WO1999007587A1 - Verfahren zur steuerung einer fahrzeugbremsanlage bei einem unfall - Google Patents
Verfahren zur steuerung einer fahrzeugbremsanlage bei einem unfall Download PDFInfo
- Publication number
- WO1999007587A1 WO1999007587A1 PCT/DE1998/001341 DE9801341W WO9907587A1 WO 1999007587 A1 WO1999007587 A1 WO 1999007587A1 DE 9801341 W DE9801341 W DE 9801341W WO 9907587 A1 WO9907587 A1 WO 9907587A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- brake
- accident
- cylinder
- valve
- brake cylinder
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
- G05G1/30—Controlling members actuated by foot
- G05G1/32—Controlling members actuated by foot with means to prevent injury
-
- 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
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/06—Disposition of pedal
- B60T7/065—Disposition of pedal with means to prevent injuries in case of collision
-
- 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
- B60T8/48—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 connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
- B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
- B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
- B60T8/4863—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
- B60T8/4872—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems
- B60T8/4881—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems having priming means
Definitions
- the invention relates to a method for controlling a vehicle brake system in an accident according to the preamble of the main claim.
- the starting point for the invention is that a foot brake pedal of a motor vehicle cannot be depressed or can only be depressed to the floor panel with extremely high foot power, ie. H. the foot brake pedal protrudes into a driver's footwell.
- the foot brake pedal protruding into the footwell poses a great risk of injury in particular because in many accidents the vehicle brake system is actuated and a brake foot is placed on the foot brake pedal.
- a lower depression of the foot brake pedal for a given actuating force is achieved by increasing the brake force boost in the event of an accident.
- the brake force boost which can normally also be 1: 1, d. H. Normal braking takes place without brake booster, for example using a vacuum brake booster or hydraulically using a pump. In the first case, the force that is exerted on the piston of the main brake cylinder by means of the foot brake pedal is increased more by the vacuum brake booster in an accident than in normal braking.
- the force on the piston is increased by increasing the brake force amplification and this is pushed further into the master brake cylinder, as a result of which the foot brake pedal yields with the same operating force, i.e. moves in the direction of the floor panel.
- the pump delivers brake fluid from the master brake cylinder in the direction of the wheel brake cylinder, so that the foot brake pedal also yields.
- the braking force is increased, i.e. H. the vehicle brake system remains fully functional.
- an accident sensor is provided, as is known, for example, for triggering airbag or belt tensioner systems.
- the method according to claim 1 is not limited to hydraulic vehicle brake systems, it can also be used, for example, for pneumatic or electromechanical vehicle brake systems.
- a quantity of brake fluid from the master brake cylinder in an accident reaches a fluid reservoir.
- the amount of brake fluid can flow directly from the master brake cylinder into the fluid accumulator; brake fluid can also flow indirectly from the master brake cylinder, for example via wheel brake cylinders, into the fluid accumulator. In both cases, a desired yielding of the foot brake pedal is achieved by an amount of brake fluid from the Master brake cylinder is removed.
- the fluid accumulator can be a fluid accumulator which is present in any case in the case of a slip-controlled vehicle brake system and can be connected to the wheel brake cylinders via an outlet valve. It is also possible to inject brake fluid from the master brake cylinder with the interposition of a valve that is opened in the event of an accident
- the method according to claim 2 can be carried out independently or together with the method according to claim 1 (claim 3).
- a joint implementation of both methods has the advantage that the
- the method according to the invention has the advantage that it can be applied to the vehicle brake system with any minor modifications to an existing vehicle brake system.
- the effort for implementing the method according to the invention on existing vehicle brake systems is therefore minimal.
- the method according to the invention is intended for use on a slip-controlled vehicle brake system, but it can also be used on conventional vehicle brake systems without slip control.
- Another advantage of the invention is that an actuating force with which the foot brake pedal is depressed does not have to be increased in order to achieve compliance of the foot brake pedal in an accident, such as would be required, for example, to shear off a shear pin.
