EP3559526A1 - Valve - Google Patents

Valve

Info

Publication number
EP3559526A1
EP3559526A1 EP17821547.1A EP17821547A EP3559526A1 EP 3559526 A1 EP3559526 A1 EP 3559526A1 EP 17821547 A EP17821547 A EP 17821547A EP 3559526 A1 EP3559526 A1 EP 3559526A1
Authority
EP
European Patent Office
Prior art keywords
piston
seal
valve according
pin
valve
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.)
Withdrawn
Application number
EP17821547.1A
Other languages
German (de)
French (fr)
Inventor
Rosario Bonanno
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.)
Vitesco Technologies GmbH
Original Assignee
CPT Group 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 CPT Group GmbH filed Critical CPT Group GmbH
Publication of EP3559526A1 publication Critical patent/EP3559526A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/16—Control of the pumps by bypassing charging air
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K25/00—Details relating to contact between valve members and seats
    • F16K25/005—Particular materials for seats or closure elements
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/029—Electromagnetically actuated valves
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0686—Braking, pressure equilibration, shock absorbing
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/022—Devices for relieving the pressure on the sealing faces for lift valves using balancing surfaces
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/024—Devices for relieving the pressure on the sealing faces for lift valves using an auxiliary valve on the main valve

Definitions

  • Valve Subject matter of the invention is a valve comprising a housing, a solenoid disposed in the housing, a pin movable by the solenoid and a piston connected to the pin and a seal.
  • Such valves are used, inter alia, as a diverter valve on the turbocharger in motor vehicles to release a bypass to the suction side in overrun and are thus known.
  • rapid opening and closing of the valve is an essential prerequisite.
  • the piston is therefore made of plastic for weight reasons.
  • the valve seat is formed by the housing of the turbocharger to which the valve is flanged.
  • the invention is therefore based on the object to provide a valve with a reliable performance over the lifetime.
  • the valve should be inexpensive.
  • the object is achieved in that the piston consists of metal, two concentric and parallel to the pin axis ⁇ directed areas and has a seal of a different material from the piston, the seal is arranged in the bottom region of the piston.
  • the formation of the piston made of metal with the arranged in the bottom region seal allows the separation of the function of sealing from the actual piston. This allows a seal-only design of the seal so that the sealing function is improved. At the same time thereby the piston can be made simpler, whereby its production is inexpensive.
  • the provision of two concentric and parallel to the pin axis aligned areas has the advantage that the outer area as before forms the outer surface of the piston, the inner concentric area is used to support the spring.
  • the significantly reduced complexity of the piston, in particular in the bottom ⁇ area allows the production of the piston by deep drawing.
  • a metal piston also has the advantage of a higher temperature resistance, so that the valve according to the invention can cover a wider field of application, especially at higher temperatures.
  • a greater resistance to aggressive media and thus a longer life are given if the piston made of stainless steel, preferably a chromium-nickel steel.
  • a good media resistance is achieved in the seal in that a rubber, preferably ethylene-propylene-diene rubber (EPDM), or a plastic, preferably polyphthalamide (PPA), is used as the sealing material. Both rubber and plastic are well suited for sealing against metallic valve seats. In addition, they can compensate for positional inaccuracies due to tolerances or over the life.
  • EPDM ethylene-propylene-diene rubber
  • PPA polyphthalamide
  • connection of the seal with the piston is particularly simple according to an advantageous embodiment, when the Seal is annular and has a slot in which a housing facing away from the edge of the piston is arranged.
  • the seal can be pressed in the simplest case and thus particularly cost effective on the edge.
  • the seal is vulcanized to the edge. In this way, a particularly intimate bond of piston and seal is achieved. If the seal is made of plastic, it is also possible to overmold the edge with the seal.
