WO2008138752A1 - Fonctionnement en mode arrêt/démarrage d'un frein de stationnement - Google Patents

Fonctionnement en mode arrêt/démarrage d'un frein de stationnement Download PDF

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Publication number
WO2008138752A1
WO2008138752A1 PCT/EP2008/055285 EP2008055285W WO2008138752A1 WO 2008138752 A1 WO2008138752 A1 WO 2008138752A1 EP 2008055285 W EP2008055285 W EP 2008055285W WO 2008138752 A1 WO2008138752 A1 WO 2008138752A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
standstill
condition
parking brake
output signal
Prior art date
Application number
PCT/EP2008/055285
Other languages
German (de)
English (en)
Inventor
Johannes Bentner
Alexander Kalbeck
Original Assignee
Continental Automotive 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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2008138752A1 publication Critical patent/WO2008138752A1/fr

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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
    • 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 invention relates to an evaluation device for a vehicle, which has an electronic parking brake, as well as a vehicle, a method and a computer program product.
  • Conventional parking brakes or parking brake systems for example disc, drum or drum-in-hat brake systems, are well known from the state of the art, whereby a control force is generated manually by means of a brake lever provided in the vehicle Depending on the parking force applied to the parking brake, the parking brake generates a braking force which is transmitted to the brake mechanism unit of the parking brake Adjusting force is thus directly a predetermined braking force to the brake mechanism unit.
  • conventional parking brakes which can be controlled purely mechanically are replaced by electronically controllable parking brakes or parking brake systems, in which the generation of the actuating force required to actuate the brake mechanism is controlled via an electronic control system.
  • the parking brake is applied or released.
  • an electric motor gear unit is provided, which is connected for example with the brake mechanism via a cable system and can be controlled via the control system.
  • the electronic control signal for actuating the electronic parking brake is generated, for example, by an electronic control element provided in the vehicle, in particular a touch, rocker or switch module.
  • the electronic parking brake are controlled by a control signal generated by a control routine.
  • Electronically or motor-operated parking brakes for motor vehicles have significant advantages over previously common solutions in which the parking brakes was operated via cables via a lever on the center tunnel of the vehicle. Compared to the purely mechanical solution, they have the advantage that no handbrake lever is needed on the center console, that no long cables must be laid, requiring complex design measures and appropriate maintenance measures entail. In addition, the required space for the handbrake lever in the electronic parking brake is available for other purposes. Furthermore, electronically actuated parking brakes have the advantage that they develop a uniform effect on the brake regardless of the force exerted by the operator.
  • the invention has for its object to provide an efficient evaluation device for a vehicle with an electronic parking brake, and a corresponding method and a computer program product.
  • the at least one actuating device refers to a function different from the electronic parking brake.
  • an investigative element is available for the investigation an output signal using the condition of the determined standstill and taking into account signal values, wherein the output signal relates to a tightening the electronic parking brake of the vehicle to be performed.
  • the evaluation device serves at least ua.a. the decision as to whether the electronic parking brake should be applied or not. By means of the output signal, this separation can be passed on and thus be followed by a device for activating the parking brake.
  • the decision is based on signal values. These signal values can be determined by the evaluation device, e.g. gradually, in particular at periodically recurring points in time, are received.
  • the checking component of the evaluation device determines whether or that the vehicle is at a standstill. This can e.g. take place, in that the evaluation device receives data from sensors which are evaluated in order to decide in this way whether the vehicle is stationary or moving. Alternatively, the evaluation device can directly receive the information that the vehicle is stationary, so that the checking component determines on the basis of this evaluation that the vehicle standstill has occurred.
  • the investigative component uses the condition of the immobilized vehicle detected.
  • the standstill is therefore a condition for the electronic parking brake to be applied.
  • signal values are taken into account by the determination component.
  • These signal values indicate the actuation of one or more actuators of the vehicle.
  • one or more first signal values of a first actuating device may be present, and one or more second signal values of a second actuating device.
  • the o- or the actuator (s) is not an operating element, which is solely for the purpose the signaling of the desire of the driver to activate the parking brake is used. Rather, the actuator relates to a different function of the vehicle, such as windscreen wiper, horn, windows, driving brake, gear shift, light, turn signals.
