WO2001028831A1 - Braking system for automatically executing a braking operation - Google Patents
Braking system for automatically executing a braking operation Download PDFInfo
- Publication number
- WO2001028831A1 WO2001028831A1 PCT/EP2000/010070 EP0010070W WO0128831A1 WO 2001028831 A1 WO2001028831 A1 WO 2001028831A1 EP 0010070 W EP0010070 W EP 0010070W WO 0128831 A1 WO0128831 A1 WO 0128831A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vehicle
- stored
- braking
- brake system
- braking system
- Prior art date
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
Definitions
- the invention relates to a brake system for automatically performing a braking operation according to the preamble of / claim 1.
- Brake systems of this type which have been described, for example, in the documents DE 196 29 229 AI, DE 196 41 470 AI or DE 44 22 664 AI, can trigger an automatic braking process independently of certain driver reactions and / or certain events occurring outside the vehicle from the current brake pedal position generated by the driver.
- the brake pedal speed or the speed at which the driver's foot changes from the accelerator pedal to the brake pedal can be regarded as a driver reaction, which is considered to trigger the braking system, the braking process being triggered if the actuation speed exceeds a limit value.
- the automatic brake actuation remains active until a / termination criterion is reached, which is usually formulated in such a way that the driver has to reduce the pressure on the brake pedal or take back the brake pedal position so that the automatically generated brake pressure is released.
- the document DE 42 18 484 AI discloses an automatic braking system that takes into account the triggering criterion, the relative distance and the relative speed between the vehicle to be controlled and an obstacle. Under- If the relative distance exceeds a limit value and / or the differential speed exceeds a reference value, an automatic braking process is triggered to maintain a minimum distance from the obstacle or to maintain a maximum speed.
- the automatic triggering of a braking process is intended to increase vehicle safety. If the automatic brake system fails, the driver is informed of an error signal so that the driver can no longer trust the properties of the brake system that support the braking force and can initiate repair measures.
- the problem underlying the invention is to carry out an analysis of the failure of the automatic braking system using simple means in the event of a fault.
- a memory unit is assigned to the braking system, in which at least some of the data relevant for the automatic triggering of the braking process is stored.
- the behavior of the braking system and the occurrence of an error in the braking system can be reconstructed on the basis of the stored data.
- the storage of the data can also be used to verify the full functionality of the automatic braking system, so that any wrong decisions made by the driver, which, contrary to a recommendation of the automatic braking system, may occur, for example due to a sudden release of the brake pedal, can be checked.
- the stored data includes the variables vehicle position, vehicle speed describing the guidance of the vehicle, and possibly the vehicle float angle, which denotes the angle between the speed vector in the center of gravity and the longitudinal axis of the vehicle. These tracking variables represent a minimum data set required to generate an actuating signal for triggering an automatic braking process.
- both the actual variables representing the actual actual state of the vehicle and also target variables that are generated in the brake system and / or in another vehicle system that communicates with the brake system are stored.
- These actual and target values are normally included in the control, in which control signals for setting the brake system are generated from the control deviation between the actual and target values.
- these control signals are also stored in the memory unit, so that the actual state of the vehicle, the target state determined in the control systems and the measures taken by the control system and implemented via the control elements are available in the memory unit.
- the data stored in the storage unit can, for example, be used as the basis for a simulation in order to make it possible to subsequently understand the actual conditions with regard to the actual state of the vehicle, target values of the braking system, implementation in braking force and the driver's decision. In this way, it can be tracked, for example, whether there was an error in the brake system in the event of an accident or whether the driver was at fault as the cause of the accident.
- the data or part of the data is only stored for a limited period of time before the last standstill of the vehicle.
- the time period is specified, for example five minutes;
- the data to be supplied to the storage unit is continuously updated within this time period, data which is longer than the relevant time period being overwritten.
- the error signal which indicates a faulty state of the brake system, including the date and mileage when the error signal occurs, and expediently also the number of vehicle starts carried out after the error signal has occurred, are preferably stored in the permanent memory in order to ensure that the time of the occurrence of an error can be checked.
- various target and actual values which are relevant for the determination and generation of a brake pressure required in a specific situation are first temporarily stored in a memory unit of the brake system, only data which are within a specific previous time period being taken into account. Data representing events that occurred before the previous time period or that were determined before this time period are overwritten.
