WO2018047224A1 - ハイブリッド車両の制御方法と制御装置 - Google Patents
ハイブリッド車両の制御方法と制御装置 Download PDFInfo
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- WO2018047224A1 WO2018047224A1 PCT/JP2016/076133 JP2016076133W WO2018047224A1 WO 2018047224 A1 WO2018047224 A1 WO 2018047224A1 JP 2016076133 W JP2016076133 W JP 2016076133W WO 2018047224 A1 WO2018047224 A1 WO 2018047224A1
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- engine
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- hybrid vehicle
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- generator
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- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
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- 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
- B60W2720/00—Output or target parameters relating to overall vehicle dynamics
- B60W2720/40—Torque distribution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/92—Hybrid vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2300/00—Purposes or special features of road vehicle drive control systems
- B60Y2300/70—Control of gearings
- B60Y2300/74—Reducing shift shocks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/09—Reducing noise
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/30—Sensors
- B60Y2400/302—Temperature sensors
-
- 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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Definitions
- the present disclosure relates to a control method and a control device for a hybrid vehicle in which an engine and a generator are directly connected via a gear train including a plurality of gears that mesh with each other.
- This disclosure has been made paying attention to the above-described problem, and aims to prevent continuous rattling noise generated in the gear train when the engine is rotating.
- the present disclosure is directly connected via a gear train composed of a plurality of gears in which the engine and the generator mesh with each other.
- a predetermined torque is continuously applied to the generator so that the transmission torque of the gear train does not continuously fluctuate across the zero torque.
- Example 1 is an overall system diagram showing a drive system and a control system of a series hybrid vehicle (an example of a hybrid vehicle) to which a control method and a control device of Example 1 are applied. It is a flowchart which shows the flow of the rattle prevention & engine operation control processing operation
- Example 1 shown in the drawings.
- the control method and the control device in the embodiment 1 can externally charge the battery, stop the engine while the charge capacity is high, and run the EV. When the charge capacity is low, the series runs the EV while generating electricity with the engine. This is applied to a hybrid vehicle.
- the configuration of the first embodiment will be described by dividing it into “entire system configuration” and “rattle prevention & engine operation control processing configuration”.
- FIG. 1 shows a drive system and a control system of a series hybrid vehicle to which the control method and the control device of the first embodiment are applied.
- the overall system configuration will be described below with reference to FIG.
- the drive system of the series hybrid vehicle includes an engine 1 (ENG), a first motor generator 2 (MG1), a second motor generator 3 (MG2), and a gear box 4. Yes.
- the second motor generator 3 corresponds to a generator.
- the engine 1 is, for example, a gasoline engine or a diesel engine disposed in the front room of the vehicle with the crankshaft direction as the vehicle width direction.
- the main body of the engine 1 is connected and fixed to a gear case 40 of the gear box 4.
- the crankshaft 1a of the engine 1 is connected to the engine shaft 41 of the gear box 4 through a flywheel 1b having a single mass structure and a damper 1c.
- the engine 1 starts the engine using the second motor generator 3 as a starter motor.
- the first motor generator 2 is a three-phase AC permanent magnet synchronous motor that uses a battery 5 mounted as a travel drive source as a power source, and also has a regeneration function during deceleration and braking.
- the stator case of the first motor generator 2 is connected and fixed to the gear case 40 of the gear box 4.
- the rotor of the first motor generator 2 is connected to the first motor shaft 42 of the gear box 4.
- a first inverter 6 is connected to the stator coil of the first motor generator 2 via a first AC harness 6a for converting direct current to three-phase alternating current during power running and converting three-phase alternating current to direct current during regeneration.
- the first inverter 6 and the battery 5 are connected via a first DC harness 6b.
- the second motor generator 3 is a three-phase AC permanent magnet synchronous motor that uses a battery 5 mounted as a generator as a power source, and has both a starter motor function and a motoring operation function of the engine 1.
- the stator case of the second motor generator 3 is connected and fixed to the gear case 40 of the gear box 4.
- the rotor of the second motor generator 3 is connected to the second motor shaft 43 of the gear box 4.
- the stator coil of the second motor generator 3 is connected via a second AC harness 7a to a second inverter 7 that converts direct current to three-phase alternating current during power running and converts three-phase alternating current to direct current during regeneration.
- the second inverter 7 and the battery 5 are connected via a second DC harness 7b.
- the gear box 4 includes a reduction gear train 44, a differential gear unit 45, and a gear train 46 in a gear case 40 to which the engine 1, the first motor generator 2, and the second motor generator 3 are connected and fixed. Composed.
- the reduction gear train 44 is a two-stage reduction gear train for reducing the rotation of the first motor generator 2 and increasing the motor torque to ensure the traveling drive torque.
- the reduction gear train 44 and the first idler shaft 47 And have.
- the first reduction gear stage is configured by meshing the first motor gear 44 a provided on the first motor shaft 42 and the large-diameter idler gear 44 b provided on the first idler shaft 47.
- engages the small diameter idler gear 44c provided in the 1st idler shaft 47 and the output gear 44d provided in the input side of the differential gear unit 45 is comprised.
- the differential gear unit 45 allows the drive torque input via the output gear 44d of the reduction gear train 44 to be rotated right and left via the left and right drive shafts 8 while allowing rotational differential. 1 shows only one wheel).
- the gear train 46 is a gear train that directly connects the engine 1 and the second motor generator 3 (generator) without interposing a clutch, and includes an engine shaft 41, a second idler shaft 48, and a second motor shaft 43. Then, the engine gear 46 a provided on the engine shaft 41, the second idler gear 46 b provided on the second idler shaft 48, and the second motor gear 46 c provided on the second motor shaft 43 are engaged with each other. Consists of. The relationship between the number of gear teeth is engine gear 46a> second motor gear 46c.
