Device for the open-loop and / or closed-loop control of a fluid pressure, braking system and vehicle

Abstract

The invention relates to a device (100) for the open-loop and / or closed-loop control of a fluid pressure in a braking system and / or a vehicle, wherein the relief element (105) is arranged within the housing element (102) so as to be movable in such a way that a fluid connection between the supply connection (A), the pressure-control connection (B) and / or the output connection (C) can be controlled in an open loop and / or a closed loop manner so that a specifiable target value of the pressurized fluid can be set at the pressure-control connection (A), wherein the primary tensioning element (104) is arranged between the transfer element (103) and the relief element (105) so that a tensioning force can be exerted onto the relief element (105) via the primary tensioning element (104), which tensioning force preferably counteracts the fluid pressure at the pressure-control connection (A), wherein the transfer element (103) is movable in order to set a tensioning force of the primary tensioning element (104), and wherein the transfer element (103) is self-locking. The present invention also relates to a braking system and to a vehicle.

Description

[0001] DESCRIPTION

[0002] Device for controlling and / or regulating a fluid pressure, braking system and vehicle

[0003] The present invention relates to a device, in particular a pressure control device, for controlling and / or regulating a fluid pressure in a braking system and / or a vehicle, in particular a rail vehicle. Furthermore, the present invention relates to a braking system with such a device and to such a vehicle.

[0004] In the railway industry, pneumatic systems are commonly used to control multiple subsystems, such as brake actuators, doors, and pantographs.

[0005] In a pneumatic system, air is pressurized as a pressurized fluid by a compressor in a reservoir and transported through a complex piping system to various control elements connected to the respective actuators. Alternatively, in hydraulic systems, pressure is built up within the oil as a pressurized fluid using pumps.

[0006] Typically, such control elements are used to regulate fluid pressure. The control elements can be designed as proportional valves, pressure relief valves, and / or relay valves, for example.

[0007] The pressure regulators can be adjusted manually to a specific setpoint using a screw. Control valves such as proportional valves typically have two states when switched off: normally open or normally closed.

[0008] However, the problem remains of maintaining a set pressure even in the event of a power failure or in the event of the control elements or control valves being de-energized. The object of the present invention is to provide a device that enables simple and reliable pressure control by independently maintaining or maintaining a set pressure control, in particular by designing the device in a preferably passive form. Furthermore, the object of the present invention is to provide a braking system with such a device and a vehicle.

[0009] This object is achieved according to the invention by a device according to independent claim 1, with respect to a braking system by the subject matter according to claim 11 and with respect to a vehicle by the subject matter according to claim 12. Preferred embodiments are specified in the dependent claims.

[0010] According to the present invention, a device, in particular a pressure control device, for controlling and / or regulating a fluid pressure in a braking system and / or a vehicle, in particular a rail vehicle, is provided with at least one housing element, at least one relief element, at least one transfer element, and at least one primary tensioning element, wherein the at least one housing element has at least one supply connection, at least one pressure control connection, and at least one (pressure fluid) output connection. The relief element is movably arranged within the housing element such that a fluid connection between the supply connection, the pressure control connection, and / or the output connection can be controlled and / or regulated, so that a predeterminable target value of the pressure fluid can be set at the pressure control connection.The primary tensioning element is arranged between the transfer element and the relief element such that a tensioning force can be exerted on the relief element via the primary tensioning element, which preferably counteracts the fluid pressure at the pressure control connection, wherein the transfer element is movable for adjusting a tensioning force of the primary tensioning element as required and wherein the transfer element is designed to be self-locking. The invention is based on the basic idea that the device according to the invention is designed as a controllable pressure regulator which maintains or can maintain the currently set pressure in the event of electrical de-energization. In particular, it can be provided to use the device in various subsystems of rail vehicles, wherein the pressure can be controlled or regulated to different levels, but the set pressure is to be maintained in the event of a power cut.

[0011] Here, the invention proposes that, for example, an electric motor can act as a drive element to drive a transfer element, wherein the transfer element can preferably convert a rotary drive movement into a linear or translational actuating movement. This resulting linear or translational actuating movement of the transfer element can press or work against a primary clamping element and introduce a (pre-)tension into this primary clamping element.

[0012] The primary clamping element can be coupled to a pneumatic mechanism and compress it or transmit or exert a tension or a force on the pneumatic control mechanism of the device.

