PNEUMATIC VALVE DEVICE FOR A COMPRESSED AIR DEVICE AND GEARBOX CONTROL OR CLUTCH SYSTEM WITH THE PNEUMATIC VALVE DEVICE

Description

[0001] The invention relates to a pneumatic valve device for a compressed air device, in particular with a pneumatic cylinder, in particular for an automatic clutch system or an automated transmission control and clutch system, according to the preamble of claim 1. The invention also relates to a transmission control or clutch system with the pneumatic valve device, in particular for commercial vehicles, such as a truck or a passenger bus.

[0002] Such a pneumatic valve device comprises, in particular, a pneumatic solenoid valve. A solenoid valve can be represented as an electromagnetically operated pneumatic solenoid valve, which, for example, uses a permanent magnet within an actuator to hold a valve body in a predetermined position and thus to realize various switching states when controlling compressed air. A pneumatic solenoid valve is known, for example, from WO 97 / 44580 A1 or EP 2 818 779 A1.

[0003] JP 2015 140843 A and DE 601 08 282 T2 each describe a pneumatic valve device as a solenoid valve with an outlet opening or an outlet connection, which is formed with a partially widening outlet path or vent channel from a valve seat or valve mechanism section in the valve body.

[0004] Such a pneumatic solenoid valve has, in particular, a housing body with a supply channel, a consumer channel, and a vent channel. The housing body, in particular with at least one inlet and at least one outlet, surrounds a valve chamber in which a valve body is movable along a valve axis relative to a vent valve seat to the vent channel and a supply valve seat to the supply channel by means of an actuator, counter to the force of a valve spring. In this sense, the valve body or similar valve element serves to open and close the valve.

[0005] The actuator can, in particular, interact with a valve spring, which exerts a force on the valve body, for example, opposite to the direction of action of the actuator, and thus determines whether the valve is open or closed when energized, for example, by a magnet. A valve body can, in a first position, open a valve chamber and a vent valve seat to the vent channel, and, in a second position, open a supply channel to the supply valve seat and the valve chamber.

[0006] DE 40 07 009 A1 describes a solenoid valve consisting of a half-block forming the electrical actuation or control part and a pneumatic half-block enclosing the valve part. A valve element is adjustable over a short distance along its axis between two opposing valve seats and within the cavity. The valve seats each enclose an opening in a line, one of which is connected to an outflow channel and the other to an inlet channel for a pressurized fluid. Both channels open onto the same surface of the half-block. A third channel, forming an outlet channel, also connects the cavity to the surface. The required length of the valve body's travel can be determined by measuring the pressure or flow rate of the fluid circulating between the channels.

[0007] A maximum flow rate of compressed air through the pneumatic solenoid valve can be significantly limited by a clear width of a valve passage, for example by a clear width of the vent valve seat passage.

[0008] Furthermore, the actuator's power consumption can influence the degree of opening and thus also the flow rate of the solenoid valve, via its maximum magnetic force. This may mean that conventional solenoid valves have a certain minimum size and minimum power consumption for a given flow rate.

[0009] EP 2 818 779 A1 essentially describes a solenoid valve with a diffuser characteristic. Such a valve can still be improved.

[0010] It is desirable to improve or increase the flow rate of a pneumatic solenoid valve, particularly for use with a pneumatic cylinder, particularly in a transmission control or clutch system, especially during venting. In particular, this should be possible without having to significantly increase the clear width of a valve passage and / or the current consumption of the actuator – thus, the most compact design possible can be achieved even with an improved or increased flow rate. Previously known pneumatic solenoid valves can still be improved in this regard.

[0011] This is where the invention comes in, the object of which is to provide a pneumatic valve device, in particular with a pneumatic cylinder, in which a flow rate of a pneumatic solenoid valve is improved, in particular with regard to use with a pneumatic cylinder, preferably in a transmission control or clutch system.

[0012] The object is achieved by a pneumatic valve device, in particular with a pneumatic cylinder, of claim 1.

[0013] Such a pneumatic valve device, in particular with a pneumatic cylinder, in particular for an automatic clutch system or an automated transmission control and clutch system, comprises: a pneumatic solenoid valve with a housing body with a supply channel, a consumer channel and a vent channel, wherein the housing body surrounds a valve chamber in which a valve body is movable along a valve axis relative to a vent valve seat to the vent channel and a supply valve seat to the supply channel by means of an actuator, against the force of a valve spring, wherein the valve body opens the valve chamber and the vent valve seat to a vent channel in a first position and opens a supply channel to the supply valve seat and the valve chamber in a second position.

