DE102007025648A1 - Braking system for motor vehicles - Google Patents
Braking system for motor vehicles Download PDFInfo
- Publication number
- DE102007025648A1 DE102007025648A1 DE102007025648A DE102007025648A DE102007025648A1 DE 102007025648 A1 DE102007025648 A1 DE 102007025648A1 DE 102007025648 A DE102007025648 A DE 102007025648A DE 102007025648 A DE102007025648 A DE 102007025648A DE 102007025648 A1 DE102007025648 A1 DE 102007025648A1
- Authority
- DE
- Germany
- Prior art keywords
- pressure
- brake
- hydraulic
- wheel brakes
- brake system
- 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.)
- Withdrawn
Links
- 239000012530 fluid Substances 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000001934 delay Effects 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- B60T8/40—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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
- B60T8/4081—Systems with stroke simulating devices for driver input
-
- 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
- B60T8/321—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 deceleration
- B60T8/3255—Systems in which the braking action is dependent on brake pedal data
- B60T8/3275—Systems with a braking assistant function, i.e. automatic full braking initiation in dependence of brake pedal velocity
-
- 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
- B60T8/36—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 including a pilot valve responding to an electromagnetic force
- B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
- B60T8/3655—Continuously controlled electromagnetic valves
-
- 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
- B60T8/40—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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/404—Control of the pump unit
- B60T8/405—Control of the pump unit involving the start-up phase
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Regulating Braking Force (AREA)
- Braking Systems And Boosters (AREA)
Abstract
Um bei einer elektrohydraulischen Bremsanlage vom Typ "Brake-by-wire" insbesondere bei Panikbremsungen einen Druckaufbau in den Radbremsen ohne Verzögerungen zu erreichen, wird vorgeschlagen, dass ein Mittel (21) vorgesehen ist, das bei einer schnellen Betätigung eines Bremspedals (1) ein Vorfüllen von Radbremsen (5, 6, 7, 8) mit hydraulischem Druckmittel bzw. einen begrenzten Druckaufbau in den Radbremsen (5, 6, 7, 8) ermöglicht.In order to achieve a pressure build-up in the wheel brakes without delays in an electro-hydraulic brake system of the type "brake-by-wire", especially during panic braking, it is proposed that a means (21) is provided, the at a quick operation of a brake pedal (1) Pre-filling of wheel brakes (5, 6, 7, 8) with hydraulic pressure medium or a limited pressure build-up in the wheel brakes (5, 6, 7, 8) allows.
Description
Die
Erfindung betrifft ein Bremssystem für Kraftfahrzeuge vom Typ „Brake-by-wire" mit:
einem
mittels eines Bremspedals betätigbaren
hydraulischen Bremsdruckgeber mit mindestens einem Druckraum, an
den über
mindestens ein Trennventil Radbremsen des Kraftfahrzeuges anschließbar sind, die
andererseits mit einer hydraulischen „Fremd"-Druckquelle verbindbar sind, mit Mitteln
zum Erfassen eines Fahrerverzögerungswunsches,
einem Pedalkraftsimulator, der mit dem Bremsdruckgeber zusammen
wirkt, durch den in der Betriebsart „Brake-by-wire" eine auf das Bremspedal
wirkende Rückstellkraft
simulierbar ist, und der durch eine hydraulische Zylinderanordnung
mit einem durch eine Simulatorfeder vorgespannten Simulatorkolben
gebildet ist, sowie mit einer Ventileinrichtung, die in der Betriebsart „Brake-by-wire" ein Beaufschlagen
des Simulatorkolbens mit dem in dem Bremsdruckgeber eingesteuerten
hydraulischen Druck ermöglicht,
wobei den Radbremsen hydraulische Druckaufbauventile bzw. Einlassventile
vorgeschaltet und hydraulische Druckabbauventile bzw. Auslassventile
nachgeschaltet sind, die ein Verbinden der Radbremsen mit einem
drucklosen Druckmittelvorratsbehälter
ermöglichen.The invention relates to a braking system for motor vehicles of the "brake-by-wire" type with:
an actuatable by means of a brake pedal hydraulic brake pressure generator with at least one pressure chamber to which at least one separating valve wheel brakes of the motor vehicle can be connected, on the other hand with a hydraulic "foreign" pressure source can be connected to means for detecting a driver deceleration request, a pedal force simulator, with the Brake pressure generator cooperates, by means of which in the operating mode "brake-by-wire" a force acting on the brake pedal restoring force is simulated, and which is formed by a hydraulic cylinder assembly with a biased by a simulator spring simulator piston, and with a valve device which in the mode "Brake-by-wire" allows the simulator piston to be acted upon by the hydraulic pressure applied in the brake pressure generator, the hydraulic brakes being preceded by hydraulic pressure build-up valves or intake valves and by hydraulic pressure reduction valves or exhaust valves being connected downstream tet, which allow a connection of the wheel brakes with a non-pressurized fluid reservoir.
