DE102013211900A1 - Piston valve and valve piston for a piston valve - Google Patents

Piston valve and valve piston for a piston valve

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Publication number
DE102013211900A1
DE102013211900A1 DE102013211900.3A DE102013211900A DE102013211900A1 DE 102013211900 A1 DE102013211900 A1 DE 102013211900A1 DE 102013211900 A DE102013211900 A DE 102013211900A DE 102013211900 A1 DE102013211900 A1 DE 102013211900A1
Authority
DE
Germany
Prior art keywords
piston
valve
switching position
wall
sleeve
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.)
Pending
Application number
DE102013211900.3A
Other languages
German (de)
Inventor
Nenad Mandic
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Priority to DE102013211900.3A priority Critical patent/DE102013211900A1/en
Publication of DE102013211900A1 publication Critical patent/DE102013211900A1/en
Application status is Pending legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0446Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces
    • F16K17/046Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces the valve being of the gate valve type or the sliding valve type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE 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
    • B60T10/00Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope
    • B60T10/02Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope with hydrodynamic brake
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D57/00Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
    • F16D57/04Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders with blades causing a directed flow, e.g. Föttinger type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00Check valves
    • F16K15/02Check valves with guided rigid valve members
    • F16K15/025Check valves with guided rigid valve members the valve being loaded by a helicoidal spring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/26Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
    • F16K3/265Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member with a sleeve sliding in the direction of the flow line
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/44Mechanical actuating means
    • F16K31/53Mechanical actuating means with toothed gearing

Abstract

Piston valve (1), with a in a guide (2) and opposite the guide (2) displaceable valve piston (3) which controls depending on its switching position, a flow of a medium through the piston valve or regulates, wherein the valve piston (3) as formed by the medium flow-through hollow member having a sleeve-like wall (4) and an end wall (5), wherein in the sleeve-like wall (4) at least one recess (6) is introduced, which in a first switching position of the valve piston (3) closed and is open in a second switching position of the valve piston (3).