  • the at least one actuating device comprises a gearshift.
  • the determination component can be designed to determine the output signal, taking into account a gear engaged by the driver after standstill. It can thus be e.g. be checked whether the driver has engaged in neutral or parking gear after standstill; the result of this test, if used in combination with other checks, may be decisive for activating the parking brake.
  • the at least one actuating device comprises a brake pedal of a service brake.
  • the driver can thus cause by a certain handling of this brake pedal, that after parking the vehicle, the parking brake is applied.
  • the determination component is designed to determine the output signal using a condition according to which the brake pedal is released after standstill and subsequently actuated.
  • releasing the brake pedal is meant the process of partial or maximum reduction of pedal depression.
  • the operation of the brake pedal is understood to mean the process of partially or maximally increasing the depression of the pedal.
  • the determination component is designed to determine the output signal using a condition that the brake pedal is released after a standstill for a certain period of time and subsequently actuated. According to this condition, the dissolution process must last longer than the specified period of time, or at least as long as the determined period of time.
  • the determination component is configured to determine the output signal using a condition that the brake pedal is actuated after release via an actuation threshold.
  • Actuation via an actuation threshold here means that the pedal is pressed more strongly than a certain minimum value, the minimum value corresponding to the actuation threshold value.
  • the determination component is designed to determine the output signal using a condition according to which the brake pedal is released after a standstill via a release threshold value and subsequently actuated via an actuation threshold value.
  • Solving over a release threshold means in this case that the pedal is pressed after exceeding the release threshold less than a certain value, wherein the value corresponds to the release threshold. Solving over a release threshold thus corresponds to a minimum of solution.
  • the release threshold value and / or the actuation threshold value can each be a threshold value based on past actuations of the brake pedal. This means that dynamic or variable thresholds are used in this case.
  • the determination component is designed to determine the output signal using a condition in which the brake pedal is at rest for a certain period of time after standstill Confirmation threshold is held pressed.
  • the amount of actuation may vary during the period of time; however, according to the condition, the pedal may be pressed not less than a minimum value.
  • the determination component is configured to detect the output signal using a condition that the brake pedal is released after standstill for a certain period of time, but not more than one release threshold value.
  • the determination component is designed to determine the output signal using a condition according to which the vehicle is at a standstill for a certain period of time.
  • the determination component is designed to detect the output signal using a plurality of conditions, which are e.g. are as follows and can be checked in the following order:
  • the vehicle according to the invention comprises an evaluation device of the type explained, the electronic parking brake, and an actuator for applying the electronic parking brake to the output signal.
  • an evaluation device of the type explained the electronic parking brake
  • an actuator for applying the electronic parking brake to the output signal According to the inventive method for operating a e- lektronischen parking brake is determined whether the vehicle is at a standstill. Signal values are detected which indicate an actuation of at least one actuation device of the vehicle by the driver, wherein the at least one actuation device relates to a function different from the electronic parking brake. Finally, it is determined whether the electronic parking brake is to be applied, wherein the determination is made using the condition of the determined standstill and taking into account signal values.
  • the computer program product for a vehicle with an electronic parking brake comprises the functionality of a checking component for determining whether the vehicle is at a standstill and an input for receiving signal values indicating an actuation of at least one actuating device of the vehicle by the driver.
  • the at least one actuating device relates to a function different from the electronic parking brake.
  • the functionality of a determining component is provided for determining an output signal using the condition of the determined standstill and taking into account signal values, wherein the output signal concerns a tightening of the electronic parking brake of the vehicle.
  • a computer program product may, in addition to the actual computer program (with its technical effect beyond the normal physical interaction between the program and the arithmetic unit) comprise in particular a record carrier for the computer program, a file library, a configured arithmetic unit but also, for example, a memory device or a server on which the files belonging to the computer program stored are understood.