- the number of revolutions of engine 1 is increased and power is generated by combustion operation (firing operation) toward second motor generator 3. Transmit necessary engine torque.
- starter operation or motoring operation the rotational speed of the second motor generator 3 is reduced, and motor torque necessary for starter operation or motoring operation is transmitted to the engine 1.
- the control system of the series hybrid vehicle includes a hybrid control module 10 (HCM), a power generation controller 11 (GC), a battery controller 12 (BC), a motor controller 13 (MC), and an engine controller. 14 (EC).
- HCM hybrid control module 10
- GC power generation controller 11
- BC battery controller 12
- MC motor controller 13
- EC engine controller. 14
- the hybrid control module 10 and other controllers are connected by a CAN communication line 15 so that bidirectional information can be exchanged.
- CAN of the CAN communication line 15 is an abbreviation of “Controller Area Network”.
- the hybrid control module 10 is an integrated control means that has a function of appropriately managing the energy consumption of the entire vehicle. That is, information on the battery charge capacity (hereinafter referred to as “SOC (State Of Of Charge)”) is input from the battery controller 12 via the CAN communication line 15. In addition, information is input from an accelerator opening sensor 16, a vehicle speed sensor 17, an engine speed sensor 18, an engine coolant temperature sensor 19, an outside air temperature sensor 20, a door switch 21, a bonnet switch 22, an ignition switch 23, and the like. Various controls are performed based on the input information. Among these, the control performed for the purpose of running a series hybrid vehicle capable of external charging with high fuel efficiency is the selection control of the driving mode (“CD mode”, “CS mode”) based on the SOC of the battery 5. is there. Further, in the region where the SOC of the battery 5 is high, mainly when the CD mode is selected, it is executed based on the engine combustion request instead of the battery charge request. This is engine operation control.
- CD mode driving mode
- CS mode CS mode
- the “CD mode (Charge Depleting mode)” is a mode that gives priority to the EV running that consumes the power of the battery 5 in principle. For example, the “CD mode” is selected while the SOC of the battery 5 decreases from the full SOC to the set SOC.
- the “CS mode (Charge Sustain mode)” is a mode in which priority is given to traveling that maintains the power of the battery 5 by the power generation operation of the engine 1 in principle, and is selected when the SOC of the battery 5 is equal to or lower than the set SOC. Note that the “set SOC” that is the mode switching threshold value has hysteresis between the value when the CD mode ⁇ CS mode and the value when the CS mode ⁇ CD mode.
- the power generation controller 11 performs power running control, regenerative control, and the like of the second motor generator 3 according to a torque control command and a rotation speed control command for the second inverter 7.
- the battery controller 12 manages the SOC of the battery 5, the battery temperature, and the like.
- the motor controller 13 performs power running control, regenerative control, and the like of the first motor generator 2 according to a torque control command and a rotational speed control command for the first inverter 6.
- the engine controller 14 performs start control of the engine 1, stop control of the engine 1, fuel cut control, and the like.
- FIG. 2 shows the flow of the rattle prevention & engine operation control processing operation executed by the hybrid control module 10 of the first embodiment.
- FIG. 2 shows the flow of the rattle prevention & engine operation control processing operation executed by the hybrid control module 10 of the first embodiment.
- step S1 it is determined whether there is an engine combustion request. If YES (engine combustion is requested), the process proceeds to step S2, and if NO (engine combustion is not requested), the process proceeds to step S14.
- the “engine combustion request” is not a battery charge request, but, for example, there is a heating request when the engine coolant temperature is equal to or lower than a set temperature (eg, 20 ° C.) or during EGVR (in the catalyst warm-up mode). (A / C ON at low outside air temperature), etc.
- step S2 it is determined whether or not the SOC is less than the power generation stop threshold A1 following the determination in step S1 that there is an engine combustion request or the determination in step S14 that the door is a doorbon or a hoodbon. If YES (SOC ⁇ A1), the process proceeds to step S3. If NO (SOC ⁇ A1), the process proceeds to step S9.
- step S3 following the determination that SOC ⁇ A1 in step S2, the engine 1 is started, the second motor generator 3 is driven to rotate by the firing rotation of the engine 1, and power is generated. The power generation operation for charging is performed, and the process proceeds to step S4.
- step S4 following the execution of the power generation operation in step S3, the power generation torque (negative torque value) that is continuously applied to the second motor generator 3 is controlled to be a rattle noise suppression power generation torque, and the process proceeds to step S5.
- the “rattle noise suppression power generation torque” is a torque value in which the transmission torque of the gear train 46 does not continuously fluctuate across the zero torque when the torque fluctuation amplitude of the engine shaft torque of the engine 1 is taken into consideration. That means. That is, since the power generation torque becomes the transmission torque of the gear train 46, when the power generation torque request is a torque zero or a value close to the torque zero, the absolute value of the power generation torque is raised to the minimum torque value.
- step S5 following the control for setting the rattle noise suppression power generation torque in step S4, it is determined whether or not the SOC is less than the power generation stop threshold A1 as in step S2. If YES (SOC ⁇ A1), the process proceeds to step S6. If NO (SOC ⁇ A1), the process proceeds to step S9. Here, the SOC determination is performed during the power generation operation in order to ensure a transition from the power generation operation to the motoring operation with good response when the SOC increases during the power generation operation and SOC ⁇ A1.
- Step S6 following the determination that SOC ⁇ A1 in Step S5, it is determined whether or not the outside air temperature at that time is equal to or higher than the set temperature B. If YES (outside temperature ⁇ B), the process proceeds to step S7. If NO (outside temperature ⁇ B), the process proceeds to step S8.
- the outside air temperature at that time is acquired from the outside air temperature sensor 20.
- the “set temperature B” is set to a value at which a passenger requests heating when the outside air temperature is lower than this.
- step S7 following the determination that the outside air temperature ⁇ B in step S6, the target engine speed of the engine 1 is set to the second engine speed, and the process proceeds to the end.
