EP1851096A1 - Unite de freinage pour faire fonctionner des freins d'une installation de freinage d'un vehicule - Google Patents

Unite de freinage pour faire fonctionner des freins d'une installation de freinage d'un vehicule

Info

Publication number
EP1851096A1
EP1851096A1 EP06708116A EP06708116A EP1851096A1 EP 1851096 A1 EP1851096 A1 EP 1851096A1 EP 06708116 A EP06708116 A EP 06708116A EP 06708116 A EP06708116 A EP 06708116A EP 1851096 A1 EP1851096 A1 EP 1851096A1
Authority
EP
European Patent Office
Prior art keywords
brake
brake pedal
pedal
brake booster
actuating
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Withdrawn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
EP06708116A
Other languages
German (de)
English (en)
Inventor
Jürgen Schonlau
Manfred Rüffer
Holger Kranlich
Torsten Queisser
Holger Von Hayn
Wolfgang Ritter
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.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and 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
Priority claimed from DE102005052310A external-priority patent/DE102005052310A1/de
Priority claimed from DE102005059746A external-priority patent/DE102005059746A1/de
Application filed by Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP1851096A1 publication Critical patent/EP1851096A1/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Withdrawn legal-status Critical Current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
    • B60T8/40—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
    • B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
    • B60T8/4077—Systems in which the booster is used as an auxiliary pressure source
    • 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
    • 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
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/18—Connection thereof to initiating means
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors

Definitions

  • Brake actuation unit for actuating a motor vehicle brake system
  • the invention relates to a brake actuation unit for actuating a motor vehicle brake system of the "brake-by-wire" type, which consists of a) a driver both by means of a brake pedal and by means of an electronic control unit operable brake booster, wherein means for decoupling a force-transmitting connection between the brake pedal and the Brake booster in the "brake-by-wire” operating mode are provided, b) a brake booster downstream master cylinder, c) means for detecting a driver deceleration request, and d) a cooperating with the brake pedal pedal travel, by the in the mode "Brake-by -wire "acting on the brake pedal restoring force is independent of an operation of the brake booster simulated and in the mode" brake-by-wire "in the decoupling of the force-transmitting connection between the brake pedal and the brake booster r switchable and outside the operating mode "brake-by-wire” can be switched off, wherein e) a mechanical connection between the
  • Brake booster and the brake pedal is provided, which allows the transmission of a force applied by the brake booster tensile force on the brake pedal and which is formed by two parts of the control valve of the brake booster operating rod, which can perform a relative movement to each other, wherein the first part with the valve piston of the control valve is connected and the second part is in force-transmitting connection with the brake pedal and is guided in the first part telescopically.
  • Such an actuating unit is known from DE 10 2004 011 622 Al.
  • electrohydraulic brake systems of this type there is a need to actively adjust wheel brake pressures, particularly during self-tests and system calibrations when the vehicle is stationary, without the driver pressing the brake pedal. Examples are the so-called. Pre-drive check before starting the drive when activating the brake system (wake-up eg by remote control of the central locking or door contact), or rinsing and calibration routines that take place after switching off the ignition.
  • the active pressure build-up at standstill without pedal operation which is performed for example for the purpose of checking the Simulatorabscados, represents a potential hazard, if maintenance work on the brake system are carried out at the same time (pinching).
  • the legal aspect (product liability) can be replaced by warnings z. B. in the vehicle handbook and in the workshop instructions, nevertheless, it is desirable that the system has intrinsic intelligence to prevent at least serious injuries to the workshop personnel.
  • an elastic element is arranged, which is compressed at an independent of the driver's will actuation of the brake booster by the electronic control unit.
  • the elastic element is designed as a compression spring, which radially surrounds the first part.
  • the second part has a stop which, after compressing the compression spring, allows the second part to be carried along by the first part.
  • Another particularly advantageous embodiment of the subject invention according to claim 4 is that the first part is guided in the second part telescopically and that the elastic element is formed by at least two, preferably oppositely disposed, resiliently biased locking elements of a locking mechanism provided between the two parts.
  • the two parts are separable from each other when exceeding a counter to the actuation direction of the brake booster acting, predetermined force.
  • Another advantageous development of the invention consists in that the locking mechanism is arranged on the end remote from the brake pedal of the second part.
  • the latching elements cooperate in the sense of unlocking the locking mechanism with a bevel formed on the first part.
  • An economically producible and very reliable working variant of the subject invention is characterized by the fact that the resiliently biased locking elements are formed as balls.
  • Another advantageous development of the subject invention is that software technical means are provided which assign a lesser vehicle deceleration to a certain actuation path of the brake pedal when a safety-critical error occurs.
  • Another useful embodiment of the invention finally provides that when a safety-critical error occurs, the simulator is switched off for a short time.
  • Fig. 1 shows a first embodiment of the brake actuating unit according to the invention in partial sectional view, in which the connection and disconnection of the pedal travel simulator is effected by hydraulic means;
  • Fig. 2a, b and 3a, b are diagrams of characteristic quantities of the actuating unit according to the invention for explaining the function of the invention
  • Fig. 4 shows a second embodiment of the brake actuation unit according to the invention in a FIG. 1 corresponding partial sectional view; and Fig. 5a, b show further diagrams of characteristic variables of the actuating unit according to the invention for explaining the function of the invention.
  • the structure of the aforementioned brake actuation unit for operating a motor vehicle brake system of the "brake-by-wire" type is known from DE 10 2004 011 622 A1 mentioned in the introductory part of the description
  • the path of a movable wall of the brake booster 1 is sensed by means of a displacement sensor (BWS) while the driver deceleration request by means of a sensor device
  • BWS displacement sensor
  • both the displacement sensor and the sensor device are sufficiently disclosed in the above-mentioned publication, they are not shown in the attached drawing, one in particular with the brake pedal 3 in the operating mode "Br ake-by-wire "cooperating pedal travel simulator 4, which gives the driver the usual brake pedal feel, cooperates with an electro-hydraulic shut-off device 5, which shuts off the pedal travel simulator 4 outside the" brake-by-wire “mode.
  • the pedal travel simulator 4 is located in the embodiment shown outside the power flow between the brake pedal 3 and the brake booster. 1
  • the transmission of the force applied to the brake pedal 3 actuating force to a control piston 6 of the control valve 2 is a coupled to the brake pedal 3 piston rod 7, which is formed in two parts and a connected to the valve piston 6 first part 8 and one with the brake pedal. 3 associated second part 9. Between the two parts 8, 9, an axial gap "a” is provided, which ensures a decoupling of the force-transmitting connection between the brake pedal 3 and the brake booster 1 in the "brake-by-wire" mode.
  • the brake pedal 3 associated portion of the first part 8 is provided with a stepped bore 13 which receives the second part 9 partially and its leadership is used.
  • an elastic element 11 such that it relative to each other in a relative movement of the parts 8, 9 and. a movement of the first part 8 is compressed in the drawing to the left.
  • the elastic element 11 is preferably formed as a compression spring 12, which surrounds the second part 9 radially.
  • the previously mentioned shutdown device 5 is essentially formed by a piston-cylinder arrangement 51, the piston 52 is in force-transmitting connection with the pedal travel 4 and limits a pressure chamber 57 which is connected by a hydraulic connection 53 to a low-pressure hydraulic accumulator 54.
  • a hydraulic connection In the hydraulic connection, an electromagnetically actuated valve 55 is inserted, which allows a shut-off of said connection.
  • a sensor device not shown, to detect the movement of the piston 52, which, however, is only possible if the valve 55 releases the hydraulic connection between the pressure chamber 57 and the low-pressure accumulator 54.
  • the brake pedal 3 associated second part 90 is provided with a bore 130 which receives the first part 80 partially and its leadership is used.
  • a locking mechanism 110 is provided on the brake pedal 3 remote from the end of the second part 90, which limits the relative movement of the first part 80 relative to the second part 90.
  • the mentioned locking mechanism is in the example shown by at least two staggered arranged in the second part 90 radially guided locking elements 130 and a formed on the first part 80 bevel 140 formed, wherein the locking elements are designed as biased by means of non-designated springs balls.
  • the function of the shut - off valve 55 is either at each brake or only during certain braking operations or. performed before commissioning the vehicle.
  • the control valve 6 of the brake booster 1 is actuated by means of the previously mentioned electromagnet 10, so that the first part 80 of the actuating rod 7 initially moves in the drawing to the left.
  • the second part 90 and thus the brake pedal 3 are taken over the locking mechanism 110.
  • the first part 80 becomes from the second Part 90 decoupled, so that no risk of trapping by the mitbewegte brake pedal 3 threatens.
  • a plausibility check is carried out between the signals of the sensor device (PAS) detecting the driver's request and the travel sensor (BWS) detecting the travel of the movable wall of the brake booster 1. If the values assigned to each other deviate greatly during the plausibility check If a defined threshold value is exceeded, software-technical measures are carried out whose effect is shown in FIG. 5a, which shows the dependency of the vehicle deceleration V on the actuation travel s of the brake pedal 3.
  • Vi is the characteristic of a faultless system
  • V 2 denotes the characteristic of a system in which one of the aforementioned errors has occurred.
  • suitable software means ensure that the characteristic is "stretched", i.e. that a longer brake pedal travel s is assigned to the same deceleration value, so to achieve a deceleration value of, for example, 40%, for the intact one 25 mm is required for the brake system, in the case of a faulty system a pedal travel s of approximately 55 mm must be returned
  • the described measures are particularly applicable when safety - critical faults occur.
  • an audible or audible warning signal is generated, indicating to the driver that the braking function is in a non-typical condition, which may mean that either too much air in the system or leakage has led to that condition ,

