WO2012079803A2 - Procédé de réglage de la force de serrage exercée par un frein de stationnement - Google Patents

Procédé de réglage de la force de serrage exercée par un frein de stationnement Download PDF

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Publication number
WO2012079803A2
WO2012079803A2 PCT/EP2011/067855 EP2011067855W WO2012079803A2 WO 2012079803 A2 WO2012079803 A2 WO 2012079803A2 EP 2011067855 W EP2011067855 W EP 2011067855W WO 2012079803 A2 WO2012079803 A2 WO 2012079803A2
Authority
WO
WIPO (PCT)
Prior art keywords
brake
point
parking brake
recalibration
nominal force
Prior art date
Application number
PCT/EP2011/067855
Other languages
German (de)
English (en)
Other versions
WO2012079803A3 (fr
Inventor
Karsten Bieltz
Simon Hauber
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2012079803A2 publication Critical patent/WO2012079803A2/fr
Publication of WO2012079803A3 publication Critical patent/WO2012079803A3/fr

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
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
    • 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
    • B60T13/58—Combined or convertible systems
    • B60T13/588—Combined or convertible systems both fluid and mechanical assistance or drive
    • 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
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/045—Brake-action initiating means for personal initiation foot actuated with locking and release means, e.g. providing parking brake application
    • 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
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/08—Brake-action initiating means for personal initiation hand actuated
    • B60T7/10—Disposition of hand control
    • B60T7/107—Disposition of hand control with electrical power assistance
    • 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
    • B60T2270/413—Plausibility monitoring, cross check, redundancy

