DE3903532A1 - Hydraulic motor-vehicle brake system with an anti-lock control device - Google Patents
Hydraulic motor-vehicle brake system with an anti-lock control deviceInfo
- Publication number
- DE3903532A1 DE3903532A1 DE19893903532 DE3903532A DE3903532A1 DE 3903532 A1 DE3903532 A1 DE 3903532A1 DE 19893903532 DE19893903532 DE 19893903532 DE 3903532 A DE3903532 A DE 3903532A DE 3903532 A1 DE3903532 A1 DE 3903532A1
- Authority
- DE
- Germany
- Prior art keywords
- brake
- pressure
- hydraulic pump
- lock control
- hydraulic
- 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- Withdrawn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
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
- B60T8/40—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
- B60T8/4063—Control of the pump unit involving the direction of fluid flow
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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
- B60T13/12—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 the fluid being liquid
- B60T13/16—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 the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
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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
- B60T8/404—Control of the pump unit
- B60T8/4059—Control of the pump unit involving the rate of delivery
-
- 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
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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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
Description
Die Erfindung betrifft eine hydraulische Kraftfahrzeug-Bremsanlage mit Antiblockierregeleinrichtung der im Oberbegriff des Patent anspruchs 1 genannten Art.The invention relates to a hydraulic motor vehicle brake system with anti-lock control device in the preamble of the patent claim 1 Art.
Hydraulische Kraftfahrzeug-Bremsanlagen, bei denen als Brems druck erzeugende Servoeinrichtung nicht mechanisch mit dem Haupt bremszylinder gekoppelte übliche hydraulische oder Unterdruck- Bremskraftverstärker eingesetzt werden, sondern - vorzugsweise elektromotorisch betriebene - Hydraulikpumpen, sind beispielsweise aus der DE-OS 33 42 552 oder 33 42 555 bekannt.Hydraulic motor vehicle braking systems, where as a brake pressure generating servo device not mechanically with the main brake cylinders coupled standard hydraulic or vacuum Brake booster are used, but - preferably For example, hydraulic pumps operated by hydraulic motors known from DE-OS 33 42 552 or 33 42 555.
Bei diesen bekannten hydraulischen Kraftfahrzeug-Bremsanlagen wird der bei Betätigung der Betriebsbremse vom Hauptbremszylinder erzeugte Hydraulikdruck als Führungsgröße für die mit den zuge ordneten Radbremszylindern in Verbindung stehende Hydraulikpumpe verwendet. Dabei wird durch eine elektronische Steuer- und Regel einrichtung oberhalb eines vorbestimmten niedrigen Mindestdruckes des Hauptbremszylinders einerseits die druckmäßige Verbindung zwischen Hauptbremszylinder und den Bremskreisen selbsttätig unterbrochen und andererseits der Ausgangsdruck der Hydraulik pumpe auf einen Wert geregelt, der dem Ausgangsdruck des Haupt bremszylinder proportional, aber höher als dieser ist. In Ver bindung mit einer Antiblockierregeleinrichtung (DE-OS 33 42 555) wird der Ausgangsdruck der Hydraulikpumpe dagegen während solcher Betriebsphasen, in denen die Antiblockierregeleinrichtung regelnd wirksam ist, in Abhängigkeit von einem von der Antiblockierregel einrichtung gelieferten Steuersignal geregelt.In these known hydraulic motor vehicle braking systems becomes when the service brake is applied by the master brake cylinder generated hydraulic pressure as a reference variable for the with the arranged wheel brake cylinders related hydraulic pump used. This is done through an electronic control and regulation device above a predetermined low minimum pressure the master brake cylinder on the one hand the pressure connection between the master brake cylinder and the brake circuits interrupted and on the other hand the outlet pressure of the hydraulics pump regulated to a value that corresponds to the outlet pressure of the main brake cylinder proportional, but higher than this. In ver binding with an anti-lock control device (DE-OS 33 42 555) the output pressure of the hydraulic pump, however, during such Operating phases in which the anti-lock control device regulates is effective, depending on one of the anti-lock rule device supplied control signal regulated.
