WO1994007719A1 - Systeme hydraulique de freinage avec dispositif antiblocage - Google Patents

Systeme hydraulique de freinage avec dispositif antiblocage Download PDF

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Publication number
WO1994007719A1
WO1994007719A1 PCT/EP1993/002566 EP9302566W WO9407719A1 WO 1994007719 A1 WO1994007719 A1 WO 1994007719A1 EP 9302566 W EP9302566 W EP 9302566W WO 9407719 A1 WO9407719 A1 WO 9407719A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
outlet valves
outlet
pump
pressure medium
Prior art date
Application number
PCT/EP1993/002566
Other languages
German (de)
English (en)
Inventor
Peter Volz
Dalibor Zaviska
Original Assignee
Itt Automotive Europe 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 Itt Automotive Europe Gmbh filed Critical Itt Automotive Europe Gmbh
Publication of WO1994007719A1 publication Critical patent/WO1994007719A1/fr

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
    • B60T8/44—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
    • B60T8/445—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 replenishing the released brake fluid volume into the brake piping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/404—Control of the pump unit
    • B60T8/4059—Control of the pump unit involving the rate of delivery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/42—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 having expanding chambers for controlling pressure, i.e. closed systems
    • B60T8/4275—Pump-back systems
    • B60T8/4291—Pump-back systems having means to reduce or eliminate pedal kick-back