Abstract

L'invention concerne une unité de fonctionnement de freinage destiné à faire fonctionner une installation de freinage pour un véhicule, de type « frein à commande électrique », comprenant : a) un amplificateur de force de freinage pouvant fonctionner au moyen de la pédale de frein et également au moyen d'une unité de commande électronique, en fonction des choix du conducteur, des organes permettant de découpler une liaison transmettant la force entre la pédale de frein et l'amplificateur de freinage étant utilisés dans le mode de fonctionnement « frein à commande électrique » ; b) un cylindre de freinage principal relié en aval de l'amplificateur de freinage, c) des organes déterminant la volonté de ralentir du conducteur, ainsi que d) un simulateur de la trajectoire de la pédale agissant avec la pédale de frein, grâce auquel, dans le mode de fonctionnement « frein à commande électrique », une force de rappel agissant sur la pédale de frein indépendamment du fonctionnement de l'amplificateur de force de freinage peut être simulée et qui, dans le mode de fonctionnement « frein à commande électrique », peut être embrayé lors du découplage de la liaison transmettant la force entre la pédale de frein et l'amplificateur de force de freinage et débrayé en dehors du mode de fonctionnement « frein à commande électrique », e) une liaison mécanique effectuée entre l'amplificateur de force de freinage et la pédale de frein, permettant la transmission d'une force de traction appliquée à l'amplificateur de force de freinage et formée par deux parties d'un arbre de fonctionnement faisant fonctionner la soupape de commande de l'amplificateur de la force de freinage, ces dernières pouvant être déplacées l'une par rapport à l'autre, la première partie étant reliée au piston de soupape de la soupape de commande et la seconde partie étant reliée à la pédale de frein de manière à transmettre une force. L'objectif de l'invention est d'éliminer les risques de défaillances, qui apparaissent lors de la vérification du débrayage du simulateur, durant des périodes de maintenance simultanées sur l'installation de freinage. A cet effet, un élément élastique (11) est disposé entre les deux parties (8, 9), lequel peut être comprimé, dans un mode de fonctionnement souhaité par l'utilisateur de l'amplificateur de force de freinage (1), par l'unité de commande électronique.
EP06708116A 2005-02-08 2006-02-08 Unite de freinage pour faire fonctionner des freins d'une installation de freinage d'un vehicule Withdrawn EP1851096A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102005005628 2005-02-08
DE102005052310A DE102005052310A1 (de) 2004-11-03 2005-11-01 Bremsbetätigungseinheit SBA
DE102005059746A DE102005059746A1 (de) 2005-02-08 2005-12-14 Bremsbetätigungseinheit zur Betätigung einer Kraftfahrzeugbremsanlage
PCT/EP2006/050770 WO2006084864A1 (fr) 2005-02-08 2006-02-08 Unite de freinage pour faire fonctionner des freins d'une installation de freinage d'un vehicule

