WO1997038881A1 - Bremsanlage mit elektronischer bremskraftverteilung - Google Patents

Bremsanlage mit elektronischer bremskraftverteilung Download PDF

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Publication number
WO1997038881A1
WO1997038881A1 PCT/EP1997/001768 EP9701768W WO9738881A1 WO 1997038881 A1 WO1997038881 A1 WO 1997038881A1 EP 9701768 W EP9701768 W EP 9701768W WO 9738881 A1 WO9738881 A1 WO 9738881A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
force distribution
electronic
braking
braking force
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/EP1997/001768
Other languages
German (de)
English (en)
French (fr)
Inventor
Thomas PRÖGER
Markus Zenzen
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.)
ITT Manufacturing Enterprises LLC
Original Assignee
ITT Manufacturing Enterprises LLC
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 LLC filed Critical ITT Manufacturing Enterprises LLC
Priority to JP53671697A priority Critical patent/JP4153041B2/ja
Priority to US09/066,355 priority patent/US6119062A/en
Priority to EP97918125A priority patent/EP0894059B1/de
Priority to DE59708197T priority patent/DE59708197D1/de
Publication of WO1997038881A1 publication Critical patent/WO1997038881A1/de
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
    • B60T8/1764—Regulation during travel on surface with different coefficients of friction, e.g. between left and right sides, mu-split or between front and rear
    • 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
    • B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
    • B60T8/1766—Proportioning of brake forces according to vehicle axle loads, e.g. front to rear of vehicle
    • 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
    • B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
    • B60T8/266—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves or actuators with external control means

