EP3010771A1 - Procédé pour le freinage d'un véhicule automobile - Google Patents

Procédé pour le freinage d'un véhicule automobile

Info

Publication number
EP3010771A1
EP3010771A1 EP14726556.5A EP14726556A EP3010771A1 EP 3010771 A1 EP3010771 A1 EP 3010771A1 EP 14726556 A EP14726556 A EP 14726556A EP 3010771 A1 EP3010771 A1 EP 3010771A1
Authority
EP
European Patent Office
Prior art keywords
brake
wheel
control device
motor vehicle
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.)
Withdrawn
Application number
EP14726556.5A
Other languages
German (de)
English (en)
Inventor
Georg Eichner
Siegfried Koelbel
Georg Kohl
Peter Langen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP3010771A1 publication Critical patent/EP3010771A1/fr
Withdrawn legal-status Critical Current

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
    • 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
    • B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
    • B60T8/1766—Proportioning of brake forces according to vehicle axle loads, e.g. front to rear of vehicle
    • 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
    • B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
    • 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
    • B60T2270/82—Brake-by-Wire, EHB

Definitions

  • the invention relates to a method for braking a motor vehicle according to the preamble of the claim.
  • tribological system excites vibrations emitted by a resonant surface as a sound.
  • Brake squeal usually occurs in certain brake pressure ranges, that is, not over the entire deployable brake pressure range.
  • the brake pressure depends, among other things, on the brake force distribution at the front and rear.
  • DE 198 04 676 A1 describes a method for avoiding squeaking noises on brake discs, being remedied with a pressure control unit for acting on the wheel brakes or for adapting their brake pads.
  • the squeaking of the brake discs is to be detected metrologically and eliminated by modulating the contact pressure of the brake pads on one or more wheel brakes.
  • the metrological detection can be done by vibration, microphones or by pressure transducer.
  • WO 201 1/069716 A1 describes a braking method in which, on the one hand, there is no longer any mechanical coupling between the brake pedal and the brake actuator and, on the other hand, brake squeal is also prevented at the same time.
  • the braking force acting on the brake should be automatically varied, especially in a phase in which a substantially constant braking force is required by the driver or a brake assist system, thereby preventing squeaking.
  • the dynamics or amplitude of the automatic braking force modulation can be specified depending on the braking situation.
  • the aforementioned modulation of the braking force can be triggered by a predetermined trigger signal, such as a specific noise or a mechanical vibration.
  • a predetermined trigger signal such as a specific noise or a mechanical vibration.
  • an acoustic sensor can be provided.
  • DE 103 12 545 B4 describes a method for operating a brake system, wherein a brake pressure value is determined and checked for belonging to a reference range and depending on the result of this review, the means for controlling the brake pressure are controlled so that the determined brake pressure value below Avoiding the reference range is distributed to at least one front brake / rear brake.
  • DE 102 005 056 986 A1 likewise describes a method for preventing brake squeal.
  • the total braking torque at least in a certain range of braking pressures in which brake squeaking occurs, is distributed to the wheels of the front and rear axles via a brake force control device.
  • the object of the invention is to provide a method for braking a motor vehicle designed as a friction brakes wheel brakes without hydraulic pressure connection to a brake actuator, with the cost of other functions can be met, which are triggered by a reason.
  • a method for braking a motor vehicle with wheel brakes without hydraulic pressure connection to a brake actuator is used, for a service brake device with a brake actuator, which finally triggered by means of a control device, from an output of the brake actuator, the wheel brakes due to at least one occasion , radically or axially selectively acted upon, that at least on a wheel or at least on an axis, the braking force changes, the method being characterized in that a motor vehicle retarding Automatssollbremskraft is distributed by the control device via the brake actuator on the individual wheels or axles ,
  • the predetermined by the controller total Sollbremskraft by this or the brake actuator due to the occasion are divided differently on the individual wheels or axles.
  • this distribution also includes a wheel- or axle-selective change in the frequency and / or the average and the associated amplitudes of the braking force at Applying stutter braking on one or more wheels by the brake actuator, as it is already known in the prior art. If such a stutter braking is applied and varied, this is perceivable to the vehicle occupants or the driver haptically or acoustically perceptible, which often significantly affects the ride comfort.
