DE4220835A1 - Antiskid hydraulic brake control with reduced valve noise - has recirculating pump driving through flow restriction switched by pressure control valve - Google Patents
Antiskid hydraulic brake control with reduced valve noise - has recirculating pump driving through flow restriction switched by pressure control valveInfo
- Publication number
- DE4220835A1 DE4220835A1 DE19924220835 DE4220835A DE4220835A1 DE 4220835 A1 DE4220835 A1 DE 4220835A1 DE 19924220835 DE19924220835 DE 19924220835 DE 4220835 A DE4220835 A DE 4220835A DE 4220835 A1 DE4220835 A1 DE 4220835A1
- Authority
- DE
- Germany
- Prior art keywords
- brake
- line
- valve
- pressure
- pump
- 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
- 230000003134 recirculating effect Effects 0.000 title 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- B60T8/4863—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
- B60T8/4872—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems
-
- 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
- B60T8/3675—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units
- B60T8/368—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units combined with other mechanical components, e.g. pump units, master cylinders
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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
- B60T8/4054—Control of the pump unit involving the delivery pressure control
-
- 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
- B60T8/44—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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Regulating Braking Force (AREA)
Abstract
Description
Die Erfindung betrifft eine schlupfgeregelte hydraulische Bremsanlage der im Oberbegriff des Hauptanspruchs genannten Gattung. Solche Bremsanlagen - ob sie nun ein offenes System darstellen, bei welchem die Pumpe aus einem drucklosen Nachlaufbehälter ansaugt oder ob sie nach dem Rückförderprinzip arbeiten, wobei die Pumpe bei einer Bremsschlupfregelung aus einem Niederdruckspeicher fördert - sind mit und ohne zusätzliche Einrichtungen zur Antriebsschlupfregelung vielfach bekannt geworden. Solche Bremsanlagen haben sich in der Praxis bewährt. Während einer Schlupfregelung, sei es Bremsschlupf- oder Antriebsschlupfregelung, treten jedoch oftmals laute Regelgeräusche auf, bedingt durch plötzliche Druckstöße an den Einlaßventilen.The invention relates to a slip-controlled hydraulic Brake system in the preamble of the main claim called genus. Such braking systems - whether they are represent an open system, in which the pump from one unpressurized waste tank or whether after the Return principle work, the pump at one Brake slip control promotes from a low pressure accumulator - are available with and without additional facilities Traction control system has become widely known. Such Braking systems have proven themselves in practice. While a slip control, be it brake slip or Traction control, but often occur loud Control noises due to sudden pressure surges the inlet valves.
Die Aufgabe der vorliegenden Erfindung besteht daher darin, eine gattungsgemäße Bremsanlage zu schaffen, deren Geräuschentwicklung stark vermindert ist, wobei die Funktionssicherheit aber unbeeinträchtigt bleibt.The object of the present invention is therefore in creating a generic brake system whose Noise is greatly reduced, the Functional safety remains unaffected.
Diese Aufgabe wird gelöst durch die Merkmale des kennzeichnenden Teils des Hauptanspruchs. Das Prinzip der Erfindung besteht also darin, daß im Regelzyklus der Druckaufbau vor den Einlaßventilen stetig erfolgt und nicht ruckartig. Dabei steht aber schließlich der volle Pumpendruck für die Regelung zur Verfügung.This task is solved by the characteristics of the characteristic part of the main claim. The principle of The invention thus consists in the fact that in the control cycle Pressure build-up in front of the inlet valves is constant and not jerky. But finally the full one stands Pump pressure available for regulation.
Die Verwendung eines Schaltventils in der Bremsleitung, welches in seiner Grundstellung eine ungedrosselte Verbindung zwischen Hauptbremszylinder und Einlaßventil herstellt, läßt die Radbremsen schnell ansprechen, solange der Bremsschlupf unkritisch für die Fahrstabilität ist.The use of a switching valve in the brake line, which in its basic position is an unthrottled one Connection between master brake cylinder and inlet valve manufactures, the wheel brakes respond quickly, as long the brake slip is not critical for driving stability.
