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WO2020048697A1 - Dispositif à piston pour un modulateur électropneumatique pour un véhicule, système de piston, modulateur et procédé de fabrication d'un dispositif à piston - Google Patents

Dispositif à piston pour un modulateur électropneumatique pour un véhicule, système de piston, modulateur et procédé de fabrication d'un dispositif à piston Download PDF

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Publication number
WO2020048697A1
WO2020048697A1 PCT/EP2019/070876 EP2019070876W WO2020048697A1 WO 2020048697 A1 WO2020048697 A1 WO 2020048697A1 EP 2019070876 W EP2019070876 W EP 2019070876W WO 2020048697 A1 WO2020048697 A1 WO 2020048697A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
housing
piston element
region
piston device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2019/070876
Other languages
German (de)
English (en)
Inventor
Friedbert Röther
Martin Krahl
Michael GIANNUZZI
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.)
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
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 Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH filed Critical Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Publication of WO2020048697A1 publication Critical patent/WO2020048697A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/26—Compressed-air systems
    • B60T13/38—Brakes applied by springs or weights and released by compressed air
    • B60T13/385—Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
    • B60T15/02—Application and release valves
    • B60T15/36—Other control devices or valves characterised by definite functions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
    • B60T8/3255—Systems in which the braking action is dependent on brake pedal data
    • B60T8/327—Pneumatic systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/02—Fluid-pressure mechanisms
    • F16D2125/08—Seals, e.g. piston seals

