WO2002058977A1 - Procede et dispositif de regulation de l'etablissement de pression d'un systeme de freinage a reglage electronique - Google Patents

Procede et dispositif de regulation de l'etablissement de pression d'un systeme de freinage a reglage electronique Download PDF

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Publication number
WO2002058977A1
WO2002058977A1 PCT/EP2002/000480 EP0200480W WO02058977A1 WO 2002058977 A1 WO2002058977 A1 WO 2002058977A1 EP 0200480 W EP0200480 W EP 0200480W WO 02058977 A1 WO02058977 A1 WO 02058977A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
pressure build
pressure
driver
derived therefrom
Prior art date
Application number
PCT/EP2002/000480
Other languages
German (de)
English (en)
Inventor
Ralph Gronau
Tobias Scheller
Ralf Reviol
Andreas Neu
Original Assignee
Continental Teves Ag & 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 DE10156401A external-priority patent/DE10156401A1/de
Application filed by Continental Teves Ag & Co.Ohg filed Critical Continental Teves Ag & Co.Ohg
Publication of WO2002058977A1 publication Critical patent/WO2002058977A1/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
    • B60T8/441—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 using hydraulic boosters
    • B60T8/442—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 using hydraulic boosters the booster being a fluid return pump, e.g. in combination with a brake pedal force booster
    • 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
    • B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
    • 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
    • B60T13/72—Electrical control in fluid-pressure brake systems in vacuum systems or vacuum booster units