Durch die hydraulische Betätigung des Schaltventils mittels des Pumpendrucks werden gegenüber Magnetventilen elektrische Leitungen eingespart.Through the hydraulic actuation of the switching valve by means of the pump pressure compared to solenoid valves electrical lines saved.
Eine platzsparende Anordnung ergibt sich, wenn für die Druckleitung und die Bremsleitung ein gemeinsames Schaltventil verwendet wird.A space-saving arrangement results if for the Pressure line and the brake line a common Switch valve is used.
Dabei ist es von Vorteil, das Schaltventil mit in das Gehäuse der Pumpe einzubauen, so daß die Verwendung eines herkömmlichen Ventilblocks für die Einlaß- und Auslaßventile möglich ist.It is advantageous to include the switching valve in the Install the pump housing so that the use of a conventional valve blocks for the inlet and Exhaust valves is possible.
Eine nähere Erläuterung des Erfindungsgedankens erfolgt durch die Beschreibung zweier Ausführungsbeispiele anhand von zwei Zeichnungen. Es zeigt:A more detailed explanation of the inventive concept is given by describing two exemplary embodiments of two drawings. It shows:
Fig. 1 eine blockiergeschützte Bremsanlage, die nach dem Rückförderprinzip arbeitet, mit einer Einrichtung zur Antriebsschlupfregelung; Figure 1 is an anti-lock brake system, which works on the return principle, with a device for traction control.
Fig. 2 eine blockiergeschützte Bremsanlage, die ein sogenanntes offenes System bildet. Fig. 2 is an anti-lock brake system, which forms a so-called open system.
Zunächst sei auf Fig. 1 Bezug genommen. Die dargestellte Bremsanlage besitzt eine diagonale Bremskreisaufteilung, so daß zu jedem der beiden Bremskreise I und II eine Radbremse eines angetriebenen Rades und eine Radbremse eines nichtangetriebenen Rades angehört. Da die Bremskreise I und II identisch aufgebaut sind, ist nur der Bremskreis II im Detail dargestellt.First, reference is made to FIG. 1. The brake system shown has a diagonal brake circuit division so that a wheel brake of a driven wheel and a wheel brake of a non-driven wheel belong to each of the two brake circuits I and II. Since brake circuits I and II are constructed identically, only brake circuit II is shown in detail.
Vom Hauptbremszylinder 1, an den der Druckmittelbehälter 2 angeschlossen ist, führt die Hauptbremsleitung 3 über die Bremszweigleitung 4 bzw. über die Zwischenleitung 6 und die Bremszweigleitung 5 zu den Radbremsen 7 und 8. Dabei gehört die Radbremse 7 zu einem angetriebenen Rad, während die Radbremse 8 zu einem nichtangetriebenen Rad gehört.The main brake line 3 leads from the master brake cylinder 1 , to which the pressure medium container 2 is connected, via the brake branch line 4 or via the intermediate line 6 and the brake branch line 5 to the wheel brakes 7 and 8 . The wheel brake 7 belongs to a driven wheel, while the wheel brake 8 belongs to a non-driven wheel.
Von den Radbremsen 7 und 8 verläuft die Rücklaufleitung 9 zum Niederdruckspeicher 10. Von dort führt die ABS-Saugleitung 11 zur Saugseite der Pumpe 12. Die Saugseite der Pumpe 12 ist außerdem über die ASR-Saugleitung 13 an die Bremsleitung angeschlossen, so daß die Pumpe im Fall einer Antriebsschlupfregelung (ASR) durch den Hauptbremszylinder 1 aus dem Druckmittelbehälter 2 Druckmittel ansaugen kann. Die Druckseite der Pumpe 12 ist über die Druckleitung 14 an die Hauptbremsleitung 3 angeschlossen. The return line 9 runs from the wheel brakes 7 and 8 to the low-pressure accumulator 10 . From there, the ABS suction line 11 leads to the suction side of the pump 12 . The suction side of the pump 12 is also connected to the brake line via the ASR suction line 13 , so that the pump can suck in pressure medium from the pressure medium container 2 through the master brake cylinder 1 in the case of a traction control system (ASR). The pressure side of the pump 12 is connected to the main brake line 3 via the pressure line 14 .
