WO1997047501A1 - Systeme de freinage avec unite d'actionnement de freinage actif - Google Patents

Systeme de freinage avec unite d'actionnement de freinage actif Download PDF

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Publication number
WO1997047501A1
WO1997047501A1 PCT/EP1997/003104 EP9703104W WO9747501A1 WO 1997047501 A1 WO1997047501 A1 WO 1997047501A1 EP 9703104 W EP9703104 W EP 9703104W WO 9747501 A1 WO9747501 A1 WO 9747501A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
brake
braking system
active brake
active
Prior art date
Application number
PCT/EP1997/003104
Other languages
German (de)
English (en)
Inventor
Gunther Buschmann
Original Assignee
Itt Manufacturing Enterprises, Inc.
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 Manufacturing Enterprises, Inc. filed Critical Itt Manufacturing Enterprises, Inc.
Publication of WO1997047501A1 publication Critical patent/WO1997047501A1/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
    • B60T8/24—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 vehicle inclination or change of direction, e.g. negotiating bends
    • B60T8/246—Change of direction
    • 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
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/1755—Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/30—ESP control system
    • B60T2270/313—ESP control system with less than three sensors (yaw rate, steering angle, lateral acceleration)

Definitions

  • the present invention relates to a brake system with a device for active brake application according to the preamble of claim 1.
  • Such a braking system is known for example from DE 42 41 59b ⁇ l. It is a hydraulic vehicle brake system which has an anti-lock device and is further developed to improve the vehicle's lane behavior, in particular in bends, by means of active brake actuation.
  • a pressure source supplies pressure medium to an anti-lock device, by means of which brake pressures can be individually adjusted in the wheel brakes.
  • the auxiliary pressure source and the anti-lock device there are cylinders with separating pistons for building up pressure in the front axle and in the rear axle brake circuit, the separating pistons being provided with valve openings which interact with lip seals.
  • An active brake actuation serves to stabilize the vehicle, more "ie a Uber-steer tendency or an Untersteue- runqstendenz or a risk of skidding or an already e ⁇ nq Q treLenen spin counter.
  • a method for determining such a size relevant to driving dynamics is known, for example, from DE 42 00 061 AI.
  • a method for determining the transverse vehicle speed and / or the slip angle is proposed here.
  • sensors are required for the steering angle of the front wheels and possibly the rear wheels, for the individual wheel speeds for determining a vehicle reference speed, for the yaw angle speed and for the vehicle lateral acceleration.
  • a transverse acceleration sensor it is proposed to measure or estimate the brake pressures on the wheels.
  • a generic brake system which is to be suitable for active brake actuation and carries out a corresponding evaluation of the current driving situation, therefore requires a relatively high additional effort in the form of additional hydraulics for the selective active brake pressure build-up, this optionally being carried out on one or more of the four wheels should, and additional sensors such as yaw rate sensor, steering wheel angle sensor or wheel steering angle sensor, lateral acceleration sensor and brake pressure sensors at least in the main brake lines of the brake circuits.
  • the present invention is based on the object of proposing a braking system of the type mentioned at the outset which is also suitable for use in small and very small cars, that is to say it is very inexpensive and can be produced and installed with little effort and without significant losses in driving to accept safety.
  • the principle of the present invention lies in the fact that, particularly in small and very small cars, critical driving behavior usually occurs due to oversteer of the vehicle. Understeering - especially under load - is a minor problem in the generally weakly motorized small vehicles.
  • the invention thus limits the braking system to measures that are necessary to prevent oversteering. Because of the less critical situation in the case of understeering, those functions which are primarily necessary against the understeering are omitted. This means that both hydraulics and sensors can be made simpler and cheaper. It is no longer necessary, for example, to detect the yaw rate of the vehicle, but rather it is sufficient to ascertain whether the rear part breaks out when driving through a curve. An entry criterion in an active brake application can therefore be the lateral acceleration of the rear of the vehicle if it exceeds a certain threshold.
  • a brake system according to the invention can therefore be equipped in such a way that only the front axle, which is driven anyway in small cars, is provided with the possibility of active brake actuation. If, for example, there is a front axle / brake axle brake circuit division in a hydraulic brake system, it is sufficient to use a brake system known per se for traction control for active brake actuation for the purpose of stabilizing the driving behavior. The brake axle brake circuit would then only be equipped with a blocking protection function.
  • a traction-slip-controlled brake system would be suitable, since such a brake system allows active brake pressure build-up on the front axle and, during such an intervention, separates the master axle brakes from the auxiliary pressure source during such an intervention.
  • the lateral acceleration of the rear of the vehicle is suitable as a criterion for recognizing oversteer, it is sufficient to provide a lateral acceleration sensor as the only sensor for detecting the driving dynamics when cornering, which sensor is installed as far back as possible in the vehicle.
  • a yaw rate sensor can be omitted. To combat understeer, it is not necessary to determine whether or not a measured yaw rate is following a predetermined target yaw rate. It is characteristic of the oversteering of a vehicle that the rear of the vehicle breaks out, so that the lateral acceleration sensor, which is installed in the rear of the vehicle, provides reliable information about the need for control intervention.
  • a brake system equipped for traction control is upgraded in an inexpensive manner to a braking system which is used for active brake actuation for the purpose of stabilizing the driving behavior of the vehicle in a curve Is provided .
  • the advantage of a brake system according to the invention is thus the reduction of the effort compared to known brake systems with devices for active braking.
  • the driving behavior in critical situations is significantly improved compared to brake systems that are exclusively equipped with an anti-lock and traction control function. Only in those driving situations that are not highly critical anyway and are more likely to be mastered by the driver is there no active intervention by brake actuation. Oversteering, which, in contrast to understeering, cannot be mastered so easily by the driver of the vehicle, is certainly prevented.