Definitions

  • the invention relates to a method for controlling the pressure build-up in an electronically controlled brake system, preferably for motor vehicles, having a master brake cylinder, in particular tandem master cylinder (THZ), a vacuum brake booster (Booster), at least one further source of pressure for braking force support, which is controllable by a control unit 'and with the pressure of which the vehicle's wheel brakes can be applied and with a device for detecting the driver's deceleration request.
  • a master brake cylinder in particular tandem master cylinder (THZ)
  • Booster vacuum brake booster
  • the invention also relates to a device for regulating the pressure build-up in an electronically controllable brake system for preferably motor vehicles, with a master brake cylinder, a vacuum brake booster, at least one further pressure source having a pump, which can be controlled by a control unit and with the pressure of which the vehicle's wheel brakes can be acted upon and with a device for detecting the driver deceleration request.
  • Hydraulic vehicle brake systems are known in which braking force support is essentially increased by means of a vacuum brake booster and additionally by a pump.
  • the pump can be one
  • BESTATIGUNGSKOPIE Vacuum pump to improve the vacuum in the booster or a hydraulic pump can be used to increase the hydraulic pressure in the braking system.
  • a pattern or a program for controlling the further pressure source and / or one or more valves is defined in a method before the activation of the further pressure source and / or one or more valves in accordance with a recognized driver deceleration request or variables derived therefrom which pattern or program enables a brake pressure build-up with a specific, predetermined brake pressure build-up characteristic essentially corresponding to the driver's deceleration request or variables derived therefrom.
  • the brake pressure (boost) is determined and set before a control deviation is formed.
  • the driver's foot force on the brake pedal can increase the pressure in the system and thus the wheel brake pressure by a corresponding factor without (noticeable) deceleration.
  • the determined, predetermined brake pressure build-up characteristic essentially corresponds to a brake pressure build-up characteristic of a booster, with this “simulated” booster advantageously having a higher modulation point than the booster present in the brake system. If necessary, the amplification factor can also be increased.
  • the driver deceleration request or variables derived therefrom is determined on the basis of a gradient of the brake pressure build-up by the booster or variables derived therefrom. According to the invention, there is therefore an assumption that the brake pressure build-up by the driver is continuous, i.e. with a constant gradient. This makes it possible to determine the gradient of the start (driver's brake application) in the phase in which the additional pressure support is still present.
  • a change in the pressure build-up gradient is taken into account and / or that the pattern or program is predetermined or is determined on the basis of predetermined variables.
  • control unit has a setting unit for defining a pattern or a program for controlling the further pressure source and / or one or more valves in accordance with a recognized driver deceleration request or variables derived therefrom prior to controlling the further pressure source and / or one or more valves, the pattern or Program enables a brake pressure build-up with a specific, predetermined brake pressure build-up characteristic essentially corresponding to the driver's deceleration request or variables derived therefrom.
  • the specific, predetermined brake pressure build-up characteristic essentially corresponds to a brake pressure build-up characteristic of a booster with, in particular, a higher modulation point.
  • the driver deceleration request or variables derived therefrom is determined on the basis of a gradient of the brake pressure build-up or variables derived therefrom. These are determined in accordance with suitable sensors, preferably by pressure sensors which reflect the pressure in the THZ.
  • the pattern or program is predetermined or is determined on the basis of predetermined variables. These are determined in accordance with suitable sensors, preferably by vacuum sensors or displacement sensors on / in the booster. At least one hydraulic pump is preferably used as the pump for the further pressure source, alone or in combination with a hydraulic pressure accumulator.
  • the figure shows the course of the hydraulic excess pressure P of a hydraulic vehicle brake as a function of the pedal force F which the driver exerts on the brake pedal.
  • the braking force on the wheels of the vehicle is linearly dependent on this excess pressure P.
  • the dashed line represents the course of the overpressure when only the booster amplifies it.
  • the pressure rises linearly up to a pressure Pl at a force Fl.
  • This point corresponds to a first modulation point of the booster. From this point on, a further increase in pressure is only possible through a considerably larger pedal force F.
  • the pilot pressure Pl is. depending on the size of the braking device, the diameter of a flanged master brake cylinder and the vacuum level generated by the drive motor of the vehicle.
  • the modulation point can preferably be identified by means of one or two vacuum pressure sensors in the booster. From the signals of the Vacuum pressure sensors in the booster can also approximately determine the pressure in the flanged master brake cylinder, in particular tandem master brake cylinder (THZ), which is reached at the control point and which requires hydraulic support. This is achieved by means of a characteristic curve of the booster stored in an electronic memory. The hydraulic pressure in the THZ is also sensed by pressure sensors.
  • THZ tandem master brake cylinder
  • a further pressure source is activated according to the invention and a pattern or a program for activating the further pressure source and / or a valve is determined in accordance with a recognized driver deceleration request or variables derived therefrom.
  • This pattern or program enables a brake pressure build-up that corresponds essentially to the driver's deceleration request or variables derived therefrom.
  • the excess pressure is increased continuously from the first modulation point at Pl and with the same gradient as to point Pl up to a second modulation point at pressure P 2 and force F2.
  • the method according to the invention simulates a booster with a higher modulation point. The driver therefore increases the brake pressure with a familiar, comfortable pedal feel.
  • the pressure increase is advantageously carried out with a hydraulic pump, preferably with a pump that is already present in the braking system and is modified if necessary.
  • a hydraulic pump preferably with a pump that is already present in the braking system and is modified if necessary.
  • the pump control pattern determined before this pump actually builds up additional pressure. This makes it possible to further increase the wheel cylinder pressure with the same gradient as before the pump entered the phase of additional pressure support.
  • the volume characteristics can be stored, for example, in the software of the brake control system controller.
  • the build-up gradient of the pressure or the pressure specification for the wheel pressures is set so that in the phase of the additional pressure (from Pl to P2) it approximately corresponds to the build-up gradient of the pressure in the master brake cylinder, which in the phase of the sole booster support ( to Pl) was present. Changes in the gradient in the THZ are taken into account by appropriate adjustments to the control algorithm of the pump with regard to the build-up gradients of the wheel pressures to be generated.

Landscapes

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

Abstract

La présente invention concerne un procédé de régulation de l'établissement de la pression dans un système de freinage à réglage électronique destiné, de préférence, aux véhicules automobiles et comprenant un maître-cylindre, notamment un maître-cylindre tandem (THZ), un servo-frein à vide (dispositif amplificateur), au moins une autre source de pression d'un dispositif d'assistance de freinage, qui peut être commandée par une unité de commande et dont la pression peut être appliquée aux freins sur roue du véhicule automobile, et enfin un équipement de détection du souhait de décélération du conducteur. Ce procédé est caractérisé en ce que, avant la commande de l'autre source de pression en corrélation avec le fait connu que le conducteur souhaite décélérer ou avec les grandeurs dérivées, on détermine un modèle ou un programme de commande de cette autre source de pression et/ou d'au moins une soupape, ce modèle ou ce programme permettant l'établissement d'une pression qui correspond sensiblement au souhait de décélération du conducteur ou aux grandeurs dérivées et qui a une caractéristique déterminée donnée.
PCT/EP2002/000480 2001-01-24 2002-01-18 Procede et dispositif de regulation de l'etablissement de pression d'un systeme de freinage a reglage electronique WO2002058977A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10103057.6 2001-01-24
DE10103057 2001-01-24
DE10156401A DE10156401A1 (de) 2001-01-24 2001-11-16 Verfahren und Vorrichtung zur Regelung des Druckaufbaus in einer elektronisch regelbaren Bremsanlage
DE10156401.5 2001-11-16

