DE102004032717A1 - Method for testing of function of electrically operated parking brake, comprising check with slightly reduced pressure - Google Patents
Method for testing of function of electrically operated parking brake, comprising check with slightly reduced pressure Download PDFInfo
- Publication number
- DE102004032717A1 DE102004032717A1 DE102004032717A DE102004032717A DE102004032717A1 DE 102004032717 A1 DE102004032717 A1 DE 102004032717A1 DE 102004032717 A DE102004032717 A DE 102004032717A DE 102004032717 A DE102004032717 A DE 102004032717A DE 102004032717 A1 DE102004032717 A1 DE 102004032717A1
- Authority
- DE
- Germany
- Prior art keywords
- brake
- parking brake
- locking
- locking device
- pressure
- 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.)
- Granted
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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
- B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
-
- 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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/08—Brake cylinders other than ultimate actuators
- B60T17/16—Locking of brake cylinders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/045—Brake-action initiating means for personal initiation foot actuated with locking and release means, e.g. providing parking brake application
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Überprüfung der Funktionsfähigkeit einer elektrisch betätigten Feststellbremse gemäß dem Oberbegriff des Patentanspruchs 1, sowie eine entsprechende Vorrichtung gemäß dem Oberbegriff des Patentanspruchs 5.The The invention relates to a method for checking the functionality an electrically operated Parking brake according to the preamble of claim 1, and a corresponding device according to the preamble of claim 5.
Moderne Fahrzeuge werden immer häufiger mit elektrisch betätigten Feststellbremsen ausgestattet, die auch als automatische Parkbremsen (APB) bezeichnet werden. Derartige Systeme umfassen in der Regel ein Bedienelement, wie z.B. einen Druckknopf, mit dem dem Feststellbremse verriegelt und/oder gelöst werden kann. Ein mit dem Bedienelement verbundenes Steuergerät erkennt den Feststellbremswunsch und steuert entsprechend ein Stellglied, wie z.B. einen Elektromotor oder eine Hydraulikpumpe, an, um die Feststellbremse zu verriegeln oder zu lösen.modern Vehicles are becoming more common electrically operated Parking brakes are also equipped as automatic parking brakes (APB). Such systems usually include an operating element, such as e.g. a push button with which the parking brake locked and / or solved can be. A connected to the control unit detects control the parking brake request and accordingly controls an actuator, such as. an electric motor or a hydraulic pump, on to the Lock or release the parking brake.
Bekannte Feststellbremsen umfassen neben der eigentlichen Radbremse auch eine mechanische Verriegelungseinrichtung, die die Bremszangen in der angezogenen Stellung verriegelt. Die Verriegelungseinrichtung wird in der Regel ebenfalls durch hydraulischen oder pneumatischen Druck betätigt oder motorisch verriegelt. Hierzu werden z.B. eine Hydraulikpumpe und Magnetventile oder ein Elektromotor entsprechend angesteuert.Known Parking brakes also include in addition to the actual wheel brake a mechanical locking device, the brake calipers in the locked position tightened. The locking device is usually also by hydraulic or pneumatic pressure pressed or motor locked. For this, e.g. a hydraulic pump and Solenoid valves or an electric motor driven accordingly.
Zum
Verriegeln der Feststellbremse
Moderne automatisierte Feststellbremsen bieten für den Fahrer einen deutlichen Komfort- und Sicherheitsgewinn, da sie durch einen einfachen Knopfdruck bedient werden können. Allein die Bedienung der Feststellbremse lässt den Fahrer jedoch nicht erkennen, ob die Feststellbremse ordnungsgemäß funktioniert hat. Dabei ist insbesondere nicht erkennbar, ob die Feststellbremse mit ausreichender Kraft verriegelt wurde. Bekannte Feststellbremssysteme umfassen daher einen an der Bremszange angeordneten Kraftsensor, um die Klemmkraft der Bremse zu überwachen. Derartige Sensoren sind zum einen relativ teuer und zum anderen aufwändig zu montieren.modern automated parking brakes provide a clear for the driver Comfort and safety gain, as they by a simple push of a button can be operated. However, the operation of the parking brake does not leave the driver Detect if the parking brake has worked properly. It is in particular, not detectable, whether the parking brake with sufficient force was locked. Known parking brake systems therefore include an arranged on the brake caliper force sensor to the clamping force to monitor the brake. Such sensors are on the one hand relatively expensive and on the other hand consuming too assemble.
