WO2021037930A1 - Valve assembly - Google Patents

Valve assembly Download PDF

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Publication number
WO2021037930A1
WO2021037930A1 PCT/EP2020/073881 EP2020073881W WO2021037930A1 WO 2021037930 A1 WO2021037930 A1 WO 2021037930A1 EP 2020073881 W EP2020073881 W EP 2020073881W WO 2021037930 A1 WO2021037930 A1 WO 2021037930A1
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WO
WIPO (PCT)
Prior art keywords
valve
closing body
assembly according
valve assembly
housing
Prior art date
Application number
PCT/EP2020/073881
Other languages
German (de)
French (fr)
Inventor
Maximilian KRETSCHMER
Original Assignee
Continental Teves Ag & Co. Ohg
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 Continental Teves Ag & Co. Ohg filed Critical Continental Teves Ag & Co. Ohg
Publication of WO2021037930A1 publication Critical patent/WO2021037930A1/en

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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
    • 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 spring
    • F16K15/026Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
    • 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
    • B60T8/00Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32Arrangements 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
    • B60T8/34Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4068Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system the additional fluid circuit comprising means for attenuating pressure pulsations
    • 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
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/42Valve seats
    • 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
    • F16K15/04Check valves with guided rigid valve members shaped as balls
    • F16K15/044Check valves with guided rigid valve members shaped as balls spring-loaded
    • 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
    • F16K47/00Means in valves for absorbing fluid energy
    • F16K47/08Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths

Definitions

  • the invention relates to a valve assembly, in particular for damping pressure oscillations in a hydraulic system, according to the preamble of claim 1.
  • valve assembly of the specified type is already known from DE 10 2009 006 980 A1.
  • This valve assembly is part of a damper unit in order to minimize the pressure pulsation initiated by a piston pump in a motor vehicle brake.
  • the valve assembly consists of a cartridge-shaped valve housing in which a closing body loaded by means of a closing spring interacts with a valve seat as a function of the differential pressure.
  • the valve housing has a first and a second hydraulic orifice in different sizes, with the special feature that the first orifice is accommodated in the valve housing in a series arrangement and the second orifice in a parallel arrangement to the closing body.
  • the proposed arrangement has the disadvantage that when the brake is actuated via the two diaphragms, there is a return flow into the damper unit, whereby the elastic damping element arranged in the damping chamber is compressed, which, with a view to the continuous stress on the damping element as well as because of the feel and adverse effect on the pedal characteristics is undesirable.
  • FIG. 1 shows, for arrangement in a hydraulic vehicle brake, a valve assembly according to the invention in longitudinal section with a check valve which prevents the return flow in the direction of a damper unit connected to the valve assembly on the input side.
  • Figure 1 shows in longitudinal section a detailed overall view of the basic construction of the valve assembly according to the invention, which is preferably used for damping pressure oscillations in a brake hydraulic system of a motor vehicle, for which a hydraulic diaphragm in the form of a diaphragm opening 15 is arranged centrally in a closing body 3, which is in a Longitudinal channel 2 of the valve housing 8 is guided, so that regardless of the position of the closing body 3 due to the aperture 15, a permanent connection is created from the valve inlet 7 in the direction of the valve outlet 10 in the valve assembly.
  • a lifting of the closing body 3 from the valve seat surface 9 thus takes place exclusively as a function of the differential pressure, i.e. if the hydraulic pressure acting on the closing body 3 in the valve inlet 7 is greater than the spring pressure of the closing spring 1 designed as a cylinder spring.
  • the closing spring 1 is supported with its first end of the winding on the closing body 3 and with its second end of the winding, arranged diametrically to the first end of the winding, on the bottom of the valve housing 8.
  • the invention proposes that a check valve 4 is integrated in the closing body 3, which in the direction of the valve outlet 10 releases the hydraulic connection in the longitudinal channel 2 between the valve inlet 7 and the valve outlet 10 and, in the opposite direction, the passage in the Longitudinal channel 2 blocked.
  • the mentioned pump noise damping chamber is connected to the pressure side of a pump so that the pump delivery flow is pulsation-free due to several elastically deformable damping elements inserted in the noise damping chamber and then via the valve assembly designed as a cascade valve to a wheel brake.
  • the wheel brake can also be hydraulically acted upon independently of the activation of the pump by the pedal actuation of a master brake cylinder, the features essential to the invention already explained above must be observed in order to avoid undesired pedal haptics and possibly a pedal haptics instead of a pump actuation with an exclusively manual actuation of the wheel brake via the master brake cylinder To prevent an increase in the pedal travel due to the hitherto disadvantageous backflow via the valve outlet 10 of the valve assembly in the opposite direction into the noise damping chamber (damper unit).
