WO2007057415A1 - Method for determining an admission pressure in a motor vehicle brake unit - Google Patents

Method for determining an admission pressure in a motor vehicle brake unit Download PDF

Info

Publication number
WO2007057415A1
WO2007057415A1 PCT/EP2006/068504 EP2006068504W WO2007057415A1 WO 2007057415 A1 WO2007057415 A1 WO 2007057415A1 EP 2006068504 W EP2006068504 W EP 2006068504W WO 2007057415 A1 WO2007057415 A1 WO 2007057415A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
motor vehicle
brake system
pressure
current
Prior art date
Application number
PCT/EP2006/068504
Other languages
German (de)
French (fr)
Inventor
Rüdiger BRIESEWITZ
Original Assignee
Continental Teves Ag & 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 & Co. Ohg filed Critical Continental Teves Ag & Co. Ohg
Publication of WO2007057415A1 publication Critical patent/WO2007057415A1/en

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
    • B60T8/34—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 having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—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 having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/404—Control of the pump unit
    • B60T8/4059—Control of the pump unit involving the rate of delivery
    • 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
    • B60T8/34—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 having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—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 having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system

Definitions

  • the invention relates to a method for determining a form in a motor vehicle brake system according to the O-berbegriff of claim 1 and a pressure control device for carrying out the method.
  • ABS anti-lock braking systems
  • ESP driving stability regulations
  • a method for estimating a prevailing between a master cylinder and an intake valve of a wheel brake cylinder of a motor vehicle brake pre-pressure of a clocked motor of a pump, which for the return promotion of brake fluid from an output side of the wheel brake cylinder arranged storage chamber is used in the master cylinder, and used in the storage chamber determined or measured storage chamber pressure.
  • the object of the invention is to provide a method with which the form can be determined in a simple manner without the use of a pressure sensor.
  • the invention is based on the idea of evaluating the motor current of a pump starting against the admission pressure to be determined. For this purpose, at least a short voltage pulse is applied to the clocked, in particular by pulse width modulation (PWM), operated motor of the return pump, and it is considered the starting flow on the engine.
  • PWM pulse width modulation
  • the pump is not or only slightly set in motion by the application of a voltage pulse to the motor.
  • the movable part of the periodically operating motor in particular the rotor in a direct current motor, by a maximum of two periods (revolutions), in particular by a maximum of one period, more preferably by a maximum of half a period and most preferably by a maximum of one quarter period, moving.
  • the advantage achieved with the invention lies in the ability to dispense with a pressure sensor for measuring the form.
  • a working according to the invention brake pressure control device is cheaper, since the pressure sensor is omitted.
  • FIG. 1 shows an example of a hydraulic circuit diagram of a slip-controlled motor vehicle brake system 1, which does not include a pressure sensor for measuring the admission pressure.
  • a driving stability control e.g., ESP brake control
  • the admission pressure must be determined in another way in order to ensure the functionality of the electronic brake system.
  • the admission pressure is determined by the pump motor 5 being pulsed with a short voltage pulse.
  • the pump 4 wants to start against the form of the master cylinder 2.
  • the Torque is proportional to the current consumed by the motor. From a stored calibration database can be closed by the current on the form.
  • the sampling frequency of the current response must be high enough and the inertia of the motor-pump unit must be dimensioned accordingly.
  • the pump does not have to be set in motion, but it is sufficient if, within a relevant pressure range, e.g. 0-300 bar, the correlation of voltage pulse duration and current response is ensured.
  • the motor current is proportional to the torque on the motor shaft, which in turn is proportional to the pending on the pump piston pressure.

Abstract

The invention relates to a method for determining an admission pressure prevailing between a master brake cylinder (2) and an intake valve of a wheel brake cylinder of a motor vehicle brake unit having an electronic brake system, wherein the motor current of a motor (5), which is operated in a clocked fashion, of a pump (4) for delivering brake fluid is incorporated by virtue of the current being measured on start-up after the application of at least one voltage pulse across the motor (5).