Es ist daher die Aufgabe der vorliegenden Erfindung, ein Verfahren sowie eine Vorrichtung zur Überprüfung der Funktionsfähigkeit einer elektrisch betätigten Feststellbremse zu schaffen, die wesentlich einfacher aufgebaut und kostengünstiger ist.It is therefore the object of the present invention, a method and a device for checking the functionality an electrically operated To provide parking brake, which is much simpler and cheaper is.
Gelöst wird diese Aufgabe gemäß der Erfindung durch die im Patentanspruch 1 sowie in Patentanspruch 5 angegebenen Merkmale. Weitere Ausgestaltungen der Erfindung sind Gegenstand von Unteransprüchen.Is solved this task according to the invention by the specified in claim 1 and in claim 5 Characteristics. Further embodiments of the invention are the subject of dependent claims.
Ein wesentlicher Gedanke der Erfindung besteht darin, den Bremsdruck nach einer Verriegelung der Feststellbremse nur geringfügig zu reduzieren und danach zu versuchen, die Verriegelungseinrichtung zu lösen. Herkömmliche Feststellbremsen sind derart konstruiert, dass sich die Verriegelungseinrichtung nur bei einem Bremsdruck wieder lösen lässt, der etwa dem maximalen Bremsdruck beim Verriegeln der Bremse entspricht. Andernfalls wird die Verriegelungseinrichtung vom Bremskolben eingeklemmt und kann nicht gelöst werden. Ist es dagegen möglich, die Verriegelungseinrichtung bei reduziertem Bremsdruck zu lösen, weist dies darauf hin, dass die Verriegelungseinrichtung nicht oder zu schwach verriegelt war. Somit kann festgestellt werden, ob die Feststellbremse ausreichend stark verriegelt ist.One essential idea of the invention is the brake pressure to reduce only slightly after locking the parking brake and then try to release the locking device. conventional Parking brakes are designed so that the locking device only at a brake pressure can solve again, about the maximum Brake pressure when locking the brake corresponds. Otherwise it will the locking device is clamped by the brake piston and can unsolved become. Is it possible, to release the locking device with reduced brake pressure points this indicates that the locking device is not or too was weakly locked. Thus it can be determined if the parking brake is sufficiently strong locked.
Der Bremsdruck wird nach dem Verriegeln der Feststellbremse vorzugsweise zwischen 5% und 20%, insbesondere um etwa 10% gegenüber dem maximalen Druck reduziert. Bei einer ordnungsgemäß verriegelten Feststellbremse ist es bereits bei etwa 90% des maximalen Bremsdrucks nicht mehr möglich, die Verriegelungseinrichtung zu lösen, da sie durch den Bremskolben eingeklemmt wird.Of the Brake pressure is preferably after locking the parking brake between 5% and 20%, in particular about 10% above the maximum Reduced pressure. With a properly locked parking brake it is already at about 90% of the maximum brake pressure is no longer possible, the To release locking device, because it is pinched by the brake piston.
Um die Position der Verriegelungseinrichtung festzustellen, kann ein Sensor, wie z.B. ein Endlagenschalter, eingesetzt werden. Vorzugsweise wird jedoch das Auslaufverhalten des Pumpenmotors des Hydroaggregats ausgewertet, um den Verriegelungszustand der Feststellbremse zu ermitteln. Bei verriegelter Bremse wird der Pumpenmotor nach dem Abschalten relativ stark gebremst, da das Bremssystem vorgespannt und unelastisch ist. Bei nicht verriegelter Bremse (d.h. die Verriegelungseinrichtung befindet sich in der gelösten Position) läuft der Pumpenmotor etwas länger aus, da der Hydraulikdruck gering und das Bremssystem elastisch ist.To determine the position of the locking device, a sensor, such as an end position switches are used. Preferably, however, the discharge behavior of the pump motor of the hydraulic unit is evaluated in order to determine the locking state of the parking brake. When the brake is locked, the pump motor is relatively braked after switching off because the brake system is biased and inelastic. When the brake is not locked (ie the locking device is in the released position), the pump motor runs a little longer, because the hydraulic pressure is low and the brake system is elastic.
Die einzelnen Verfahrensschritte zur Überprüfung der Feststellbremse, insbesondere die Ansteuerung der Hydraulikeinheit und der Verriegelungseinrichtung, werden vorzugsweise von einem Steuergerät durchgeführt.The individual process steps for checking the parking brake, in particular the control of the hydraulic unit and the locking device, are preferably performed by a controller.