Description

  • The invention relates to a piston valve according to the preamble of claim 1. Furthermore, the invention relates to a Ventilkoben for a piston valve and a hydrodynamic brake of a motor vehicle with such a piston valve.
  • In a variety of automotive applications, the flow of a medium, such as the flow of hydraulic oil, must be controlled. In a hydrodynamic brake, depending on the oil pumping capacity, either the hydraulic oil pressure and volumetric flow provided by the retarder must be assisted by emptying an oil reservoir or, if the oil pumping power is capable of providing a sufficiently high hydraulic oil pressure and volumetric flow, the oil reservoir will be additionally filled , For controlling or regulating the flow of a medium valves are used.
  • A designed as a piston valve valve has, as a valve body which controls the flow of the medium through the piston valve depending on its switching position, a valve piston. In particular, when such a piston valve for controlling or regulating the flow of a medium through lines with large flow cross sections is used, also the valve piston has large dimensions and therefore according to the prior art over a relatively high weight and therefore a high inertia. Such piston valves then have a relatively poor response, since in the transfer of the valve piston between its switching positions of the inertia of the same must be overcome.
  • The DE 10 2007 047 902 A1 discloses a piston valve with a guide providing body of two part bodies, in which a valve piston against the spring force of a spring element is displaced. Depending on the switching position of the valve piston, the flow of a medium is controlled or regulated by the guidance of the piston valve.
  • On this basis, the present invention is based on the object to provide a novel piston valve and a Ventilkoben for a piston valve and a hydrodynamic brake with such a piston valve.
  • This object is achieved by a method according to claim 1. According to the invention, the valve piston is designed as a hollow component through which the medium can flow with a sleeve-like wall and an end wall, wherein at least one recess is introduced into the sleeve-like wall, which is closed in a first switching position of the valve piston and open in a second switching position of the valve piston.
  • Due to the fact that in the piston valve according to the invention the valve piston is designed as a hollow component through which the medium to be controlled or regulated is to be controlled, the valve piston has a relatively low weight and thus a relatively low mass inertia even with large dimensions. As a result, the known from practice delays in the response of the piston valve can be largely eliminated. In the sleeve-like wall of the valve piston designed as a hollow member at least one recess is introduced, which is closed in the first switching position of the valve piston and open in the second switching position of the valve piston.
  • Preferably, an outer circumferential surface of the sleeve-like wall cooperates with a corresponding sealing surface of the guide such that in the first switching position of the valve piston, the sealing surface of the guide closes the or each recess in the sleeve-like wall, and in the second switching position of the valve piston, the sealing surface of the guide the or each recess in the sleeve-like wall releases. The sealing function in the first switching position of the valve piston is thus provided by the interaction between the sealing surface of the guide and the outer surface of the sleeve-like wall of the valve piston, wherein the sealing surface of the guide in the first switching position of the valve piston or each recess in the sleeve-like wall of the valve piston covers. Preferably, a tight clearance fit is formed or adjusted between the sealing surface of the guide and the outer circumferential surface of the sleeve-like wall of the valve piston.
  • According to a further development, the valve piston at one end opposite the end wall a radially outwardly directed collar, which is supported on a first variant of the collar, a spring element which presses the valve piston in the first switching position, and wherein a second variant of the Collar is formed a thread on which a servomotor for adjusting the valve piston engages between its switching positions. Hereby the functional integration can be increased. For functional and / or weight optimization, the collar can be provided with recesses.
  • According to an alternative development, at least one control panel is introduced into the end wall, which is open independently of the switching position of the valve piston, wherein the or each control panel relative to the or each recess has a relatively small flow cross-section. Preferably, a piston valve is formed with such a valve piston as a shuttle valve, which in the first switching position a relatively small flow in a first flow direction through the or each control panel and in the second switching position a relatively large flow in a direction opposite to the first flow direction second flow direction through the or every recess allows. The embodiment of the piston valve according to the invention as a shuttle valve with at least one control panel in the end wall of the valve piston is preferred. Such a shuttle valve is advantageously suitable for use in a hydrodynamic brake of a motor vehicle.
  • Preferably, a plurality of recesses are introduced into the sleeve-like wall, which are distributed uniformly on the circumference of the sleeve-like wall. Hereby, the flow through the valve piston in the second switching position of the same can be optimally adjusted.
  • The valve piston according to the invention is defined in claim 9 and the hydrodynamic brake according to the invention is defined in claim 11.
  • Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:
  • 1 a schematic perspective view of a first piston valve according to the invention in a first switching position thereof;
  • 2 a cross section through 1 ;
  • 3 a schematic perspective view of the piston valve of 1 in a second switching position thereof;
