DE3842224A1 - Brake booster - Google Patents
Brake boosterInfo
- Publication number
- DE3842224A1 DE3842224A1 DE19883842224 DE3842224A DE3842224A1 DE 3842224 A1 DE3842224 A1 DE 3842224A1 DE 19883842224 DE19883842224 DE 19883842224 DE 3842224 A DE3842224 A DE 3842224A DE 3842224 A1 DE3842224 A1 DE 3842224A1
- Authority
- DE
- Germany
- Prior art keywords
- brake
- piston
- brake booster
- booster according
- servo
- 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
Links
Classifications
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- 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
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- 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
-
- 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
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- 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
- B60T8/4004—Repositioning the piston(s) of the brake control means by means of a fluid pressurising means in order to reduce the brake pressure
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- 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
- B60T8/44—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
- B60T8/441—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems using hydraulic boosters
-
- 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
- B60T8/44—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
- B60T8/445—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems replenishing the released brake fluid volume into the brake piping
-
- 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
- B60T8/44—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
- B60T8/447—Reducing the boost of the power-assist booster means to reduce brake pressure
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
Description
Die Erfindung betrifft einen Bremskraftverstärker mit einem Hauptbremszylinder gemäß der Gattung des Hauptan spruches.The invention relates to a brake booster a master brake cylinder according to the genus of the main saying.
Ein derartiger Bremskraftverstärker ist aus der Haupt anmeldung bekannt. Die vorliegende Erfindung soll den in der Hauptanmeldung aufgezeigten Gegenstand vereinfachen und kinematisch anders ausgestalten.Such a brake booster is from the main registration known. The present invention should be the subject indicated in the main application simplify and design differently kinematically.
Ferner ist beispielsweise aus der DE-OS 32 41 662 eine Bremsanlage der oben genannten Art bekannt, bei der ein elektrischer Weggeber angeordnet ist. Bei jeder Bremsung müssen elektrische Kabel für den Geber mitgeführt werden. Dies führt im Laufe der Zeit bei der Vielzahl von Bremsbe tätigungen zu Kabelbrüchen, so daß die Funktion der Brems anlage gefährdet ist. Außerdem muß der als Servokolben ausgebildete Hauptzylinderkolben gegen Verdrehen gesichert werden.Furthermore, for example from DE-OS 32 41 662 Brake system of the type mentioned above, in which a electrical displacement sensor is arranged. With every braking electrical cables for the encoder must be carried. Over time, this results in the large number of brakes Actions on cable breaks, so that the function of the brake plant is at risk. In addition, it must be used as a servo piston trained master cylinder pistons secured against twisting will.
Ein Bremskraftverstärker mit den Merkmalen des Hauptan spruchs verwendet dagegen eine Hebelanordnung, wie sie beispielsweise auch aus der DE-OS 35 02 281 bekannt ist. Diese Hebelanordnung bedient aber in der vorliegenden Erfindung den Weggeber auf mechanische Weise, so daß keine Kabel mitgeführt werden müssen.A brake booster with the characteristics of the main on the other hand uses a lever arrangement like that is also known for example from DE-OS 35 02 281. This lever arrangement is used in the present Invention the encoder in a mechanical way, so that no Cables must be carried.
Über den Weggeber wird eine Elektronik angesteuert, welche das Steuerelement aufgrund Ausgangssignale dieses Weg gebers ansteuert. Über das Steuerelement wird der Servoraum bzw. dessen Zuleitung entweder mit einem Vorratsbehälter für Servoflüssigkeit oder mit einem Druckspeicher bzw. einer Förderpumpe für Servoflüssigkeit verbunden oder gänzlich abgesperrt.Electronics are controlled via the travel sensor, which the control due to output signals this way controls. About the control is the servo room or its supply line either with a storage container for servo fluid or with a pressure accumulator or connected to a feed pump for servo liquid or completely cordoned off.
Das Steuerelement kann beispielsweise ein 3/3-Wege-Magnet ventil sein. Bevorzugt werden allerdings zwei 2/2-Wege-Magnet ventile, wobei eines davon in die Leitung zwischen Servoraum und Vorratsbehälter und das andere in die Leitung zwischen Druckspeicher bzw. Förderpumpe und Servoraum eingeschaltet ist.The control element can be a 3/3-way magnet, for example be a valve. However, two 2/2-way magnets are preferred valves, one of which is in the line between Servo room and reservoir and the other in the line between pressure accumulator or feed pump and servo room is switched on.
Als Weggeber bieten sich auch im vorliegenden Ausführungs beispiel induktive Geber an.In the present version, too, can be used as a travel indicator example of inductive sensors.