Definitions

  • the present invention relates to a brake system with electronic brake force distribution according to the preamble of claim 1.
  • Such a brake system is known for example from DE 43 37 498 AI.
  • the known brake system regulates the braking force applied to the rear wheel in relation to the braking force applied to the front wheel in order to ensure an ideal distribution of braking force.
  • Pressure control valves are arranged in a hydraulic circuit that connects the master cylinder of the brake system with the rear wheel brakes.
  • An auxiliary power source is provided for delivering a power pressure and a hydraulic booster for regulating the brake pressure and for actuating the master cylinder.
  • a switchover valve is arranged between the master cylinder and the control valves and can optionally be brought into a first operating position for connecting the control valves to the master cylinder and for blocking the connection between the control valves and the hydraulic amplifier and into a second operating position for connecting the Control valves with the hydraulic amplifier and to block the connection between the control valves and the master cylinder.
  • the control valves regulate the hydraulic pressure in the rear wheel cylinders in accordance with the predetermined relationship to the front wheel brake pressure. Entry into this regulation depends on whether a certain starting condition is fulfilled or not.
  • the brake light switch must be switched on, the vehicle speed must exceed a certain threshold value and the vehicle acceleration must have fallen below a certain negative threshold value, and finally the wheel speed of the rear wheel, its braking pressure to be regulated, the wheel speed of the front wheel in front of it is below a certain amount. If these conditions are met, the electronic brake force distribution starts. It is canceled if either the brake light switch is switched off, which means that the driver has taken his foot off the brake pedal, or if the vehicle acceleration exceeds a negative threshold value of 0.25 g.
  • the present invention is based on the object of creating a brake system of the type mentioned at the outset which has an exit from the electronic brake force distribution independently of the actuation of the brake pedal and regardless of whether a certain vehicle acceleration is exceeded, if a pressure reduction on the rear axle brakes is not required.
  • the principle of the invention is that the brake system interrupts the electronic braking force distribution even if after a detected maximum deceleration, that is to say minimum vehicle acceleration, vehicle acceleration has increased significantly. So it is not a fixed threshold value of the vehicle acceleration that is selected, but one of the sequence dependent on the braking process. Such a so-called “fast exit” makes it possible to leave the electronic braking force distribution as quickly as possible when electronic control is no longer necessary. This ensures an increase in brake pressure when the brake pedal is depressed or when the brake pedal is depressed. This avoids unnecessary valve operations. Such an exit works both when the brake light switch is intact and when it is defective, without the driver's feeling on the brake pedal deteriorating.
  • the exit criterion according to the invention is particularly recommended for vehicle speeds that exceed the walking speed. At low speeds, the vehicle speed and thus the acceleration calculated therefrom is relatively prone to errors.
  • the exit threshold from the electronic brake force distribution is approximately half to four fifths of the maximum deceleration, that is to say the minimum acceleration during the braking process, it is ensured that in the partial braking area there is a risk of the vehicle being under-braked by closed intake valves on the rear axle is avoided.
  • the inlet valves on the rear axle are closed, higher pedal forces are required in order to achieve the desired vehicle deceleration only through the braking force of the front wheels.
  • Such braking processes lead to increased lining wear on the wheel brakes of the front axle.
  • a brake system enters the electronic brake force distribution regardless of the signal from the brake light switch. This can happen regularly due to a certain vehicle deceleration, at which at least one rear wheel moves too slowly in comparison to the vehicle reference speed or to the speed of the front wheel in front of it.
  • the brake system thus enters the electronic brake force distribution and lowers the brake pressure on the rear wheel concerned, for example by opening an exhaust valve. After the wheel speed of the affected rear wheel has stabilized, a pressure-maintaining phase and then a pressure build-up phase follow. Be it that the brake light switch of the vehicle was damaged before braking or during braking.
  • the invention prevents this by the fact that during the electronic control of the braking force distribution the vehicle deceleration, that is the negative vehicle acceleration, is caught. The extreme value is saved. If the vehicle deceleration has then dropped to about 2/3 of the maximum deceleration and there is no pressure reduction phase at this time, the electronic braking force distribution is interrupted. The background to this is that in this way it is recognized at an early stage that the driver has released the brake and thus a quick exit from the electronic brake force distribution can take place. However, such an exit is only recommended at vehicle speeds that exceed 5 km / h. If possible, such a criterion should not be used at lower speeds, because when stopping, for example, at a traffic light, when the brake pedal is pressed further, the brake suddenly fails because all inlet valves are suddenly opened.
  • a minimum deceleration of a threshold of 0.4 g or, in other words, a maximum vehicle acceleration of -0.4 g is recommended in order to apply the exit criterion according to the invention.
  • the vehicle acceleration is certainly subject to a spread of 0.1 g at low values. If the maximum acceleration for the application of the exit criterion according to the invention were, for example, -0.3 g, then it would be possible for this scatter to exit at -0.2 g if the actual minimum acceleration is only Was -0.3g. However, this means that the vehicle was never decelerated sharply during braking, and that strong braking could still follow, in which the electronic braking force distribution remains necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)
PCT/EP1997/001768 1996-04-16 1997-04-10 Bremsanlage mit elektronischer bremskraftverteilung Ceased WO1997038881A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP53671697A JP4153041B2 (ja) 1996-04-16 1997-04-10 電子的にブレーキ力分配を行うブレーキ装置
US09/066,355 US6119062A (en) 1996-04-16 1997-04-10 Braking system with electronic braking force distribution
EP97918125A EP0894059B1 (de) 1996-04-16 1997-04-10 Bremsanlage mit elektronischer bremskraftverteilung
DE59708197T DE59708197D1 (de) 1996-04-16 1997-04-10 Bremsanlage mit elektronischer bremskraftverteilung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19614908.8 1996-04-16
DE19614908A DE19614908A1 (de) 1996-04-16 1996-04-16 Bremsanlage mit elektronischer Bremskraftverteilung

Publications (1)

Publication Number Publication Date
WO1997038881A1 true WO1997038881A1 (de) 1997-10-23

Family

ID=7791369

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/001768 Ceased WO1997038881A1 (de) 1996-04-16 1997-04-10 Bremsanlage mit elektronischer bremskraftverteilung