Description

Verfahren zur Bestimmung eines Vordrucks bei einer Kraftfahrzeug-BremsanlageMethod for determining a pre-pressure in a motor vehicle brake system
Die Erfindung betrifft ein Verfahren zur Bestimmung eines Vordrucks bei einer Kraftfahrzeug-Bremsanlage gemäß dem O- berbegriff des Anspruchs 1 sowie eine Druckregelvorrichtung zur Durchführung des Verfahrens.The invention relates to a method for determining a form in a motor vehicle brake system according to the O-berbegriff of claim 1 and a pressure control device for carrying out the method.
Zum optimalen Einsatz von elektronischen Bremssystemen, insbesondere von Antiblockiersystemen (ABS) und Fahrstabili- tätsregelungen (z.B. ESP), ist es vorteilhaft, die Ansteuerung der einem Radbremszylinder jeweils zugeordneten Ein- und Auslassventile unter Berücksichtigung des so genannten Vordrucks, d.h. des Drucks zwischen dem Hauptbremszylinder und dem Einlassventil, durchzuführen. Es ist möglich, diesen Druck mittels eines Drucksensors zu erfassen, wobei zu diesem Zweck einsetzbare Sensoren jedoch sehr teuer sind.For optimum use of electronic braking systems, in particular anti-lock braking systems (ABS) and driving stability regulations (for example ESP), it is advantageous to control the inlet and outlet valves associated with a wheel brake cylinder taking into account the so-called pre-pressure, i. the pressure between the master cylinder and the intake valve to perform. It is possible to detect this pressure by means of a pressure sensor, but sensors usable for this purpose are very expensive.
Aus der DE 199 46 777 Al ist ein Verfahren bekannt, welches zur Abschätzung eines zwischen einem Hauptbremszylinder und einem Einlassventil eines Radbremszylinders einer Kraftfahrzeug-Bremsanlage herrschenden Vordrucks die NachlaufSpannung eines getaktet betriebenen Motors einer Pumpe, welche zur Rückförderung von Bremsflüssigkeit aus einer ausgangsseitig von dem Radbremszylinder angeordneten Speicherkammer in den Hauptbremszylinder verwendet wird, und den in der Speicherkammer ermittelten oder gemessenen Speicherkammerdruck verwendet . Aufgabe der Erfindung ist es, ein Verfahren zur Verfügung zu stellen, mit dem der Vordruck in einfacher Weise ohne Verwendung eines Drucksensors bestimmbar ist.From DE 199 46 777 Al a method is known, which for estimating a prevailing between a master cylinder and an intake valve of a wheel brake cylinder of a motor vehicle brake pre-pressure of a clocked motor of a pump, which for the return promotion of brake fluid from an output side of the wheel brake cylinder arranged storage chamber is used in the master cylinder, and used in the storage chamber determined or measured storage chamber pressure. The object of the invention is to provide a method with which the form can be determined in a simple manner without the use of a pressure sensor.
Diese Aufgabe wird erfindungsgemäß durch das Verfahren gemäß Anspruch 1 gelöst.This object is achieved by the method according to claim 1.
Die Erfindung geht dabei von der Idee aus, den Motorstrom einer gegen den zu bestimmenden Vordruck anlaufenden Pumpe auszuwerten. Dazu wird mindestens ein kurzer Spannungspuls an den getaktet, insbesondere durch Pulsweiten Modulation (PWM) , betriebenen Motor der Rückförderpumpe angelegt, und es wird der Anlaufström am Motor betrachtet.The invention is based on the idea of evaluating the motor current of a pump starting against the admission pressure to be determined. For this purpose, at least a short voltage pulse is applied to the clocked, in particular by pulse width modulation (PWM), operated motor of the return pump, and it is considered the starting flow on the engine.
Insbesondere ist es bevorzugt, dass die Pumpe durch das Anlegen eines Spannungspulses an den Motor nicht oder nur wenig in Bewegung gesetzt wird. Das bedeutet, dass der bewegliche Teil des periodisch arbeitenden Motors, insbesondere der Rotor bei einem Gleichstom-Motor, sich um maximal zwei Perioden (Umdrehungen) , insbesondere um maximal eine Periode, besonders bevorzugt um maximal eine halbe Periode und ganz besonders bevorzugt um maximal eine viertel Periode, bewegt .In particular, it is preferred that the pump is not or only slightly set in motion by the application of a voltage pulse to the motor. This means that the movable part of the periodically operating motor, in particular the rotor in a direct current motor, by a maximum of two periods (revolutions), in particular by a maximum of one period, more preferably by a maximum of half a period and most preferably by a maximum of one quarter period, moving.
