DE19524952B4 - Hydraulic brake system with electrically switchable hydraulic valves - Google Patents
Hydraulic brake system with electrically switchable hydraulic valves Download PDFInfo
- Publication number
- DE19524952B4 DE19524952B4 DE1995124952 DE19524952A DE19524952B4 DE 19524952 B4 DE19524952 B4 DE 19524952B4 DE 1995124952 DE1995124952 DE 1995124952 DE 19524952 A DE19524952 A DE 19524952A DE 19524952 B4 DE19524952 B4 DE 19524952B4
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- DE
- Germany
- Prior art keywords
- hydraulic
- valve
- switching
- brake system
- valves
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 8
- 230000003111 delayed effect Effects 0.000 claims description 3
- 230000001934 delay Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000011144 upstream manufacturing 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
- B60T8/36—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
-
- 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
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
-
- 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
- B60T8/363—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems
-
- 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
- B60T8/42—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 having expanding chambers for controlling pressure, i.e. closed systems
- B60T8/4275—Pump-back systems
-
- 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
- B60T8/50—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 having means for controlling the rate at which pressure is reapplied to or released from the brake
- B60T8/5006—Pressure reapplication by pulsing of 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
- B60T8/50—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 having means for controlling the rate at which pressure is reapplied to or released from the brake
- B60T8/5075—Pressure release by pulsing of valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Hydraulische Bremsanlage mit elektrisch umschaltbaren Hydraulikventilen, die zur Modulation des Bremsdruckes in den Radbremsen zwecks Blockierschutzregelung, Antriebsschlupfregelung oder dergl. vorgesehen sind, dadurch gekennzeichnet, daß zur Umschaltung der Hydraulikventile (5, 6) von der einen in die andere Endstellung für die Dauer der Umschaltung (t1–t2; t4–t5) ein Wechselsignal angelegt wird, das den Umschaltvorgang im Vergleich zu einem "Ein- bzw. Ausschalten" des Hydraulikventils (5, 6) verzögert, und daß nach dem Umschalten oder nach einer vorgegebenen Umschaltzeitdauer ein Dauersignal an dem Hydraulikventil anliegt.Hydraulic brake system with electrically switchable hydraulic valves, which are provided for modulating the brake pressure in the wheel brakes for the purpose of anti-lock control, traction control or the like, characterized in that for switching the hydraulic valves (5, 6) from one to the other end position for the duration of the switchover (t 1 -t 2 ; t 4 -t 5 ) an alternating signal is applied, which delays the switching process compared to "switching on or off" of the hydraulic valve (5, 6), and after switching or after a predetermined Changeover period, a continuous signal is present at the hydraulic valve.
Description
Hydraulische Bremsanlage mit elektrisch umschaltbaren Hydraulikventilen Die Erfindung bezieht sich auf eine hydraulische Bremsanlage mit elektrisch umschaltbaren Hydraulikventilen, die zur Modulation des Bremsdruckes in den Radbremsen zwecks Blockierschutzregelung, Antriebsschlupfregelung oder dergl. vorgesehen sind.Hydraulic brake system with electrically switchable Hydraulic valves The invention relates to a hydraulic Brake system with electrically switchable hydraulic valves that for modulating the brake pressure in the wheel brakes for the purpose of anti-lock control, Traction control or the like. Are provided.
Derartige Bremsanlagen sind in vielfältiger Ausgestaltung bekannt. Zur Bremsdruckmodulation werden z.B. elektromagnetisch betätigbare 2/2-Wegeventile, d.h. Hydraulikventile, die nur zwei Schaltpositionen (offen oder geschlossen) kennen, verwendet. Wird mit solchen Ventilen eine Blockierschutz- oder eine Antriebsschlupfregelung durchgeführt, läßt sich der Druckaufbau- und der Druckabbaugradient durch Ansteuerung der Hydraulikventile mit niederfrequenten Pulsfolgen und Variieren der Pulsdauer-/Pulspausenverhältnisse in der gewünschten Weise beeinflussen.Such brake systems are of various designs known. For brake pressure modulation e.g. electromagnetic actuated 2/2-way valves, i.e. Hydraulic valves that only have two switching positions know (open or closed), used. Will with such valves an anti-lock or a traction control performed, the pressure build-up and the pressure reduction gradient by controlling the hydraulic valves with low-frequency pulse trains and varying the pulse duration / pause ratio in the desired one Influence wise.