  • the seal can be adapted specifically. In a simple way, this can be done by the thickness of the seal body, which is understood as a sealing body of the part of the seal, which is arranged outside of the piston. It has been found that a thickness of 0.3 mm to 5 mm, preferably from 0.5 mm to 3 mm, is advantageous.
  • the two concentric and parallel to the pin axis oriented excluded regions are particularly easy to produce in that the outer portion is the shell surface of a pot-shaped piston and the inner, between the pin and Man ⁇ telcharacterization of the piston region located one to the piston, preferably is a cylinder connected by welding.
  • the piston can be produced as a deep-drawn part and thus in only one step and particularly cost-effectively, if according to a further advantageous embodiment, the two concentric and parallel to the pin axis aligned areas are integrally connected.
  • the radially outer region also forms the lateral surface of the piston, while the radially inner region protects the spring against buckling. There is no need for an additional component.
  • the buckling of the spring is reliably prevented if the radially inner region has at least 30%, preferably 50% and in particular 80%, of the piston height.
  • the connection of the piston with the pin can be done either by welding or riveting. Both types of connection have the advantage that the piston can be connected directly and thus without an additional component to ⁇ also made of metal pin. In a plastic piston to the connection with the pin an additional connecting part be ⁇ required.
  • connection to the pin is simplified when the radially inner region for supporting the spring merges into a flat region that forms the bottom of the piston.
  • the wall thickness of the piston can be made significantly smaller.
  • the metal of the piston has a thickness of 0.3 mm to 0.8 mm, preferably 0.4 mm to 0.6 mm and in particular 0.5 mm.
  • the higher wall thickness of a metal piston compared to a piston made of plastic compensates for the higher density of metal compared to plastic, so that the weight of the valve is not significantly affected.
  • Fig. 1 is a sectional view of the invention
  • Valve and Fig. 2 is an enlarged sectional view of the piston.
  • Figure 1 shows the valve comprising a housing 1 with integrally molded socket 2 for electrically connecting the valve.
  • the housing 1 further has an integrally formed flange 3 and three bores 3a, via which the housing 1 is flanged to a turbocharger, not shown, in the region of the bypass line 4.
  • a solenoid 5 with a coil 6 and a Metal pin 7 is arranged.
  • the metal pin 7 is connected to a cup-shaped piston 8 made of a chromium-nickel steel by means of a rivet connection.
  • a spring 9 biases the piston 8 in the unactuated state of the solenoid 5 against a valve seat 10 to close the bypass line 4, so that no medium from the bypass line 4 can flow into the conduit 11.
  • the spring 9 is supported on the solenoid 5 and on the piston 8.
  • the piston 8 has a wall thickness of 0.5 mm.
  • the piston 8 in Fig. 2 has two concentric and parallel to the pin axis aligned portions 12, 13 which are integrally connected to each other by a region 12 passes through a 180 ° deflection in the other region 13.
  • the radially outer region 12 forms the lateral surface of a pot-shaped piston 8.
  • the radially inner region 13 prevents buckling of the spring 9. After radially inward, the region 13 is in a flat, the bottom of the piston 8 forming region 14 on.
  • the area 14 has a bore through which the metal pin 7 is passed and riveted to the ground.
  • the radially outer region 12 has on its side facing away from the housing 1 a peripheral edge 16.
  • a seal 17 is injection molded from PPA.
  • the edge 16 is angled at an angle of less than 45 ° radially outward. It is also conceivable to increase the bond between the seal 17 and the edge 16 in that the edge 16 has openings which are filled with the seal 17 by the plastic material during the encapsulation of the edge 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Lift Valve (AREA)
  • Magnetically Actuated Valves (AREA)
  • Sealing Devices (AREA)
  • Details Of Valves (AREA)

Abstract

The invention relates to a valve having a housing (1), a solenoid (5) disposed in the housing (1), a pin (7) that can be moved by the solenoid (5), a piston (8) connected to the pin (7), and a seal. The piston (8) consists of a metal, has two regions that are oriented concentrically and in parallel to the pin axis, and a seal which consists of a material different from that of the piston, said seal being arranged in the head region of the piston.