Ein
derartiges Bremssystem ist aus der europäischen Patentschrift
Es ist daher Aufgabe der vorliegenden Erfindung, die Dynamik eines Bremssystems der eingangs genannten Gattung zu verbessern, so dass insbesondere bei Panikbremsungen ein Druckaufbau in den Radbremsen ohne Verzögerungen erfolgt.It is therefore an object of the present invention, the dynamics of a Braking system of the type mentioned, so that in particular during panic braking a pressure build-up in the wheel brakes without delays he follows.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, ein Mittel vorgesehen ist, das bei einer schnellen Betätigung des Bremspedals ein Vorfällen der Radbremsen mit hydraulischem Druckmittel bzw. einen begrenzten Druckaufbau in den Radbremsen ermöglicht.These Task is inventively characterized solved, a means is provided which, upon rapid actuation of the Brake Pedals an incident of Wheel brakes with hydraulic pressure medium or a limited pressure build-up allowed in the wheel brakes.
Zur Konkretisierung des Erfindungsgedankens sieht eine vorteilhafte Weiterbildung vor, dass das Mittel durch ein zum Bremsdruckgeber hin schließendes Rückschlagventil gebildet ist, das dem mindestens einen Trennventil parallel geschaltet ist.to Concretization of the inventive concept provides an advantageous Continuing that means through a to the brake pressure transducer closing check valve is formed, which is connected in parallel to the at least one isolation valve is.
Eine andere Ausgestaltung des Erfindungsgegenstandes sieht vor, dass die Auslassventile als elektromagnetisch betätigbare 2/2-Wege-Schaltventile ausgebildet sind und dass in einer Leitung, die die Auslassventile mit dem Druckmittelvorratsbehälter verbindet, ein analog regelbares 2/2-Wegeventil mit Druckbegrenzungsfunktion eingefügt ist. Durch diese Maßnahme wird unter Verwendung von kostengünstigen Mitteln ein geregelter Druckabbau realisiert.A Another embodiment of the subject invention provides that the exhaust valves as electromagnetically operated 2/2-way switching valves are formed and that in a pipe, which the exhaust valves connects to the pressure fluid reservoir, an analogue controllable 2/2-way valve with pressure limiting function added is. By this measure becomes more regulated using low cost means Pressure reduction realized.
Bei einer anderen vorteilhaften Ausführungsvariante der Erfindung werden in der Betriebsart „Brake-by-wire" entstehende Geräusche dadurch reduziert, dass die „Fremd"-Druckquelle durch ein Motor-Pumpen-Aggregat gebildet ist, an dessen Druckseite eine Dämpfungskammer vorgesehen ist. Dabei ist es besonders vorteilhaft, wenn der Dämpfungskammer eine Blende nachgeschaltet ist.at another advantageous embodiment The invention thus produces noises arising in the "brake-by-wire" operating mode reduces that "foreign" pressure source through a motor pump unit is formed, on whose pressure side a damping chamber is provided. It is particularly advantageous if the damping chamber downstream of a diaphragm is.
Zur besseren Regelung des von der „Fremd"-Druckquelle bereit gestellten Druckes ist bei einer anderen Ausgestaltung des Erfindungsgegenstandes ein zweites analog regelbares 2/2-Wegeventil mit Druckbegrenzungsfunktion vorgesehen, das einerseits an eine die Einlassventile mit dem Druckgeber sowie mit der „Fremd"-Druckquelle verbindende Leitung und andererseits an einen zwischen dem analog regelbaren 2/2-Wegeventil mit Druckbegrenzungsfunktion und dem Druckmittelvorratsbehälter liegenden Leitungsabschnitt angeschlossen ist.to better regulation of the "foreign" pressure source ready Asked pressure is in another embodiment of the subject invention a second analogue controllable 2/2-way valve with pressure limiting function provided on the one hand to a inlet valves with the pressure transducer as well as with the "foreign" pressure source connecting line and on the other hand to a between the analog controllable 2/2-way valve with pressure limiting function and the pressure fluid reservoir Line section is connected.