Im allgemeinen ist für jedes regelbare Rad ein Ventilpaar, nämlich ein Einlaß- und ein Auslaßventil vorgesehen, wobei das Einlaßventil, das in der Bremsleitung zwischen dem Hauptzylinder und der Radbremse eingefügt ist, zweckmäßigerweise in seiner Ruhestellung auf Durchlaß geschaltet ist und beim Anlegen einer Spannung in den Sperrzustand übergeht. Das Auslaßventil, das zum Druckabbau dient, ist dagegen in der Ruhe stellung gesperrt.Generally is for everyone adjustable wheel a pair of valves, namely an inlet and an exhaust valve provided, the inlet valve, that in the brake line between the master cylinder and the wheel brake added is, expediently is switched to passage in its rest position and when putting on a voltage passes into the blocking state. The exhaust valve, that serves to reduce pressure, however, is locked in the rest position.
Ein Nachteil der Bremsdruckregelung mit Hilfe solcher schnellschaltenden Hydraulikventile besteht darin, daß durch die schnellen Ankerbewegungen beim Übergang von der einen in die andere Endposition, durch örtliche Verzögerung und Beschleunigung der hydraulischen Flüssigkeit, Übertragung der Pulsation auf Bauteile (Körperschall) usw. Geräusche entstehen, die bei einer Blockierschutz- oder Antriebsschlupfregelung als störend empfunden werden. Die Geräuschstärke wird maßgeblich von der Umschaltgeschwindigkeit von der einen in die andere Endposition bestimmt.A disadvantage of brake pressure control with the help of such fast-switching hydraulic valves is that by the fast anchor movements during the transition from one to the other other end position, by local delay and acceleration of the hydraulic fluid, transmission of the pulsation Components (structure-borne noise) etc. noises arise with an anti-lock or traction control system as annoying be felt. The noise level will essential of the changeover speed from one end position to the other certainly.
Aus der
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die störenden Geräusche, die durch das schnelle Umschalten der Ventilstößel dieser Hydraulikventile von der einen in die andere Endposition hervorgerufen werden, auf einfache Weise und ohne nachteiligen Einfluß auf die Bremsdruckregelung zu mindern oder entscheidend zu verringern.The present invention lies based on the task, the disruptive Sounds, by quickly switching the valve lifters of these hydraulic valves from one end position to the other simple way and without adverse influence on the brake pressure control reduce or significantly reduce.
Es hat sich gezeigt, daß diese Aufgabe durch die im Anspruch 1 beschriebenen Maßnahmen zu lösen ist. Das Besondere der erfindungsgemäßen Bremsanlage besteht also darin, daß die Umschaltung der Hydraulikventile bzw. des Ventilstößels von der einen in die andere Endstellung durch ein Wechselsignal bewirkt wird, das nur für die Dauer der Umschaltung anliegt und das den Umschaltvorgang im Vergleich zu einem reinen "Ein- bzw. Ausschalten" des Ventils verzögert; nach dem Umschalten oder nach einer vorgegebenen Umschaltzeitdauer liegt dann an dem Hydraulikventil wieder ein Dauersignal ('1' oder '0') an.It has been shown that this Task to be solved by the measures described in claim 1. The special feature of the brake system according to the invention is that the Switching the hydraulic valves or the valve lifter from the one in the other end position caused by an alternating signal will only for the duration of the switchover is present and the switchover process in comparison to a pure "one or turn off "the Valve delayed; after switching or after a predetermined switching period then there is again a permanent signal at the hydraulic valve ('1' or '0') on.
Nach einem vorteilhaften Ausführungsbeispiel der Erfindung ist als Wechselsignal eine Pulsfolge vorgesehen, deren Frequenz hoch ist bzw. deren Pulszeiten und Pulspausen kurz sind im Vergleich zu der für den Umschaltvorgang benötigten Zeitdauer.According to an advantageous embodiment the invention, a pulse sequence is provided as an alternating signal, the Frequency is high or the pulse times and pauses are short compared to that for the switching process needed Period of time.
