EP3433148A1 - Method for controlling an electric assistance torque - Google Patents
Method for controlling an electric assistance torqueInfo
- Publication number
- EP3433148A1 EP3433148A1 EP17708853.1A EP17708853A EP3433148A1 EP 3433148 A1 EP3433148 A1 EP 3433148A1 EP 17708853 A EP17708853 A EP 17708853A EP 3433148 A1 EP3433148 A1 EP 3433148A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- torque
- offset
- static
- control method
- assistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/15—Control strategies specially adapted for achieving a particular effect
- B60W20/19—Control strategies specially adapted for achieving a particular effect for achieving enhanced acceleration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/082—Selecting or switching between different modes of propelling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/085—Changing the parameters of the control units, e.g. changing limit values, working points by control input
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/48—Parallel type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0638—Engine speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/10—Change speed gearings
- B60W2510/1005—Transmission ratio engaged
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
-
- 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
-
- 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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
-
- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/84—Data processing systems or methods, management, administration
Definitions
- the present invention relates to the management of energy in a hybrid vehicle, in particular the energy distribution of an electric assist torque at acceleration on a parallel hybrid powertrain vehicle (GMP).
- GMP parallel hybrid powertrain vehicle
- the electric machine of a hybrid powertrain comprising at least one thermal engine and an electric traction machine that can operate as a generator for recharging batteries by recovering energy while driving.
- a heat engine capable of providing torque to the wheel
- an electric machine capable of providing torque to the wheel.
- the torque demand of the driver is satisfied by the sum of the torques provided by these two motor sources.
- LGE law of energy management
- a parallel hybrid GMP also offers the benefit of providing extra torque to the wheel, compared to the power of the heat engine alone. This extra torque, or additional electrical torque, is provided by the electric machine.
- the publication FR 3 001 427 discloses a method for limiting the energy of the assisting torque to the acceleration of a hybrid vehicle.
- the described method aims to control the GMP overall consumption, including energy expenditure related to couple assistance, based on energy capacity. We strive not to penalize the gain in consumption provided by hybridization.
- a coefficient of limitation of the electric assist torque available for torque assistance is introduced. This coefficient is between zero and one, depending on the amount of electrical energy remaining in an energy range of the battery reserved for torque assistance.
- the application of the assistance torque limitation coefficient, or "overtorque”, is imposed on the GMP, regardless of its energy cost.
- the aim of the invention is to improve the overall energy performance of a hybrid GMP with limited electric torque assistance as a function of the energy available for this function, by placing the activation of the torque assist function in dependence on the energy recovery mode in the battery.
- the invention provides that the assistance requested by the torque request is authorized, or not, depending on the cost of fuel consumption, of the electrical energy recovered by the batteries through the electrical machine in phase. recharge.
- the assistance torque is divided between a static component that makes it possible to supplement the static maximum torque of the heat engine to increase the maximum torque of the GMP that can be reached in the static phase, and a dynamic component that makes it possible to compensate for the dynamic limitations imposed by the heat engine. transitional phase.
- This invention redefines the static and dynamic limits of the GMP, using the thermal and electrical torques to improve the overall performance of the GMP.
- Other features and advantages of the present invention will be better understood on reading the following description of a non-limiting embodiment thereof, in which:
- FIG. 1A shows the role of the "static overtorque", during the static phase of torque assistance
- Figure 1B shows the role of the "dynamic overtorque" during the transitional phase of couple assistance.
- the engine torque setpoint supplied to the GMP increases rapidly.
- the torque setpoint is most often filtered to reduce the discomfort of too much reactivity, while maintaining an acceptable response time.
- the static additional torque provided by the electric machine makes it possible to increase the maximum torque of the GMP, which can be reached in the static phase. It is called “static overtorque”, here offset 1. It completes the maximum static torque of the engine.
- dynamic overtorque makes it possible to compensate for the dynamic limitations imposed by the engine in the transient phase (smoke limitation, response time of the air chain, etc.); this dynamic component, called here offset 2, makes it possible to compensate for the dynamic limitations imposed by the thermal engine in transient phase.
