WO2011032754A1 - Procédé pour actionner un système de frein de stationnement dans un véhicule - Google Patents

Procédé pour actionner un système de frein de stationnement dans un véhicule Download PDF

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Publication number
WO2011032754A1
WO2011032754A1 PCT/EP2010/060561 EP2010060561W WO2011032754A1 WO 2011032754 A1 WO2011032754 A1 WO 2011032754A1 EP 2010060561 W EP2010060561 W EP 2010060561W WO 2011032754 A1 WO2011032754 A1 WO 2011032754A1
Authority
WO
WIPO (PCT)
Prior art keywords
braking force
actuator
brake actuator
determined
vehicle
Prior art date
Application number
PCT/EP2010/060561
Other languages
German (de)
English (en)
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 WO2011032754A1 publication Critical patent/WO2011032754A1/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
    • 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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/24—Electric or magnetic using motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/40—Screw-and-nut

Definitions

  • the invention relates to a method for actuating a parking brake system in a vehicle.
  • DE 10 2004 006 338 A1 describes a parking brake system in a vehicle which, as a brake actuator, comprises a hydraulic actuator with a pump for generating the desired brake pressure.
  • a device is provided for determining the braking force acting on the parking brake, wherein the hydraulic actuator is actuated by actuating signals of a control device taking into account the determined braking force. In this way, a required minimum braking force can be set accurately, whereby the burden of the components involved is reduced.
  • the invention has for its object to provide a sufficiently high parking brake force in a parking brake system with minimized component load.
  • the inventive method relates to an actuation of a parking brake system in a vehicle, wherein the parking brake system on the one hand an electrically actuated brake actuator and on the other
  • the electric brake actuator and the hydraulic actuator are basically independently controllable to generate a mechanical or hydraulic braking force, so that the respective proportions of mechanical and hydraulic braking force, which go back to the electric or hydraulic actuator, depending on the current situation can be set variably.
  • the currently required braking force is preferred or set primarily via the electrically actuatable brake actuator.
  • the hydraulic actuator is operated in addition only in the event that the required braking force can not be applied by the operation of the electric brake actuator alone.
  • the currently required braking force is initially determined, which depends on ambient conditions, in particular on the gradient of the roadway on which the vehicle is currently located.
  • the currently required braking force is compared with the mechanical braking force, which can be maximally achieved with the electrically actuatable brake actuator. If this comparison shows that the maximum achievable mechanical braking force is less than the currently required braking force, so that alone the required braking force can not be provided by an operation of the electric brake actuator, the hydraulic actuator is additionally actuated to the remaining braking force, which the difference of currently required braking force and maximum possible mechanical braking force corresponds to provide as hydraulic braking force.
  • Brake actuator and to be provided via the electric brake actuator braking force.
  • the connection of the hydraulic brake actuator takes place only in a smaller number of cases in which the mechanical braking force of the e lectric brake actuator is insufficient.
  • only the differential braking force has to be generated via the hydraulic brake actuator, so that the It must also produce only a relatively small hydraulic brake pressure.
  • an electric brake actuator are all electrically adjustable actuators or actuators into consideration, in particular electric motors, but also electromagnetic actuators and other actuators that perform a mechanical adjusting movement when creating an e- lectric voltage that can be used to generate a braking force.
  • the currently achievable mechanical braking force which is adjustable via the electrically actuatable brake actuator, is determined as a function of the maximum available current in the power supply of the electric brake actuator. This approach has the advantage that restrictions both in terms of the maximum available voltage and in terms of maximum
  • the maximum available current is in this case calculated, in particular, on the one hand from the ratio of battery voltage to ohmic resistance of the electric brake actuator, preferably including the supply lines.
  • a component protection of various components in the parking brake system can be taken into account, which allows only an energization up to a maximum in order to avoid damage to the respective component, for example a relay.
  • the maximum current available for the energization of the electric brake actuator is calculated from the minimum of the two aforementioned current values. In this way, both the
