EP1966015A1 - Procede pour empecher une activation intempestive d'une fonction de pre-freinage - Google Patents

Procede pour empecher une activation intempestive d'une fonction de pre-freinage

Info

Publication number
EP1966015A1
EP1966015A1 EP06830715A EP06830715A EP1966015A1 EP 1966015 A1 EP1966015 A1 EP 1966015A1 EP 06830715 A EP06830715 A EP 06830715A EP 06830715 A EP06830715 A EP 06830715A EP 1966015 A1 EP1966015 A1 EP 1966015A1
Authority
EP
European Patent Office
Prior art keywords
brake
function
accelerator pedal
deactivation
preventing
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Withdrawn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
EP06830715A
Other languages
German (de)
English (en)
Inventor
Torsten Cress
Stephan Groitzsch
Dennis Mehlhorn
Sebastian Joussen
Edgar Schirmer
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.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
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 Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP1966015A1 publication Critical patent/EP1966015A1/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Withdrawn legal-status Critical Current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
    • B60T8/32—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
    • B60T8/321—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 deceleration
    • B60T8/3255—Systems in which the braking action is dependent on brake pedal data
    • B60T8/3275—Systems with a braking assistant function, i.e. automatic full braking initiation in dependence of brake pedal velocity
    • 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
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/12—Pre-actuation of braking systems without significant braking effect; Optimizing brake performance by reduction of play between brake pads and brake disc

