EP2303654A1 - Procédé et dispositif pour déterminer et régler le point de fonctionnement dynamique de soupapes dans un système hydraulique - Google Patents

Procédé et dispositif pour déterminer et régler le point de fonctionnement dynamique de soupapes dans un système hydraulique

Info

Publication number
EP2303654A1
EP2303654A1 EP09780017A EP09780017A EP2303654A1 EP 2303654 A1 EP2303654 A1 EP 2303654A1 EP 09780017 A EP09780017 A EP 09780017A EP 09780017 A EP09780017 A EP 09780017A EP 2303654 A1 EP2303654 A1 EP 2303654A1
Authority
EP
European Patent Office
Prior art keywords
pressure
vor
switching valve
valve
valves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09780017A
Other languages
German (de)
English (en)
Inventor
Ulrich Mahlenbrey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2303654A1 publication Critical patent/EP2303654A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—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
    • B60T8/36—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 including a pilot valve responding to an electromagnetic force
    • 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
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • 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
    • B60T8/36—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 including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/3655—Continuously controlled electromagnetic valves
    • 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
    • B60T8/48—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 connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control 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
    • 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
    • B60T8/48—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 connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
    • B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
    • B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
    • B60T8/4863—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
    • B60T8/4872—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0324—With control of flow by a condition or characteristic of a fluid
    • Y10T137/0379—By fluid pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled

Definitions

  • the invention relates to a method for determining and balancing the operating point of changeover valves or circular pressure valves in a hydraulic system according to the preamble of claim 1, and a control device for carrying out such a method according to claim 8. Furthermore, the invention relates to a program for execution by a data processing system carrying out the method according to the invention and a data carrier with the stored program for execution by a data processing system.
  • ESP electronic stability program
  • DWT-B Dynamic Wheel Torque by Brake
  • LDP LiD Departure Prevention
  • DWT-B the engine torque is increased during quick steering in bends and at the same time the inner wheel is braked slightly at the rear axle, whereby more drive power of the engine is transmitted to the outside wheel.
  • LDP using the vehicle stability system, by applying slight brake pressures, the driver is assisted in maintaining the lane.
  • the accuracy of the brake pressures to be applied depends on the pressure setting accuracy of the circular pressures in ESP devices.
  • each of the brake circuits is independent of the other brake circuit able to actively build its own circular pressure or lock the pressure in the circle and hold.
  • the achievable accuracy, relied on the target pressure requirement, depends primarily on the tolerances of the changeover valves or circular pressure valves (UPS) or their tolerance position.
  • the brake circuits can have significant differences from each other.
  • the calculated by the control software Sollbestromung I of the individual changeover valves is dependent on the differential pressure dp at the valve and the flow rate q, which flows through the valve.
  • the I-dp-q characteristic map which describes these dependencies, is used in the prior art. Due to manufacturing tolerances, the changeover valves have different I-dp-q maps. So far, only one map is stored in the control software for all valves. This fits exactly only for a nominal valve (nominal valve) and does not take into account any tolerances.
  • a brake circuit controls the wheels in the front left and rear right and the other brake circuit controls the wheels front right and rear left.
  • the brake interventions described above require certain braking torques with the aim of influencing the yaw behavior of the vehicle.
  • these functions are designed as pure actuating functions, i. there is no controlled system with feedback.
  • the inventive method with the features of independent claim 1 advantageously has a method for determining the operating point of changeover valves of a hydraulic system of a vehicle, in particular a hydraulic brake circuit, wherein the hydraulic system includes at least one pressure generating means, a high pressure switching valve, a changeover valve and a form pressure sensor.
  • valves used are continuously adjustable valves, so-called change-over valves or circular pressure valves.
  • the determination of the operating point can be effected in that a pre-pressure p_before the higher than the target pressure of the change-over valve is established; the switching valve is energized with a target current I corresponding to the target pressure; the upstream pressure p_vor is reduced until the changeover valve closes; when the switching valve is closed, a pre-pressure p_vor_nominal is established; after opening the change-over valve, a pressure difference ⁇ p between the pre-pressure p_vor_nominal and a circular pressure p_ Vietnamese is detected; and / or based on the pressure difference .DELTA.p the operating point is determined and / or adjusted.
  • the determination of the operating point takes place in that, based on the pressure difference ⁇ p, the upstream pressure p_vor_neu to be established instead of the pre-pressure p is determined.
  • the prepressure p before can be increased again and / or the prepressure p_vor_new can be reduced if the pressure difference ⁇ p falls below a preset threshold value.
  • the target pressure can be determined according to the I-dp-q map.
  • the reduction of the prepressure p_vor can be carried out with a constant gradient.
  • a nominal characteristic field can be adjusted by means of the ascertained form p_vor_new, whereby a separate characteristic field does not have to be stored for each changeover valve.
  • the admission pressure is adjusted during the adjustment process of the changeover valve via the brake pedal.
  • the mean value is taken from the mapping of several measurements. In this case, an offset correction and / or a rotation of the affected characteristic curves makes sense.
  • all switching valves can be measured in a circle in a measuring cycle, whereby a time savings compared to individual measurements can be achieved.
  • the correction value determined in the previous measurements can be taken into account and used to calculate the new starting value.
  • the approach of the admission pressure to the circular pressure preferably takes place stepwise by iteration.
  • the step size can be adjusted according to an accuracy to be determined. Adaptation may, for the purposes of the invention, be understood as an enlargement and / or reduction.
  • the pressure sensor is mounted on a circle, the friction of the master cylinder piston should be taken into account for calculating the pressure in the other circle.
  • the inlet valve or intake valves of the lower-pressure circuit closes before opening the switching valve of the higher-pressure circuit, so that the circular volume does not reduce the pressure increase in the circuit to be measured.
  • the inventive method still has the advantages that no additional external sensors are needed. Furthermore, by means of the method according to the invention, the performance of non-regulating functions, e.g. DWT-B, LDP, BDW, in particular in an X-brake circuit distribution, and to be controlled functions, such as. FZR, ASR, CDD, improved.
  • non-regulating functions e.g. DWT-B, LDP, BDW
  • FZR, ASR, CDD controlled functions
  • Another aspect of the invention relates to a device for determining the operating point of changeover valves of a hydraulic system of a vehicle, in particular a hydraulic brake circuit, wherein the hydraulic system includes at least one pressure generating means, a high pressure switching valve, a changeover valve and a form pressure sensor.
  • Yet another aspect of the invention relates to a program for execution by a data processing system, wherein the program performs the steps of the inventive method when executed in a computer or a control device.
  • the invention relates to a data carrier, wherein a program for carrying out the method according to the invention is stored on the data carrier.
  • Fig. 1 is a block diagram of a hydraulic brake system of a vehicle; 2 shows a timing of the determination of the holding pressure.
  • Fig. 4 is a block diagram of a circuit arrangement.
  • Fig. 1 shows a block diagram of a hydraulic brake system of a vehicle, in which the hydraulic brake system is divided into two circuits in a known manner, in which case only the first circle is shown.
  • the circle is used to actuate the brakes of the left rear wheel HL and the right front wheel VR of the vehicle.
  • the hydraulic system is connected to a dual-circuit master cylinder 101, which comprises one or two independent master cylinders, which can be actuated by a brake pedal 103.
