WO2022253527A1 - Bremseinrichtung für ein fahrzeug und verfahren zum betreiben einer bremseinrichtung für ein fahrzeug - Google Patents
Bremseinrichtung für ein fahrzeug und verfahren zum betreiben einer bremseinrichtung für ein fahrzeug Download PDFInfo
- Publication number
- WO2022253527A1 WO2022253527A1 PCT/EP2022/062565 EP2022062565W WO2022253527A1 WO 2022253527 A1 WO2022253527 A1 WO 2022253527A1 EP 2022062565 W EP2022062565 W EP 2022062565W WO 2022253527 A1 WO2022253527 A1 WO 2022253527A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- braking torque
- vehicle
- brake actuator
- actuator device
- braking
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 26
- 230000004913 activation Effects 0.000 claims description 8
- 230000015556 catabolic process Effects 0.000 description 12
- 238000006731 degradation reaction Methods 0.000 description 12
- 230000001172 regenerating effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/741—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on an ultimate actuator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/10—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels by utilising wheel movement for accumulating energy, e.g. driving air compressors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/172—Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/406—Test-mode; Self-diagnosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/60—Regenerative braking
- B60T2270/604—Merging friction therewith; Adjusting their repartition
Definitions
- the present invention relates to a braking device for a vehicle and a method for operating a braking device for a vehicle.
- Customary drive concepts in electrically operated vehicles can fall back on a braking effect of the electric machine.
- Braking force generators or boosters that can be controlled electronically when braking operation is required are known for this purpose. It may be possible that in special situations, such as increased temperature or increased or reduced voltage, these devices can be degraded. The degradation can be a restriction of the operability.
- a brake actuator In its operating states, a brake actuator can either be fully functional, degraded with a certain and specified minimum operation, or be completely switched off.
- the present invention provides a braking device for a vehicle according to claim 1 and a method of operating a braking device for a vehicle according to claim 5.
- the idea on which the present invention is based is to specify a braking device for a vehicle and a method for operating a braking device for a vehicle, with the availability of a brake actuator device being able to be increased.
- the operating state of the brake actuator device can be better taken into account and a regenerative braking torque can be used and operation of the brake device can be adapted in such a way that the service life of the brake actuator device can be extended.
- a current capability of an electrical machine as a generator to be taken into account under its operability. This can be taken into account when selecting the degradation of the operation of the brake actuator device.
- the wording "degradation” here can refer to any recognizable type of throttling or reduction in the operation or functionality of the brake actuator device and/or other components in the vehicle.
- a deceleration portion (portion of braking torque) that the generator contributes can be taken into account and the brake actuator can also be degraded.
- the braking device for a vehicle with which a braking action of the vehicle can be controlled, comprises a brake actuator device; a control device which is connected to the brake actuator device and/or is included in it, wherein the control device can also be connected to an electric machine of the vehicle and is set up to indicate an operating state of the electric machine in generator mode and one of the to determine the second braking torque that can be generated by the electric machine and to operate the brake actuator device as a function of the operating state of the electric machine in generator mode, with at least one predefined total braking torque being able to be generated on the vehicle as the sum of the second braking torque of the electric machine and a first braking torque of the brake actuator device, and the control device also is set up to determine and vary at least one operating parameter for operation of the brake actuator device in order to thereby reduce or increase the generated first braking torque of the brake actuator device in order to maintain a predefined value range of the operating parameter and/or in order to, together with the second braking torque, at least provide predetermined total braking torque
- the braking action may be braking on the vehicle to slow rotation of wheels, for example with friction braking torque and/or regenerative braking torque and/or any other type of braking force on the vehicle.
- the brake actuator device can be a friction brake of any type, or any other type of conventional or other non-generator brake.
- the operating state of the electrical machine as a generator can be determined, which can correspond to a degree of the extent to which the electrical machine can apply a regenerative braking torque at the moment or in general, for example for a specified speed range, at a specific mileage, at a specific temperature, with an estimable available battery charge/power as well as other operation-specific parameters for an electric vehicle.
- the first braking torque can then be increased and/or reduced, for example adaptively and dynamically over time, by a specification to a minimum braking torque, such as which can always be called up for the vehicle, and which can be a sum of the first and second braking torque or one of these individually, at least to some extent.
- An operating parameter to be determined and varied for this purpose for operation of the brake actuator device can be any type of parameter that can be relevant for this respective brake actuator device for its mode of operation. In order to at least partially achieve a specification of a braking effect, this operating parameter or several of them can then be assigned a respective corresponding value range or value, which can be necessary to achieve the specification with approximately a certain tolerance.