Definitions

  • the invention relates to an anti-lock hydraulic brake system, with a master cylinder, with electrically actuable inlet and outlet valves for brake pressure modulation, with an electric motor-driven hydraulic pump for returning the pressure medium flowing out in the brake pressure reduction phases from the wheel brakes via the outlet valves into the master cylinder and / or in the wheel brakes, with sensors for determining the controlled variables and with an electronic circuit for evaluating the sensor signals and for generating valve actuation and pump control signals.
  • ABS systems Anti-lock braking systems of this type are known.
  • the pumps available for returning the pressure medium which is derived from a wheel brake cylinder via an outlet valve during a pressure reduction control, must of course be designed in such a way that they provide the delivery rate required in the worst case at the maximum possible back pressure.
  • the motor-pump unit is therefore oversized for the large number of ABS brakes that only require a fraction of the maximum possible output. In the "normal case”, this leads to excessive delivery rates and results in disturbing pump, motor and valve noises as well as undesired pedal movements that impair comfort. It is also already known to reduce the speed of a hydraulic pump in order to reduce the disturbing noises if this allows the delivery capacity required in the respective situation (DE 40 32 876 AI).
  • the invention is based on the object of designing a brake system in such a way that the delivery rate of the hydraulic pump required in the respective situation is determined as precisely as possible and the delivery rate can consequently be limited to this value.
  • a low-pressure accumulator is connected to the outlet of the outlet valve, the volume absorption of which is evaluated as a measure of the quantity of pressure medium flowing through the outlet valve.
  • the volume flow of the pressure medium flowing through the outlet valves and / or the volume flow changes can also be evaluated as control variables. If the low-pressure accumulator contains a piston that can be displaced against spring force when absorbing pressure medium, it is expedient to measure this piston displacement with the aid of a displacement sensor. The output signals of this displacement sensor then provide direct information about the current storage content of the low-pressure accumulator, the volume flow and / or changes in volume flow.
  • a vehicle wheel 1 is connected to a brake circuit I of a master brake cylinder 3 via an electrically or electromagnetically actuable inlet valve 2.
  • the inlet valve is switched to passage in its rest position.
  • a similar outlet valve 4 is present, which, however, does not allow any pressure medium flow in its rest position.
  • the pressure medium derived via this outlet valve 4 is returned via a hydraulic pump 5 into the brake circuit I or into the master cylinder 3 and / or into the wheel brake 6 of the wheel 1.
  • the hydraulic pump 5 is driven by means of an electric motor M; for variable control of the motor M, a contact m is indicated symbolically.
  • a low-pressure accumulator 8 is connected to the hydraulic line 7 connecting the outlet of the outlet valve 4 to the suction side of the hydraulic pump 5.
  • a storage chamber 9 of the low-pressure accumulator 8 is delimited by the end face of a piston 10, which can be displaced against the force of a spring 11.
  • the piston stroke is measured with the aid of a displacement sensor 12, which emits an electrical signal corresponding to the stroke.
  • a pressure sensor 13 is thus present in the storage chamber 9 of the low-pressure accumulator 8.
  • the pressure medium volume V, the volume flow V and the volume flow change V can also be determined and evaluated for the control via the pressure volume identifier of the accumulator.
  • the brake system also includes an electronic controller 14 which logically combines input signals supplied by sensors, evaluates them and generates control signals.
  • the controller 14 is supplied with the output signals of so-called wheel sensors 15 and the output signals from the pressure sensor 13 and / or the displacement sensor 12.
  • the output signals A 1 to A, A serve to control the inlet and outlet valves 2, 4 and - via the contact m - the drive motor M of the hydraulic pump 5.
  • the figure shows the connection of only one vehicle wheel 1 to the master cylinder 3 of the brake system.
  • Master cylinders with two hydraulically separated brake circuits, to which the wheels of a vehicle diagonal are connected, are very often used these days.
  • a brake system of the type shown works in principle as follows:
  • Low-pressure accumulator 8 favors, which receives the pressure medium volume derived via the outlet valve 4 in the start-up phase of the pump 5.
  • the piston 10 of the low-pressure accumulator 8 is displaced against the (relatively low) force of the return spring 11.
  • Essential to the invention is the sensing of the displacement of the piston 10 as a measure of the amount of pressure medium received by the low-pressure accumulator 8 and / or the sensing of the pressure in the low-pressure accumulator 8.
  • the same pressure prevails at the outlet of the outlet valve 4, on the suction side of the hydraulic pump 5 and in the pressure medium line 7.
  • the amount of pressure medium in the memory 8 can be very easily measure, for example with the help of the displacement sensor 12, which sits on the piston rod.
  • the volume flow V and, if necessary, the volume flow changes can also be determined from the sensor signals.
  • the aim of the invention is to adapt the control of the hydraulic or return pump 5 as precisely as possible to the volume requirement in the respective control situation.
  • the speed of the pump which largely determines the delivery rate, will be in most situations far below the nominal or maximum value of the pump, which is a decisive reduction in noise and increased comfort, e.g. Reduction in pedal movements.
  • the pump motor M is controlled with a variable voltage signal or preferably with a pulse sequence, the pulse duration / pulse pause ratio of which is variable.
  • the pulse duration / pulse pause ratio is determined by the controller 14, the output signal of the displacement sensor 12 and / or the pressure sensor 13 making a decisive contribution to the exact determination of the required delivery volume of the pump 5 and thus to the formation of the control signal.
  • a displacement sensor or a pressure sensor may be sufficient.
  • Mutual monitoring is possible if both sensor types are available.
  • the signal evaluation is expediently not only to include the instantaneous pressure and / or the position of the piston 10, but also the gradients or changes in these variables, in that the first and / or second derivative of the piston movement and / or the Pressure are formed and evaluated.
  • the prerequisite for an exact adaptation of the pump delivery capacity to the respective, fluctuating pressure medium requirement is created by inserting simple, inexpensive sensors at the outlet of the outlet valve 4 and / or at the low-pressure accumulator 8.
  • the sensors provided for controlling the hydraulic pump 5 also provide information about the control process, which of course can also be included in the anti-lock control.
  • the actual pressure in the wheel brake 6, which is an important control variable, is measured or estimated in practice only indirectly, namely by evaluating the valve actuation times.
  • the output signals of the displacement and pressure sensor 13 allow conclusions to be drawn about the pressure in the wheel brake 6.
  • the pressure sensor 13 is particularly unnecessary if the pressure curve can be determined by the volume movement measured with the displacement sensor 12 as a function of the characteristic curve of the low-pressure accumulator 8.

Landscapes

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

Abstract

Un système hydraulique de freinage à antiblocage qui comprend des soupapes d'admission et de décharge (2, 4) à commande électrique pour moduler la pression de freinage, une pompe hydraulique (5) entraînée par un moteur électrique pour refouler le fluide hydraulique qui s'écoule des freins (6) des roues par l'intermédiaire de la soupape de décharge (4) pendant les phases de réduction de la pression, ainsi que le cas échéant un accumulateur (8) de basse pression qui reçoit le fluide hydraulique dans la phase de démarrage de la pompe, est équipé de dispositifs de mesure de la pression (13) à la sortie de la soupape de décharge (4) et/ou de mesure des quantités de fluide hydraulique s'écoulant à travers la soupape de décharge (4) et reçu dans l'accumulateur (8). La capacité de refoulement de la pompe hydraulique (5) requise dans chaque situation de régulation est déterminée au moyen des signaux de sortie de ces dispositifs de mesure (12, 13) et la vitesse de rotation de la pompe est réglée par une variation correspondante du signal de commande de la pompe.
PCT/EP1993/002566 1992-09-29 1993-09-22 Systeme hydraulique de freinage avec dispositif antiblocage WO1994007719A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924232614 DE4232614A1 (de) 1992-09-29 1992-09-29 Blockiergeschützte hydraulische Bremsanlage
DEP4232614.1 1992-09-29