Der Erfindung liegt nun die Aufgabe zugrunde, den Gesamtaufwand, insbesondere den regelungstechnischen Aufwand, für eine hydrau lische Kraftfahrzeug-Bremsanlage der im Oberbegriff des Patent anspruchs 1 genannten Art unter Gewährleistung einer zuverlässigen Servounterstützung während normaler Bremsbetriebsphasen sowie unter Sicherstellung üblicher Antiblockierregelfunktionen spürbar zu senken.The invention is based on the object, the total effort, especially the control engineering effort for a hydrau lische automobile braking system in the preamble of the patent claim 1 type while ensuring a reliable Servo support during normal braking phases as well noticeable while ensuring normal anti-lock control functions to lower.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patent anspruchs 1 gelöst.This object is achieved by the features of the patent claim 1 solved.
Vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous further developments and refinements of the invention are specified in the subclaims.
Erfindungsgemäß wird durch die Kombination aus in ihrer Förder richtung umschaltbarer Hydraulikpumpe und parallel geschaltetem Verhältnisdruckregelventil während normaler Bremsbetriebsphasen die Funktion der Bremskraftverstärkung und während solcher Be triebsphasen, in denen die Antiblockierregeleinrichtung regelnd wirksam ist, die Funktion eines Druckmodulators wahrgenommen.According to the invention, the combination of in their funding direction switchable hydraulic pump and parallel Ratio pressure control valve during normal braking phases the function of the brake booster and during such loading drive phases in which the anti-lock control device regulates is effective, the function of a pressure modulator is perceived.
Anhand eines in der Zeichnung prinzipienhaft dargestellten Aus führungsbeispieles wird die Erfindung nachstehend näher erläutert.Based on a principle shown in the drawing example, the invention is explained in more detail below.
In der einzigen Figur der Zeichnung ist lediglich ein für das Verständnis der Erfindung notwendiger Ausschnitt einer üblichen hydraulischen Zweikreis-Bremsanlage dargestellt, und zwar nur einer der vom Hauptbremszylinder zu einem der Radbremszylinder führenden Bremsleitungszweige. Die Antiblockierregeleinrichtung der Bremsanlage ist nicht weiter dargestellt. Sie entspricht bezüglich der Signalerfassung und Signalverarbeitung üblichen Antiblockierregeleinrichtungen.In the single figure of the drawing there is only one for the Understanding the invention necessary section of a conventional hydraulic dual-circuit braking system shown, and only one of the master cylinder to one of the wheel brake cylinders leading brake line branches. The anti-lock control device the braking system is not shown. It corresponds usual with regard to signal acquisition and signal processing Anti-lock control devices.
Erfindungsgemäß ist in die vom Hauptbremszylinder 1 zum zuge ordneten Radbremszylinder 3 führende Bremsleitung 5 eine Hydrau likpumpe 4 zwischengeschaltet, die im dargestellten Ausführungs beispiel als Zahnradpumpe ausgebildet ist. According to the invention, in the brake line 5 leading from the master cylinder 1 to the assigned wheel brake cylinder 3, a hydraulic pump 4 is interposed, which in the illustrated embodiment is designed as a gear pump.
Die Hydraulikpumpe ist in ihrer Förderrichtung umschaltbar und wird bei Betätigung der Betriebsbremse, d. h. beim Betätigen des Bremspedals 2 selbsttätig eingeschaltet. Die Zahnradpumpe wird vorzugsweise als elektromotorisch angetriebene Zahnrad pumpe ausgebildet, so daß ihr Ein- und Ausschalten in einfachster Weise über den in einer hydraulischen Bremsanlage üblicherweise vorhandenen elektrischen Bremslichtschalter gesteuert werden kann.The hydraulic pump can be switched in its conveying direction and is switched on automatically when the service brake is actuated, ie when the brake pedal 2 is actuated. The gear pump is preferably designed as an electric motor-driven gear pump, so that its switching on and off can be controlled in the simplest way via the electric brake light switch usually present in a hydraulic brake system.