Publications (1)

Publication Number Publication Date
WO2002058977A1 true WO2002058977A1 (fr) 2002-08-01

Family

ID=26008309

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/000480 WO2002058977A1 (fr) 2001-01-24 2002-01-18 Procede et dispositif de regulation de l'etablissement de pression d'un systeme de freinage a reglage electronique

Country Status (1)

Country Link
WO (1) WO2002058977A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005012057A1 (fr) * 2003-07-28 2005-02-10 Continental Teves Ag & Co. Ohg Systeme de freinage hydraulique de vehicule
EP2529987A1 (fr) * 2010-01-25 2012-12-05 Toyota Jidosha Kabushiki Kaisha Dispositif de commande de freinage et dispositif de freinage
CN110803172A (zh) * 2019-12-04 2020-02-18 苏州智加科技有限公司 自动驾驶车辆制动***的建模方法和车辆制动***

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0754607A2 (fr) * 1995-07-17 1997-01-22 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Installation de freinage de véhicules avec un amplificateur de la force de freinage
EP0800975A2 (fr) * 1996-04-08 1997-10-15 Denso Corporation Dispositif de controle de freinage pour un véhicule
WO1998000321A1 (fr) * 1996-07-01 1998-01-08 Itt Manufacturing Enterprises, Inc. Systeme de freinage hydraulique
EP0827887A2 (fr) * 1996-09-10 1998-03-11 Denso Corporation Système de freinage pour véhicule
EP0928730A1 (fr) * 1996-09-26 1999-07-14 Toyota Jidosha Kabushiki Kaisha Dispositif de freinage
DE19925783A1 (de) * 1999-06-05 2000-12-07 Bosch Gmbh Robert Verfahren und Vorrichtung zur Bremskraftverstärkung bei einem Fahrzeug

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0754607A2 (fr) * 1995-07-17 1997-01-22 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Installation de freinage de véhicules avec un amplificateur de la force de freinage
EP0800975A2 (fr) * 1996-04-08 1997-10-15 Denso Corporation Dispositif de controle de freinage pour un véhicule
WO1998000321A1 (fr) * 1996-07-01 1998-01-08 Itt Manufacturing Enterprises, Inc. Systeme de freinage hydraulique
EP0827887A2 (fr) * 1996-09-10 1998-03-11 Denso Corporation Système de freinage pour véhicule
EP0928730A1 (fr) * 1996-09-26 1999-07-14 Toyota Jidosha Kabushiki Kaisha Dispositif de freinage
DE19925783A1 (de) * 1999-06-05 2000-12-07 Bosch Gmbh Robert Verfahren und Vorrichtung zur Bremskraftverstärkung bei einem Fahrzeug

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005012057A1 (fr) * 2003-07-28 2005-02-10 Continental Teves Ag & Co. Ohg Systeme de freinage hydraulique de vehicule
EP2529987A1 (fr) * 2010-01-25 2012-12-05 Toyota Jidosha Kabushiki Kaisha Dispositif de commande de freinage et dispositif de freinage
EP2529987A4 (fr) * 2010-01-25 2013-11-20 Toyota Motor Co Ltd Dispositif de commande de freinage et dispositif de freinage
US8855882B2 (en) 2010-01-25 2014-10-07 Toyota Jidosha Kabushiki Kaisha Brake control device and braking device
CN110803172A (zh) * 2019-12-04 2020-02-18 苏州智加科技有限公司 自动驾驶车辆制动***的建模方法和车辆制动***

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