Zur Bremsdruckregelung in den Radbremsen 7 und 8 sind in den Bremszweigleitungen 4 und 5 jeweils ein Einlaßventil 15 bzw. 16 angeordnet sowie zwischen den Radbremsen 7 und 8 und der Rücklaufleitung 9 die Auslaßventile 17 und 18. Diese vier Ventile werden elektromagnetisch betätigt. Außer diesen gibt es nur noch ein elektromagnetisch betätigtes Ventil, nämlich das Trennventil 19, welches in der Zwischenleitung 6 angeordnet ist und zur Trennung der Radbremsen angetriebener und nichtangetriebener Räder bei einer Antriebsschlupfregelung dient.For brake pressure control in the wheel brakes 7 and 8 , an inlet valve 15 and 16 are arranged in the brake branch lines 4 and 5, respectively, and the outlet valves 17 and 18 between the wheel brakes 7 and 8 and the return line 9 . These four valves are operated electromagnetically. In addition to these, there is only one electromagnetically actuated valve, namely the isolating valve 19 , which is arranged in the intermediate line 6 and is used to separate the wheel brakes of driven and non-driven wheels in the case of traction control.
Ansonsten gibt es noch zwei hydraulisch betätigte Ventile. Das erste ist das Schaltventil 20, ein 4-/2-Wegeventil, welches zwei Anschlüsse für die Hauptbremsleitung 3 besitzt und zwei Anschlüsse für die Druckleitung 14. Seine Position in der Hauptbremsleitung 3 liegt zwischen dem Anschluß der ASR-Saugleitung 13 und der Aufspaltung der Hauptbremsleitung in Zwischenleitung 6 und Bremszweigleitung 4. In seiner Grundstellung hält es die Verbindung zwischen den zwei der Hauptbremsleitung 3 zuzuordnenden Anschlüsse geöffnet, während die Druckleitung 14 gesperrt ist. In seiner Schaltstellung ist die Druckleitung 14 geöffnet und die Hauptbremsleitung 3 gesperrt. Es wird durch den Förderdruck der Pumpe 12 betätigt.Otherwise there are two hydraulically operated valves. The first is the switching valve 20 , a 4- / 2-way valve, which has two connections for the main brake line 3 and two connections for the pressure line 14 . Its position in the main brake line 3 lies between the connection of the ASR suction line 13 and the splitting of the main brake line into intermediate line 6 and brake branch line 4th In its basic position, it keeps the connection between the two connections to be assigned to the main brake line 3 open, while the pressure line 14 is blocked. In its switching position, the pressure line 14 is open and the main brake line 3 is blocked. It is operated by the delivery pressure of the pump 12 .
Das zweite hydraulisch betätigte Ventil ist das Sperrventil 21, welches in der ASR-Saugleitung angeordnet ist und bei jeder pedalbetätigten Bremsung die ASR-Saugleitung 13 sperrt. Bei drucklosem Hauptbremszylinder 1 ist das Sperrventil 21 stets geöffnet.The second hydraulically operated valve is the shut-off valve 21 , which is arranged in the ASR suction line and blocks the ASR suction line 13 with each pedal-operated braking. When the master brake cylinder 1 is depressurized, the check valve 21 is always open.
Zur Vermeidung von Druckstößen an den Einlaßventilen 15 und 16 sind im Bremskreis 11 zwei Blenden eingesetzt, von denen die eine, die Pumpenblende 22 in der Druckleitung 14 zwischen dem Schaltventil 20 und der Einmündung der Druckleitung 14 in die Hauptbremsleitung 3 liegt. Die zweite Blende, die Bremsblende 23, sitzt in der Nebenbremsleitung 24, die die Hauptbremsleitung 3 oberhalb des Schaltventils 20 mit der Bremszweigleitung 5 verbindet, so daß parallel zum Schaltventil 20 die Nebenbremsleitung 24 und die Zwischenleitung 6 angeordnet sind.To avoid pressure surges at the inlet valves 15 and 16 , two orifices are used in the brake circuit 11 , one of which, the pump orifice 22 in the pressure line 14 between the switching valve 20 and the confluence of the pressure line 14 in the main brake line 3 . The second orifice, the brake orifice 23 , is located in the secondary brake line 24 , which connects the main brake line 3 above the switching valve 20 with the brake branch line 5 , so that the secondary brake line 24 and the intermediate line 6 are arranged parallel to the switching valve 20 .
