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WO2000010855A1 - Freins hydrauliques avec systeme antipatinage - Google Patents

Freins hydrauliques avec systeme antipatinage Download PDF

Info

Publication number
WO2000010855A1
WO2000010855A1 PCT/EP1999/006005 EP9906005W WO0010855A1 WO 2000010855 A1 WO2000010855 A1 WO 2000010855A1 EP 9906005 W EP9906005 W EP 9906005W WO 0010855 A1 WO0010855 A1 WO 0010855A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake system
hydraulic
check valve
motor
pump
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
PCT/EP1999/006005
Other languages
German (de)
English (en)
Inventor
Peter Drott
Hans-Jörg Feigel
Jan Hoffmann
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 DE19859072A external-priority patent/DE19859072A1/de
Application filed by Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of WO2000010855A1 publication Critical patent/WO2000010855A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
    • 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
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
    • 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
    • B60T8/341—Systems characterised by their 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
    • B60T8/40—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
    • B60T8/4013—Fluid pressurising means for more than one fluid circuit, e.g. separate pump units used for hydraulic booster and anti-lock braking
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/48—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
    • B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
    • B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
    • B60T8/4863—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
    • B60T8/4872—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems

Definitions

  • the invention relates to a hydraulic brake system with a slip control system, which comprises a motor and a hydraulic pump which can be driven thereby, with at least one displacement space, and with a damping chamber connected to a pressure side of the hydraulic pump, the motor being provided for driving an auxiliary energy pump.
  • the auxiliary power pump will in many cases be a vacuum pump, since in modern injection engines there is generally no source available for generating a sufficiently high vacuum.
  • a vacuum pump also requires a drive motor. Since such an engine incurs additional costs and would also have to create corresponding space, a possibility was sought to use an existing engine.
  • the motor that drives the hydraulic pump (s) required for this control system is suitable for this. Since the slip control is only relatively rarely active, the motor is also only used relatively weakly and could therefore use its free capacities to drive a vacuum pump or the like. provide.
  • the invention is therefore based on the object of creating a hydraulic brake system with a slip control system of the type mentioned, in which these pulsations are substantially less or eliminated.
  • a first check valve device is arranged at an outlet of the damping chamber, with which hydraulic fluid penetration into the displacement chamber is prevented when the brake system is actuated.
  • a second check valve device is preferably arranged between the pressure side of the hydraulic pump and the damping chamber.
  • the first check valve device is preferably a ball check valve, which can have a sealing body made of an elastomer.
  • a first sensor device can be provided with which the motor can be deactivated when an actuation of the brake system is detected.
  • a second sensor device is preferably used to detect a vacuum pressure generated by the vacuum pump in the brake system and to deactivate the motor when the vacuum pressure falls below a predetermined value.
  • Fig. 1 is a schematic diagram of the hydraulic control unit of such a brake system.
  • the brake system comprises a master cylinder 1, which can be operated via a brake pedal 3 and a brake booster 4.
  • a hydraulic reservoir 2 is connected to the master cylinder 1 in a known manner.
  • Two brake circuits 100, 200 are connected to the master cylinder 1 via a first line 5 or a second line 6.
  • Two wheel brakes 7, 8 and 9, 10 are actuated via each brake circuit. Since the brake circuits are constructed identically, only one brake circuit to be discribed. However, these explanations also apply in the same way to the other brake circuit.
  • the first line 5 is guided in the brake circuit 100 via a first, normally open isolating valve 11 and then branches into a first braking branch 51 and a second braking branch 52.
  • a first, normally open inlet valve 12 for the wheel brake 7 and a first, normally closed exhaust valve 13, the output of which is connected to a low-pressure accumulator 16.
  • the second brake branch 52 is guided into the low-pressure accumulator 16 via a second, normally open inlet valve 14 for the wheel brake 8 and a second, normally closed outlet valve 15.
  • a hydraulic pump 18 To empty the low-pressure accumulator 16, it is connected to the suction side of a hydraulic pump 18, which is separated from the first line 5 by a second, normally open, isolation valve 17.
  • the pressure side of the hydraulic pump 18 is connected via a damping chamber 19 to the junction between the first and second brake branches 51, 52.
  • the outlet of the damping chamber 19 located at the branch is secured with a first check valve 20 against the ingress of hydraulic fluid.
  • a second check valve 18a lies between the inlet of the damping chamber 19 and the pressure side of the hydraulic pump 18, while the suction side of the hydraulic pump 18 is connected to the low-pressure accumulator 16 via a third check valve 18b.
  • the hydraulic pump 18 is driven by a motor 21.
  • the motor 21 simultaneously drives an auxiliary energy pump 22, which in the case shown is a vacuum pump " acts, which serves to maintain a vacuum with which the brake booster 4 is operated.
  • this hydraulic brake system is activated by actuating the brake pedal 3, as a result of which the hydraulic pressure in the brake branches 51, 52 increases and the wheel brakes engage. As soon as one of the wheels threatens to lock, the corresponding outlet valve 13; 15 opened and the hydraulic pressure reduced via the low pressure accumulator 16.
  • the motor 21 is started, for example by means of a pressure sensor (not shown), so that the hydraulic pump 18 conveys the hydraulic fluid present in the low-pressure accumulator 16 back into the brake circuit via the damping chamber 19.
  • the motor 21 is also activated when the vacuum generated with the vacuum pump 22 no longer has the required negative pressure.
  • the hydraulic pump 18 naturally also runs when the low-pressure accumulator 16 is empty.
  • the first check valve 20 blocks the outlet of the damping chamber 19 and thereby prevents hydraulic fluid from entering the displacement chamber of the hydraulic pump 18 via the damping chamber 19. The pulsation noises mentioned at the beginning cannot therefore arise.
  • a first sensor device 30 can be provided as an additional measure, with which an actuation of the brake pedal 3 or the master cylinder 1 is detected.
  • the first sensor device deactivates the motor 21 and thus the hydraulic pump 18, so that even if both the first and the second check valve 20, 18a are defective, no pulsation noises can occur.
  • a second sensor device 31 can be provided with which the vacuum pressure is detected and, if necessary, the deactivation of the motor 21 is canceled.
  • the first check valve can of course also be used if the motor is not intended to drive an auxiliary power pump or is to be retrofitted with such a pump only later. In this case, the first check valve relieves the second check valve in that the pressure drop is now distributed over two valves.