  • the check valve 4 consists of a ball and a conical valve seat 6 in the closing body 3, which is arranged in operative connection with the ball in a cavity 14 of the closing body 3.
  • the ball is received with radial and axial play in the cavity 14 of the closing body 3, so that a delay-free response is guaranteed.
  • the cartridge-shaped valve housing 8 is made in two parts from an upper housing part 12 and a lower housing part 13, both of which are at least positively, preferably non-positively connected to one another.
  • the upper housing part 12 having the valve seat surface 9 consists of a thick-walled, preferably by cold hammering or contour turning, a blank made from free-cutting steel, on the underside of which the lower housing part 13, which is cup-shaped from a deep-drawn sheet metal, is received, in which both the closing spring 1 and the check valve 4 receiving closing body 3 is arranged axially movable.
  • the cup-shaped lower housing part 13 has to form a valve outlet 10 in its lateral surface at least one opening 5, which is preferably made by punching in the vicinity of the junction of the two housing parts.
  • the closing body 3 is designed as a plunger which, under the action of the closing spring 1, rests with its dome-shaped plunger head 16 on the valve seat surface 9, the conical end face of which facing the plunger head 16 forms a valve seat.
  • a diaphragm opening 15 is provided in the ram head 16, which is aligned with the longitudinal channel 2.
  • the aperture 15 extends into a cavity 14 which receives the check valve 4 in the closing body 3 and which can be connected to the valve outlet 10 in the valve housing 8 via at least one passage 11 in the jacket of the closing body 3.
  • the plunger has a collar 17 which is precisely guided in the lower housing part 13 and on whose end face facing away from the plunger head 16 the closing spring 1 is supported.
  • the check valve 4 is preferably loose and therefore not received under the action of a compression spring in the cup-shaped lower housing part 13, which, as part of an evacuation and filling process required for a hydraulic brake system, favors a comprehensive evacuation of the noise damping chamber via the valve outlet 10 of the valve assembly .
  • the check valve 4 can be inserted into the plunger head 16, which is designed to be detachable from the closing body 3 and which is fixed on the closing body 3 by means of a press connection formed in the shape of a collar above the collar 17.
  • FIG. 2 shows, in longitudinal section, an alternative arrangement of the check valve 4 directly in the longitudinal channel 2, so that the check valve 4 is movably received directly between the plunger head 16 and a valve seat 6 integrated in the longitudinal channel 2.
  • the orifice 15 is no longer integrated in the plunger head 13, which is now integrated as a notch in the valve seat surface 9. All other details shown in FIG. 2 correspond to the details already described for FIG.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Check Valves (AREA)

Abstract

The invention relates to a valve assembly, consisting of a cartridge-shaped valve housing (8) having a longitudinal channel (2), which connects a valve inlet (7) to a valve outlet (10) and in which a closing body (3) loaded by means of a closing spring (1) cooperates with a valve seat surface (9) of the valve housing (8), the closing spring (1) being supported, at its first winding end, on the closing body (3) and, at its second winding end arranged diametrically to the first winding end, in the valve housing (8), the valve housing also having a hydraulic orifice opening (19), which is arranged in parallel with the closing body (3) for the bypassing of the closing body (3). According to the invention, a check valve (4) is inserted in the closing body (3), which check valve opens the hydraulic connection between the valve inlet (7) and the valve outlet (10) in the direction toward the valve outlet (10) and blocks the passage in the opposite direction.

Description

Ventilbaugruppe Valve assembly
Die Erfindung betrifft eine Ventilbaugruppe, insbesondere zur Dämpfung von Druckschwingungen in einem Hydrauliksystem, nach dem Oberbegriff des Patentanspruchs 1 . The invention relates to a valve assembly, in particular for damping pressure oscillations in a hydraulic system, according to the preamble of claim 1.
Eine Ventilbaugruppe der angegebenen Art ist bereits aus DE 10 2009 006 980 A1 bekannt. Diese Ventilbaugruppe ist ein Bestandteil einer Dämpfereinheit, um die von einer Kolbenpumpe initiierten Druckpulsation in einer Kraftfahrzeugbremse zu minimieren. Die Ventilbaugruppe besteht aus einem patronenförmigen Ventilgehäuse, in dem ein mittels einer Schließfeder belasteter Schließkörper mit einem Ventilsitz differenzdruckabhängig zusammenwirkt. Zur Variation des Durchflusses weist das Ventilgehäuse eine erste und eine zweite hydraulische Blende in unterschiedlichen Größen auf, mit der Besonderheit, dass die erste Blende in Reihenanordnung und die zweite Blende in Parallelanordnung zum Schließkörper im Ventilgehäuse aufgenommen ist. A valve assembly of the specified type is already known from DE 10 2009 006 980 A1. This valve assembly is part of a damper unit in order to minimize the pressure pulsation initiated by a piston pump in a motor vehicle brake. The valve assembly consists of a cartridge-shaped valve housing in which a closing body loaded by means of a closing spring interacts with a valve seat as a function of the differential pressure. To vary the flow, the valve housing has a first and a second hydraulic orifice in different sizes, with the special feature that the first orifice is accommodated in the valve housing in a series arrangement and the second orifice in a parallel arrangement to the closing body.