  • 4 a cross section through 3 ;
  • 5 a valve piston of the piston valve of 1 to 4 in solo representation;
  • 6 an alternative valve piston of the spool valve in isolation;
  • 7 a schematic perspective view of a second piston valve according to the invention in a first switching position thereof;
  • 8th a cross section through 7 ;
  • 9 a schematic perspective view of a third piston valve according to the invention in a first switching position thereof;
  • 10 a cross section through 9 ;
  • 11 a schematic perspective view of a fourth piston valve according to the invention in a first switching position thereof;
  • 12 a cross section through 11 ;
  • 13 a schematic perspective view of a fifth piston valve according to the invention in a first switching position thereof when using the same in connection with a hydrodynamic brake;
  • 14 a schematic perspective view of the piston valve of 13 in a second switching position thereof; and
  • 15 a valve piston of the piston valve of 13 and 14 in solo representation.
  • 1 to 4 show different schematized views of a piston valve according to the invention 1 according to a first embodiment of the invention, wherein 1 and 2 the piston valve 1 in a first switching position and 3 and 4 the piston valve 1 show in a second switching position.
  • The piston valve according to the invention 1 has a leadership 2 , which is, for example, a housing of the piston valve 1 can act, being in the lead 2 of the piston valve 1 a valve piston 3 taken up and opposite the leadership 2 is displaced by the displacement of the valve piston 3 towards the leadership 2 the valve piston 3 and ultimately the piston valve 1 to transfer between its different switching positions. Depending on the switching position of the valve piston 3 in the lead 2 it controls a flow of a medium, for example a flow of hydraulic oil, through the piston valve 1 , In 5 is the valve piston 3 of the piston valve 1 of the 1 to 4 shown in solo view.
  • The valve piston 3 of the piston valve 1 is as can be controlled by the medium to be controlled or regulated hollow member having a sleeve-like wall 4 and a front wall 5 educated. In the sleeve-like wall 4 is at least one recess 6 introduced, in the first switching position of the valve piston 3 (please refer 1 and 2 ) is closed, and in the second switching position of the valve piston 3 (please refer 3 and 4 ) is open. In the embodiment shown are in the sleeve-like wall 4 of the valve piston 3 several recesses 6 placed on the circumference of the sleeve-like wall 4 are equally distributed, so as to the second switching position of the valve piston 3 (please refer 3 and 4 ) an optimum flow through the valve piston designed as a hollow component 3 to enable.
  • In the embodiment of 1 to 5 are the recesses 6 in the sleeve-like wall 4 of the valve piston 3 each executed as a circular recesses. It may deviate from other geometric contours of the recesses 6 be used.
  • As 2 to 4 can be removed, an outer surface acts 7 the sleeve-like wall 4 of the valve piston 3 with a corresponding sealing surface 8th the leadership 2 together so that in the first switching position of the valve piston 3 (please refer 1 . 2 ) the sealing surface 8th the leadership 2 the or each recess 6 in the sleeve-like wall 4 of the valve piston 3 closes or covers, whereas in the second switching position of the valve piston 3 (please refer 3 . 4 ) the sealing surface 8th the leadership 2 the or each recess 6 the sleeve-like wall 4 of the valve piston 3 releases.
  • At the in 1 to 4 shown piston valve 1 it is pressure-controlled piston valve.
  • Then, if like in 2 shown, the pressure Px on a first side of the valve piston 3 greater than the pressure Py on a second side of the valve piston 3 is, the valve piston 3 based on this pressure gradient against a stop 9 pressed, in which case the valve piston 3 in the 1 and 2 shown first switching position occupies, in which the recesses 6 are closed.
  • Then, on the other hand, if the pressure Py according to 4 greater than the pressure Px is, the valve piston 3 from the in 2 shown first switching position out in the in 4 shifted shown second switching position, in which case the recesses 6 in the sleeve-like wall 4 of the valve piston 3 are released. In the switching position of 4 is the valve piston 3 from the stop 9 lifted.
  • As 1 to 4 can be removed, is on one of the front side 5 opposite end of the valve piston 3 on the same a radially outwardly directed collar 10 formed, on the one hand in the first switching position of 1 and 2 and on the other hand in the second switching position of 3 and 4 the relative position of the valve piston 3 to the leadership 2 Are defined. So comes in the first switching position of 1 and 2 the collar 10 at the stop 9 to the plant, whereas in the switching position of 3 and 4 the collar 10 at one of the leadership 2 provided plot 11 comes to the plant.
  • As already stated, the valve piston 3 of the piston valve 1 designed as a hollow component, which at least in the second switching position of the valve piston 3 or piston valve 1 is flowed through by the medium to be controlled or regulated.
  • Such a hollow component can be inexpensively formed as a deep-drawn component. Such a hollow component has a low weight and thus a low mass inertia, so that the piston valve according to the invention 1 has a good response.
  • The design of the piston valve according to the invention 1 is simple and compact. The flow of the medium through the piston valve 1 is in the second switching position of the valve piston 3 not disabled.
  • A second embodiment of a piston valve according to the invention 1 demonstrate 7 and 8th , wherein the embodiment of the 7 and 8th from the embodiment of 1 to 4 only differs in that in the embodiment of the 7 and 8th in addition a spring element 12 is present, which on the one hand on the collar 10 the valve sleeve 3 and on the other hand at the stop 11 the leadership 2 supported. The spring element 12 pushes the valve piston 3 in the in 1 and 2 shown first switching position against the stop 9 , To transfer the piston valve 1 of the 7 and 8th in a second switching position, that of the spring element 12 provided spring force to be overcome.
