 2008-10-09 | Randall Fischer | Fuel blends |
JP4274279B2 (ja) * | 2007-11-02 | 2009-06-03 | トヨタ自動車株式会社 | 内燃機関 |
EP2085460A1 (fr) * | 2008-02-01 | 2009-08-05 | She Blends Holdings B.V. | Carburants pour moteur améliorés du point de vue de l'environnement |
US8843295B2 (en) * | 2009-05-27 | 2014-09-23 | GM Global Technology Operations LLC | Ethanol content determination systems and methods |
US20130269240A1 (en) * | 2010-08-20 | 2013-10-17 | Márcio Turra De Ávila | Ternary fuel compositions containing biodiesel, plant oil and lower alcohols for feeding diesel-cycle motors |
CN103320179A (zh) * | 2012-03-22 | 2013-09-25 | 王祉童 | 一种含醇类汽油添加剂 |
US10612476B2 (en) * | 2018-04-09 | 2020-04-07 | Saudi Arabian Oil Company | Internal combustion engines which utilize multiple fuels and methods for the operation of such |
US10989133B2 (en) * | 2019-09-13 | 2021-04-27 | StepOneTech Ltd | Device for modifying the amount of fuel combusted for an electronically fuel injected combustion engine |
-
2018
- 2018-09-07 FR FR1858049A patent/FR3085722B1/fr active Active
-
2019
- 2019-08-20 US US17/273,840 patent/US11220974B2/en active Active
- 2019-08-20 BR BR112021004276-8A patent/BR112021004276B1/pt active IP Right Grant
- 2019-08-20 WO PCT/EP2019/072281 patent/WO2020048769A1/fr active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5325836A (en) * | 1992-11-05 | 1994-07-05 | Ford Motor Company | Flexible fuel control system with fuel transit delay compensation |
US5941217A (en) * | 1997-10-29 | 1999-08-24 | Chrysler Corporation | Method of compensating for changing fuels in a flexible fueled vehicle using a fuel composition sensor |
US20100059020A1 (en) | 2008-09-05 | 2010-03-11 | Denso Corporation | Fuel supply system and fuel supply control method for internal combustion engine |
US8656896B2 (en) * | 2010-04-27 | 2014-02-25 | Toyota Jidosha Kabushiki Kaisha | Control apparatus for internal combustion engine and control method for internal combustion engine |
US20120227707A1 (en) * | 2011-03-11 | 2012-09-13 | Toyota Jidosha Kabushiki Kaisha | Fuel supply system of internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
US20210332771A1 (en) | 2021-10-28 |
FR3085722A1 (fr) | 2020-03-13 |
BR112021004276B1 (pt) | 2024-01-30 |
BR112021004276A2 (pt) | 2021-05-25 |
US11220974B2 (en) | 2022-01-11 |
FR3085722B1 (fr) | 2020-08-07 |
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