Definitions

  • the present approach relates to a piston device for a
  • electropneumatic modulator for a vehicle, a piston system with a
  • Piston housing and a piston device an electropneumatic modulator and a method for producing a piston device.
  • Piston systems in electropneumatic modulators have a piston housing, one accommodated in the piston housing and one in the piston housing
  • DE 101 33440 A1 describes a brake system with an electropneumatic modulator for providing a brake pressure for a brake cylinder of the
  • the object of the present approach is an improved piston device for an electropneumatic modulator for a vehicle, a piston system with a piston housing and an improved piston device, an improved electropneumatic modulator and a method for
  • a piston device for an electropneumatic modulator for a vehicle a piston system with a piston housing and a piston device, an electropneumatic modulator and a method for producing a piston device according to the main claims.
  • a piston device according to the approach presented here has the advantage that one or more sealing elements can be assembled very easily and after assembly are still recorded safely.
  • the piston device has the advantage that one or more sealing elements can be assembled very easily and after assembly are still recorded safely.
  • the piston device has the advantage that one or more sealing elements can be assembled very easily and after assembly are still recorded safely.
  • a piston device for an electropneumatic modulator for a vehicle has a first piston element, a second piston element and at least one
  • the first piston element is designed to be arranged in a piston housing.
  • the second piston element is also designed to be arranged in the piston housing and is coupled to the first piston element in an assembled state. In the assembled state, the sealing element is arranged between the first piston element and the second piston element in order to seal a first region of the piston housing adjacent to the first piston element from a second region of the piston housing opposite the first region and adjacent to the second piston element when the piston device in the
  • Piston housing is arranged.
  • the vehicle can be a commercial vehicle or a vehicle
  • the vehicle can be an electropneumatic
  • the piston device can be a linearly movable reciprocating piston in the piston housing, or in other words. Such a piston is also referred to as a relay piston.
  • the piston device can have an axial opening or through opening into which, in the assembled state of the piston device, a centering element for guiding a linear movement of the
  • Piston device can be inserted.
  • the piston device can be shaped for use in or with an electropneumatic modulator for a vehicle.
  • the sealing element can be arranged between a surface of the first piston element and a main surface of the second piston element.
  • a main surface is to be understood as a surface that is the largest surface compared to other possible surfaces of an element.
  • the sealing element can be in contact with both the first piston element and the second piston element in the assembled state.
  • the assembled state is said to be an operational state of the piston device
  • Sealing element is arranged between the first piston element and the second piston element.
  • the sealing element can be placed between the first piston element and the second piston element, or it can be arranged or injection molded or injected.
  • a sealing element arranged in this way between the first piston element and the second piston element, which is also referred to as a piston seal, can advantageously be arranged on the piston device so that it does not slip.
  • the first area of the piston housing can also be referred to as the working chamber and the second area of the piston housing can also be referred to as the control chamber.
  • the first piston element and the second piston element can be detachably coupled to one another in the assembled state. So the sealing element can be easily replaced.
  • the first piston element can be at least one
  • Fastening element can be positively and additionally or alternatively positively coupled or coupled to the second piston element. Subsequent replacement of the sealing element can thereby be facilitated, for example.
  • Piston element can be coupled or coupled to one another by means of a bayonet connection and additionally or alternatively by a snap lock.
  • Bayonet connection can enable a detachable connection.
  • Snap lock can allow a permanent, i.e. non-detachable or detachable connection.
  • first piston element can be integrally coupled or coupled to the second piston element.
  • a material connection for example a weld, can enable a particularly stable connection.
  • Piston element with the first piston element is coupled or can be coupled, in the middle be arranged on or through a main surface of the second piston element. This enables a force-free transfer of force between the two piston elements.
  • the first piston element has a cutout for the sealing element.
  • This cutout can be integrally formed in an outer wall and additionally or alternatively an upper side of the first piston element facing the second piston element in the assembled state.
  • a cross section of the recess can be concave or L-shaped.
  • a sealing element in the form of an O-ring can advantageously be arranged in such a recess.
  • the O-ring can be on or around a center in the circumferential
  • the O-ring can be placed on a shoulder formed on the base of the elevation. This creates a form-safe arrangement of the sealing element on the first piston element.
  • the second piston element can have an annular shape. This saves material for the second piston element.
  • the second piston element In the assembled state, the second piston element can be coupled to the first piston element on an elevation surface of said elevation of the first piston element.
  • Piston element can protrude from the elevation surface in order to hold the received sealing element.
  • Piston element can be larger than a second volume of the second
  • an outer diameter of the sealing element essentially corresponds to one, that is to say that an adequate seal is achieved
  • Piston device be thought to run. As long as the piston device is not arranged in the piston housing, the piston device is not arranged in the piston housing, the piston device is not arranged in the piston housing, the piston device is not arranged in the piston housing, the piston device is not arranged in the piston housing, the piston device is not arranged in the piston housing, the piston device is not arranged in the piston housing, the piston device is not arranged in the piston housing, the piston device is not arranged in the piston housing.