[0014] According to the invention, the pneumatic valve device is provided with the housing body having a diffuser which adjoins the vent valve seat to the vent channel, wherein a diffuser channel of the diffuser widens in cross section from the vent valve seat to the vent channel, and the diffuser channel runs transversely to the valve axis, and a vent valve seat passage has a clear width which is smaller than a second clear width of the diffuser channel.

[0015] According to the invention, it is also provided that the diffuser channel has a first section with a cylindrical and / or blunt conical design, and / or has a second section with a curved design, and in the diffuser channel opposite the vent valve seat passage, a flow baffle element is formed as a mandrel-shaped flow guide element on the valve axis.

[0016] The valve body, which is mounted opposite a vent valve seat and a supply valve seat, by means of an actuator, against the force of a valve spring, movable along a valve axis, enables two switching positions of the solenoid valve.

[0017] In other words, according to the concept of the invention, the venting channel is integrated into the housing body, and the venting channel has a diffuser that connects transversely to the venting valve seat. Furthermore, a diffuser channel of the diffuser widens in cross-section from the venting valve seat to the venting channel outlet, with the venting channel running transversely to the valve axis. The venting valve seat passage has a clear width that is smaller than a second clear width of the diffuser channel.

[0018] The invention is based on the idea that air is accelerated when the cross-section expands. This enables faster venting of the solenoid valve, even when the diameter of the vent valve seat passage remains at least constant. The invention recognizes that power consumption is influenced by the degree of opening from the vent valve seat to the vent channel outlet.

[0019] The invention has recognized that an improved flow rate can be achieved through the use of a diffuser, and in particular the power consumption of the solenoid valve can be reduced. Furthermore, the invention has recognized that an improved flow rate is made possible by a diffuser mounted transversely - in particular orthogonally - to the valve axis. With the help of the air deflection as a result of the diffuser mounted transversely - in particular orthogonally - to the valve axis and the special shape of the vent with the diffuser to the vent channel, the flow of air is accelerated from the vent valve seat to the vent channel via the transversely mounted diffuser. This leads to a significantly larger effective vent nominal diameter.

[0020] Furthermore, a flow rate that reduces power consumption is achieved while requiring less space. The space is particularly adapted to the use of the pneumatic valve device for a compressed air system, in particular with a pneumatic cylinder, in particular for an automatic clutch system or an automated transmission control and clutch system.

[0021] To achieve the object, the invention also provides a system according to claim 14, namely a system comprising a pneumatic cylinder for a compressed air device, in particular a transmission brake, and a pneumatic valve device according to the invention, namely a pneumatic solenoid valve with a housing body having a supply channel, a discharge channel, and a vent channel. According to the invention, the supply channel of the pneumatic solenoid valve is connected to a pressure chamber of the pneumatic cylinder for venting and aeration with compressed air.

[0022] Advantageously, the supply channel of the pneumatic solenoid valve is connected to a pressure chamber of the pneumatic cylinder for venting in the first position of the valve body of the solenoid valve and for ventilation in the second position of the valve body of the solenoid valve.

[0023] To achieve the object, the invention also provides a transmission control or clutch system of claim 15, namely with a pneumatic valve device according to the invention and / or a system according to the invention.

[0024] Preferred developments of the invention can be found in the dependent claims and specify in detail advantageous possibilities for realizing the concept explained above, within the scope of the task and with regard to further advantages.

[0025] Preferably, the general structure of the solenoid valve corresponds to that of a 3 / 2-way valve.

[0026] Preferably, in the first position of the valve device, the consumer channel is open via the valve chamber to the vent channel, and the supply valve seat is closed. Preferably, additionally or alternatively, in the second position of the valve device, the supply channel is open via the valve chamber to the consumer channel, and the vent valve seat is closed.

[0027] Preferably, in the first position, the valve body opens the valve chamber via the vent valve seat toward the vent channel and closes the supply channel. Preferably, in the second position, the valve body opens the supply channel to the supply valve seat and closes the vent channel via the vent valve seat.

[0028] Advantageously, the valve device in the housing body has a wall surrounding the valve chamber, with the diffuser channel running in the wall, so that the diffuser is integrated into the housing body. It is advantageous that the diffuser channel runs transversely to the valve axis, starting from the vent valve seat.