Landscapes

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

Abstract

L'invention concerne un dispositif de freinage hydraulique. Le dispositif comporte un système antipatinage qui comprend un moteur (21) et une pompe hydraulique (18) pouvant être entraînée par ledit moteur et comportant au moins une chambre de compression, ainsi qu'une chambre d'amortissement (19) reliée au côté pression de la pompe (18). Il est caractérisé notamment par le fait qu'à une sortie de la chambre d'amortissement (19) est disposé un premier clapet anti-retour (20) qui empêche, lors de l'actionnement du dispositif de freinage, l'arrivée du fluide hydraulique dans la chambre de compression.
PCT/EP1999/006005 1998-08-18 1999-08-17 Freins hydrauliques avec systeme antipatinage Ceased WO2000010855A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19837371.6 1998-08-18
DE19837371 1998-08-18
DE19859072A DE19859072A1 (de) 1998-08-18 1998-12-21 Hydraulische Bremsanlage mit Schlupfregelsystem
DE19859072.5 1998-12-21

Publications (1)

Publication Number Publication Date
WO2000010855A1 true WO2000010855A1 (fr) 2000-03-02

Family

ID=26048222

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/006005 Ceased WO2000010855A1 (fr) 1998-08-18 1999-08-17 Freins hydrauliques avec systeme antipatinage

Country Status (1)

Country Link
WO (1) WO2000010855A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2128168A1 (de) * 1971-06-07 1972-12-14 Teldix Gmbh Antiblockierregelsystem für Fahrzeuge
WO1990011212A1 (fr) * 1989-03-21 1990-10-04 Alfred Teves Gmbh Systeme hydraulique de freinage antiblocage
WO1991005688A1 (fr) * 1989-10-19 1991-05-02 Robert Bosch Gmbh Systeme de freinage
DE4321787A1 (de) * 1992-07-25 1994-03-03 Wolter Hans Kugelrückschlagventil
WO1995031362A1 (fr) * 1994-05-16 1995-11-23 Itt Automotive Europe Gmbh Systeme de freinage pour vehicules a moteur a servofrein pneumatique
WO1997018114A1 (fr) * 1995-11-15 1997-05-22 Lucas Industries Plc Systeme de freinage a commande electronique pour vehicules a moteur
WO1997018977A1 (fr) * 1995-11-18 1997-05-29 Itt Automotive Europe Gmbh Systeme de freinage hydraulique pour automobile a regulation antipatinage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2128168A1 (de) * 1971-06-07 1972-12-14 Teldix Gmbh Antiblockierregelsystem für Fahrzeuge
WO1990011212A1 (fr) * 1989-03-21 1990-10-04 Alfred Teves Gmbh Systeme hydraulique de freinage antiblocage
WO1991005688A1 (fr) * 1989-10-19 1991-05-02 Robert Bosch Gmbh Systeme de freinage
DE4321787A1 (de) * 1992-07-25 1994-03-03 Wolter Hans Kugelrückschlagventil
WO1995031362A1 (fr) * 1994-05-16 1995-11-23 Itt Automotive Europe Gmbh Systeme de freinage pour vehicules a moteur a servofrein pneumatique
WO1997018114A1 (fr) * 1995-11-15 1997-05-22 Lucas Industries Plc Systeme de freinage a commande electronique pour vehicules a moteur
WO1997018977A1 (fr) * 1995-11-18 1997-05-29 Itt Automotive Europe Gmbh Systeme de freinage hydraulique pour automobile a regulation antipatinage

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