Der Hydraulikpumpe ist ein bekanntes Verhältnisdruckregelventil 6 als Bypass parallel geschaltet. Ein Verhältnisdruckregelventil, früher auch Druckverhältnisventil genannt, hält das Verhältnis zwischen einem Eingangsdruck und einem Ausgangsdruck selbst tätig konstant, und zwar unabhängig vom veränderlichen Eingangs druck. Das Druckverhältnis ist dabei umgekehrt proportional zum Flächenverhältnis der dem Eingangsdruck bzw. dem Ausgangs druck ausgesetzten Stirnflächen A 2 bzw. A 1 eines im Verhältnis druckregelventil wirksamen Stufenkolbens 9.A known ratio pressure control valve 6 is connected in parallel to the hydraulic pump as a bypass. A ratio pressure control valve, formerly also called a pressure ratio valve, keeps the ratio between an inlet pressure and an outlet pressure itself constant, regardless of the variable inlet pressure. The pressure ratio is inversely proportional to the area ratio of the end faces A 2 or A 1 of the stepped piston 9 which is effective in the ratio of the pressure control valve and which is exposed to the inlet pressure or outlet pressure.
Das Verhältnisdruckregelventil 6 ist derart angeordnet, daß sein mit der größeren Stirnfläche A 2 des Stufenkolbens 9 unmittel bar zusammenwirkender erster Anschluß 7, an dem bei aktiver Reglerfunktion der niedrigere Druck ansteht, hauptbremszylinder seitig und der mit der kleineren Stirnfläche A 1 des Stufenkolbens unmittelbar zusammenwirkende zweite Anschluß 8, an dem bei aktiver Reglerfunktion der höhere Druck ansteht, radbremszylinderseitig mit der Hydraulikpumpe 4 in Verbindung steht.The ratio pressure control valve 6 is arranged such that its with the larger end face A 2 of the stepped piston 9 immediately cooperating first port 7 , at which the lower pressure is applied when the regulator function is active, the master brake cylinder on the side and the one interacting directly with the smaller end face A 1 of the stepped piston Connection 8 , at which the higher pressure is present when the controller function is active, is connected to the hydraulic pump 4 on the wheel brake cylinder side.
In den Betriebsphasen, in denen bei betätigter Betriebsbremse die nicht weiter dargestellte Antiblockierregeleinrichtung nicht wirksam ist, übernimmt die Hydraulikpumpe 4 in Verbindung mit dem parallel geschalteten Verhältnisdruckregelventil 6 die Funktion der Bremskraftverstärkung.In the operating phases in which the anti-lock control device (not shown) is not effective when the service brake is actuated, the hydraulic pump 4, in conjunction with the ratio pressure control valve 6 connected in parallel, takes over the function of the brake booster.
Bei Betätigung des Bremspedals 2 wird einerseits vom nachge schalteten Hauptbremszylinder 1 Druck aufgebaut und anderer seits, z. B. über einen üblichen Bremslichtschalter, die Hydrau likpumpe 4 mit in Richtung des ausgezogenen Pfeils wirkender Förderrichtung eingeschaltet. Die Hydraulikpumpe arbeitet dabei zunächst über den geöffneten Durchlaß 10 des Verhältnisdruck regelventils 6 im Kurzschluß, wobei in den nachgeschalteten Radbremszlyindern 3 allenfalls ein gewisser Staudruck entsteht. Gleichzeitig wird der Stufenkolben 9 unter der Wirkung des sich aufbauenden Ausgangsdrucks P Hz des Hauptbremszylinders 1, der ja an der Differenzfläche A 2-A 1 des Stufenkolbens angreift, axial verschoben, so daß der Durchlaß 10 des Verhältnisdruck regelventils letztlich verschlossen wird.When the brake pedal 2 on the one hand from the nachge off the master cylinder 1 pressure is built and on the other hand, z. B. via a conventional brake light switch, the hydrau likpump 4 turned on with the direction of the solid arrow conveying direction. The hydraulic pump works first through the open passage 10 of the ratio pressure control valve 6 in a short circuit, wherein at most a certain dynamic pressure arises in the downstream wheel brake cylinders 3 . At the same time, the stepped piston 9 is axially displaced under the effect of the starting pressure P Hz of the master brake cylinder 1 , which acts on the differential surface A 2 - A 1 of the stepped piston, so that the passage 10 of the ratio pressure control valve is ultimately closed.