  • the computer program product according to the invention and the method according to the invention are particularly suitable for the evaluation device according to the invention, and this may also apply to the refinements and developments. For this purpose, they can comprise further suitable means or steps.
  • FIG. 1 a motor vehicle
  • FIG. 2 a first flowchart
  • FIG. 3 a second flowchart.
  • Figure 1 shows schematically a motor vehicle F, which has a brake pedal P, the operating state is detected in a known per se.
  • the brake pedal value may e.g. be determined by a position signal generator, the brake pressure of the master cylinder or on the basis of the braking force of the wheels.
  • the detected signal values SIG are sent to the evaluation device A via a suitable connection, e.g. a CAN bus provided.
  • the vehicle has an electronic parking brake system PB. It can be provided for each wheel of the motor vehicle F own parking brake PB, or even just a parking brake PB for the motor vehicle F.
  • two parking brakes PB are shown in Figure 1.
  • the signal values SIG can assume values between 0 and 100%, 0% corresponding to the unpressed state of the pedal P. If the signal value SIG is below a certain value or if the brake pedal P is actuated below a certain value, this means that the pedal P is pressed less than would correspond to the determined value; if the signal value SIG is above a certain value or if the brake pedal P is actuated above a certain value, this means that that the pedal P is pressed more than it would correspond to the determined value.
  • the signal is in the form of discrete, in particular digitized, values.
  • the vehicle F has a gearshift S.
  • This may be a shift lever, which can be actuated by the driver, of a manual or an automatic transmission.
  • Information about the gear selected by the driver through the gear shift S are provided to the evaluation device A in the form of signals SIG available.
  • the evaluation device A evaluates at least u.a. the signals SIG and decides on the basis of this evaluation, whether the non-applied parking brake PB due to a certain actuation of the brake pedal P and / or the gear shift S is to be activated. If such a decision has been made, the evaluation device A with the request REQ actuators instructs to apply the parking brake PB.
  • the parking brake is automatically, i. without the driver initiating this specifically, activated when the vehicle is at rest, i. tightened or inserted.
  • the stoppage of the vehicle may e.g. be detected by the tire rotation, possibly in combination with acceleration sensors.
  • a subsequent approach is detected and the parking brake is automatically, i. again without the driver initiating this, solved.
  • a problem with electronic parking brake systems with stop-and-go operation is the lifetime limit with respect to the maximum number of tightening operations. Accordingly, a stop and go functionality that activates the parking brake at each standstill dramatically reduces the life of the electronic parking brake system.
  • another condition or several further conditions is checked after the detection of the standstill on the basis of the signals SIG. The aim of this procedure is to detect a prolonged vehicle standstill and to activate the parking brake only in the event of an extended vehicle standstill. If the condition (s) apply, the parking brake is applied.
  • eight possible conditions are explained. These can each be considered individually or used in any combination with each other.
  • variable first threshold can be determined as follows: last maximum signal value minus a fixed difference value.
  • the last maximum signal value is determined in such a way that it remains continuously at the current signal value in the case of a positive gradient, ie increasing actuation, and remains unchanged in the case of a negative gradient, ie when the pedal is released.
  • a filtering of the signal values for smoothing can be used here.
  • the variable second threshold can be determined as follows: last minimum signal value plus a fixed difference value.
  • the last minimum signal value is determined to be negative for a negative gradient, i. E. when the pedal is released, continuously set to the current signal value, and at a positive gradient, i. increasing activity, remains unchanged.
  • a filtering of the signal values for smoothing can be used here.
  • Figure 2 shows a flow chart in which the conditions 1 to 7 are checked. This is done in such a way that for activating the parking brake the conditions 2 or 3, or each of the conditions 1, 4 or 6, 5, 7 must be met.
  • step S & G it is determined that the stop-and-go operation of the vehicle is activated.
  • the Stop and Go functionality can be activated via a control panel by the driver or a diagnostic unit from a workshop.
  • the activation state can optionally be stored in a control unit.
  • At the beginning of the query no. 11 is checked whether the vehicle has come to a standstill. If this is not true, it is returned to the beginning according to the branch N. If the stoppage of the vehicle has been detected, proceed according to branch Y with query no.
  • step APP PB it is checked whether the neutral gear is engaged or the clutch is operated when the gear is engaged, and whether the neutral gear or the parking position has been engaged on a vehicle with an automatic transmission. This corresponds to conditions 2 and 3. If so, it is decided in step APP PB to activate the parking brake according to branch Y. On the other hand, if this is not the case, the query N 13 is continued according to branch N.