[0013] The pneumatic (control-Zregulating) mechanism, in particular the operative connection between the relief element and the ring element for controlling or regulating a fluid connection between the supply connection, the pressure control connection andZor the output connection, can release or vent or reduce the fluid pressure above a predeterminable setpoint, build up a fluid pressure below the predeterminable setpoint andZor maintain the fluid pressure when a predeterminable setpoint is reached.

[0014] For the purposes of the present invention, a (pressure fluid) output port can be understood as, for example, a vent port, a pressure fluid outlet to the atmosphere, a pressure fluid outlet to a fluid reservoir, or the like, in particular so that a required reduction in the fluid pressure can be controlled and / or regulated via this (pressure fluid) output port. For the purposes of the present invention, the (pressure fluid) output port is also referred to as the output port.

[0015] The transfer mechanism or transfer element, which converts the rotation into a linear or translational movement, is designed to be self-locking. This allows a set tension or preload of the primary clamping element, a set pressure, or a set fluid pressure, to be maintained even if the electrical power supply is shut off or interrupted.

[0016] Preferably, within the meaning of the present invention, it can be provided that the device is used for providing and controlling or regulating a (service brake pressure) and / or an emergency brake pressure. Thus, an (emergency) brake pressure for a brake system, in particular for at least one brake unit of a brake system, can be provided at the pressure control connection.

[0017] According to a preferred embodiment, the fluid connection between the supply connection, the pressure control connection and / or the output connection is controllable and / or regulatable in such a way that a fluid pressure above a predeterminable setpoint value can be vented or reduced or discharged via the output connection, a fluid pressure below the predeterminable setpoint value can be built up or increased by means of a fluid connection between the pressure control connection and the supply connection, and a fluid pressure at the pressure control connection which is at least substantially equal to the predeterminable setpoint value can be maintained or at least substantially maintained.

[0018] Accordingly, comprehensive or targeted control and / or regulation of the fluid pressure at the pressure control port can be provided. In particular, the fluid pressure can be adjusted or adapted to various setpoints as needed.

[0019] For the purposes of the present invention, the fluid pressures below, above, and substantially equal to the setpoint can be understood as pressure ranges that merge into one another. Thus, a fluid pressure equal to the setpoint can be understood as substantially equal to or within the range of the setpoint, while a fluid pressure above or below the setpoint can be understood as substantially above or below the setpoint.

[0020] According to a further preferred embodiment, the device has at least one secondary clamping element and one ring element, in particular a piston ring element, wherein the secondary clamping element is arranged in such a way, in particular arranged between the housing element and the ring element, that a (pre-)clamping force can be exerted on the ring element by the secondary clamping element, and wherein the relief element and the ring element can be brought into operative connection or contact with one another directly or indirectly in such a way that the fluid connection between the supply connection, the pressure control connection and / or the output connection can be controlled and / or regulated.

[0021] In particular, the primary clamping element and the secondary clamping element can be arranged or aligned such that the relief element and the ring element can be brought into operative connection with one another, in particular when there is no fluid pressure in the device or the supply connection and the pressure control connection of the device are unloaded or vented.

[0022] By means of the primary clamping element and the secondary clamping element, the (pressure) conditions under which pressure build-up or venting, pressure reduction or fluid pressure reduction or venting, or the maintenance of a fluid pressure at the pressure control connection can occur can be preset, wherein the exerted (pre-)tension of the primary clamping element can be set or adjusted by means of the transfer element. While the primary clamping element can be adapted in its (pre-)tension via the movable or adjustable transfer element, the secondary clamping element can preferably be provided in a non-adjustable arrangement within the device according to the invention. Thus, the (pre-)tension of the secondary clamping element can be provided as non-adjustable in order to apply a specific tension to the ring element.

[0023] In particular, by means of an interaction of the relief element with the ring element, in combination with the primary and secondary clamping element, the fluid connections between the pressure control connection, the supply connection and / or the output connection can be controlled or regulated depending on the respective fluid pressures within the device or within the housing element.

[0024] According to one embodiment, the primary clamping element and / or the secondary clamping element is designed as a compressible clamping element, in particular as a spring element, for providing a pre-tensioning force, wherein the primary clamping element can be pre-tensioned as required by means of the transfer element.

[0025] By making the primary clamping element and / or the secondary clamping element compressible, the fluid pressure at the pressure control port of the device can be conveniently controlled and / or regulated.

[0026] According to one embodiment, the at least one transfer element is designed in the form of a screw connection or is provided for forming a screw connection. In a further preferred embodiment, the device comprises a drive unit, in particular an electric motor, for preferably rotary driving of the transfer element, so that the transfer element can be moved in a preferably translational direction to adjust a (pre-)tensioning force of the primary tensioning element. Preferably, the transfer element is provided for expediently forming a screw connection or thread pairing or thread guide with, for example, the housing element of the device.