Die vorgeschlagene Anordnung hat jedoch den Nachteil, dass bei einer Bremsbetätigung über die beiden Blenden eine Rückströmung in die Dämpfereinheit erfolgt, wodurch das in der Dämpfungskammer angeordnete elastisches Dämpfungselement komprimiert wird, was mit Blick auf die Dauerbeanspruchung des Dämpfungselements als auch wegen der Haptik bzw. der nachteiligen Beeinflussung der Pedalcharakteristik unerwünscht ist. However, the proposed arrangement has the disadvantage that when the brake is actuated via the two diaphragms, there is a return flow into the damper unit, whereby the elastic damping element arranged in the damping chamber is compressed, which, with a view to the continuous stress on the damping element as well as because of the feel and adverse effect on the pedal characteristics is undesirable.
Daher ist es die Aufgabe der vorliegenden Erfindung, eine Ventilbaugruppe der eingangs genannten Art weiter zu entwickeln, um durch eine möglichst einfache und funktionsverbesserte Ausführung die vorgenannten Nachteile zu vermeiden. It is therefore the object of the present invention to further develop a valve assembly of the type mentioned at the outset in order to avoid the aforementioned disadvantages by means of a design that is as simple and functionally improved as possible.
Diese Aufgabe wird erfindungsgemäß für eine Ventilbaugruppe der angegebenen Art mit den kennzeichnenden Merkmalen des Patentanspruchs 1 gelöst. According to the invention, this object is achieved for a valve assembly of the specified type with the characterizing features of claim 1.
Weitere Merkmale und Vorteile der Erfindung gehen im Folgenden aus der Beschreibung zweier Ausführungsbeispiele anhand der Figuren 1 und 2 hervor. Es zeigt die Figur 1 zur Anordnung in einer hydraulischen Fahrzeugbremse eine erfindungsgemäße Ventilbaugruppe im Längsschnitt mit einem Rückschlagventil, das die Rückströmung in Richtung einer an der Ventilbaugruppe eingangsseitig angeschlossenen Dämpfereinheit verhindert. Further features and advantages of the invention emerge below from the description of two exemplary embodiments with reference to FIGS. 1 and 2. FIG. 1 shows, for arrangement in a hydraulic vehicle brake, a valve assembly according to the invention in longitudinal section with a check valve which prevents the return flow in the direction of a damper unit connected to the valve assembly on the input side.
Die Figur 1 zeigt im Längsschnitt eine detaillierte Gesamtansicht zur grundlegenden Konstruktion der erfindungsgemäßen Ventilbaugruppe, die bevorzugt zur Dämpfung von Druckschwingungen in einem Bremshydrauliksystem eines Kraftfahrzeugs eingesetzt wird, wozu eine hydraulische Blende in Form einer Blendenöffnungen 15 in einem Schließkörper 3 zentral angeordnet ist, der in einem Längskanal 2 des Ventilgehäuses 8 geführt ist, sodass unabhängig von der Stellung des Schließkörpers 3 infolge der Blendenöffnung 15 ein permanente Verbindung vom Ventileinlass 7 in Richtung des Ventilauslasses 10 in der Ventilbaugruppe geschaffen ist. Der mit einem Ventilsitzfläche 9 im Ventilgehäuse 8 zusammenwirkende Schließkörper 3 ist von einer Schließfeder 1 beaufschlagt, die den Schließkörper 3 in seiner Grundstellung an der Ventilsitzfläche 9 geschlossen hält, sodass in der Grundstellung ausschließlich der Querschnitt der Blendenöffnung 15 freigegeben ist. Ein Abheben des Schließkörpers 3 von der Ventilsitzfläche 9 erfolgt somit ausschließlich differenzdruckabhängig, d.h. sofern der auf den Schließkörper 3 einwirkende Hydraulikdruck im Ventileinlass 7 größer ist als der Federdruck der als Zylinderfeder ausgeführten Schließfeder 1 . Die Schließfeder 1 stützt sich hierzu mit ihrem ersten Windungsende am Schließkörper 3 und mit ihrem zum ersten Windungsende diametral angeordneten zweiten Windungsende am Boden des Ventilgehäuses 8 ab. Figure 1 shows in longitudinal section a detailed overall view of the basic construction of the valve assembly according to the invention, which is preferably used for damping pressure oscillations in a brake hydraulic system of a motor vehicle, for which a hydraulic diaphragm in the form of a diaphragm opening 15 is arranged centrally in a closing body 3, which is in a Longitudinal channel 2 of the valve housing 8 is guided, so that regardless of the position of the closing body 3 due to the aperture 15, a permanent connection is created from the valve inlet 7 in the direction of the valve outlet 10 in the valve assembly. The closing body 3, which interacts with a valve seat surface 9 in the valve housing 8, is acted upon by a closing spring 1, which holds the closing body 3 closed in its basic position on the valve seat surface 9, so that only the cross section of the aperture 15 is released in the basic position. A lifting of the closing body 3 from the valve seat surface 9 thus takes place exclusively as a function of the differential pressure, i.e. if the hydraulic pressure acting on the closing body 3 in the valve inlet 7 is greater than the spring pressure of the closing spring 1 designed as a cylinder spring. For this purpose, the closing spring 1 is supported with its first end of the winding on the closing body 3 and with its second end of the winding, arranged diametrically to the first end of the winding, on the bottom of the valve housing 8.