  • step # 13 it is checked whether the brake pedal has been released after standstill below a certain threshold. This corresponds to the first criterion of condition 5; furthermore, this corresponds to the first criterion of condition 4 or 6, depending on whether a fixed or variable threshold is used. If so, branch no. 14 is continued according to branch Y. Meets on the other hand, if this is not the case, then the branch N is returned to the beginning.
  • inquiry no. 14 it is checked whether the release of the brake pedal after standstill has been carried out for a certain minimum period of time. This corresponds to the second criterion of condition 5. If this is the case, then branch no. 15 is continued according to branch Y. On the other hand, if this is not true, branch N is returned to the beginning according to branch N.
  • Query # 15 checks to see if the brake pedal has been depressed above a certain threshold. This corresponds to the further criteria and thus the complete conditions 5, as well as 4 or 6, and the first criterion of the condition 7. If this is the case, then the inquiry No. 15 is continued according to the branch Y. On the other hand, if this is not true, branch N is returned to the beginning according to branch N.
  • inquiry no. 16 it is checked whether the brake pedal has been kept above the threshold value of query no. 15 for a certain time and, in addition, whether the vehicle has already been at a standstill for a certain time.
  • the former corresponds to the second criterion and thus to the complete condition 7; second corresponds to the condition 1. If this is not true, then the branch N is returned to the beginning again.
  • branch Y is selected in step APP PB, it is decided to activate the parking brake. After the parking brake has been activated, stop and go operation is interrupted in step EX S & G until the vehicle moves again or the driver presses the accelerator pedal again. In this case, do not check whether the parking brake can be released.
  • FIG. 3 shows a flowchart in which conditions 2, 3 and 8 are checked. This is done in the way that for activating the parking brake conditions 2 or 3, or the condition 8 must be met.
  • step S & G it is determined that the stop-and-go operation of the vehicle is activated. Reference is made to the comments on Figure 2.
  • the query No. 21 is checked whether the vehicle has come to a standstill. If this is not true, it is returned to the beginning according to the branch N. If the stoppage of the vehicle has been detected, proceed according to branch Y with query No. 22.
  • step APP PB in a manual transmission vehicle, it is checked whether the neutral gear is engaged or the clutch is engaged when the gear is engaged, and whether the neutral gear or the parking position has been engaged on a vehicle with an automatic transmission. This corresponds to conditions 2 and 3. If so, it is decided in step APP PB to activate the parking brake according to branch Y. On the other hand, if this is not the case, the query N 23 is continued according to branch N.
  • inquiry no. 23 it is checked whether the brake pedal is released after standstill. This corresponds to the first criterion of condition 8. If so, branch no. 24 is continued according to branch Y. On the other hand, if this is not true, branch N is returned to the beginning according to branch N.
  • Query no. 24 checks whether the release process has stopped for a certain period of time. This corresponds to the second criterion of condition 8. If this is the case, the process continues according to branch Y with query no. On the other hand, if this is not true, branch N is returned to the beginning according to branch N.
  • Query # 25 checks to see if the signal is above a certain threshold despite being released. This matches with the last criterion and thus the complete condition 8. If this is not true, then according to the branch N in step EX S & G the stop and go operation is interrupted until the vehicle moves again or the driver presses the accelerator pedal again. If this is true, on the other hand, according to the branch Y, it is decided in the step APP PB to activate the parking brake. After activating the parking brake, the stop and go operation is interrupted according to the branch N in step EX S & G until the vehicle moves again or the driver operates the gas pedal again. In this case, do not check whether the parking brake can be released.
  • the parking brake is thus not activated at every vehicle standstill. Furthermore, the parking brake is not activated at every vehicle standstill, which lasts for a certain time. Rather, the behavior of the driver is observed to decide whether the parking brake should be applied. Thus, the driver can influence by the type of operation of the brake pedal and / or gear shift, whether the parking brake is to be automatically tightened in a vehicle standstill. Automatic here means that the driver does not have to operate a specially provided for the parking brake control.
  • An advantage of the procedures described is that from the consideration of conditions related to the driver behavior a reduced number of activations of the parking brake in the context of the stop-on Go operation result, the number of cycles is thus reduced. This significantly increases the service life of the system compared to systems that generally activate the parking brake when the vehicle is stationary. Furthermore, the driver's acceptance is increased, because the parking brake is automatically activated to a lesser extent in cases where this is undesirable to the driver and thus perceived as annoying.