Weitere Vorteile und Anwendungsmöglichkeiten der Erfindung gehen aus der folgenden Darstellung eines Ausführungsbeispiels anhand der beigefügten Abbildungen hervor.Further advantages and possible applications The invention is based on the following illustration of an exemplary embodiment based on the attached Illustrations.
Es zeigenShow it
In
Dargestellt ist hier ein sogen. "geschlossenes" hydraulisches System.
In der Druckabbauphase wird über
das Auslaßventil
Den Aufbau eines Einlaßventils
Das Hydraulikventil
Bei Ansteuerung des Ventils durch
Anlegen einer Spannung an die Ventilspule
Die erfindungswesentliche Ansteuerung
der Hydraulikventile
Während bisher bekanntlich Hydraulikventile der hier beschriebenen Art durch Anlegen einer Spannung bzw. Ausschalten umgeschaltet wurden, wobei das entsprechende Signal nach dem Umschalten in die zweite Endposition bis zum Zurückschalten als Dauersignal aufrechterhalten wurde, wird erfindungsgemäß zum Zeitpunkt t1 ein Wechselsignal angelegt. Nach einer vorgegebenen Zeitspanne, in der der Umschaltvorgang beendet sein soll, oder nach der tatsächlichen Umschaltzeit t1–t2 geht dann das Wechselsignal in ein Dauersignal über, das das Ven til in der Umschaltstellung bzw. den Ventilstößel in der zweiten Endposition hält. Beim Zurückschalten des Ventils, das zum Zeitpunkt t4 ausgelöst wird, wird wiederum in analoger Weise ein Wechselsignal und anschließend das Dauersignal angelegt.While hydraulic valves of the type described here have hitherto been switched over by applying a voltage or switching off, the corresponding signal being maintained as a permanent signal after switching over to the second end position until switching back, an alternating signal is inventively applied at time t 1 . After a predetermined period of time in which the switching process is to be ended, or after the actual switching time t 1 -t 2 , the alternating signal then changes into a continuous signal which holds the valve in the switching position or the valve lifter in the second end position. When the valve is switched back, which is triggered at time t 4 , an alternating signal is again applied in an analog manner and then the continuous signal.
Die Erfindung beruht auf der Überlegung, daß z.B. bei
einem Einlaßventil
der in
Erfindungsgemäß wird daher das Umschalten
mit Hilfe des Wechselsignals oder einer Pulsfolge herbeigeführt. Die
Stößelbewegung
wird dadurch verlangsamt. Bei dem Einlaßventil nach
In der oberen Kurve 'A' in
Den erfindungsgemäß vorgegebenen Verlauf der
an der Spule angelegten Spannung zeigt das Diagramm 'B' in
Den durch den Spannungsverlauf nach 'B' hervorgerufenen Verlauf des Stromes
durch die Spule
Schließlich ist in dem Diagramm 'E' der
Claims (2)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1995124952 DE19524952B4 (en) | 1995-07-08 | 1995-07-08 | Hydraulic brake system with electrically switchable hydraulic valves |
PCT/EP1996/002687 WO1997002970A1 (en) | 1995-07-08 | 1996-06-20 | Hydraulic braking system with electrically switched hydraulic valves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1995124952 DE19524952B4 (en) | 1995-07-08 | 1995-07-08 | Hydraulic brake system with electrically switchable hydraulic valves |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19524952A1 DE19524952A1 (en) | 1997-01-09 |
DE19524952B4 true DE19524952B4 (en) | 2004-08-19 |
Family
ID=7766362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1995124952 Expired - Lifetime DE19524952B4 (en) | 1995-07-08 | 1995-07-08 | Hydraulic brake system with electrically switchable hydraulic valves |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE19524952B4 (en) |
WO (1) | WO1997002970A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3379397B2 (en) * | 1997-08-12 | 2003-02-24 | トヨタ自動車株式会社 | Hydraulic brake device |