Description

Beschreibung description
Ventil Gegenstand der Erfindung ist ein Ventil mit einem Gehäuse, einem in dem Gehäuse angeordneten Solenoid, einem von dem Solenoid bewegbaren Stift und einem mit dem Stift verbundenen Kolben und einer Dichtung. Solche Ventile werden unter anderem als Schubumluftventil am Turbolader in Kraftfahrzeugen eingesetzt, um im Schubbetrieb einen Bypass zur Saugseite freizugeben und sind somit bekannt. Um ein zu starkes Abbremsen des Turboladers zu verhindern, aber auch ein schnelles Anfahren zu gewährleisten, ist ein schnelles Öffnen und Schließen des Ventils eine wesentliche Voraussetzung. Insbesondere beim Schließen kommt es auf das sofortige Ver¬ schließen durch das Anlegen des Kolbens an einen Ventilsitz an. Der Kolben ist daher aus Gewichtsgründen aus Kunststoff ausgebildet. Der Ventilsitz wird vom Gehäuse des Turboladers gebildet, an dem das Ventil angeflanscht wird. Aufgrund der über die Lebensdauer erforderlichen hohen Anzahl von Schließzyklen und die betriebsbedingten Temperaturbelastungen werden an den Kunststoff und die Ausgestaltung des Kolbens, insbesondere im Bereich der Dichtkante hohe Anforderungen an das Bauteil ge- stellt. Die Kosten für derartige Kolben sind dementsprechend. Zudem kommt es in Einzelfällen zu einer nachlassenden Dichtwirkung über die Lebenszeit. Zudem kommt es aufgrund der Druckverhältnisse in den Leitungen dazu, dass neben den Kräften in und gegen die Schließrichtung zusätzliche Momente auf den Kolben und damit auch auf die Feder einwirken, was bezüglich der Feder die Gefahr des Ausknickens beinhaltet. Valve Subject matter of the invention is a valve comprising a housing, a solenoid disposed in the housing, a pin movable by the solenoid and a piston connected to the pin and a seal. Such valves are used, inter alia, as a diverter valve on the turbocharger in motor vehicles to release a bypass to the suction side in overrun and are thus known. In order to prevent excessive braking of the turbocharger, but also to ensure a quick start, rapid opening and closing of the valve is an essential prerequisite. In particular, when closing it depends on the immediate Ver ¬ closing by the application of the piston to a valve seat. The piston is therefore made of plastic for weight reasons. The valve seat is formed by the housing of the turbocharger to which the valve is flanged. Due to the high number of closing cycles required over the service life and the operational temperature loads, high demands are placed on the component of the plastic and the design of the piston, in particular in the region of the sealing edge. The cost of such pistons are accordingly. In addition, in individual cases, there is a decline in the sealing effect over the lifetime. In addition, due to the pressure conditions in the lines, in addition to the forces in and against the closing direction, additional moments act on the piston and thus also on the spring, which involves the risk of buckling with respect to the spring.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Ventil mit einem zuverlässigen Betriebsverhalten über die Lebenszeit zu schaffen. Das Ventil soll dabei kostengünstig sein. Gelöst wird die Aufgabe dadurch, dass der Kolben aus Metall besteht, zwei konzentrisch und parallel zur Stiftachse aus¬ gerichtete Bereiche besitzt und eine Dichtung aus einem vom Kolben verschiedenen Material besitzt, wobei die Dichtung im Bodenbereich des Kolbens angeordnet ist. The invention is therefore based on the object to provide a valve with a reliable performance over the lifetime. The valve should be inexpensive. The object is achieved in that the piston consists of metal, two concentric and parallel to the pin axis ¬ directed areas and has a seal of a different material from the piston, the seal is arranged in the bottom region of the piston.