- the consideration of the generator capabilities for the degradation of a brake actuator can be used.
- it can be estimated what proportion of the specification for the total braking torque on the vehicle can be provided by the generator, always or in a current (to be estimated) situation, and to what proportion the first braking torque can then be reduced.
- Such a reduction in the first braking torque can then result in one or more operating parameters of the brake actuator device being able to be varied, for example in order to reduce the first braking torque and to reduce an operating load on the brake actuator device.
- This can advantageously be done in such a way that a specification for the total braking torque can still be met, at least to some extent.
- This specification can be specified as a standard, by a manufacturer and/or by a current user of the vehicle. It can be used with all brake actuators that can actively degrade.
- the available generator capability can be limited by various parameters. This is, for example, the charge level of the battery or the speed of the vehicle. Because of this, the degradation must be continuously adjusted to match the generator's current ability, taking into account the generator's ability. For example, a so-called “Service Brake Performance” can be specified, ie a deceleration of 6.43 m/s 2 with 500 N pedal force. The more you can degrade, the more availability increases.
- the brake actuator By taking the generator component into account in this way, a requirement for the minimum operating mode of the brake actuator can be reduced. In this case, it may be necessary for the brake actuator to know the current capability of the generator. If the brake actuator is not responsible for controlling the generator and a control device is not directly assigned to it or is not present in it, the generator capability can be communicated to the brake actuator, for example via an existing communication network (CAN, FlexRay). If the "Service Brake Performance" specification is used as minimum operation, the brake actuator can, for example, with generator capability, decelerate from 3 m/s 2 instead of 6.43 m/s 2 to 3.43 m/s 2 (at 500 N pedal force) are degraded.
- CAN existing communication network
- the vehicle can be a passenger car with a drive that can include an electric machine.
- the brake actuator device includes a brake booster device and/or a brake system.
- the braking system may include a friction brake or any other type of non-regenerative brake.
- the control device can be connected to an on-board network of a vehicle and is set up to determine an on-board network voltage and to compare it with a default value and to reduce the first braking torque, with an activation voltage and/or an activation current of the brake actuator device in the vehicle being reduced to reduce the first braking torque when the vehicle electrical system voltage falls below a first threshold value. If the voltage falls below a first threshold value, the current consumption of the brake actuator can be limited. This prevents even further voltage degradation caused by the current flow. If the voltage continues to fall below a second threshold value, the brake actuator can be switched off completely.
- the default value can correspond to the full voltage for an operating mode of the vehicle electrical system or to a minimum value, for example 12 V or 6 V or to the first or second threshold value.
- the first and/or second threshold value can serve as the default value.
- the first threshold value can be 6 volts, for example, it being possible for the first braking torque to be reduced to a predetermined magnitude if a specification for the total braking torque can nevertheless be achieved.
- the control voltage and/or the control current of a brake actuator device can be the variables with which the first braking torque is generated. If such a voltage or current is used to a lesser extent, the current or the voltage for the vehicle electrical system can then be loaded to a lesser extent. As a result, the necessary (to be provided) operating current for the operation of the brake actuator can be reduced. This reduces the on-board network load caused by a degraded brake actuator.
- a second threshold value can also be selected to be even lower, since the required power consumption can be lower in the degraded state. The operating range increases here up to lower voltages.
- the brake actuator device includes a temperature sensor by which an operating temperature of the brake actuator device can be determined, wherein the control device is connected to the temperature sensor and is set up to compare the operating temperature with a default value for the temperature and to activate the brake actuator device as a function of the to operate at operating temperature. If the temperature sensor detects an excess temperature, the degradation can prevent further heating (+ the brake actuator possibly being switched off if a switch-off temperature is exceeded) of the brake actuator.
- the default value for the temperature can then be a defined temperature that is still tolerable, or it can already correspond to a switch-off temperature.
- the brake actuator device can then be regulated, for example the first braking torque being able to be reduced if the default value for the temperature and/or a tolerance range is exceeded.
- Reducing the minimum power can reduce the temperature stress at the time of degradation. As a result, the usable temperature range can be increased without degradation. As an alternative or in addition, the operability can increase up to continuous operability in the degraded area.
- the minimum output determines how much the power consumption of the device can be restricted.
- the power consumption can be responsible for an increase in temperature. If you degrade to a lower power consumption, the temperature increase in the degraded state is also reduced. For example, if there is a specific (final) switch-off threshold and if the aim of the design is to reach this threshold only after a certain time, the device can switch to a degraded state at an earlier threshold. With the current being lower in the degraded state as a result of the invention, the temperature increase in the degraded state can also be slower, so the degradation threshold can be selected to be higher.