  • the maximum available current flows into the calculation of the achievable mechanical braking force of the electric brake actuator.
  • the decision can be made whether the operation of the electrical brake actuator is sufficient or whether, in addition, the hydraulic actuator must be actuated.
  • a lower gradient threshold value and possibly also an upper gradient threshold for the road gradient it may be expedient to additionally take into account a lower gradient threshold value and possibly also an upper gradient threshold for the road gradient and to actuate the electrical or additionally the hydraulic actuator as a function of the gradient threshold values. For example, in the event that the actual slope value is below the lower slope threshold, only the electric brake actuator is actuated. On the other hand, if the actual slope is above the lower slope threshold, then a query is made as to whether the achievable mechanical braking force is less than that required to hold the vehicle at an upper, overlying gradient threshold. If so, the hydraulic actuator is additionally actuated; otherwise, the mechanical braking force will be at a level corresponding to holding the vehicle at the upper grade threshold so that the supplemental actuation of the hydraulic actuator may be dispensed with.
  • the inventive method runs in a control or control unit in the vehicle, which is part of the parking brake system.
  • 1 shows a section through a braking device in a vehicle, with an electric motor for acting on a brake piston, which is additionally acted upon by hydraulic pressure
  • 2 is a schematic diagram of a brake system in a vehicle, each having a braking device on each wheel, wherein the brake devices are actuated on the rear wheels both by electric motor and by hydraulic pressure
  • FIG. 3 is a flowchart for actuating a parking brake system in a vehicle
  • FIG. 4 shows a further flowchart for actuating a parking brake system in a variant embodiment.
  • Fig. 1 shows a wheel brake 1 with a caliper 2, a brake piston 3 and an electric brake actuator 4, which acts on the brake piston 3 and adjusted in the direction of a pair of pliers 8 of the caliper 2.
  • the free end face 9 presses with a braking force on a brake disc, which is overlapped by the caliper 2.
  • the brake piston 3 is adjusted axially by means of an electric brake actuator 4, which is designed in particular as an electric motor and an intermediate gear drives a spindle 5, the rotational movement is converted via a transmission element 6 in an axial adjusting movement, which adjusts the brake piston 3 in the braking position.
  • the transmission element 6, which is provided with an internal thread and is seated on the external thread of the spindle 5, is located in the interior of the hollow cylindrical brake piston 3 and is connected to the brake piston 3.
  • the brake piston can also be acted upon by a hydraulic brake pressure in the braking position, wherein the hydraulic brake pressure at the electric brake actuator 4 facing end face 7 of the brake piston 3 acts.
  • a brake system 10 is shown in a vehicle with wheel brake 1 at the wheels of the rear axle and wheel brake 1 1 at the wheels of the front axle.
  • the brake system 1 can be used as a parking brake system.
  • the bike Braking devices 1 on the rear axle are designed as described in FIG. 1 and each have a designed as an electric motor electric brake actuator 4, which acts on the respective brake piston.
  • the wheel brake devices 1 1 at the rear axle via a Hydraulikak- tuator 12, which includes a hydraulic pump, and hydraulic lines 13 and 14 to apply hydraulic brake pressure.
  • the wheel brake devices 11 on the front axle of the vehicle can only be actuated via the hydraulic actuator 12 and hydraulic lines 15 and 16 with hydraulic brake pressure.
  • the front wheel brake 1 1 have no electric brake actuator.
  • a control or control device 17 is provided, via which the hydraulic actuator 12 with control signals to build a desired
  • Brake pressure is controlled.
  • the control unit 17 may be part of an electronic stability program (ESP).
  • ESP electronic stability program
  • the wheel brake 1 on the rear axle of the vehicle are also set on the electric brake actuators 4, which are acted upon by control signals of another control or control device 18, which is expediently part of the parking brake system.
  • the control or control devices 17 and 18 communicate with each other, they may optionally also be combined to form a common control or control device.
  • the parking brake system is actuated manually by the driver via a switch 19, which supplies a corresponding control signal to the control or control device 18 for actuating the electric brake actuators 4 or to the control or control device 17 for actuating the hydraulic brake actuator 12.
  • a display unit 20 is actuated, which is designed, for example, as an optical display unit and via which the driver is informed about the activation of the parking brake system.
  • a battery 21 is provided to power the electric brake actuators 4 in the wheel brake 1 on the rear axle.
