WO2012072487A1 - Système de freinage destiné à des véhicules automobiles - Google Patents

Système de freinage destiné à des véhicules automobiles Download PDF

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Publication number
WO2012072487A1
WO2012072487A1 PCT/EP2011/070939 EP2011070939W WO2012072487A1 WO 2012072487 A1 WO2012072487 A1 WO 2012072487A1 EP 2011070939 W EP2011070939 W EP 2011070939W WO 2012072487 A1 WO2012072487 A1 WO 2012072487A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
piston
pressure
brake system
cylinder
Prior art date
Application number
PCT/EP2011/070939
Other languages
German (de)
English (en)
Inventor
Stefan A. Drumm
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 WO2012072487A1 publication Critical patent/WO2012072487A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • 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
    • B60T8/44—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
    • B60T8/441—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems using hydraulic boosters

Definitions

  • the present invention relates to a brake system for
  • a brake pedal for actuating a master cylinder with at least one hydraulic piston, a first and a second pressure chamber, which are set upon actuation of the master brake cylinder under a first and a second brake system pressure and fed under these brake system pressures set pressure medium in associated Brems ⁇ circles,
  • Fill level monitoring device provided pressure fluid reservoir, which has the pressure chambers associated ports, with hydraulically controllable Rad ⁇ brakes, which are associated with wheels of the motor vehicle whose rotation is detected by wheel sensors,
  • a wheel brake pressure modulation unit having per Radbrem ⁇ se an intake valve and an exhaust valve for a ⁇ wheel-individual brake pressures, which are derived from the pressures in the first and second brake circuit, wherein, in the non-driven state, the intake valves forward the respective brake circuit pressures and the exhaust valves are locked,
  • Such a brake system is known from DE 10 2004 025 638 AI.
  • the entire pressure medium volume required in the wheel brakes in the master cylinder must be kept ready.
  • a master cylinder with a large hydraulic effective cross-section must be used, so that in an electroless operation or in operation in a so-called fallback level, unergonomically large brake pedal forces are to be applied by the vehicle driver.
  • the object underlying the present invention is to provide measures that allow the use of a master cylinder with a much smaller effective cross-section, which is inexpensive to manufacture and for its operation in the fallback level smaller brake pedal forces are applied by the vehicle ⁇ leader ,
  • FIG. 2 is a hydraulic circuit diagram of a comparison with FIG. 1 slightly modified embodiment of a he ⁇ inventive brake system
  • FIG. 3 is a hydraulic circuit diagram of another embodiment of a brake system according to the invention which is slightly modified compared to FIG. 1 and FIG. 3
  • Fig. 4 is a hydraulic circuit diagram of a second Ausure ⁇ tion of a brake system according to the invention.
  • the braking system illustrated in the drawing comprises We ⁇ sentlichen an actuatable by means of an actuating or brake pedal 1 hydraulic master brake cylinder 2, a hydraulic master cylinder 2 associated pressure fluid reservoir 3, a brake pressure modulation unit 4, at the output terminals wheel brakes 9, 10, 11, 12 of a not shown motor vehicle are connected to a motor-pump unit 5, electrically controllable pressure modulation inlet and outlet valves 6a-6d, 7a-7d, and with low-pressure accumulators 8a, 8b, further electrically controllable means 13 for generating a Boosting force, and an electronic control unit 14, which serves to drive the electrically controllable components.
  • the inlet ports of the inlet valves 6a-6d are supplied with pressures, referred to as brake system pressures, by system pressure lines 22a, 22b, while return lines 23a, 23b connect the outlet ports of the outlet valves 7a-7d to the low pressure accumulators 8a, 8b previously mentioned.
  • the amount of hydraulic pressure in the pressure medium reservoir 3 (brake) liquid is provided by means of a Level monitoring device detected, which is provided with the reference numeral 19.
  • the hydraulic master cylinder 2 which can be regarded as an actuating unit of the brake system according to the invention, in a schematically indicated housing 20, a hydraulic piston 15 which is designed as a stepped piston and hydraulic chambers or pressure chambers 16, 17, limited.
  • the first pressure chamber 16 is bounded by the annular surface of the Jardinnkol ⁇ bens 15 and the second pressure chamber 17 of the end face, so that the hydraulic piston 15 together with the encompassing portion of the housing 20 a
  • the pressure chambers 16, 17 are on the one hand via the piston 15 limited supply chambers 35, 36 with the Druckstoffvorratsbenzol ⁇ ter 3 in conjunction.
  • To the pressure chambers 16, 17 are the Radbremsfaren 9, 10 and 11, 12 associated, separate brake circuits ⁇ I, II connected via circuit pressure lines 21a, 21b, with which the aforementioned system pressure lines 22a, 22b are connectable.
  • pressure sensors 37, 38 are provided for detecting the pressures prevailing in the circular pressure lines 21a, 21b.
  • a common longitudinal axis ⁇ having separating piston devices 24a, 24b are essentially formed by separating pistons 39a, 39b limited An horrauerschn 40a, 40b and pressure discharge chambers 41a, 41b, wherein the pressure discharge chambers 41a, 41b, the separating piston 39a, 39b biasing return springs 42a, 42b record.
  • the output ⁇ connections of the aforementioned 2/2-way valves 25a, 25b and on the other hand, the system pressure lines 22a, 22b are connected to the pressure discharge chambers 41a, 41b.
  • a hydraulic booster chamber 26 is limited, whose function will be explained in more detail below.
  • the actuating travel of the brake pedal 1 or of the piston 15 is detected by a travel detection device 27, whose output signal represents the driver request initiated at the brake pedal 1.
  • the above-mentioned means 13 for generating the boosting force is designed as a hydraulic, electrically controllable pressure source or a single-circuit electrohydraulic actuator, the piston 29 of a schematically indicated electric motor 28 with the interposition of a likewise schematically indicated rotation-translation gear can be actuated.