  • Outside diameter of the sealing element may be larger than the outside diameter of the first piston element and additionally or alternatively the outer diameter of the second piston element and additionally or alternatively the inner diameter of the piston housing. This can ensure that there is a gap between the
  • Piston device and the piston housing is sealed by the sealing element when the piston device is arranged in the piston housing.
  • the piston device can have at least one other
  • the first piston element can also have a further recess for the further sealing element. This cutout can be formed all the way round into an inner wall of the first piston element and additionally or alternatively the upper side of the first piston element facing the second piston element in the assembled state.
  • the further sealing element can thus also be arranged between the first piston element and the second piston element in the assembled state. If the piston device is arranged in the piston housing in the operational state, the first piston element can be on a pin-shaped or sleeve-shaped
  • Centering element of the piston housing can be arranged guided.
  • the further sealing element allows one between the centering element and the first
  • Piston element located gap are sealed.
  • Has piston passage opening which extends in the assembled state through the first piston element and the second piston element in order to fluidly connect the first region to the second region.
  • Piston device in the piston housing can thus enable pressure equalization between the first region and the second region.
  • Piston passage opening can be used as a throttle.
  • the first piston element can have at least one first
  • the second piston element can have at least one second through opening in order to fluidly connect the second region to the intermediate volume space in the assembled state.
  • Pressure equalization can be controlled through such an intermediate volume space.
  • the intermediate volume space can represent a timing element.
  • a speed of pressure equalization can be determined by a size of the
  • Intermediate volume space can be determined.
  • a volume or diameter of the intermediate volume space can therefore advantageously be larger than a volume or diameter of the first through opening and additionally or alternatively a volume or a width of the second through opening.
  • a piston system has a piston housing and one in the piston housing
  • piston device which is formed in one of the variants described above.
  • a piston system is suitable for use with or in an electropneumatic modulator.
  • the piston system is
  • the piston housing can be tubular, for example with a circumferential or uniform tubular inner tube wall.
  • a recess or groove for the sealing element is advantageously not necessary in the piston housing.
  • Such a piston system shows little wear during operation.
  • An electropneumatic modulator for a vehicle has a control input for receiving a control signal, a supply connection for supplying compressed air, a brake output for outputting a brake pressure and the like
  • Piston system which is connected between the supply port and the brake output, with a piston position of the piston device within the
  • Piston housing is controllable by the control signal to provide the brake pressure using the compressed air.
  • a method for manufacturing a piston device for an electropneumatic modulator for a vehicle has a step of providing, a step of coupling and a step of arranging.
  • a First piston element which is designed to be arranged in a piston housing and a second piston element, which is designed to be arranged in the piston housing.
  • the first piston element is coupled to the second piston element.
  • at least one sealing element is arranged between the first piston element and the second piston element, around a first region of the piston housing which is adjacent to the first piston element and opposite a region of the first region and the second region
  • the arranging step can be carried out before or after the coupling step.
  • Fig. 1 is a schematic representation of a vehicle with an electropneumatic modulator with a piston system with a piston device according to a
  • FIG. 2 shows a schematic cross-sectional illustration of one half of a piston device according to an exemplary embodiment
  • FIG. 3 shows a schematic illustration of a throttle of a piston device according to an exemplary embodiment
  • FIG. 4 shows a schematic illustration of two throttles of a piston device according to one exemplary embodiment
  • Fig. 5 is a schematic cross-sectional view of an electropneumatic
  • Embodiment; and 6 shows a flowchart of a method for producing a piston device according to an exemplary embodiment.
  • FIG. 1 shows a schematic illustration of a vehicle 100 with a
  • vehicle 100 is a commercial vehicle, for example a truck.
  • the electropneumatic modulator 105 is part of a brake system of the vehicle 100.
  • the electropneumatic modulator 105 comprises a piston system 110 with a piston device 115 and a piston housing 120.
  • the piston housing 120 is, for example, by
  • Parts of a housing of the electropneumatic modulator 105 are formed. According to this exemplary embodiment, only one half of the piston system 110 is shown. As indicated by an axis of symmetry 122, an opposite half of the piston system 110, not shown, can be mirror-inverted
  • the piston device 115 has a first piston element 125, a second
  • the piston device 115 is shown in an assembled state in which the first piston element 125, the second piston element 130 and the sealing element 135 form a piston
  • the sealing element 135 is arranged between the first piston element 125 and the second piston element 130, in order to surround a first region 140 of the first piston element 125
  • Piston housing 120 opposite a second region 145 of the first region 140 and adjacent to the second piston element 130
  • Piston housing 120 is arranged, as shown in Fig. 1.
  • the piston device 115 also has a further sealing element 146.
  • the first piston element 125 and the second piston element 130 are detachably coupled to one another.
  • the first piston element 125 according to this exemplary embodiment is coupled to the second piston element 130 by means of at least one fastening element.
  • the fastening element is designed, for example, as a screw or clip. According to one
  • Exemplary embodiments are the first piston element 125 and the second piston element 130 additionally or alternatively by means of a bayonet connection and / or one
  • the first piston element 125 is additionally or alternatively cohesively coupled, for example glued or welded, to the second piston element 130.
  • the first piston element 125 has a
  • the recess 150 is formed all around into an outer wall 152 and an upper side of the first piston element 125 facing the second piston element 130 in the assembled state.