- the target rotational speed of the engine 1 is set to the second engine rotational speed
- the engine target rotational speed is achieved by controlling the rotational speed of the second motor generator 3 that is a generator. If the second motor / generator 3 is controlled so as to achieve the target engine speed, the transmission torque of the gear train 46 automatically exceeds the minimum torque value.
- step S8 following the determination that the outside air temperature ⁇ B in step S6, the target engine speed of the engine 1 is set to the first engine speed that is higher than the second engine speed, and the process goes to the end. move on. If the second motor / generator 3 is controlled so as to achieve the target engine speed, the transmission torque of the gear train 46 automatically exceeds the minimum torque value as described in step S7.
- step S9 following the determination that SOC ⁇ A1 in step S2 or S5, if the engine is operating, the engine 1 is stopped and the second motor generator 3 is switched to the power running side. Then, a motoring operation is performed in which the engine 1 is cranked by the rotational driving force from the second motor generator 3, and the process proceeds to step S10.
- step S10 following the execution of the motoring operation in step S9, it is determined whether or not the SOC has become equal to or greater than the power generation start threshold A2 due to the decrease in the SOC due to the motoring operation. If YES (SOC ⁇ A2), the process proceeds to step S11. If NO (SOC ⁇ A2), the process proceeds to step S3.
- the “power generation start threshold A2” is a value at which the motoring operation is executed when the SOC is equal to or higher than the power generation stop threshold A1, but can be returned to the power generation operation due to a decrease in the charge capacity during the motoring operation. (Example: about 88%).
- step S11 following the determination that SOC ⁇ A2 in step S10, it is determined whether or not the outside air temperature at that time is equal to or higher than the set temperature B as in step S6. If YES (outside temperature ⁇ B), the process proceeds to step S12. If NO (outside temperature ⁇ B), the process proceeds to step S13.
- step S12 following the determination that the outside air temperature ⁇ B in step S11, the target engine speed of the engine 1 is set to the fourth engine speed, and the process proceeds to the end.
- the target rotational speed of the engine 1 is set to the fourth engine rotational speed
- the engine target rotational speed is achieved by controlling the motor rotational speed of the second motor generator 3 that is a generator. If the second motor / generator 3 is controlled so as to achieve the target engine speed, the transmission torque of the gear train 46 automatically exceeds the minimum torque value.
- step S13 following the determination in step S11 that the outside air temperature ⁇ B, the target engine speed of the engine 1 is set to the third engine speed that is higher than the fourth engine speed, and the process goes to the end. move on. If the second motor / generator 3 is controlled to rotate the motor so as to achieve the target engine speed, the transmission torque of the gear train 46 automatically exceeds the minimum torque value as described in step S12.
- step S14 following the determination that there is no engine combustion request in step S1, it is determined whether it is a doorbon or a hoodbon. If YES (door or hood), the process proceeds to step S2, and if NO (not a door and hood), the process proceeds to step S15.
- door bon means to get off with the vehicle door open, and is determined by a switch signal from the door switch 21 or the ignition switch 23.
- Foodbon means to get off with the engine hood or trunk hood open, and is determined by a switch signal from the bonnet switch 22 or the ignition switch 23.
- step S15 following the determination in step S14 that it is not a doorbon or a hoodbon, the engine 1 is stopped and the process proceeds to the end. That is, when there is no engine combustion request and the door and hood are not doors, selection control of “CD mode” and “CS mode” is executed based on the SOC of the battery 5.
- the relationship between the first engine speed and the second engine speed in the power generation operation and the third engine speed and the fourth engine speed in the motoring operation is set as follows.
- (third engine speed and fourth engine speed: motoring speed)> (first engine speed and first engine speed) (2 engine rotation speed: firing rotation speed) is set (see FIG. 6).
- the relationship between the rotational speed and the second engine rotational speed: firing speed is set (see FIG. 7).
- the operation of the first embodiment will be described by dividing it into “rattle prevention & engine operation control processing operation”, “background technology of rattle prevention”, “characteristic operation of rattle prevention control”, and “characteristic operation of engine operation control”.
- step S1 For example, immediately after the ignition is turned on, when the engine coolant temperature is low, the engine combustion is requested, SOC ⁇ A1, and the outside air temperature ⁇ B, step S1 ⁇ step S2 ⁇ step S9 ⁇
- the process proceeds from step S10 to step S11 to step S13 to end.
- step S ⁇ b> 9 a motoring operation is performed in which the engine 1 is cranked and rotated by the rotational driving force from the second motor generator 3.
- step S13 the target rotational speed of the engine 1 is set to a third engine rotational speed that is higher than the fourth engine rotational speed, and the second motor generator 3 is controlled by the motor rotational speed.
- step S ⁇ b> 3 the engine 1 is started, and the second motor generator 3 is rotationally driven by the firing rotation of the engine 1 to generate power, and a power generation operation for charging the generated power to the battery 5 is executed.
- step S4 control is performed so that the power generation torque (negative torque value) continuously applied to the second motor generator 3 is the rattle noise suppression power generation torque.
- step S8 the target rotational speed of the engine 1 is set to the first engine rotational speed that is higher than the second engine rotational speed, and the second motor generator 3 is controlled by the motor rotational speed.
- step S2 when the SOC of the battery 5 increases due to the execution of the power generation operation and SOC ⁇ A1, the process proceeds from step S2 or step S5 to step S9 ⁇ step S10 ⁇ step S11 ⁇ step S13 ⁇ end in the flowchart of FIG. That is, the motoring operation is switched again.
- step S9 when the SOC of the battery 5 decreases due to the execution of the motoring operation and SOC ⁇ A2, in the flowchart of FIG. 2, from step S10 to step S3 ⁇ step S4 ⁇ step S5 ⁇ step S6 ⁇ step S8 ⁇ end. move on. That is, the power generation operation is switched again.