Eine kostengünstig herstellbare Ausführungsvariante sieht vor, dass der Druckgeber als ein einkreisiger Hauptbremszylinder ausgeführt ist, an dessen Druckraum die Radbremsen sowie der Pedalkraftsimulator angeschlossen sind.A economical producible variant provides that the pressure transducer as a single-circuit master cylinder accomplished is at the pressure chamber, the wheel brakes and the pedal force simulator are connected.
Eine andere vorteilhafte Weiterbildung der Erfindung sieht vor, dass der Druckgeber als ein einkreisiger Hauptbremszylinder ausgeführt ist, mit dessen Druckraum die Radbremsen verbindbar sind, während der Pedalkraftsimulator mit einem vom Druckraum getrennten weiteren Druckraum verbindbar ist.A Another advantageous embodiment of the invention provides that the pressure transducer is designed as a single-circuit master cylinder, with the pressure chamber, the wheel brakes are connected while the Pedal force simulator with a separate from the pressure chamber further Pressure chamber is connectable.
Eine redundante Erfassung des Fahrerverzögerungswunsches wird schließlich dadurch erreicht, dass die Mittel zum Erfassen des Verzögerungswunsches durch einen Pedaiwinkel-Sensor sowie einen Wegsensor gebildet sind, der den Weg einer beweglichen Wand eines dem Hauptbremszylinder vorgeschalteten Unterdruckbremskraftverstärkers sensiert.A redundant detection of the driver deceleration request is finally achieved in that the means for detecting the deceleration request by a Pedaiwinkel sensor and a displacement sensor are formed, the path of a movable wall of the Hauptbremszylin senses the upstream vacuum brake booster.
Schließlich sieht eine weitere Ausgestaltung des Erfindungsgegenstandes ein zu einer Fahrzeugachse hin schließendes Rückschlagventil vorgesehen ist, das einen Druckaufbau in den dieser Fahrzeugachse zugeordneten Radbremsen durch den hydraulischen Bremsdruckgeber verhindert.Finally sees a further embodiment of the subject invention a to a Vehicle axle closing check valve is provided, which is a pressure build-up in the vehicle axle associated wheel brakes through the hydraulic brake pressure transducer prevented.
Weitere
Merkmale und Vorteile der Erfindung werden in der nachfolgenden
Beschreibung an zwei Ausführungsbeispielen
unter Bezugnahme auf die beiliegenden Zeichnungen näher erläutert. In
den Zeichnungen zeigen
Das
in der Zeichnung dargestellte elektrohydraulische Bremssystem nach
der Erfindung besteht im Wesentlichen aus einem mittels eines Bremspedals
Der
mit einem lediglich schematisch angedeuteten Druckraum
Der
den Radbremsen
Der
Aufbau der in
Die
Funktionsweise von Bremssystemen vom Typ „Brake-by-wire" ist
im Wesentlichen dem Fachmann bekannt. Bei einem Druckaufbau in der Betriebsart „Brake-by-wire" wird das Bremspedal
Wird
das Bremspedal
Claims (10)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007025648A DE102007025648A1 (en) | 2006-08-11 | 2007-06-01 | Braking system for motor vehicles |
PCT/EP2007/058300 WO2008017713A1 (en) | 2006-08-11 | 2007-08-10 | Brake system for motor vehicles |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006037923 | 2006-08-11 | ||
DE102006037923.3 | 2006-08-11 | ||
DE102007025648A DE102007025648A1 (en) | 2006-08-11 | 2007-06-01 | Braking system for motor vehicles |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007025648A1 true DE102007025648A1 (en) | 2008-03-13 |
Family
ID=38537658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007025648A Withdrawn DE102007025648A1 (en) | 2006-08-11 | 2007-06-01 | Braking system for motor vehicles |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102007025648A1 (en) |