  • One of the detection of the rotor position of the electric motor 28 serving rotor position sensor is denoted by the reference numeral 63.
  • the piston 29 defines a pressure chamber 30, which is connected by means of a hydraulic line 45 with the above-mentioned booster chamber 26, so that the force acting in the actuation direction on the master cylinder piston 15 boosting force is generated by the action of the hydraulic pressure in the pressure chamber 30.
  • the boosting force is designed as a pressure sensor.
  • a hydraulic connection 34 is provided between a pressure chamber 30 of the controllable pressure source 13 associated annular space 32 and the pressure medium reservoir 3.
  • an annular space 33 is provided, which acts as a wetting connection between a pressure-bearing, wetted on both sides with pressure medium and egg ⁇ nem the media pressure medium and air separating sealing ring.
  • the hydraulic connection 34 is shown connected to the annular chamber 33, which is a possible but not necessary for the invention hydraulic interconnection.
  • Fig. 1 it can be seen that to the hydraulic connection 34, a line section 44 is connected, the follow-up spaces 43a, 43b of the separating piston 24a, 24b (for example, via the aforementioned annulus 33 of the master cylinder 2) connects to the pressure fluid reservoir 3.
  • a further line section 46 that is connected to the hyd ⁇ raulische line 45 connects 40a the pressure chamber 30 of the electrically controllable pressure source 13 with the Anêtschsch, 40b of the separating piston devices 24a, 24b, so that applying pressure to the separation piston 39a, 39b to that of the electrically controllable pressure source 13 provided pressure is possible.
  • the aforementioned motor-pump unit 5 comprises a dual-circuit hydraulic pump whose pump circuits ⁇ 155a, 155b, the pressure medium conveyed by them to the leading to the inlet valves 6a-6d system pressure lines 22a, 22b deliver.
  • the pumps 155a, 155b of the two circles can be ⁇ performs, for example dreiflutig and in particular as two interleaved constructed three-piston pumps, the pistons by a joint on the Mo- Torwelle of the drive motor 155 mounted eccentric actuated betä ⁇ .
  • the embodiments of return pumps are known in the art and need not be further explained in connection with the present invention.
  • FIG. 2 The structure of the embodiment shown in Fig. 2 corresponds largely to the embodiment shown in Fig. 1, so that only the distinguishing features will be discussed here.
  • a preferential ⁇ as normally open (SO-), electromagnetically actuated 2/2-way valve 47 which prevents a flow of pressure medium between the intensifier chamber 26 and the pressure medium reservoir 3 in the energized state is connected between the above-mentioned line sections 34 and 45.
  • SO- normally open
  • FIGS. 3 and 4 are particularly suitable for motor vehicles which use electric or hybrid drive systems. Since in such motor vehicles the braking force required for braking the vehicles is at least partially generated by a (drive) electric motor operating in a so-called generator mode, the energy obtained during braking is used to charge accumulators (recuperation). stunts). In the case of recuperation braking and partial recuperation braking, the hydraulic brake circuits must be used
  • a piston-cylinder arrangement 50 is provided, on the piston 51 of which the two separating pistons 139a, 139b of the separating piston devices 124a, 124b are axially supported.
  • the pre-stressed by a restoring spring 53 in the direction of the separating piston 139a, 139b Col ⁇ ben 51 defines a hydraulic pressure chamber 52, or the one hand via a solenoid valve 54 with the gain ⁇ pressure line 45, and other hand, via a further Elektromag ⁇ netventil 55 with the conduit section 44 .
  • ⁇ the return line 34 is connected.
  • the two solenoid valves 54, 55 are vorgese ⁇ hen for controlling the pressure medium volume of Zy ⁇ cylinder-piston assembly 50 in recuperation.
  • the solenoid valves 54, 55 perform the function of a pressure chamber 52 toward closing (solenoid valve 54) or to the return line 34 toward closing check valve (solenoid valve 55).
  • FIG. 4 serves as an actuating unit of the brake system ⁇ a master cylinder 2 in the so-called.
  • Tandem design whose successively arranged piston 151, 152 pressure chambers 160, 170 which receive the pistons 151, 152 against the actuating direction biasing return springs 181, 182. Similar to the variant shown in FIG.
  • separating piston devices 224a, 224b are provided, which have a common longitudinal axis and whose pressure discharge chambers 241a, 241b can be connected or disconnected from the circular pressure lines 21a, 21b with the interposition of one separating valve 225a, 225b ,
  • the separating piston devices 224a, 224b, piston-cylinder assemblies 250a, 250b are associated with the pistons 251a, 251b each have two pressure ⁇ space 252a, 254a and 252b, 254b from each other.
  • the other pressure chambers 254a, 254b are interposed by a parallel arrangement of a respective electromagnet Zuschaltventils 255a, 255b and a pressure chamber 254a, 254b closing check valve 256a , 256b with the aforementioned circle ⁇ pressure lines 21a, 21b in connection.
  • the solenoid Zuschaltventile 255a, 255b are preferably designed as normally closed ⁇ (SG) 2/2-way valves, which in
  • a particularly compact brake system can have a nodular ⁇ ren structure.
  • a first module is formed by the master cylinder 2 with the associated pressure fluid reservoir 3, while all other, in particular electro-hydraulic components (e.g., pressure modulation unit 4, electrically controllable pressure source 13, electronic control ⁇ unit 14, separating piston devices 24a, 24b, 124a, 124b, 224a, 224b, pressure sensors 31, 37, 38 and all electric ⁇ solenoid valves and zufaultye lines) and the piston-cylinder assemblies 50, 250a, 250b can be combined to form a second module.
  • electro-hydraulic components e.g., pressure modulation unit 4, electrically controllable pressure source 13, electronic control ⁇ unit 14, separating piston devices 24a, 24b, 124a, 124b, 224a, 224b, pressure sensors 31, 37, 38 and all electric ⁇ solenoid valves and zufaultye lines
  • the piston-cylinder assemblies 50, 250a, 250b can be combined to form a second module.