Schließlich gibt es noch eine Reihe von Rückschlagventilen mit und ohne Vordruck, die zur Sicherheit der Bremsanlage beitragen. Insbesondere das Rückschlagventil 25, das zur Bremsblende 23 parallel geschaltet ist, sei hier erwähnt. Es trägt dazu bei, daß bei Beendigung einer Bremsbetätigung das Druckmittel ungehindert zurück zum Hauptbremszylinder 1 und damit zum Druckmittelbehälter 2 gelangen kann. Außerdem sind dem Trennventil 19 das Rückschlagventil 26, welches zu den Radbremsen hin öffnet, und das Überdruckventil 30, welches zum Hauptbremszylinder hin öffnet, parallel geschaltet. Auch parallel zu den Einlaßventilen 15 und 16 liegt jeweils ein Rückschlagventil 27 bzw. 28, welches zum Hauptbremszylinder hin öffnet. In die ABS-Saugleitung 11 ist das Vordruckventil 29 eingesetzt, welches in Pumpenförderrichtung öffnet, und die Radbremsen vor Unterdruck schützt. Schließlich besitzt die Pumpe 12 an ihrer Saugseite und an ihrer Druckseite jeweils ein Rückschlagventil, nämlich das Saugventil 31 bzw. das Druckventil 32.Finally, there are a number of check valves with and without pre-pressure that contribute to the safety of the brake system. In particular, the check valve 25 , which is connected in parallel to the brake orifice 23 , is mentioned here. It contributes to the pressure medium being able to return unhindered to the master cylinder 1 and thus to the pressure medium container 2 when a brake application is ended. In addition, the check valve 26 , which opens towards the wheel brakes, and the pressure relief valve 30 , which opens towards the master brake cylinder, are connected in parallel with the isolating valve 19 . Also in parallel to the inlet valves 15 and 16 is a check valve 27 and 28 , respectively, which opens towards the master cylinder. In the ABS suction line 11 , the admission pressure valve 29 is inserted, which opens in the pump delivery direction and protects the wheel brakes from negative pressure. Finally, the pump 12 has a check valve on its suction side and on its pressure side, namely the suction valve 31 and the pressure valve 32, respectively.
Die Gliederung der vorliegenden Bremsanlage ermöglicht die Verwendung eines bisher schon gebräuchlichen Ventilblocks, in welchem das Trennventil 19, die parallel geschalteten Ventile 26 und 30, die Einlaßventile 15 und 16 mit parallel geschalteten Rückschlagventilen 27 und 28 sowie die Auslaßventile 17 und 18 enthalten sind. Das Schaltventil 20 wird in den Pumpenblock 33 aufgenommen, wo es besonders vorteilhaft mit dem Druckventil 32 zu einer Baueinheit zusammengefaßt werden kann und in das Gehäuse der Pumpe 12 eingesetzt werden kann.The structure of the present brake system enables the use of a previously used valve block, in which the isolating valve 19 , the parallel valves 26 and 30 , the inlet valves 15 and 16 with parallel check valves 27 and 28, and the outlet valves 17 and 18 are contained. The switching valve 20 is received in the pump block 33 , where it can be combined with the pressure valve 32 to form a structural unit and can be inserted into the housing of the pump 12 .
Es ergibt sich folgende Funktionsweise:This results in the following functionality:
Bei einer Normalbremsung, d. h. bei unkritischen Radschlupfwerten, erfolgt die Druckmittelzufuhr zu den Radbremsen vom Hauptbremszylinder 1 durch die Hauptbremsleitung 3 über die Bremszweigleitung 4 zur Radbremse 7 sowie über die Zwischenleitung 6 und die Bremszweigleitung 5 zur Radbremse 8. Der Druckabbau erfolgt auf demselben Wege. Das Sperrventil 21 wird in seine Schaltstellung gebracht und verbleibt dort solange, wie im Hauptbremszylinder 1 Bremsdruck herrscht. With normal braking, ie with non-critical wheel slip values, the pressure medium is supplied to the wheel brakes from the master brake cylinder 1 through the main brake line 3 via the brake branch line 4 to the wheel brake 7 and via the intermediate line 6 and the brake branch line 5 to the wheel brake 8 . The pressure is reduced in the same way. The check valve 21 is brought into its switching position and remains there as long as there is 1 brake pressure in the master brake cylinder.