Definitions

  • the invention relates to a method for preventing a mal-activation of a brake standby function of a vehicle brake.
  • the invention is based on a known under the term "brake assist ,, braking device.
  • the origin for the creation of the brake assistant is the empirical observation that inexperienced drivers do not apply enough force to the brake pedal in the event of emergency braking in order to actually achieve the maximum possible braking effect.
  • the Brake Assist provides this remedy by building a greater brake pressure when it detects an emergency braking situation, as it corresponds to the position of the brake pedal.
  • a brake pressure is built up in the wheel brakes even before the driver actuates the brake pedal when an emergency braking situation is detected.
  • the advantage of this system is that it creates the brake pads or brake shoes on the brake discs or brake drums. Although no appreciable braking effect is achieved, but the response of the brake is shortened because the air gap of the brake pad or brake shoes is overcome even before pressing the brake pedal.
  • This function of the brake assist is also referred to as a brake standby function.
  • An essential aspect for the good functioning of the brake ready function is the reliable detection of an emergency braking situation.
  • a method for preventing a malfunction of a brake-ready function of a vehicle brake wherein the brake-ready function generates a brake pressure in the wheel brakes without actuating a brake pedal.
  • the method according to the invention is characterized by the following steps: a) determining a deactivation quantity as a function of the actuation of an accelerator pedal; and b) preventing the malfunction of the brake ready function, depending on the detected deactivation amount.
  • the invention is based on the vigniteliche consideration that a sporty driver not only lost quickly Fahrpe ⁇ dal, but also advance rapidly operates the accelerator pedal, to obtain a high acceleration.
  • This U- berlegung uses the invention to determine a deactivation Large under pressure, the brake standby function for a predetermined period of time sufficient to allow the sporty driver to take back the accelerator pedal, and can export the switching ⁇ process.
  • the deactivation amount for the brake-ready function is determined by the following steps: a) repeatedly measuring a position value during each calculation loop, which corresponds to the position of an accelerator pedal during actuation; b) comparing a currently measured position value of the accelerator pedal with a previously measured position value; c) deactivating the brake-ready function, depending on the comparison result of the position values.
  • the determination of the deactivation or Unterbuchungs is carried out in a calculation unit which operates clock-controlled, wherein a Re ⁇ chen begang through the unit corresponds to a calculation loop or a calculation loop, which takes a certain duration, the loop time to complete.
  • the change in the accelerator pedal position between at least two calculation loops , the gradient, which is a measure of how quickly a driver actuates the accelerator pedal, is expediently determined as a comparison result.
  • the comparison result is compared with a predetermined threshold value, which, if exceeded, deactivates the brake-ready function.
  • the threshold value is preferably the maximum possible modifier ⁇ the accelerator pedal position based alteration and is a fraction of this maximum possible change to.
  • the threshold is in a range between 10 and 30% of the maximum possible change in accelerator pedal position.
  • the deactivation of the brake ready function takes place for a predetermined period of time. Depending on empirical studies regarding fast gear changes in manual transmissions, ranges between one second and five seconds, preferably one and three seconds, have been determined for the suppression of the brake standby function.
  • Fig. 1 shows a schematic representation of an apparatus for carrying out the method according to the invention.
  • Fig. 2 shows the accelerator pedal position per calculation loop
  • the apparatus shown in FIG. 1 is designated as a whole by the reference numeral 1.
  • the device comprises an accelerator pedal 2 and a brake pedal 3.
  • the displacement paths and the adjustment speeds of the accelerator pedal 2 and the brake pedal 3 are detected by associated sensors 4.
  • driving commands are generated by an electric motor, which reads an engine control 6 and which requests according to the driving commands torque from a motor.
  • Such a motor control is known in the art, for example, under the keyword “drive-by-wire” and is therefore not further described at this point.
  • the invention is not limited to such devices and can also be used in hydraulic brake systems.
  • brake pedal 3 brake commands are transmitted to an electrohydraulic control unit 7, which ensures according to the brake commands of the driver for a corresponding brake pressure in the wheel brakes of the vehicle.
  • the electrohydraulic control unit 7 can likewise receive the travel commands generated with the accelerator pedal 2 via the data line 14. It is also known in the art as a component of so-called "brake-by-wire" braking systems. However, the invention is not limited to such brake systems and also in all other brake systems, eg hydraulic brake systems used.
  • the electro-hydraulic control unit 7 is signal-connected to a brake booster 8 and an electro-hydraulic unit 15. At the same time, the brake booster is also mechanically connected to the brake pedal 3.
  • the brake booster 8 transmits a mechanical movement to a master cylinder 9, in which a hydraulic pressure is generated, which is transmitted via brake lines 11 in the wheel brakes, which are not shown in Fig. 1.
  • a reservoir holder 12 for brake fluid is connected in terms of current to the master brake cylinder 9.
  • the master cylinder 9 and possibly also the brake cylinders of the wheel brakes are connected in an advantageous embodiment of the invention with pressure sensors, not shown in the figure 1.
  • a signal-wise connection 13 is provided between the engine control unit 6 and the electro-hydraulic control unit 7, which enables the transmission of a signal which is used to determine the brake ready function in FIG the electro-hydraulic control unit 7 is used, which triggers the Bremsrschaftsfunktion.
  • the signal unit connected to the control unit 7 hydraulic unit 15 has a pump, not shown, driven by a motor, which allows to generate a brake pressure without the driver operates the brake pedal 3.
  • the engine turns on and drives the pump to generate sufficient brake pressure to apply the brake pads or brake shoes in the wheel brakes.
  • the return speed of the accelerator pedal is read in or calculated by the engine control unit 6 or the electrohydraulic control unit 7 and, in the case of the engine control unit 6, fed to the electrohydraulic control unit 7.
  • these functions can also be performed by other components, in particular by a specially provided for this purpose evaluation. If the withdrawal speed exceeds a predetermined threshold value, then the brake standby function is triggered, that is, a low brake pressure is generated in the wheel brakes in order to eliminate the air play of brake linings or brake shoes.
  • the peculiarity of the invention consists in the fact that the driving behavior of the driver is monitored in order to determine a deactivation large for the suppression of the activation of the brake standby function.
  • Determining a de-activation size reliably prevents the brake-ready function from triggering for drivers with sporty driving behavior. Furthermore, the motor control 6 or the electrohydraulic control unit 7 operates in a clock-controlled manner, with a control passage through the control unit corresponding to a calculation loop or a calculation loop which occupies a certain duration, the loop time.
  • the number of calculation loops 0 to 8 is shown on the horizontal axis (abscissa) and the accelerator pedal position as a fraction of the maximum possible accelerator pedal position (at 100%) on the vertical axis (ordinate).
  • the positions of the accelerator pedal measured at regular time intervals are designated 21 to 25.
  • the curve 20 respectively represents an accelerator pedal position value in the operation of the accelerator pedal 2 during five calculation loops 1 to 5 when the driver operates the accelerator pedal 2 to the maximum possible accelerator pedal position at 100%, which corresponds to full throttle.
  • the method for preventing a malfunction of a brake-release function of a vehicle brake determines at each calculation loop a position value which corresponds to the position of the accelerator pedal 2 during actuation.
  • the position value 21 is stored in a memory of the engine controller 6 or the electro-hydraulic controller 7 between.
  • the next position value 22 of the accelerator pedal position is measured, for example, with sensor 4 and likewise made available to the controller 6 or 7.
  • This controller 6 or 7 now compares and evaluates the currently measured position value 22 with the previously measured position value 21.
  • the gradient of the function indicates how fast the driver actuates the accelerator pedal 2.
  • This gradient is preferably used as the deactivation amount for suppressing or deactivating the brake-ready function.
  • the deactivation quantity is compared with a threshold value.
  • a threshold the one sporty driving, values between 10 and 25% have emerged during two calculation loops, with one calculation loop covering a period between 8 and 12 ms.
  • FIG. 2 shows the change in the accelerator pedal position between the two calculation loops 3 and 4.
  • the determination of the deactivation amount is repeated over the entire course of the curve 20, that is between the calculation loops 1 and 2, 2 and 3, etc., until the limit position, namely the maximum possible accelerator pedal position or a short before lying limit position is reached. It does not matter in which calculation loop the threshold is exceeded.
  • the deactivation quantity on the basis of the accelerator pedal speed difference between two calculation loops, that is to say based on the accelerator pedal acceleration.
  • the operating speed is also evaluated only up to a selectable limit position of the accelerator pedal, the limit position is before the full throttle position, but also the full throttle position can be.
  • a low actuation acceleration corresponds to a rather sluggish driving behavior, and the deactivation threshold value for the brake-ready function is not exceeded.
  • At comparatively higher actuation accelerations is concluded on a sporty driving behavior, and a suppression of the brake-ready function is triggered.
  • the quantitative definitions of the individual parameters depend, of course, on the type of vehicle involved, and in particular on the maximum accelerator pedal operating speed. ability is possible with a vehicle. In driving tests, suitable parameters for a specific vehicle type can then be determined.
  • the brake standby function is deactivated for a predetermined period of time.
  • a period of time during which a brake-ready function is not permitted advantageously 1 to 5 s are provided. Within this period, the shifting operation of the driver in a manual transmission is securely performed without malfunction of the brake-ready function obstructing the athletic driver.