  • Another embodiment of a piston valve according to the invention 1 with a spring element 12 , whose spring force the valve piston 3 presses in the first switching position is in 9 and 10 shown. While in the embodiment of 7 and 8th the valve piston 3 in a hole of the guide 2 is guided in is 9 and 10 the valve piston 3 on a lead 13 the leadership 2 guided.
  • With regard to the design of the valve piston 3 However, the embodiment of the 7 and 8th and the embodiment of the 9 and 10 with the examples of 1 to 4 match, so that reference can be made to the above statements.
  • Another embodiment of a piston valve according to the invention 1 demonstrate 11 and 12 , In 11 and 12 is at the collar 10 of valve piston 3 a thread 14 formed, on which a servomotor 15 about a mating thread 16 bearing wave 17 attacks the valve piston 3 of the piston valve 1 of the embodiment of 11 and 12 controlled or regulated by means of the servomotor 15 to transfer between its switching positions. In the embodiment of 11 and 12 is on the spring element 12 the embodiments of the 7 . 8th as well as the 9 . 10 waived. Likewise, the stop 9 omitted.
  • With regard to the design of the valve piston 3 However, the embodiment of the 11 and 12 with the embodiment of 1 to 4 match, so that reference is made to the above statements. 6 shows the valve piston 3 of the embodiment of 11 and 12 in solo representation.
  • Another piston valve 1 with a valve piston designed according to the invention 3 is in the embodiment of 13 to 15 shown, wherein the embodiment of the 13 to 15 essentially differs from the embodiments described above in that on the one hand the recesses 6 in the sleeve-like wall 4 of the valve piston 3 not circular in cross-section, but rather elongated or oval are executed, and that also in the front wall 5 of the valve piston 3 Recesses are introduced, namely in the embodiment shown two control panels 18 , The collar 10 of the valve piston 3 is here with recesses 23 Mistake.
  • Then, if in the front wall 5 of the valve piston 3 such control panels 18 are introduced, it is the piston valve according to the invention 1 to a so-called shuttle valve, which in the first switching position (see 13 ) a relatively small flow exclusively through the or each control panel 18 in a first flow direction and in the second switching position (see 14 ) a relatively large flow in a direction opposite to the first flow direction second flow direction additionally through the or each recess 6 allows. The control panels 18 accordingly, stand alone and in total opposite the recesses 6 over a relatively small flow cross-section.
  • 13 and 14 show a trained as a shuttle valve piston valve 1 in the preferred application in a hydrodynamic brake of a motor vehicle, according to 13 and 14 the leadership 2 of the valve piston 1 from a neck 19 an oil reservoir 20 the hydrodynamic brake is provided, wherein the oil reservoir 20 over the shuttle valve 1 to a hydraulic control circuit 21 the hydrodynamic brake via a flow tube 22 is connected.
  • Then, when an unillustrated retarder of the hydrodynamic brake is running and the oil pumping performance alone is a sufficiently high hydraulic pressure in the hydraulic control circuit 21 can provide the hydrodynamic brake, takes the shuttle valve 1 in the 13 shown first switching position 1 in which the recesses 6 in the sleeve-like wall 4 of the valve piston 3 are closed, in which case the oil reservoir 20 starting from the hydraulic control circuit 21 over the control panels 18 in the front wall 5 of the valve piston 3 can be filled. In the 13 flow arrows visualize the filling of the oil reservoir 20 starting from the hydraulic control circuit 21 over the control panels 18 ,
  • Then, however, when the retarder is switched on and when starting or running up the oil pump power still insufficient hydraulic pressure and oil flow rate in the hydraulic control circuit 21 can provide the hydrodynamic brake, by emptying the oil reservoir 20 the retarder in providing the hydraulic pressure and oil flow rate for the hydraulic control circuit 21 be supported, in which case the shuttle valve 1 in the 14 shown second switching position occupies, then the oil reservoir 20 in the hydraulic control circuit 21 to empty into it, through the recesses 6 in the sleeve-like wall 4 of the control piston 3 ,
  • All embodiments have in common that a trained as a hollow component valve piston 3 is used in at least one switching position of the piston valve 1 is flowed through by the medium to be controlled or regulated.
  • This valve piston 3 Can be easily and inexpensively made of sheet metal in a deep-drawing process and has a low weight. Therefore, a piston valve 1 be provided with a simple, compact design and good response.
  • Through a relatively tight clearance between the sleeve-like wall 4 of the valve piston 3 and the leadership 2 for the valve piston 3 can in the first switching position, the sealing function for the recesses 6 easy to set.
  • Then, if in addition in the front wall 5 of the valve piston 3 control aperture 18 are introduced, a shuttle valve can be provided.
  • Then, if the piston valve 1 the second switching position occupies, in which the recesses 6 in the sleeve-like wall 4 of the valve piston 3 are released, the flow through the piston valve 1 , in particular the valve piston 3 same, not handicapped.
  • LIST OF REFERENCE NUMBERS
  • 1
    piston valve
    2
    guide
    3
    plunger
    4
    sleeve-like wall
    5
    bulkhead
    6
    recess
    7
    lateral surface
    8th
    you face
    9
    attack
    10
    collar
    11
    attack
    12
    spring element
    13
    head Start
    14
    thread
    15
    servomotor
    16
    mating thread
    17
    wave
    18
    control panel
    19
    Support
    20
    oil storage
    21
    hydraulic control circuit
    22
    flow tube
    23
    recesses
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • DE 102007047902 A1 [0004]