[0029] Preferably, the vent valve seat has a vent valve seat passage with a first clear width and a vent valve seat outlet with a second clear width. Advantageously, the first and second clear widths are below a certain value.

[0030] In particular, the vent valve seat can have a clear diameter that is larger than a nominal ventilation diameter of the supply channel. Preferably, the vent valve seat has a vent valve seat passage and a vent valve seat outlet, each with a clear diameter that is larger than the nominal ventilation diameter of the supply channel.

[0031] A first clear width of the diffuser channel adjacent to the vent valve seat outlet has a first clear width in the range between a first specific value and a second specific value; the first and second specific values ​​are, for example, in the mm range.

[0032] A second clear width of the diffuser channel, adjacent to the first outlet of the vent channel, has a second clear width in the range between a further first specific value and a further second specific value; the first and second further specific values ​​are, for example, in the mm range.

[0033] The diffuser channel has a flow deflector and / or flow guide element. Preferably, the first clear width of the diffuser channel adjacent to the vent valve seat outlet is smaller than the second clear width of the diffuser channel adjacent to the first outlet of the vent channel.

[0034] The vent valve seat has a length along a valve axis in the range of a first specific length value and a second specific length value. Advantageously, the diffuser channel has a length transverse to the valve axis in the range of a first and second length value; the first and second length values ​​are preferably in the mm range.

[0035] According to the invention, a mandrel-shaped flow guide element is mounted along the valve axis on the inner wall of the diffuser channel, opposite the vent valve seat passage. Advantageously, in a further development of the invention, an inner wall of the diffuser channel, opposite the vent valve seat passage, is designed as the flow deflection element.

[0036] In a further development, the flow impact element can be a flow edge directed against a venting direction to the venting valve seat, in particular a flow tip or a flow web.

[0037] Preferably, the housing body has an upper sealing groove and a lower sealing groove on the outside, wherein the diffuser is connected in a plane between the upper and lower sealing groove.

[0038] According to the invention, the diffuser channel has a first section with a cylindrical and / or blunt conical design, and / or the diffuser channel has a second section with a curved design, in particular in the form of a horn.

[0039] Advantageously, the valve chamber runs along the valve axis, and the diffuser channel runs radially thereto. In particular, the diffuser channel runs radially with sections aligned perpendicular to the valve axis. However, any transverse alignment of the diffuser channel, i.e., particularly diagonally or perpendicularly to the valve axis, is advantageous.

[0040] In a preferred development, the diffuser has at least one first radially oriented diffuser channel along a first diffuser angle. In a preferred development, the diffuser has a first radially oriented diffuser channel along a first diffuser angle and a second radially oriented diffuser channel along a second diffuser angle. Advantageously, the first and second diffuser channels are arranged symmetrically opposite one another to the valve axis.

[0041] In another advantageous development, the diffuser channel is arranged in a ring around the valve axis.

[0042] Embodiments of the invention are now described below with reference to the drawing. These are not necessarily intended to represent the embodiments to scale; rather, where useful for explanation, the drawing is schematic and / or slightly distorted. With regard to additions to the teachings immediately apparent from the drawing, reference is made to the relevant prior art. It should be noted that various modifications and changes to the form and detail of an embodiment can be made without departing from the general idea of ​​the invention. The features of the invention disclosed in the description, in the drawing and in the claims can be essential for the further development of the invention, both individually and in any combination.Furthermore, all combinations of at least two of the features disclosed in the description, the drawings and / or the claims fall within the scope of the invention. The general idea of ​​the invention is not limited to the exact form or detail of the preferred embodiment shown and described below, or limited to an object that would be limited compared to the object claimed in the claims. In the case of specified dimensioning ranges, values ​​lying within the stated limits are also intended to be disclosed as limit values ​​and can be used and claimed as desired. For the sake of simplicity, the same reference numerals are used below for identical or similar parts or parts with identical or similar functions.