Die Ausbildung des Kolbens aus Metall mit der im Bodenbereich angeordneten Dichtung ermöglicht die Trennung der Funktion des Abdichtens vom eigentlichen Kolben. Dies ermöglicht eine einzig auf die Dichtfunktion ausgerichtete Gestaltung der Dichtung, so dass die Dichtfunktion verbessert wird. Gleichzeitig kann dadurch der Kolben einfacher gestaltet werden, wodurch seine Herstellung kostengünstig ist. Das Vorsehen von zwei konzentrisch und parallel zur Stiftachse ausgerichteten Bereichen hat den Vorteil, dass der äußere Bereich wie bisher die äußere Mantelfläche des Kolbens bildet, der innere konzentrische Bereich zur Abstützung der Feder Verwendung findet. Die deutlich verringerte Komplexität des Kolbens, insbesondere im Boden¬ bereich erlaubt die Herstellung des Kolbens mittels Tiefziehens. Ein Metallkolben hat zudem den Vorteil einer höheren Temperaturbeständigkeit, so dass das erfindungsgemäße Ventil ein breiteres Einsatzgebiet, insbesondere bei höheren Temperaturen, abdecken kann. Eine größere Beständigkeit gegenüber aggressiven Medien und damit eine längere Lebensdauer sind gegeben, wenn der Kolben aus Edelstahl, vorzugsweise einem Chrom-Nickel-Stahl, besteht. Eine gute Medienbeständigkeit wird bei der Dichtung dadurch erreicht, dass als Dichtungsmaterial ein Gummi, vorzugsweise Ethylen-Propylen-Dien-Kautschuk (EPDM) , oder ein Kunststoff, vorzugsweise Polyphthalamid (PPA) , verwendet wird. Sowohl Gummi als auch Kunststoff eignen sich gut zur Abdichtung gegenüber metallischen Ventilsitzen. Zudem können sie Lageungenauigkeiten aufgrund von Toleranzen oder über die Lebensdauer ausgleichen. The formation of the piston made of metal with the arranged in the bottom region seal allows the separation of the function of sealing from the actual piston. This allows a seal-only design of the seal so that the sealing function is improved. At the same time thereby the piston can be made simpler, whereby its production is inexpensive. The provision of two concentric and parallel to the pin axis aligned areas has the advantage that the outer area as before forms the outer surface of the piston, the inner concentric area is used to support the spring. The significantly reduced complexity of the piston, in particular in the bottom ¬ area allows the production of the piston by deep drawing. A metal piston also has the advantage of a higher temperature resistance, so that the valve according to the invention can cover a wider field of application, especially at higher temperatures. A greater resistance to aggressive media and thus a longer life are given if the piston made of stainless steel, preferably a chromium-nickel steel. A good media resistance is achieved in the seal in that a rubber, preferably ethylene-propylene-diene rubber (EPDM), or a plastic, preferably polyphthalamide (PPA), is used as the sealing material. Both rubber and plastic are well suited for sealing against metallic valve seats. In addition, they can compensate for positional inaccuracies due to tolerances or over the life.