  • a preferred embodiment of the invention to control the brake actuator by the controller so that although rad- or axle-selective different braking force modulation with different frequencies and / or braking force averages and / or amplitudes are applied to the wheel brakes, but in such a way that the the
  • Motor vehicle is perceived as continuous and acoustically imperceptible. This also applies to brake squeal, which is suppressed by braking force modulation and / or frequency variation, by means of the methods already disclosed in the prior art, by the wheel or axle-selective actuation of the brake actuator via the control device and thus is not acoustically perceptible.
  • a brake squeaking noise is already recognized at the beginning of its occurrence and prevented by measures described above. for example, by wheel or axle-selective brake pressure control via the brake actuator controlled by the control unit.
  • a partial braking force are shifted by the control unit and brake actuator to the other vehicle axle and thus the squeaking noise can be prevented by reducing the brake pressure on squeaking wheel.
  • This can be controlled within such narrow limits that no squeaking is audible to the vehicle occupants.
  • such measures to avoid brake squeal can also be used in the regulated brake application range, even if no brake pedal is actuated.
  • the control unit is self-learning and thus can permanently prevent brake squeal after it has been detected once by means of the sensor.
  • the control unit automatically detects and automatically stores the boundary conditions that are relevant to brake squeal, such as outside temperature, humidity, speed, direction of travel, brake disc temperatures, steering angle and wetness. Calculable values can also be determined by the Control unit or other computing devices are calculated, such as the brake disc temperatures via a brake disc temperature program. If squeaking occurs, this is detected by the sensor and the values of the boundary conditions are stored.
  • the brake pressure is modulated by the control unit and the brake actuator in response to the driver's desired braking torque at the four wheels depending on the driving situation.
  • boundary conditions of situations in which brakes are known to squeal may be stored via a map. Another way to
  • Squeak detection is provided by the wheel speed sensor technology of the ABS sensor or an accelerometer on the steering knuckle or wheel instead of a microphone. If a brake squeal critical range is reached, the relevant
  • Brake pressure range if still comfortable possible, automatically hidden, i. it is controlled by the controller lower or higher brake pressures.
  • Delay occurs. Noise in the application area of the brake pads can be reduced, in which this pressure range passes quickly or is completely avoided. For example, only brake pressures greater than 3 bar can be output by the control unit. In order to achieve a harmonious response, it is also possible to first brake only one of the two axles and then to slow down the second axle at a further desired increase in brake pressure. As a result, noises can be avoided altogether.
  • an on-board analysis takes place as to whether brakes squeak forward or rearward. When brake squeal occurs, the controller changes the pressure for each brake, one at a time, up or down over the brake actuator until the squealing noise changes or stops.
  • the controller it is recognized by the controller that the vehicle has been exposed to adverse weather conditions and downtime for a long time. Usually occur after longer periods, especially in wet conditions, air freshening phenomena on the brake disc surfaces, which significantly increase the brake noise inclination.
  • the control unit then initiates automatic polishing braking while driving, for example, only at individual wheel brakes, not by the occupants
  • brake noise and the corresponding boundary conditions are sensed via the microphone and subsequently recorded in the control unit.
  • the data can then be made available for customer service, ie a workshop For example, at customer service, it is qualified to read the frequency and volume of brake squeal from a fault memory.
  • dry brakes are performed.
  • the wheel brakes are controlled one by one or one by one.
  • the dry braking for an occupant is imperceptible even at higher pressure levels, due to the reduced number of wheel brakes, which are driven sequentially.
  • vibrations or noises on the motor vehicle can also be prevented by brake intervention via control unit and brake actuator, for example on one side or on a wheel brake.
  • control unit and brake actuator for example on one side or on a wheel brake.
  • This may concern powertrain, engine, transmission, suspension and / or bodywork both on its own and together.
  • control unit can hide the breakaway area, that is to say, for example, feed wheel pressures one after the other in order to avoid idling.
  • the dosing of the delay ie the state between roles and fixed, while maintaining.
  • the brake force distribution front to rear can be flexibly adapted to the driving situation and the brake load.
  • a controlled change in the braking force distribution from Namely or load-related reasons would then be easy to simulate the control unit and the brake actuator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Regulating Braking Force (AREA)