Nach Fortfall des Kurzschlusses baut sich ausgangs der Hydraulikpumpe 4 und damit auch im Radbremszylinder 3 ein durch das Verhältnisdruckregelventil 6 geregelter Druck P Servo auf, dessen Höhe vom Flächenverhältnis des Verhältnisdruckregelventils sowie vom als Eingangsdruck wirkenden Ausgangsdruck P Hz des Hauptbremszylinders 1 abhängt. Das Verhältnisdruckregelventil hält nämlich das Verhältnis zwischen seinem dem Ausgangsdruck P Hz des Hauptbremszylinders 1 entsprechenden Eingangsdruck und seinem dem Hydraulikpumpen-Ausgangdruck P Servo entsprechenden Ausgangsdruck unabhängig vom veränderlichen Eingangsdruck konstant im VerhältnisAfter the short circuit has ceased, a pressure P servo , which is regulated by the ratio pressure control valve 6, builds up at the outlet of the hydraulic pump 4 and thus also in the wheel brake cylinder 3 , the level of which depends on the area ratio of the ratio pressure control valve and on the output pressure P Hz of the master brake cylinder 1 acting as input pressure. The ratio pressure control valve keeps the ratio between its inlet pressure corresponding to the outlet pressure P Hz of the master brake cylinder 1 and its outlet pressure corresponding to the hydraulic pump outlet pressure P servo constant irrespective of the variable inlet pressure
Die Radbremszylinder 3 werden so mit einem geregelten Servodruck P Servo gespeist, der entsprechend der Betätigung des Bremspedals 2 stufenlos erhöht bzw. verringert werden kann.The wheel brake cylinders 3 are thus fed with a controlled servo pressure P servo , which can be increased or decreased continuously in accordance with the actuation of the brake pedal 2 .
Mit Vorteil wird - wie im Ausführungsbeispiel - eine Zahnrad pumpe als Hydraulikpumpe 4 eingesetzt. Dann ist gewährleistet, daß die Grundfunktion der hydraulischen Kraftfahrzeug-Bremsanlage auch bei einem Ausfall des Pumpenantriebs, d. h. bei Ausfall der Funktion der Bremskraftverstärkung erhalten bleibt, weil über die sich dann frei mitdrehenden Zahnräder in üblicher Weise Hydraulikflüssigkeit vom Hauptbremszylinder 1 zu den Radbrems zylindern 3 gefördert werden kann. As in the exemplary embodiment , a gear pump is advantageously used as hydraulic pump 4 . Then it is ensured that the basic function of the hydraulic motor vehicle brake system is retained even in the event of a failure of the pump drive, ie in the event of failure of the function of the brake booster, because hydraulic fluids are conveyed from the master cylinder 1 to the wheel brake cylinders 3 in the usual manner via the gears which then rotate freely can be.
In den Betriebsphasen, in denen bei betätigter Betriebsbremse die Antiblockierregeleinrichtung regelnd wirksam wird, wird die Hydraulikpumpe 4 zur Druckmodulation herangezogen. Beim Regelerfordernis "Druckabbauen" wird die Hydraulikpumpe 4 durch ein entsprechendes Steuersignal der nicht weiter dargestellten Steuer- und Regelelektronik der Antiblockierregeleinrichtung in ihrer Förderrichtung in Richtung Hauptbremszylinder umge schaltet, was in der Figur mit gestrichelten Pfeilen angedeutet ist. Aufgrund der gegebenen Druckverhältnisse wird dabei der Durchlaß 10 im Verhältnisdruckregelventil 6 durch den sich ver lagernden Stufenkolben 9 verschlossen und Hydraulikflüssigkeit aus den Radbremszylindern - deren Hydraulikdruck den Regeler fordernissen entsprechend absenkend - in den Hauptbremszylinder 1 zurückbefördert, und zwar so lange, wie das Regelerfordernis "Druckabsenken" besteht.In the operating phases in which the anti-lock control device becomes regulatingly effective when the service brake is actuated, the hydraulic pump 4 is used for pressure modulation. In the case of the control requirement "pressure reduction", the hydraulic pump 4 is switched by a corresponding control signal of the control and regulating electronics (not shown) of the anti-lock control device in its conveying direction in the direction of the master brake cylinder, which is indicated in the figure by dashed arrows. Due to the given pressure conditions, the passage 10 in the ratio pressure control valve 6 is closed by the step piston 9, which is located in the ver, and hydraulic fluid from the wheel brake cylinders - the hydraulic pressure of which reduces the control requirements accordingly - is returned to the master brake cylinder 1 , for as long as the control requirement "lowering pressure"" consists.
Sobald das Regelerfordernis "Druckabsenken" wegen nicht mehr bestehender Blockiergefährdung der Räder fortgefallen ist, wird die Hydraulikpumpe 4 wieder in ihre ursprüngliche Förderrichtung zurückgeschaltet. Von Vorteil ist es, daß die Förderleistung der Hydraulikpumpe 4 in einfacher Weise geregelt werden kann, z. B. durch Regelung der Pumpendrehzahl. Dadurch ist es in vor teilhafter Weise möglich, die Charakteristik des bei Antiblockier regelung erfolgenden Druckabbaus zu beeinflussen, z. B. in Ab hängigkeit von der zugeordneten Raddrehzahl.As soon as the control requirement "pressure lowering" has ceased to exist because the wheels are no longer at risk of locking, the hydraulic pump 4 is switched back into its original delivery direction. It is advantageous that the delivery rate of the hydraulic pump 4 can be regulated in a simple manner, for. B. by controlling the pump speed. This makes it possible in an advantageous manner to influence the characteristic of the pressure reduction taking place in the case of anti-lock control, for. B. in dependence on the assigned wheel speed.
Im dargestellten Ausführungsbeispiel ist die Hydraulikpumpen/Ver hältnisdruckregelventil-Anordnung 4/6 unmittelbar dem einen Radbremszylinder 3 zugeordnet; in entsprechender Weise können den übrigen drei Rädern eines vierrädrigen Kraftfahrzeuges je eine solche Anordnung zugeordnet sein. Grundsätzlich hängt es jedoch vom Aufbau und der Art der hydraulischen Kraftfahrzeug-Brems anlage sowie der eingesetzten Antiblockierregeleinrichtung ab, ob jeweils sämtlichen Rädern einzeln oder aber Gruppen von ihnen eine solche Anordnung zuzuordnen ist. In the illustrated embodiment, the hydraulic pumps / Ver ratio pressure control valve arrangement 4/6 is directly assigned to the one wheel brake cylinder 3 ; in a corresponding manner, such an arrangement can be assigned to the remaining three wheels of a four-wheel motor vehicle. Basically, however, it depends on the structure and type of the hydraulic motor vehicle brake system and the anti-lock control device used, whether all the wheels individually or groups of them is assigned such an arrangement.