[0043] Further advantages, features and details of the invention will become apparent from the following description of the preferred embodiments and from the drawing, which shows: FIG. 1 shows a symbolic representation of a transmission, for example an AMT system (Automated Manual Transmission) with a transmission brake and a symbol drawn there for a pneumatic solenoid valve according to a preferred embodiment as a preferred example of a pneumatic valve device for a compressed air device; FIG. 2 shows in view (A) a first circuit diagram of a first arrangement with a pneumatic solenoid valve in the form of a 3 / 2-way valve according to a first embodiment and in view (B) a second circuit diagram of a second arrangement with a pneumatic solenoid valve in the form of a 3 / 2-way valve according to a second embodiment, each for the FIG. 1 shown AMT system, each with a preferred embodiment of a pneumatic valve device; FIG. 3 in a first view (A) a pneumatic valve device here in the form of a pneumatic solenoid valve in the form of a 3 / 2-way valve, showing a venting position in which the valve body in a first position (E) opens the valve chamber and the vent valve seat to a vent channel, and in a second view (B) a pneumatic valve device here in the form of a pneumatic solenoid valve in the form of a 3 / 2-way valve, in which in a second position (V) the valve chamber and the supply valve seat are open from a supply channel to a consumer channel; FIG. 4 the structure of a pneumatic valve device here in the form of a pneumatic solenoid valve in the form of a 3 / 2-way valve according to the particularly preferred embodiment in the first position (E) as shown in FIG. 3A for venting, with the diffuser connecting to the vent valve seat to the vent channel, the diffuser channel of the diffuser widening in cross-section from the vent valve seat to the vent channel.

[0044] FIG. 1 symbolically shows a transmission with a transmission brake 900 as an example of an automatic clutch system or an automated transmission control and clutch system 1000; here with a compressed air device in the form of a transmission brake 900 for the transmission 910.

[0045] Typically, a torque (not shown in detail) is transmitted via shafts with a number of gear trains 920, ie here an input shaft of the transmission 910 to a countershaft and from there to an output shaft. The shafts are provided with a number of gear trains 920 corresponding to the number of gears. A transmission brake 900 can be constructed, for example, pneumatically by means of two two-way valves or by means of a 3 / 2-way valve actuated brake 930, which is connected to the countershaft via a fixed transmission ratio. In particular, such a 3 / 2-way valve is exemplified as a pneumatic solenoid valve according to the concept of the invention based on the FIG. 2 bis FIG. 4 explained.

[0046] The transmission 910 with the transmission brake 900 is shown here merely as an example and further comprises at least one compressed air source 940, which serves as an energy storage device for the pneumatically operated components. Typically, the transmission 910 is controlled by a transmission actuator as an actuator (not shown in detail) and is actuated by a shift lever unit via a cable harness for vehicle data to select a gear. Furthermore, a clutch is controlled by a clutch actuator as an actuator. An AMT solenoid valve can be used, as required, as a clutch actuator or as a transmission actuator, or as a pilot valve for pre-controlling these components.Such an AMT solenoid valve can also be implemented, for example, as a pneumatic solenoid valve according to the concept of the invention; accordingly, the following description of a 3 / 2-way valve also applies, in a transferable manner, to such an AMT solenoid valve.

[0047] In this respect, the following description of a transmission control and clutch system 1000; here with a compressed air device in the form of a transmission brake 900 for the transmission 910 with a pressure cylinder 700 of the FIG. 2 and a pneumatic solenoid valve 10 are to be understood as exemplary for a variety of applications of a pneumatic valve device 100 explained here for a compressed air device.

[0048] FIG. 2 shows for each FIG. 1 shown transmission control and clutch system 1000; here with a compressed air device in the form of a transmission brake 900 for the transmission 910, respectively a preferred embodiment of a pneumatic valve device 100 with a pneumatic solenoid valve 10 in the form of a 3 / 2-way valve in a first embodiment in view (A) or with two pneumatic solenoid valves each in the form of a 3 / 2-way valve in a second embodiment in view (B) - in both embodiments, the pneumatic valve device 100 is designed as a system with a pressure cylinder 700, for example for the FIG. 1 shown transmission brake 900 is realized.

[0049] The pneumatic solenoid valve in the form of a 3 / 2-way valve is shown as a pneumatic circuit symbol. The circuit symbol corresponds to that of a 3 / 2-way valve with an actuator 410 in the form of an electrically energized magnet for actuating a valve body of the 3 / 2-way valve against the force of a valve spring 420 in two switching states, which can be recognized in the symbol of the pneumatic solenoid valve 10 as a 3 / 2-way valve.

[0050] The pneumatic solenoid valve 10 in the form of a 3 / 2-way valve has a first inlet (1), hereinafter referred to as the "supply connection", and a second inlet (2), hereinafter referred to as the "consumer connection", as well as an outlet (3), hereinafter referred to as the "vent connection".