[0027] In particular, the device can have an internal thread into which the transfer element can engage with a corresponding external thread in order to convert a rotary drive movement of the drive unit into a translatory actuating movement, so that the primary clamping element can be preset or (pre-)tensioned.

[0028] Accordingly, the transfer element can convert a rotary (drive) movement of the transfer element into a translatory adjustment movement of the transfer element in order to enable an adjustment or pre-setting of the primary clamping element, in operative connection with the relief element.

[0029] According to a further preferred embodiment, the fluid pressure at the pressure control connection can be controlled and / or regulated proportionally to a setting position of the drive element, wherein the drive element preferably has a limited, in particular a mechanically limited, setting range.

[0030] In this way, a targeted presetting of the device, in particular of the primary clamping element in operative connection with the relief element, is possible in order to be able to provide or control and / or regulate a specific setpoint for the fluid pressure at the pressure control connection.

[0031] According to a further embodiment, the device comprises a control unit for controlling and / or regulating the drive unit. The device is preferably further configured with a pressure sensor on and / or in a fluid pressure region of the pressure control connection and / or with a position sensor on the drive unit, so that the drive unit can be controlled and / or regulated by the control unit, preferably based on pressure signals and / or position signals. In this way, a targeted control or regulation of the device, in particular of the transfer element, can be achieved in operative connection with the primary clamping element and the relief element.

[0032] For example, only a position of the drive unit can be detected in order to be able to set a specific fluid pressure at the pressure control connection according to a predeterminable setpoint.

[0033] Furthermore, the fluid pressure at or in the pressure control connection or in a pressure range of the pressure control connection can be detected by means of a pressure sensor and used to control or regulate the device.

[0034] In a further embodiment, the relief element is designed as a piston element, as a membrane element or as a piston-membrane element.

[0035] In particular, various designs of the relief element are possible in order to enable specific control or regulation of the fluid pressure at the pressure control connection.

[0036] Thus, the relief element can also be provided as a combined piston-diaphragm element, wherein a preferably shape-supporting piston with a circumferential membrane for radial sealing can be provided within the device.

[0037] Furthermore, the relief element can be provided in the form of a piston element with a circumferential seal, in the form of an O-ring or the like.

[0038] According to a preferred embodiment, the device has at least one pilot pressure unit, so that a pilot pressure for the (pre-)control and / or (pre-)regulation of the relief element can be set, in particular a pilot pressure can be applied or applied as a counterforce to the primary tensioning element and / or the secondary tensioning element, wherein preferably - the pilot pressure unit is designed with at least one first actuating magnet and at least one second actuating magnet, which are arranged along a pilot section of the relief element in such a way that the relief element can be moved, in particular can be moved translationally, depending on an excitation of the first actuating magnet and / or the second actuating magnet;

[0039] - the housing element has a first pilot pressure connection and a second pilot pressure connection for forming a pilot pressure chamber of the pilot pressure unit, so that a pilot pressure can be provided along the pilot section of the relief element within the pilot pressure chamber, in particular on one side of opposite sides of the pilot section, so that the relief element is movable, in particular translationally movable; and / or

[0040] - the housing element has a pilot pressure chamber with the relief element arranged therein, wherein the primary pilot pressure connection and the secondary pilot pressure connection are provided on opposite sides of the relief element such that a movement of the relief element in the pilot pressure chamber can be controlled and / or regulated via the primary and secondary pilot pressure connections, for controlling and / or regulating a fluid connection between the pressure control connection, the supply connection and / or the output connection.

[0041] In particular, the at least one pilot pressure unit can be designed such that it can act, for example, on the relief element, preferably a pilot section of the relief element, with an adjustable or predeterminable pilot pressure and / or on the ring element.

[0042] In this way, the setting of a fluid connection between the pressure control port, the supply port, and / or the output port can be preset or specifically influenced, in addition to or supplementing the setting or control of the transfer element for (pre-)tensioning the primary clamping element. The pilot pressure unit can therefore also allow for short-term adjustment or readjustment of the device, whereby the existing setting of the transfer element or the primary clamping element can remain constant or be maintained.

[0043] The control or regulation of the device according to the invention by means of a pilot pressure unit can be understood as an active control and / or regulation. In contrast, the control and / or regulation of the device according to the invention exclusively by means of the movable transfer element for (pre-)tensioning the primary tensioning element, i.e., without the use of a pilot pressure unit, can be understood as a passive control and / or regulation depending on the respective pressure conditions along the pressure control connection, the supply connection, and / or the output connection.

