DE1751956B2 - Control valve for a braking force control system of a vehicle - Google Patents
Control valve for a braking force control system of a vehicleInfo
- Publication number
- DE1751956B2 DE1751956B2 DE19631751956 DE1751956A DE1751956B2 DE 1751956 B2 DE1751956 B2 DE 1751956B2 DE 19631751956 DE19631751956 DE 19631751956 DE 1751956 A DE1751956 A DE 1751956A DE 1751956 B2 DE1751956 B2 DE 1751956B2
- Authority
- DE
- Germany
- Prior art keywords
- valve member
- pressure
- control valve
- control
- seat
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
- B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
- B60T8/362—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in pneumatic systems
- B60T8/3625—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in pneumatic systems having at least one vacuum connection
-
- 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
- B60T13/24—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 gaseous
- B60T13/241—Differential pressure 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
- 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
- B60T8/448—Reducing the boost of the power-assist booster means to reduce brake pressure the power-assist booster means being a vacuum or compressed air booster
-
- 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
- B60T8/72—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 responsive to a difference between a speed condition, e.g. deceleration, and a fixed reference
- B60T8/74—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 responsive to a difference between a speed condition, e.g. deceleration, and a fixed reference sensing a rate of change of velocity
Description
Die Erfindung betrifft ein Steuerventil mit einem schwimmend gelagerten, durch eine Feder in Offenstellung vorgespannten, durch ein von einer Antiblockiervorrichtung ausgehendes Steuersignal in Schließstellung bewegbaren Ventilgüed zum Steuern des Druckverhältnisses zwischen den Drücken in zwei Kammern eines Druckmittelzylinders, einer mit Druckmittel arbeitenden Fahrzeugbremsanlage, dessen Kolben mit einem Betätigungsorgan gekoppelt ist.The invention relates to a control valve with a floating, by a spring in the open position biased by a control signal emanating from an anti-lock device in the closed position movable valve guide for controlling the pressure ratio between the pressures in two chambers a pressure fluid cylinder, a vehicle brake system that works with pressure fluid, the pistons of which with is coupled to an actuator.
Bei einer Antiblockiereinrichtung einer Bremsanlage für Kraftfahrzeuge ist ein Steuerventil der angegebenen Art bekannt (DT-AS 10 63 465). Dieses bekannte Steuerventil führt die Bremsflüssigkeit normalerweise den Bremsen und bei übermäßiger Verzögerung dem Druckmittelzylinder zu, wodurch der Fahrer über das Arbeiten der Anlage unterrichtet wird.In the case of an anti-lock device of a brake system for motor vehicles, a control valve is as specified Type known (DT-AS 10 63 465). This known control valve normally guides the brake fluid the brakes and, in the event of excessive deceleration, the pressure cylinder, whereby the driver has the Work of the plant is instructed.
Mit der Erfindung soll ein Steuerventil geschaffen werden, das ebenfalls in Abhängigkeit von einem durch eine Antiblockiereinrichtung abgegebenen Steuersignal die Betätigung der Fahrzeugbremsen hemmt.With the invention, a control valve is to be created, which is also dependent on a through a control signal emitted by an anti-lock device inhibits the actuation of the vehicle brakes.
Zur Lösung dieser Aufgabe ist gemäß der Erfindung vorgesehen, daß das erste Ventilgüed mittels einer inneren und einer äußeren bewegbaren Wand schwimmend gelagert ist und bei Betätigung durch das Steuersignal mit einem gegen einen Sitz des Gehäuses vorgespannten zweiten Ventilglied zusammenwirken kann und daß eine Verbindung zwischen zwei Räumen vorgesehen ist, von denen der erste zwischen den bewegbaren Wänden eingeschlossen ist und mit der ersten Kammer in Verbindung steht und der zweite zwischen der inneren bewegbaren Wand und dem Sitz gebildet ist und mit der zweiten Kammer in Verbindung steht, derart, daß durch Betätigen des ersten Ventilglieds zunächst die Verbindung unterbrechbar und dann das zweite Ventilgüed von seinem Sitz abhebbar ist, so daß Druckmittel anderen Druckes in den zweiten Raum strömen kann.To solve this problem it is provided according to the invention that the first Ventilgüed by means of an inner and an outer movable wall is floating and when actuated by the control signal can cooperate with a second valve member biased against a seat of the housing and that a connection is provided between two spaces, the first of which is between the movable ones Walls is enclosed and is in communication with the first chamber and the second between the inner movable wall and the seat is formed and communicates with the second chamber, such that by actuating the first valve member first the connection can be interrupted and then the second Ventilgüed can be lifted from its seat, so that pressure medium of different pressure in the second space can flow.