- FIG. 1 shows a block diagram of a hydraulic vehicle brake system according to the invention
- FIG. 2 shows a control unit for controlling and regulating the vehicle brake system shown in FIG. 1. Description of the embodiment
- the hydraulic dual-circuit vehicle brake system shown in FIG. 1 has a master brake cylinder 10, to which two wheel brake cylinders 14 per brake circuit I, II are connected via a slip control device 12.
- a vacuum brake booster 16 is flanged to the master brake cylinder 10, and the vehicle brake system is actuated by means of a foot brake pedal 18.
- the vacuum brake booster 16 preferably has a controllable one
- the brake booster can be controlled, for example, by means of a solenoid valve with which a negative pressure in the
- Brake booster 16 can be raised to ambient pressure regardless of its actuation, which means maximum brake booster.
- the solenoid valve is preferably designed as a continuous valve around the
- Such a controllable brake booster is known from ATZ Automobiltechnische Zeitschrift 97 (1995) 1, pages 36 f.
- the vehicle brake system shown in Figure 1 is based on the
- Brake circuit II is constructed in the same way and works in the same way.
- a branching main brake line 20, 22 leads from the master brake cylinder 10 to the two wheel brake cylinders 14 of the brake circuit I.
- a 2/2-way solenoid valve which is open in its basic position is switched on as a changeover valve 24.
- a check valve 28 through which flow can flow in the direction of the wheel brake cylinders 14 is connected in parallel with the changeover valve 24.
- an inlet valve 30 is arranged in each case.
- the inlet valves 30 are open 2/2-way solenoid valves.
- the wheel brake cylinders 14 are connected to the master brake cylinder 10.
- the inlet valves 30 are connected in parallel in the direction of the main brake cylinder 10 through-flow check valves 32.
- An outlet valve 34 is connected to each wheel brake cylinder 14, from which a common return line 36 leads to a suction side of a pump 38, hereinafter referred to as a return pump.
- the return pumps 38 of both brake circuits I, II can be driven by a common electric pump motor 39.
- the outlet valves 34 are closed 2/2-way solenoid valves in their basic position.
- a fluid reservoir 40 is connected to the return line 36.
- a check valve 42 through which flow can flow in the direction of the return pump 38 is arranged in the return line 36.
- a pressure side of the return pump 38 is connected to the common part 20 of the main brake line with the interposition of a fluid damper 44.
- the suction side of the return pump 38 can be connected to the master brake cylinder 10 via an intake valve 48 arranged in an intake line 46.
- the suction valve 48 is a closed 2/2-way solenoid valve in its basic position.
- the solenoid valves 24, 30, 34, 48 of the vehicle brake system are designed as seat valves, preferably with a valve ball as a closing body.
- intake valves 30 are acted upon by pressure from the master brake cylinder in the opening direction, the intake valve 48 is pressurized in its closed basic position by pressure from the master brake cylinder 10 in the closing direction, and the exhaust valves 34 are pressurized in the closed basic position by pressure from the wheel brake cylinders 14 in the closing direction acted upon.
- the vehicle brake system has the electronic control unit 50 symbolically represented in FIG. 2. This controls the intake valves 48, changeover valves 24, return pumps 38, intake valves 30 and exhaust valves 34. It receives signals from wheel rotation sensors 52 and from an accident sensor 54 which gives a signal when the vehicle collides with an obstacle or another vehicle. In vehicles with airbag or belt tensioner systems, an accident sensor 54 is present, the signal of which can be used.
- the vehicle brake system shown in FIG. 1 functions as follows: Conventional braking is carried out by actuating the main brake cylinder 10 by depressing the foot brake pedal 18, which brings about brake pressure in the wheel brake cylinders 14. The solenoid valves 24, 30, 34, 48 remain in their basic positions shown, the return pump 38 remains switched off.