  • a cross section of the recess 150 shown here is L-shaped in accordance with this exemplary embodiment.
  • the sealing element 135 is shaped in the form of an O-ring and is arranged or fitted around an elevation 155 of the first piston element 125 which is formed centrally in the circumferential recess 150.
  • the elevation 155 is cone-shaped.
  • the sealing element 135 has another suitable shape, for example with at least one sealing lip.
  • the further ring-shaped sealing element 146 is arranged parallel to the ring-shaped sealing element 135, which is shaped the same or differently than the sealing element 135.
  • An outer diameter of the further sealing element 146 is smaller than the outer diameter of the sealing element 135.
  • piston element 125 has a further cutout 156, in which the further sealing element 145 is arranged.
  • This further recess is integrally formed in an inner wall 157 of the first piston element 125 arranged opposite the outer wall 152 and additionally or alternatively in the upper side of the first piston element 125 facing the second piston element 130 in the assembled state.
  • the further sealing element 146 is also arranged or clamped in the assembled state between the first piston element 125 and the second piston element 130.
  • the piston housing 120 shapes according to this
  • Embodiment a centering element 159 in the form of a sleeve.
  • piston device 115 is arranged in piston housing 120, inner wall 157 being arranged all around centering element 159.
  • the further sealing element 146 is designed to also seal the working chamber and the control chamber from one another on the side of the centering element 159.
  • a gap located between the centering element 159 and the inner wall 157 of the first piston element 125 and a corresponding inner wall of the second piston element 130 is sealed by the further sealing element 146.
  • the second piston element 130 has an annular shape.
  • the centering element 159 is guided through the axial through opening of the second piston element 130.
  • a connection point 160, at which the second piston element 130 is coupled to the first piston element 125, is arranged centrally on or through a main surface of the second piston element 130 and / or centrally on or in the elevation 155 of the first piston element 125.
  • piston element 125 is larger than a second volume of the second piston element 130.
  • the first piston element 125 has a guide section 165 at an end facing away from the second piston element 130, which is designed to reliably guide the piston device 115 when it moves the piston device 115 along at least one side of the
  • the sealing element 135 is in the assembly state shown on the circumferential inner wall of the
  • Piston housing 120 on.
  • the further sealing element 146 lies in the one shown
  • the Sealing element 135 can also be referred to as an outer sealing ring and the further sealing element 146 as an inner sealing ring.
  • the piston housing 120 is tubular.
  • an inner tube wall of the piston housing 120 has a uniform, circumferential tubular configuration.
  • the inner tube wall is without a circumferential recess, for example without a groove or groove for guiding the
  • the piston device 115 presented here can also be referred to as a two-part piston for an electropneumatic modulator 105.
  • the piston system 110 advantageously realizes a piston with a seal in a housing with little wear and easy assembly.
  • the size of the recess 150 is advantageously always the same, regardless of a position of the
  • Piston device 115 The O-ring can therefore not move or can move only very slightly in the recess 150 and therefore does not wear, or only barely. According to this exemplary embodiment, the O-ring lies on a shoulder of the first piston element 125. Therefore, no further component for guiding the sealing element 135 is advantageously necessary between the piston housing 120 and the piston device 115.
  • the shaping of the piston device 115 presented here it is also not necessary to create a recess or groove in the piston housing 120 in the raw part or by machining, as a result of which a complicated tool geometry or unwanted bypasses on the sealing surface would be possible. Thanks to the piston device 115 presented here, machining of a recess or groove in the housing is not necessary. By opening voids is avoided.
  • the piston device 115 is coupled by two individual components which are connected to one another. According to this exemplary embodiment, the connection is realized by one or more screws, or according to an alternative
  • Embodiment by at least one latching and / or welding and / or similar connection.
  • the sealing element 135 or a plurality of sealing elements 135 may have been inserted or drawn into the piston package before the connection or after the connection in the manufacture of the piston device 115.
  • sealing element 135 is designed as a Z-ring or a sealing element 135 having a different geometry.
  • the sealing element 135 is injection-molded onto one of the piston elements 125, 130 in the form of a sealing geometry and the other piston element 125, 130 is arranged as a counterhold.
  • An advantage of the piston device 115 lies in the simple assembly of the sealing element 135. This does not have to be greatly expanded during assembly in order to have a
  • sealing flank to be pulled.
  • sealing element 135 is in the
  • Piston device 115 can be preassembled, as a result of which assembly of the piston device 115 in the piston housing 120 can be carried out very easily.
  • a depth of the recess 150 can also be increased and is therefore advantageously not dependent on the installation conditions of the seal, as a result of which a geometry of the seal is further optimized in order to ensure a more stable system.
  • Machined groove in the piston housing 120 is not required.
  • the electropneumatic modulator 105 is part of a brake system of the vehicle 100.
  • the brake system comprises a reservoir 170 for providing compressed air, one
  • Control device 172 for providing a control signal and a braking device 174 for braking a wheel of vehicle 100.
  • the functionality of modulator 105 corresponds to the functionality of known electropneumatic modulators used in connection with braking systems.
  • the electropneumatic modulator 105 has a control input 180 for receiving the control signal from the control device 172, a supply connection 182 for supplying the compressed air from the supply container 170 and a brake output 184 for outputting a brake pressure to the
  • the brake device 174 can be designed in accordance with a brake which is customary in the vehicle area and can comprise, for example, a brake cylinder which can be actuated by the brake pressure.
  • the control signal represents an electrical signal.
  • the control signal can indicate a requested target brake pressure.