Definitions

  • the invention relates to a method for adjusting the clamping force exerted by a parking brake in a vehicle.
  • PRIOR ART DE 103 61 042 B3 describes a method for setting a parking brake, which has as an actuator an electric motor, upon actuation of which a brake piston, which is the carrier of a brake lining, is adjusted axially in the direction of a brake disk.
  • a brake piston which is the carrier of a brake lining
  • the switch-off current of the electric motor is varied.
  • the invention has for its object to be able to determine with simple measures and in a safe way the wear of brake pads in an electromechanical parking brake.
  • Parking brake in a vehicle having an electric actuator via which a clamping force for setting the vehicle at standstill can be generated.
  • the actuator is usually an electric brake motor.
  • a spindle member is axially displaced by the rotation of the brake motor in the direction of a brake disc, whereby a acted upon by the spindle member brake piston which is a carrier of a brake pad is pressed against an end face of the brake disc.
  • the clamping force which is exerted by the parking brake can, if appropriate, be supported hydraulically by the hydraulic vehicle brake by additionally applying the hydraulic pressure of the vehicle brake to the brake piston.
  • the position of the spindle component which is axially adjustable via the brake motor, is first determined in a previously performed calibration step at a reference nominal force point when the brake pads are pressed against the brake disc.
  • This reference nominal force point is, for example, the force rise point at the beginning of the pressing of the brake pads against the brake disk; In principle, however, other reference nominal power points can also be selected.
  • Position of the axially adjustable spindle component in the reference nominal force point is stored as a reference point.
  • the position of the spindle component is determined upon reaching the current nominal force point and the spindle component path determined by the spindle component between the reference point and the current point is reached when the nominal force is reached. If the spindle component travel exceeds a threshold, an error signal is generated which is either displayed or otherwise processed.
  • This threshold value is expediently not higher or identical to twice the brake pad thickness, wherein optionally a tolerance value can be taken into account. This ensures that at the latest with the achievement of the maximum possible wear - the complete wear of the brake pads - appropriate measures are taken to further pressure of the used brake pads against the brake disc and thus a
  • the force rise point is selected at the beginning of the pressing of the brake pads against the brake disk.
  • This nominal force point is determined both during the calibration step as a reference nominal force point and during the current operation. drive as the current nominal power point.
  • the current nominal force point is reached at a changed position of the spindle member. This distance covered by the spindle component corresponds to the wear of the brake linings and must not exceed the selected threshold value.
  • the spindle component is adjusted during the calibration step up to a distinctive point, which does not coincide with the reference point to the reference nominal force point, but marks an absolute reference zero point.
  • this is the rear, the brake disc remote stop of the spindle member.
  • the spindle component is adjusted until it reaches the rear stop and the position is set as the reference zero point during impact. This makes it possible, starting from the reference zero point, to determine the distance traveled by the spindle component until it reaches the reference nominal force point as an absolute reference path, from which the comparison with the current travel of the spindle component during ongoing operation is drawn.
  • the comparison here refers either to the reference zero point (rear stop) or to the reference nominal force point.
  • the absolute reference zero point offers the possibility of carrying out a new calibration during operation after a certain number of actuations of the parking brake.
  • the spindle component is adjusted again until the rear stop is reached and the position at the stop is defined as the new reference zero point, which overwrites the previous reference zero point.
  • drifting of the zero point can be compensated, in which the smallest errors can add up to a greater total error due to the repeated application of the parking brake.
  • This drift can be compensated via the recalibration step, which increases the accuracy in determining the brake pad wear.
  • the recalibration step corresponds to the calibration step, which is carried out in advance before starting the current operation. The recalibration can be carried out automatically with the achievement of various criteria.
  • a recalibration at defined times for example, with the achievement of a certain number of actuation of the parking brake comes into consideration.
  • a recalibration with the achievement of a certain distance traveled in the vehicle can be performed.
  • the criteria for performing the recalibration may be cumulative or alternative.
  • a brake motor is advantageously used in the parking brake.
  • other electrically adjustable actuators come into consideration, for example, electromagnetic actuators that perform a mechanical adjustment when applying an electrical voltage, which serves to generate a clamping force.
  • the inventive method runs in a control or control unit in the vehicle, which may be part of the parking brake system.