- the electronic control unit 50 switches on the return pumps 38 and there is brake pressure modulation in the wheel brake cylinder 14 of the vehicle wheel concerned by means of the vehicle wheel assigned to it
- Intake valve 30 and exhaust valve 34 in a manner known per se. Brake fluid escaping from the wheel brake cylinder 14 can be temporarily stored in the fluid reservoir 40.
- the changeover valve 24 can be closed in order to separate the pressure side of the return pump 38 from the master brake cylinder 10.
- the suction valve 48 can be opened.
- a traction control or driving dynamics control is also carried out in a corresponding manner by brake pressure modulation by means of the inlet and outlet valves 30, 34 with the return pump 38 switched on, the changeover valve 24 being closed and the suction valve 48 being opened, so that the return pump 38, which is self-priming, is brake fluid sucks from the master cylinder 10.
- the brake force boost of the vehicle brake system is suddenly increased to its maximum value. This can be done by controlling the vacuum brake booster 16 so that its vacuum is raised to ambient pressure. This type of increase in the brake booster can also be realized on a conventional brake system without slip control. The only requirement for this is a brake booster 16 whose brake booster can be controlled independently of the actuation of the foot brake pedal 18.
- a second, hydraulic possibility of increasing the brake force boost is to close the changeover and exhaust valves 24, 34, the intake valve 48 and open the inlet valves 30 and turn on the return pump 38. In both cases, the increase in the brake booster causes that
- Foot brake pedal 18 is depressed further with a certain actuation force than without increasing the brake force boost. It is thereby achieved that the foot brake pedal 18 moves closer to a floor panel of the vehicle when a driver operates the vehicle brake system in an accident.
- the increase in the brake force amplification can be designed so that with an operating force of the foot brake pedal 18, that with normal
- Brake booster corresponds to a sharp braking or full braking
- the foot brake pedal 18 reaches the floor pan. This giving in of the foot brake pedal 18 to or almost to the bottom plate reduces the risk of foot injury.
- the vehicle brake system remains fully functional, the
- Brake booster is increased.
- Another way of making the foot brake pedal 18 more compliant in the event of an accident is to open at least one of the exhaust valves 34 so that
- Wheel brake cylinder 14 can flow into the fluid reservoir 40.
- the other valves 24, 30, 48 remain in their basic positions, the return pump 38 does not need to be switched on with this measure.
- Brake fluid in the fluid reservoir 40 causes the same amount to flow out
- the accident sensor 52 is present in a vehicle equipped with an airbag or belt tensioner, and its signal can be used to control the vehicle brake system according to the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Regulating Braking Force (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11511494A JP2001502275A (ja) | 1997-08-08 | 1998-05-14 | 事故における車両ブレーキ装置の制御法 |
EP98933530A EP0929426A1 (de) | 1997-08-08 | 1998-05-14 | Verfahren zur steuerung einer fahrzeugbremsanlage bei einem unfall |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997134310 DE19734310A1 (de) | 1997-08-08 | 1997-08-08 | Verfahren zur Steuerung einer Fahrzeugbremsanlage bei einem Unfall |
DE19734310.4 | 1997-08-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999007587A1 true WO1999007587A1 (de) | 1999-02-18 |