Erfindungsgemäß soll die Hebelanordnung aus zwei über ein Drehgelenk miteinander verbundenen Hebeln bestehen. Der erste Hebel greift in eine Ausnehmung in der Kolbenstange gleitend ein, während er andernends mit dem Gehäuse gelenkig verbunden ist. Dies geschieht bevorzugt über eine Kugel, welche in einer Aufnahmemulde eines gehäusefesten Ein schraubteils ruht.According to the lever arrangement of two over a pivot joint interconnected levers exist. The first lever engages in a recess in the piston rod sliding in, while he is articulated with the case elsewhere connected is. This is preferably done using a ball, which in a recess of a housing-fixed one screw part rests.
Der zweite Hebel steht einerseits mit dem Hauptzylinder kolben und andererseits mit dem als Kolben ausgebildeten Weggeber in Wirkverbindung. Wird der erste Hebel durch die Kolbenstange verschoben, bewirkt diese Bewegung eine Scherenbewegung zwischen den beiden Hebeln, so daß der zweite Hebel sich ebenfalls in Richtung der Bewegungsrich tung der Kolbenstange bewegt und den Weggeber mitnimmt.The second lever is on the one hand with the master cylinder piston and on the other hand with the piston Actuator in operative connection. The first lever is through moved the piston rod, this movement causes a Scissor movement between the two levers, so that the second lever also towards the direction of movement movement of the piston rod and takes the displacement sensor with it.
Der Weggeber besteht bevorzugt aus zwei Teilkolben, zwischen denen der zweite Hebel angreift. Der eine Teilkolben soll sich in einer Gehäusebohrung gegen eine Schraubenfeder abstützen, die ihn bzw. den gesamten Kolben in einer vorbe stimmten Ausgangslage hält. Der zweite Teilkolben durch greift mit einem Geberbolzen ein Spulenpaket und bewirkt so bei einer Lageveränderung ein Ausgangssignal für die oben genannte Elektronik. In dieser Elektronik wird das Ausgangssignal verarbeitet und das Steuerelement, d. h. bevorzugt die beiden Magnetventile, entsprechend ange steuert.The displacement sensor preferably consists of two partial pistons, between which the second lever attacks. One part of the piston should in a housing bore against a coil spring support that him or the entire piston in one vorbe agrees starting position. The second piston through grips a coil package with an encoder bolt and effects so with a change in position an output signal for the electronics mentioned above. In this electronics it is Output signal processed and the control, d. H. preferably the two solenoid valves, accordingly controls.
Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Diese zeigt in ihrer einzigen Figur einen teil weise dargestellten Längsschnitt durch einen elektrohydrau lischen Verstärker mit blockschaltbildlich dargestell ter Steuerung einer Zuführeinrichtung für Servoflüssig keit.The invention will now be described with reference to the drawing explained. This shows a part in its single figure wise shown longitudinal section through an electrohydrau amplifier with a block diagram ter control of a feed device for servo liquid speed.
Von dem elektrohydraulischen Verstärker R bzw. Hauptbrems zylinder ist ein geringer Teil eines Bremskammergehäuses 1 mit daran anschließendem Gehäuse 2 für die Servoregelung dargestellt. In einer Bohrung 3 dieses Gehäuses 2 gleitet ein Hauptzylinderkolben 4, der gleichzeitig als Servokolben dient. Dabei bildet er im Bremskammergehäuse 1 eine Brems kammer 5, in der er sich auch gegen eine Schraubenfeder 6 abstützt. A small part of a brake chamber housing 1 with an adjoining housing 2 for the servo control is shown by the electro-hydraulic amplifier R or master brake cylinder. A master cylinder piston 4 , which also serves as a servo piston, slides in a bore 3 in this housing 2 . He forms a brake chamber 5 in the brake chamber housing 1 , in which he is also supported against a coil spring 6 .
Dieser Bremskreis wird durch eine Ringdichtung 7 abgedich tet. Eine weitere Ringdichtung 8 übernimmt die Abdichtung zu einem Servoraum 9 hin. Dieser Servoraum 9 steht über eine Radialbohrung 10 und eine Leitung 11 mit zwei Magnet ventilen 12 und 13 in Verbindung. Auf das Magnetventil 12 folgt ein Vorratsbehälter 14 für Servoflüssigkeit. Dem Magnetventil 13 ist dagegen ein Druckspeicher 15 nachge schaltet, welcher über eine Förderpumpe 16 mit Servoflüssig keit aus dem Vorratsbehälter 14 gefüllt werden kann. Ein Rückschlagventil 17 verhindert ein Zurückfließen von Servo flüssigkeit aus dem Druckspeicher 15 in die Förderpumpe 16. Zur Sicherheit ist noch ein Druckbegrenzungsventil 18 dem Druckspeicher 15 zugeordnet.This brake circuit is sealed by a ring seal 7 . Another ring seal 8 takes over the sealing to a servo space 9 . This servo space 9 is connected via a radial bore 10 and a line 11 with two solenoid valves 12 and 13 . A solenoid 14 for servo liquid follows the solenoid valve 12 . The solenoid valve 13 , on the other hand, a pressure accumulator 15 is switched on, which can be filled via a feed pump 16 with servo liquid speed from the reservoir 14 . A check valve 17 prevents backflow of servo liquid from the pressure accumulator 15 into the feed pump 16 . For safety, a pressure relief valve 18 is also assigned to the pressure accumulator 15 .