Um eine Rückströmung vom Ventilauslass 10 in eine stromaufwärts am Ventileinlass 7 der Ventilbaugruppe angeschlosseneTo ensure a return flow from the valve outlet 10 into a flow connected upstream to the valve inlet 7 of the valve assembly
Pumpengeräuschdämpfungskammer (Dämpfereinheit) zu verhindern, schlägt die Erfindung vor, dass im Schließkörper 3 ein Rückschlagventil 4 integriert ist, das in Richtung des Ventilauslasses 10 die hydraulische Verbindung im Längskanal 2 zwischen dem Ventileinlass 7 und dem Ventilauslass 10 freigibt und in umgekehrter Richtung den Durchlass im Längskanal 2 versperrt. Die erwähnte Pumpengeräuschdämpfungskammer steht mit der Druckseite einer Pumpe in Verbindung, sodass der Pumpenförderstroms pulsationsfrei infolge mehrerer in die Geräuschdämpfungskammer eingesetzter, elastisch verformbarer Dämpferelemente und anschließend über die als Kaskadenventil konzipierte Ventilbaugruppe zu einer Radbremse gelangt. To prevent pump noise damping chamber (damper unit), the invention proposes that a check valve 4 is integrated in the closing body 3, which in the direction of the valve outlet 10 releases the hydraulic connection in the longitudinal channel 2 between the valve inlet 7 and the valve outlet 10 and, in the opposite direction, the passage in the Longitudinal channel 2 blocked. The mentioned pump noise damping chamber is connected to the pressure side of a pump so that the pump delivery flow is pulsation-free due to several elastically deformable damping elements inserted in the noise damping chamber and then via the valve assembly designed as a cascade valve to a wheel brake.
Da die Radbremse unabhängig von der Aktivierung der Pumpe ebenso durch die Pedalbetätigung eines Hauptbremszylinders hydraulisch beaufschlagbar ist, sind die zuvor bereits erläuterten erfindungswesentlichen Merkmale zu beachten, um anstelle einer Pumpenbetätigung bei einer ausschließlich manuellen Betätigung der Radbremse über den Hauptbremszylinder eine unerwünschte Pedalhaptik und ggf. eine Zunahme des Pedalwegs durch die bisher nachteilige Rückströmung über den Ventilauslass 10 der Ventilbaugruppe in umgekehrter Richtung in die Geräuschdämpfungskammer (Dämpfereinheit) zu verhindern. Since the wheel brake can also be hydraulically acted upon independently of the activation of the pump by the pedal actuation of a master brake cylinder, the features essential to the invention already explained above must be observed in order to avoid undesired pedal haptics and possibly a pedal haptics instead of a pump actuation with an exclusively manual actuation of the wheel brake via the master brake cylinder To prevent an increase in the pedal travel due to the hitherto disadvantageous backflow via the valve outlet 10 of the valve assembly in the opposite direction into the noise damping chamber (damper unit).
In einer zweckmäßigen, konstruktiv besonders einfachen Bauweise besteht das Rückschlagventil 4 aus einer Kugel und einem im Schließkörper 3 kegelförmig ausgebildeten Ventilsitz 6, der in Wirkverbindung mit der Kugel in einem Hohlraum 14 des Schließkörpers 3 angeordnet ist. Die Kugel ist mit Radial- als auch Axialspiel im Hohlraum 14 des Schließkörpers 3 aufgenommen, sodass ein verzögerungsfreies Ansprechverhalten gewährleistet ist. In an expedient, structurally particularly simple design, the check valve 4 consists of a ball and a conical valve seat 6 in the closing body 3, which is arranged in operative connection with the ball in a cavity 14 of the closing body 3. The ball is received with radial and axial play in the cavity 14 of the closing body 3, so that a delay-free response is guaranteed.
Das patronenförmige Ventilgehäuse 8 ist zweiteilig aus einem Gehäuseoberteil 12 und einem Gehäuseunterteil 13 hergestellt, die beide zumindest formschlüssig, vorzugsweise kraftschlüssig miteinander verbunden sind. Das die Ventilsitzfläche 9 aufweisende Gehäuseoberteil 12 besteht aus einem dickwandigen, vorzugsweise durch Kaltschlagen oder Konturdrehen eines aus einem Automatenstahl gefertigten Rohlings, an dessen Unterseite das aus einem Tiefziehblech topfförmig verformte Gehäuseunterteil 13 aufgenommen ist, in dem sowohl die Schließfeder 1 als auch der das Rückschlagventil 4 aufnehmende Schließkörper 3 axial beweglich angeordnet ist. The cartridge-shaped valve housing 8 is made in two parts from an upper housing part 12 and a lower housing part 13, both of which are at least positively, preferably non-positively connected to one another. The upper housing part 12 having the valve seat surface 9 consists of a thick-walled, preferably by cold hammering or contour turning, a blank made from free-cutting steel, on the underside of which the lower housing part 13, which is cup-shaped from a deep-drawn sheet metal, is received, in which both the closing spring 1 and the check valve 4 receiving closing body 3 is arranged axially movable.
Das topfförmige Gehäuseunterteil 13 weist zur Ausbildung eines Ventilauslasses 10 in seiner Mantelfläche wenigstens eine Öffnung 5 auf, die in Nähe der Verbindungsstelle beider Gehäuseteile vorzugsweise durch Stanzen hergestellt ist. The cup-shaped lower housing part 13 has to form a valve outlet 10 in its lateral surface at least one opening 5, which is preferably made by punching in the vicinity of the junction of the two housing parts.
Zur möglichst kompakten Ausführung ist der Schließkörper 3 als Stößel gestaltet, der sich unter der Wirkung der Schließfeder 1 mit seinem kalottenförmigen Stößelkopf 16 an der Ventilsitzfläche 9 abstützt, dessen dem Stößelkopf 16 zugewandte kegelförmige Stirnfläche einen Ventilsitz bildet. For the most compact design possible, the closing body 3 is designed as a plunger which, under the action of the closing spring 1, rests with its dome-shaped plunger head 16 on the valve seat surface 9, the conical end face of which facing the plunger head 16 forms a valve seat.
Wie eingangs erwähnt ist eine Blendenöffnung 15 im Stößelkopf 16 vorgesehen, die fluchtend zum Längskanal 2 ausgerichtet ist. Die Blendenöffnung 15 erstreckt sich in einen das Rückschlagventil 4 im Schließkörper 3 aufnehmenden Hohlraum 14, der über wenigstens einen Durchlass 11 im Mantel des Schließkörpers 3 mit dem Ventilauslass 10 im Ventilgehäuse 8 verbindbar ist. As mentioned at the beginning, a diaphragm opening 15 is provided in the ram head 16, which is aligned with the longitudinal channel 2. The aperture 15 extends into a cavity 14 which receives the check valve 4 in the closing body 3 and which can be connected to the valve outlet 10 in the valve housing 8 via at least one passage 11 in the jacket of the closing body 3.
Ferner geht aus der Figur 1 hervor, dass der Stößel einen im Gehäuseunterteil 13 präzise geführten Bund 17 aufweist, an dessen vom Stößelkopf 16 abgewandten Stirnfläche sich die Schließfeder 1 abstützt. It can also be seen from FIG. 1 that the plunger has a collar 17 which is precisely guided in the lower housing part 13 and on whose end face facing away from the plunger head 16 the closing spring 1 is supported.
Im Ausführungsbeispiel nach Figur 1 ist das Rückschlagventil 4 bevorzugt lose und damit nicht unter der Wirkung einer Druckfeder im topfförmigen Gehäuseunterteil 13 aufgenommen, was im Rahmen eines für eine hydraulische Bremsanlage erforderlichen Evakuier-und Befüllprozesses eine umfassende Evakuierung der Geräuschdämpfungskammer über den Ventilauslass 10 der Ventilbaugruppe begünstigt. In the exemplary embodiment according to FIG. 1, the check valve 4 is preferably loose and therefore not received under the action of a compression spring in the cup-shaped lower housing part 13, which, as part of an evacuation and filling process required for a hydraulic brake system, favors a comprehensive evacuation of the noise damping chamber via the valve outlet 10 of the valve assembly .