- the motoring operation and the power generation operation are repeatedly executed according to the change in the SOC.
- the target engine speed of the engine 1 is set to the third engine speed (motoring operation) and the first engine speed (power generation operation), and the second motor generator 3 is operated by the motor.
- the number of revolutions is controlled.
- the target engine speed of the engine 1 is set to the fourth engine speed (motoring operation) and the second engine speed (power generation operation), and the second motor generator 3 rotates the motor. Number controlled.
- step S1 if it is determined that the doorbon or the hoodbon is determined, the process proceeds from step S1 to step S14 to step S2 and subsequent steps in the flowchart of FIG. That is, the motoring operation and the power generation operation are repeatedly executed according to the change in the SOC, as in the case where the engine combustion request is made. If it is determined that there is no engine combustion request and it is not a doorbon or a hoodbon, the process proceeds from step S1 to step S14 to step S15 to end in the flowchart of FIG. In step S15, the engine 1 is stopped, and “CD mode” and “CS mode” selection control is executed based on the SOC of the battery 5.
- the SOC power generation stop threshold A1 and the power generation start threshold A2 are used.
- the ring operation and the power generation operation are repeatedly performed. Since the power generation operation at this time is not based on the battery charge request, the power generation torque is set to zero or a low value close to zero, but the power generation torque (negative torque) is suppressed to suppress the rattle noise. Moreover, the driving torque (positive torque) that suppresses rattle noise is also used for motoring operation.
- the torque transmission direction of the gear train is repeated in the reverse direction to the forward direction, and the tooth surfaces of the gears meshing with each other alternately collide with each other in the gear train, and a continuous rattling sound called “Rattle” is generated. That is, the condition for generating the rattle is due to the fact that the torque fluctuation amplitude of the engine itself is larger than the engine shaft torque given by the power generation torque, as is apparent from FIG. That is, when the engine shaft torque is T and the torque fluctuation amplitude is I ⁇ d 2 ⁇ (d 2 ⁇ : angular acceleration), the condition for generating the rattle is that T ⁇ I ⁇ d 2 ⁇ .
- the dual flywheel of (a) has two plates and an annular coil spring for connecting the two plates so that they can rotate relative to each other. There is. Also, the weight increases.
- the sub-gear (b) there is a layout problem because a space for additional setting of the sub-gear is required. Further, there is sub-gear noise as a rebound performance.
- the low rigidity damper (c) there is a problem of cost increase.
- the engine shaft torque is increased by increasing the torque with respect to the second motor generator 3 that is a load for the engine 1. Therefore, as shown in FIG. 4, even if there is a torque fluctuation amplitude in the torque characteristics of the engine 1, the transmission torque of the gear train 46 does not fluctuate continuously across the zero torque, and the torque transmission direction of the gear train 46 does not change. It is defined in either the forward direction or the reverse direction. Therefore, in the gear train 46, the contact tooth surfaces of the gears 46a, 46b, 46c meshing with each other are determined by the torque transmission direction, and a continuous rattling sound called "Rattle" is not generated.
- the gear transmission torque is managed by the torque control with respect to the second motor generator 3, thereby preventing a continuous rattling sound generated in the gear train 46 when the engine 1 is in a rotating state. it can.
- the dual flywheel, sub gear, low rigidity damper, and clutch are not used, so the unit size can be reduced, the weight can be reduced, and the cost can be reduced. it can.
- the predetermined torque that is continuously applied to the second motor generator 3 continuously varies with the transmission torque of the gear train 46 across the zero torque when the torque fluctuation amplitude of the engine shaft torque of the engine 1 is taken into consideration. Torque value that does not occur.
- the engine shaft torque is T, the torque fluctuation amplitude I ⁇ d 2 ⁇ : when the (d 2 theta angular acceleration), as shown in FIG. 4, a condition in which rattling is not generated T> I ⁇ d 2 ⁇ is satisfied.
- the engine shaft torque T satisfies T> I ⁇ d 2 ⁇ and suppresses a deviation from the torque fluctuation amplitude I ⁇ d 2 ⁇ . For this reason, for example, the power generation torque that increases the charging capacity of the battery 5 does not become higher than necessary.
- the torque fluctuation amplitude of the engine shaft torque of the engine 1 the continuous torque generated in the gear train 46 is surely generated without increasing the torque applied to the second motor generator 3 more than necessary. A rattling sound can be prevented.
- the predetermined torque that is continuously applied to the second motor generator 3 is a negative torque value during the power generation operation in which the engine 1 rotates the second motor generator 3.
- the torque value is positive.
- the object for managing the gear transmission torque in the gear train 46 is not limited to the power generation operation in which the second motor generator 3 is rotated by the engine 1 but also includes the motoring operation in which the engine 1 is rotated by the second motor generator 3. It is. For this reason, it is possible to prevent a continuous rattling sound generated in the gear train 46 in both the power generation operation and motoring operation scenes.
- Example 1 when it is determined that the door or the hood remains open when there is no combustion request for the engine 1, engine operation control according to the charge capacity (SOC) of the battery 5 is executed.
- SOC charge capacity
- the motoring operation can be executed even when the door or the hood is kept open, even when the SOC of the battery 5 is fully charged.
- the engine 1 by utilizing the engine operation control according to the SOC when there is no engine combustion request, the engine 1 generates a driving sound at the time of a doorbon or hoodbon where there is no engine combustion request, so that it is a doorbon or a hoodbon The occupant can be warned.
- Example 1 when the engine 1 is in a cold state and there is a combustion request for the engine 1, engine operation control according to the SOC of the battery 5 is executed.
- the engine 1 when the engine 1 is in a cold state and there is a combustion request for the engine 1, if the SOC of the battery 5 is fully charged and the power generation operation is performed in response to the combustion request for the engine 1, the power generation torque is zero or a small value close to zero. And rattle is generated.