Die Verbindung der Dichtung mit dem Kolben gestaltet sich gemäß einer vorteilhaften Ausgestaltung besonders einfach, wenn die Dichtung ringförmig ausgebildet ist und einen Schlitz aufweist, in dem ein dem Gehäuse abgewandter Rand des Kolbens angeordnet ist. In dieser Ausgestaltung kann die Dichtung im einfachsten Fall und somit besonders kostengünstig auf den Rand aufgepresst werden. In einer anderen vorteilhaften Ausgestaltung ist die Dichtung an den Rand anvulkanisiert. Auf diese Weise wird ein besonders inniger Verbund von Kolben und Dichtung erreicht. Sofern die Dichtung aus Kunststoff besteht, ist es auch möglich, den Rand mit der Dichtung zu umspritzen. The connection of the seal with the piston is particularly simple according to an advantageous embodiment, when the Seal is annular and has a slot in which a housing facing away from the edge of the piston is arranged. In this embodiment, the seal can be pressed in the simplest case and thus particularly cost effective on the edge. In another advantageous embodiment, the seal is vulcanized to the edge. In this way, a particularly intimate bond of piston and seal is achieved. If the seal is made of plastic, it is also possible to overmold the edge with the seal.
In Abhängigkeit von den Dichtanforderungen und dem Einbauort kann die Dichtung gezielt angepasst werden. In einfacher Weise kann dies durch die Dicke des Dichtungskörpers erfolgen, wobei als Dichtungskörper der Teil der Dichtung verstanden wird, der außerhalb des Kolbens angeordnet ist. Hierbei hat sich gezeigt, dass eine Dicke vom 0,3 mm bis 5 mm, vorzugsweise von 0,5 mm bis 3 mm, vorteilhaft ist. Depending on the sealing requirements and the installation location, the seal can be adapted specifically. In a simple way, this can be done by the thickness of the seal body, which is understood as a sealing body of the part of the seal, which is arranged outside of the piston. It has been found that a thickness of 0.3 mm to 5 mm, preferably from 0.5 mm to 3 mm, is advantageous.
Die beiden konzentrisch und parallel zur Stiftachse ausge- richteten Bereiche lassen sich besonders einfach dadurch erzeugen, dass der äußere Bereich die Mantelfläche eines topf- förmigen Kolbens ist und der innere, zwischen Stift und Man¬ telfläche des Kolbens befindliche Bereich ein mit dem Kolben, vorzugsweise mittels Schweißen verbundener Zylinder ist. Der Kolben lässt sich jedoch als Tiefziehteil und damit in nur einem Arbeitsschritt und besonders kostengünstig herstellen, wenn gemäß einer weiteren vorteilhaften Ausgestaltung die beiden konzentrisch und parallel zur Stiftachse ausgerichteten Bereiche einteilig miteinander verbunden sind. Der radial äußere Bereich bildet ebenso die Mantelfläche des Kolbens, während der radial innere Bereich die Feder gegen ein Ausknicken schützt. Es wird kein zusätzliches Bauteil benötigt. The two concentric and parallel to the pin axis oriented excluded regions are particularly easy to produce in that the outer portion is the shell surface of a pot-shaped piston and the inner, between the pin and Man ¬ telfläche of the piston region located one to the piston, preferably is a cylinder connected by welding. However, the piston can be produced as a deep-drawn part and thus in only one step and particularly cost-effectively, if according to a further advantageous embodiment, the two concentric and parallel to the pin axis aligned areas are integrally connected. The radially outer region also forms the lateral surface of the piston, while the radially inner region protects the spring against buckling. There is no need for an additional component.