[0044] According to a secondary aspect of the invention, a braking system is provided with at least one device according to the invention, wherein a (service) braking pressure and / or an emergency braking pressure for at least one braking unit can be provided via the pressure control connection.

[0045] Furthermore, according to a further subordinate aspect of the invention, a vehicle, in particular a rail vehicle, is provided with a device according to the invention and / or a braking system according to the invention.

[0046] All advantages and technical effects achievable in connection with the device according to the invention can also apply individually or in combination to the braking system according to the invention and to the vehicle according to the invention.

[0047] Further details and advantages of the invention will now be explained in more detail with reference to the embodiments shown in the drawings.

[0048] Shown are: Fig. 1 schematic sectional view of the device according to a first embodiment with a control unit;

[0049] Fig. 2 schematic sectional view of the device according to a first embodiment of Fig. 1 in a further setting position;

[0050] Fig. 3 schematic sectional view of the device according to a first embodiment of Fig. 1 in a further setting position;

[0051] Fig. 4 schematic sectional view of the device according to a first embodiment of Fig. 1 in a further setting position;

[0052] Fig. 5 schematic illustration of the correlation between a pressure at the pressure control port and the setting position of the drive unit;

[0053] Fig. 6 schematic sectional view of the device according to a second embodiment;

[0054] Fig. 7 schematic illustration of the controllability according to the second embodiment of Fig. 6 (left) and in the case of a current-free switching or electrical de-energization of the device (right);

[0055] Fig. 8 schematic sectional view of the device according to a third embodiment; and

[0056] Fig. 9 schematic sectional view of the device according to a fourth embodiment.

[0057] Fig. 1 shows a schematic sectional view of the device 100 according to a first embodiment with a control unit 202. The device 100 is provided with a housing element 102 to which a drive unit 101 can be coupled.

[0058] The housing element 102 has a pressure control connection A, a supply connection B and an output connection C, preferably a vent connection C.

[0059] Within the housing element 102, a transfer element 103, a primary clamping element 104 and a relief element or a relief piston element 105 are provided, in particular in operative connection with one another, in particular indirectly or directly in contact with one another.

[0060] The relief element 105 may have a circumferential seal, e.g. in the form of an O-ring, in order to provide a fluid-tight sliding connection with or a seal against the circumferential inner wall of the housing element 102.

[0061] Furthermore, a ring element 108 is provided in combination with a secondary clamping element 107, wherein the secondary clamping element 107 is arranged between the ring element 108 and the housing element 102.

[0062] In particular, the ring element 108 and the secondary clamping element 107 can each be supported against an inner side of the housing element 102 and can be arranged coaxially to the output connection C.

[0063] The ring element 108 can be provided to separate the supply connection B and / or the output connection C from the pressure control connection A in a fluid-tight manner.

[0064] In particular, the separation of the output connection C from the pressure control connection A can be provided in operative connection or in indirect or direct contact of the ring element 108 with the relief element 105, wherein, according to Fig. 1, the opposite end faces of the relief element 105 and the ring element 108 can each (directly) abut one another or can abut one another (indirectly) via a sealing element or a disc seal 106.

[0065] The ring element 108 and / or the housing element 102 can be provided with one or more sealing elements 122; 123 to enable a fluid-tight separation of the output connection C and / or the supply connection B as required.

[0066] By means of the ring element 108 and the relief element 105, optionally with the associated sealing elements 106; 122; 123, a fluid-tight separation can be provided between the pressure control connection A, the supply connection B and / or the output connection C, depending on the pressure conditions in individual pressure areas of the device, if required.

[0067] Furthermore, a pressure sensor can be provided in the housing element 102 along a pressure range of the pressure control connection A. In addition, the drive unit 101 can be configured with a motor unit M, for example, an electric motor, and / or have a position sensor.

[0068] The device can also be designed with a motor driver 201 in addition to the control unit 202.

[0069] In this sense, pressure sensor signals 302 as well as a predeterminable (pressure setpoint 304) for a fluid pressure can be fed to the control unit 202 in order to determine a position setpoint 308 and to pass it on to the motor driver 201.

[0070] The motor driver 201 can carry out or exercise a corresponding control and / or regulation of the drive unit 101 by means of the position setpoint 308 and a position signal 306, which can be provided by the drive unit 101 or the motor unit M or an associated position sensor.