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

Abstract

L'invention concerne un système de freinage destiné à des véhicules automobiles, lequel comporte entre autres un maître cylindre (2) pouvant être actionné au moyen d'une pédale de frein, un groupe moteur-pompe (4), un dispositif (13) servant à produire une force d'assistance et des soupapes de modulation de la pression de freinage (6a-6d ; 7a-7d). L'invention vise à permettre d'utiliser un maître-cylindre (2) peu coûteux à fabriquer, présentant une petite section utile hydraulique, et dont l'actionnement en mode sans courant (niveau de reprise) ne nécessite que des forces d'actionnement peu élevées. A cet effet, lors de processus de freinage assisté par une force d'assistance, le volume d'agent de pression amené aux freins de roue (10, 11, 12) est composé d'une première part volumique d'agent de pression qui est fournie par le maître-cylindre (2) et d'une deuxième part volumique d'agent de pression qui est régulée par le dispositif (13) produisant la force d'assistance.
PCT/EP2011/070939 2010-11-29 2011-11-24 Système de freinage destiné à des véhicules automobiles WO2012072487A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE102010062100.5 2010-11-29
DE102010062100 2010-11-29
DE102011002779.3 2011-01-17
DE102011002779 2011-01-17
DE201110086916 DE102011086916A1 (de) 2010-11-29 2011-11-23 Bremsanlage für Kraftfahrzeuge
DE102011086916.6 2011-11-23

Publications (1)

Publication Number Publication Date
WO2012072487A1 true WO2012072487A1 (fr) 2012-06-07