WO (1) | WO2008017713A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2128478A1 (en) * | 2008-05-28 | 2009-12-02 | Peugeot Citroen Automobiles SA | Braking system for controlling the stability and trajectory of an automobile and methods of using such a system |
EP2127979A1 (en) * | 2008-05-28 | 2009-12-02 | Peugeot Citroen Automobiles SA | Braking system for controlling the stability and trajectory of an automobile and methods of using such a system |
DE102022204332B3 (en) | 2022-05-02 | 2023-08-24 | Volkswagen Aktiengesellschaft | Braking system with bypass line and motor vehicle |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017221716A1 (en) * | 2017-12-01 | 2019-06-06 | Continental Teves Ag & Co. Ohg | Brake system for motor vehicles and method for operating a brake system |
DE102019201536A1 (en) * | 2019-02-07 | 2020-08-13 | Robert Bosch Gmbh | Electro-hydraulic external vehicle brake system |
DE102021211891A1 (en) * | 2021-10-21 | 2023-04-27 | Robert Bosch Gesellschaft mit beschränkter Haftung | Electrohydraulic dual-circuit external power brake system |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5609401A (en) * | 1995-02-21 | 1997-03-11 | General Motors Corporation | Proportional braking system with dual poppet valves |
DE19508329A1 (en) * | 1995-03-09 | 1996-09-12 | Teves Gmbh Alfred | Brake pressure control system |
DE19543582C2 (en) * | 1995-11-22 | 1999-10-14 | Daimler Chrysler Ag | Electro-hydraulic multi-circuit brake system for a road vehicle and tandem master cylinder |
JPH1035466A (en) * | 1996-07-23 | 1998-02-10 | Toyota Motor Corp | Brake fluid pressure controller |
JP3405137B2 (en) * | 1997-08-08 | 2003-05-12 | トヨタ自動車株式会社 | Braking force control device |
JP2000280881A (en) * | 1999-04-01 | 2000-10-10 | Toyota Motor Corp | Hydraulic brake system for vehicle |
US6837552B2 (en) * | 2002-04-12 | 2005-01-04 | Delphi Technologies, Inc. | Hybrid brake system for a vehicle |
DE10219787A1 (en) * | 2002-05-03 | 2003-11-13 | Bosch Gmbh Robert | Hydraulic brake facility for motor vehicles has a wheel brake, a main brake cylinder operated by a brake pedal and a source of pressure with an electric motor, a pump and a reservoir. |
WO2005012057A1 (en) * | 2003-07-28 | 2005-02-10 | Continental Teves Ag & Co. Ohg | Hydraulic braking system for vehicle |
JP2005170287A (en) * | 2003-12-12 | 2005-06-30 | Nissan Motor Co Ltd | Hydraulic brake device |
-
2007
- 2007-06-01 DE DE102007025648A patent/DE102007025648A1/en not_active Withdrawn
- 2007-08-10 WO PCT/EP2007/058300 patent/WO2008017713A1/en active Application Filing
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2128478A1 (en) * | 2008-05-28 | 2009-12-02 | Peugeot Citroen Automobiles SA | Braking system for controlling the stability and trajectory of an automobile and methods of using such a system |
EP2127979A1 (en) * | 2008-05-28 | 2009-12-02 | Peugeot Citroen Automobiles SA | Braking system for controlling the stability and trajectory of an automobile and methods of using such a system |
FR2931768A1 (en) * | 2008-05-28 | 2009-12-04 | Peugeot Citroen Automobiles Sa | BRAKING SYSTEM FOR CONTROLLING THE STABILITY AND TRACKING OF A MOTOR VEHICLE AND METHODS OF USING SUCH A SYSTEM |
FR2931767A1 (en) * | 2008-05-28 | 2009-12-04 | Peugeot Citroen Automobiles Sa | BRAKING SYSTEM FOR CONTROLLING THE STABILITY AND TRACKING OF A MOTOR VEHICLE AND METHODS OF USING SUCH A SYSTEM |
DE102022204332B3 (en) | 2022-05-02 | 2023-08-24 | Volkswagen Aktiengesellschaft | Braking system with bypass line and motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
WO2008017713A1 (en) | 2008-02-14 |
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R012 | Request for examination validly filed |
Effective date: 20140528 |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |