EP4577435A1 - Verfahren zur betätigung eines bremssystems in einem fahrzeug - Google Patents
Verfahren zur betätigung eines bremssystems in einem fahrzeugInfo
- Publication number
- EP4577435A1 EP4577435A1 EP23742297.7A EP23742297A EP4577435A1 EP 4577435 A1 EP4577435 A1 EP 4577435A1 EP 23742297 A EP23742297 A EP 23742297A EP 4577435 A1 EP4577435 A1 EP 4577435A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- brake
- braking force
- electromechanical
- vehicle
- electromechanical braking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- B60T13/10—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 fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/665—Electrical control in fluid-pressure brake systems the systems being specially adapted for transferring two or more command signals, e.g. railway systems
- B60T13/667—Electrical control in fluid-pressure brake systems the systems being specially adapted for transferring two or more command signals, e.g. railway systems and combined with electro-magnetic brakes
-
- 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
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
- B60T8/92—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means automatically taking corrective action
-
- 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
-
- 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
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
- B60T8/885—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
Definitions
- the invention relates to a method for actuating a braking system in a vehicle, wherein the braking system comprises a hydraulic vehicle brake that is equipped with a brake force boosting unit and at least one electromechanical braking device with an electric brake motor for generating an electromechanical braking force.
- DE 10 2004004992 A1 describes a parking brake system in a vehicle in which a clamping force that fixes the vehicle when it is at a standstill is generated via an electric brake motor by the electric brake motor adjusting a brake piston against a brake disc.
- the parking brake system is integrated into the hydraulic vehicle brake. During regular braking operation, the brake piston is pressed against the brake disc by the hydraulic brake fluid.
- the invention also relates to a computer program product with a program code that is designed to carry out the method steps described above to carry out.
- the computer program product runs in the control device described above.
- FIG. 3 shows a flow chart with method steps for building up an additional electromechanical braking force in the event that a brake force boosting unit of the hydraulic vehicle brake has partially or completely failed
- the brake system shown in Fig. 1 in a vehicle comprises a hydraulic vehicle brake 1 with a front axle brake circuit 2 and a rear axle brake circuit 3 for supplying and controlling wheel brake devices 9 on each wheel of the vehicle with a brake fluid under hydraulic pressure.
- the two brake circuits 2, 3 are connected to a common master brake cylinder 4, which is supplied with brake fluid via a brake fluid reservoir 5.
- the master brake cylinder piston within the master brake cylinder 4 is actuated by the driver via the brake pedal 6, which is exerted by the driver Pedal travel is measured via a pedal travel sensor 7.
- a brake booster 10 which includes, for example, an electric motor, which preferably actuates the master brake cylinder 4 via a gearbox (iBooster).
- the brake booster 10 forms an electrically controllable actuator for influencing the brake pressure.
- the iBooster 10 forms a brake booster unit.
- the vehicle brake 1 is provided with an additional hydraulic supply line 24, which connects the brake fluid reservoir 5 to the outlet valves of wheel brake devices 9.
- the wheel brake device 9 which is arranged on a wheel on the rear axle of the vehicle, is shown in detail.
- the wheel brake device 9 is part of the hydraulic vehicle brake 1 and is supplied with brake fluid 22 from the rear axle brake circuit.
- the wheel brake device 9 also has an electromechanical braking device, which, like the hydraulic vehicle brake 1, is part of the braking system in the vehicle and is preferably used to immobilize the vehicle when it is at a standstill, but can also be used to brake when the vehicle is moving.
- the electromechanical braking device comprises a brake caliper 12 with pliers 19, which engages over a brake disc 20.
- the braking device has a direct current electric motor as a brake motor 13, the rotor shaft of which rotates a spindle 14 on which a spindle nut 15 is mounted.
- a brake motor 13 the rotor shaft of which rotates a spindle 14 on which a spindle nut 15 is mounted.
- the spindle nut 15 is adjusted axially.
- the spindle nut 15 moves within a brake piston 16, which is the carrier of a brake pad 17, which is pressed against the brake disc 20 by the brake piston 16.
- the brake piston 16 is sealed on its outside in a flow-tight manner relative to the receiving housing via an encompassing sealing ring 23.
- the spindle nut 15 can move axially forward towards the brake disc 20 when the spindle 14 rotates or, when the spindle 14 rotates in the opposite direction, it can move axially backwards until a stop 21 is reached.
- the spindle nut 15 acts on the inner end face of the brake piston 16, whereby the brake piston 16, which is axially displaceably mounted in the braking device, is pressed with the brake pad 17 against the facing end face of the brake disc 20.
- the hydraulic pressure of the brake fluid 22 from the hydraulic vehicle brake 1 acts on the brake piston 16.
- the hydraulic pressure can also have a supporting effect when the vehicle is at a standstill when the electromechanical braking device is actuated, so that the total braking force is made up of the proportion provided by the electric motor and the hydraulic part. While the vehicle is moving, either only the hydraulic vehicle brake is active or both the hydraulic vehicle brake and the electromechanical braking device or only the electromechanical braking device is active to generate braking force.