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Application Number Title Priority Date Filing Date
PCT/EP2011/070939 WO2012072487A1 (fr) 2010-11-29 2011-11-24 Système de freinage destiné à des véhicules automobiles

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DE (1) DE102011086916A1 (fr)
WO (1) WO2012072487A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018184845A1 (fr) * 2017-04-05 2018-10-11 Continental Teves Ag & Co. Ohg Système de freinage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013216141A1 (de) 2013-08-14 2015-02-19 Continental Teves Ag & Co. Ohg Bremsanlage für Kraftfahrzeuge
DE102015006853A1 (de) * 2015-05-21 2016-11-24 Lucas Automotive Gmbh Elektrohydraulische Kraftfahrzeug-Bremsanlage
DE102017221058A1 (de) 2017-11-24 2019-05-29 Continental Teves Ag & Co. Ohg Bremssystem für Kraftfahrzeuge und Betriebsverfahren
DE102017221057A1 (de) 2017-11-24 2019-05-29 Continental Teves Ag & Co. Ohg Bremssystem mit hydraulisch antreibbarem Hauptbremszylinder

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1915015A1 (de) * 1968-04-01 1969-10-23 Ernst Heinkel Ag Zweikreishauptzylinder vorzugsweise fuer Bremsanlagen von Kraftfahrzeugen
DE3444827A1 (de) * 1984-12-08 1986-06-12 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zur bremsdrucksteuerung bei fahrzeugbremsanlagen
DE3824918A1 (de) * 1988-07-22 1990-01-25 Teves Gmbh Alfred Ausgleichsbehaelter mit mindestens einer zwischenwand, insbesondere fuer bremsanlagen mit behaelterwarneinrichtung
EP0422457A1 (fr) * 1989-10-10 1991-04-17 Robert Bosch Gmbh Système de freinage
EP0436926A2 (fr) * 1990-01-08 1991-07-17 Bayerische Motoren Werke Aktiengesellschaft Système de freinage pour véhicules automobiles
DE4102497C1 (fr) * 1991-01-29 1992-05-07 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE19912866A1 (de) * 1998-03-23 1999-09-30 Nissan Motor Bremskraftsteuerung
DE102004025638A1 (de) 2003-11-06 2005-09-08 Continental Teves Ag & Co. Ohg Bremsanlage für Kraftfahrzeuge
WO2008155045A1 (fr) * 2007-06-19 2008-12-24 Lucas Automotive Gmbh Installation de frein pour un véhicule terrestre
WO2010006998A1 (fr) * 2008-07-17 2010-01-21 Robert Bosch Gmbh Maître-cylindre comportant des moyens d'injection de liquide de frein dans ledit maître-cylindre et un systeme de freinage comportant un tel maître-cylindre

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1915015A1 (de) * 1968-04-01 1969-10-23 Ernst Heinkel Ag Zweikreishauptzylinder vorzugsweise fuer Bremsanlagen von Kraftfahrzeugen
DE3444827A1 (de) * 1984-12-08 1986-06-12 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zur bremsdrucksteuerung bei fahrzeugbremsanlagen
DE3824918A1 (de) * 1988-07-22 1990-01-25 Teves Gmbh Alfred Ausgleichsbehaelter mit mindestens einer zwischenwand, insbesondere fuer bremsanlagen mit behaelterwarneinrichtung
EP0422457A1 (fr) * 1989-10-10 1991-04-17 Robert Bosch Gmbh Système de freinage
EP0436926A2 (fr) * 1990-01-08 1991-07-17 Bayerische Motoren Werke Aktiengesellschaft Système de freinage pour véhicules automobiles
DE4102497C1 (fr) * 1991-01-29 1992-05-07 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE19912866A1 (de) * 1998-03-23 1999-09-30 Nissan Motor Bremskraftsteuerung
DE102004025638A1 (de) 2003-11-06 2005-09-08 Continental Teves Ag & Co. Ohg Bremsanlage für Kraftfahrzeuge
WO2008155045A1 (fr) * 2007-06-19 2008-12-24 Lucas Automotive Gmbh Installation de frein pour un véhicule terrestre
WO2010006998A1 (fr) * 2008-07-17 2010-01-21 Robert Bosch Gmbh Maître-cylindre comportant des moyens d'injection de liquide de frein dans ledit maître-cylindre et un systeme de freinage comportant un tel maître-cylindre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018184845A1 (fr) * 2017-04-05 2018-10-11 Continental Teves Ag & Co. Ohg Système de freinage

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Publication number Publication date
DE102011086916A1 (de) 2012-05-31

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