  • a first method step 30 it is first determined whether a parking request has been made by the driver. If this is the case, in the next method step 31, first of all, the required clamping force, with which the wheel brake devices have to be acted upon, on the basis of the current gradient of the roadway on which the vehicle is located, is determined, so that the vehicle is safely stopped.
  • the achievable mechanical braking force F br , e is first determined, which is a maximum below the current circumstances can be adjusted via the electrically actuated brake actuator.
  • first engine parameters of the brake actuator designed as an electric brake motor are ascertained, in particular the motor constant k eng , the motor resistance including the resistance of the supply lines R mot and the no-load current or the idling torque M R0 . These parameters are determined in method step 32.
  • step 33 the clamping force which can be achieved via the electric brake actuator is determined under existing conditions. The achievable
  • Braking force F br e, which can be adjusted via the electric brake actuator, is calculated from the formula ⁇ ⁇ ⁇ Ro)
  • r determined.
  • r res is the resulting radius of the electric brake actuator
  • Hmech is the mechanical efficiency of the electric brake actuator
  • k eng is the engine constant
  • M R0 is the idle torque.
  • the achievable mechanical braking force F br , e is determined according to the aforementioned relationship from the maximum available current l max , according to from the minimum of the maximum permissible current load l max , dev of the components in the parking brake system and the ratio of the battery voltage U ba t and resistance R mo t of the electric brake actuator is determined, via the resistor R mo t additionally the resistance of the leads can be considered.
  • the maximum allowable current load l max dev component protection of existing in the parking brake system electronic components is achieved, for example, relays that may be acted upon only with a specific, component-specific maximum current. To ensure that this maximum current is not exceeded, the electric brake actuator is applied in the parking brake system with the limited in the aforementioned manner maximum current Lax.
  • step 34 it is queried whether the achievable clamping force F br, e for the current gradient level of the roadway is sufficient for setting the vehicle, which is based on a comparison of achievable Clamping force F br, e is performed with the current required braking force F br act . If the achievable mechanical braking force F br e is sufficient, the Y-branching ("Y") is continued following the next method step 35, in which the electric brake actuator is subjected to the adjustment of the mechanical braking force A hydraulic braking force actuation is omitted in this case.
  • the no-branching is proceeded to method step 36, in which both the electric brake actuator and the hydraulic actuator This is preferably done in such a way that the maximum achievable mechanical braking force F br e applied via the electric brake actuator and the hydraulic brake pressure is adjusted in addition to reach the currently required braking force.
  • FIG. 4 shows a variant embodiment in the control of the electrically actuatable brake actuator and of the hydraulic actuator in the event of immobilization of the vehicle at standstill.
  • method step 40 It is correct whether there is a parking request by the driver. If this is the case, a query is made in the next method step 41 as to whether the current roadway gradient exceeds a lower gradient threshold value, for example a gradient threshold value of 20%. If this is not the case, the no branch is followed, proceeding to method step 42, in which the parking brake force is set exclusively via the electric brake actuator, at a fixed braking force level which corresponds to the lower gradient threshold value. If the current roadway slope exceeds the lower gradient threshold, for example, 20%, the Yes branch is continued following the process step 43, in which motor parameters of the electric
  • Bremsaktuators are determined, in particular the motor constant, the motor resistance and the idling current and derived variables.
  • the mechanical braking force F br, e achievable under the current conditions via the actuation of the electric brake actuator is determined analogously to the procedure described in FIG.
  • another query is made as to whether the achievable mechanical braking force Fbr, e is sufficient for a gradient level which corresponds to an upper gradient threshold value, for example a gradient threshold value of 30%. Is this the
  • step 46 proceed to step 46 and set a brake force corresponding to a 30% power level via the electric brake actuator, that is, sufficient to set the vehicle on a 30% grade roadway.
  • An additional actuation of the hydraulic actuator can be dispensed with.
  • Hydraulic actuator to be controlled. About the electric brake actuator, the maximum achievable braking force F br, e is set, the difference up to the 30% -Bremskraftmat is set in addition to the hydraulic actuator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulating Braking Force (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