  • FIG. 1 shows a section through an electromechanical parking brake for a vehicle, in which the clamping force is generated by an electric brake motor, shown in a retracted position of an axially adjustable spindle member,
  • Fig. 4 is a graph showing the time-dependent course of the current, the engine speed and the travel when Zuspannvorgang the parking brake.
  • an electromechanical parking brake 1 for setting a vehicle is shown at a standstill.
  • the parking brake 1 comprises a caliper 2 with a pair of pliers 9, which engages over a brake disk 10.
  • the parking brake 1 an electric motor as a brake motor 3, which drives a spindle 4 in rotation, on which a spindle member 5 is rotatably mounted.
  • the spindle member 5 is moved axially.
  • the spindle component 5 moves within a brake piston 6, which is the carrier of a brake pad 7, which is pressed by the brake piston 6 against the brake disk 10.
  • On the opposite side of the brake disk 10 is another brake pad 8, which is held stationary on the pliers 9.
  • the spindle member 5 during a rotational movement of the spindle 4 axially forward in the direction of the brake disc 10 to move or at an opposite rotational movement of the spindle 4 axially to the rear until reaching a stop 1 1. If the spindle component 5 is located on the inner end face of the brake piston 6 (FIGS. 2, 3), the brake piston 6 mounted axially displaceably in the parking brake 1 is pressed with the brake lining 7 against the facing end face of the brake disk 10.
  • the parking brake can be assisted by a hydraulic vehicle brake, so that the clamping force is composed of an electromotive component and a hydraulic component.
  • the rear side of the brake piston 6 facing the brake motor is subjected to pressurized hydraulic fluid.
  • the spindle member 5 is shown in its maximum retracted position, in which the spindle member 5 is in contact with a stop 11, in which it is a housing-fixed component, in particular to a stop on the rotationally driven by the brake motor 3 spindle 4. This position of the spindle member 5 is set as the reference zero point.
  • the spindle member 5 is shown in an axially advanced position in which the spindle member 5 presses the brake piston 6 with the brake pad 7 against the brake disk 10.
  • a first calibration step which is carried out prior to commencement of the regular actuation of the parking brake, the spindle component 5 is adjusted between the two positions according to FIGS. 1 and 2 and the travel distance s 0 is stored as a reference travel.
  • the parking brake is in a reference
  • Nominal force point which is advantageously identical to the force rise point at the beginning of the pressing of the brake pads against the brake disc 10.
  • Fig. 3 illustrates the situation during ongoing operation, in which the
  • Spindle member 5 is also located in an axially advanced position.
  • the two brake pads 7 and 8 on opposite sides of the brake disc 10 are, as can be seen from a comparison with FIGS. 1 and 2, already reduced by wear in the thickness, so that until reaching a current Nomi- nal force point - current power increase point - against the reference path s 0 an additional travel ⁇ s is covered by the spindle member 5.
  • This additional travel ⁇ s corresponds to the double current wear of the brake pads.
  • Threshold d are given, where d corresponds, for example, twice the brake pad thickness. This represents the maximum possible wear.
  • the position of the spindle component 5 is continuously determined in the current nominal force point, that is to say as a rule in the force rise point. If the actuating path As reaches the threshold value db, an error signal is generated which can be further processed in a suitable manner, for example, can be displayed to the driver.
  • Fig. 4 is a diagram with the current waveform I and the speed curve n of the electric brake motor and the travel s of the spindle member 5 is shown time-dependent for a Zuspannvorgang.
  • time t1 the start of tensioning process by applying a voltage and energizing the brake motor when the circuit is closed.
  • the engine speed n has reached its maximum.
  • the phase between t2 and t3 represents the idle phase in which the current I moves to a minimum level.
  • the force build-up phase from the time t3 to the time t4, in which rest against the brake pads on the brake disc and are pressed with increasing force against the brake disc.
  • time t4 the switching off of the electric brake motor takes place.
  • the force rise point is at the beginning of the phase of force building, with the
  • Time t3 starts.
  • the force buildup can be determined, for example, based on the course of the current I of the brake motor, which basically has the same course as the electromechanical clamping force. Starting from the low level during the idle phase between t2 and t3, the current progression increases steeply at the beginning of time t3. This increase in current can be detected and used to determine the force rise point. In principle, however, the course of the force build-up can also be determined from the voltage or speed curve or from any combination of the signals current, voltage and rotational speed.
  • the absolute reference zero point is redetermined by the spindle component 5 being moved back again to the stop 11 and the stop position being defined as the new reference zero point.
  • the recalibration is carried out at specific times, for example after a defined number of applications of the parking brake, with the achievement of a defined distance traveled and / or in the event of manual intervention in the parking brake.