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

Abstract

L'invention concerne une unité d'évaluation (A) destinée à un véhicule (F) présentant un frein de stationnement électronique (PB). L'unité d'évaluation (A) comporte un composant de contrôle destiné à déterminer si le véhicule (F) se trouve à l'arrêt, et une entrée destinée à recevoir des valeurs de signal (SIG) indiquant un actionnement d'au moins un dispositif d'actionnement (S, P) du véhicule (F) par le conducteur, le ou les dispositifs d'actionnement (S, P) se rapportant à une fonction différente de celle du frein de stationnement électronique (PB). L'unité d'évaluation (A) comporte également un composant de détermination destiné à déterminer un signal de sortie (REQ) au moyen de la condition de détection de l'arrêt et avec prise en compte de valeurs de signal (SIG), le signal de sortie (REQ) concernant la réalisation du serrage du frein de stationnement électronique (PB) du véhicule (F). L'invention concerne également un véhicule (F), un procédé et un produit de programme informatique.
PCT/EP2008/055285 2007-05-09 2008-04-29 Fonctionnement en mode arrêt/démarrage d'un frein de stationnement WO2008138752A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710021739 DE102007021739A1 (de) 2007-05-09 2007-05-09 Stop and Go Betrieb einer elektronischen Parkbremse
DE102007021739.2 2007-05-09

Publications (1)

Publication Number Publication Date
WO2008138752A1 true WO2008138752A1 (fr) 2008-11-20

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Application Number Title Priority Date Filing Date
PCT/EP2008/055285 WO2008138752A1 (fr) 2007-05-09 2008-04-29 Fonctionnement en mode arrêt/démarrage d'un frein de stationnement

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WO (1) WO2008138752A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20090803A1 (it) * 2009-10-22 2011-04-23 Cnh Italia Spa Veicolo
DE102012010841A1 (de) * 2012-06-01 2013-12-05 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Verfahren zum Betreiben eines Kraftfahrzeugs

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4629043A (en) * 1983-01-31 1986-12-16 Mazda Motor Corporation Electric parking brake system for a vehicle
DE19611359C1 (de) * 1996-03-22 1997-08-28 Daimler Benz Ag Verfahren zum Verhindern unbeabsichtigten Wegrollens eines Fahrzeugs
DE19826687A1 (de) * 1998-06-16 1999-12-23 Continental Teves Ag & Co Ohg Elektrisch betätigbares Bremssystem für Kraftfahrzeuge und Verfahren zu seiner Ansteuerung
DE19849799A1 (de) * 1998-10-29 2000-06-08 Volkswagen Ag Verfahren zum Einstellen eines Bremsdruckes bei einem Kraftfahrzeug
EP1048538A2 (fr) * 1999-04-30 2000-11-02 DaimlerChrysler AG Système de contrôle avec freinage automatique pour un véhicule
DE10357121A1 (de) * 2003-12-06 2005-07-07 Daimlerchrysler Ag Verfahren zum Schließen einer Feststellbremse
DE102005018422A1 (de) * 2004-07-02 2006-02-02 Continental Teves Ag & Co. Ohg Verfahren zum Betrieb einer Bremsanlage für Kraftfahrzeuge
DE102005043607A1 (de) * 2005-09-06 2007-03-15 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Verfahren zum Steuern einer elektrischen Feststellbremse eines Nutzfahrzeugs

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4664749B2 (ja) * 2005-06-28 2011-04-06 本田技研工業株式会社 車両用ブレーキ装置
DE102005048338A1 (de) * 2005-10-10 2007-04-12 Robert Bosch Gmbh Geschwindigkeits- und Abstandsregler für Kraftfahrzeuge

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4629043A (en) * 1983-01-31 1986-12-16 Mazda Motor Corporation Electric parking brake system for a vehicle
DE19611359C1 (de) * 1996-03-22 1997-08-28 Daimler Benz Ag Verfahren zum Verhindern unbeabsichtigten Wegrollens eines Fahrzeugs
DE19826687A1 (de) * 1998-06-16 1999-12-23 Continental Teves Ag & Co Ohg Elektrisch betätigbares Bremssystem für Kraftfahrzeuge und Verfahren zu seiner Ansteuerung
DE19849799A1 (de) * 1998-10-29 2000-06-08 Volkswagen Ag Verfahren zum Einstellen eines Bremsdruckes bei einem Kraftfahrzeug
EP1048538A2 (fr) * 1999-04-30 2000-11-02 DaimlerChrysler AG Système de contrôle avec freinage automatique pour un véhicule
DE10357121A1 (de) * 2003-12-06 2005-07-07 Daimlerchrysler Ag Verfahren zum Schließen einer Feststellbremse
DE102005018422A1 (de) * 2004-07-02 2006-02-02 Continental Teves Ag & Co. Ohg Verfahren zum Betrieb einer Bremsanlage für Kraftfahrzeuge
DE102005043607A1 (de) * 2005-09-06 2007-03-15 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Verfahren zum Steuern einer elektrischen Feststellbremse eines Nutzfahrzeugs

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