Es ist auch denkbar, die Hydraulikpumpe 4 zusätzlich im Rahmen einer bekannten Antriebsschlupfregelung (ASR) einzusetzen, um - ohne Zutun des Fahrzeuglenkers - beim entsprechenden Regeler fordernis die betroffenen Antriebsräder abzubremsen. Hierzu muß lediglich zum einen die Hydraulikpumpe 4 von der Steuer- und Regelelektronik der Antriebsschlupfregeleinrichtung einge schaltet (Förderrichtung im Sinne des ausgezogenen Pfeils) und zum anderen der Weg über das parallel liegende Verhältnisdruck regelventil 6 gesperrt werden, was z. B. mit Hilfe eines vorge schalteten Magnetventils in einfacher Weise erfolgen kann.It is also conceivable to use the hydraulic pump 4 additionally in the context of a known traction control system (ASR) in order to brake the drive wheels concerned, without the driver's intervention , when the appropriate control requirement is met. To do this, the hydraulic pump 4 must only be switched on by the control electronics of the traction control device (conveying direction in the direction of the solid arrow) and, on the other hand, the path via the parallel pressure control valve 6 must be blocked, which, for. B. can be done in a simple manner with the help of an upstream solenoid valve.
Claims (3)
daß die Hydraulikpumpe (4) jeweils in die vom Hauptbremszylinder (1) zu den zugeordneten Rad bremszylindern (3) führende Bremsleitung (5) zwischengeschal tet ist,
daß die Hydraulikpumpe (4) in ihrer Förderrichtung umschalt bar und bei Betätigung der Betriebsbremse selbsttätig ein schaltbar ist,
und daß der Hydraulikpumpe (4) ein Verhältnisdruckregelven til (6) als Bypass parallel geschaltet ist, welches mit seinem bei aktiver Reglerfunktion niedrigerdruckigen ersten Anschluß (7) hauptbremszylinderseitig und mit seinem dann höherdruckigen zweiten Anschluß (8) radbremszylinderseitig mit der Hydraulik pumpe (4) in Verbindung steht.1.Hydraulic motor vehicle brake system with anti-lock control device, with a pedal-operated master brake cylinder and at least one controllable hydraulic pump which is connected to associated wheel brake cylinders and which, when the anti-lock control is inactive, increases the function of a braking force and, when the anti-lock control is active, takes over the function of brake pressure modulation, characterized in that
that the hydraulic pump ( 4 ) in each of the master brake cylinder ( 1 ) to the associated wheel brake cylinders ( 3 ) leading brake line ( 5 ) is switched,
that the hydraulic pump ( 4 ) can be switched in its conveying direction and can be switched on automatically when the service brake is applied,
and that the hydraulic pump ( 4 ) has a ratio pressure regulating valve ( 6 ) connected in parallel as a bypass, which with its lower pressure first connection ( 7 ) when the controller function is active and on the master cylinder side with its then higher pressure second connection ( 8 ) wheel brake cylinder side with the hydraulic pump ( 4 ) communicates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19893903532 DE3903532A1 (en) | 1988-02-18 | 1989-02-07 | Hydraulic motor-vehicle brake system with an anti-lock control device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3805022 | 1988-02-18 | ||
| DE19893903532 DE3903532A1 (en) | 1988-02-18 | 1989-02-07 | Hydraulic motor-vehicle brake system with an anti-lock control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3903532A1 true DE3903532A1 (en) | 1989-08-31 |