Bei Erreichen eines kritischen Bremsschlupfes setzt die Bremsschlumpfregelung ein, die in dieser Bremsanlage nach dem bekannten Rückförderprinzip arbeitet. Sobald die Pumpe 12 zu fördern beginnt, wird das Schaltventil 20 in seine Schaltstellung gebracht, so daß die Hauptbremsleitung 3 gesperrt und die Druckleitung 14 freigegeben wird. Dadurch wird die Bremsblende 23 in der Nebenbremsleitung 24 wirksam. Eine Druckmittelzufuhr zu den Einlaßventilen 15 und 16 ist jeweils nur über eine Blende, nämlich die Pumpenblende 22 oder die Bremsblende 23, möglich. Heftige Druckstöße treten nicht mehr auf, so daß die Geräuschentwicklung der Einlaßventile stark gemindert ist.When a critical brake slip is reached, the brake smurf control starts, which works in this brake system according to the known return flow principle. As soon as the pump 12 begins to deliver, the switching valve 20 is brought into its switching position, so that the main brake line 3 is blocked and the pressure line 14 is released. As a result, the brake orifice 23 becomes effective in the secondary brake line 24 . A pressure medium supply to the inlet valves 15 and 16 is only possible via one orifice, namely the pump orifice 22 or the brake orifice 23 . Violent pressure surges no longer occur, so that the noise development of the inlet valves is greatly reduced.
Bei einer Antriebsschlupfregelung bleibt das Sperrventil 21 in seiner geöffneten Grundstellung, da vom Hauptbremszylinder 1 her kein Druck aufgebaut wird. Das Trennventil 19 wird umgeschaltet, so daß die Druckmittelzufuhr von der Pumpe 12 nur zur Radbremse 7 des angetriebenen Rades erfolgt. Dazu wird wieder das Schaltventil 20 vom Pumpendruck in seine Schaltstellung gebracht. Sollte eine plötzliche Pedalbremsung nötig sein, wird die Druckmittelzufuhr wieder über die Bremsblende 23 gelenkt. Der Bremsdruck in der Radbremse 7 wird dabei über das Rückschlagventil 26 aufgebaut. Da das Prinzip der Antriebsschlupfregelung ebenfalls bereits im Stand der Technik beschrieben ist, soll es hier nicht näher erläutert werden. In the case of traction control, the check valve 21 remains in its open basic position, since no pressure is built up from the master brake cylinder 1 . The isolating valve 19 is switched over so that the pressure medium supply from the pump 12 takes place only to the wheel brake 7 of the driven wheel. For this purpose, the switching valve 20 is brought back into its switching position by the pump pressure. Should sudden pedal braking be necessary, the pressure medium supply is again directed via the brake cover 23 . The brake pressure in the wheel brake 7 is built up via the check valve 26 . Since the principle of traction control is also already described in the prior art, it will not be explained in more detail here.
In Fig. 2 ist eine Bremsanlage mit Bremsschlupfregelung, aber ohne Antriebsschlupfregelung dargestellt. Sie bildet ein sogenanntes offenes System, d. h., bei einer Bremsschlupfregelung wird durch die Auslaßventile 117 und 118 das Druckmittel in einen drucklosen Behälter 102 abgelassen, aus welchem die selbstansaugende Pumpe 112 über die Saugleitung 111 das Druckmittel wiederum in die Radbremsen fördert. In Fig. 2 sind alle Funktionselemente gegenüber ihren Entsprechungen aus Fig. 1 mit um Einhundert erhöhten Bezugszeichen versehen.In Fig. 2 is a brake system with brake slip control, but shown without traction control. It forms a so-called open system, that is, in the case of brake slip control, the pressure medium is discharged through the outlet valves 117 and 118 into an unpressurized container 102 , from which the self-priming pump 112 in turn conveys the pressure medium into the wheel brakes via the suction line 111 . In FIG. 2, all functional elements are provided with reference numerals increased by one hundred compared to their counterparts from FIG. 1.