Mit der Erfindung ist ein sehr einfaches Steuerventil geschaffen, das beim Arbeiten der Antiblockiereinrichtung eine der Betätigungskraft des Fahrers entgegenwirkende Kraft am Betätigungsorgan, z. B. dem Bremspedal, erzeugt. Dadurch wird der Fahrer unterrichtet, wenn die Antiblockiereinrichtung einen Blockierzustand eines Rades feststellt. Die das Steuerventil und den Druckmittelzylinder umfassende Anlage kann dabei völlig unabhängig von dem eigentlichen Bremskreis betrieben werden. Zum Beispiel kann sie mit von der Antriebsmaschine des Kraftfahrzeuges abgeleiteten Unterdruck betrieben werden, während die Bremse üblicherweise in einen hydraulischen Bremskreis eingeschaltet ist.With the invention, a very simple control valve is created that when the anti-lock device is working a force on the actuator that counteracts the actuation force of the driver, e.g. B. the brake pedal, generated. This informs the driver when the anti-lock device is locked of a wheel. The system comprising the control valve and the pressure medium cylinder can thereby operated completely independently of the actual brake circuit. For example, she can use the Drive machine of the motor vehicle derived negative pressure are operated while the brake is usually switched on in a hydraulic brake circuit.
Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Advantageous refinements of the invention are characterized in the subclaims.
Die Erfindung ist im folgenden an Hand schematischer Zeichnungen eines Ausführungsbeispiels näher erläutert. DieThe invention is described in more detail below with reference to schematic drawings of an exemplary embodiment explained. the
F i g. 1 und 2 zeigen im Schnitt ein Steuerventil mit einem daran angeschlossenen Druckmittelzylinder in unbetätigter und in betätigter Stellung.F i g. 1 and 2 show in section a control valve with a pressure medium cylinder connected to it in FIG unactuated and in the actuated position.
In einem Druckmittelzylinder 44 (F i g. 1 und 2) spielt ein Kolben 62. Die eine Kammer des Druckmittelzylinders 44 ist durch eine Leitung 45 mit einer Unterdruckquelle verbunden.Plays in a pressure cylinder 44 (FIGS. 1 and 2) a piston 62. The one chamber of the pressure medium cylinder 44 is through a line 45 with a vacuum source tied together.
Beide Kammern des Zylinders sind über je eine Leitung 46 und 47 mit dem Gehäuse 48 eines Steuerventils verbunden. Ein Ende des Gehäuses 48 ist über öffnungen 49 mit der Atmosphäre verbunden, während das andere, von einer Stirnwand gebildete Ende einen Kanal 5t für die Zufuhr von Steuerluft aufweist, die z. B. von einer bekannten Antiblockiereinrichtung einerBoth chambers of the cylinder are connected to the housing 48 of a control valve via a line 46 and 47 each tied together. One end of the housing 48 is connected to the atmosphere via openings 49, while the other end formed by an end wall has a channel 5t for the supply of control air, which z. B. from a known anti-lock device one
Kraftfahrzeug-Bremsanlage geliefert wird. Ein tellerförmiges Ventilglied 52 ist durch eine Feder 53 gegen einen ringförmigen Sitz 54 des Gehäuses 48 vorgespannt, so daß es normalerweise die Verbindung zwischen der Leitung 46 und der Atmosphäre verschlossen hält. Im Gehäuse 48 ist ein Ventilglied in Gestalt eines Bechers 55 mittels zweier in einem Absand voneinander angeordneter Membranen 56 und 57 schwimmend gelagert. Die Leitung 47 ist mit dem Raum zwischen diesen Membranen verbunden. Eine Bohrung 58 im Boden des Bechers 55 verbindet den Raum zwischen den Membranen 56 und 57 mit dem Raum zwischen der äußeren Membran 57 und der Stirnwand des Gehäuses 48. Der Becher 55 wird von einer Feder 59 normalerweise in der in Fig. 1 gezeigten Stellung gehalten, in der er sich in einem Abstand von dem tellerförmigen Ventilglied 52 befindet. In der Wand des Bechers 55 ist im Bereich zwischen den Membranen 56 und 57 eine Bohrung 61 vorgesehen, so daß die Leitungen 46 und 47 bei der Stellung des Bechers 55, 54 nach F i g. 1 miteinander in Verbindung stehen und in be:den Kammern des Zylinders 44 Unterdruck herrscht.Motor vehicle brake system is supplied. A plate-shaped valve member 52 is biased by a spring 53 against an annular seat 54 of the housing 48 so that it normally keeps the connection between the line 46 and the atmosphere closed. In the housing 48, a valve member in the form of a cup 55 is mounted in a floating manner by means of two membranes 56 and 57 arranged in sand from one another. The line 47 is connected to the space between these membranes. A bore 58 in the bottom of the cup 55 connects the space between the diaphragms 56 and 57 with the space between the outer diaphragm 57 and the end wall of the housing 48. The cup 55 is normally held in the position shown in FIG. 1 by a spring 59 , in which it is at a distance from the plate-shaped valve member 52. In the wall of the cup 55, a bore 61 is provided in the area between the membranes 56 and 57, so that the lines 46 and 47 in the position of the cup 55, 54 according to FIG. 1 are in communication with each other and in be : the chambers of the cylinder 44 negative pressure prevails.