[0051] Views (A) and (B) also show two possible switching positions of the valve. In a first position (E), the consumer port (2) is pneumatically connected to the vent port (3), while the supply port (1) is closed. In a second position of the valve (V), the vent port (3) is closed, while a flow path is enabled between the supply port (1) and consumer port (2) in a shunt circuit.

[0052] In FIG. 2 The valve device 100 comprises the pneumatic solenoid valve 10, which in turn has or is connected to a supply channel 430, a consumer channel 440 and a vent channel 160. As in FIG. 3 and FIG. 4 As shown in more detail, the supply channel 430 and / or the consumer channel 440 and / or the vent channel 160 are integrated in a housing body 101 of the pneumatic solenoid valve 10.

[0053] In view (A) of the FIG. 2 The supply channel 430 of the pneumatic solenoid valve 10 is connected to a pressure chamber 710 of the pneumatic cylinder 700 for venting and ventilation with compressed air. In view (B) of the FIG. 2 the supply channel 430 of the first pneumatic solenoid valve 10.1 (shown on the left) is connected to a first pressure chamber 710 of the pneumatic cylinder 700 for venting and aerating with compressed air and the supply channel 430 of the second pneumatic solenoid valve 10.2 (shown on the right) is connected to a second pressure chamber 720 of the pneumatic cylinder 700 for venting and aerating with compressed air.

[0054] In particular, the first position E of the valve body of the solenoid valve 10, 10.1, 10.2 is provided for venting and the second position V of the valve body of the solenoid valve 10, 10.1, 10.2 is provided for ventilation.

[0055] Specifically, in a valve arrangement 100 according to view (A) the FIG. 2 provided that compressed air from the compressed air source 940, when switched on --in the illustrated switching state of S1-- flows into the consumer channel 440 and from there into the pneumatic cylinder 700, ie into the pressure chamber 710, which is referred to here as pressure chamber C1; switching state S1, (V).

[0056] During venting --switching state S2, (E)-- compressed air escapes from the pressure chamber 720 of the pneumatic cylinder 700, which is referred to here as the pressure and spring chamber C2, into the atmosphere via the vent channel 160.

[0057] Advantageous for the application here --e.g. the transmission brake 900 according to FIG. 1 -- is that the compressed air can escape significantly faster than it is supplied. The piston K in the pneumatic cylinder 700, as a spring-return cylinder, is pushed back more quickly by the solenoid valve 10, 10.1, 10.2 according to the concept of the invention, since this pneumatic valve device 100 has a diffuser 110, symbolically represented here, on the vent channel 160. This eliminates the need for a separate, additional quick-vent valve, as is otherwise typically used.

[0058] In a valve device 100 with a first and second pneumatic solenoid valve 10.1, 10.2 according to view (B) of the FIG. 2 a double-acting pneumatic cylinder 700 is provided; ie, when the first solenoid valve 10.1 is actuated in switching state S1, compressed air flows into the first pressure chamber 710 of the pneumatic cylinder 700, which is referred to here as pressure chamber C1; switching state S1, (V).

[0059] In this case, the compressed air is forced out of the opposite chamber of the second pressure chamber 720 of the pneumatic cylinder 700 through the venting channel 160 of the second pneumatic solenoid valve 10.2; switching state S2, (E). To avoid back pressure and achieve a rapid displacement of the piston K in the pneumatic cylinder 700, the design according to the invention helps and enables faster venting. This enables greater dynamics. This is achieved, for example, when shifting gears via a pneumatic cylinder 700 according to the arrangement in view (B) of the FIG. 2 reached.

[0060] Accordingly, compressed air is forced out in the opposite direction from the chamber of the first pressure chamber 710 of the pneumatic cylinder 700 through the vent channel 160 of the first pneumatic solenoid valve 10.1; switching state S1, (E).

[0061] FIG. 3 shows in view (A) and in view (B) the same pneumatic solenoid valve 10 --for example for the realization of the previously in FIG. 2 described first and second pneumatic solenoid valves 10.1, 10.2 in the form of a 3 / 2-way valve in a first and a second switching position to explain the operation and structure of the pneumatic solenoid valve in the form of a 3 / 2-way valve. The cross-section of both exemplary illustrations of the solenoid valve 10 is along the axial direction of the valve axis A1.