Country Status (5)

Country Link
US (1) US6119062A (https=)
EP (1) EP0894059B1 (https=)
JP (1) JP4153041B2 (https=)
DE (2) DE19614908A1 (https=)
WO (1) WO1997038881A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7049324B1 (en) 1999-11-15 2006-05-23 Ashis Kumar Saha Triazoles as farnesyl transferase inhibitors

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4422328B2 (ja) * 1997-11-06 2010-02-24 コンチネンタル・テベス・アーゲー・ウント・コンパニー・オーハーゲー 電子的ブレーキ力分配装置を有する車両のブレーキシステムのための後輪ブレーキにおけるブレーキ圧力変化の制御方法
EP1065092A3 (en) * 1999-07-01 2005-03-30 Hitachi, Ltd. Apparatus for controlling braking and propulsion in a vehicle
JP4868241B2 (ja) * 2007-07-17 2012-02-01 株式会社アドヴィックス 制動制御装置
KR102397175B1 (ko) * 2017-11-21 2022-05-13 현대자동차주식회사 캘리퍼 고장 시 abs를 이용한 제동 보상 방법
KR20230020031A (ko) * 2021-08-02 2023-02-10 현대자동차주식회사 차량의 주행 상태 판단 방법
KR20230037722A (ko) * 2021-09-09 2023-03-17 현대자동차주식회사 차량의 주행 상태 판단 방법

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3133442A1 (de) * 1981-08-24 1983-03-10 Fritz 8901 Kissing Neubert "bremsanlage und verfahren zum betreiben einer bremsanlage"
GB2135413A (en) * 1983-02-25 1984-08-30 Teves Gmbh Alfred Improvements in brake force distribution
EP0546948A1 (fr) * 1991-12-13 1993-06-16 Regie Nationale Des Usines Renault S.A. Procédé de contrôle de la décélération d'un véhicule
DE4414980A1 (de) * 1994-04-29 1995-11-02 Teves Gmbh Alfred Schaltungsanordnung für eine Bremsanlage mit EBV

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4224971A1 (de) * 1992-07-29 1994-02-03 Teves Gmbh Alfred Verfahren zur Erhöhung der Funktionssicherheit einer Bremsanlage mit elektronischer Regelung der Bremskraftverteilung
US5547264A (en) * 1992-11-04 1996-08-20 Aisin Seiki Kabushiki Kaisha Braking force distribution control system
DE4309243C2 (de) * 1993-03-23 2003-07-03 Continental Teves Ag & Co Ohg Bremsanlage mit elektronischer Steuerung der Bremskraftverteilung
US5927830A (en) * 1995-11-30 1999-07-27 Aisin Seiki Kabushiki Kaisha Vehicle motion control system for immediately terminating braking control when the vehicle enters onto a stepped or rough road

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3133442A1 (de) * 1981-08-24 1983-03-10 Fritz 8901 Kissing Neubert "bremsanlage und verfahren zum betreiben einer bremsanlage"
GB2135413A (en) * 1983-02-25 1984-08-30 Teves Gmbh Alfred Improvements in brake force distribution
EP0546948A1 (fr) * 1991-12-13 1993-06-16 Regie Nationale Des Usines Renault S.A. Procédé de contrôle de la décélération d'un véhicule
DE4414980A1 (de) * 1994-04-29 1995-11-02 Teves Gmbh Alfred Schaltungsanordnung für eine Bremsanlage mit EBV

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7049324B1 (en) 1999-11-15 2006-05-23 Ashis Kumar Saha Triazoles as farnesyl transferase inhibitors

Also Published As

Publication number Publication date
JP4153041B2 (ja) 2008-09-17
EP0894059B1 (de) 2002-09-11
US6119062A (en) 2000-09-12
DE59708197D1 (de) 2002-10-17
EP0894059A1 (de) 1999-02-03
JP2000508273A (ja) 2000-07-04
DE19614908A1 (de) 1997-10-23

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