- the engine 1 when the engine 1 is in a cold state and there is a combustion request for the engine 1, even if the SOC of the battery 5 is in the full charge region, the motoring operation is performed first and the SOC of the battery 5 is reduced. It is possible to shift to power generation operation.
- the engine 1 when the engine 1 is in a cold state and there is a combustion request for the engine 1, it is possible to perform a heating assist operation in response to the combustion request for the engine 1 while preventing the occurrence of rattle.
- the motoring rotational speed (third and fourth engine rotational speeds) of the engine 1 is set to the power generation rotational speed ( Higher than the first and second engine speeds).
- the engine noise during the motoring operation of the engine 1 is lower than the engine noise during the firing operation.
- the motoring rotation speed (third and fourth engine rotation speed) of the engine 1 higher than the power generation rotation speed (first and second engine rotation speed)
- the difference in engine noise level is kept small. Therefore, when there is an engine combustion request and the power generation operation and the motoring operation are repeated, the timbre change of the engine noise can be suppressed small.
- the motoring rotational speed (third and fourth engine rotational speeds) of the engine 1 is set to the power generation rotational speed ( Lower than the first and second engine speeds).
- the exhaust noise from outside the vehicle during motoring operation of the engine 1 is higher than the exhaust noise from the firing operation.
- the motoring rotational speed (third and fourth engine rotational speeds) of the engine 1 lower than the power generation rotational speed (first and second engine rotational speeds)
- the difference in the level of exhausting noise outside the vehicle can be kept small. Therefore, when there is an engine combustion request and the power generation operation and the motoring operation are repeated, it is possible to suppress the timbre change of the exhausting sound outside the vehicle.
- the motoring rotation speed and the power generation rotation speed of the engine 1 are the first and third engine rotation speeds when the outside air temperature is lower than the set temperature B, and the second and fourth speeds when the outside air temperature is higher than the set temperature B. Set higher than engine speed.
- the outside air temperature when the outside air temperature is low during the motoring operation, there is a demand to lower the SOC of the battery 5 as soon as possible to prepare for the heating operation by the firing rotation.
- the outside air temperature if the outside air temperature is high during the motoring operation, there is no request to prepare for the heating operation, and there is a request to reduce the exhausting noise as much as possible.
- the first and third engine speeds when the outside air temperature is lower than the set temperature B are determined from the second and fourth engine speeds when the outside temperature is equal to or higher than the set temperature B. Is also set high.
- the engine 1 and the generator (second motor generator 3) are directly connected via a gear train 46 including a plurality of gears 46a, 46b, 46c that mesh with each other.
- a predetermined torque is supplied to the generator (second motor generator 3) so that the transmission torque of the gear train 46 does not continuously fluctuate across the zero torque. Is continuously applied (FIG. 4). Therefore, it is possible to provide a method for controlling a hybrid vehicle (series hybrid vehicle) that prevents continuous rattling noise generated in the gear train 46 when the engine 1 is in a rotating state.
- the predetermined torque that is continuously applied to the generator (second motor generator 3) is a continuous torque with the transmission torque of the gear train 46 sandwiching zero torque when the torque fluctuation amplitude of the engine shaft torque of the engine 1 is taken into consideration.
- the torque value does not vary (FIG. 4). For this reason, in addition to the effect (1), the continuous rattling noise (rattle) that is reliably generated in the gear train 46 without increasing the torque applied to the generator (second motor generator 3) more than necessary. ) Can be prevented.
- the predetermined torque that is continuously applied to the generator (second motor generator 3) is a negative torque value during the power generation operation in which the generator (second motor generator 3) is rotated by the engine 1, and the generator In the motoring operation in which the engine 1 is rotated by the (second motor generator 3), the torque value is positive (FIG. 5).
- continuous rattling noise (rattle) generated in the gear train 46 can be prevented in both the power generation operation and motoring operation scenes.
- a battery 5 electrically connected to the generator (second motor generator 3) is provided.
- the motoring operation is executed if the charging capacity (SOC) of the battery 5 is equal to or greater than the power generation stop threshold A1, and during the motoring operation, the charging capacity of the battery 5 is set to the power generation start threshold A2. If it is less than that, it shifts to power generation operation (FIG. 2). For this reason, in addition to the effect of (3), when there is a combustion request of the engine 1, even if the charge capacity (SOC) of the battery 5 is equal to or greater than the power generation stop threshold A1, the power generation operation is performed in response to the combustion request of the engine 1. Can be secured.
- An outside air temperature sensor 20 for detecting the outside air temperature is provided.
- the motoring rotation speed and the power generation rotation speed of the engine 1 are the rotation speed when the outside air temperature is lower than the set temperature B (first and third engine rotation speeds) and the rotation speed when the outside temperature is equal to or higher than the set temperature B (second, (4th engine speed) is set higher (FIGS. 6 and 7). For this reason, in addition to the effects of (7) and (8), when there is an engine combustion request and the power generation operation and the motoring operation are repeated, the exhausting noise can be reduced while responding to the heating request.
- the engine 1 and the generator (second motor generator 3) are directly connected via a gear train 46 that meshes with each other.
- a controller for controlling the command torque of the generator (second motor generator 3) is provided in the control device for the hybrid vehicle (series hybrid vehicle).
- the controller determines whether the transmission torque of the gear train 46 does not continuously fluctuate across the zero torque when the engine 1 is in a rotating state with respect to the generator (second motor generator 3). Is continuously applied (FIG. 1). Therefore, it is possible to provide a method for controlling a hybrid vehicle (series hybrid vehicle) that prevents continuous rattling noise generated in the gear train 46 when the engine 1 is in a rotating state.
- the relationship of motoring rotational speed> firing rotational speed is set.
- firing rotational speed is set.
- the above two specifications may be an example that can be selected according to the passenger's preference by using a switch or the like in the vehicle interior, or as an example in which the above two specifications are automatically switched according to the vehicle state or the running state. Also good.