[0062] What can be seen here is a pneumatic valve device 100 for a compressed air device, in particular with a pneumatic cylinder 700, in particular for an automatic clutch system or an automated transmission control and clutch system 1000 of the FIG. 2 or FIG. 1 a pneumatic solenoid valve 10 with a housing body 101 with a supply channel 430, a consumer channel 440 and a vent channel 160 is shown.

[0063] The housing body 101 surrounds a valve chamber 500 in which a valve body 200 is movable along a valve axis A1 by means of an actuator 410, counter to the force of a valve spring 420, relative to a vent valve seat 300 to the vent channel 160 and a supply valve seat 400 to the supply channel 430.

[0064] The valve body opens in a first position E - view (A) of the FIG. 3 -- the valve chamber 500 and the vent valve seat 300 to a vent channel 160 and in a second position V --View (B) of the FIG. 3 -- this opens a supply channel 430 to the supply valve seat 400 and the valve chamber 500.

[0065] According to the concept of the invention, the housing body 101 has a diffuser 110 which adjoins the vent valve seat 300 to the vent channel 160, wherein a diffuser channel 111 of the diffuser widens in cross section from the vent valve seat 300 to the vent channel 160.

[0066] According to the concept of the invention, the diffuser channel 111 advantageously runs transversely to the valve axis A1 and a vent valve seat passage 310 has a clear width 311 which is smaller than a second clear width 131, 132, 133 of the diffuser channel 111.

[0067] This solution according to the concept of the invention is further improved in that the vent channel 160 and the diffuser 110 of the solenoid valve 10 are accommodated in its housing body 101. In addition, the vent valve seat 300 has a vent valve seat passage 310 and a vent valve seat outlet 312, which are in FIG. 4 are shown in more detail. These have a clear width that is larger than a nominal ventilation width of the supply channel 430. This means that the vent valve seat 300 specifically has a vent valve seat passage 310 and a vent valve seat outlet 312, each with a clear width that is larger than a nominal ventilation width of the supply channel 430.

[0068] Thus, with the help of the synergistic effect of the air deflection from the vent valve seat 300 to the vent channel 160 and the diffuser 110—that is, through the special arrangement and, if applicable, the shape of the vent channel 160—an acceleration of the flowing compressed air is achieved, which leads to a significantly larger effective vent nominal diameter. This will be explained in detail in the following explanations.

[0069] In FIG. 3 View (A) shows a first position (E) of the pneumatic solenoid valve in the form of a 3 / 2-way valve 10, in which the valve body 200 opens the valve chamber 500 via a vent valve seat 300 to a vent channel 160. This "vent position" E corresponds to the pneumatic connection of consumer port 2 and vent port 3, as shown in FIG. 3 View (A). The compressed air to be discharged is guided from a consumer channel 440, via the valve chamber 500 and the vent valve seat 300, to the vent channel 160 and leaves the solenoid valve 10 through a first and second vent channel outlet 161, 162. The actuator 410 must act against the force of the valve spring 420 in order to close off the valve chamber 500 to the supply valve seat 400, as can be seen from FIG. 2 was explained.

[0070] In the FIG. 3 In the second position V shown in view (B), a supply channel 430 is opened to the supply valve seat 400 and the valve chamber 500. Compressed air to be discharged can be guided from the supply channel 430, via the supply valve seat 400 and the valve chamber 500, to a consumer channel 440 and leaves the solenoid valve 10 in this way, which corresponds to the FIG. 2 corresponds to the circuit shown of supply connection 1 and consumer connection 2. In this position, the valve body 200 blocks the valve chamber 500 from the vent valve seat 300.

[0071] In the two FIG. 3 In the valve positions shown in view (A) and view (B), the consumer channel 440 is open regardless of the position of the valve body 200. Depending on the position for venting E or supply V, the flow direction of the compressed air to be supplied through the consumer channel 440 changes, which is shown accordingly by the guidelines.

[0072] FIG. 4 shows the basic structure of the solenoid valve 10, with an exemplary illustration of the diffuser 110 and based on the design of the vent channel 160. The vent channel 160 is integrated into the housing body 101 and is located between an upper sealing groove 151 and the vent valve seat passage 310, which is located centrally on the valve axis A1 and has a clear width of 311. It is separated from the valve chamber 500 by a wall 140 and is formed from two areas. For reasons of clarity, only the structure located to the left of the valve axis A1 is described in the following. The right side of the solenoid valve is constructed in the same way in this exemplary illustration.