Das Rückschlagventil 4 lässt sich in den vom Schließkörper 3 abnehmbar ausgebildeten Stößelkopf 16 einsetzen, der mittels einer oberhalb des Bunds 17 kragenförmig ausgebildeten Pressverbindung am Schließkörper 3 fixiert ist. The check valve 4 can be inserted into the plunger head 16, which is designed to be detachable from the closing body 3 and which is fixed on the closing body 3 by means of a press connection formed in the shape of a collar above the collar 17.
Schließlich zeigt die Figur 2 im Längsschnitt eine alternative Anordnung des Rückschlagventils 4 unmittelbar im Längskanal 2, sodass das Rückschlagventil 4 unmittelbar zwischen dem Stößelkopf 16 und einem im Längskanal 2 integrierten Ventilsitz 6 beweglich aufgenommen ist. Damit vereinfacht sich die Gestaltung des Schließkörpers 3, der somit einteilig ausgeführt ist und bei Wunsch oder Bedarf im Bereich seines Bunds 17 mit einer Dichtung versehen ist. Ferner entfällt die Integration der Blendenöffnung 15 im Stößelkopf 13, welche nunmehr als Kerbe in der Ventilsitzfläche 9 integriert ist. Alle weiteren in der Figur 2 abgebildeten Einzelheiten entsprechen den zu Figur 1 bereits beschriebenen Einzelheiten. Finally, FIG. 2 shows, in longitudinal section, an alternative arrangement of the check valve 4 directly in the longitudinal channel 2, so that the check valve 4 is movably received directly between the plunger head 16 and a valve seat 6 integrated in the longitudinal channel 2. This simplifies the design of the Closing body 3, which is thus made in one piece and, if desired or required, is provided with a seal in the area of its collar 17. Furthermore, the orifice 15 is no longer integrated in the plunger head 13, which is now integrated as a notch in the valve seat surface 9. All other details shown in FIG. 2 correspond to the details already described for FIG.
Bezugszeichenliste List of reference symbols
1 Schließfeder 1 closing spring
2 Längskanal 3 Schließkörper2 longitudinal channel 3 closing body
4 Rückschlagventil4 check valve
5 Öffnung 5 opening
6 Ventilsitz 6 valve seat
7 Ventileinlass 8 Ventilgehäuse7 valve inlet 8 valve housing
9 Ventilsitzfläche9 valve seat surface
10 Ventilauslass 10 valve outlet
11 Durchlass 11 passage
12 Gehäuseoberteil 13 Gehäuseunterteil12 Upper part of the housing 13 Lower part of the housing
14 Hohlraum 14 cavity
15 Blendenöffnung15 aperture
16 Stößelkopf 16 ram head
17 Bund 17 Confederation

Claims

Patentansprüche Claims
1. Ventilbaugruppe, insbesondere zur Dämpfung von Druckschwingungen in einem Hydrauliksystem, bestehend aus einem patronenförmigen Ventilgehäuse, das einen an einer Pumpe angeschlossenen Ventileinlass und einen an einem Hauptbremszylinder angeschlossenen Ventilauslass aufweist, mit einem im Ventilgehäuse angeordneten Längskanal, in dem ein mittels einer Schließfeder belasteter Schließkörper mit einer Ventilsitzfläche des Ventilgehäuses zusammenwirkt, wobei die Schließfeder sich mit ihrem ersten Windungsende am Schließkörper und mit ihrem zum ersten Windungsende diametral angeordneten zweiten Windungsende im Ventilgehäuse abstützt, sowie mit einer hydraulischen Blende, die zur Umgehung des Schließkörpers in einer Parallelschaltung zum Schließkörper angeordnet ist, dadurch gekennzeichnet, dass stromaufwärts zum Ventilauslass (10) im Ventilgehäuse (8) ein Rückschlagventil (4) integriert ist, das in Richtung des Ventilauslasses (10) die hydraulische Verbindung im Längskanal (2) zwischen dem Ventileinlass (7) und dem Ventilauslass (10) freigibt und in umgekehrter Richtung den Durchlass im Längskanal (2) versperrt. 1. Valve assembly, in particular for damping pressure vibrations in a hydraulic system, consisting of a cartridge-shaped valve housing which has a valve inlet connected to a pump and a valve outlet connected to a master brake cylinder, with a longitudinal channel arranged in the valve housing, in which a closing body loaded by means of a closing spring cooperates with a valve seat surface of the valve housing, the closing spring being supported with its first end of the winding on the closing body and with its second end of the winding arranged diametrically to the first end of the winding in the valve housing, as well as with a hydraulic diaphragm which is arranged in parallel to the closing body to bypass the closing body, characterized in that upstream of the valve outlet (10) in the valve housing (8) a check valve (4) is integrated, which in the direction of the valve outlet (10) the hydraulic connection in the longitudinal channel (2) between de m opens the valve inlet (7) and the valve outlet (10) and in the opposite direction blocks the passage in the longitudinal channel (2).
