WO2022238059A1 - STEUERVORRICHTUNG ZUM BETRIEB EINES STRAßENGEKOPPELTEN ALLRADFAHRZEUGES - Google Patents
STEUERVORRICHTUNG ZUM BETRIEB EINES STRAßENGEKOPPELTEN ALLRADFAHRZEUGES Download PDFInfo
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- WO2022238059A1 WO2022238059A1 PCT/EP2022/059348 EP2022059348W WO2022238059A1 WO 2022238059 A1 WO2022238059 A1 WO 2022238059A1 EP 2022059348 W EP2022059348 W EP 2022059348W WO 2022238059 A1 WO2022238059 A1 WO 2022238059A1
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- torque
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- gradient
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- 230000000670 limiting effect Effects 0.000 claims abstract description 4
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- 230000001186 cumulative effect Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
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Classifications
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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
- 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
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- 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
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
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- 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
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/354—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having separate mechanical assemblies for transmitting drive to the front or to the rear wheels or set of wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
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- 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
- B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
- B60K23/08—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles
- B60K23/0808—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles for varying torque distribution between driven axles, e.g. by transfer clutch
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2045—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for optimising the use of energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B60W10/119—Conjoint control of vehicle sub-units of different type or different function including control of all-wheel-driveline means, e.g. transfer gears or clutches for dividing torque between front and rear axle
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- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/40—Electrical machine applications
- B60L2220/42—Electrical machine applications with use of more than one motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/14—Acceleration
- B60L2240/16—Acceleration longitudinal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2250/00—Driver interactions
- B60L2250/12—Driver interactions by confirmation, e.g. of the input
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
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- B60L2250/28—Accelerator pedal thresholds
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2260/00—Operating Modes
- B60L2260/20—Drive modes; Transition between modes
- B60L2260/26—Transition between different drive modes
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B60W2540/106—Rate of change
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
- B60W2710/085—Torque change rate
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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
- B60W2720/403—Torque distribution between front and rear axle
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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
- B60Y2200/91—Electric vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Definitions
- Control device for operating a road-coupled four-wheel drive vehicle
- the invention relates to a control device for operating a road-coupled all-wheel drive vehicle with at least one electronic control unit, with a first drive motor (in particular a first electric drive motor) assigned to a primary axle (e.g. rear axle) and with one assigned to a secondary axle (e.g. front axle).
- first drive motor in particular a first electric drive motor
- secondary axle e.g. front axle
- second drive motor in particular second electric drive motor
- a road-coupled hybrid vehicle with two different drive units on the respective axle is known from DE 102014200427 A1, for example.
- the different drive units in particular an internal combustion engine and an electric drive motor, have different dynamic properties; i.e. the target torques on the individual axes cannot be set equally quickly.
- a torque increase using an electric drive motor is possible much faster than the same torque increase using an internal combustion engine.
- the electronic control known from DE 102014200427 A1 deals in particular with the problems of these different drive units.
- the primary and secondary motors are not connected via a clutch, but only via the 2
- Wheels drive-related coupled through the road are also referred to as “axle-split” vehicles.
- Such all-wheel drive vehicles are usually operated in a first operating mode (preferably an efficiency-optimized drive mode) with the primary motor alone (single-axle operation) and in a second operating mode (preferably a performance-optimized drive mode) in which the secondary motor can be switched on and off automatically, can also be operated as a four-wheel drive vehicle with both drive motors (two-axle operation).
- the invention relates to a control device for operating a road-coupled four-wheel drive vehicle with at least one electronic control unit, with at least one first drive motor (preferably an electric drive motor) assigned to a primary axle as the primary motor, and with at least one second drive motor (preferably also an electric drive motor) assigned to a secondary axle as the secondary motor.
- first drive motor preferably an electric drive motor
- second drive motor preferably also an electric drive motor
- the gradient limitation module preferably also prevents the direction of the gradient for adjusting the torque of the primary motor from running in the opposite direction to the direction of the gradient of the driver's request signal as part of a change in the target four-wheel drive factor.
- the torque of the primary engine must not decrease as the driver's request gradient increases, but is kept constant, while the torque of the secondary engine is increased until the target all-wheel drive factor is reached.
- the torque of the primary engine must not be increased when the driver's request gradient decreases, but is also kept constant, while the torque of the secondary engine is reduced until the target four-wheel drive factor is reached.