  • the brake pedal 103 additionally controls a brake light switch 102.
  • the independent brake circuits are described below using the example of the first brake circuit, the second brake circuit is constructed identically.
  • the first brake circuit of the hydraulic brake circuit has wheel brake cylinders 118 and 119, which are operatively mounted respectively to the wheels HL and VR of the vehicle.
  • the master cylinder 101 is connected to a high-pressure switching valve 105 via a hydraulic line 120 to which a master cylinder-side pressure sensor 104 is arranged.
  • the high-pressure switching valve 105 is closed in the de-energized state and opens when energized. It may be a dosable valve, a so-called continuous valve that can be brought between the open and closed positions in any position or a switching valve with only open or closed position.
  • the high-pressure switching valve 105 is connected to the suction side of a hydraulic pump 108.
  • the pressure side of the hydraulic pump 108 is connected via a valve 112 to the wheel brake cylinder 118 and a valve 114 to the wheel brake cylinder 119.
  • the valves 112 and 114 are opened in the de-energized state and are each bridged with a check valve 112, 113, which allows a return flow from the wheel brake cylinders 118 and 119.
  • the wheel brake cylinder 118 is connected via a valve 115, the wheel brake cylinder 119 via a valve 116 and both together via a check valve 109 with the suction side of the hydraulic pump 108 connected.
  • the valves 115 and 116 are closed in the de-energized state.
  • a pressure accumulator 110 is arranged on the valves 115 and 116 facing side of the check valve 109.
  • a radbremszylin- der constitution- der constitution sensor 117 is arranged at the wheel brake cylinder 118 .
  • a switching valve 106 allows separation of the high pressure side of the hydraulic pump 108 with the master cylinder 101.
  • the switching valve 106 is bridged with a check valve 107 which opens in the direction of the wheel brake cylinder.
  • the second hydraulic circuit is, as mentioned above, identical to the first hydraulic circuit and includes wheel brake cylinders for the right rear wheel and for the left front wheel with corresponding hydraulic pump, control valves, high pressure valves and changeover valves.
  • FIG. 2a shows the course of energization of the inlet valves for circuit 1
  • Fig. 2b shows the course of energization of the switching valves 106 and USV2
  • Fig. 2c the pressure curve in the master cylinder (pHZ or p_vor) and in the circle (p circle).
  • the reference numeral 201 designates the pressure curve in the master cylinder (pHZ or p_vor)
  • the reference symbol 202 the pressure curve in the circle 1 (p circle)
  • the reference symbol 203 the pressure curve in the circle 2 (p_circle 2).
  • a pressure is built up with the brake pedal 103 which is greater than the 5 s tolerance of the target pressure of the switching valve of the second circuit.
  • the form with grad gradients is significantly reduced below the 5s limit of the switching valves 106 and USV2, so that both switching valves are securely closed.
  • time t4 first the switching valve USV2 and then switching valve 106 is closed, wherein both switching valves hold the pressure corresponding to their tolerance.
  • the nominal target pressure of the switching valve 106 is built up via the brake pedal 103 and both switching valves are over-energized, so that both switching valves reliably hold the pressures.
  • the energization of the switching valve 106 is reduced to zero, whereby a pressure equalization between the pre-pressure p_vor and the first circle takes place. If the predisposition p_vor increases, the reversing valve 106 holds a higher pressure than a standard valve. If the admission pressure p_yor does not change, the switching valve 106 was kept under pressure too low.
  • the inlet valves in the first circle are closed in order to keep the volume to be displaced as small as possible. This increases the possible increase in pressure.
  • the supply of the reversing valve USV2 is reduced to zero, whereby a pressure equalization between the pre-pressure p_vor and the second circle takes place. If the pre-pressure p_vor remains the same, the reversing valve USV2 keeps a lower pressure than a standard valve.
  • the inlet valves of the first circuit are opened and pressure build-up begins for the subsequent measurement.
  • Fig. 3 shows a schematic flowchart of the comparison of the maps.
  • the current form p_vor is present in step 301.
  • a decision is made in step 302 as to whether the upstream pressure p_vor is increasing (compare FIGS. 2, t6 and t8, respectively). If the pre-pressure rises, the valve is in the positive tolerance band and in step 303, the pre-pressure p_vor is recalculated by means of p_vor_a Meeting p_vor_a Communication * 1,1.
  • step 305 it is decided whether the pre-pressure p_vor increases.
  • step 306 If it is decided in step 306 that the prepressure p before increases, the process proceeds to step 308.
  • step 309 it is decided in step 309 that the pre-pressure p_vor increases, the value with 5% accuracy is determined in step 311 and is stored in step 312 as the current pre-pressure p_vor_aktual.
  • step 310 it is decided whether the preset number of repeat measurements has been reached. If this number has not been reached, the process continues in step 308.
  • step 313 a schematic block diagram of an alternative software-based embodiment of the proposed device 400 for determining the operating point of valves of a hydraulic system of a vehicle is shown.
  • the proposed device includes a processing unit PU 401, which may be any processor or computer having a control unit, the controller executing controls based on software routines of a program stored in a memory MEM 402. Program instructions are fetched from the memory 402 and loaded into the control unit of the processing unit 401 to carry out the processing of the above-described functionalities.
  • processing steps may be carried out on the basis of input data DI and generate output data DO, wherein the input data may correspond to at least one pre-pressure and / or one circular pressure, and the output data DO may correspond to a pressure difference and / or a signal corresponding to an operating point.
  • a method and a device for determining the operating point of changeover valves of a hydraulic system of a vehicle, in particular a hydraulic brake circuit, has been described, wherein the hydraulic system comprises at least one pressure generating means, a high pressure switching valve, a changeover valve and a form pressure sensor, wherein a pre-pressure p_vor higher when the target pressure of the switching valve is established; the switching valve is energized with a target current corresponding to the target pressure; the upstream pressure p_vor is reduced until the changeover valve closes; when the switching valve is closed, a pre-pressure p_vor_nominal is established; after opening the change-over valve, a pressure difference Ap between the pre-pressure p_vor_nominal and a circular pressure p_nik is detected; and based on the pressure difference Ap, the operating point is determined.
  • the hydraulic system comprises at least one pressure generating means, a high pressure switching valve, a changeover valve and a form pressure sensor, wherein a pre-pressure p_vor higher when the target