- Example 1 an example in which the control method and the control device of the present disclosure are applied to a series hybrid vehicle is shown.
- the control method and the control device of the present disclosure can be applied to a parallel hybrid vehicle, and can also be applied to a hybrid vehicle using both series and parallel.
- any control method and control device for a hybrid vehicle having a drive system in which an engine and a generator are directly connected via a gear train composed of a plurality of gears meshing with each other can be applied.
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Abstract
Description
このハイブリッド車両の制御方法において、エンジンが回転状態であるとき、ギヤトレーンの伝達トルクがゼロトルクを挟んで連続的に変動することがないよう、発電機に対し所定のトルクを付与し続ける。
実施例1における制御方法と制御装置は、バッテリへの外部充電が可能であり、充電容量が高い間はエンジンを停止してEV走行し、充電容量が低くなるとエンジンにより発電しながらEV走行するシリーズハイブリッド車両に適用したものである。以下、実施例1の構成を、「全体システム構成」、「ラトル防止&エンジン運転制御処理構成」に分けて説明する。
図1は、実施例1の制御方法と制御装置が適用されたシリーズハイブリッド車両の駆動系と制御系を示す。以下、図1に基づいて全体システム構成を説明する。
ここで、ハイブリッドコントロールモジュール10と他のコントローラ(発電コントローラ11、バッテリコントローラ12、モータコントローラ13、エンジンコントローラ14、等)とは、CAN通信線15により双方向情報交換可能に接続されている。なお、CAN通信線15の「CAN」とは「Controller Area Network」の略称である。
図2は、実施例1のハイブリッドコントロールモジュール10にて実行されるラトル防止&エンジン運転制御処理作動の流れを示す。以下、ラトル防止&エンジン運転制御処理構成をあらわす図2の各ステップについて説明する。なお、図2のフローチャートは、所定の制御周期毎に繰り返し実行される。
ここで、「エンジン燃焼要求」は、バッテリ充電要求ではなく、例えば、エンジン冷却水温が設定温度(例:20℃)以下のとき、EGVR中(触媒暖機モード中)のとき、暖房要求があるとき(低外気温時でのA/C ON)、等において出される。
ここで、「発電停止閾値A1」は、フル充電領域であるが、減速走行等による回生充電分の充電容量を許容可能なSOC上限域の値に設定される(例:SOC=90%程度)。
ここで、「ラトル音抑制発電トルク」とは、エンジン1のエンジン軸トルクのトルク変動振幅を考慮したとき、ギヤトレーン46の伝達トルクがゼロトルクを挟んで連続的に変動することがないトルク値にすることをいう。つまり、発電トルクがギヤトレーン46の伝達トルクになるため、発電トルク要求としてはトルクゼロ、又は、トルクゼロに近い値のとき、発電トルク絶対値を最低トルク値まで嵩上げしておくことをいう。
ここで、発電運転中にSOC判断を行うのは、発電運転中にSOCが上昇してSOC≧A1となると、応答良く発電運転からモータリング運転への移行を確保するためである。
ここで、「そのときの外気温」は、外気温センサ20から取得する。「設定温度B」は、これ以上外気温度が低いと乗員により暖房要求があるとされる値に設定される。
ここで、エンジン1の目標回転数が第2エンジン回転数に設定されると、発電機である第2モータジェネレータ3を回転数制御にすることで、エンジン目標回転数を達成する。なお、エンジン目標回転数を達成するように第2モータジェネレータ3をモータ回転数制御にすると、自動的にギヤトレーン46の伝達トルクが最低トルク値を上回ることになる。
なお、エンジン目標回転数を達成するように第2モータジェネレータ3をモータ回転数制御にすると、ステップS7で述べたように、自動的にギヤトレーン46の伝達トルクが最低トルク値を上回ることになる。
ここで、「発電開始閾値A2」は、SOCが発電停止閾値A1以上であることでモータリング運転を実行したが、モータリング運転中における充電容量の減少により、発電運転に戻すことが可能な値に設定される(例:88%程度)。
ここで、エンジン1の目標回転数が第4エンジン回転数に設定されると、発電機である第2モータジェネレータ3をモータ回転数制御にすることで、エンジン目標回転数を達成する。なお、エンジン目標回転数を達成するように第2モータジェネレータ3をモータ回転数制御にすると、自動的にギヤトレーン46の伝達トルクが最低トルク値を上回ることになる。
なお、エンジン目標回転数を達成するように第2モータジェネレータ3をモータ回転数制御にすると、ステップS12で述べたように、自動的にギヤトレーン46の伝達トルクが最低トルク値を上回ることになる。
ここで、「ドアボン」とは、車両用ドアを開けたままで降車しようとすることをいい、ドアスイッチ21やイグニッションスイッチ23からのスイッチ信号により判断する。「フードボン」とは、エンジンフードやトランクフードを開けたままで降車しようとすることをいい、ボンネットスイッチ22やイグニッションスイッチ23からのスイッチ信号により判断する。
発電運転とモータリング運転が繰り返されるとき、エンジン騒音を揃えたい仕様の車両のときは、(第3エンジン回転数及び第4エンジン回転数:モータリング回転数)>(第1エンジン回転数及び第2エンジン回転数:ファイアリング回転数)の関係に設定する(図6参照)。一方、発電運転とモータリング運転が繰り返されるとき、車外のこもり音を揃えたい仕様の車両のときは、(第3エンジン回転数及び第4エンジン回転数:モータリング回転数)<(第1エンジン回転数及び第2エンジン回転数:ファイアリング回転数)の関係に設定する(図7参照)。