- the torque of the secondary motor in particular is kept constant.
- the torque of the primary motor and/or the secondary motor is, exceptionally, with a larger gradient (e.g. +/- 20 Nm/dt (dt is e.g. a program step time unit or "Task”) than that of the driver's request signal.
- a larger gradient e.g. +/- 20 Nm/dt (dt is e.g. a program step time unit or "Task"
- the torque of the primary motor is kept constant in the negative torque range with an increasing target four-wheel drive factor until the negative torque of the secondary motor has been increased to achieve the new target four-wheel drive factor.
- the invention is based on the following considerations: 4
- the invention is based on an internally tested control device for operating a road-coupled four-wheel drive vehicle with two electric drive motors, in which the driver's request signal is calculated in the form of a total driver's request (i.e. a total target torque, usually based on a filtered accelerator pedal actuation signal), which is calculated using a "fader" (i.e. a fade function when the target four-wheel drive factor changes) by setting the individual torques according to the target four-wheel drive factor on the two axles or on the electric drive motors of the two axles.
- ader i.e. a fade function when the target four-wheel drive factor changes
- the target torque of the primary motor on the primary axle e.g. finter axle
- a fader always works in the same time. Finally, the transition is based on torque. If the input torque is high, then high gradients arise during a crossfade with constant fader 5
- the four-wheel drive factor is changed in leaps and bounds (as it were “digitally” with values of 1 or 0) without a fader.
- This value therefore “digitally” factors the overall driver request (i.e. the total driver request as the total target torque based on the driver request signal, which is usually determined based on a filtered accelerator pedal actuation signal). This generates a value for the individual axles which, when there is a change in the all-wheel drive factor, leads to a change in the individual torques of the primary and/or secondary motor.
- the individual torques are continuously achieved via a "rate limiter" (gradient limitation module for executing a torque gradient limitation function).
- the rate limiter is defined by a driver's desired gradient-dependent characteristic. This characteristic curve is defined in such a way that the torque of the primary axle or the primary motor must not “run down” as the driver's request gradient increases; For this purpose, according to the invention, the secondary motor should “run up” and the primary motor should “stand still”. In addition, the torque of the primary axle or the primary motor must not “up” when the driver's request gradient decreases 6 run”; For this purpose, according to the invention, the secondary motor should “run down” and the primary motor should “stand still”.
- each axle may never take on more than the total load impact of the driver's request filtering; i.e. the gradient in the individual torque adjustment of the primary motor and/or the secondary motor must not generally be greater than the gradient of the driver's request.
- a shift in the direction of a higher gradient (of, for example, +/- 20RadNm/task) is only permitted in the area of constant driving (constant driver request gradient).
- This control unit contains a dynamic function module such that when recognizing a defined dynamic driving style of the driver based on the driver's request gradient during a (single-axle) mode of operation with the primary motor activated and the secondary motor deactivated for a predefined time window, a total setpoint predefined by the new driver's request Torque curve is determined. This is set according to a likewise specified axis distribution factor by reducing the target torque of the primary motor and by activating and increasing the target torque of the secondary motor, even if the specified total target torque curve is below a maximum possible torque of the primary motor.
- a defined dynamic driving style of the driver is preferably recognized based on the driver's request gradient when the current driver's request gradient exceeds a predetermined threshold value.
- the axle that is preferably driven in single-axle operation is referred to as the primary axle.
- the total target torque is divided by the two using a predetermined axis distribution factor 8th
- the target torque of the primary engine is reduced and the target torque of the secondary engine is increased.
- FIG. 1 shows a schematic representation of a road-coupled electric four-wheel drive vehicle according to the invention with the components essential for the torque-limiting function according to the invention
- FIG. 3 shows a diagram of a possible solution according to the invention to the problem shown in FIG. 2 without “fader” and
- Fig. 1 is a so-called road-coupled four-wheel drive vehicle with a first electric motor 1 as the primary motor, which acts as a drive motor, for example on the rear axle PA as the primary axle in single-axle operation, and with a second electric motor 2 as a secondary motor, which acts as a drive motor on the front axle SA as a Secondary axis acts in two-axis operation, 9 shown.
- the electric motors 1 and 2 are also referred to as electric machines or electric machines.
