EP0734334A1 - Systeme de freinage electropneumatique pour vehicules automobiles - Google Patents

Systeme de freinage electropneumatique pour vehicules automobiles

Info

Publication number
EP0734334A1
EP0734334A1 EP94918292A EP94918292A EP0734334A1 EP 0734334 A1 EP0734334 A1 EP 0734334A1 EP 94918292 A EP94918292 A EP 94918292A EP 94918292 A EP94918292 A EP 94918292A EP 0734334 A1 EP0734334 A1 EP 0734334A1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
brake
control unit
control
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.)
Ceased
Application number
EP94918292A
Other languages
German (de)
English (en)
Inventor
Otto Vollmer
Ansgar Fries
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.)
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Knorr Bremse Systeme fuer Schienenfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Knorr Bremse Systeme fuer Schienenfahrzeuge 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 Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH, Knorr Bremse Systeme fuer Schienenfahrzeuge GmbH filed Critical Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Publication of EP0734334A1 publication Critical patent/EP0734334A1/fr
Ceased 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
    • B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
    • B60T8/266—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves or actuators with external control 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
    • 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
    • B60T13/683—Electrical control in fluid-pressure brake systems by electrically-controlled valves in pneumatic systems or parts thereof
    • 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
    • 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
    • B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
    • B60T8/4818—Traction control, stability control, using both the wheel brakes and other automatic braking systems in pneumatic brake systems