[0073] The first region of the vent channel 160 is referred to as the diffuser 110. This is formed by at least one diffuser channel 111, 112, which widens in cross-section, starting from the valve axis A1, toward a second clear width of the diffuser channel; which is shown here with a second clear width 133 visible on the left and a second clear width 134 visible on the right. The cross-section of the diffuser channel widens along a diffuser angle; which is shown here with a diffuser angle 121 visible on the left and a diffuser angle 122 visible on the right.

[0074] Within the vent channel 160, the second region of the vent channel directly adjoins the diffuser. This cylindrical vent channel outlet 161, 162 has the second clear width of the diffuser channel 133, 134 and is radially delimited by the wall 140.

[0075] In the illustrated embodiment, the diffuser 110 and the vent channel 160 are arranged orthogonally to the valve axis A1, since locating the medium outlet in the axial direction would have compromised the functionality of the solenoid valve due to space constraints. Overall, this provides a larger cross-sectional area for the venting process than with conventional solenoid valves.

[0076] This design solution allows the medium to be discharged to strike the wall of the vent channel perpendicularly after exiting the vent valve seat 300. This is supported by the placement of a flow deflector 620 perpendicular to the vent valve seat passage 310 to keep the flow resistance of the solenoid valve as low as possible. According to the invention, the flow resistance is also reduced by a mandrel-shaped flow guide element 621 mounted at the same location. LIST OF REFERENCE SYMBOLS

[0077] 1Supply connection 2Consumer connection 3Vent connection 10Pneumatic solenoid valve, especially 3 / 2-way valve 100 Pneumatic valve device 101 Housing body 110 Diffuser 111 First diffuser channel 112 Second diffuser channel 121 First diffuser angle 122 Second diffuser angle 131 First clear width of the first diffuser channel 132 First clear width of the second diffuser channel 133 Second clear width of the first diffuser channel 134 Second clear width of the second diffuser channel 140 Wall 151 Upper sealing groove 152 Lower sealing groove 160 Vent channel 161 First vent channel outlet 162 Second vent channel outlet 200Valve body 300Vent valve seat 310Vent valve seat passage 311Clear width of the valve seat 312Valve seat outlet 400Supply valve seat 410Actuator 420Valve spring 430Supply channel 440Take-off channel 500Valve chamber 620Flow deflector 621Thorn-shaped flow guide element with flow edge 700Pneumatic cylinder 710First pressure chamber 720Second pressure chamber 800System of pneumatic solenoid valve 10 with pneumatic cylinder 700Compressed air device in the form of a gear brake 900Gearbox 910Gear trains 920Brake 930Compressed air source 940 1000Transmission control and clutch system in a transmission A1Valve axis ERVenting direction VValve EFirst position

Claims

1. Pneumatic valve apparatus (100) for a compressed air device, in particular comprising a pneumatic cylinder, in particular for an automatic clutch system or an automated transmission control and clutch system, the apparatus comprising: - a pneumatic solenoid valve (10) comprising a housing body (101) having a supply channel (430), a receiving channel (440) and a vent channel (160), - the housing body (101) surrounding a valve chamber (500) in which a valve body (200) is movable, by means of an actuator, along a valve axis (A1), against the force of a valve spring (420), relative to a vent valve seat (300) to the vent channel (160) and a supply valve seat (400) to the supply channel (430), - the valve body opening, in a first position (E), the valve chamber (500) and the vent valve seat (300) to a vent channel (160) and opening, in a second position (V), a supply channel (430) to the supply valve seat (400) and the valve chamber (500), - the housing body (101) comprising a diffuser (110) which adjoins the vent valve seat (300) to the vent channel (160), a diffuser channel (111, 112) of the diffuser (110) widening in cross-section from the vent valve seat (300) to the vent channel (160), and - the diffuser channel (111, 112) running transversely to the valve axis (A1), and a vent valve seat passage (310) having a clearance (311) which is smaller than a second clearance (133, 134) of the diffuser channel (111, 112), characterized in that the diffuser channel (111, 112) - comprises a first portion having a cylindrical and / or blunt conical form, and / or - comprises a second portion having a curved form, and in the diffuser channel (111, 112), - opposite the vent valve seat passage (310), a flow baffle element (620) is formed as a mandrel-shaped flow guide element (621) on the valve axis (A1).