- Tracking sizes are stored in the temporary storage unit. stored, the target brake pressure, the actual brake pressure, the date and the mileage when updating, as well as any other target and actual values.
- the tracking variables include the vehicle position, the vehicle speed and the float angle of the vehicle, wherein for the latter only an actual variable, but not a target variable, is expediently stored.
- step 2 asks whether there is an error in the braking system.
- a fault in a control or calculation unit of the brake system as well as an error in the transmission or execution of an actuating signal generated in the control unit for exerting a brake pressure can be taken into account for the error query.
- the control or calculation unit both hardware errors and software errors are expediently examined.
- both target and actual values can be checked for plausibility.
- the error query is usually carried out by comparing the numerical value of the size under consideration with a reference value.
- step 3 in which defined state and operating variables or parameters of the braking system are permanently stored.
- an error signal is generated, which is expediently displayed to the driver so that the driver can take measures to repair the brake system.
- the permanently stored data is not updated and is retained for an indefinite period.
- the error signal including the date and mileage when the error signal first appeared, and advantageously also the number of vehicle starts that were carried out after the error signal occurred, are taken into account as data permanently stored in the memory unit.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001531640A JP2003512238A (en) | 1999-10-19 | 2000-10-13 | Brake device for automatically performing brake operation |
EP00972753A EP1140595A1 (en) | 1999-10-19 | 2000-10-13 | Braking system for automatically executing a braking operation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999150163 DE19950163C1 (en) | 1999-10-19 | 1999-10-19 | Brake system for the automatic execution of a braking process |
DE19950163.7 | 1999-10-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001028831A1 true WO2001028831A1 (en) | 2001-04-26 |
Family
ID=7926050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/010070 WO2001028831A1 (en) | 1999-10-19 | 2000-10-13 | Braking system for automatically executing a braking operation |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1140595A1 (en) |
JP (1) | JP2003512238A (en) |
DE (1) | DE19950163C1 (en) |
WO (1) | WO2001028831A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4485193B2 (en) * | 2001-07-11 | 2010-06-16 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method and apparatus for automatically operating vehicle deceleration |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59227546A (en) * | 1983-06-06 | 1984-12-20 | Sumitomo Electric Ind Ltd | Memory type automatic braking device for automobile |
DE4218484A1 (en) | 1991-06-05 | 1992-12-10 | Akebono Brake Ind | Automatic brake control with proximity sensor - provides programmed retardation and braking for fail=safe driving of motor vehicle in traffic |
DE4422664A1 (en) | 1993-07-03 | 1995-03-09 | Peter Luepges | Braking device |
DE19629229A1 (en) | 1996-07-20 | 1998-01-22 | Daimler Benz Ag | Procedure for performing an automatic braking process |
DE19641470A1 (en) | 1996-10-09 | 1998-04-16 | Dieter Wagels | Braking device e.g. for motor vehicle with ABS |
-
1999
- 1999-10-19 DE DE1999150163 patent/DE19950163C1/en not_active Expired - Fee Related
-
2000
- 2000-10-13 EP EP00972753A patent/EP1140595A1/en not_active Withdrawn
- 2000-10-13 JP JP2001531640A patent/JP2003512238A/en active Pending
- 2000-10-13 WO PCT/EP2000/010070 patent/WO2001028831A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59227546A (en) * | 1983-06-06 | 1984-12-20 | Sumitomo Electric Ind Ltd | Memory type automatic braking device for automobile |
DE4218484A1 (en) | 1991-06-05 | 1992-12-10 | Akebono Brake Ind | Automatic brake control with proximity sensor - provides programmed retardation and braking for fail=safe driving of motor vehicle in traffic |
DE4422664A1 (en) | 1993-07-03 | 1995-03-09 | Peter Luepges | Braking device |
DE19629229A1 (en) | 1996-07-20 | 1998-01-22 | Daimler Benz Ag | Procedure for performing an automatic braking process |
DE19641470A1 (en) | 1996-10-09 | 1998-04-16 | Dieter Wagels | Braking device e.g. for motor vehicle with ABS |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 009, no. 103 (M - 377) 8 May 1985 (1985-05-08) * |
Also Published As
Publication number | Publication date |
---|---|
JP2003512238A (en) | 2003-04-02 |
EP1140595A1 (en) | 2001-10-10 |
DE19950163C1 (en) | 2001-05-10 |
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