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EP2681441B1 - Valve device for controlling or metering a fluid - Google Patents

Valve device for controlling or metering a fluid Download PDF

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Publication number
EP2681441B1
EP2681441B1 EP12700461.2A EP12700461A EP2681441B1 EP 2681441 B1 EP2681441 B1 EP 2681441B1 EP 12700461 A EP12700461 A EP 12700461A EP 2681441 B1 EP2681441 B1 EP 2681441B1
Authority
EP
European Patent Office
Prior art keywords
valve device
sealing
valve
flow channel
deflector wall
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.)
Active
Application number
EP12700461.2A
Other languages
German (de)
French (fr)
Other versions
EP2681441A1 (en
Inventor
Heiko Roth
Dominik Brunner
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2681441A1 publication Critical patent/EP2681441A1/en
Application granted granted Critical
Publication of EP2681441B1 publication Critical patent/EP2681441B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • F02M59/367—Pump inlet valves of the check valve type being open when actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/462—Delivery valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0077—Valve seat details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member

Definitions

  • the invention relates to a valve device according to the preamble of claim 1 and a quantity control valve according to the independent claim.
  • Valve devices such as quantity control valves of a fuel system of an internal combustion engine, are known from the market. Often, such valve devices have a valve body which abut against a sealing section against a housing-side sealing seat and thus close the valve means.
  • the sealing seat is formed, for example, flat, cylindrical, spherical or conical.
  • pressure pulsations can occur in the hydraulic lines connected to the valve device, as a result of which liquid vapor ("vapor bubbles”) can form in the region of the sealing section or the sealing seat.
  • vapor bubbles liquid vapor
  • Kavitationserosion at surrounding portions of the housing and / or the valve body.
  • the valve device according to the invention has the advantage that the resistance in the region of a sealing seat and / or a sealing portion of the valve device is improved against cavitation erosion.
  • the flow coefficient or the pressure drop along a flow channel, as well as the valve lift, the valve switching time and the fatigue strength of the valve device remain essentially unchanged.
  • the invention is based on the consideration that a high resistance to cavitation erosion in a sealing region formed by a sealing section and a sealing seat on the one hand, and a high flow coefficient of the valve device on the other hand, can be contradictory requirements.
  • a high resistance to cavitation erosion in a sealing region formed by a sealing section and a sealing seat on the one hand, and a high flow coefficient of the valve device on the other hand can be contradictory requirements.
  • this results in closed valve means a wedge-like cross-section gap between the sealing portion and the sealing seat.
  • the bubbles of the fluid formed as a result of cavitation effects-depending on the particular pressure-are decayed last in this gap and thus comparatively quickly, as a result of which erosion of the sealing section and / or of the sealing seat can occur.
  • the valve device has a decomposition space in a flow channel immediately upstream of the sealing region when the valve device is closed.
  • a boundary wall of the decomposition space is formed by a baffle which adjoins the sealing area, wherein the baffle is tilted at least partially opposite to the sealing region normal with an angle of at most 15 ° in the flow direction to a maximum of 60 ° counter to the flow direction.
  • a further boundary wall of the decomposition space runs, for example, approximately parallel to the sealing region, so that an upstream shoulder results upstream of the sealing region.
  • An embodiment of the invention provides that the baffle is at least partially tilted against the normal to the sealing region at an angle of at most 5 ° in the flow direction to a maximum of 20 ° opposite to the flow direction, more preferably that the baffle at least partially opposite to the sealing area Normal is tilted at an angle of at most 2 ° in the flow direction to a maximum of 10 ° counter to the flow direction, even more preferred that the baffle is at least partially disposed at right angles with respect to the sealing area.
  • the invention provides that the baffle is formed on a housing of the valve device. This is. the decomposition space formed on the housing.
  • the decomposition space is inventively formed by means of a step-like recess in the housing and bounded by the impact wall formed on the housing.