Definitions

  • the invention relates to an electropneumatic brake system according to the preamble of claim 1.
  • Pressure medium braking systems with both electrical and pneumatic influencing are known, which are each assigned a rice valve to pressurize the brake cylinders of the front and rear axles.
  • Such Reiaisventiie have a pressure medium control and an electrical control, each electrical control is equipped with an electro-magnetic valve.
  • a pressure limiter is arranged between the solenoid valve and the pee ice valve. Such a configuration of the relay valves enables both electrical and pneumatic control.
  • the object of the invention is to design an electropneumatic brake system of the type in question in such a way that it meets the above requirements with little structural effort.
  • the features according to the labeling part of patent claim 1 serve to solve this task.
  • the pressure modulator which can preferably be used on the brake system of the vehicle rear axle and / or in association with the trailer control valve of a towing vehicle, ensures both electrical and pneumatic control of the relay valve or trailer control valve with the safety of the pneumatic fallback level.
  • the operating principle of the pressure modulator formed by the proportional valve and changeover valve can be used on brake systems with brake value transmitters which have one pneumatic and one electrical or which have two pneumatic and one electrical brake circuit or several such control circuits.
  • the pedal-operated brake value transmitter in the form of a foot brake valve outputs an electrical setpoint to the electronic control unit of the brake system for further processing, the control unit controlling the individual actuators of the system.
  • the electrical signals from a large number of sensors enter the electronic control unit, which in total can include the sensors of an EBS system and in their entirety contribute to the control of an electrical setpoint for the pressure modulator.
  • a load sensor for feeding load signals into the electronic control unit, this means that conventional load-dependent brake force regulators can be dispensed with. If the signals of a coupling force sensor are used between the towing vehicle and the trailer vehicle, then the influencing of the trailer control valve enables the brake system of the An depending on the coupling force change.
  • the redundancy behavior of the pressure modulators is ensured in a structurally very simple manner, namely by linking the proportional valve with a changeover valve, which can be controlled pneumatically as well as electromagnetically and pneumatically controlled in the event of failure of the electrical control, whether in association with a relay valve for the brake cylinders of the rear axle or be it in association with a preferably two-circuit trailer control valve for the trailer of a vehicle train.
  • Figure 1 shows the schematic of an electropneumatic brake system according to the invention according to a first embodiment of the invention
  • FIG. 2 is a schematic individual illustration of the pressure modulator used in the system according to FIG. 1 in association with a relay valve for the brake system of the rear axle;
  • FIG. 3 is a representation of the pressure modulator that is comparable to FIG. 2 and is associated with one
  • FIG. 4 is a schematic individual illustration of the pressure engine intended for use in accordance with FIG. 2 dulator under electrical control of both the proportional valve and the changeover valve;
  • FIG. 5 is an individual illustration of the pressure modulator of the use shown in FIG. 3 with electrical control of both the proportional valve and the changeover valve;
  • FIGS 6 and 7 are schematic representations of the brake system according to further embodiments of the invention.
  • a multi-circuit protection valve 1 this downstream compressed air reservoir, brake cylinder 3 of the front axle, brake cylinders 5 of the rear axle designed as a combined service brake and spring brake cylinder, a brake value transmitter 7 in the form of a Foot brake valve, a hand brake valve 9, a trailer control valve 11, pressure control valves 13 and 15 for the front and rear axles and an electronic control unit 17 are provided.
  • both the brake cylinders of the rear axle and / or the trailer control valve are each assigned an electropneumatic pressure modulator 19 with the mode of operation described below.
  • the pressure modulator 19 used in the system according to FIG. 1 consists of a changeover valve 21 and a proportional valve 23.
  • the proportional valve 23 works in a conventional manner with a proportional magnet, which can be excited via the electrical line 25 under the control of the electronic control unit 17.
  • the proportional valve measures a proportional pneumatic output pressure, which acts as a control pressure on the Pressure modulator 19 downstream relay valve ( Figures 1 and 2) comes into effect.
  • supply pressure is present at line 29 and the line 31 branching off from it;
  • the proportional pressure controlled by the proportional valve 23 passes through the line 33 into the changeover valve 21 and can be passed on from this via line 35 to the relay valve 27 or its control piston.
  • the Umsehaltventil 21 acts as a redundancy valve, such that when there is no electrical setpoint via a at the Umsehaltventil via
  • Line 35 pending pressure signal (pneumatic fallback level) a corresponding proportional pressure is controlled via line 37 for the purpose of acting on the relay valve.
  • This functional position is shown symbolically in FIG. 2.
  • the brake system of the rear axle is fed via a conventional relay valve 27, which can be controlled by the electropneumatic pressure modulator 19 in the manner explained above.
  • FIG. 2 shows the changeover valve in the redundancy position, in which there is free passage from line 35 into line 37 and accordingly to the relay valve; the proportional valve 23 which is not excited in this case has no effect.
  • FIG. 3 of the drawing shows the electropneumatic pressure modulator 19 in the assignment to the trailer control valve 11 which can be seen in the upper half of the drawing according to FIG.
  • Lines 39 and 41 lead from the changeover valve 21 and the proportional valve 23 to the associated, known connections of the trailer control valve, from which the lines 43 and 45 leading to the cooling heads for supply and brake pressure depart.
  • the internal circuitry of the pressure modulator 19 according to FIG. 3 is different from that according to FIG. 2, that is to say that Line 41 according to FIG. 3 is connected directly to the trailer control valve, so there is no control by the proportional valve in the manner as shown in FIG. 2.
  • the pressure originating from the front axle brake circuit is present at the trailer control valve 11 via line 39; line 41 remains depressurized.
  • the trailer control valve 11 is designed in a manner known per se as a two-circuit control valve, so that the unpressurized line 41 has no effect on the function of the trailer control valve.
  • the changeover valve is designed as a solenoid valve and can be controlled by the electrical control unit 17 via the electronic control line 47.
  • the proportional valve can be controlled via the electrical control line 25 in the manner explained with reference to FIG. 2.
  • the solenoid of the changeover valve When the solenoid of the changeover valve is excited, the connection between the proportional valve and line 37 is open; Corresponding to electromagnetic actuation of the proportional valve, the relay valve is actuated by the proportional valve, which is fed from the compressed air supply via line 29. If the electrical control of the changeover valve fails, the connection is closed
  • the brake value transmitter 7 controls pneumatically in two circuits
  • the front axle brake circuit being fed in a conventional manner directly, that is to say via the line 49 carrying compressed air
  • the rear axle brake circuit and / or the trailer control valve are fed using pressure modulators 19 of the type and mode of operation explained above are.
  • the pressure modulators 19 are provided according to the invention in order to convert an electrical setpoint of the electronic control unit 17 into a proportional output pressure. In the same way, it is ensured that, in the event of an electrical setpoint that is not present, a corresponding proportional pressure is controlled via the pneumatic fallback level (FIG. 2-5).
  • the control of the two-circuit trailer control valve is also possible conventionally, i.e. if necessary, the pressure modulator 19 for the trailer control valve can be dispensed with.
  • the embodiment according to FIG. 7 shows the variety of ways in which information can be received in the electronic control unit 17 and, after evaluation, is processed by the electronic control unit 17 to control the pressure modulators 19.
  • the measured values of the individual sensors are shown Command lines into the electronic control unit are processed there and are in turn controlled by the electropneumatic pressure modulators in the form of proportional pneumatic quantities.
  • Measurement signals from the load sensor 57 enter the pressure control unit 17 in a corresponding manner and are in turn converted into an electrical setpoint for the pressure modulator; In the case of electropneumatic brake systems of the type shown in FIG. 7, conventional brake force controllers with all variants can consequently be dispensed with.
  • a coupling force sensor 61 by assigning a coupling force sensor 61, the measured value sensed by the coupling force sensor is sent to the control unit 17 and subsequently to a proportional activation of the trailer control valve and accordingly to
  • compressed air is also provided in an ASR process by an electropneumatic pressure modulator.
  • the ASR differential brake valves with associated shuttle valves, which are usually present on the drive axle, are not required. since in this case the compressed air is consumed by the service brake circuit, the pressure switch 59 (FIG. 7) is provided in front of the pressure modulator 19. The pressure switch switches when the pressure drops below a predetermined pressure, so that the electronic control unit cancels the ASR process. In this way it is always ensured that there is sufficient compressed air in the container (HA container according to FIG. 7) during subsequent braking.
  • the components of the pressure modulator can have different configurations while maintaining the functional determination.
  • the proportional valve can have a proportional magnet with a corresponding valve part, but it can also be designed as a fast-switching double solenoid valve.

