WO2016162109A1 - Procédé et dispositif pour desserrer un frein de stationnement - Google Patents

Procédé et dispositif pour desserrer un frein de stationnement Download PDF

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Publication number
WO2016162109A1
WO2016162109A1 PCT/EP2016/000488 EP2016000488W WO2016162109A1 WO 2016162109 A1 WO2016162109 A1 WO 2016162109A1 EP 2016000488 W EP2016000488 W EP 2016000488W WO 2016162109 A1 WO2016162109 A1 WO 2016162109A1
Authority
WO
WIPO (PCT)
Prior art keywords
parking brake
clutch
vehicle
clutch pedal
accelerator pedal
Prior art date
Application number
PCT/EP2016/000488
Other languages
German (de)
English (en)
Inventor
Kilian Förster
Daniel Geltl
Original Assignee
Audi 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 Audi Ag filed Critical Audi Ag
Publication of WO2016162109A1 publication Critical patent/WO2016162109A1/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
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B60T7/122—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger for locking of reverse movement
    • 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
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/06—Hill holder; Start aid systems on inclined road

Definitions

  • the present invention relates to a method for releasing a
  • the European document EP 2 648 948 B1 discloses a method for releasing a parking brake as a function of a torque to be expected during a starting process. In particular, this method is described below as a torque-based method for solving a
  • this method is referred to below as a clutch-based method for releasing a parking brake.
  • a method for releasing a parking brake as a function of specifications entered by a driver is disclosed in the German publication DE 199 25 249 A1. From the German document DE 102 00 783 A1 discloses a method for releasing a parking brake in response to a Anfahrrucksignals.
  • German document DE 10 2005 001 550 A1 a method for controlling a start-up assistant for a vehicle with an automatic transmission is disclosed, wherein upon activation of an operating mode for
  • Object of the present invention is a method and a
  • the presented method is used, in particular, for operating a traction aid for a vehicle, in which, depending on a starting behavior of a driver, two different methods are selected for determining a suitable time for releasing a parking brake of the vehicle.
  • the presented method is suitable for both electric and gasoline or hybrid vehicles.
  • torque-based methods based, for example, on a balance between a current downgrade force applied to the vehicle and a current drive torque of the vehicle, as well as clutch based methods based on an evaluation of a slope of a clutch path, show advantages and disadvantages in different starting situations. While torque-based methods are particularly suitable for a careful start, for example, on a slope, are
  • Parking brake come so that a drive of the vehicle extra force to overcome a through the operated parking brake
  • clutch-based method is to be distinguished from a little dynamic starting operation, which is preferably controlled by means of a torque-based method, and to dynamically select the respective preferred method for releasing the parking brake.
  • a clutch pedal waypoint in the context of the present invention means a point on a path traveled by a clutch pedal to actuate a respective power transmission unit.
  • typical Clutch pedal travel points are, for example, engaged, disengaged or a grinding point on which the power transmission unit begins to grip.
  • a clutch pedal travel point is always before a release time of a parking brake during a starting process and is fixed or determined depending on a current accelerator pedal position and / or a current slope of the clutch pedal travel.
  • the clutch pedal travel point may be set in response to a clutch slip point when appropriate learning logic is used to compensate for clutch disengagement or corresponding power transmission unit.
  • a time interval selected as a function of a clutch pedal travel point is to be understood as meaning a time window or a discrete time, which corresponds to a respective time interval
  • Clutch pedal waypoint may correspond and / or extends from or about the respective Kupplungspedalweg Vietnamese. This means that, for example, when the respective clutch pedal travel point is reached, sensor values of the driving and / or clutch pedal in the range of 500 ms before reaching the
  • Clutch pedal waypoint is selected by the clutch pedal.
  • Festellebremse continues to be released in response to a slope of a covered path of the clutch pedal.
  • a slope of the path of the clutch pedal can be used.
  • the slope of the path of the clutch pedal can be used.
  • Clutch pedals provide information on how quickly a respective driver wants to start, so that possibly even before a clutch grip detected a dynamic start-up and the parking brake is released early so as not to brake the vehicle unnecessarily when starting.
  • Vehicle generated drive torque is released.
  • a latest release time in dependence of a moment balance for determining the balance between downgrade force and drive torque a delayed release of the parking brake due to a faulty clutch-based method, d. H. a clutch travel strategy
  • the parking brake in dependence on the first method, d. H.
  • the torque-based method d. H. a Torque Transmission Strategy.
  • a slope of the Clutch pedal travel and / or a slope of an accelerator pedal travel for example.
  • Clutch pedals still a high accelerator pedal position of, for example, reported greater than 15%, can be assumed that a dynamic starting process, so that the clutch-based method for releasing the
  • the parking brake as a function of the second, eg torque-based method is solved.
  • a time course of the movement of the accelerator pedal d. H. in particular an increase, to determine and to base the decision on the choice of the respective strategy for releasing the parking brake.
  • the present invention relates to a vehicle having a control unit which is configured to release a parking brake during a starting operation of the vehicle, wherein the control unit is further configured to actuate the parking brake in dependence on an evaluation of a parking brake
  • the presented method is used in particular for the operation of the presented vehicle.
  • FIG. 1 shows a method for determining a release time of a parking brake according to a possible embodiment of the presented method.
  • FIG. 2 shows a further method for determining a