Gegenüber Fig. 1 weist das Schaltventil 120 den Unterschied auf, daß es sich hier um ein 3/2-Wegeventil handelt. Dazu wurde die Pumpenblende 122 oberhalb des Schaltventils 120 angeordnet. Ansonsten ergibt sich in der Funktion des Schaltventils 120 kein Unterschied, da auch hier entweder die Hauptbremsleitung 103 oder die Druckleitung 114 freigegeben wird. Sobald die Pumpe 112 einen Förderdruck in der Druckleitung 114 aufbaut, wird das Schaltventil 120 umgeschaltet, so daß vom Hauptbremszylinder Druckmittel zu den Radbremsen nur über die Bremsblende 123 zugeführt werden kann. Im übrigen ist auch das Prinzip dieser Bremsanlage bekannt, so daß auf eine weitere Beschreibung verzichtet werden kann.Compared to Fig. 1, the switching valve 120 has the difference that it is a 3/2-way valve. For this purpose, the pump orifice 122 was arranged above the switching valve 120 . Otherwise there is no difference in the function of the switching valve 120 , since either the main brake line 103 or the pressure line 114 is released here. As soon as the pump 112 builds up a delivery pressure in the pressure line 114 , the switching valve 120 is switched over so that pressure medium can only be supplied from the master brake cylinder to the wheel brakes via the brake orifice 123 . The principle of this brake system is also known, so that a further description can be dispensed with.
BezugszeichenlisteReference list
1 Hauptbremszylinder
2 Druckmittelbehälter
3 Hauptbremsleitung
4 Bremszweigleitung
5 Bremszweigleitung
6 Zwischenleitung
7 Radbremse
8 Radbremse
9 Rücklaufleitung
10 Niederdruckspeicher
11 ABS-Saugleitung
12 Pumpe
13 ASR-Saugleitung
14 Druckleitung
15 Einlaßventil
16 Einlaßventil
17 Auslaßventil
18 Auslaßventil
19 Trennventil
20 Schaltventil
21 Sperrventil
22 Pumpenblende
23 Bremsblende
24 Nebenbremsleitung
25 Rückschlagventil
26 Rückschlagventil
27 Rückschlagventil
28 Rückschlagventil
29 Vordruckventil
30 Überdruckventil
31 Saugventil
32 Druckventil
33 Pumpenblock
101 Hauptbremszylinder
102 Druckmittelbehälter
103 Hauptbremsleitung
104 Bremszweigleitung
105 Bremszweigleitung
107 Radbremse
108 Radbremse
109 Rücklaufleitung
111 ABS-Saugleitung
112 Pumpe
114 Druckleitung
115 Einlaßventil
116 Einlaßventil
117 Auslaßlventil
118 Auslaßventil
120 Schaltventil
122 Pumpenblende
123 Bremsblende
124 Nebenbremsleitung
125 Rückschlagventil
126 Rückschlagventil
127 Rückschlagventil
128 Rückschlagventil
131 Saugventil
132 Druckventil
133 Pumpenblock 1 master brake cylinder
2 pressure medium tanks
3 main brake line
4 brake branch line
5 brake branch line
6 intermediate line
7 wheel brake
8 wheel brake
9 return line
10 low pressure accumulators
11 ABS suction line
12 pump
13 ASR suction line
14 pressure line
15 inlet valve
16 inlet valve
17 exhaust valve
18 exhaust valve
19 isolation valve
20 switching valve
21 shut-off valve
22 pump cover
23 brake cover
24 auxiliary brake line
25 check valve
26 check valve
27 check valve
28 check valve
29 pre-pressure valve
30 pressure relief valve
31 suction valve
32 pressure valve
33 pump block
101 master brake cylinder
102 pressure medium container
103 Main brake line
104 brake branch line
105 brake branch line
107 wheel brake
108 wheel brake
109 return line
111 ABS suction line
112 pump
114 pressure line
115 inlet valve
116 inlet valve
117 exhaust valve
118 exhaust valve
120 switching valve
122 pump cover
123 brake cover
124 auxiliary brake line
125 check valve
126 check valve
127 check valve
128 check valve