Landscapes

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

Abstract

Dans un système de freinage électropneumatique pour véhicules automobiles est prévu un capteur de freinage (7) actionné par pédale qui agit électriquement sur une unité de commande électronique (17) et alimente pneumatiquement un modulateur de pression (19) composé d'une valve proportionnelle et d'une valve d'inversion. Le modulateur de pression (19) est également piloté par des signaux électriques de valeur prescrite fournis par l'unité de commande électronique (17) et sert à activer un fluide sous pression qui actionne la valve réglant le système de freinage. En cas de défaillance du pilotage électrique, le modulateur de pression agit de manière redondante (niveau de réserve pneumatique).
EP94918292A 1993-12-17 1994-06-22 Systeme de freinage electropneumatique pour vehicules automobiles Ceased EP0734334A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4343215 1993-12-17
DE4343215 1993-12-17
PCT/DE1994/000712 WO1995016594A1 (fr) 1993-12-17 1994-06-22 Systeme de freinage electropneumatique pour vehicules automobiles

Publications (1)

Publication Number Publication Date
EP0734334A1 true EP0734334A1 (fr) 1996-10-02

Family

ID=6505362

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94918292A Ceased EP0734334A1 (fr) 1993-12-17 1994-06-22 Systeme de freinage electropneumatique pour vehicules automobiles

Country Status (4)

Country Link
US (1) US5718486A (fr)
EP (1) EP0734334A1 (fr)
JP (1) JPH09506314A (fr)
WO (1) WO1995016594A1 (fr)