Claims (11)

  1. Piston valve ( 1 ), with one in a leadership ( 2 ) and to the leadership ( 2 ) displaceable valve piston ( 3 ), which controls, depending on its switching position, a flow of a medium through the piston valve, characterized in that the valve piston ( 3 ) as permeable by the medium hollow member with a sleeve-like wall ( 4 ) and an end wall ( 5 ) is formed, wherein in the sleeve-like wall ( 4 ) at least one recess ( 6 ) is introduced, which in a first switching position of the valve piston ( 3 ) and in a second switching position of the valve piston ( 3 ) is open.
  2. Piston valve according to claim 1, characterized in that an outer lateral surface ( 7 ) of the sleeve-like wall ( 4 ) with a corresponding sealing surface ( 8th ) the leadership ( 2 ) cooperates in such a way that in the first switching position of the valve piston ( 3 ) the sealing surface ( 8th ) the leadership ( 3 ) the or each recess ( 6 ) in the sleeve-like wall ( 4 ), and in the second switching position of the valve piston ( 3 ) the sealing surface ( 8th ) the leadership ( 3 ) the or each recess ( 6 ) in the sleeve-like wall ( 4 ) releases.
  3. Piston valve according to claim 1 or 2, characterized in that in the sleeve-like wall ( 4 ) several recesses ( 6 ) are introduced, which at the periphery of the sleeve-like wall ( 4 ) are equally distributed.
  4. Piston valve according to one of claims 1 to 3, characterized in that the valve piston ( 3 ) on one of the end wall ( 5 ) opposite end a radially outwardly directed collar ( 10 ) having.
  5. Piston valve according to claim 4, characterized in that on the collar ( 10 ) a spring element ( 12 ), which supports the valve piston ( 3 ) presses in the first switching position.
  6. Piston valve according to claim 4, characterized in that on the collar ( 10 ) a thread ( 14 ) is formed, on which a servomotor ( 15 ) for adjusting the valve piston ( 3 ) attacks between its switching positions.
  7. Piston valve according to one of claims 1 to 6, characterized in that in the end wall ( 5 ) at least one control panel ( 18 ) is introduced, which is independent of the switching position of the valve piston ( 3 ) is open, with the or each control panel ( 18 ) relative to the or each recess ( 6 ) has a relatively small flow area.
  8. Piston valve according to claim 7, characterized in that it is designed as a shuttle valve, which in the first switching position, a relatively small flow in a first flow direction through the or each control panel ( 18 ) and in the second switching position, a relatively large flow in a direction opposite to the first flow direction of the second flow direction through the or each recess ( 6 ) allows.
  9. Valve piston ( 3 ) for a piston valve which controls or regulates a flow of a medium through the piston valve depending on its switching position, characterized in that the same as through-flow hollow member with a sleeve-like wall ( 4 ) and an end wall ( 5 ) is formed, wherein in the sleeve-like wall ( 4 ) at least one recess ( 6 ) is introduced, which in a first switching position of the valve piston ( 3 ) and in a second switching position of the valve piston ( 3 ) is open.
  10. Valve piston according to claim 9, characterized in that the same is formed according to one of claims 2 to 8.
  11. Hydrodynamic brake of a motor vehicle, with a retarder, an oil reservoir, a hydraulic control circuit and a connected between the oil reservoir and the hydraulic control piston valve, wherein in a first switching position of the piston valve, the oil reservoir can be filled and in a second switching position of the piston valve at or immediately after switching the retarder of the oil reservoir for increasing the oil volume flow for the retarder is emptied, characterized in that the piston valve is designed according to claim 8.
DE102013211900.3A 2013-06-24 2013-06-24 Piston valve and valve piston for a piston valve Pending DE102013211900A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102013211900.3A DE102013211900A1 (en) 2013-06-24 2013-06-24 Piston valve and valve piston for a piston valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013211900.3A DE102013211900A1 (en) 2013-06-24 2013-06-24 Piston valve and valve piston for a piston valve