L'invention concerne un procédé pour actionner un système de frein de stationnement dans un véhicule, présentant un actionneur de frein électrique et un actionneur hydraulique qui peuvent être commandés indépendamment l'un de l'autre. Ce procédé consiste à déterminer tout d'abord la force de freinage requise puis à la comparer à la force de freinage pouvant être obtenue par l'intermédiaire de l'actionneur de frein électrique, l'actionneur hydraulique étant actionné de manière complémentaire uniquement lorsque la force de freinage requise dépasse celle qui peut être obtenue par l'intermédiaire de l'actionneur électrique.
PCT/EP2010/060561 2009-09-17 2010-07-21 Procédé pour actionner un système de frein de stationnement dans un véhicule WO2011032754A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910029525 DE102009029525A1 (de) 2009-09-17 2009-09-17 Verfahren zur Betätigung eines Feststellbremssystems in einem Fahrzeug
DE102009029525.9 2009-09-17

Publications (1)

Publication Number Publication Date
WO2011032754A1 true WO2011032754A1 (fr) 2011-03-24

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Application Number Title Priority Date Filing Date
PCT/EP2010/060561 WO2011032754A1 (fr) 2009-09-17 2010-07-21 Procédé pour actionner un système de frein de stationnement dans un véhicule

Country Status (2)

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DE (1) DE102009029525A1 (fr)
WO (1) WO2011032754A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8942906B2 (en) 2010-09-10 2015-01-27 Robert Bosch Gmbh Method for adjusting the clamping force exerted by a parking brake, regulating and control appliance for carrying out said method, and vehicle parking brake comprising such a control appliance
DE102013217106A1 (de) 2013-08-28 2015-03-05 Robert Bosch Gmbh Verfahren zum Festsetzen eines Fahrzeugs mit einem hydraulischen Bremssystem

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011077786A1 (de) * 2011-06-20 2012-12-20 Continental Teves Ag & Co. Ohg Aktuatorsystem und Betriebsverfahren für ein Aktuatorsystem
CN103619679B (zh) * 2011-06-20 2017-06-13 大陆-特韦斯贸易合伙股份公司及两合公司 用于液压支持车辆的电动驻车制动器的方法
DE102015219554B4 (de) * 2015-10-08 2021-05-20 Zf Friedrichshafen Ag Verfahren und Steuergerät zur Bestimmung einer Bremskraft oder einer der Bremskraft entsprechenden Größe
US20190329746A1 (en) * 2018-04-25 2019-10-31 Continental Automotive Systems, Inc. Hydraulic rear brake manual actuation through electronic stability control software

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005073043A1 (fr) * 2004-01-30 2005-08-11 Lucas Automotive Gmbh Procede pour faire fonctionner l'equipement de freinage d'un vehicule
DE102004006338A1 (de) 2004-02-10 2005-08-25 Robert Bosch Gmbh Verfahren zum bremskraftabhängigen Ansteuern einer Festellbremse für Kraftfahrzeuge

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005073043A1 (fr) * 2004-01-30 2005-08-11 Lucas Automotive Gmbh Procede pour faire fonctionner l'equipement de freinage d'un vehicule
DE102004006338A1 (de) 2004-02-10 2005-08-25 Robert Bosch Gmbh Verfahren zum bremskraftabhängigen Ansteuern einer Festellbremse für Kraftfahrzeuge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8942906B2 (en) 2010-09-10 2015-01-27 Robert Bosch Gmbh Method for adjusting the clamping force exerted by a parking brake, regulating and control appliance for carrying out said method, and vehicle parking brake comprising such a control appliance
DE102013217106A1 (de) 2013-08-28 2015-03-05 Robert Bosch Gmbh Verfahren zum Festsetzen eines Fahrzeugs mit einem hydraulischen Bremssystem

Also Published As

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