Family
ID=25864963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19893903532 Withdrawn DE3903532A1 (en) | 1988-02-18 | 1989-02-07 | Hydraulic motor-vehicle brake system with an anti-lock control device |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3903532A1 (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0388634A1 (en) * | 1989-03-21 | 1990-09-26 | Robert Bosch Gmbh | Anti locking and traction slip-limiting device |
| DE4000837A1 (en) * | 1990-01-13 | 1991-07-18 | Teves Gmbh Alfred | HYDRAULIC BRAKE SYSTEM WITH A DEVICE FOR BRAKE AND / OR DRIVE SLIP CONTROL |
| DE4027565A1 (en) * | 1990-01-13 | 1992-03-05 | Teves Gmbh Alfred | Anti-slip hydraulic braking system for vehicle - involves insertion of pressure responsive switching valve |
| US5288142A (en) * | 1990-01-13 | 1994-02-22 | Alfred Teves Gmbh | Hydraulic brake system including slip control |
| US5297862A (en) * | 1990-08-31 | 1994-03-29 | Alfred Teves Gmbh | Hydraulic brake system controlling slip |
| DE4405918A1 (en) * | 1994-02-24 | 1995-08-31 | Teves Gmbh Alfred | Car brake system with traction control |
| EP0774391A1 (en) * | 1995-11-15 | 1997-05-21 | LUCAS INDUSTRIES public limited company | Brake actuating unit |
| WO1998013243A1 (en) * | 1996-09-23 | 1998-04-02 | Itt Manufacturing Enterprises, Inc. | Hydraulic brake system with hydraulic servo brake |
| WO1998017516A1 (en) * | 1996-10-21 | 1998-04-30 | Robert Bosch Gmbh | Slip-controlled hydraulic vehicle brake system |
| WO1998047749A1 (en) * | 1997-04-18 | 1998-10-29 | Lucas Industries Public Limited Company | Brake pressure transmitter unit for a hydraulic brake system for motor vehicles, and brake system fitted with same unit |
| US6161903A (en) * | 1997-04-18 | 2000-12-19 | Lucas Industries Public Limited Company | Brake-pressure-transmitter arrangement for a hydraulic motor-vehicle brake system, and brake system equipped therewith |
| WO2001007307A1 (en) * | 1999-07-28 | 2001-02-01 | Continental Teves Ag & Co. Ohg | Hydraulic brake system |
| WO2001054956A1 (en) * | 2000-01-28 | 2001-08-02 | Continental Teves Ag & Co. Ohg | Electrohydraulic vehicle braking system |
| EP1826083A1 (en) | 2006-02-22 | 2007-08-29 | Nissan Motor Company Limited | Vehicle Brake Apparatus and Method |
| WO2013013859A3 (en) * | 2011-07-26 | 2013-04-11 | Robert Bosch Gmbh | Brake system for a vehicle and method for operating a brake system of a vehicle |
| DE102012223497A1 (en) * | 2012-12-18 | 2014-06-18 | Continental Teves Ag & Co. Ohg | Brake system for motor vehicle, has inlet valves opened during normal braking, and system pressure conducting sections formed between inlet connections and pressure side of pump for assigning pressure medium volume flow to brakes |
| CN110273948A (en) * | 2019-07-04 | 2019-09-24 | 北汽福田汽车股份有限公司 | Hydraulic brake and vehicle with it |
| DE102013211144B4 (en) | 2012-12-13 | 2024-07-04 | Robert Bosch Gmbh | Slip-controlled hydraulic vehicle braking system |
-
1989
- 1989-02-07 DE DE19893903532 patent/DE3903532A1/en not_active Withdrawn
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0388634A1 (en) * | 1989-03-21 | 1990-09-26 | Robert Bosch Gmbh | Anti locking and traction slip-limiting device |
| DE4000837A1 (en) * | 1990-01-13 | 1991-07-18 | Teves Gmbh Alfred | HYDRAULIC BRAKE SYSTEM WITH A DEVICE FOR BRAKE AND / OR DRIVE SLIP CONTROL |
