WO2007140996A1 - Installation de régulation de freinage pour véhicules automobiles - Google Patents

Installation de régulation de freinage pour véhicules automobiles Download PDF

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Publication number
WO2007140996A1
WO2007140996A1 PCT/EP2007/004996 EP2007004996W WO2007140996A1 WO 2007140996 A1 WO2007140996 A1 WO 2007140996A1 EP 2007004996 W EP2007004996 W EP 2007004996W WO 2007140996 A1 WO2007140996 A1 WO 2007140996A1
Authority
WO
WIPO (PCT)
Prior art keywords
parking brake
brake
vehicle
brake function
friction
Prior art date
Application number
PCT/EP2007/004996
Other languages
German (de)
English (en)
Inventor
Günther SOKOLL
Original Assignee
Bayerische Motoren Werke
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 Bayerische Motoren Werke filed Critical Bayerische Motoren Werke
Publication of WO2007140996A1 publication Critical patent/WO2007140996A1/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
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B60T7/122—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger for locking of reverse movement
    • 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
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/06—Hill holder; Start aid systems on inclined road

Definitions

  • the invention relates to a brake control system for motor vehicles according to the preamble of patent claim 1.
  • automatic Parking brake functions for example, a hydraulic, mechanical, electro-hydraulic, electro-mechanical or pneumatic, electronically controllable braking system, by means of which the detention and the prevention of the rolling of the vehicle is accomplished. Also, methods are known in which the rolling of the vehicle via the transmission (in particular automatic transmission) is prevented.
  • activation of the function is carried out, for example, by actuation of the brake pedal or the handbrake or by means of switching elements or other actuating elements (eg switches, buttons or the like) connected thereto; Deactivation takes place via the same or other aids (such as, for example, accelerator pedal position, clutch signal, drive torque signals of the engine or the like or also after a defined holding time has elapsed).
  • control signals or switching means for displaying the functions are, for example, usually one or more speed signals for detecting the vehicle standstill, mechanical, pneumatic or hydraulic actuators (in principle, electro-hydraulic, electro-pneumatic or electric actuators are also conceivable) the wheel brakes or in the supply lines to the wheel brakes, on the braking effect up and dismantled or at least temporarily be held (eg., Control / control valves integrated in the form of an existing control or regulating device, such as ABS, ASC / ASR, DSC / ESP / EHB system), if necessary also
  • Leksbeatungs- or inclination sensors by means of which the road lenght is determined and from it the required braking force for safe stop of the vehicle and the start required for the road inclination starting torque can be determined and one or more pressure sensors, with the help of the brake pressure or the applied braking torque to the or The wheel brakes can be determined. It is an object of the invention to improve the transition from a parking brake function in a starting process.
  • Patent claim 1 solved.
  • Advantageous developments of the invention are the subject matters of the dependent claims.
  • Motor vehicle an automatic parking brake function can be activated, their deactivation is usually made when reaching a predetermined release condition (eg.
  • the control unit which can receive both sensor signals and data by data bus connections to other control units as input signals, the coefficient of friction of the roadway at the location of the held by the parking brake function motor vehicle can be determined.
  • the coefficient of friction (or a coefficient directly or indirectly proportional to the coefficient of friction) can be measured, calculated or estimated directly or indirectly.
  • the brake pressure which was built up for the parking brake function, at least on a driven wheel, in which a coefficient of friction was determined below a predetermined threshold, converted into a brake pressure, which prevents rolling away in the longitudinally inclined roadway or the Reaching a start, in particular by conversion into the traction control at very low coefficient of friction, is required.
  • the term brake pressure should also any analog or generalizing size, such.
  • the braking torque to be understood which can be made effective for braking a wheel, for example, with electrical, hydraulic and / or electro-hydraulic means.
  • the coefficient of friction of the road at the location of the detected motor vehicle is determined radselektiv at least for the driven wheels.
  • a so-called ⁇ -split situation can be recognized, ie, for example, a left driven wheel on a high friction road and a right driven wheel on a low friction road (eg, roadside gravel, ice track, etc.) or vice versa.
  • the invention is particularly advantageous.
  • the brake pressure of the wheel / wheels located on the low-friction-value roadway is kept longer or converted into a brake pressure, which is required to achieve a start-up, in particular by transferring into the traction control system with a very low coefficient of friction.
  • Low friction value should not be deactivated in such a way that initially the entire brake pressure is reduced at all wheels and therefore brake pressure must be re-established at least partially when slip occurs again.
  • the invention is intended both to increase comfort and to accelerate start-up by improving traction.
  • the criterion for the release condition of the parking brake function is generally a starting condition, which is equivalent to a