Abstract

L'invention concerne un système de freinage pour stabiliser un véhicule dans les virages, ledit système étant particulièrement peu onéreux et pouvant être fabriqué et monté facilement, de façon à pouvoir être adapté notamment à des voitures compactes. Le survirage posant un problème plus grand sur ce type de véhicule que le sous-virage, plus facile à contrôler par le conducteur, ce système de freinage se limite à une opération de régulation uniquement en cas de tendance au survirage. Ce système ne comprend pas les détecteurs et fonctions nécessaires essentiellement pour lutter contre le sous-virage, tels qu'un détecteur de vitesse angulaire de lacet. On installe à la place, le plus à l'arrière possible du véhicule, un détecteur d'accélération transversale, afin de détecter l'accélération transversale de l'arrière du véhicule. Si l'accélération transversale de l'arrière du véhicule dépasse un seuil prédéterminé, pouvant dépendre de la vitesse ou de l'angle de braquage, une régulation est effectuée sur la roue avant située à l'extérieur du virage.
PCT/EP1997/003104 1996-06-13 1997-06-13 Systeme de freinage avec unite d'actionnement de freinage actif WO1997047501A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19623596.0 1996-06-13
DE1996123596 DE19623596A1 (de) 1996-06-13 1996-06-13 Bremssystem mit einer Einrichtung zur aktiven Bremsbetätigung

Publications (1)

Publication Number Publication Date
WO1997047501A1 true WO1997047501A1 (fr) 1997-12-18

Family

ID=7796853

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/003104 WO1997047501A1 (fr) 1996-06-13 1997-06-13 Systeme de freinage avec unite d'actionnement de freinage actif

Country Status (2)

Country Link
DE (1) DE19623596A1 (fr)
WO (1) WO1997047501A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999039953A1 (fr) * 1998-02-07 1999-08-12 Continental Teves Ag & Co. Ohg Procede et dispositif pour la detection d'un virage, en particulier d'un virage survire, et pour la stabilisation d'un vehicule en cas de virage survire
EP1149006B1 (fr) 1999-02-01 2013-03-13 Continental Teves AG & Co. oHG Procede et dispositif de surveillance de detecteurs, en particulier pour un systeme esp pour vehicules
DE19939872B4 (de) * 1999-02-01 2012-07-26 Continental Teves Ag & Co. Ohg Verfahren und Vorrichtung zur Sensorüberwachung insbesondere für ein ESP-System für Fahrzeuge
DE10102002A1 (de) * 2001-01-18 2002-07-25 Bosch Gmbh Robert Verfahren und Vorrichtung zum Koordinieren von Eingriffen in das Fahrverhalten eines Fahrzeugs
DE102008038642A1 (de) * 2007-08-16 2009-02-19 Continental Teves Ag & Co. Ohg System und Verfahren zum Stabilisieren eines Kraftfahrzeugs

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165858A1 (fr) * 1984-06-07 1985-12-27 Automobiles Peugeot Installation de freinage pour véhicule automobile, comportant un élément sensible à l'accélération transversale
FR2626830A1 (fr) * 1988-02-05 1989-08-11 Etudes Realis Automobile Dispositif assurant la gestion de l'adherence en freinage
DE4200061A1 (de) * 1992-01-03 1993-07-08 Bosch Gmbh Robert Verfahren zur bestimmung der fahrzeugquergeschwindigkeit und/oder des schwimmwinkels
US5275475A (en) * 1990-08-23 1994-01-04 Robert Bosch Gmbh Method for controlling vehicle dynamics
DE4241595A1 (de) * 1992-12-10 1994-06-16 Bosch Gmbh Robert Hydraulische Fahrzeugbremsanlage mit Blockierschutzeinrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4219750B4 (de) * 1992-06-17 2005-10-27 Robert Bosch Gmbh Antiblockierregelsystem
DE4221030C2 (de) * 1992-06-26 2002-06-13 Bosch Gmbh Robert Verfahren zum Erkennen der Situation eines Fahrzeugs
DE4225983C2 (de) * 1992-08-06 2002-03-14 Bosch Gmbh Robert Verfahren zur Bremsung von Fahrzeugrädern

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165858A1 (fr) * 1984-06-07 1985-12-27 Automobiles Peugeot Installation de freinage pour véhicule automobile, comportant un élément sensible à l'accélération transversale
FR2626830A1 (fr) * 1988-02-05 1989-08-11 Etudes Realis Automobile Dispositif assurant la gestion de l'adherence en freinage
US5275475A (en) * 1990-08-23 1994-01-04 Robert Bosch Gmbh Method for controlling vehicle dynamics
DE4200061A1 (de) * 1992-01-03 1993-07-08 Bosch Gmbh Robert Verfahren zur bestimmung der fahrzeugquergeschwindigkeit und/oder des schwimmwinkels
DE4241595A1 (de) * 1992-12-10 1994-06-16 Bosch Gmbh Robert Hydraulische Fahrzeugbremsanlage mit Blockierschutzeinrichtung

Also Published As

Publication number Publication date
DE19623596A1 (de) 1997-12-18

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