Der mit der Erfindung erzielte Vorteil liegt in der Möglichkeit, auf einen Drucksensor zur Messung des Vordruckes zu verzichten. Damit wird eine nach dem erfindungsgemäßen Verfahren arbeitende Bremsdruckregelvorrichtung kostengünstiger, da der Drucksensor entfällt. Außerdem ist keine Ansteuerung (hydraulisch wie elektronisch) eines separaten Druck- sensors nötig.The advantage achieved with the invention lies in the ability to dispense with a pressure sensor for measuring the form. Thus, a working according to the invention brake pressure control device is cheaper, since the pressure sensor is omitted. In addition, no activation (hydraulic or electronic) of a separate pressure sensors needed.
Weitere bevorzugte Ausführungsformen ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung eines Ausführungsbeispiels an Hand einer Figur.Further preferred embodiments will become apparent from the subclaims and the following description of an embodiment with reference to a figure.
Aus der Fig. 1 geht exemplarisch ein hydraulischer Schaltplan einer schlupfgeregelten Kraftfahrzeugbremsanlage 1 hervor, welche keinen Drucksensor zur Messung des Vordrucks um- fasst .FIG. 1 shows an example of a hydraulic circuit diagram of a slip-controlled motor vehicle brake system 1, which does not include a pressure sensor for measuring the admission pressure.
Es sollen kurz die für die Erfindung wichtigen Komponenten umrissen werden. Die Bremsanlage 1 beinhaltet ein Bremsgerät mit einem Hauptbremszylinder 2. Diese Betätigungseinheit 2 erzeugt einen Vordruck. Umfasst der Hauptbremszylinder einen Drucksensor, so wird bei geöffnetem (=energielosem, stromlosem) Trennventil 3 der Vordruck unmittelbar hinter der Pumpe 4 gemessen. Das Wissen um diesen Druck ist insbesondere beim Einbremsen im Fall einer Fahrstabilitätsregelung (z.B. ESP- Bremsregelung) von großer Bedeutung und unverzichtbar.It will briefly be outlined the important components of the invention. The brake system 1 includes a brake device with a master cylinder 2. This actuator 2 generates a form. If the master brake cylinder includes a pressure sensor, the admission pressure immediately behind the pump 4 is measured when the isolation valve 3 is open (= energy-free, de-energized). The knowledge of this pressure is particularly important during deceleration in the case of a driving stability control (e.g., ESP brake control) and indispensable.
Ist kein Drucksensor zur Messung des Vordrucks vorhanden, wie in Fig. 1 dargestellt, so muss der Vordruck auf andere Weise bestimmt werden, um die Funktionsfähigkeit des elektronischen Bremssystems sicher zustellen. Nach dem beispielsgemäßen Verfahren wird im ESP-Regelungsfall, wenn von der ESP-Sensorik ein Regelungsbedarf sicher erkannt wurde, der Vordruck bestimmt, indem der Pumpenmotor 5 mit einem kurzen Spannungspuls angepulst wird. Die Pumpe 4 will gegen den Vordruck des Hauptbremszylinders 2 anlaufen. Das dabei abge- gebene Drehmoment ist proportional zu dem vom Motor konsumierten Strom. Aus einer hinterlegten Kalibrierdatenbank kann vom Strom auf den Vordruck geschlossen werden.If no pressure sensor for measuring the admission pressure is present, as shown in FIG. 1, the admission pressure must be determined in another way in order to ensure the functionality of the electronic brake system. According to the method according to the exemplary method, in the ESP control case, when a control requirement has been reliably detected by the ESP sensor system, the admission pressure is determined by the pump motor 5 being pulsed with a short voltage pulse. The pump 4 wants to start against the form of the master cylinder 2. The Torque is proportional to the current consumed by the motor. From a stored calibration database can be closed by the current on the form.
Die Abtastfrequenz der Stromantwort muss hoch genug sein und die Trägheit des Motor-Pumpen-Aggregates muss entsprechend dimensioniert sein. Letztlich muss die Pumpe gar nicht in Bewegung gesetzt werden, sondern es reicht aus, wenn innerhalb eines relevanten Druckbereichs, z.B. 0-300 bar, die Korrelation von Spannungs-Pulsdauer und Stromantwort sicher gestellt ist.The sampling frequency of the current response must be high enough and the inertia of the motor-pump unit must be dimensioned accordingly. Ultimately, the pump does not have to be set in motion, but it is sufficient if, within a relevant pressure range, e.g. 0-300 bar, the correlation of voltage pulse duration and current response is ensured.
Bei dem beispielgemäßen Verfahren wird ausgenutzt, dass der Motorstrom proportional zum Drehmoment an der Motorwelle ist, welches wiederum proportional zum am Pumpenkolben anstehenden Druck ist. In the exemplary method is exploited that the motor current is proportional to the torque on the motor shaft, which in turn is proportional to the pending on the pump piston pressure.