Family
ID=7838340
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/001341 WO1999007587A1 (de) | 1997-08-08 | 1998-05-14 | Verfahren zur steuerung einer fahrzeugbremsanlage bei einem unfall |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0929426A1 (de) |
JP (1) | JP2001502275A (de) |
DE (1) | DE19734310A1 (de) |
WO (1) | WO1999007587A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002046009A1 (en) * | 2000-12-08 | 2002-06-13 | Delphi Technologies Inc. | Brake pressure limiting |
FR2829982A1 (fr) * | 2001-09-26 | 2003-03-28 | Bosch Gmbh Robert | Dispositif de freinage a securite accrue et systeme de freinage comportant un tel dispositif |
WO2007104629A1 (de) * | 2006-03-15 | 2007-09-20 | Robert Bosch Gmbh | Bremsanlage für ein fahrzeug |
WO2011020637A1 (de) * | 2009-08-21 | 2011-02-24 | Robert Bosch Gmbh | Verfahren zur betätigung einer hydraulischen fahrzeugbremsanlage |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4670349B2 (ja) * | 2004-03-10 | 2011-04-13 | 株式会社アドヴィックス | 車両用制動装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19517604A1 (de) * | 1994-05-25 | 1995-11-30 | Volkswagen Ag | Bremsanlage für ein Fahrzeug |
DE19624548A1 (de) * | 1995-06-28 | 1997-01-02 | Volkswagen Ag | Bremsanlage für ein Kraftfahrzeug |
DE19634257A1 (de) | 1995-08-30 | 1997-03-06 | Volkswagen Ag | Bremsanlage für ein Fahrzeug |
DE19601110A1 (de) * | 1996-01-13 | 1997-07-17 | Teves Gmbh Alfred | Hydraulische Kraftfahrzeugbremsanlage |
DE19723033A1 (de) * | 1996-06-11 | 1997-12-18 | Volkswagen Ag | Bremssystem für ein Kraftfahrzeug |
-
1997
- 1997-08-08 DE DE1997134310 patent/DE19734310A1/de not_active Withdrawn
-
1998
- 1998-05-14 EP EP98933530A patent/EP0929426A1/de not_active Withdrawn
- 1998-05-14 JP JP11511494A patent/JP2001502275A/ja active Pending
- 1998-05-14 WO PCT/DE1998/001341 patent/WO1999007587A1/de not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19517604A1 (de) * | 1994-05-25 | 1995-11-30 | Volkswagen Ag | Bremsanlage für ein Fahrzeug |
DE19624548A1 (de) * | 1995-06-28 | 1997-01-02 | Volkswagen Ag | Bremsanlage für ein Kraftfahrzeug |
DE19634257A1 (de) | 1995-08-30 | 1997-03-06 | Volkswagen Ag | Bremsanlage für ein Fahrzeug |
DE19601110A1 (de) * | 1996-01-13 | 1997-07-17 | Teves Gmbh Alfred | Hydraulische Kraftfahrzeugbremsanlage |
DE19723033A1 (de) * | 1996-06-11 | 1997-12-18 | Volkswagen Ag | Bremssystem für ein Kraftfahrzeug |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002046009A1 (en) * | 2000-12-08 | 2002-06-13 | Delphi Technologies Inc. | Brake pressure limiting |
FR2829982A1 (fr) * | 2001-09-26 | 2003-03-28 | Bosch Gmbh Robert | Dispositif de freinage a securite accrue et systeme de freinage comportant un tel dispositif |
WO2003026942A1 (fr) * | 2001-09-26 | 2003-04-03 | Robert Bosch Gmbh | Dispositif de freinage a securite accrue et systeme de freinage comportant un tel dispositif |
US6893102B2 (en) * | 2001-09-26 | 2005-05-17 | Robert Bosch Gmbh | Safety braking device and a braking system comprising such device |
WO2007104629A1 (de) * | 2006-03-15 | 2007-09-20 | Robert Bosch Gmbh | Bremsanlage für ein fahrzeug |
WO2011020637A1 (de) * | 2009-08-21 | 2011-02-24 | Robert Bosch Gmbh | Verfahren zur betätigung einer hydraulischen fahrzeugbremsanlage |
US8870300B2 (en) | 2009-08-21 | 2014-10-28 | Robert Bosch Gmbh | Method for actuating a hydraulic vehicle brake system |
Also Published As
Publication number | Publication date |
---|---|
JP2001502275A (ja) | 2001-02-20 |
DE19734310A1 (de) | 1999-02-11 |
EP0929426A1 (de) | 1999-07-21 |
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