Abstract

L'invention concerne un procédé de freinage d'un véhicule automobile, présentant des freins de roue sans liaison de pression hydraulique à une installation de commande de frein, de plus avec un dispositif de freinage de service présentant un actionneur de frein, qui est déclenché en fin de compte à l'aide d'un dispositif de commande par un signal de sortie du dispositif de commande de frein, qui sollicite les freins de roue, suite à au moins une incitation, de manière sélective en ce qui concerne la roue ou l'essieu, de manière telle que la force de freinage change au moins sur une roue ou au moins sur un essieu, qui est caractérisé en ce que la force de freinage de consigne totale ralentissant le véhicule automobile est répartie par le dispositif de commande via l'actionneur de frein sur les différentes roues ou les différents essieux.
EP14726556.5A 2013-06-21 2014-05-15 Procédé pour le freinage d'un véhicule automobile Withdrawn EP3010771A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013211856.2A DE102013211856A1 (de) 2013-06-21 2013-06-21 Verfahren zum Abbremsen eines Kraftfahrzeugs
PCT/EP2014/059990 WO2014202292A1 (fr) 2013-06-21 2014-05-15 Procédé pour le freinage d'un véhicule automobile

Publications (1)

Publication Number Publication Date
EP3010771A1 true EP3010771A1 (fr) 2016-04-27

Family

ID=50828879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14726556.5A Withdrawn EP3010771A1 (fr) 2013-06-21 2014-05-15 Procédé pour le freinage d'un véhicule automobile

Country Status (5)

Country Link
US (1) US20160082936A1 (fr)
EP (1) EP3010771A1 (fr)
CN (1) CN105263769B (fr)
DE (1) DE102013211856A1 (fr)
WO (1) WO2014202292A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN104986135A (zh) * 2015-08-06 2015-10-21 陈凡 车辆制动噪音的抑制方法
DE102016201083A1 (de) 2016-01-26 2017-07-27 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Betreiben eines Fahrzeug-Bremssystems
WO2017129430A1 (fr) 2016-01-26 2017-08-03 Bayerische Motoren Werke Aktiengesellschaft Procédé permettant de faire fonctionner un système de freinage de véhicule
DE102016201085A1 (de) 2016-01-26 2017-07-27 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Betreiben eines Fahrzeug-Bremssystems
DE102017213056A1 (de) 2017-07-28 2019-01-31 Continental Teves Ag & Co. Ohg Verfahren zum Unterdrücken von Bremsgeräuschen, zentraler Server, Fahrzeugsteuerungsmodul und Speichermedium
DE102018210372A1 (de) * 2018-06-26 2020-01-02 Audi Ag Verfahren zum Betrieb eines Kraftfahrzeugs
DE102019215666B4 (de) * 2019-10-11 2022-09-22 Zf Friedrichshafen Ag Prozesseinheit zur Bremsgeräuscherkennung von durch ein Egofahrzeug erzeugten Bremsgeräuschen, Egofahrzeug und Verfahren
IT202100025136A1 (it) * 2021-09-30 2023-03-30 Brembo Spa Metodo per controllare la distribuzione di forze frenanti in un impianto frenante di un veicolo per ridurre o eliminare rumore e/o vibrazioni generati nell’impianto

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DE102009012885A1 (de) * 2008-03-20 2009-11-12 GM Global Technology Operations, Inc., Detroit Bremsgeräuschunterdrückung mittels Systemdruckmodulation

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DE4427170C1 (de) * 1994-08-01 1995-10-12 Daimler Benz Ag Verfahren zur Sicherstellung der Bremswirkung von Bremsen von Fahrzeugen bei Nässe
DE19804676A1 (de) 1998-02-06 1999-08-12 Audi Ag Verfahren zum Vermeiden von Quietschgeräuschen an Bremsanlagen
DE19947757C1 (de) * 1999-10-02 2001-01-25 Daimler Chrysler Ag Fremdkraft-Bremssystem für ein Fahrzeug
DE10111076B4 (de) * 2000-05-29 2010-02-04 Robert Bosch Gmbh Verfahren und Vorrichtung zur Sicherstellung der Bremswirkung von in einem Fahrzeug angeordneten Bremsaktuatoren
DE10248852B4 (de) * 2001-11-06 2012-05-31 Continental Teves Ag & Co. Ohg Verfahren zur Eliminierung von Bremsmomentschwankungen bei einer Kraftfahrzeugbremsanlage
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Also Published As

Publication number Publication date
WO2014202292A1 (fr) 2014-12-24
CN105263769A (zh) 2016-01-20
CN105263769B (zh) 2018-03-13
DE102013211856A1 (de) 2014-12-24
US20160082936A1 (en) 2016-03-24

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