Claims

Patentansprüche claims
1. Verfahren zur Bestimmung eines zwischen einem Hauptbremszylinder und einem Einlassventil eines Radbremszylinders einer Kraftfahrzeug-Bremsanlage mit elektronischem Bremssystem herrschenden Vordrucks, dadurch gekennzeichnet, dass der Motorstrom eines getaktet betriebenen Motors einer Pumpe zur Förderung von Bremsflüssigkeit berücksichtigt wird, indem der Strom beim Anlaufen nach Anlegen mindestens eines Spannungspulses an den Motor gemessen wird.1. A method for determining a prevailing between a master cylinder and an intake valve of a wheel brake of a motor vehicle brake system with electronic brake system form, characterized in that the motor current of a clocked motor of a pump for the promotion of brake fluid is taken into account by the current at startup after application at least one voltage pulse is measured to the motor.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der bewegliche Teil des periodisch arbeitenden Motors sich um maximal zwei Perioden bewegt.2. The method according to claim 1, characterized in that the movable part of the periodically operating motor moves by a maximum of two periods.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Bestimmung des Vordrucks nur zu Beginn und/oder während einer Regelbremsung durchgeführt wird.3. The method according to claim 1 or 2, characterized in that the determination of the form is carried out only at the beginning and / or during a control braking.
4. Verfahren nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Zusammenhang zwischen Motorstrom und Vordruck durch eine Kalibrierdatenbank festgelegt wird.4. The method according to at least one of the preceding claims, characterized in that the relationship between motor current and form is determined by a calibration database.
5. Verfahren nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der bestimmte Vordruck als Regelgröße zur Regelung von Bremseingriffen in einem elektronischen Bremssystem, insbesondere einer Fahrstabilitätsregelung (ESP) , verwendet wird.5. The method according to at least one of the preceding claims, characterized in that the specific form as a control variable for controlling brake interventions in an electronic brake system, in particular a Driving Stability Control (ESP).
6. Elektrohydraulische Druckregelvorrichtung, insbesondere in einem elektronischen Kraftfahrzeugbremssystem, dadurch gekennzeichnet, dass ein Verfahren gemäß den Ansprüchen 1 bis 5 durchgeführt wird.6. Electrohydraulic pressure control device, in particular in an electronic motor vehicle brake system, characterized in that a method according to claims 1 to 5 is performed.
7. Druckregelvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass diese keinen Drucksensor zum Messen des Vordrucks umfasst. 7. Pressure control device according to claim 6, characterized in that it does not comprise a pressure sensor for measuring the form.
PCT/EP2006/068504 2005-11-21 2006-11-15 Method for determining an admission pressure in a motor vehicle brake unit WO2007057415A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510055780 DE102005055780A1 (en) 2005-11-21 2005-11-21 Method for determining a pre-pressure in a motor vehicle brake system
DE102005055780.5 2005-11-21

Publications (1)

Publication Number Publication Date
WO2007057415A1 true WO2007057415A1 (en) 2007-05-24

Family

ID=37561134

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/068504 WO2007057415A1 (en) 2005-11-21 2006-11-15 Method for determining an admission pressure in a motor vehicle brake unit

Country Status (2)

Country Link
DE (1) DE102005055780A1 (en)
WO (1) WO2007057415A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012025336A1 (en) * 2010-08-26 2012-03-01 Continental Teves Ag & Co. Ohg Method for measuring pressure, without pressure sensors, in a pressure regulation unit of a motor vehicle braking system, and a motor vehicle braking system comprising a pressure regulation unit in which said method is implemented