Das Ausknicken der Feder wird zuverlässig verhindert, wenn der radial innere Bereich mindestens 30 %, vorzugsweise 50 % und insbesondere 80 %, der Kolbenhöhe besitzt. Die Verbindung des Kolbens mit dem Stift kann entweder durch Schweißen oder Vernieten erfolgen. Beide Verbindungsarten haben den Vorteil, dass der Kolben direkt und somit ohne ein zu¬ sätzliches Bauteil mit dem ebenfalls aus Metall bestehenden Stift verbunden werden kann. Bei einem Kunststoffkolben wird zu dessen Verbindung mit dem Stift ein zusätzliches Verbindungsteil be¬ nötigt . The buckling of the spring is reliably prevented if the radially inner region has at least 30%, preferably 50% and in particular 80%, of the piston height. The connection of the piston with the pin can be done either by welding or riveting. Both types of connection have the advantage that the piston can be connected directly and thus without an additional component to ¬ also made of metal pin. In a plastic piston to the connection with the pin an additional connecting part be ¬ required.
Das Verbinden mit dem Stift wird vereinfacht, wenn der radial innere Bereich für das Abstützen der Feder in einen ebenen Bereich, der den Boden des Kolbens bildet, übergeht. The connection to the pin is simplified when the radially inner region for supporting the spring merges into a flat region that forms the bottom of the piston.
Aufgrund der höheren Stabilität von Metall gegenüber Kunststoff, kann die Wandstärke des Kolbens deutlich geringer ausgebildet werden. In Abhängigkeit vom Einsatzgebiet hat es sich als vorteilhaft herausgestellt, wenn das Metall des Kolbens eine Dicke von 0,3 mm bis 0,8 mm, vorzugsweise von 0,4 mm bis 0,6 mm und insbesondere von 0,5 mm, besitzt. Dabei wird durch die geringere Wandstärke eines Metallkolbens gegenüber einem Kolben aus Kunststoff die höhere Dichte von Metall gegenüber Kunststoff kompensiert, so dass das Gewicht des Ventils nicht wesentlich beeinflusst wird. Due to the higher stability of metal compared to plastic, the wall thickness of the piston can be made significantly smaller. Depending on the field of use, it has proven to be advantageous if the metal of the piston has a thickness of 0.3 mm to 0.8 mm, preferably 0.4 mm to 0.6 mm and in particular 0.5 mm. In this case, the higher wall thickness of a metal piston compared to a piston made of plastic compensates for the higher density of metal compared to plastic, so that the weight of the valve is not significantly affected.
An einem Ausführungsbeispiel wird die Erfindung näher be- schrieben. Es zeigt in The invention will be described in more detail in one embodiment. It shows in
Fig. 1 eine Schnittdarstellung des erfindungsgemäßen Fig. 1 is a sectional view of the invention
Ventils und Fig. 2 eine vergrößerte Schnittdarstellung des Kolbens.  Valve and Fig. 2 is an enlarged sectional view of the piston.
Figur 1 zeigt das Ventil, umfassend ein Gehäuse 1 mit einteilig angeformter Buchse 2 zum elektrischen Verbinden des Ventils. Das Gehäuse 1 besitzt weiter einen angeformten Flansch 3 und drei Bohrungen 3a, über die das Gehäuse 1 an einem nicht dargestellten Turbolader im Bereich der Bypassleitung 4 angeflanscht ist. In dem Gehäuse 1 ist ein Solenoid 5 mit einer Spule 6 und einem Metallstift 7 angeordnet. Der Metallstift 7 ist mit einem topfförmigen Kolben 8 aus einem Chrom-Nickel-Stahl mittels einer Nietverbindung verbunden. Eine Feder 9 spannt den Kolben 8 im unbetätigten Zustand des Solenoids 5 gegen einen Ventilsitz 10 vor, um die Bypassleitung 4 zu verschließen, so dass kein Medium von der Bypassleitung 4 in die Leitung 11 strömen kann. Die Feder 9 stützt sich dabei am Solenoid 5 und am Kolben 8 ab. Der Kolben 8 besitzt eine Wandstärke von 0,5 mm. Der Kolben 8 in Fig. 2 besitzt zwei konzentrische und parallel zur Stiftachse ausgerichtete Bereiche 12, 13, die einteilig miteinander verbunden sind, indem ein Bereich 12 durch eine 180 ° -Umlenkung in den anderen Bereich 13 übergeht. Der radial äußere Bereich 12 bildet die Mantelfläche eines topfförmigen Kolbens 8. Der radial innere Bereich 13 verhindert ein Ausknicken der Feder 9. Nach radial