- a need to carry out a braking action with the braking device according to the invention is recognized; a determination of an operating state of the electric machine and from this a producible second braking torque on the electric machine in generator mode and comparing this producible second braking torque with a predetermined total braking torque on a vehicle; generating a first braking torque by the brake actuator device and the second braking torque by the electric machine together as a total braking torque on the vehicle, with an operating parameter being adapted for operation of the brake actuator device and thereby reducing or increasing the first braking torque of the brake actuator device in order to do so together with the second Braking torque provide at least the predetermined total braking torque on the vehicle.
- the necessity can be recognized from a pedal actuation by the driver or by a sensor system on the vehicle, with the sensor system being able to record a command from the driver and/or the traffic conditions.
- the predefined total braking torque can be a braking torque that is at least to be achieved or a braking torque that is necessary for a current situation.
- At least one operating parameter for operation of the brake actuator device is determined and varied, thereby reducing the first braking torque of the brake actuator device in order to maintain a predefined value range of the operating parameter.
- a currently generable maximum second braking torque is determined and the first Braking torque reduced to the extent that the specified total braking torque is still achieved on the vehicle.
- a currently available second braking torque can be determined and/or a second braking torque available in the foreseeable future can also be estimated.
- a voltage and/or a current in an on-board network of the vehicle is determined and the first braking torque is reduced, with a control voltage and/or a control current of the brake actuator device in the vehicle being reduced in order to reduce the first braking torque.
- a general adjustment to the control voltage and/or the control current can take place.
- the voltage in the vehicle electrical system is determined and if the voltage in the vehicle electrical system falls below a first threshold value, the activation voltage and/or an activation current of the brake actuator device is limited and if the voltage in the vehicle electrical system falls below a second threshold value, the brake actuator device is then switched off be when the second braking torque reaches the predetermined total braking torque on the vehicle itself.
- an operating temperature of the brake actuator device is determined by a temperature sensor and the first braking torque is reduced when the operating temperature exceeds a predetermined value.
- the operating state of the electric machine and the second braking torque that can be generated therefrom on the electric machine are determined continuously or at predetermined time intervals.
- the braking device can also be characterized by the features mentioned in connection with the method and its advantages, and vice versa.
- FIG. 1 shows a schematic representation of a braking device for a vehicle according to an exemplary embodiment of the present invention
- FIG. 2 shows a schematic representation of a braking device according to an exemplary embodiment of the present invention in a vehicle
- FIG. 3 shows a block diagram of method steps of the method for operating a braking device for a vehicle according to an exemplary embodiment of the present invention.
- the same reference symbols denote the same elements or elements with the same function.
- FIG. 1 shows a schematic representation of a braking device for a vehicle according to an exemplary embodiment of the present invention.
- the braking device 10 for a vehicle F comprises a brake actuator device BA; a control device SE, which is connected to the brake actuator device BA and/or is included in it, wherein the control device SE can also be connected to an electric machine EM of the vehicle F, and is set up to indicate an operating state of the electric machine EM in generator mode and a to determine the second braking torque that can be generated by the electrical machine EM and to operate the brake actuator device BA in generator mode depending on the operating state of the electrical machine EM, with at least one predefined total braking torque on the vehicle F being the sum of the second braking torque of the electrical machine and a first braking torque of the brake actuator device BA can be generated and the control device SE is also set up to determine and vary at least one operating parameter for operation of the brake actuator device BA in order to thereby reduce the first braking torque generated by the brake actuator device BA or the like to increase in order to comply with a predefined value range of the operating parameter and/or to provide at least the predefined
- FIG. 2 shows a schematic representation of a braking device according to an exemplary embodiment of the present invention in a vehicle.
- FIG. 2 shows further components and mutual connections between the components, as these can be additionally or alternatively present in the embodiment of FIG. 1 .
- the braking device 10 can be designed in such a way that the control device SE can be connected to an on-board network BN of the vehicle and is set up to determine a vehicle electrical system voltage and to compare it with a default value and to reduce the first braking torque, with an activation voltage and/or an activation current of a brake actuator device BA in the vehicle being reduced in order to reduce the first braking torque if the vehicle electrical system voltage falls below a first threshold value sinks.
- the brake actuator device BA can include a temperature sensor TS and/or the control device SE can be connected to the temperature sensor TS, by means of which an operating temperature of the brake actuator device BA can be determined, with the control device SE being set up to compare the operating temperature with a default value for the temperature and to operate the brake actuator device as a function of the operating temperature.