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020019335A (en) * 2018-07-31 2020-02-06 ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ Brake control device and brake control method
DE102019212968A1 (en) * 2019-08-29 2021-03-04 Continental Teves Ag & Co. Ohg Method for determining a hydraulic pressure in a brake system and brake system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4303206A1 (en) * 1993-02-04 1994-08-11 Teves Gmbh Alfred Method and circuit arrangement for determining the pedal force as a controlled variable for a brake system with anti-lock control
DE4440531A1 (en) * 1993-11-18 1995-05-24 Volkswagen Ag Hydraulic pressure indication system for vehicle anti-locking braking circuit
DE19528697A1 (en) * 1995-08-04 1997-02-06 Bosch Gmbh Robert Method and device for determining a pressure variable
DE19961293A1 (en) * 1998-12-28 2000-06-29 Bosch Gmbh Robert Measuring pressure in braking systems involves determining wheel brake pressure depending on estimated pilot pressure in reservoir, detected blocking device operating states
DE19946777A1 (en) * 1999-09-29 2001-04-12 Bosch Gmbh Robert Method and device for assessing predominant admission pressure between a main brake cylinder and an inlet valve in a wheel brake cylinder in a vehicle braking system uses after-running tension in a return pump's clock-pulsed motor.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9515542D0 (en) * 1995-07-28 1995-09-27 Lucas Ind Plc Accumulator pressure control in vehicle brake systems
US20060202552A1 (en) * 2003-07-11 2006-09-14 Continental Teves Ag & Co.Ohg Electronic control method for a slip-controlled motor vehicle brake system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4303206A1 (en) * 1993-02-04 1994-08-11 Teves Gmbh Alfred Method and circuit arrangement for determining the pedal force as a controlled variable for a brake system with anti-lock control
DE4440531A1 (en) * 1993-11-18 1995-05-24 Volkswagen Ag Hydraulic pressure indication system for vehicle anti-locking braking circuit
DE19528697A1 (en) * 1995-08-04 1997-02-06 Bosch Gmbh Robert Method and device for determining a pressure variable
DE19961293A1 (en) * 1998-12-28 2000-06-29 Bosch Gmbh Robert Measuring pressure in braking systems involves determining wheel brake pressure depending on estimated pilot pressure in reservoir, detected blocking device operating states
DE19946777A1 (en) * 1999-09-29 2001-04-12 Bosch Gmbh Robert Method and device for assessing predominant admission pressure between a main brake cylinder and an inlet valve in a wheel brake cylinder in a vehicle braking system uses after-running tension in a return pump's clock-pulsed motor.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012025336A1 (en) * 2010-08-26 2012-03-01 Continental Teves Ag & Co. Ohg Method for measuring pressure, without pressure sensors, in a pressure regulation unit of a motor vehicle braking system, and a motor vehicle braking system comprising a pressure regulation unit in which said method is implemented
US8527176B2 (en) 2010-08-26 2013-09-03 Continental Teves Ag & Co. Ohg Method for measuring pressure in a pressure regulation unit of a motor vehicle braking system, and a motor vehicle braking system in which the method is implemented

Also Published As

Publication number Publication date
DE102005055780A1 (en) 2007-05-24

Similar Documents

Publication Publication Date Title
EP2528789B1 (en) Electronic control device for a braking system
DE102013203599B4 (en) Method for calibrating analogue controlled hydraulic valves and a brake system
EP1919749B1 (en) Method for determining initial pressure in a motor vehicle braking system
DE112008002155B4 (en) Brake control system and brake control method
DE112008002061B4 (en) Pump controller and brake control system
DE102005046991B4 (en) Method and device for tensioning a hydraulic parking brake
EP2718158B1 (en) Method for operating a brake system, and brake system
DE10221456B4 (en) Method for calibrating the current / opening characteristic of an analog hydraulic valve
DE19914403A1 (en) Braking system has pressure sensor on pump output to detect pressure pulsations during pump operation that are evaluated to obtain measurement signal for controlling/monitoring pump
EP2608993B1 (en) Method for measuring pressure, without pressure sensors, in a pressure regulation unit of a motor vehicle braking system, and a motor vehicle braking system comprising a pressure regulation unit in which said method is implemented
DE102007032949B4 (en) Method for determining the delivery rate or the number of actuations of a fluid pump, in particular in an electronic motor vehicle brake system
EP1646541A1 (en) Electronic control method for a slip-controlled motor vehicle brake system
WO1991005686A1 (en) Process for operating an auxiliary pump
WO1990002066A1 (en) Process for checking the function or operatability of a device or of an installation or components thereof
WO2007057415A1 (en) Method for determining an admission pressure in a motor vehicle brake unit
DE102008036607B4 (en) Method and device for hydraulic brake pressure boosting
EP2170667B1 (en) Method for measuring out the admission pressure in an infinitely variable, electromagnetically actuated hydraulic valve
WO2010122132A1 (en) Method for calibrating a pump motor in a pressure control system
DE102007034113B4 (en) Method for calibrating a hydraulic pump
DE102010022493A1 (en) Brake system for vehicle, has transmission blocked during failure of brake booster, and storage chamber accommodating pressure unit from wheel brake or brake circuit for reducing pressure in wheel brake
DE10355239A1 (en) Slip-controlled braking system for road vehicle estimates pressure in brake circuits and has PWM control of electric motor driving hydraulic pump pressurizing brake circuits
DE102011082635A1 (en) Method for recognizing incorrectly determined pump control value in hydraulic brake system of motor vehicle, involves detecting incorrectly determined pump control value based on control value with respect to reference parameter
DE102016218660A1 (en) Method for fault diagnosis of a vacuum system
DE102008036216B4 (en) Pressure control method for motor vehicle braking and distance control systems
DE102009034333A1 (en) Electronically controlled motor vehicle brake pressure regulating method, involves providing control device with valve, and controlling valve such that change of rotational behavior and conveying characteristics of pump is reinforced

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase

Ref document number: 06819511

Country of ref document: EP

Kind code of ref document: A1