2. Ventilbaugruppe nach Anspruch 1 , dadurch gekennzeichnet, dass das Rückschlagventil (4) im Schließkörper (3) integriert ist. 2. Valve assembly according to claim 1, characterized in that the check valve (4) is integrated in the closing body (3).
3. Ventilbaugruppe nach Anspruch 2, dadurch gekennzeichnet, dass das Rückschlagventil (4) aus einer Kugel und einem im Schließkörper (3) kegelförmig ausgebildeten Ventilsitz (6) besteht, der in Wirkverbindung mit der Kugel in einem Hohlraum (14) des Schließkörpers (3) angeordnet ist. 3. Valve assembly according to claim 2, characterized in that the check valve (4) consists of a ball and a conical valve seat (6) in the closing body (3), which is in operative connection with the ball in a cavity (14) of the closing body (3 ) is arranged.
4. Ventilbaugruppe nach Anspruch 3, dadurch gekennzeichnet, dass die Kugel mit Radial- als auch Axialspiel im Hohlraum (14) des Schließkörpers (3) aufgenommen ist. 4. Valve assembly according to claim 3, characterized in that the ball is received with radial and axial play in the cavity (14) of the closing body (3).
5. Ventilbaugruppe nach Anspruch 1 , dadurch gekennzeichnet, dass das Ventilgehäuse (8) zweiteilig aus einem Gehäuseoberteil (12) und einem Gehäuseunterteil (13) ausgeführt ist, die beide form- und/oder kraftschlüssig miteinander verbunden sind. 5. Valve assembly according to claim 1, characterized in that the Valve housing (8) is made in two parts from an upper housing part (12) and a lower housing part (13), both of which are positively and / or non-positively connected to one another.
6. Ventilbaugruppe nach Anspruch 5, dadurch gekennzeichnet, dass das eine Ventilsitzfläche (9) aufweisende Gehäuseoberteil (12) aus einem dickwandigen, vorzugsweise durch Kaltschlagen oder Konturdrehen eines aus einem Automatenstahl gefertigten Rohlings besteht, an dessen Unterseite das aus einem Tiefziehblech topfförmig verformte Gehäuseunterteil (13) aufgenommen ist, in dem sowohl eine Schließfeder (1) als auch der ein Rückschlagventil (4) aufnehmende Schließkörper (3) axial beweglich angeordnet ist. 6. Valve assembly according to claim 5, characterized in that the upper housing part (12) having a valve seat surface (9) consists of a thick-walled, preferably by cold hammering or contour turning, a blank made from a free-cutting steel, on the underside of which the lower housing part, which is cup-shaped from a deep-drawn sheet metal, is formed on the bottom side ( 13) is received, in which both a closing spring (1) and the closing body (3), which receives a check valve (4), are arranged so as to be axially movable.
7. Ventilbaugruppe nach Anspruch 4, dadurch gekennzeichnet, dass das topfförmige Gehäuseunterteil (13) zur Ausbildung eines Ventilauslasses (10) in seiner Mantelfläche wenigstens eine Öffnung (5) aufweist, die in Nähe der Verbindungsstelle beider Gehäuseteile vorzugsweise durch Stanzen hergestellt ist. 7. Valve assembly according to claim 4, characterized in that the cup-shaped lower housing part (13) for forming a valve outlet (10) in its lateral surface has at least one opening (5) which is preferably made by punching near the junction of the two housing parts.
8. Ventilbaugruppe nach Anspruch 6, dadurch gekennzeichnet, dass der Schließkörper (3) als Stößel ausgeführt ist, der sich unter der Wirkung der Schließfeder (1) mit seinem kalottenförmigen Stößelkopf (16) an der Ventilsitzfläche (9) abstützt, dessen dem Stößelkopf (16) zugewandte kegelförmige Stirnfläche den Ventilsitz bildet. 8. Valve assembly according to claim 6, characterized in that the closing body (3) is designed as a plunger which, under the action of the closing spring (1), is supported with its dome-shaped plunger head (16) on the valve seat surface (9), the plunger head of which ( 16) facing conical end face forms the valve seat.