[0071] The further functionality of the device 100 according to the first embodiment is as follows: The drive unit 101 or the motor unit 101 drives the transfer element 103, preferably in the form of a screw or a screw connection. The rotary drive movement of the drive unit 101 can be converted into a linear or translational movement by means of the transfer element 103, wherein, in particular, the transfer element 103 can be adjusted in a translational or axial direction based on a rotary movement along a threaded connection.

[0072] When the transfer element or screw connection 103 compresses the primary clamping element 104, the primary clamping element 104 loads the relief piston 105 with a (pre-)clamping force.

[0073] The (fluid) pressure to be regulated is connected to the pressure control port A, whereby the supply pressure is connected to the supply port B and a fluid pressure reduction, in particular a venting, for example to the atmosphere, can take place via the output port C.

[0074] According to Fig. 1, the disc seal 106 is pressed between the relief element 105 and the ring element 108 in order to prevent pressure fluid from escaping via the output port C.

[0075] The secondary clamping element 107 pre-tensions the ring element 108 and the sealing element or O-ring 122 against an inner side of the housing element 102 and prevents pressure fluid from the supply port B from reaching the pressure area at or around the pressure control port A.

[0076] The sealing elements 122; 123 also prevent the transfer of pressure fluid.

[0077] Accordingly, Fig. 1 shows the device 100 in a pressure-holding position or a working position by means of which a set fluid pressure can be maintained at the pressure control port A. In order to change the target pressure or the target value of the fluid pressure in the pressure range at or around the pressure control port A, the drive unit 101 can be controlled, for example by the motor driver 201, such that a clamping force of the primary clamping element 104 on the relief element 105 is reduced or increased.

[0078] For the control or regulation of the drive unit 101 or the motor unit M, a position setpoint can be transmitted from the control unit 202.

[0079] Figs. 2 to 4 show a schematic sectional view of the device 100 according to a first embodiment of Fig. 1 in various setting positions or operating states.

[0080] Fig. 2 shows the device 100 in the pressure build-up position, wherein the dashed line with an arrow represents the flow direction of the pressure fluid.

[0081] When the fluid pressure in pressure control port A is less than the desired setpoint or pressure setpoint 304, the relief element 105 and the ring element 108 are held in the position shown in Fig. 2 by the primary and secondary tensioning elements or spring elements 104; 107. A fluid connection can be provided between the supply port B and the pressure control port A.

[0082] When the fluid pressure at the pressure control port A or in the (fluid pressure) region of the pressure control port A has risen sufficiently to generate a force in or on the relief piston 105, in particular so that the primary tensioning element or spring element 104 can be compressed, the device assumes a holding pressure position, as shown in Fig. 3.

[0083] If a fluid pressure above the setpoint or pressure setpoint is present at the pressure control port A or at the associated pressure range within the housing element 102, the primary clamping element 104 is additionally or more strongly compressed by means of the relief piston 105, as shown in Fig. 4, whereby pressure fluid can escape along the ring element 108 via the outlet port C.

[0084] As an alternative to the first embodiment according to Fig. 1, the relief element or the relief piston 105 could be replaced by a membrane element or a piston element with a membrane.

[0085] Furthermore, a position sensor for transmitting position signals 306 can be dispensed with, in particular, if the drive element 101 or the motor unit M is controlled in an open control loop, as in the case of a stepper motor, for example. The (position) position of the motor unit M can be determined, for example, based on the control signals.

[0086] Furthermore, an end face of the ring element or piston ring element 108 facing away from the relief element 105 can contribute to increasing the preload of the sealing element or the O-ring 122 on the ring element 108 in order to avoid an undesirable pressure build-up when the pressure in the supply connection B increases or is too high.

[0087] Fig. 5 shows a schematic illustration of the correlation or proportionality between an (emergency brake) pressure at the pressure control port A and the setting position of the drive unit 101.

[0088] One application of the device, e.g. according to the first embodiment of Fig. 1 , can be to control the (emergency brake) pressure proportionally to the total load / total weight of a vehicle or rail vehicle.

[0089] In addition to the closed pressure control, as shown in Fig. 1, the emergency brake pressure can be correlated with the (setting) position of the drive unit 101 or the motor unit M, as shown in Fig. 5.

[0090] Especially for safety reasons, the motor position for the drive unit

[0091] 101 can be mechanically limited or restricted by fixed stops in order to ensure a minimum braking force, in the sense of a specific fluid pressure at the pressure control connection A.

[0092] Possible functional extensions are possible through a pilot pressure unit, for example with first and second actuating magnets M1 and M2.

[0093] Fig. 6 shows a schematic sectional view of the device according to a second embodiment of the device.