  • the control device 172 is designed, for example, as a brake control device, and the electropneumatic modulator 105 comprises, for example, at least one solenoid valve, which uses the
  • Control signal or one in response to receipt of the control signal
  • the second region 145 represents a control chamber which can be supplied with compressed air supplied in a controlled manner by the control signal in order to bring about a switching movement of the piston device 115.
  • the first region 140 represents a working chamber which is fluidly connected to the brake outlet 184 and can be acted upon by the switching movement of the piston device 115 with compressed air supplied via the supply port 182, around which the
  • FIG. 2 shows a schematic cross-sectional illustration of one half of a piston device 115 arranged in a piston housing 120 according to one
  • Embodiment This can be an embodiment of a
  • Act piston device that can be used in connection with an electropneumatic modulator, as described with reference to FIG. 1.
  • a piston passage opening 200 extends through the first piston element 125 and the second piston element 135 coupled to the first piston element 125 in order to fluidly connect the first region 140 to the second region 145.
  • the two piston elements 125, 135 thus each have a through opening, which are arranged opposite one another in the assembled state of the piston device 115.
  • Piston passage opening 200 realized.
  • the piston passage opening 200 is used to create a throttle between the upper space, that is to say the second region 145, and the lower space, that is to say the first region 140, as is shown below with reference to FIG. 3.
  • the first has
  • Piston element 125 according to this exemplary embodiment, at least a first one
  • the second piston element 130 has at least one second through opening 215 in order to fluidly connect the second region 145 to the intermediate volume space 210.
  • a diameter of the intermediate volume space 210 is according to this
  • Intermediate volume space 210 is formed as a recess in an elevation surface of the elevation of the first piston element 125 facing the second piston element 130. According to an alternative embodiment, the
  • a further channel guide is used to include a timing element with an intermediate volume in the form of the intermediate volume space 210 and two throttles, here the first and second Through opening 205, 215 to create between the upper and lower space.
  • the piston device 115 has only the piston passage opening 200 or only the first passage opening 205, the intermediate volume space 210 and the second passage opening 215 in one of the variants described.
  • the channel or channels in the form of the piston passage opening 200, the first passage opening 205 and / or the second passage opening 215 act by delaying pressure equalization and allowing a damping effect in the system.
  • FIG. 3 shows a schematic illustration of a throttle 300 of a piston device according to an exemplary embodiment. This can be the throttle described in FIG. 2, which is implemented in FIG. 2 in the form of the piston passage opening.
  • the throttle 300 fluidly connects a volume above the piston device, that is to say the second region 145, to a volume below the piston device, that is to say the first region 140.
  • FIG. 4 shows a schematic illustration of two chokes 400, 405 one
  • Piston device according to an embodiment.
  • This can be a first throttle 400 and a second throttle 405, which are realized in FIG. 2 as the first through opening and the second through opening.
  • the second throttle 405 fluidly connects a volume above the piston device to a volume between the piston elements or piston halves.
  • the first throttle 400 connects according to this
  • Embodiment fluidically the volume between the piston elements or piston halves with a volume below the piston device.
  • a delay in pressure equalization between the first region 140 and the second region 145 is dependent on the volume of the intermediate volume space 210.
  • 5 shows a schematic cross-sectional illustration of an electropneumatic modulator 105 with a piston system 110 with a piston device according to an exemplary embodiment. This can be the modulator 105 described in FIG. 1 with the piston system 110, both halves of the piston system 110 being shown completely in accordance with this exemplary embodiment. It is also in the
  • Figures 1 and 2 shown axis of symmetry 122 shown.
  • the piston device is received in a receiving chamber of an exemplary one-piece housing of the modulator 105.
  • the first piston element 125 forms a valve seat at an end facing away from the second piston element 130.
  • the inner wall of the first piston element 125 also has a taper at an end facing away from the second piston element 130. This forms a narrow outlet channel 500.
  • the outlet channel 500 has one
  • a channel running within the centering element 159 forms, together with the outlet channel 500, an outlet for an outlet solenoid valve of the modulator 105.
  • the outlet solenoid valve is one of a plurality of solenoid valves 505 of the modulator 105.
  • the modulator 105 has one
  • pneumatic control input channel 510 which is also used as a backup connection
  • FIG. 6 shows a flow diagram of a method 600 for producing a
  • Piston device according to an embodiment. This can be an exemplary embodiment of the piston devices described with reference to one of the preceding figures.
  • the method 600 includes a step 605 of providing, a step 610 of coupling, and a step 615 of arranging.
  • step 605 of providing a first piston element that is designed to be arranged in a piston housing and a second piston element that is designed to be arranged in the piston housing are provided.
  • step 610 of coupling the first piston element is connected to the second piston element coupled.
  • step 615 of arranging at least one sealing element is arranged between the first piston element and the second piston element in order to seal a first region of the piston housing, which is adjacent to the first piston element, against a second region of the piston housing, which is opposite the first region and is adjacent to the second piston element, when the Piston device is arranged in the piston housing.
  • the arranging step 615 is carried out after the coupling step 610. According to an alternative embodiment, the step 615 of arranging is carried out before the step 610 of the coupling.
  • an exemplary embodiment comprises a “and / or” link between a first feature and a second feature, it should be read in such a way that the
  • Embodiment according to one embodiment has both the first feature and the second feature and according to a further embodiment either only the first feature or only the second feature.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)