2. Valve apparatus according to claim 1, characterized in that - in the first position, the receiving channel (440) is open to the vent channel (160) via the valve chamber (500), and the supply valve seat (400) is closed, and - in the second position, the supply channel (430) is open to the receiving channel (440) via the valve chamber (500), and the vent valve seat (300) is closed.

3. Valve apparatus according to claim 1 or claim 2, characterized in that - the housing body (101) comprises a wall (140) which surrounds the valve chamber (500), the diffuser channel (111, 112) running inside the wall so that the diffuser (110) is integrated in the housing body (101).

4. Valve apparatus according to one of the preceding claims, characterized in that - the vent valve seat (300) comprises a vent valve seat passage (310) having a first clearance (311) and a vent valve seat outlet (312) having a second clearance, - the vent valve seat (300) having the vent valve seat passage (310) and the vent valve seat outlet (312) which have the first and the second clearance (311) thereof, respectively, the first and the second clearance (311) thereof being larger than a nominal aeration width of the supply channel (430).

5. Valve apparatus according to one of the preceding claims, characterized in that a first clearance (131, 132) of the diffuser channel (111, 112) adjacent to the vent valve seat outlet (312) is smaller than the second clearance (133, 134) of the diffuser channel (111, 112) adjacent to the first outlet (161, 162) of the vent channel (160).

6. Valve apparatus according to one of the preceding claims, characterized in that in the diffuser channel (111, 112), - opposite the vent valve seat passage (310), an inner wall of the diffuser channel is formed as the flow baffle element (620).

7. Valve apparatus according to one of claims 1 to 6, characterized in that a flow baffle element (620) comprises a flow edge, in particular a flow tip or a flow web, directed against a vent direction and towards the vent valve seat (300).

8. Valve apparatus according to one of the preceding claims, characterized in that the housing body (101) comprises an upper sealing groove (151) and a lower sealing groove (152) on the outside, the diffuser (110) adjoining in a plane between the upper and lower sealing groove (151, 152).

9. Valve apparatus according to one of the preceding claims, characterized in that the diffuser channel (111, 112) comprises the second portion which has the curved form in the shape of a horn.

10. Valve apparatus according to one of the preceding claims, characterized in that the valve chamber (500) runs along the valve axis (A1) and the diffuser channel (160) runs radially with segments aligned perpendicular to the valve axis.

11. Valve apparatus according to one of claims 1 to 10, characterized in that the diffuser comprises at least a first radially aligned diffuser channel (111, 112) along a first diffuser angle (121), namely a first radially aligned diffuser channel (111) along a first diffuser angle (121) and a second radially aligned diffuser channel (112) along a second diffuser angle (122), the first and second diffuser channel (111, 112) preferably being opposite one another symmetrically to the valve axis (A1).

12. Valve apparatus according to one of claims 1 to 10, characterized in that the diffuser channel (111, 112) is arranged in a ring shape around the valve axis (A1).

13. Valve apparatus according to one of the preceding claims, characterized in that - a first region of the vent channel (160) forms the diffuser (110) from at least one diffuser channel (111, 112) which widens in cross-section, starting from the valve axis (A1), towards the second clearance (133, 134) of the diffuser channel (111, 112), the cross-section of the diffuser channel (111, 112) widening along a diffuser angle (121, 122), and - a second region of the vent channel (160) directly adjoining the diffuser (110) within the vent channel (160), which second region, as a cylindrical vent channel outlet (161, 162), has the second clearance (133, 134) of the diffuser channel (111, 112) and is radially delimited by a wall (140) of the housing body (101).

14. System (800) consisting of a pneumatic cylinder (700) for a compressed air device, in particular for a transmission brake (900), and a pneumatic valve apparatus according to one of claims 1 to 13 comprising a pneumatic solenoid valve (10) having a housing body (101) which has a supply channel (430), a receiving channel (440) and a vent channel (160), the supply channel (430) of the pneumatic solenoid valve (10) being connected to a pressure chamber of the pneumatic cylinder (700) for venting and aerating using compressed air, in particular for venting in the first position (E) of the valve body of the solenoid valve (10) and for aerating in the second position (V) of the valve body of the solenoid valve (10).

15. Transmission control or clutch system (1000) comprising a pneumatic valve apparatus (100) according to one of claims 1 to 13 or a system according to claim 14.