[0094] In particular, Fig. 6 shows an example of the device 100 with two additional actuating magnets M1; M2 for the configuration of a pilot pressure unit.

[0095] The actuating magnets M1; M2 can each act on a pilot control section 210 of the relief element 105 in order to be able to implement, simulate or provide a pilot pressure.

[0096] In particular, proportional pressure control can be provided in this way.

[0097] Furthermore, according to Fig. 6, the device 100 can be combined with a 3 / 2 valve for emergency release, wherein the 3 / 2 valve is connected to the pressure control connection A.

[0098] The valve port F of the 3 / 2 valve can be connected to the pressure control port A of the device 100, the supply port B to a brake pressure source, e.g., a fluid pressure reservoir, and the output port C can be a ventilation channel open to the atmosphere.

[0099] When the actuating magnet M1 is energized or activated, the fluid pressure at the pressure control port A can be reduced by displacing the relief element 105 against the clamping force of the primary clamping element 104 and providing a fluid connection between the pressure control port A and the output port C. When the actuating magnet M2 is energized or energized, the fluid pressure can be increased by displacing the ring element 108 against the clamping force of the secondary clamping element 107 and providing a fluid connection between the pressure control port A and the supply port B.

[0100] The pilot pressure unit with the first and second actuating magnets M1; M2 can control the (service brake) pressure at the pressure control port A and, in the event of a fault, set an emergency braking force as a safety pressure. This safety pressure is variable by the drive unit 101 or the motor unit M and can be dependent on the vehicle load / weight, as shown in Fig. 5.

[0101] In particular, such a fault case, i.e. the provision of an emergency brake pressure, can also be triggered by the actuation of an external switching element 400 by a user or a central control unit of a vehicle.

[0102] In addition to providing an emergency brake pressure, the brake pressure could also be controlled directly using the pilot pressure unit, e.g. by means of the control magnets M1; M2, or alternatively in connection with the pressure control port A with a relay valve, as shown in Fig. 6.

[0103] Fig. 7 shows a schematic illustration of the controllability according to the second embodiment of Fig. 6 (left) and in the case of a current-free switching or electrical de-energization of the device (right).

[0104] In particular, Fig. 7 illustrates how the fluid pressure or brake pressure at the pressure control port A can be controlled or regulated when the device 100 is electrically de-energized or de-energized (Fig. 7, right), and how the device 100 could be controlled or regulated by selectively energizing or energizing the first and second actuating magnets M1; M2 according to the embodiment in Fig. 6.

[0105] In this way, the powerless brake pressure or the brake pressure at the pressure control connection

[0106] A in the de-energized state of the device 100, a fail-safe fluid pressure that could be used in an emergency braking situation and / or corrected by adjusting the position of the motor unit M.

[0107] Furthermore, a variant with only one first or second actuating magnet M1; M2 can also be used.

[0108] The respective actuating magnet M1; M2 can be used to move the relief element 105 to a maximum fluid pressure reduction or venting position. This allows for rapid pressure reduction or venting between the pressure control port A and the output port C without having to use the drive unit 101 or the motor unit M.

[0109] Fig. 8 shows a schematic sectional view of the device according to a third embodiment.

[0110] Fig. 8 illustrates an embodiment of the device 100 for controlling the brake pressure at the pressure control port A directly, ie without an additional relay valve.

[0111] The switching mechanism for the embodiment according to Fig. 8 is illustrated by the separately shown diagram of the valve connection with the (pressure fluid) inlet or inlet 610 and the (pressure fluid) outlet or output or vent 620 as well as the (externally actuable) switching unit 400, for example for triggering an emergency brake pressure.

[0112] The drive unit 101 may have a gear unit GB in addition to the motor unit M in order to amplify the motor torque.

[0113] According to Fig. 8, a pilot pressure unit can be designed in the form of a double-acting actuator, with a pilot pressure chamber 220, a primary pilot pressure port D, a secondary pilot pressure port E, and the pilot section 210 of the relief element 105. With a required pilot pressure, the relief element 105, in particular in the form of a diaphragm element or a piston element with a diaphragm, can be controlled, regulated, or displaced using the pilot pressure unit in order to provide a suitable fluid connection between the pressure control port A, the supply port B, and / or the output port C as required.

[0114] When the fluid pressure at the primary pilot pressure port D is increased, the fluid pressure at the pressure control port A is also increased via the fluid connection to the supply port B. When the fluid pressure at the secondary pilot pressure port E is increased, the brake pressure or the fluid pressure at the pressure control port A is released or reduced or drained or vented via the output port C.