  • Detection of the start request is. For example, the position of the accelerator pedal and / or the difference between the momentarily achieved drive torque and the currently present downgrade torque of the vehicle can be evaluated for the detection of the approach request.
  • the downgrade torque can z. B. by means of a road gradient signal or a Lane acceleration signal or the required braking torque for holding the vehicle to be derived on a slope.
  • the predetermined by the parking brake function braking torque at the wheel brakes (in a hydraulic brake system generated by corresponding Radbremstik) according to predetermined conditions and according to a defined procedure is normally completely reduced in the prior art. If a slip situation then develops on the vehicle side, at least on one drive wheel, which is interpreted by the control / regulation unit as a low- ⁇ or ⁇ -split situation, a braking torque or locking torque then ensues on the drive wheels according to a defined calculation and execution algorithm generated.
  • the braking torque build-up can be z. B.
  • a locking torque can also be applied via switchable / controllable locks and clutch systems in the drive train.
  • the general aim of the invention is therefore, in the cases as described above (starting from a stand especially on longitudinally inclined roads in the direction of uphill with low ⁇ or ⁇ split ratios) during the system transition a continuous braking torque curve (brake pressure curve) in at least ensure a wheel brake, so that one or more brake torque-free (non-pressurized) wheel brakes are avoided to prevent accidental rolling of the vehicle.
  • a continuous braking torque curve brake pressure curve
  • a prerequisite for improving the system transition is the preferably wheel-selective detection of a low-friction road on which the vehicle or its wheels are located at the time directly before the starting situation (requirement 1).
  • a longitudinally inclined roadway should be determined as far as possible with precise knowledge of the degree of roadway inclination (condition 2) in order to better estimate the effects of the low friction value
  • Road surface scanning, touching or non-contact sensors eg. B. by light-optical systems, radar, lidar, etc.
  • FahrbahnSullivans- or. Reibwerterkennung or Reibwert part of the previous driving situation, z.
  • Example in particular from the situation shortly before the stopping and stalling of the vehicle when, for example, via skid detection on one or more wheels (d. hz B. when defined absolute or relative Radschlupfschwellen, Radschlupfgradienten o. ⁇ .) - possibly in conjunction with a symmetrical or asymmetric control situation occurred there (ABS, ASC, .7) to a homogeneous or ⁇ -split friction coefficient distribution can be closed.
  • Condition 2 is given, for example, in the case of the vehicle-side presence of a longitudinal acceleration sensor or a tilt sensor, as is often the case in modern stability and brake control systems.
  • the prerequisites 1 and preferably also 2 are recognized in the control unit, then it is possible to perform a braking torque control / regulation on at least one wheel brake during the system transition from the parking brake function, in particular for traction control, in such a way that unintentional rolling up of the vehicle is avoided.
  • a "braking torque transfer" from the retaining function to the traction control, at least on the drive wheel or on the drive wheels, at which / which is expected to be in the course of the onset of traction control anyway braking torque or
  • Locking torque must be established. This serves for dead time reduction or avoidance and thus ultimately for improving the traction performance.
  • different braking torque transfer and braking torque control strategies are possible in principle: maintaining or at least partially maintaining the braking torque (brake pressure), for example
  • the release of the braking torque is carried out as needed and accurately at a sufficiently high starting torque, so that the vehicle on the one hand not unintentionally contrary to the desired . Can roll away the direction of travel and on the other hand receives too little driving force for starting due to the occurrence of excessive slip.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

L'invention concerne une installation de régulation de freinage pour véhicules automobiles, comprenant un appareil de commande électronique qui permet d'activer, à l'arrêt du véhicule automobile, une fonction de frein de stationnement automatique, dont la désactivation s'effectue habituellement à l'obtention d'une condition de desserrage prédéterminée. Au moyen de l'appareil de commande, qui peut obtenir des signaux de détection ainsi que des données par des connexions par bus de données à d'autres unités de commande sous forme de signaux d'entrée, on peut déterminer le coefficient de frottement de la route à l'endroit où se trouve le véhicule automobile maintenu à l'arrêt par la fonction de frein de stationnement. En l'occurrence, le coefficient de frottement peut être mesuré, calculé ou estimé directement ou indirectement. En présence de la condition de desserrage, la pression de freinage qui a été appliquée pour la fonction de frein de stationnement, est au moins convertie selon l'invention au niveau d'une roue entraînée pour laquelle un coefficient de frottement en dessous d'un seuil prédéterminé a été déterminé, en une pression de freinage qui est nécessaire pour empêcher le roulement lorsque la route est en pente, ou qui est nécessaire pour obtenir un démarrage, notamment par conversion en régulation de glissement d'entraînement dans le cas d'un coefficient de frottement très faible.
PCT/EP2007/004996 2006-06-08 2007-06-05 Installation de régulation de freinage pour véhicules automobiles WO2007140996A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006026626.9A DE102006026626B4 (de) 2006-06-08 2006-06-08 Bremsregelungsanlage für Kraftfahrzeuge
DE102006026626.9 2006-06-08