実施例1の作用を、「ラトル防止&エンジン運転制御処理作用」、「ラトル防止の背景技術」、「ラトル防止制御の特徴作用」、「エンジン運転制御の特徴作用」に分けて説明する。
以下、図2のフローチャートに基づき、ラトル防止&エンジン運転制御処理作用を説明する。
イグニッションオン時、エンジン冷却水温が低いときや暖房要求があるとき等で、エンジン燃焼要求があっても、シリーズハイブリッド車両の場合、停車している間のプラグイン充電によりバッテリのSOCは、フル充電容量域にある。従って、エンジンを燃焼運転すると、発電機への発電トルクは、ゼロ、或いは、ゼロに近い低い値にせざるを得ない。このため、発電トルク(=エンジン軸トルク)を低トルクに抑えた発電運転時には、図3に示すように、エンジンと発電機を直結するギヤトレーンの伝達トルクがゼロトルクを挟んで連続的に変動する。従って、ギヤトレーンのトルク伝達方向が正方向と逆方向に繰り返され、ギヤトレーンにおいて、互いに噛み合うギヤの歯面同士が交互にぶつかり合い、“ラトル”と呼ばれる連続的な歯打ち音が発生してしまう。即ち、ラトルが発生する条件は、図3から明らかなように、発電トルクにより与えられているエンジン軸トルクより、エンジンそのもののトルク変動振幅が大きいことに起因している。つまり、エンジン軸トルクをTとし、トルク変動振幅をI・d2θ(d2θ:角加速度)としたとき、T<I・d2θであることがラトルの発生条件になる。
(a)デュアルフライホイール(Dual Mass Flywheel)によるトルク変動振幅の低減。
(b)歯打ちギヤへのサブギヤ追加による歯打ち抑制トルクの付加。
(c)低剛性ダンパーによるトルク変動振幅の低減。
により、ギヤトレーンの伝達トルクの変動幅を抑える対策が提案されている。
(b)のサブギヤの場合は、サブギヤを追加設定するスペースが必要なためレイアウト課題がある。又、跳ね返り性能としてサブギヤノイズがある。
(c)の低剛性ダンパーの場合は、コスト増の課題がある。
実施例1では、シリーズハイブリッド車両の制御方法において、エンジン1が回転状態であるとき、ギヤトレーン46の伝達トルクがゼロトルクを挟んで連続的に変動することがないよう、第2モータジェネレータ3に対し所定のトルクを付与し続ける。
実施例1では、エンジン1の燃焼要求があるとき、バッテリ5のSOCが発電停止閾値A1以上であるとモータリング運転を実行する。モータリング運転の実行中、バッテリ5のSOCが発電開始閾値A2未満になると発電運転に移行する。
実施例1におけるシリーズハイブリッド車両の制御方法と制御装置にあっては、下記に列挙する効果が得られる。
このシリーズハイブリッド車両の制御方法において、エンジン1が回転状態であるとき、ギヤトレーン46の伝達トルクがゼロトルクを挟んで連続的に変動することがないよう、発電機(第2モータジェネレータ3)に対し所定のトルクを付与し続ける(図4)。
このため、エンジン1が回転状態であるとき、ギヤトレーン46で発生する連続的な歯打ち音(ラトル)を防止するハイブリッド車両(シリーズハイブリッド車両)の制御方法を提供することができる。
このため、(1)の効果に加え、発電機(第2モータジェネレータ3)に対して付与するトルクを必要以上に高くすることなく、確実にギヤトレーン46で発生する連続的な歯打ち音(ラトル)を防止することができる。
このため、(2)の効果に加え、発電運転とモータリング運転の両運転シーンにおいて、ギヤトレーン46で発生する連続的な歯打ち音(ラトル)を防止することができる。
エンジン1の燃焼要求があるとき、バッテリ5の充電容量(SOC)が発電停止閾値A1以上であるとモータリング運転を実行し、モータリング運転の実行中、バッテリ5の充電容量が発電開始閾値A2未満になると発電運転に移行する(図2)。
このため、(3)の効果に加え、エンジン1の燃焼要求があるとき、バッテリ5の充電容量(SOC)が発電停止閾値A1以上であっても、エンジン1の燃焼要求に応えて発電運転を確保することができる。
このため、(4)の効果に加え、エンジン燃焼要求がないドアボン時やフードボン時、エンジン1から運転音を発することで、ドアボンやフードボンであることを乗員に警告することができる。
このため、(4)又は(5)の効果に加え、エンジン1が冷機状態でエンジン1の燃焼要求があるとき、ラトルの発生を防止しつつ、エンジン1の燃焼要求に応えた暖房補助運転を行うことができる。
このため、(4)~(6)の効果に加え、エンジン燃焼要求があり、発電運転とモータリング運転が繰り返されるとき、エンジン騒音の音色変化を小さく抑えることができる。
このため、(4)~(6)の効果に加え、エンジン燃焼要求があり、発電運転とモータリング運転が繰り返されるとき、車外の排気こもり音の音色変化を小さく抑えることができる。
エンジン1のモータリング回転数と発電回転数は、外気温度が設定温度B未満のときの回転数(第1、第3エンジン回転数)を、設定温度B以上のときの回転数(第2、第4エンジン回転数)よりも高く設定する(図6、図7)。
このため、(7),(8)の効果に加え、エンジン燃焼要求があり、発電運転とモータリング運転が繰り返されるとき、暖房要求に応えつつ、排気こもり音を低減することができる。
このハイブリッド車両(シリーズハイブリッド車両)の制御装置において、発電機(第2モータジェネレータ3)の指示トルクを制御するコントローラ(ハイブリッドコントロールモジュール10)を設ける。
コントローラ(ハイブリッドコントロールモジュール10)は、エンジン1が回転状態であるとき、ギヤトレーン46の伝達トルクがゼロトルクを挟んで連続的に変動することがないよう、発電機(第2モータジェネレータ3)に対し所定のトルクを付与し続ける(図1)。
このため、エンジン1が回転状態であるとき、ギヤトレーン46で発生する連続的な歯打ち音(ラトル)を防止するハイブリッド車両(シリーズハイブリッド車両)の制御方法を提供することができる。
Claims (10)
- エンジンと発電機が互いに噛み合う複数のギヤからなるギヤトレーンを介して直結されているハイブリッド車両の制御方法において、
前記エンジンが回転状態であるとき、前記ギヤトレーンの伝達トルクがゼロトルクを挟んで連続的に変動することがないよう、前記発電機に対し所定のトルクを付与し続ける
ことを特徴とするハイブリッド車両の制御方法。 - 請求項1に記載されたハイブリッド車両の制御方法において、
前記発電機に対し付与し続ける所定のトルクは、前記エンジンのエンジン軸トルクのトルク変動振幅を考慮したとき、前記ギヤトレーンの伝達トルクがゼロトルクを挟んで連続的に変動することがないトルク値とする