[0115] Fig. 9 shows a schematic sectional view of the device 100 according to a fourth embodiment.

[0116] In particular, according to Fig. 9, it is provided that the relief element 105 is arranged in a pilot pressure chamber 220, wherein the primary pilot pressure connection D and the secondary pilot pressure connection E are formed on opposite sides of the relief element 105, so that the relief element 105 is translationally movable along the primary and / or secondary pilot pressure connection D; E based on fluid pressures.

[0117] A fluid connection between the pressure control port A, the supply port B and / or the output port C can be achieved by controlling or regulating the fluid pressure along the primary and / or secondary pilot pressure port D; E and the resulting movement of the relief element 105.

[0118] Thus, the relief element 105 can be driven in service mode 530 according to Fig. 9, so that no additional pilot pressure section or piston is required on the relief element 105. In particular, the primary and secondary pilot pressure ports D; E can be connected to further relay valves, for example, for providing a pilot pressure 520, for maintaining a pilot pressure 510, and / or for reducing or releasing or venting a pilot pressure along the primary and / or secondary pilot pressure port D; E.

[0119] In emergency operation, all additional (solenoid) valves that can relieve or vent the pressure control port A or the associated fluid pressure area within the housing element 102 and / or that can connect the ports E and F to each other can be inactive.

[0120] In summary, by means of the present invention, a device 100, in particular a pressure control device, can be provided which allows efficient and reliable pressure control, e.g. for the provision of a brake pressure and / or an emergency brake pressure.

[0121] Even in the de-energized state, a set pressure control can be maintained or maintained by means of the self-locking transfer element 103.

[0122] In addition, a specific setpoint / pressure can be predefined or specified for the device 100 by means of the transfer element 103 and the primary clamping element 104, depending on which a fluid pressure can be maintained at the pressure control port A, an increase in the fluid pressure at the pressure control port A can take place via a fluid connection to the supply port B and / or a fluid pressure reduction or a venting of the pressure control port A can be provided along a fluid connection to the output port C.

[0123] In addition, the control and / or regulation of the device 100 can be configured using a pilot pressure unit, so that the provision of a fluid pressure at the pressure control port A can be controlled or regulated as desired. LIST OF REFERENCE SYMBOLS

[0124] 100 device

[0125] 101 Drive element or electric motor

[0126] 102 Housing element

[0127] 103 Transfer element

[0128] 104 primary clamping element

[0129] 105 Relief element or relief piston element

[0130] 106 Sealing element or disc seal

[0131] 107 secondary clamping element

[0132] 108 Ring element or piston ring element

[0133] 121 Sealing element

[0134] 122 Sealing element

[0135] 123 Sealing element

[0136] 201 Motor Driver

[0137] 202 Control unit

[0138] 210 Input tax section

[0139] 220 pilot pressure chamber

[0140] 302 Pressure sensor signal

[0141] 304 Pressure setpoint

[0142] 306 Position signal

[0143] 308 Position setpoint

[0144] 400 switching unit

[0145] 510 Hold pressure

[0146] 520 Build up pressure

[0147] 530 Service mode

[0148] 610 Inlet or inlet

[0149] 620 Outlet or ventilation

[0150] A pressure control connection

[0151] B Supply connection

[0152] C Output connector

[0153] D primary pilot pressure connection

[0154] E secondary pilot pressure connection F connection of the external (relay) valve

[0155] M motor unit

[0156] M1 first actuating magnet

[0157] M2 second actuating magnet GB gear unit

Claims

PATENT CLAIMS 1. A device (100), in particular a pressure control device, for controlling and / or regulating a fluid pressure in a braking system and / or a vehicle, in particular a rail vehicle, comprising at least one housing element (102), at least one relief element (105), at least one transfer element (103), and at least one primary tensioning element (104), wherein the at least one housing element (102) has at least one supply connection (B), at least one pressure control connection (A), and at least one output connection (C), wherein the relief element (105) is movably arranged within the housing element (102) such that a fluid connection between the supply connection (A), the pressure control connection (B), and / or the output connection (C) can be controlled and / or regulated, so that a predeterminable setpoint value of the pressure fluid can be set at the pressure control connection (A),wherein the primary clamping element (104) is arranged between the transfer element (103) and the relief element (105), so that a clamping force can be exerted on the relief element (105) via the primary clamping element (104), which preferably counteracts the fluid pressure at the pressure control connection (A), wherein the transfer element (103) is movable to adjust a clamping force of the primary clamping element (104) and wherein the transfer element (103) is designed to be self-locking.