Publications (1)

Publication Number Publication Date
WO1994007719A1 true WO1994007719A1 (fr) 1994-04-14

Family

ID=6469123

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/002566 WO1994007719A1 (fr) 1992-09-29 1993-09-22 Systeme hydraulique de freinage avec dispositif antiblocage

Country Status (2)

Country Link
DE (1) DE4232614A1 (fr)
WO (1) WO1994007719A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997047503A1 (fr) * 1996-06-07 1997-12-18 Robert Bosch Gmbh Procede et circuit pour reguler un moteur de pompe dans un systeme de regulation d'un vehicule
EP1388476A2 (fr) * 2002-08-08 2004-02-11 Robert Bosch Gmbh Ensemble hydraulique pour système de freinage avec dispositif anti-blocage
EP1977943A3 (fr) * 2007-04-05 2010-09-08 FTE automotive GmbH Système de freinage hydraulique à antiblocage, en particulier pour motos

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4412822A1 (de) * 1994-04-14 1995-10-19 Teves Gmbh Alfred Hydraulische Bremsanlage mit Schlupfregelung
US5924777A (en) * 1994-09-28 1999-07-20 Aisin Seiki Kabushiki Kaisha Antilock brake system
DE4434960A1 (de) * 1994-09-30 1996-04-04 Teves Gmbh Alfred Hydraulische Bremsanlage und Verfahren zur Druckregelung
DE4440517B4 (de) * 1994-11-12 2004-04-15 Robert Bosch Gmbh Verfahren und Vorrichtung zur Ansteuerung einer Rückförderpumpe
DE19602363A1 (de) * 1996-01-24 1997-07-31 Teves Gmbh Alfred Bremsdrucksteueranlagen
DE19611550A1 (de) * 1996-03-23 1997-09-25 Teves Gmbh Alfred Pumpenloses Bremsdruckregelsystem für Kraftfahrzeuge
DE19632311B4 (de) * 1996-08-12 2006-10-12 Continental Teves Ag & Co. Ohg Verfahren zur Steuerung der Hydraulikpumpe einer geregelten Bremsanlage
DE19735032B4 (de) * 1997-08-13 2008-01-31 Continental Teves Ag & Co. Ohg Verfahren zur Ansteuerung einer Pumpe in einer blockiergeschützten Bremsanlage eines Kraftfahrzeuges
EP1490249B1 (fr) * 2002-04-03 2006-01-04 Continental Teves AG & Co. oHG Procede pour ameliorer le fonctionnement regulateur de systemes de regulation de vehicules a moteur
DE102004045391A1 (de) 2004-09-18 2006-03-23 Robert Bosch Gmbh Verfahren zur Steuerung oder Regelung eines elektronisch ansteuerbaren, nach dem Rückförderprinzip arbeitenden Fahrzeugbremssystems und elektronisch ansteuerbares, nach dem Rückförderprinzip arbeitendes Fahrzeugbremssystem
DE102006004745A1 (de) * 2005-04-02 2006-11-30 Continental Teves Ag & Co. Ohg Hydraulische Bremsanlage mit Blockierschutzregelung
US7931345B2 (en) 2006-07-11 2011-04-26 Continental Teves Ag & Co. Ohg Motor vehicle brake system having a low pressure accumulator
DE102012223497A1 (de) * 2012-12-18 2014-06-18 Continental Teves Ag & Co. Ohg Bremsanlage für Kraftfahrzeuge

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DE3404135A1 (de) * 1984-02-07 1985-08-14 Daimler-Benz Ag, 7000 Stuttgart Einrichtung zur nachspeisung von bremsfluessigkeit
JPS6144062A (ja) * 1984-08-09 1986-03-03 Nissan Motor Co Ltd アンチスキツド制御装置
EP0313292A2 (fr) * 1987-10-21 1989-04-26 LUCAS INDUSTRIES public limited company Système de freinage anti-patinage pour véhicules
DE3813174A1 (de) * 1988-04-20 1989-11-02 Teves Gmbh Alfred Bremsdruckregelvorrichtung
DE3836082A1 (de) * 1988-10-22 1990-04-26 Teves Gmbh Alfred Blockiergeschuetzte hydraulische bremsanlage
EP0418602A2 (fr) * 1989-09-20 1991-03-27 Robert Bosch Gmbh Dispositif d'antiblocage