Abstract

L'invention concerne un dispositif à piston (115) pour un modulateur (105) électropneumatique pour un véhicule, ledit dispositif à piston présentant un premier élément piston (125), un second élément piston (130) et au moins un élément d'étanchéité (135). Le premier élément piston (125) est conçu de manière à pouvoir être monté dans un logement de piston (120). Le second élément piston (130) est conçu de manière à être monté dans le logement de piston (120) et est accouplé, dans un premier état de montage, au premier élément piston (125). A l'état monté, l'élément d'étanchéité (135) est disposé entre le premier élément piston (125) et le second élément piston (130), de manière à rendre étanche une première zone (14) du logement de piston (120) jouxtant le premier élément piston (125) relativement à une seconde zone (145) du logement de piston (120) située à l'opposé de la première zone (140) et jouxtant le second élément piston (130).
PCT/EP2019/070876 2018-09-06 2019-08-02 Dispositif à piston pour un modulateur électropneumatique pour un véhicule, système de piston, modulateur et procédé de fabrication d'un dispositif à piston Ceased WO2020048697A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018121716.1A DE102018121716A1 (de) 2018-09-06 2018-09-06 Kolbenvorrichtung für einen elektropneumatischen Modulator für ein Fahrzeug, Kolbensystem, Modulator und Verfahren zum Herstellen einer Kolbenvorrichtung
DE102018121716.1 2018-09-06

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Publication Number Publication Date
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023232334A1 (fr) * 2022-06-02 2023-12-07 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Piston pneumatique et son procédé de production

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US4698013A (en) * 1986-10-20 1987-10-06 Butcher Robert M Mechanism for valve gated injection molding with resilient retaining ring
EP1089006A2 (fr) * 1999-09-29 2001-04-04 KNORR-BREMSE SYSTEME FÜR NUTZFAHRZEUGE GmbH Servo-embrayage hydropneumatique et système comprenant le dite aussi que méthode utilisée
DE10133440A1 (de) 2001-07-10 2003-03-06 Knorr Bremse Systeme Bremsanlage mit elektropneumatischem Modulator
WO2013033453A2 (fr) * 2011-08-31 2013-03-07 Abbott Laboratories Agencement de scellement étanche pour une seringue

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GB201122011D0 (en) * 2011-12-21 2012-02-01 Haldex Brake Products Ltd Valve assembly

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US4698013A (en) * 1986-10-20 1987-10-06 Butcher Robert M Mechanism for valve gated injection molding with resilient retaining ring
EP1089006A2 (fr) * 1999-09-29 2001-04-04 KNORR-BREMSE SYSTEME FÜR NUTZFAHRZEUGE GmbH Servo-embrayage hydropneumatique et système comprenant le dite aussi que méthode utilisée
DE10133440A1 (de) 2001-07-10 2003-03-06 Knorr Bremse Systeme Bremsanlage mit elektropneumatischem Modulator
WO2013033453A2 (fr) * 2011-08-31 2013-03-07 Abbott Laboratories Agencement de scellement étanche pour une seringue

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023232334A1 (fr) * 2022-06-02 2023-12-07 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Piston pneumatique et son procédé de production

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