Landscapes

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

Abstract

L'invention concerne un procédé pour empêcher une activation intempestive d'une fonction de pré-freinage d'un frein de véhicule, ladite fonction de pré-freinage générant une pression de freinage dans les freins de roues sans activation d'une pédale de frein (3). L'activation intempestive de la fonction de pré-freinage est empêchée de la manière suivante : a) une grandeur de désactivation est déterminée en fonction de l'actionnement d'une pédale d'accélérateur (2) ; et b) l'activation intempestive de la fonction de pré-freinage est empêchée en fonction de la grandeur de désactivation définie.
EP06830715A 2005-12-23 2006-12-19 Procede pour empecher une activation intempestive d'une fonction de pre-freinage Withdrawn EP1966015A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005062368 2005-12-23
DE102006060470A DE102006060470A1 (de) 2005-12-23 2006-12-19 Verfahren zum Verhindern einer Fehlaktivierung einer Bremsbereitschaftsfunktion
PCT/EP2006/069895 WO2007074109A1 (fr) 2005-12-23 2006-12-19 Procede pour empecher une activation intempestive d'une fonction de pre-freinage

Publications (1)

Publication Number Publication Date
EP1966015A1 true EP1966015A1 (fr) 2008-09-10

Family

ID=38190200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06830715A Withdrawn EP1966015A1 (fr) 2005-12-23 2006-12-19 Procede pour empecher une activation intempestive d'une fonction de pre-freinage

Country Status (3)

Country Link
EP (1) EP1966015A1 (fr)
DE (1) DE102006060470A1 (fr)
WO (1) WO2007074109A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008005434A1 (de) * 2008-01-22 2009-07-30 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Verfahren zur Betätigung einer nass laufenden Lamellenbremse sowie nass laufende Lamellenbremse
DE102013220582A1 (de) * 2013-10-11 2015-04-16 Continental Teves Ag & Co. Ohg Verfahren zum Betreiben eines Bremssystems