- the primary motor 1 can have its own mechatronically connected sub-control unit 4 and the secondary motor 2 can have its own mechatronically connected sub-control unit 5 . Both sub-control units 4 and 5 are connected to a central electronic control unit 3 .
- a method for controlling the operation of the electric four-wheel drive vehicle is carried out by the central electronic control unit 3, which has a corresponding programmable function module 6 and connections to the required sensors, actuators and/or to the optional sub-control units 4 and 5.
- the control unit 3 contains a gradient limitation functional module 6, for example in the form of a software program (computer program product), the design and functioning of which is discussed in more detail in the description of FIGS.
- FIG. 2 shows—also representative of FIG. 3—a diagram in which the time t is plotted on the x-axis and the moment M (torque) is plotted on the y-axis.
- the thin solid line shows an example of a possible course of the driver's desired signal in the form of a filtered total setpoint torque M_FP_int.
- a driver request signal FPJnt is recorded in the form of a fast "Tipln" with maximum “punch” - ie a dynamic overall signal given by the driver's request via the accelerator pedal FP. 10
- Target torque increase with high gradient.
- a dynamic driver's request (Tipln situation) is recognized by the steep gradient of the cumulative setpoint torque M_FP_int.
- Such a defined dynamic driver request should preferably be implemented in single-axle operation, ie with an AWD all-wheel drive factor of 100%, solely by the torque M_soll_1 of the primary motor 1 .
- a comparatively slow “TipOut” follows at time t2 and a comparatively slow “Tipln” at time t2.
- a fade function F takes place during a transition from single-axle operation to two-axle operation with a predefined all-wheel drive factor AWD of 50%.
- the gradient of the torque M_soll_1 of the primary motor 1 in area B1 would be steeper than the gradient of the driver's wish signal with an increasing all-wheel drive factor AWD with fade function F and with an increasing total target torque M_FP_int ("cumulative driver request") due to the increasing driver request signal FPJnt.
- the gradient of the torque M_soll_1 of the primary motor 1 in the area B2 would be steeper than the gradient of the driver's wish signal with a decreasing all-wheel drive factor AWD with fade function F and with a decreasing total target torque M_FP_int (“sum driver request”) due to the falling driver request signal FPJnt.
- the gradient of the torque M_soll_1 of the primary motor 1 in the area B3 would be in the opposite direction to the gradient or to the course of the driver's wish signal with an increasing all-wheel drive factor AWD with fade function F and with an increasing total target torque M_FPJnt ("sum driver's request”) in the negative torque.
- Fade functions F in the areas B1, B2 and B3 are different or undefined in length and therefore possibly irritating for the driver.
- a torque gradient limitation function can be carried out in the following manner by appropriate configuration or programming of the gradient limitation module 6 according to the invention:
- target all-wheel drive factor AWD changes due to a defined driver request signal FPJnt or cumulative driver request M_FP_int - e.g.
- the new target four-wheel drive factor AWD is suddenly specified (without fader F).
- the gradient of the driver's request signal FPJnt or the cumulative driver's request M_FP_int forms the gradient limit for the maximum permissible adjustment of the torque M_soll_1 of primary motor 1. Jumps for unlimited individual torques, as with M_soll_1_roh for primary motor 1 and shown with M_soll_2_roh for the secondary motor 2 should be prevented.
- Torque M_soll_1 of primary motor 1 is controlled in such a way that the direction of the gradient for adjusting torque M_soll_1 of primary motor 1 as part of a change in target all-wheel drive factor AWD does not run in the opposite direction to the direction of the gradient of driver request signal FPJnt or cumulative driver request M_FP_int.
- the torque M_soll_1 of the primary motor 1 and/or the torque M_soll_2 of the secondary motor 2 can be adjusted with a greater gradient than that of the driver request signal FPJnt.
- the torque M_soll_1 of the primary motor 1 is kept constant as the target all-wheel drive factor AWD increases until the negative torque of the secondary motor 2 has been increased to achieve the new target all-wheel drive factor AWD.
- the mode of operation of the module 6 is once again explained mathematically with reference to FIG.
- the target four-wheel drive factor is referred to as the "AWD factor", the torque of the primary motor as the “Pri axis” and the torque of the secondary motor as the “Sec axis”:
- Pri axis may run downwards with -20 RadNm/task, Sec axis correspondingly with +20 RadNm/task upwards until the distribution according to the AWD factor has been reached.