- the invention provides to fully, or only partially, the maximum torque of the electric machine Cmax stat elec, that of the engine.
- This method relies on the definition of a quantity of electrical torque that can be added as a static overtorque to the torque of the heat engine.
- the carto quantity depends on the engine speed and the gear ratio. In the context of the invention, it can be determined from adjustable maps.
- the objective of limiting the static overtorque with respect to the total available electrical torque, is to make a compromise between the performance and the repeatability of the assistance. This measure is particularly justified on a light hybridization GMP, in which the amount of electrical energy available for assistance is always limited.
- carto 1 f (scheme, BV report)
- the amount of available torque carto 1 for the static component (offset 1) is a function of the engine speed and the gear ratio.
- the static overtorque is then defined as the product of the minimum value between carto 1 and the maximum electric static torque by the weighting coefficient C:
- offset 1 MIN (map 1, Cmax stat elec) x C
- the static offset component 1 is therefore equal to the product MIN (map 1, Cmax stat elec) x C, of the limiting coefficient C by the minimum between a quantity of available torque carto 1 and the maximum static torque of the electric machine.
- the additional dynamic torque, or dynamic overtorque makes it possible to compensate for the dynamic limitations imposed by the transient phase motor. It is an addition, of electrical origin, to the maximum dynamic torque of the thermal engine Cmax dyn thermal, to realize the dynamic maximum dynamic torque of the GMP Cmax dyn GMP. For the reasons stated above concerning the static overtorque, it is not always desirable to use all of the available electrical torque for the dynamic overtorque.
- a quantity of electric torque, which can be added in the form of a dynamic overtorque is therefore determined to the dynamic torque of the heat engine. It is distinguished from the dynamic torque actually added, or dynamic overtorque offset 2, highlighted in Figure 1B.
- the offset 2 is a complement to the maximum dynamic torque of the engine, to reach the maximum static torque more quickly.
- the carto quantity 2 is introduced to control the amplitude of the dynamic offset correction 2, whatever the driving conditions (altitude, high air temperature, etc.), especially when the maximum static torque of the heat engine decreases, carto 2, Depends as Carto 1, Diet and Box Report. It is also determined from maps. We adopt the following terms,
- carto 2 f (scheme, BV report)
- the dynamic overtorque offset 2 is the product of the maximum value between carto 2 and the maximum electric static torque by the limiting coefficient C:
- offset 2 MAX (chart 2 (speed, ratio BV), offset 1) x C
- the amount of torque (cart 2) available for the dynamic component (offset 2) is a function of the engine speed and the gear ratio.
- the dynamic component of the offset assist torque 2 is therefore equal to the product MAX (carto 2 (speed, ratio BV), offset 1) x C), the limiting coefficient by the maximum between a quantity of available torque (carto 2 ( speed, ratio_BV) and the static component (offset_l) of the assistance torque.
- the dynamic offset component 2 must always be greater than or equal to the static component offset_l, to ensure that the additional dynamic torque achieves in all cases the static maximum torque of the static GMP Cmax GMP, which integrates the static additional torque. . Thanks to the offset 2 ⁇ offset 1 condition, the static overtorque is always accompanied by dynamic overtorque, but the converse is not true.
- the control of the acceleration electric assist torque provided in response to an increase in the driver's torque demand relates to the electric machine of a hybrid powertrain comprising at least one heat engine and an electric traction machine capable of operating as a generator for recharging batteries by recovering energy while driving.
- the GMP uses the engine to recharge the battery, and consumes a surplus of fuel to perform this refill.
- the first type of energy is considered less expensive than the second.
- the invention proposes to link the authorization of the static and dynamic overtorque, at the cost of the recovered energy, when it is solicited by raising the torque demand of the driver.
- the assistance requested by the torque request is authorized or not, depending on the cost in consumption of fuel, electrical energy recovered by the batteries through the electric machine in the charging phase.