Publications (1)

Publication Number Publication Date
EP1851096A1 true EP1851096A1 (fr) 2007-11-07

Family

ID=36181181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06708116A Withdrawn EP1851096A1 (fr) 2005-02-08 2006-02-08 Unite de freinage pour faire fonctionner des freins d'une installation de freinage d'un vehicule

Country Status (4)

Country Link
EP (1) EP1851096A1 (fr)
JP (1) JP2008535711A (fr)
KR (1) KR20070102604A (fr)
WO (1) WO2006084864A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006059949A1 (de) 2006-02-23 2007-12-06 Continental Teves Ag & Co. Ohg Verfahren zum Betreiben einer Kraftfahrzeugbremsanlage
DE102007010513A1 (de) * 2006-05-19 2007-11-22 Continental Teves Ag & Co. Ohg Betätigungseinheit für eine Kraftfahrzeugbremsanlage
DE102007016754A1 (de) 2006-11-29 2008-08-21 Continental Teves Ag & Co. Ohg Verfahren zur Überwachung der Funktionsfähigkeit einer Bremsbetätigungseinheit
EP2132067B1 (fr) 2007-03-05 2012-03-07 Continental Teves AG & Co. oHG Unité d'actionnement pour système de freinage d'automobile
US8607660B2 (en) 2009-12-02 2013-12-17 Ford Global Technologies, Llc Vehicle braking assembly
US8646357B2 (en) 2009-12-02 2014-02-11 Ford Global Technologies, Llc Vehicle braking assembly with gap management system
DE102010025252B4 (de) 2010-06-22 2013-01-24 Technische Universität Ilmenau Vorrichtung und Verfahren zur Simulation der Pedalcharakteristik einer entkoppelten Kraftfahrzeugbremsanlage
KR102090186B1 (ko) 2013-09-17 2020-03-19 현대모비스 주식회사 윤활유 내장형 전자페달 및 이를 적용한 브레이크 바이 와이어 시스템
US9248819B1 (en) 2014-10-28 2016-02-02 Nissan North America, Inc. Method of customizing vehicle control system
US9132839B1 (en) 2014-10-28 2015-09-15 Nissan North America, Inc. Method and system of adjusting performance characteristic of vehicle control system
DE102016210617A1 (de) 2016-06-15 2017-12-21 Robert Bosch Gmbh Steuervorrichtung und Verfahren zum Betreiben eines elektromechanischen Bremskraftverstärkers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1521696B1 (fr) * 2002-07-09 2006-12-27 Continental Teves AG & Co. oHG Dispositif d'actionnement de frein a commande electrique
DE10230865A1 (de) * 2002-07-09 2004-02-05 Continental Teves Ag & Co. Ohg Bremsbetätigung mit einem pneumatischen Verstärker und einem elektrisch angetriebenen Simulator
DE10358321B4 (de) * 2002-12-13 2020-08-27 Zf Active Safety Gmbh Hydraulische Pedalsimulationsvorrichtung
DE102004011622A1 (de) * 2003-08-06 2005-03-31 Continental Teves Ag & Co. Ohg Bremsbetätigungseinheit zur Betätigung einer Kraftfahrzeugbremsanlage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006084864A1 *

Also Published As

Publication number Publication date
WO2006084864A1 (fr) 2006-08-17
KR20070102604A (ko) 2007-10-18
JP2008535711A (ja) 2008-09-04

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