  • FIG. 3 shows a still further method for determining a
  • FIG. 4 shows a method for determining a release time of a parking brake according to a possible embodiment of the presented method in which an influence of a gas shock is excluded.
  • FIG. 5 shows a strategy for selecting a method for releasing a parking brake according to a possible embodiment of the present invention
  • FIG. 1 shows a diagram 1 which spans over a time axis 3 in [s] and a percentage scale 5 in [%].
  • Corresponding raw values for driving and clutch pedal position are determined by respective position sensors, such as. Hall sensors, and transmitted to a control unit, the
  • Position sensors detected values as described below, performs.
  • FIG. 1 shows movements of the clutch and accelerator pedal during a dynamic starting process.
  • a diagram 1 which extends over a time axis 3 in [s] and a
  • a clutch pedal travel of greater than 90% corresponds to a well-worn clutch.
  • the course 9 of the movement of the accelerator pedal increases rapidly and is within a predetermined
  • the time interval is a discrete time such that only values of the accelerator pedal at a particular time when the clutch pedal is at the 70% clutch pedal travel point are used as a basis for deciding the parking brake release strategy.
  • Movement of the accelerator pedal within the time interval formed in response to the predetermined Kupplungspedalweghuis overcomes a predetermined threshold, can be concluded on a dynamic starting and a parking brake of the vehicle are solved accordingly quickly.
  • To quickly release the parking brake and respond to the detected dynamic starting operation it is intended to release the parking brake based on a clutch based method when a dynamic starting operation is detected.
  • FIG. 2 shows movements of the clutch and accelerator pedal during a starting procedure.
  • a course 29 of a movement of an accelerator pedal initially runs dynamically and more cautiously in its further course, whereas a course 27 represents a movement of a clutch pedal, which is first released late and later in the course of time.
  • the course 29 of the movement of the accelerator pedal of the vehicle initially rises sharply and exceeds a predetermined threshold value of 15% within a predetermined time interval, as indicated by auxiliary line 31.
  • the time interval was chosen in response to a clutch pedal waypoint 34 at which the one clutch pedal of the vehicle is 30% released or 70% closed.
  • the time interval is based on values in a range of, for example, 500 ms before the clutch pedal travel point 34 to, for example, 500 ms after the clutch pedal travel point 34, so that a slope of the course 29 of the movement of the accelerator pedal of the vehicle can be calculated and interpreted.
  • the course 27 of the clutch pedal travel decreases rapidly after a plateau phase at about 100%, so that the course 27 within a predetermined Time interval falls below a predetermined threshold of 70%, as indicated by auxiliary line 33. In its course, however, the course 27 of the clutch pedal travel stagnates on a plateau, which indicates a "grinding" of the clutch or the power transmission unit and, as a result, a less dynamic starting process.
  • the corresponding starting process can be recognized as a dynamic starting process, so that the parking brake of the vehicle is based on the clutch-based method is solved.
  • the corresponding starting process can be recognized as a dynamic starting process, so that the parking brake of the vehicle is based on the clutch-based method is solved.
  • Threshold values must come, depending on, for example, an intersection of the course 29 of the movement of the accelerator pedal and the course 27 of the clutch pedal travel is adjusted. If the time interval were to be shorter, for example, the starting process shown in FIG. 2 would not be recognized as a dynamic starting process, and the parking brake would be released on the basis of a torque-based method.
  • FIG. 3 shows movements of the clutch and accelerator pedal during a cautious or non-dynamic start-up procedure.
  • the course 39 of the movement of the accelerator pedal rises very flat, so that the course 39 of the movement of the accelerator pedal within a predetermined time interval does not exceed a predetermined threshold, as indicated by auxiliary line 38. Accordingly, little thrust is generated by a drive of a corresponding vehicle. Since the course 39 of the movement of the accelerator pedal is very flat, and at a Kupplungspedalweg Vietnamese 34 of 70% does not come above a threshold of 15%, as indicated by auxiliary line 38, the corresponding starting process is to be considered cautious, ie not dynamic starting, the for releasing the parking brake of the vehicle based on the torque based method.
  • FIG. 4 shows curves of the clutch and accelerator pedal during a careful start-up procedure, in which a gas shock is generated by a driver.
  • the course 49 of the movement of the accelerator pedal initially rises very flat, so that the course 49 of the movement of the accelerator pedal within a predetermined time interval, which was selected as a function of the clutch pedal Weg Vietnameses 34 of 70%, does not exceed a predetermined threshold of 15%, as indicated by auxiliary line 46.
  • the course 49 of the movement of the accelerator pedal increases steeply, immediately after falling steeply, which corresponds to a gas shock. The gas shock would, at a long
  • the time interval to be based on the starting procedure illustrated in diagram 40 is to be selected so short that the gas impact does not lead to overcoming the
  • predetermined time interval occurs to interpret a very steep rise with a subsequent very steep drop in the course 49 of the movement of the accelerator pedal as a gas shock, not as dynamic
  • FIG. 5 schematically shows a strategy for selecting a method for releasing a parking brake.
  • a diagram 50 extends over an abscissa 51, on which a slope is plotted, and a
  • a factor for calculating a release threshold is selected for different release times i, ii and iii, which is 0.7 for the early release time ii, for the normal release time i 1, 0 and for the late release time iii 1, 3 is.
  • Dissolution time point iii Dissolution time point iii, however, the torque-based method x selected.
  • quadrant 55 for the normal release time i and a late release time iii, the torque-based method x is selected, whereas for the early release time ii the clutch-based method is selected.
  • the same procedure is used for quadrants 56 and 57.
  • the parking brake is released according to the torque-based method.