Stirnwärtig ist dem Hauptzylinderkolben 4 im Servoraum 9 eine Kolbenstange 19 eingesetzt. Rückwärtig besitzt diese Kolbenstange 19 einen Bördelbund 20, der eine Kugel 21 einer Anlenkstange 22 umschließt. Diese Anlenkstange 22 steht, nicht dargestellt, mit einem Bremspedal in Wirk verbindung.A piston rod 19 is inserted at the front of the master cylinder piston 4 in the servo space 9 . At the rear, this piston rod 19 has a flanged collar 20 which encloses a ball 21 of a link rod 22 . This link rod 22 is, not shown, in operative connection with a brake pedal.
Die Kolbenstange 19 wird von einer Führungshülse 23 in dem Gehäuse 2 geführt, wobei entsprechende Dichtungen 24 und 25 jeweils zwischen Kolbenstange 19 und Führungs hülse 23 bzw. Führungshülse 23 und Gehäuse 2 angeordnet sind.The piston rod 19 is guided by a guide sleeve 23 in the housing 2 , corresponding seals 24 and 25 being arranged between the piston rod 19 and the guide sleeve 23 or the guide sleeve 23 and the housing 2 .
In einer entsprechenden stirnwärtigen Blindbohrung 26 des Hauptzylinderkolbens 4 gleitet ein Teil der Kolben stange 19, wobei diese Kolbenstange 19 gegenüber dem Haupt zylinderkolben 4 mittels eines ein Langloch 27 in der Kolbenstange 19 durchsetzenden Querbolzens 28 geführt ist.In a corresponding front blind bore 26 of the master cylinder piston 4 slides part of the piston rod 19 , this piston rod 19 relative to the master cylinder piston 4 by means of an elongated hole 27 in the piston rod 19 passing through the transverse pin 28 .
Mit der Kolbenstange 19 steht ferner eine Doppelhebel anordnung 29 in Wirkverbindung. Dabei ist ein erster Hebel 30 der Hebelanordnung 29 einerseits über eine in einem Einschraubteil 31 eingreifende Kugel 32 mit dem Gehäuse 2 verbunden. Andererseits greift dieser Hebel 30 in eine Ausnehmung 33 der Kolbenstange 19 ein, wobei er in dieser Ausnehmung 33 gleiten kann.With the piston rod 19 is also a double lever arrangement 29 in operative connection. A first lever 30 of the lever arrangement 29 is connected to the housing 2 on the one hand via a ball 32 engaging in a screw-in part 31 . On the other hand, this lever 30 engages in a recess 33 in the piston rod 19 , and it can slide in this recess 33 .
Am ersten Hebel 30 ist über ein Drehgelenk 34 ein zweiter Hebel 35 gelagert, der sich wiederum einerseits an der Kolbenstange 19 abstützt und andererseits mit einem Kopf 36 mit einem Kolben 37 a eines induktiven Geberteiles 37 verbunden ist.On the first lever 30 , a second lever 35 is mounted via a swivel joint 34 , which in turn is supported on the one hand on the piston rod 19 and on the other hand is connected to a head 36 with a piston 37 a of an inductive transmitter part 37 .
Beidseits des Kopfes 36 besitzt der Kolben 37 a Teilkolben 38 und 39, wobei der Kolben 38 über eine Dichtung 40 abge dichtet in einer Stufenbohrung 41 in dem Gehäuse 2 gleitet. Diese Stufenbohrung 41 ist nach außen über einen mittels eines Sprengringes 42 festgelegten Verschlußdeckel 43 verschlossen. Gegen diesen Verschlußdeckel 43 stützt sich der Teilkolben 38 über eine Schraubenfeder 44 ab.On both sides of the head 36 , the piston 37 has a partial piston 38 and 39 , wherein the piston 38 seals abge via a seal 40 in a stepped bore 41 in the housing 2 slides. This stepped bore 41 is closed to the outside by means of a closure cover 43 fixed by means of a snap ring 42 . The partial piston 38 is supported against this sealing cover 43 by means of a helical spring 44 .