Wenn dem Steuerventil über den Kanal 51 Steuerluft zugeführt wird, bewegt sich der Becher 55 nach links und legt sich gegen den Boden des tellerförmigen Ventilgliedes 52 an, um zuerst die Verbindung zwischen der Leitung 46 und der Unterdruckquelle zu unterbrechen und dann das Ventilglied 52 von seinem Sitz abzuheben, so daß die Leitung '-16 mit der Atmosphäre verbunden wird. Jetzt tritt Luft unter Atmosphärendruck in die linke Kammer des Druckmittelzylinders 44 ein, sü daß der Kolben 62 nach rechts bewegt wird.When control air is supplied to the control valve via duct 51, cup 55 moves to the left and rests against the bottom of the plate-shaped valve member 52 to first establish the connection between the To interrupt line 46 and the vacuum source and then lift the valve member 52 from its seat, so that the line '-16 is connected to the atmosphere will. Now air under atmospheric pressure enters the left chamber of the pressure cylinder 44, see below that the piston 62 is moved to the right.
Verwendet man das beschriebene Ventil in Verbindung mit einer Antiblockiereinrichtung zum Verhindern des Blockierens gebremster Räder eines Kraftfahrzeuges, so kann die Steuerluftzufuhr zu dem Steuerventil zunächst derart verringert werden, daß das Ventilglied 52 zwar zur Anlage an seinem Sitz kommt, um die Zufuhr von Luft unter Atmosphärendruck zum Druckmittelzylinder 44 zu unterbrechen, der Becher 55 jedoch in Anlage an dem Ventilglied 52 bleibt, so daß der Kolben 62 des Druckmittelzylinders 44 erst zurückkehrt, wenn die Steuerlufizufuhr vollständig eingestellt wird.If the valve described is used in conjunction with an anti-blocking device to prevent it the locking of braked wheels of a motor vehicle, the control air supply to the Control valve are initially reduced in such a way that the valve member 52 admittedly to rest on its seat comes to interrupt the supply of air under atmospheric pressure to the pressure medium cylinder 44, the Cup 55, however, remains in contact with the valve member 52, so that the piston 62 of the pressure medium cylinder 44 does not return until the control air supply is completely stopped.
Der Kolben 62 kann direkt auf das Bremspedal 63 eines Kraftfahrzeugs wirken, um es gegen seine Ruhestellung zu bewegen, wie es in F i g. 1 und 2 gezeigt ist. Er kann aber auch auf den Kolben eines Hauptbremszylinders wirken, oder er kann lediglich das Volumen eines Teils einer hydraulischen Übertragungsleitung zwischen dem Hauptzylinder und dem Radzylinder einer Kraftfahrzeugbremse vergrößern.The piston 62 can act directly on the brake pedal 63 of a motor vehicle in order to move it towards its rest position, as shown in FIG. 1 and 2 is shown. However, it can also act on the piston of a master brake cylinder, or it can only increase the volume of part of a hydraulic transmission line between the master cylinder and the wheel cylinder of a motor vehicle brake.
Hierzu 2 Blatt ZeichnungenFor this purpose 2 sheets of drawings
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3667262A GB1042772A (en) | 1962-09-27 | 1962-09-27 | Anti-skid device for vehicles |
GB3667262 | 1962-09-27 |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1751956A1 DE1751956A1 (en) | 1972-03-09 |
DE1751956B2 true DE1751956B2 (en) | 1975-06-05 |
DE1751956C3 DE1751956C3 (en) | 1976-01-29 |
Family
ID=
Also Published As
Publication number | Publication date |
---|---|
DE1751956A1 (en) | 1972-03-09 |
GB1042773A (en) | 1966-09-14 |
GB1042772A (en) | 1966-09-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) | ||
E77 | Valid patent as to the heymanns-index 1977 | ||
EHJ | Ceased/non-payment of the annual fee |