Landscapes

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

Abstract

L'invention concerne un procédé de réglage de la force de serrage exercée par un frein de stationnement et générée au moins en partie par un dispositif de freinage électromécanique équipé d'un actionneur électrique. Pour permettre de détecter l'usure des garnitures de frein au préalable dans une étape d'étalonnage, le procédé consiste à déterminer la position d'un élément d'arbre déplaçable axialement par un actionneur, en un point de force nominale de référence, lorsque les garnitures de frein appuient sur le disque de frein. Le procédé consiste ensuite, lorsque le frein de stationnement est en service, à déterminer la course de l'élément d'arbre lorsque le frein de stationnement est actionné entre le point de force nominale de référence et un point de force nominale effectif.
PCT/EP2011/067855 2010-12-17 2011-10-13 Procédé de réglage de la force de serrage exercée par un frein de stationnement WO2012079803A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010063353.4 2010-12-17
DE201010063353 DE102010063353A1 (de) 2010-12-17 2010-12-17 Verfahren zum Einstellen der von einer Feststellbremse ausgeübten Klemmkraft

Publications (2)

Publication Number Publication Date
WO2012079803A2 true WO2012079803A2 (fr) 2012-06-21
WO2012079803A3 WO2012079803A3 (fr) 2012-08-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/067855 WO2012079803A2 (fr) 2010-12-17 2011-10-13 Procédé de réglage de la force de serrage exercée par un frein de stationnement

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DE (1) DE102010063353A1 (fr)
WO (1) WO2012079803A2 (fr)

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Publication number Priority date Publication date Assignee Title
DE102014212594B4 (de) 2014-06-30 2024-05-16 Continental Automotive Technologies GmbH Verfahren zur Erkennung des Verschleißes eines Bremssystems und Bremssystem
EP2998607A1 (fr) * 2014-09-16 2016-03-23 Meritor Heavy Vehicle Braking Systems (UK) Limited Procédé et système d'ajustement du jeu de la course d'un composant de freinage
DE102016214219A1 (de) * 2016-08-02 2018-02-08 Robert Bosch Gmbh Verfahren zur Wartung eines Bremssystems mit hydraulischer Fahrzeugbremse und elektromechanischer Bremsvorrichtung
DE102022120404A1 (de) 2022-08-12 2024-02-15 Zf Active Safety Gmbh Verfahren und Vorrichtung zum Bestimmen des Verschleißes einer Bremse

Citations (1)

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Publication number Priority date Publication date Assignee Title
DE10361042B3 (de) 2003-12-23 2005-05-25 Lucas Automotive Gmbh Feststellbremse und Verfahren zur Steuerung derselben

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NL1006540C2 (nl) * 1997-07-10 1999-01-15 Skf Ind Trading & Dev Elektrische actuator met regelsensor, alsmede schijfrem omvattende een dergelijke actuator.
DE19730094A1 (de) * 1997-07-14 1999-01-21 Itt Mfg Enterprises Inc System zum Steuern oder Regeln einer elektromechanischen Bremse
DE19910048A1 (de) * 1998-10-27 2000-05-04 Continental Teves Ag & Co Ohg Verfahren und Vorrichtung zur Überwachung der Bewegung eines Aktuators
DE10228115B4 (de) * 2002-06-24 2004-05-13 Lucas Automotive Gmbh Elektrisch betätigbare Fahrzeugbremse und Verfahren zur Steuerung einer elektrisch betätigbaren Fahrzeugbremse
DE10214669B4 (de) * 2002-04-03 2014-01-23 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Verfahren und Vorrichtung zur Ansteuerung einer elektrisch betätigten Verschleißnachstelleinrichtung
FR2841311B1 (fr) * 2002-06-25 2004-12-24 Renault Sa Dispositif et procede de determination de l'etatd'usure d'un systeme de freinage equipant une roue de vehicule automobile
SE526946C2 (sv) * 2003-06-13 2005-11-22 Haldex Brake Prod Ab Sensor system
GB0410659D0 (en) * 2004-05-13 2004-06-16 Meritor Heavy Vehicle Braking Brake pad wear indicator
DE102006002307A1 (de) * 2006-01-18 2007-07-19 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Verfahren zum Anzeigen von Verschleiß zumindest eines Bremsbelags bei einer Scheibenbremse mit elektromotorischem Aktuator
DE102008018749A1 (de) * 2007-09-12 2009-03-26 Continental Teves Ag & Co. Ohg Verfahren zum gesicherten Lösen einer elektromechanisch betätigbaren Feststellbremse
DE102007049717B4 (de) * 2007-10-17 2021-05-12 Robert Bosch Gmbh Bremseinrichtung sowie Verfahren zur Berechnung eines Bremsmoments einer Bremseinrichtung

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Publication number Priority date Publication date Assignee Title
DE10361042B3 (de) 2003-12-23 2005-05-25 Lucas Automotive Gmbh Feststellbremse und Verfahren zur Steuerung derselben

Also Published As

Publication number Publication date
WO2012079803A3 (fr) 2012-08-16
DE102010063353A1 (de) 2012-06-21

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