Landscapes

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

Abstract

L'invention concerne un procédé pour desserrer un frein de stationnement lors d'un processus de démarrage d'un véhicule, selon lequel le frein de stationnement est desserré en fonction d'une évaluation d'une position de la pédale d'embrayage et d'une position de la pédale d'accélérateur dans un intervalle de temps choisi en fonction d'un point prédéfini de la course de la pédale d'embrayage, soit sur la base d'un premier procédé reposant sur une évaluation d'une course de la pédale d'embrayage parcourue lors du processus de démarrage, soit sur la base d'un deuxième procédé reposant sur un couple réel du véhicule. L'invention concerne également un véhicule correspondant.
PCT/EP2016/000488 2015-04-08 2016-03-19 Procédé et dispositif pour desserrer un frein de stationnement WO2016162109A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015004610.1A DE102015004610B3 (de) 2015-04-08 2015-04-08 Verfahren und Vorrichtung zum Lösen einer Feststellbremse
DE102015004610.1 2015-04-08

Publications (1)

Publication Number Publication Date
WO2016162109A1 true WO2016162109A1 (fr) 2016-10-13

Family

ID=55274153

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/000488 WO2016162109A1 (fr) 2015-04-08 2016-03-19 Procédé et dispositif pour desserrer un frein de stationnement

Country Status (2)

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DE (1) DE102015004610B3 (fr)
WO (1) WO2016162109A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006045841A1 (fr) * 2004-10-29 2006-05-04 Continental Teves Ag & Co. Ohg Procede pour faire fonctionner un frein de stationnement actionne par une force exterieure
US7206682B2 (en) * 2001-08-07 2007-04-17 Renault S.A.S. Uphill start-up assistance device for motor vehicle
US20110287895A1 (en) * 2007-11-21 2011-11-24 Renault S.A.S. Method for assisting with hill maneuvers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19925249B4 (de) * 1999-06-01 2019-11-14 Continental Teves Ag & Co. Ohg Verfahren zur Steuerung einer Bremsanlage zur Unterstützung eines Anfahrvorganges bei einem Kraftfahrzeug
DE10200783C2 (de) * 2002-01-11 2003-12-24 Audi Ag Anfahrhilfesteuerungsvorrichtung
DE102005001550A1 (de) * 2005-01-13 2006-07-27 Zf Friedrichshafen Ag Verfahren zur Anfahrsteuerung eines Kraftfahrzeugs
DE102005052629B4 (de) * 2005-11-04 2016-08-04 Robert Bosch Gmbh Verfahren zum automatischen Lösen der Bremsen eines Fahrzeugs im optimalen Lösezeitpunkt
DE102010062498A1 (de) * 2010-12-07 2012-06-14 Robert Bosch Gmbh Verfahren zum Lösen einer Feststellbremse bei einem Anfahrvorgang

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7206682B2 (en) * 2001-08-07 2007-04-17 Renault S.A.S. Uphill start-up assistance device for motor vehicle
WO2006045841A1 (fr) * 2004-10-29 2006-05-04 Continental Teves Ag & Co. Ohg Procede pour faire fonctionner un frein de stationnement actionne par une force exterieure
US20110287895A1 (en) * 2007-11-21 2011-11-24 Renault S.A.S. Method for assisting with hill maneuvers

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