131 suction valve
132 pressure valve
133 pump block
Claims (5)
mit einem Hauptbremszylinder,
mit einer Radbremse, die durch eine Bremsleitung mit dem Hauptbremszylinder und durch eine Rücklaufleitung mit einem Druckmittelreservoir verbunden ist,
mit einem Einlaßventil in der Bremsleitung,
mit einem Auslaßventil in der Rücklaufleitung,
mit einer Pumpe, die während einer Schlupfregelung durch eine Druckleitung Druckmittel in die Bremsleitung zwischen Hauptbremszylinder und Einlaßventil fördert,
dadurch gekennzeichnet, daß in der Druckleitung (14, 114) eine Blende (Pumpenblende 22, 122) angeordnet ist und das bei einer Schlupfregelung eine Druckmittelzufuhr vom Hauptbremszylinder (1) zum Einlaßventil (15, 16; 115, 116) nur durch eine Blende (Bremsblende 23, 123) möglich ist.1. Slip-controlled hydraulic brake system
with a master brake cylinder,
with a wheel brake which is connected to the master brake cylinder by a brake line and to a pressure medium reservoir by a return line,
with an inlet valve in the brake line,
with an outlet valve in the return line,
with a pump that conveys pressure medium into the brake line between the master brake cylinder and the inlet valve during a slip control through a pressure line,
characterized in that an orifice (pump orifice 22, 122 ) is arranged in the pressure line ( 14 , 114 ) and that, in the case of a slip control, a pressure medium supply from the master brake cylinder ( 1 ) to the inlet valve ( 15 , 16 ; 115 , 116 ) only through an orifice ( Brake cover 23, 123 ) is possible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19924220835 DE4220835A1 (en) | 1992-06-25 | 1992-06-25 | Antiskid hydraulic brake control with reduced valve noise - has recirculating pump driving through flow restriction switched by pressure control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19924220835 DE4220835A1 (en) | 1992-06-25 | 1992-06-25 | Antiskid hydraulic brake control with reduced valve noise - has recirculating pump driving through flow restriction switched by pressure control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE4220835A1 true DE4220835A1 (en) | 1994-01-05 |
Family
ID=6461799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19924220835 Ceased DE4220835A1 (en) | 1992-06-25 | 1992-06-25 | Antiskid hydraulic brake control with reduced valve noise - has recirculating pump driving through flow restriction switched by pressure control valve |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE4220835A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4438927A1 (en) * | 1994-10-31 | 1996-05-02 | Teves Gmbh Alfred | Hydraulic brake system for driving stability control |
| US5984430A (en) * | 1996-02-21 | 1999-11-16 | Aisin Seiki Kabushiki Kaisha | Hydraulic braking system for a vehicle |
| EP1081007A2 (en) * | 1999-08-23 | 2001-03-07 | Mando Corporation | Brake pressure control device for vehicle |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3914953A1 (en) * | 1989-05-06 | 1990-11-08 | Teves Gmbh Alfred | Controlled-slip braking system esp. for motor vehicle |
| DE4004316A1 (en) * | 1989-08-09 | 1991-02-14 | Bosch Gmbh Robert | HYDRAULIC VEHICLE BRAKE SYSTEM WITH ANTI-BLOCKING DEVICE |
| DE4015745A1 (en) * | 1989-10-06 | 1991-04-18 | Teves Gmbh Alfred | BLOCK-PROTECTED, HYDRAULIC BRAKE SYSTEM |
| DE4003607A1 (en) * | 1990-02-07 | 1991-08-08 | Bosch Gmbh Robert | HYDRAULIC BRAKE SYSTEM FOR VEHICLES |