Publications (1)

Publication Number Publication Date
DE102013211900A1 true DE102013211900A1 (en) 2014-12-24

Family

ID=52010460

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102013211900.3A Pending DE102013211900A1 (en) 2013-06-24 2013-06-24 Piston valve and valve piston for a piston valve

Country Status (1)

Country Link
DE (1) DE102013211900A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2206356A (en) * 1936-10-13 1940-07-02 Walter B Hutchings Check valve
US2918083A (en) * 1954-06-07 1959-12-22 James Pond Clark Check valve and cage construction
DE2736076A1 (en) * 1977-08-10 1979-02-15 Kraftwerk Union Ag Return valve with daempfungseinrichtung
US20010027773A1 (en) * 1999-12-20 2001-10-11 Robb Janak Method and apparatus for hydraulic clip and reset of engine brake systems utilizing lost motion
DE10350022A1 (en) * 2002-10-30 2004-05-19 Caterpillar Inc., Peoria The engine braking system
DE102007047902A1 (en) 2006-12-20 2008-07-03 Denso Corp., Kariya piston valve
DE102007033146A1 (en) * 2007-07-13 2009-01-15 Schwäbische Hüttenwerke Automotive GmbH & Co. KG Adjustment valve for adjusting the delivery volume of a positive displacement pump

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2206356A (en) * 1936-10-13 1940-07-02 Walter B Hutchings Check valve
US2918083A (en) * 1954-06-07 1959-12-22 James Pond Clark Check valve and cage construction
DE2736076A1 (en) * 1977-08-10 1979-02-15 Kraftwerk Union Ag Return valve with daempfungseinrichtung
US20010027773A1 (en) * 1999-12-20 2001-10-11 Robb Janak Method and apparatus for hydraulic clip and reset of engine brake systems utilizing lost motion
DE10350022A1 (en) * 2002-10-30 2004-05-19 Caterpillar Inc., Peoria The engine braking system
DE102007047902A1 (en) 2006-12-20 2008-07-03 Denso Corp., Kariya piston valve
DE102007033146A1 (en) * 2007-07-13 2009-01-15 Schwäbische Hüttenwerke Automotive GmbH & Co. KG Adjustment valve for adjusting the delivery volume of a positive displacement pump

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