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DE2342307C2 (de) * 1973-08-22 1984-12-20 Robert Bosch Gmbh, 7000 Stuttgart Anordnung zur Überprüfung eines Antiblockierregelsystems für Fahrzeugbremsanlagen
US4865399A (en) * 1985-08-09 1989-09-12 Kelsey Hayes Company Vehicle anti-lock brake system
US4824188A (en) * 1988-01-21 1989-04-25 Hughes Aircraft Company Modulation arrangement for anti-lock brake system
DE3813172C2 (de) * 1988-04-20 1998-02-12 Teves Gmbh Alfred Blockiergeschützte hydraulische Bremsanlage
DE3818260C2 (de) * 1988-05-28 2000-08-03 Continental Teves Ag & Co Ohg Schaltungsanordnung zur Steuerung der Hilfsenergieversorgung einer hydraulischen schlupfgeregelten Bremsanlage
DE3828931A1 (de) * 1988-08-26 1990-03-01 Teves Gmbh Alfred Verfahren zur ueberwachung der funktion einer bremsanlage
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DE3842370A1 (de) * 1988-12-16 1990-06-21 Bosch Gmbh Robert Blockierschutzvorrichtung fuer eine fahrzeugbremsanlage
DE4003586C1 (fr) * 1990-02-07 1991-07-18 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE4020449A1 (de) * 1990-06-27 1992-01-02 Teves Gmbh Alfred Schaltungsanordnung fuer eine blockiergeschuetzte bremsanlage mit einem pedalwegschalter oder -wegsensor
DE4032876A1 (de) * 1990-10-17 1992-04-23 Teves Gmbh Alfred Elektromotorisch angetriebene hydraulische pumpe
DE4037142A1 (de) * 1990-11-22 1992-05-27 Bosch Gmbh Robert Elektromotorisch betriebene hydropumpe
DE4112137A1 (de) * 1991-04-13 1992-10-15 Bosch Gmbh Robert Hydraulische fremdkraft-bremsanlage mit blockierschutz- und antriebsschlupfregeleinrichtung, insbesondere fuer kraftfahrzeuge

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3404135A1 (de) * 1984-02-07 1985-08-14 Daimler-Benz Ag, 7000 Stuttgart Einrichtung zur nachspeisung von bremsfluessigkeit
JPS6144062A (ja) * 1984-08-09 1986-03-03 Nissan Motor Co Ltd アンチスキツド制御装置
EP0313292A2 (fr) * 1987-10-21 1989-04-26 LUCAS INDUSTRIES public limited company Système de freinage anti-patinage pour véhicules
DE3813174A1 (de) * 1988-04-20 1989-11-02 Teves Gmbh Alfred Bremsdruckregelvorrichtung
DE3836082A1 (de) * 1988-10-22 1990-04-26 Teves Gmbh Alfred Blockiergeschuetzte hydraulische bremsanlage
EP0418602A2 (fr) * 1989-09-20 1991-03-27 Robert Bosch Gmbh Dispositif d'antiblocage

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PATENT ABSTRACTS OF JAPAN vol. 10, no. 200 (M - 498)<2256> 12 July 1986 (1986-07-12) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997047503A1 (fr) * 1996-06-07 1997-12-18 Robert Bosch Gmbh Procede et circuit pour reguler un moteur de pompe dans un systeme de regulation d'un vehicule
EP1388476A2 (fr) * 2002-08-08 2004-02-11 Robert Bosch Gmbh Ensemble hydraulique pour système de freinage avec dispositif anti-blocage
EP1388476A3 (fr) * 2002-08-08 2004-03-24 Robert Bosch Gmbh Ensemble hydraulique pour système de freinage avec dispositif anti-blocage
EP1977943A3 (fr) * 2007-04-05 2010-09-08 FTE automotive GmbH Système de freinage hydraulique à antiblocage, en particulier pour motos
US8205949B2 (en) 2007-04-05 2012-06-26 Fte Automotive Gmbh Anti-lock hydraulic braking system, in particular for motorized two-wheel vehicles

Also Published As

Publication number Publication date
DE4232614A1 (de) 1994-03-31

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