innen geht der Bereich 13 in einen ebenen, den Boden des Kolbens 8 bildenden Bereich 14 über. Der Bereich 14 besitzt eine Bohrung durch die der Metallstift 7 hindurchgeführt und mit dem Boden vernietet ist. Zusätzliche, im ebenen Bereich 14 vorgesehene Öffnungen 15 ermöglichen einen Druckausgleich mit dem Inneren des Ventils. Der radial äußere Bereich 12 besitzt auf seiner dem Gehäuse 1 abgewandten Seite einen umlaufenden Rand 16. An diesen Rand ist eine Dichtung 17 aus PPA angespritzt. Um ein Lösen der Dichtung 17 vom Rand zusätzlich zu verhindern, ist der Rand 16 in einem Winkel von kleiner 45° nach radial außen abgewinkelt. Es ist auch denkbar, den Verbund von Dichtung 17 und Rand 16 dadurch zu erhöhen, dass der Rand 16 Durchbrüche aufweist, die beim Umspritzen des Randes 16 mit der Dichtung 17 vom Kunststoffmaterial ausgefüllt werden. Beim Öffnen und Schließen des Ventils bewegt sich der Kolben 8 gegenüber einem zum Gehäuse 1 gehörenden Gehäuseteil 18. Das Gehäuseteil 18 weist einen radial nach innen gerichteten KragenFigure 1 shows the valve comprising a housing 1 with integrally molded socket 2 for electrically connecting the valve. The housing 1 further has an integrally formed flange 3 and three bores 3a, via which the housing 1 is flanged to a turbocharger, not shown, in the region of the bypass line 4. In the housing 1 is a solenoid 5 with a coil 6 and a Metal pin 7 is arranged. The metal pin 7 is connected to a cup-shaped piston 8 made of a chromium-nickel steel by means of a rivet connection. A spring 9 biases the piston 8 in the unactuated state of the solenoid 5 against a valve seat 10 to close the bypass line 4, so that no medium from the bypass line 4 can flow into the conduit 11. The spring 9 is supported on the solenoid 5 and on the piston 8. The piston 8 has a wall thickness of 0.5 mm. The piston 8 in Fig. 2 has two concentric and parallel to the pin axis aligned portions 12, 13 which are integrally connected to each other by a region 12 passes through a 180 ° deflection in the other region 13. The radially outer region 12 forms the lateral surface of a pot-shaped piston 8. The radially inner region 13 prevents buckling of the spring 9. After radially inward, the region 13 is in a flat, the bottom of the piston 8 forming region 14 on. The area 14 has a bore through which the metal pin 7 is passed and riveted to the ground. Additional, provided in the flat region 14 openings 15 allow pressure equalization with the interior of the valve. The radially outer region 12 has on its side facing away from the housing 1 a peripheral edge 16. At this edge, a seal 17 is injection molded from PPA. In order to additionally prevent a loosening of the seal 17 from the edge, the edge 16 is angled at an angle of less than 45 ° radially outward. It is also conceivable to increase the bond between the seal 17 and the edge 16 in that the edge 16 has openings which are filled with the seal 17 by the plastic material during the encapsulation of the edge 16. When opening and closing the valve, the piston 8 moves relative to a housing part 18 belonging to the housing 1. The housing part 18 has a radially inwardly directed collar
19 auf, auf dem eine V-förmige Dichtung 20 aufliegt. Die Dichtung19, on which a V-shaped seal 20 rests. The seal
20 wird auf der gegenüberliegenden Seite von einem Teil des Gehäuses 1 gehalten. Die radial innere Dichtlippe der Dichtung20 is held on the opposite side of a part of the housing 1. The radially inner sealing lip of the seal
20 liegt am die Mantelfläche des Kolbens 8 bildenden Bereich 12 an . 20 is located on the lateral surface of the piston 8 forming region 12 at.