Bei einer fehlerhaften Verriegelung der Feststellbremse wird vorzugsweise ein Fehlersignal erzeugt und der Fahrer gewarnt. Hierzu ist vorzugsweise eine Einrichtung vorgesehen, die den Fahrer optisch oder akustisch auf den Fehler hinweist.at a faulty locking of the parking brake is preferably An error signal is generated and the driver is warned. This is preferred a device is provided which visually or acoustically the driver indicates the error.
Eine Vorrichtung zur Überprüfung der Funktionsfähigkeit einer elektrisch betätigten Feststellbremse umfasst neben den bekannten Komponenten einer Feststellbremse ein Steuergerät, das zur Durchführung der vorstehend genannten Verfahrensschritte programmtechnisch eingerichtet ist.A Device for checking the operability an electrically operated Parking brake includes in addition to the known components of a parking brake a control unit, that to carry out the above method steps program-technically set up is.
Die Erfindung wird nachstehend anhand der beigefügten Zeichnungen beispielhaft näher erläutert. Es zeigen:The Invention will be exemplified below with reference to the accompanying drawings explained in more detail. It demonstrate:
Bezüglich der
Erläuterung
von
Um
einen derartigen Verriegelungsfehler erkennen zu können, wird
nun das in
Bei
normaler Verriegelung, d.h. der Keil
Die
Die
fehlerhafte Verriegelung kann wiederum durch das in
Die
Der
Bremsdruck P wird zunächst
auf einen maximalen Wert (1000 aufgebaut und dabei die Verriegelungseinrichtung
Bei fehlerhafter Verriegelung kann beispielsweise automatisch ein zweiter Verriegelungsversuch gestartet werden.at incorrect locking, for example, a second automatically Lock attempt to be started.
- 11
- Fuß-BremspedalFoot brake pedal
- 22
- BremskraftverstärkerBrake booster
- 33
- BremsflüssigkeitsbehälterBrake fluid reservoir
- 44
- HauptbremszylinderMaster Cylinder
- 55
- Umschaltventilswitching valve
- 66
- Hydraulikeinheithydraulic unit
- 77
- Steuergerätcontrol unit
- 88th
- Bedienelementoperating element
- 99
- Batteriebattery
- 1010
- Hydraulikleitunghydraulic line
- 1111
- Bremssattel-VentilCaliper valve
- 1212
- Radbremsewheel brake
- 1313
- Verriegelungseinrichtunglocking device
- 1414
- Bremsscheibebrake disc
- l5l5
- Drucksensorpressure sensor
- 1616
- Anzeigeeinrichtungdisplay
- 1717
- Bremskolbenbrake pistons
- 1818
- Bremsbelagbrake lining
- 1919
- BremssattelgehäuseCaliper housing
- 2020
- Verriegelungskeillocking wedge
- 2121
- Luftspaltair gap
- 2222
- Elektrischer Antriebelectrical drive
- 2323
- Elektromotorelectric motor
- 2424
- Gewindehülsethreaded sleeve
- 2525
- Gewindespindelscrew
- 2626
- EndlagenschalterLimit switches
- 30-3430-34
- Verfahrensschrittesteps
- pp
- Bremsdruckbrake pressure
- ss
- zurückgelegter Wegdistance covered path
- tt
- ZeitTime
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004032717.3A DE102004032717B4 (en) | 2004-07-07 | 2004-07-07 | Sensorless monitoring of an electrically operated parking brake |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004032717.3A DE102004032717B4 (en) | 2004-07-07 | 2004-07-07 | Sensorless monitoring of an electrically operated parking brake |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102004032717A1 true DE102004032717A1 (en) | 2006-02-09 |
DE102004032717B4 DE102004032717B4 (en) | 2017-03-23 |
Family
ID=35612732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102004032717.3A Expired - Fee Related DE102004032717B4 (en) | 2004-07-07 | 2004-07-07 | Sensorless monitoring of an electrically operated parking brake |
Country Status (1)
Country | Link |
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DE (1) | DE102004032717B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004038745B4 (en) | 2004-08-10 | 2018-08-16 | Robert Bosch Gmbh | Method and device for checking the locking state of a parking brake |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19502927A1 (en) * | 1995-01-31 | 1996-08-01 | Teves Gmbh Alfred | Combined service and parking brake |
DE19620344A1 (en) * | 1996-02-09 | 1997-08-14 | Teves Gmbh Alfred | Combined service and parking brake system |
-
2004
- 2004-07-07 DE DE102004032717.3A patent/DE102004032717B4/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004038745B4 (en) | 2004-08-10 | 2018-08-16 | Robert Bosch Gmbh | Method and device for checking the locking state of a parking brake |
Also Published As
Publication number | Publication date |
---|---|
DE102004032717B4 (en) | 2017-03-23 |
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