- the calibration of the limitation coefficient C makes it possible to link the authorization of the overtorque to the types of energy mentioned above, for example according to the driving mode of the vehicle. It is thus possible to limit the amount of energy expended in electric torque assistance, depending on the mode of driving adopted. If the driver has the choice for example between an economic mode “eco”, favoring a low consumption of the GMP, a "normal” mode and a “sport” mode focusing on performance, one can calibrate differently the weighting coefficient C, according to the adopted mode. The assistance in couple is weighted differently, according to the adoption of a mode of conduct favoring a low overall consumption of the GMP, or its performance.
- table name f (C) allows to calculate a factor included in [0 ... 1], for the normal mode
- FIGS. 2A to 2C The settings proposed in this example are illustrated by FIGS. 2A to 2C:
- This setting does not allow additional torque in eco mode. It favors energy saving, compared to improving the performance of the GMP.
- offset_2 MAX (carto_2, offset_2j x C
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1652470A FR3049249B1 (en) | 2016-03-23 | 2016-03-23 | METHOD OF CONTROLLING A TORQUE OF ELECTRICAL ASSISTANCE |
PCT/FR2017/050231 WO2017162934A1 (en) | 2016-03-23 | 2017-02-02 | Method for controlling an electric assistance torque |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3433148A1 true EP3433148A1 (en) | 2019-01-30 |
Family
ID=56008759
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17708853.1A Withdrawn EP3433148A1 (en) | 2016-03-23 | 2017-02-02 | Method for controlling an electric assistance torque |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3433148A1 (en) |
CN (1) | CN108778875B (en) |
BR (1) | BR112018068564A2 (en) |
FR (1) | FR3049249B1 (en) |
WO (1) | WO2017162934A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3079802B1 (en) * | 2018-04-09 | 2022-02-11 | Psa Automobiles Sa | CONTROL SYSTEM FOR HYBRID VEHICLE |
US10543739B1 (en) * | 2018-07-25 | 2020-01-28 | Fca Us Llc | Mode transition control techniques for an electrically all-wheel drive hybrid vehicle |
CN111775924B (en) * | 2020-07-23 | 2021-05-04 | 厦门金龙联合汽车工业有限公司 | Brake energy recovery maximization control method of series-parallel hybrid power system |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8585540B2 (en) * | 2007-11-02 | 2013-11-19 | GM Global Technology Operations LLC | Control system for engine torque management for a hybrid powertrain system |
US8494732B2 (en) * | 2007-11-04 | 2013-07-23 | GM Global Technology Operations LLC | Method for determining a preferred engine operation in a hybrid powertrain system during blended braking |
US9067580B2 (en) * | 2011-06-01 | 2015-06-30 | Toyota Jidosha Kabushiki Kaisha | Control device for vehicle drive device |
US9126587B2 (en) * | 2011-12-15 | 2015-09-08 | Ford Global Technologies, Llc | Hybrid vehicle drive control system and method for providing motor torque boost compensating for engine delay and torque exceeding maximum engine torque |
GB201201221D0 (en) * | 2012-01-25 | 2012-03-07 | Jaguar Cars | Hybrid electric vehicle and method of control thereof |
FR3001427B1 (en) * | 2013-01-31 | 2016-01-22 | Renault Sas | METHOD FOR ENERGETIC LIMITATION OF THE ACCELERATION ASSISTANCE TORQUE OF A HYBRID VEHICLE |
JP6213334B2 (en) * | 2014-03-26 | 2017-10-18 | トヨタ自動車株式会社 | Hybrid vehicle |
-
2016
- 2016-03-23 FR FR1652470A patent/FR3049249B1/en active Active
-
2017
- 2017-02-02 CN CN201780017039.6A patent/CN108778875B/en active Active
- 2017-02-02 BR BR112018068564-0A patent/BR112018068564A2/en not_active Application Discontinuation
- 2017-02-02 EP EP17708853.1A patent/EP3433148A1/en not_active Withdrawn
- 2017-02-02 WO PCT/FR2017/050231 patent/WO2017162934A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
CN108778875B (en) | 2022-08-16 |
BR112018068564A2 (en) | 2019-02-12 |
FR3049249B1 (en) | 2019-06-14 |
WO2017162934A1 (en) | 2017-09-28 |
FR3049249A1 (en) | 2017-09-29 |
CN108778875A (en) | 2018-11-09 |
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