Claims

Patentansprüche claims
1. Ventil mit einem Gehäuse, einem in dem Gehäuse angeordneten Solenoid, einem von dem Solenoid bewegbaren Stift, einem mit dem Stift verbundenen Kolben und einer Dichtung, dadurch gekennzeichnet, dass der Kolben (8) aus Metall besteht, zwei konzentrisch und parallel zur Stiftachse ausgerichtete Bereiche besitzt und eine Dichtung aus einem vom Kolben verschiedenen Material besitzt, wobei die Dichtung im Bodenbereich des Kolbens angeordnet ist. A valve comprising a housing, a solenoid disposed in the housing, a pin movable by the solenoid, a piston connected to the pin and a seal, characterized in that the piston (8) is made of metal, two concentric and parallel to the pin axis having aligned portions and having a seal of a material other than the piston, wherein the seal is disposed in the bottom region of the piston.
2. Ventil nach Anspruch 1, dadurch gekennzeichnet, dass der2. Valve according to claim 1, characterized in that the
Kolben aus Edelstahl, vorzugsweise einem Chrom-Nickel- Stahl, besteht. Piston made of stainless steel, preferably a chromium-nickel steel exists.
3. Ventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Dichtung aus einem Gummi, vorzugsweise EPDM, oder einem Kunststoff, vorzugsweise PPA, besteht. 3. Valve according to claim 1 or 2, characterized in that the seal consists of a rubber, preferably EPDM, or a plastic, preferably PPA.
4. Ventil nach Anspruch 3, dadurch gekennzeichnet, dass die4. Valve according to claim 3, characterized in that the
Dichtung ringförmig ausgebildet ist und einen Schlitz aufweist, in dem ein dem Gehäuse abgewandter Rand des Kolbens angeordnet ist. 5. Ventil nach Anspruch 4, dadurch gekennzeichnet, dass dieSeal is annular and has a slot in which a housing facing away from the edge of the piston is arranged. 5. Valve according to claim 4, characterized in that the
Dichtung eine Dicke von 0,3 mm bis 5 mm, vorzugsweise von 0,A thickness of 0.3 mm to 5 mm, preferably 0,
5 mm bis 3 mm, besitzt. 5 mm to 3 mm, owns.
6. Ventil nach Anspruch 3, dadurch gekennzeichnet, dass beiden konzentrisch und parallel zur Stiftachse ausgerichteten6. Valve according to claim 3, characterized in that both aligned concentrically and parallel to the pin axis
Bereiche einteilig miteinander verbunden sind. Areas are integrally connected.
7. Ventil nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der radial innere Bereich mindestens 30 %, vorzugsweise 50 % und insbesondere 80 % der7. Valve according to at least one of the preceding claims, characterized in that the radially inner region at least 30%, preferably 50% and in particular 80% of
Kolbenhöhe besitzt. Has piston height.
8. Ventil nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kolben mit dem Stift direkt verbunden, vorzugsweise geschweißt, oder vernietet ist. 8. Valve according to at least one of the preceding claims, characterized in that the piston is directly connected to the pin, preferably welded, or riveted.
9. Ventil nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Metall des Kolbens eine Dicke von 0,3 mm bis 0,8 mm, vorzugsweise von 0,4 mm bis 0,6 mm und insbesondere von 0,5 mm, besitzt. 9. Valve according to at least one of the preceding claims, characterized in that the metal of the piston has a thickness of 0.3 mm to 0.8 mm, preferably from 0.4 mm to 0.6 mm and in particular of 0.5 mm, has.
EP17821547.1A 2016-12-22 2017-12-15 Valve Withdrawn EP3559526A1 (en)

Applications Claiming Priority (2)

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DE102016226075.8A DE102016226075A1 (en) 2016-12-22 2016-12-22 Valve
PCT/EP2017/082972 WO2018114644A1 (en) 2016-12-22 2017-12-15 Valve

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US (1) US11168807B2 (en)
EP (1) EP3559526A1 (en)
JP (1) JP6821029B2 (en)
KR (1) KR20190099009A (en)
CN (1) CN110100128B (en)
DE (1) DE102016226075A1 (en)
WO (1) WO2018114644A1 (en)

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JP2020502452A (en) 2020-01-23
JP6821029B2 (en) 2021-01-27
US11168807B2 (en) 2021-11-09
US20200096129A1 (en) 2020-03-26
KR20190099009A (en) 2019-08-23
DE102016226075A1 (en) 2018-06-28
CN110100128B (en) 2021-03-16
CN110100128A (en) 2019-08-06

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