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

La présente invention concerne un procédé et un dispositif pour déterminer le point de fonctionnement dynamique de soupapes d’inversion d’un système hydraulique d’un véhicule, en particulier d’un circuit de frein hydraulique, le système hydraulique contenant au moins des moyens de génération de pression (101, 108), une soupape de commande haute pression (105), une soupape d’inversion (106) et un capteur de pression d’alimentation (104). Une pression d’alimentation p_vor qui est supérieure à la pression cible de la soupape d’inversion est développée; la soupape d’inversion est soumise à un flux cible correspondant à la pression cible; la pression d’alimentation p_vor est réduite jusqu’à ce que la soupape d’inversion se ferme; lorsque la soupape d’inversion est fermée, une pression cible nominale p_vor_nominal est développée comme pression d’alimentation; après ouverture de la soupape d’inversion, une différence de pression ΔP entre la pression d’alimentation p_vor_nominal et une pression de circuit p_kreis est détectée; et le point de fonctionnement dynamique est déterminé sur la base de la différence de pression ΔP.
EP09780017A 2008-07-18 2009-06-30 Procédé et dispositif pour déterminer et régler le point de fonctionnement dynamique de soupapes dans un système hydraulique Withdrawn EP2303654A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008040534.5A DE102008040534B4 (de) 2008-07-18 2008-07-18 Verfahren und Vorrichtung zur Ermittlung und Abgleich des Arbeitspunktes von Ventilen in einem hydraulischen System
PCT/EP2009/058163 WO2010006919A1 (fr) 2008-07-18 2009-06-30 Procédé et dispositif pour déterminer et régler le point de fonctionnement dynamique de soupapes dans un système hydraulique

Publications (1)

Publication Number Publication Date
EP2303654A1 true EP2303654A1 (fr) 2011-04-06

Family

ID=41061116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09780017A Withdrawn EP2303654A1 (fr) 2008-07-18 2009-06-30 Procédé et dispositif pour déterminer et régler le point de fonctionnement dynamique de soupapes dans un système hydraulique

Country Status (5)

Country Link
US (1) US20110153177A1 (fr)
EP (1) EP2303654A1 (fr)
KR (1) KR20110040842A (fr)
DE (1) DE102008040534B4 (fr)
WO (1) WO2010006919A1 (fr)

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DE102020206177A1 (de) 2020-05-15 2021-11-18 Continental Teves Ag & Co. Ohg Verfahren zur Regelung der Druckstellung in einem Bremssystem

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WO2010006919A1 (fr) 2010-01-21
US20110153177A1 (en) 2011-06-23
DE102008040534A1 (de) 2010-01-21
DE102008040534B4 (de) 2021-01-07

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