| DE4027565A1 (en) * | 1990-01-13 | 1992-03-05 | Teves Gmbh Alfred | Anti-slip hydraulic braking system for vehicle - involves insertion of pressure responsive switching valve |
| US5288142A (en) * | 1990-01-13 | 1994-02-22 | Alfred Teves Gmbh | Hydraulic brake system including slip control |
| DE4000837B4 (en) * | 1990-01-13 | 2005-03-03 | Continental Teves Ag & Co. Ohg | Hydraulic brake system with a device for braking and / or traction control |
| US5297862A (en) * | 1990-08-31 | 1994-03-29 | Alfred Teves Gmbh | Hydraulic brake system controlling slip |
| DE4405918A1 (en) * | 1994-02-24 | 1995-08-31 | Teves Gmbh Alfred | Car brake system with traction control |
| EP0774391A1 (en) * | 1995-11-15 | 1997-05-21 | LUCAS INDUSTRIES public limited company | Brake actuating unit |
| US6328388B1 (en) | 1995-11-15 | 2001-12-11 | Lucas Industries Public Limited Company | Brake actuation unit |
| DE19542657C2 (en) * | 1995-11-15 | 2001-06-21 | Lucas Ind Plc | Vehicle brake actuation unit |
| US6220675B1 (en) | 1996-09-23 | 2001-04-24 | Continental Teves Ag & Co., Ohg | Hydraulic brake system with hydraulic servo brake |
| WO1998013243A1 (en) * | 1996-09-23 | 1998-04-02 | Itt Manufacturing Enterprises, Inc. | Hydraulic brake system with hydraulic servo brake |
| WO1998017516A1 (en) * | 1996-10-21 | 1998-04-30 | Robert Bosch Gmbh | Slip-controlled hydraulic vehicle brake system |
| US6161903A (en) * | 1997-04-18 | 2000-12-19 | Lucas Industries Public Limited Company | Brake-pressure-transmitter arrangement for a hydraulic motor-vehicle brake system, and brake system equipped therewith |
| WO1998047749A1 (en) * | 1997-04-18 | 1998-10-29 | Lucas Industries Public Limited Company | Brake pressure transmitter unit for a hydraulic brake system for motor vehicles, and brake system fitted with same unit |
| WO2001007307A1 (en) * | 1999-07-28 | 2001-02-01 | Continental Teves Ag & Co. Ohg | Hydraulic brake system |
| US6851763B1 (en) | 1999-07-28 | 2005-02-08 | Continental Teves Ag & Co., Ohg | Hydraulic brake system |
| WO2001054956A1 (en) * | 2000-01-28 | 2001-08-02 | Continental Teves Ag & Co. Ohg | Electrohydraulic vehicle braking system |
| EP1826083A1 (en) | 2006-02-22 | 2007-08-29 | Nissan Motor Company Limited | Vehicle Brake Apparatus and Method |
| US8201896B2 (en) | 2006-02-22 | 2012-06-19 | Nissan Motor Co., Ltd. | Vehicle brake apparatus and method |
| WO2013013859A3 (en) * | 2011-07-26 | 2013-04-11 | Robert Bosch Gmbh | Brake system for a vehicle and method for operating a brake system of a vehicle |
| CN103702873A (en) * | 2011-07-26 | 2014-04-02 | 罗伯特·博世有限公司 | Brake system for a vehicle and method for operating a brake system of a vehicle |
| DE102013211144B4 (en) | 2012-12-13 | 2024-07-04 | Robert Bosch Gmbh | Slip-controlled hydraulic vehicle braking system |
| DE102012223497A1 (en) * | 2012-12-18 | 2014-06-18 | Continental Teves Ag & Co. Ohg | Brake system for motor vehicle, has inlet valves opened during normal braking, and system pressure conducting sections formed between inlet connections and pressure side of pump for assigning pressure medium volume flow to brakes |
| CN110273948A (en) * | 2019-07-04 | 2019-09-24 | 北汽福田汽车股份有限公司 | Hydraulic brake and vehicle with it |
| CN110273948B (en) * | 2019-07-04 | 2021-07-16 | 北汽福田汽车股份有限公司 | Hydraulic brake and vehicle with same |
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| 8120 | Willingness to grant licenses paragraph 23 | ||
| 8139 | Disposal/non-payment of the annual fee |