JP3768685B2 (en) | 1998-07-01 | 2006-04-19 | 株式会社日立製作所 | Brake fluid pressure control device |
US6913326B1 (en) * | 1998-08-28 | 2005-07-05 | Toyota Jidosha Kabushiki Kaisha | Apparatus for increasing brake cylinder pressure by controlling pump motor and reducing the pressure by controlling electric energy applied to control valve |
DE502004004396D1 (en) * | 2003-11-26 | 2007-08-30 | Bosch Gmbh Robert | METHOD FOR CONTROLLING A TWO-STAGE PILOT VALVE |
DE102004018191A1 (en) * | 2003-11-26 | 2005-07-14 | Robert Bosch Gmbh | Method for driving a two-stage switching valve |
DE102006058085A1 (en) | 2006-06-06 | 2007-12-13 | Continental Teves Ag & Co. Ohg | Method for controlling analogously controlled hydraulic inlet valves |
DE102010029384A1 (en) * | 2010-05-27 | 2011-12-01 | Continental Teves Ag & Co. Ohg | Method for controlling the pressure in a hydraulic system, in particular in an electronically controlled brake system for a motor vehicle |
JP5411118B2 (en) | 2010-12-23 | 2014-02-12 | 本田技研工業株式会社 | Brake device for vehicle |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4213710A1 (en) * | 1992-04-25 | 1993-10-28 | Bosch Gmbh Robert | Antilocking protection and drive slip regulating system for motor vehicle - has at least one return pump which can return pressure medium through open changeover valve to braking line connection of main cylinder |
DE4214685A1 (en) * | 1992-05-02 | 1993-11-04 | Teves Gmbh Alfred | CIRCUIT ARRANGEMENT FOR A BRAKE SYSTEM WITH DRIVE-SLIP CONTROL |
DE4229691A1 (en) * | 1991-03-30 | 1994-03-10 | Teves Gmbh Alfred | Hydraulic brake installation with antilocking and antislip regulation - has electromotor driven hydraulic pump for auxiliary pressure supply in drive slip regulation mode driven at limited speed and PTO |
DE4236047A1 (en) * | 1992-10-24 | 1994-04-28 | Teves Gmbh Alfred | Brake system with anti-lock and / or traction control |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3440885A1 (en) * | 1984-11-09 | 1986-05-15 | Robert Bosch Gmbh, 7000 Stuttgart | Circuit arrangement for switching on solenoid valves |
GB8829902D0 (en) * | 1988-12-22 | 1989-02-15 | Lucas Ind Plc | Control circuit |
DE3843138A1 (en) * | 1988-12-22 | 1990-06-28 | Bosch Gmbh Robert | METHOD OF CONTROLLING AND DETECTING THE MOVEMENT OF AN ARMATURE OF AN ELECTROMAGNETIC SWITCHING DEVICE |
DE3924510C2 (en) * | 1989-07-25 | 1997-07-24 | Teves Gmbh Alfred | Anti-lock, hydraulic brake system |
DE4110254C2 (en) * | 1991-03-28 | 1999-12-30 | Bosch Gmbh Robert | Control circuit for a solenoid valve |
DE4305488A1 (en) * | 1993-02-23 | 1994-08-25 | Bosch Gmbh Robert | Control circuit for a solenoid valve |
-
1995
- 1995-07-08 DE DE1995124952 patent/DE19524952B4/en not_active Expired - Lifetime
-
1996
- 1996-06-20 WO PCT/EP1996/002687 patent/WO1997002970A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4229691A1 (en) * | 1991-03-30 | 1994-03-10 | Teves Gmbh Alfred | Hydraulic brake installation with antilocking and antislip regulation - has electromotor driven hydraulic pump for auxiliary pressure supply in drive slip regulation mode driven at limited speed and PTO |
DE4213710A1 (en) * | 1992-04-25 | 1993-10-28 | Bosch Gmbh Robert | Antilocking protection and drive slip regulating system for motor vehicle - has at least one return pump which can return pressure medium through open changeover valve to braking line connection of main cylinder |
DE4214685A1 (en) * | 1992-05-02 | 1993-11-04 | Teves Gmbh Alfred | CIRCUIT ARRANGEMENT FOR A BRAKE SYSTEM WITH DRIVE-SLIP CONTROL |
DE4236047A1 (en) * | 1992-10-24 | 1994-04-28 | Teves Gmbh Alfred | Brake system with anti-lock and / or traction control |
Also Published As
Publication number | Publication date |
---|---|
WO1997002970A1 (en) | 1997-01-30 |
DE19524952A1 (en) | 1997-01-09 |
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