Andererseits des Kopfes 36 gleitet der Teilkolben 39, ebenfalls über eine Dichtung 45 abgedichtet in einer Längs bohrung 46 im Gehäuse 2. Dabei durchsetzt er mit einem Geberbolzen 47 Spulenpakete 48 und bildet so einen induk tiven Weggeber.On the other hand, the head 36 slides the partial piston 39 , also sealed by a seal 45 in a longitudinal bore 46 in the housing 2nd He penetrates 47 coil packs 48 with an encoder bolt and thus forms an inductive displacement encoder.
Die Funktionsweise des erfindungsgemäßen elektrohydrau lischen Verstärkers R ist folgende:The operation of the electro-hydraulic amplifier R according to the invention is as follows:
Über das nicht dargestellte Bremspedal wird auf die Anlenk stange 22 ein Bremsdruck ausgeübt. Diesen Bremsdruck über trägt die Anlenkstange 22 auf die Kolbenstange 19, wobei diese entsprechend der Ausgestaltung des Langlochs 27 einen Leerhub a durchführen kann. Dabei wird über die Hebelanordnung 29 und insbesondere über den zweiten Hebel 35 der Kolben 37 a nach links bewegt, so daß der Geberbolzen 47 eine andere Position im Spulenpaket 48 einnimmt.About the brake pedal, not shown, a brake pressure is exerted on the rod 22 . This brake pressure carries the linkage rod 22 to the piston rod 19 , which can perform an idle stroke a according to the design of the elongated hole 27 . In this case, the piston 37 a is moved to the left via the lever arrangement 29 and in particular via the second lever 35 , so that the master pin 47 assumes a different position in the coil package 48 .
Diese Veränderung des Geberbolzens 47 erzeugt ein Signal über eine elektrische Leitung 49 zu einer Elektronik 50, welche das Signal verarbeitet und über die Leitungen 51 und 52 die Magnetventile 12 und 13 ansteuert. Das Magnet ventil 12 wird geschlossen und das Magnetventil 13 geöffnet. Nunmehr kann Servoflüssigkeit aus dem Druckspeicher 15 über die Leitung 11 in den Servoraum 9 einfließen, so daß der Hauptzylinderkolben 4 ebenfalls nach links ver stellt wird. Dabei nimmt er den zweiten Hebel 35 mit, wodurch der Kolben 37 a wieder in seine Ausgangslage zurück geführt wird. Das hierdurch über die elektrische Leitung 49 der Elektronik 50 eingegebene Signal bewirkt, daß das Magnetventil 13 in Schließstellung geht und der Druck gehalten wird.This change in the transmitter bolt 47 generates a signal via an electrical line 49 to electronics 50 , which processes the signal and controls the solenoid valves 12 and 13 via lines 51 and 52 . The solenoid valve 12 is closed and the solenoid valve 13 is opened. Now servo fluid can flow from the pressure accumulator 15 via the line 11 into the servo space 9 , so that the master cylinder piston 4 is also moved to the left. He takes the second lever 35 , whereby the piston 37 a is returned to its starting position. The signal thereby entered via the electrical line 49 of the electronics 50 causes the solenoid valve 13 to go into the closed position and the pressure is maintained.
Beim Aufheben des Bremsdruckes wird das Magnetventil 12 geöffnet, so daß die Servoflüssigkeit aus dem Servoraum 9 zurück in den Vorratsbehälter 14 gelangen kann.When the brake pressure is released, the solenoid valve 12 is opened so that the servo liquid can get back from the servo space 9 into the storage container 14 .
Claims (11)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19883842224 DE3842224A1 (en) | 1988-12-15 | 1988-12-15 | Brake booster |
US07/424,462 US4967643A (en) | 1988-12-15 | 1989-10-20 | Brake booster |
JP1320721A JPH02258463A (en) | 1988-12-15 | 1989-12-12 | Amplifying device of braking force |
FR8916668A FR2640567A1 (en) | 1988-12-15 | 1989-12-15 | SERVO BRAKE COMBINED WITH A BRAKE MASTER CYLINDER |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19883842224 DE3842224A1 (en) | 1988-12-15 | 1988-12-15 | Brake booster |
DE3842225A DE3842225A1 (en) | 1988-12-15 | 1988-12-15 | BRAKE SYSTEM |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3842224A1 true DE3842224A1 (en) | 1990-08-23 |
Family
ID=25875184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19883842224 Ceased DE3842224A1 (en) | 1988-12-15 | 1988-12-15 | Brake booster |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3842224A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3417018A1 (en) * | 1984-05-09 | 1985-11-14 | Alfred Teves Gmbh, 6000 Frankfurt | HYDRAULIC BRAKE SYSTEM WITH SLIP CONTROL |
-
1988
- 1988-12-15 DE DE19883842224 patent/DE3842224A1/en not_active Ceased
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3417018A1 (en) * | 1984-05-09 | 1985-11-14 | Alfred Teves Gmbh, 6000 Frankfurt | HYDRAULIC BRAKE SYSTEM WITH SLIP CONTROL |
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