9. Ventilbaugruppe nach Anspruch 8, dadurch gekennzeichnet, dass im Stößelkopf (16) eine Blendenöffnung (15) vorgesehen ist, die fluchtend zum Längskanal (2) angeordnet ist 9. Valve assembly according to claim 8, characterized in that a diaphragm opening (15) is provided in the tappet head (16), which aperture is arranged in alignment with the longitudinal channel (2)
10. Ventilbaugruppe nach Anspruch 9, dadurch gekennzeichnet, dass sich die Blendenöffnung (15) in einen das Rückschlagventil (4) im Schließkörper (3) aufnehmenden Hohlraum (14) erstreckt, der über wenigstens einen Durchlass (11) im Mantel des Schließkörpers (3) mit einem Ventilauslass (10) im Ventilgehäuse (8) verbindbar ist. 10. Valve assembly according to claim 9, characterized in that the aperture opening (15) extends into a non-return valve (4) in the closing body (3) receiving cavity (14) which has at least one passage (11) in the jacket of the closing body (3 ) can be connected to a valve outlet (10) in the valve housing (8).
11. Ventilbaugruppe nach Anspruch 8, dadurch gekennzeichnet, dass der Stößel einen im Gehäuseunterteil (13) geführten Bund (17) aufweist, an dessen vom Stößelkopf (16) abgewandten Stirnfläche sich eine Schließfeder (1) abstützt. 11. Valve assembly according to claim 8, characterized in that the plunger has a collar (17) guided in the lower housing part (13), on whose end face facing away from the plunger head (16) a closing spring (1) is supported.
12. Ventilbaugruppe nach Anspruch 1 , dadurch gekennzeichnet, dass das Rückschlagventil (4) unmittelbar zwischen dem geschlossenen Stößelkopf (16) und dem Ventileinlass (7) direkt im Längskanal (2) aufgenommen ist. 12. Valve assembly according to claim 1, characterized in that the check valve (4) is received directly between the closed plunger head (16) and the valve inlet (7) directly in the longitudinal channel (2).
13. Ventilbaugruppe nach Anspruch 12, dadurch gekennzeichnet, dass ein13. Valve assembly according to claim 12, characterized in that a
Ventilsitz (6) für das Rückschlagventil (4) unmittelbar im Längskanal (2) ausgebildet ist. Valve seat (6) for the check valve (4) is formed directly in the longitudinal channel (2).
14. Ventilbaugruppe nach Anspruch 12, dadurch gekennzeichnet, dass eine Blendenöffnung (15) als Längskerbe in der Ventilsitzfläche (9) des geschlossenen Stößelkopfs (16) ausgebildet ist. 14. Valve assembly according to claim 12, characterized in that a diaphragm opening (15) is designed as a longitudinal notch in the valve seat surface (9) of the closed plunger head (16).
PCT/EP2020/073881 2019-08-29 2020-08-26 Valve assembly WO2021037930A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102019213040.2 2019-08-29
DE102019213040 2019-08-29
DE102020208639.7 2020-07-09
DE102020208639.7A DE102020208639A1 (en) 2019-08-29 2020-07-09 Valve assembly

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WO2022249014A1 (en) * 2021-05-28 2022-12-01 ロベルト·ボッシュ·ゲゼルシャフト·ミト•ベシュレンクテル·ハフツング Pulsation reducing device and vehicle brake fluid pressure control device comprising said pulsation reducing device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009006980A1 (en) 2008-02-08 2009-08-13 Continental Teves Ag & Co. Ohg Hydraulic unit with improved pulsation damping
DE102009046577A1 (en) * 2009-11-10 2011-05-12 Robert Bosch Gmbh Spring-loaded check valve for reduction of pressure ripples and noises in piston pump of e.g. antilock braking system in motor vehicle, has closure element movable in flow direction, so as to move closing body and element in flow direction
US20160176387A1 (en) * 2014-12-16 2016-06-23 Robert Bosch Gmbh Pressure Change Damper for a Hydraulic Vehicle Brake System with Brake Force Control, and Hydraulic Vehicle Brake System with Brake Force Control with such a Pressure Change Damper
DE102016206032A1 (en) * 2016-04-12 2017-10-12 Continental Teves Ag & Co. Ohg Vehicle brake system and cascade panel for this

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009006980A1 (en) 2008-02-08 2009-08-13 Continental Teves Ag & Co. Ohg Hydraulic unit with improved pulsation damping
DE102009046577A1 (en) * 2009-11-10 2011-05-12 Robert Bosch Gmbh Spring-loaded check valve for reduction of pressure ripples and noises in piston pump of e.g. antilock braking system in motor vehicle, has closure element movable in flow direction, so as to move closing body and element in flow direction
US20160176387A1 (en) * 2014-12-16 2016-06-23 Robert Bosch Gmbh Pressure Change Damper for a Hydraulic Vehicle Brake System with Brake Force Control, and Hydraulic Vehicle Brake System with Brake Force Control with such a Pressure Change Damper
DE102016206032A1 (en) * 2016-04-12 2017-10-12 Continental Teves Ag & Co. Ohg Vehicle brake system and cascade panel for this

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