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Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR1020237026356A KR20230128350A (ko) | 2021-05-12 | 2022-04-08 | 도로 결합형 사륜 구동 차량을 작동하기 위한 제어장치 |
US18/282,576 US20240166059A1 (en) | 2021-05-12 | 2022-04-08 | Control Device for Operating a Road-Coupled All-Wheel Drive Vehicle |
CN202280014309.9A CN116940478A (zh) | 2021-05-12 | 2022-04-08 | 用于运行道路耦联式全轮驱动车辆的控制装置 |
JP2023563000A JP2024518881A (ja) | 2021-05-12 | 2022-04-08 | 車道連結型の全輪駆動車を動作させるための制御装置 |
Applications Claiming Priority (2)
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DE102021112443.3 | 2021-05-12 | ||
DE102021112443.3A DE102021112443A1 (de) | 2021-05-12 | 2021-05-12 | Steuervorrichtung zum Betrieb eines straßengekoppelten Allradfahrzeuges |
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WO2022238059A1 true WO2022238059A1 (de) | 2022-11-17 |
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PCT/EP2022/059348 WO2022238059A1 (de) | 2021-05-12 | 2022-04-08 | STEUERVORRICHTUNG ZUM BETRIEB EINES STRAßENGEKOPPELTEN ALLRADFAHRZEUGES |
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US (1) | US20240166059A1 (de) |
JP (1) | JP2024518881A (de) |
KR (1) | KR20230128350A (de) |
CN (1) | CN116940478A (de) |
DE (1) | DE102021112443A1 (de) |
WO (1) | WO2022238059A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040070270A1 (en) * | 2002-10-15 | 2004-04-15 | Nissan Motor Co., Ltd. | Vehicle control apparatus |
DE102014200427A1 (de) | 2014-01-13 | 2015-07-16 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren und Steuervorrichtung zum Betrieb eines straßengekoppelten Hybridfahrzeuges |
US20180312081A1 (en) * | 2015-11-25 | 2018-11-01 | Jaguar Land Rover Limited | Controller for a motor vehicle and method |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102004044507A1 (de) | 2004-09-15 | 2006-03-30 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Fahrzeug-Antriebs und Vorrichtung zur Durchführung des Verfahrens |
DE102007023164A1 (de) | 2007-05-16 | 2008-11-20 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Hybridantriebs eines Fahrzeugs |
DE102007042350A1 (de) | 2007-09-06 | 2009-03-12 | Robert Bosch Gmbh | Verfahren zur dynamischen Momentenkoordination von Aggregaten eines Hybridantriebs eines Fahrzeugs und entsprechende Vorrichtung |
DE102011056600A1 (de) | 2011-12-19 | 2013-06-20 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Antriebssystem für ein Kraftfahrzeug sowie Verfahren zum Betrieb eines derartigen Antriebssystems |
DE102021105341A1 (de) | 2021-03-05 | 2022-09-08 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren und Steuervorrichtung zum Betrieb eines straßengekoppelten Allradfahrzeuges |
-
2021
- 2021-05-12 DE DE102021112443.3A patent/DE102021112443A1/de active Pending
-
2022
- 2022-04-08 KR KR1020237026356A patent/KR20230128350A/ko unknown
- 2022-04-08 JP JP2023563000A patent/JP2024518881A/ja active Pending
- 2022-04-08 WO PCT/EP2022/059348 patent/WO2022238059A1/de active Application Filing
- 2022-04-08 US US18/282,576 patent/US20240166059A1/en active Pending
- 2022-04-08 CN CN202280014309.9A patent/CN116940478A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040070270A1 (en) * | 2002-10-15 | 2004-04-15 | Nissan Motor Co., Ltd. | Vehicle control apparatus |
DE102014200427A1 (de) | 2014-01-13 | 2015-07-16 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren und Steuervorrichtung zum Betrieb eines straßengekoppelten Hybridfahrzeuges |
US20180312081A1 (en) * | 2015-11-25 | 2018-11-01 | Jaguar Land Rover Limited | Controller for a motor vehicle and method |
Also Published As
Publication number | Publication date |
---|---|
CN116940478A (zh) | 2023-10-24 |
JP2024518881A (ja) | 2024-05-08 |
KR20230128350A (ko) | 2023-09-04 |
DE102021112443A1 (de) | 2022-11-17 |
US20240166059A1 (en) | 2024-05-23 |
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