- the control signals for controlling both the adjustable components of the hydraulic vehicle brake 1 and the electromechanical wheel brake device 9 are generated in the control unit 11. Fig.
- FIG. 3 shows a flow chart with method steps for building up an additional electromechanical braking force in the event that a brake booster unit of a hydraulic vehicle brake has failed.
- Fig. 3 thus relates to a braking case with actuation of the hydraulic vehicle brake, but with a complete failure or at least a partial failure of a brake booster unit such as the iBooster 10 or a plunger.
- the braking force initiated by the driver by pressing the brake pedal is not or only insufficiently amplified, so that the driver has to press the brake pedal significantly harder in order to achieve the same deceleration values compared to the intact hydraulic vehicle brake.
- step 31 the query is made as to whether the hydraulic vehicle brake is being actuated, in particular by actuating the brake pedal. If this is not the case, the no branch (“N”) is followed by returning to the first method step 30 and checking again at cyclical intervals whether the brake pedal is being actuated. On the other hand, if the query in step 31 shows that the brake pedal is actually being pressed by the driver, the yes branch (“Y”) is followed by the next method step 32.
- step 31 as an alternative to actuating the brake pedal, it can also be queried whether a braking force request is made in some other way, in particular via an automatically operating driver assistance system.
- step 32 a query is made as to whether the hydraulic brake pressure exceeds a first, lower threshold value. If this is not the case, the No branch returns to the start of the procedure. However, if the current hydraulic brake pressure exceeds the lower threshold, a minimum requirement must be assumed that triggers the subsequent actions. In this case, the yes branch is followed by the next procedural step
- the reduction in the free travel can, if necessary, also take place below the lower limit value, which represents a minimum pressure. This has the advantage that as the braking requirement increases, dead times when switching on the electromechanical braking force are reduced.
- Fig. 4 shows the activation of the electromechanical braking device in method step 35 with a control loop for limiting the maximum electromechanical braking force generated.
- the next step 36 asks whether the wheel slip on the relevant vehicle wheel on which the electromechanical braking force is generated exceeds a threshold value. If this is the case, the yes branch is followed by an advance to step 37, according to which the electromechanical braking force is automatically reduced in the electromechanical braking device. The system then returns to step 36 and asks again at cyclic intervals whether the wheel slip on the wheel in question is exceeded.
- step 36 If, on the other hand, the query in step 36 shows that the wheel slip is still below the threshold value, the no branch is followed by an advance to step 38, in which a query is made as to whether the current braking request, i.e. the braking force requested by the driver, is greater than that electromechanical braking device - taking into account the hydraulic braking force - is provided. If this is the case, the yes branch is followed by returning to step 35 and the electromechanical braking device is set accordingly to implement the braking request. If, on the other hand, the braking request is below the current electromechanical braking force, the no branch can be followed to step 37 to reduce the electromechanical braking force. However, it is also possible to return to step 35.
- the current braking request i.e. the braking force requested by the driver
- the increase occurs in several stages, with the electromechanical braking force being kept constant or at least approximately constant during each stage.
- the minimum control time for changing to a higher or lower level is, for example, 50 ms.
- Several levels can be specified, for example three, four, five or even more levels, with the electromechanical braking force being increased step by step from level to level.
- the reduction of the electromechanical braking force can also be carried out in stages.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022208761.5A DE102022208761A1 (de) | 2022-08-24 | 2022-08-24 | Verfahren zur Betätigung eines Bremssystems in einem Fahrzeug |
| PCT/EP2023/069600 WO2024041807A1 (de) | 2022-08-24 | 2023-07-14 | Verfahren zur betätigung eines bremssystems in einem fahrzeug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4577435A1 true EP4577435A1 (de) | 2025-07-02 |
Family
ID=87378064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23742297.7A Pending EP4577435A1 (de) | 2022-08-24 | 2023-07-14 | Verfahren zur betätigung eines bremssystems in einem fahrzeug |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4577435A1 (de) |