| DE4016755A1 (en) * | 1990-05-25 | 1991-11-28 | Teves Gmbh Alfred | Control valve for antilock vehicle brakes - has hydraulic controlled pressure regulator and hydraulic inlet valve |
| DE4023707A1 (en) * | 1990-05-16 | 1992-01-30 | Teves Gmbh Alfred | Hydraulic antilock braking system - has pressure limiting valve cooperating with construction between brake and return line as constant flow supply to wheel brake |
| DE4037486A1 (en) * | 1990-11-24 | 1992-05-27 | Bosch Gmbh Robert | Vehicular hydraulic braking system with low-noise antilock operation - incorporates motorised pump with return line opened by hydraulic valve for fluid pressure peak smoothing |
| DE4119662A1 (en) * | 1991-06-14 | 1992-12-17 | Bosch Gmbh Robert | HYDRAULIC BRAKE SYSTEM WITH ANTI-BLOCKING PROTECTION AND DRIVE-SLIP CONTROL DEVICE, ESPECIALLY FOR MOTOR VEHICLES |
| DE4121603A1 (en) * | 1991-06-29 | 1993-01-07 | Bosch Gmbh Robert | HYDRAULIC BRAKE SYSTEM WITH ANTI-BLOCK PROTECTION CONTROL DEVICE, ESPECIALLY FOR MOTOR VEHICLES |
-
1992
- 1992-06-25 DE DE19924220835 patent/DE4220835A1/en not_active Ceased
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3914953A1 (en) * | 1989-05-06 | 1990-11-08 | Teves Gmbh Alfred | Controlled-slip braking system esp. for motor vehicle |
| DE4004316A1 (en) * | 1989-08-09 | 1991-02-14 | Bosch Gmbh Robert | HYDRAULIC VEHICLE BRAKE SYSTEM WITH ANTI-BLOCKING DEVICE |
| DE4015745A1 (en) * | 1989-10-06 | 1991-04-18 | Teves Gmbh Alfred | BLOCK-PROTECTED, HYDRAULIC BRAKE SYSTEM |
| DE4003607A1 (en) * | 1990-02-07 | 1991-08-08 | Bosch Gmbh Robert | HYDRAULIC BRAKE SYSTEM FOR VEHICLES |
| DE4023707A1 (en) * | 1990-05-16 | 1992-01-30 | Teves Gmbh Alfred | Hydraulic antilock braking system - has pressure limiting valve cooperating with construction between brake and return line as constant flow supply to wheel brake |
| DE4016755A1 (en) * | 1990-05-25 | 1991-11-28 | Teves Gmbh Alfred | Control valve for antilock vehicle brakes - has hydraulic controlled pressure regulator and hydraulic inlet valve |
| DE4037486A1 (en) * | 1990-11-24 | 1992-05-27 | Bosch Gmbh Robert | Vehicular hydraulic braking system with low-noise antilock operation - incorporates motorised pump with return line opened by hydraulic valve for fluid pressure peak smoothing |
| DE4119662A1 (en) * | 1991-06-14 | 1992-12-17 | Bosch Gmbh Robert | HYDRAULIC BRAKE SYSTEM WITH ANTI-BLOCKING PROTECTION AND DRIVE-SLIP CONTROL DEVICE, ESPECIALLY FOR MOTOR VEHICLES |
| DE4121603A1 (en) * | 1991-06-29 | 1993-01-07 | Bosch Gmbh Robert | HYDRAULIC BRAKE SYSTEM WITH ANTI-BLOCK PROTECTION CONTROL DEVICE, ESPECIALLY FOR MOTOR VEHICLES |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4438927A1 (en) * | 1994-10-31 | 1996-05-02 | Teves Gmbh Alfred | Hydraulic brake system for driving stability control |
| US5984430A (en) * | 1996-02-21 | 1999-11-16 | Aisin Seiki Kabushiki Kaisha | Hydraulic braking system for a vehicle |
| DE19706765C2 (en) * | 1996-02-21 | 2003-02-13 | Aisin Seiki | Hydraulic motor vehicle braking system |
| EP1081007A2 (en) * | 1999-08-23 | 2001-03-07 | Mando Corporation | Brake pressure control device for vehicle |
| EP1081007A3 (en) * | 1999-08-23 | 2003-06-18 | Mando Corporation | Brake pressure control device for vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
| 8110 | Request for examination paragraph 44 | ||
| 8125 | Change of the main classification |
Ipc: B60T 8/48 |
|
| 8127 | New person/name/address of the applicant |
Owner name: CONTINENTAL TEVES AG & CO. OHG, 60488 FRANKFURT, D |
|
| 8131 | Rejection |