- the brake actuator device BA can include a pedal sensor PS and/or the control device SE can be connected to the pedal sensor PS, through which braking request can be identified.
- FIG. 3 shows a block diagram of method steps of the method for operating a braking device for a vehicle according to an exemplary embodiment of the present invention.
- a need to perform a braking action with the braking device according to the invention is recognized S1; determining S2 an operating state of the electrical machine and from this a second braking torque that can be generated at the electrical machine in generator mode and comparing this second braking torque that can be generated with a predefined total braking torque at a vehicle; generation S3 of a first braking torque by the brake actuator device and the second braking torque by the electric machine together as a total braking torque on the vehicle, with an operating parameter being adapted for operation of the brake actuator device and the first braking torque of the brake actuator device thereby being reduced or increased in order to, together with the second braking torque to provide at least the predetermined total braking torque on the vehicle.
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Regulating Braking Force (AREA)
- Braking Systems And Boosters (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023572692A JP2024520405A (ja) | 2021-06-01 | 2022-05-10 | 車両用ブレーキ装置および車両用ブレーキ装置の作動方法 |
CN202280039835.0A CN117412887A (zh) | 2021-06-01 | 2022-05-10 | 用于车辆的制动装置和用于运行车辆的制动装置的方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021205578.8 | 2021-06-01 | ||
DE102021205578.8A DE102021205578A1 (de) | 2021-06-01 | 2021-06-01 | Bremseinrichtung für ein Fahrzeug und Verfahren zum Betreiben einer Bremseinrichtung für ein Fahrzeug |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022253527A1 true WO2022253527A1 (de) | 2022-12-08 |
Family
ID=81975244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/062565 WO2022253527A1 (de) | 2021-06-01 | 2022-05-10 | Bremseinrichtung für ein fahrzeug und verfahren zum betreiben einer bremseinrichtung für ein fahrzeug |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP2024520405A (de) |
CN (1) | CN117412887A (de) |
DE (1) | DE102021205578A1 (de) |
WO (1) | WO2022253527A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2733030A1 (de) * | 2011-07-11 | 2014-05-21 | Toyota Jidosha Kabushiki Kaisha | Bremssystem und stellgliedsteuerung |
DE102016201348A1 (de) | 2016-01-29 | 2017-08-03 | Volkswagen Aktiengesellschaft | Verfahren, Steuervorrichtung und Schaltersystem zum Bedienen eines Kriechmodus eines Kraftfahrzeugs |
US20190092174A1 (en) * | 2017-09-26 | 2019-03-28 | Mando Corporation | Electronic brake system |
DE102018209311A1 (de) * | 2018-06-12 | 2019-12-12 | Audi Ag | Verfahren zum Betrieb eines Kraftfahrzeugs sowie Kraftfahrzeug |
US10723229B1 (en) * | 2019-03-15 | 2020-07-28 | Ford Global Technologies, Llc | Regenerative braking control system |
-
2021
- 2021-06-01 DE DE102021205578.8A patent/DE102021205578A1/de active Pending
-
2022
- 2022-05-10 WO PCT/EP2022/062565 patent/WO2022253527A1/de active Application Filing
- 2022-05-10 CN CN202280039835.0A patent/CN117412887A/zh active Pending
- 2022-05-10 JP JP2023572692A patent/JP2024520405A/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2733030A1 (de) * | 2011-07-11 | 2014-05-21 | Toyota Jidosha Kabushiki Kaisha | Bremssystem und stellgliedsteuerung |
DE102016201348A1 (de) | 2016-01-29 | 2017-08-03 | Volkswagen Aktiengesellschaft | Verfahren, Steuervorrichtung und Schaltersystem zum Bedienen eines Kriechmodus eines Kraftfahrzeugs |
US20190092174A1 (en) * | 2017-09-26 | 2019-03-28 | Mando Corporation | Electronic brake system |
DE102018209311A1 (de) * | 2018-06-12 | 2019-12-12 | Audi Ag | Verfahren zum Betrieb eines Kraftfahrzeugs sowie Kraftfahrzeug |
US10723229B1 (en) * | 2019-03-15 | 2020-07-28 | Ford Global Technologies, Llc | Regenerative braking control system |
Also Published As
Publication number | Publication date |
---|---|
CN117412887A (zh) | 2024-01-16 |
DE102021205578A1 (de) | 2022-12-01 |
JP2024520405A (ja) | 2024-05-24 |
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