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4422664A1 (de) * 1993-07-03 1995-03-09 Peter Luepges Vorrichtung zum Bremsen
DE19629229C2 (de) * 1996-07-20 2002-06-20 Daimler Chrysler Ag Verfahren zur Durchführung eines automatischen Bremsvorgangs
DE19631862B4 (de) * 1996-08-07 2013-03-21 Continental Teves Ag & Co. Ohg Bremsvorrichtung
DE19745128C2 (de) * 1997-10-13 1999-08-19 Daimler Chrysler Ag Verfahren zur Bestimmung eines Auslöseschwellenwertes für einen automatischen Bremsvorgang
DE10160278A1 (de) * 2001-06-02 2002-12-05 Continental Teves Ag & Co Ohg Verfahren zur Verbesserung einer Bremsassistentfunktion
WO2006008248A1 (fr) * 2004-07-21 2006-01-26 Continental Teves Ag & Co. Ohg Procede pour realiser une fonction de pre-freinage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007074109A1 *

Also Published As

Publication number Publication date
WO2007074109A1 (fr) 2007-07-05
DE102006060470A1 (de) 2007-07-19

Similar Documents

Publication Publication Date Title
DE102008051535B4 (de) Verfahren und System zum Ermitteln des Einleitens eines Notbremsmanövers
DE4438017C2 (de) Verfahren und Vorrichtung zur elektrischen Steuerung bzw. Regelung der Bremsanlage eines Fahrzeugs
DE10062652B4 (de) Vorrichtung und Verfahren zum Regeln einer Fahrzeugverzögerung
EP0733532B1 (fr) Procédé de détermination de la pression de déclenchement d'un frein actionné par pression dans un système de freinage de véhicule
DE102004047014A1 (de) Fahrzeugsteuergerät
DE10015299A1 (de) Verfahren und Vorrichtung zur Auslösung einer Übernahmeaufforderung für ACC-gesteuerte Fahrzeuge
DE3404018A1 (de) Fahrzeugbremsanlage mit mitteln zum vermindern von antriebsschlupf
EP1768881B1 (fr) Procede pour realiser une fonction de pre-freinage
DE102010020495B4 (de) Kraftfahrzeug mit Bremsüberwachung und Betriebsverfahren
EP1387777A1 (fr) Procede de regulation de la vitesse d'un vehicule
DE19910048A1 (de) Verfahren und Vorrichtung zur Überwachung der Bewegung eines Aktuators
DE102005018036A1 (de) Regeleinheit für ein Fahrzeugsystem mit Hilfsregelmöglichkeiten
DE60319944T2 (de) Adaptive Geschwindigkeitsregelvorrichtung
DE10347844B4 (de) Verfahren und Vorrichtung zur Aktivierung/Deaktivierung eines Längsdynamiksystems
WO2007074109A1 (fr) Procede pour empecher une activation intempestive d'une fonction de pre-freinage
EP1436184B1 (fr) Procede de surveillance d'un systeme de freinage electro-hydraulique de vehicule
DE102010021935A1 (de) Bremspedalsimulator und Bremssystem
WO1999008913A1 (fr) Dispositif et procede pour commander un circuit de freinage de vehicule automobile
EP1802499B1 (fr) Procede et dispositif pour debloquer la fonction d'assistance de freinage dans une automobile
DE102004006697A1 (de) Überprüfung der Funktionsfähigkeit einer Feststellbremse durch Auswertung der Raddrehzahlen
DE102004026722B4 (de) Verfahren zum Verhindern eines Wegrollens eines Fahrzeugs
WO2006114423A1 (fr) Procede et dispositif d'identification d'un point de frottement d'un embrayage
DE102006002777A1 (de) Verfahren zum Betreiben einer Bremsanlage eines Fahrzeugs
DE102004027257B4 (de) Verfahren zum Verhindern eines Wegrollens eines Fahrzeugs
WO2009033961A2 (fr) Procédé pour améliorer le comportement au freinage en présence d'un coefficient de freinage défavorable

Legal Events

Date Code Title Description
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

17P Request for examination filed

Effective date: 20080723

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR

RBV Designated contracting states (corrected)

Designated state(s): DE FR

17Q First examination report despatched

Effective date: 20090630

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20100112