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DE19708832A1 (de) * 1997-03-05 1998-09-10 Mannesmann Rexroth Ag Elektrisch gesteuertes Bremssystem für ein Radfahrzeug
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EP1132274B1 (fr) * 2000-02-26 2004-04-07 WABCO GmbH & CO. OHG Modulateur de pression de freinage pour système de freinage électronique
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DE10133440C2 (de) * 2001-07-10 2003-06-18 Knorr Bremse Systeme Bremsanlage mit elektropneumatischem Modulator
DE10158065B4 (de) * 2001-11-27 2010-09-23 Wabco Gmbh Redundanzdruck-Umschaltventil für elektronisch-pneumatische Bremsanlage
ITTO20011201A1 (it) * 2001-12-21 2003-06-21 Knorr Bremse Systeme Sistema di frenatura per un veicolo rimorchiato.
US7020551B2 (en) * 2003-12-23 2006-03-28 Bendix Commercial Vehicle Systems Llc Roll stability control system
US7008025B2 (en) * 2004-01-30 2006-03-07 Arvinmeritor Technology, Llc Electronic vehicle brake system with secondary braking provision
DE102004010743A1 (de) * 2004-03-05 2006-01-19 Wabco Gmbh & Co.Ohg Elektrisch gesteuerte pneumatische Bremsanlage für ein Fahrzeug
ITTO20040179A1 (it) † 2004-03-17 2004-06-17 Sab Wabco Spa Sistema di controllo della frenatura di un veicolo ferroviario o ferrotranviario con funzioni integrate di antipattinaggio e di antibloccaggio delle rotte
DE102006054433B4 (de) 2006-11-16 2024-03-14 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Streckbremseinrichtung für Kraftfahrzeuge
DE102008003381A1 (de) * 2008-01-07 2009-07-09 Wabco Gmbh Bremsanlage für ein Fahrzeug
DE102008047632A1 (de) * 2008-09-17 2010-03-25 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Feststellbremsanlage
DE102010021909A1 (de) 2010-05-28 2011-12-01 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Verfahren zur Steuerung einer Bremsanlage eines Fahrzeugs mit elektronisch geregeltem Hinterachsbremskreis und pneumatisch gesteuertem Vorderachsbremskreis
DE102012003106C5 (de) 2012-02-16 2022-01-27 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Verfahren zur Bestimmung eines Bremsdruckwerts anhand von Kennlinien
CN103350695B (zh) * 2013-07-31 2015-08-12 中联重科股份有限公司 车桥制动装置、方法和车辆
DE102013015972A1 (de) * 2013-09-25 2015-03-26 Wabco Gmbh Elektronisch-pneumatische Bremsanlage, beispielsweise für einen Lastkraftwagen oder Lastzug
DE102013016877B3 (de) * 2013-10-11 2014-10-09 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Verfahren zum Steuern einer Drucksteuervorrichtung einer Druckmittel-Bremsanlage eines Fahrzeugs
DE102014011422A1 (de) * 2014-07-31 2016-02-04 Wabco Gmbh Bremsdruckmodulator eines elektronischen Bremssystems eines Nutzfahrzeugs
DE102016010463A1 (de) * 2016-08-31 2018-03-01 Wabco Gmbh Verfahren zum elektronischen Steuern eines pneumatischen Bremssystems in einem Fahrzeug, insbesondere Nutzfahrzeug, sowie elektronisch steuerbares pneumatisches Bremssystem
US10131336B2 (en) * 2016-09-26 2018-11-20 Bendix Commercial Vehicle Systems Llc System and method for braking a vehicle
DE102017002716A1 (de) * 2017-03-21 2018-09-27 Wabco Gmbh Elektronisch steuerbares Bremssystem sowie Verfahren zum Steuern des elektronisch steuerbaren Bremssystems
EP3415386B1 (fr) * 2017-06-16 2019-12-11 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Système de frein de véhicule
DE102017007788A1 (de) * 2017-08-17 2019-02-21 Wabco Gmbh Verfahren zur Verzögerung eines Fahrzeuges, insbesondere eines Nutzfahrzeuges, sowie ein elektropneumatisches Bremssystem zur Durchführung des Verfahrens und Fahrzeug mit einem elektropneumatischen Bremssystem
EP3798072B1 (fr) * 2019-09-26 2021-10-13 Haldex Brake Products Aktiebolag Système de frein pour un véhicule commercial
WO2022078584A1 (fr) * 2020-10-14 2022-04-21 Zf Cv Systems Europe Bv Modulateur de pression de freinage, système de frein pneumatique et véhicule
EP4269193A1 (fr) * 2022-04-27 2023-11-01 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Système pneumatique de freinage de service à commande électronique d'un véhicule à redondance électro-pneumatique

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Also Published As

Publication number Publication date
US5718486A (en) 1998-02-17
WO1995016594A1 (fr) 1995-06-22
JPH09506314A (ja) 1997-06-24

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