2. Device (100) according to claim 1, characterized in that the fluid connection between the supply connection (B), the pressure control connection (A) and / or the output connection (C) is controllable and / or adjustable in such a way that a fluid pressure above a predeterminable setpoint can be reduced via the output connection (C), a fluid pressure below the predeterminable setpoint can be built up by means of a fluid connection between the pressure control connection (A) and the supply connection (B), and a fluid pressure at the pressure control connection (A) which is at least substantially equal to the predeterminable setpoint can be maintained at least substantially.

3. Device (100) according to one of the preceding claims, characterized in that the device (100) has at least one secondary clamping element (107) and one ring element (108), in particular a piston ring element, wherein the secondary clamping element (107) is arranged in such a way, in particular between the housing element (101) and the ring element (108), that a prestressing force can be exerted on the ring element (108) by the secondary clamping element (107), and wherein the relief element (105) and the ring element (108) can be brought into operative connection with one another directly or indirectly in such a way that the fluid connection between the supply connection (B), the pressure control connection (A) and / or the output connection (C) can be controlled and / or regulated.

4. Device (100) according to one of the preceding claims, in particular according to claim 3, characterized in that the primary clamping element (104) and / or the secondary clamping element (107) is designed as a compressible clamping element (104; 107), in particular as a spring element, for providing a prestressing force, wherein the primary clamping element (104) can be prestressed as required by means of the transfer element (103).

5. Device (100) according to one of the preceding claims, characterized in that the at least one transfer element (103) is designed in the form of a screw connection, in particular is provided for forming a screw connection.

6. Device (100) according to one of the preceding claims, characterized in that the device (100) has a drive unit (101), in particular an electric motor, for preferably rotary driving of the transfer element (103), so that the transfer element (103) can be moved in a preferably translational direction to adjust a pretensioning force of the primary tensioning element (104).

7. Device (100) according to claim 6, characterized in that the fluid pressure at the pressure control connection (A) is controllable and / or adjustable in proportion to a setting position of the drive element (101), wherein the drive element (101) preferably has a limited, in particular a mechanically limited, setting range.

8. Device (100) according to one of claims 6 to 7, characterized in that the device (100) has a control unit (202) for controlling and / or regulating the drive unit (101), wherein the device (100) is preferably designed with a pressure sensor on and / or in a fluid pressure region of the pressure control connection (A) and / or with a position sensor on the drive unit (101), so that the drive unit (101) can be controlled and / or regulated by means of the control unit (202), preferably on the basis of pressure signals (302) and / or position signals (306).

9. Device (100) according to one of the preceding claims, characterized in that the relief element (105) is designed as a piston element, as a membrane element or as a piston-membrane element.

10. Device (100) according to one of the preceding claims, characterized in that the device (100) has at least one pilot pressure unit, so that a pilot pressure for the pilot control and / or pre-regulation of the relief element (105) is adjustable, in particular a pilot pressure can be applied as a counterforce to the primary clamping element (104) and / or to the secondary clamping element (107), wherein preferably - the pilot pressure unit is designed with at least one first actuating magnet (M1) and at least one second actuating magnet (M2), which are arranged along a pilot control section (210) of the relief element (105) in such a way that the relief element (105) is movable, in particular translationally movable, depending on an excitation of the first actuating magnet (M1) and / or the second actuating magnet (M2); - the housing element (102) has a first pilot pressure connection (D) and a second pilot pressure connection (E) for forming a pilot pressure chamber (220) of the pilot pressure unit, so that a pilot pressure can be provided along the pilot section (210) of the relief element (105) within the pilot pressure chamber (220), in particular on one side of opposite sides of the pilot section (210), so that the relief element (105) is movable, in particular translationally movable; and / or - the housing element (102) has a pilot pressure chamber (220) with the relief element (105) arranged therein, wherein the primary pilot pressure connection (D) and the secondary pilot pressure connection (E) are provided on opposite sides of the relief element (105) such that a movement of the relief element (105) in the pilot pressure chamber (220) can be controlled and / or regulated via the primary and secondary pilot pressure connections (D; E), for controlling and / or regulating a fluid connection between the pressure control connection (A), the supply connection (B) and / or the output connection (C).

11. Braking system with at least one device (100) according to one of the preceding claims, wherein a braking pressure and / or an emergency braking pressure for at least one braking unit can be provided via the pressure control connection (A).

12. Vehicle, in particular a rail vehicle, with a device (100) and / or a braking system according to one of the preceding claims.

Images