ことを特徴とするハイブリッド車両の制御方法。 - 請求項2に記載されたハイブリッド車両の制御方法において、
前記発電機に対し付与し続ける所定のトルクは、前記エンジンにより前記発電機を回す発電運転のときは負のトルク値であり、前記発電機により前記エンジンを回すモータリング運転のときは正のトルク値である
ことを特徴とするハイブリッド車両の制御方法。 - 請求項3に記載されたハイブリッド車両の制御方法において、
前記発電機と電気的に接続されるバッテリを備え、
前記エンジンの燃焼要求があるとき、前記バッテリの充電容量が発電停止閾値以上であると前記モータリング運転を実行し、前記モータリング運転の実行中、前記バッテリの充電容量が発電開始閾値未満になると前記発電運転に移行する
ことを特徴とするハイブリッド車両の制御方法。 - 請求項4に記載されたハイブリッド車両の制御方法において、
前記エンジンの燃焼要求がないとき、ドアやフードを開けたままであると判定されると、前記バッテリの充電容量に応じたエンジン運転制御を実行する
ことを特徴とするハイブリッド車両の制御方法。 - 請求項4又は請求項5に記載されたハイブリッド車両の制御方法において、
前記エンジンが冷機状態で前記エンジンの燃焼要求があるとき、前記バッテリの充電容量に応じたエンジン運転制御を実行する
ことを特徴とするハイブリッド車両の制御方法。 - 請求項4から請求項6までの何れか一項に記載されたハイブリッド車両の制御方法において、
前記バッテリの充電容量の上昇/低下に伴って前記発電運転と前記モータリング運転が繰り返されるとき、前記エンジンのモータリング回転数を発電回転数よりも高く設定する
ことを特徴とするハイブリッド車両の制御方法。 - 請求項4から請求項6までの何れか一項に記載されたハイブリッド車両の制御方法において、
前記バッテリの充電容量の上昇/低下に伴って前記発電運転と前記モータリング運転が繰り返されるとき、前記エンジンのモータリング回転数を発電回転数よりも低く設定する
ことを特徴とするハイブリッド車両の制御方法。 - 請求項7又は請求項8に記載されたハイブリッド車両の制御方法において、
外気温度を検出する外気温センサを設け、
前記エンジンのモータリング回転数と発電回転数は、前記外気温度が設定温度未満のときの回転数を、設定温度以上のときの回転数よりも高く設定する
ことを特徴とするハイブリッド車両の制御方法。 - エンジンと発電機が互いに噛み合うギヤトレーンを介して直結されているハイブリッド車両の制御装置において、
前記発電機の指示トルクを制御するコントローラを設け、
前記コントローラは、前記エンジンが回転状態であるとき、前記ギヤトレーンの伝達トルクがゼロトルクを挟んで連続的に変動することがないよう、前記発電機に対し所定のトルクを付与し続ける
ことを特徴とするハイブリッド車両の制御装置。
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MX2019002548A MX2019002548A (es) | 2016-09-06 | 2016-09-06 | Metodo de control y dispositivo de control para vehiculo hibrido. |
BR112019004153-2A BR112019004153B1 (pt) | 2016-09-06 | 2016-09-06 | Método de controle e dispositivo de controle para veículo híbrido |
CN201680089038.8A CN109689456B (zh) | 2016-09-06 | 2016-09-06 | 混合动力车辆的控制方法和控制装置 |
EP16915644.5A EP3511216B1 (en) | 2016-09-06 | 2016-09-06 | Hybrid vehicle control method and control device |
CA3036027A CA3036027C (en) | 2016-09-06 | 2016-09-06 | Control method and control device for hybrid vehicle |
KR1020197007306A KR102139512B1 (ko) | 2016-09-06 | 2016-09-06 | 하이브리드 차량의 제어 방법과 제어 장치 |
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US16/328,747 US11084484B2 (en) | 2016-09-06 | 2016-09-06 | Hybrid vehicle control method and control device |
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JP2021035177A (ja) * | 2019-08-26 | 2021-03-01 | 三菱重工業株式会社 | 配電システムおよび配電方法 |
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EP3511216B1 (en) | 2020-07-29 |
CA3036027C (en) | 2022-03-22 |
EP3511216A1 (en) | 2019-07-17 |
EP3511216A4 (en) | 2019-09-25 |
CN109689456A (zh) | 2019-04-26 |
JPWO2018047224A1 (ja) | 2019-02-21 |
CA3036027A1 (en) | 2018-03-15 |
RU2722810C1 (ru) | 2020-06-04 |
CN109689456B (zh) | 2021-10-29 |
MX2019002548A (es) | 2019-06-17 |
US11084484B2 (en) | 2021-08-10 |
KR102139512B1 (ko) | 2020-07-31 |
KR20190034338A (ko) | 2019-04-01 |
BR112019004153A2 (pt) | 2019-05-28 |
US20190184975A1 (en) | 2019-06-20 |
BR112019004153B1 (pt) | 2023-01-17 |
JP6819685B2 (ja) | 2021-01-27 |
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