Publications (1)

Publication Number Publication Date
WO2007140996A1 true WO2007140996A1 (fr) 2007-12-13

Family

ID=38663703

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/004996 WO2007140996A1 (fr) 2006-06-08 2007-06-05 Installation de régulation de freinage pour véhicules automobiles

Country Status (2)

Country Link
DE (1) DE102006026626B4 (fr)
WO (1) WO2007140996A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119484A1 (fr) * 2007-04-02 2008-10-09 Bayerische Motoren Werke Aktiengesellschaft Système de régulation de freinage pour automobiles
CN111645693A (zh) * 2019-02-18 2020-09-11 丰田自动车株式会社 车辆控制装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015212948A1 (de) 2015-07-10 2017-01-12 Bayerische Motoren Werke Aktiengesellschaft Antriebsmomentenkompensation bei μ-Split Situationen
DE102017205892A1 (de) 2017-04-06 2018-10-11 Bayerische Motoren Werke Aktiengesellschaft Bremsregelungssystem für Kraftfahrzeuge
DE102022125801A1 (de) * 2022-10-06 2024-04-11 Audi Aktiengesellschaft Verfahren zum Betrieb eines Kraftfahrzeugs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19950028A1 (de) * 1999-10-09 2001-04-12 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung eines Fahrzeugs
DE102004060255A1 (de) * 2003-12-17 2005-07-28 Continental Teves Ag & Co. Ohg Verfahren zur Verhinderung des Wegrollens eines Fahrzeugs
DE102005015062A1 (de) * 2004-03-31 2006-02-23 Continental Teves Ag & Co. Ohg Verfahren zum Ermitteln eines Fahrzeugstillstands

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DE19611359C1 (de) * 1996-03-22 1997-08-28 Daimler Benz Ag Verfahren zum Verhindern unbeabsichtigten Wegrollens eines Fahrzeugs
DE19941482B4 (de) * 1998-09-30 2017-11-09 Robert Bosch Gmbh Vorrichtung und Verfahren zur Verhinderung des Rückwärtsrollens eines an einem Hang befindlichen Fahrzeuges
DE19848448C2 (de) * 1998-10-21 2001-12-13 Daimler Chrysler Ag Bremsdruck-Steuerungseinrichtung einer Bremsanlage eines Straßenfahrzeuges
DE19950034B4 (de) * 1999-10-16 2019-09-26 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung einer Bremsanlage
DE19950162B4 (de) * 1999-10-19 2004-01-29 Daimlerchrysler Ag Verfahren zur Verhinderung des Wegrollens eines Fahrzeugs beim Anfahren
DE10151846B4 (de) * 2000-10-24 2004-07-15 Daimlerchrysler Ag Verfahren zum Verhindern eines unbeabsichtigten Wegrollens eines stillstehenden Fahrzeuges
DE102006021652A1 (de) 2005-05-12 2006-11-23 Continental Teves Ag & Co. Ohg Verfahren und Vorrichtung zum Unterstützen eines Anfahrvorgangs

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19950028A1 (de) * 1999-10-09 2001-04-12 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung eines Fahrzeugs
DE102004060255A1 (de) * 2003-12-17 2005-07-28 Continental Teves Ag & Co. Ohg Verfahren zur Verhinderung des Wegrollens eines Fahrzeugs
DE102005015062A1 (de) * 2004-03-31 2006-02-23 Continental Teves Ag & Co. Ohg Verfahren zum Ermitteln eines Fahrzeugstillstands

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119484A1 (fr) * 2007-04-02 2008-10-09 Bayerische Motoren Werke Aktiengesellschaft Système de régulation de freinage pour automobiles
US7845739B2 (en) 2007-04-02 2010-12-07 Bayerische Motoren Werke Aktiengesellschaft Brake regulation system for motor vehicles
CN111645693A (zh) * 2019-02-18 2020-09-11 丰田自动车株式会社 车辆控制装置

Also Published As

Publication number Publication date
DE102006026626B4 (de) 2024-03-07
DE102006026626A1 (de) 2007-12-13

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