| CN (1) | CN119768317A (de) |
| DE (1) | DE102022208761A1 (de) |
| WO (1) | WO2024041807A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004004992B4 (de) | 2004-01-30 | 2008-03-13 | Lucas Automotive Gmbh | Verfahren zum Betreiben der Bremsausrüstung eines Fahrzeugs |
| DE102015226838A1 (de) | 2015-12-30 | 2017-07-06 | Robert Bosch Gmbh | Verfahren zum Ansteuern einer Feststellbremse in einem Fahrzeug |
| DE102016208944A1 (de) * | 2016-05-24 | 2017-11-30 | Robert Bosch Gmbh | Verfahren zum Abbremsen eines Fahrzeugs mit hydraulischer Fahrzeugbremse und elektromechanischer Bremsvorrichtung |
| DE102017208058A1 (de) | 2017-05-12 | 2018-11-15 | Robert Bosch Gmbh | Verfahren zum Abbremsen eines Fahrzeugs mit hydraulischer Fahrzeugbremse und elektromechanischer Bremsvorrichtung |
| DE102018208877A1 (de) | 2018-06-06 | 2019-12-12 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Bremssystems eines Kraftfahrzeugs, sowie Steuergerät und Bremssystem |
| DE102018210021A1 (de) * | 2018-06-20 | 2019-12-24 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Bremssystems eines Kraftfahrzeugs, sowie Steuergerät und Bremssystem |
| DE102019123343A1 (de) * | 2019-08-30 | 2021-03-04 | Ipgate Ag | Bremsvorrichtung, insbesondere für elektrisch angetriebene Kraftfahrzeuge |
| CN110920590B (zh) * | 2019-12-12 | 2021-01-05 | 苏州萨克汽车科技有限公司 | 行车辅助方法、行车辅助装置和电子驻车系统 |
-
2022
- 2022-08-24 DE DE102022208761.5A patent/DE102022208761A1/de active Pending
-
2023
- 2023-07-14 WO PCT/EP2023/069600 patent/WO2024041807A1/de not_active Ceased
- 2023-07-14 EP EP23742297.7A patent/EP4577435A1/de active Pending
- 2023-07-14 CN CN202380061471.0A patent/CN119768317A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024041807A1 (de) | 2024-02-29 |
| CN119768317A (zh) | 2025-04-04 |
| DE102022208761A1 (de) | 2024-02-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3297877B1 (de) | Verfahren zum bereitstellen einer bremskraft in einem fahrzeug | |
| EP2934973B1 (de) | Elektrohydraulische fahrzeug-bremsanlage und verfahren zum betreiben derselben | |
| DE102013209353B4 (de) | Verfahren zum Einstellen des Lüftspiels einer hydraulischen Fahrzeugbremse | |
| EP2996912B1 (de) | Steuervorrichtung für ein bremskraftverstärktes autonomes bremssystem eines fahrzeugs und verfahren zum betreiben eines bremskraftverstärkten autonomen bremssystems eines fahrzeugs | |
| DE102016208944A1 (de) | Verfahren zum Abbremsen eines Fahrzeugs mit hydraulischer Fahrzeugbremse und elektromechanischer Bremsvorrichtung | |
| DE102015208165A1 (de) | Bremsvorrichtung für ein Kraftfahrzeug und Verfahren zur Ansteuerung der Bremsvorrichtung bei einer Überlagerung verschiedener Kraftkomponenten | |
| DE102015211461A1 (de) | Verfahren zum Überprüfen der Bremskraft in einem Fahrzeug | |
| DE102018208877A1 (de) | Verfahren zum Betreiben eines Bremssystems eines Kraftfahrzeugs, sowie Steuergerät und Bremssystem | |
| WO2008138668A1 (de) | Automatische feststellbremse mit schlupfregler | |
| DE102015226838A1 (de) | Verfahren zum Ansteuern einer Feststellbremse in einem Fahrzeug | |
| DE102019200955A1 (de) | Verfahren zur Aktivierung und Deaktivierung eines Steuergeräts | |
| DE102018217808A1 (de) | Verfahren zum Verzögern eines Kraftfahrzeugs bei einer Notbremsung und Kraftfahrzeug | |
| EP0952060B1 (de) | Verfahren und Vorrichtung zum Einstellen bzw. Ändern des Lüftspiels zwischen Bremsbelägen und Reibflächen von Fahrzeugbremsen | |
| EP3947064A1 (de) | Verfahren zum verzögern eines kraftfahrzeugs bei einer notbremsung mit einem elektromotor eines elektroantriebs des kraftfahrzeugs und einem bremsmoment einer betriebsbremsanlage des kraftfahrzeugs, sowie kraftfahrzeug | |
| DE102017219379A1 (de) | Verfahren zum selbsttätigen Abbremsen eines Fahrzeugs | |
| EP4003796B1 (de) | Verfahren zum ansteuern eines hydraulischen bremssystems in einem fahrzeug | |
| DE102016205990A1 (de) | Verfahren zum Einstellen der Bremspedalgegenkraft in einem Fahrzeug | |
| EP1690765B1 (de) | Verfahren und Vorrichtung zur Steuerung einer Bremsanlage | |
| DE102017208058A1 (de) | Verfahren zum Abbremsen eines Fahrzeugs mit hydraulischer Fahrzeugbremse und elektromechanischer Bremsvorrichtung | |
| WO2019242987A1 (de) | Verfahren zum ansteuern einer elektromechanischen bremsvorrichtung in einem fahrzeug | |
| EP3436321B1 (de) | Verfahren zum bereitstellen einer bremskraft in einem fahrzeug | |
| EP4577435A1 (de) | Verfahren zur betätigung eines bremssystems in einem fahrzeug | |
| WO2017021061A1 (de) | Verfahren zum überprüfen der parkbremskraft in einem fahrzeug | |
| DE102022213114A1 (de) | Verfahren und Vorrichtung zur Betätigung eines Bremssystems | |
| DE102022211949A1 (de) | Verfahren zum Betreiben eines Bremssystems und Steuervorrichtung zum Ausführen des Verfahrens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20250324 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20260330 |