  • the flow coefficient of the valve device can be improved if a boundary wall of the flow channel upstream of and close to the baffle wall has a rounding or chamfer.
  • the flow velocity in the sealing area can be further increased without the cavitation erosion increases.
  • a boundary wall of the flow channel immediately upstream of the rounding has an angle with respect to a longitudinal axis of the flow channel of a maximum of +/- 15 ° degrees.
  • the cavitation erosion can be further reduced if there is an undercut in a boundary wall of the flow channel upstream of and close to the baffle wall and / or in the baffle wall.
  • the valve device When the valve device is closed, the hydraulic end of the upstream fluid region and thus the location of the disintegration of the cavitation bubbles can be kept away from the sealing region.
  • valve body is plate-shaped, cylindrical, spherical or conical or it is a conical-cone valve.
  • the invention can be used advantageously.
  • valve device manufacture of the valve device can be simplified and cheapened if the housing is multi-part in the baffle wall.
  • the above-described diverse geometries of the valve device upstream of the sealing region can optionally be produced by separate elements and thus simpler.
  • FIG. 1 shows a fuel system 10 of an internal combustion engine in a highly simplified representation.
  • fuel is supplied via a suction line 14, by means of a prefeed pump 16, via a low-pressure line 18, and via a valve device 22 which can be actuated by an electromagnet 20 - which in the present case is a quantity control valve 22 - to a high-pressure pump 24 (not further explained here).
  • the high pressure pump 24 is connected via a high pressure line 26 to a high pressure accumulator 28.
  • Other elements, such as exhaust valves of the high-pressure pump 24 are in the FIG. 1 not drawn.
  • the valve device 22 and the quantity control valve 22 may be formed as a unit with the high-pressure pump 24.
  • the quantity control valve 22 may be an inlet valve of the high-pressure pump 24.
  • the quantity control valve 22 may also have a different actuator than the electromagnet 20, for example a piezoelectric actuator or a hydraulic actuator.
  • the prefeed pump 16 conveys fuel from the fuel tank 12 into the low-pressure line 18.
  • the quantity control valve 22 determines the quantity of fuel supplied to the delivery chamber of the high-pressure pump 24.
  • FIG. 2 shows a first embodiment of the valve device 22 of FIG. 1 in a simplified sectional view.
  • the elements of the valve device 22 shown in the drawing are designed substantially rotationally symmetrical about a longitudinal axis 29 and comprise a housing 30 with a sealing seat 32 against which a sealing portion 34 of a valve body 36 can rest when the valve device 22 is closed.
  • the valve device 22 is open, that is, the valve body 36 is lifted axially from the sealing seat 32.
  • a flow channel 38 is formed through which in the open position shown fluid fluid - in the present case fuel - flows along arrows 40.
  • the sealing seat 32 and the sealing portion 34 are flat and parallel to each other and together form a sealing region 42. Upstream of the sealing region 42 is formed by means of a step-like recess in the housing 30, a decomposition space 44, of a from the sealing region 42 and its plane is limited at right angles extending baffle 46.
  • Two dashed lines 48 along the flow channel 38 define a cross section of the flow channel 38 with a particularly high flow rate. The distance between the two dashed lines 48 is characterized by a measure 50 downstream of the sealing region 42.
  • FIG. 3 shows the valve device 22 of FIG. 2 in closed condition.
  • the valve body 36 abuts with the sealing portion 34 on the sealing seat 32, so that a flow of fluid substantially does not take place.
  • a region of vapor bubbles 54 is shown, which have formed due to cavitation effects as a result of pressure pulsations.
  • the vapor bubbles 54 rest against or are at least closely adjacent to the valve body 36 with a comparatively large area.
  • the resulting stress is distributed over a relatively large area of the valve body 36 and the baffle 46, whereby the Kavitationserosion is significantly reduced.
  • the valve device 22 in a vicinity of the vapor bubble 54 no narrowing (wedge-like) space sections, which may be particularly prone to cavitation erosion.
  • FIG. 4 shows a further embodiment of the valve device 22, wherein the decay space 44 is extended by an undercut 56.
  • the imploding vapor bubble (s) 54 can be kept even further away from the sealing region 42, thus further reducing the risk of cavitation erosion on the sealing seat 32 and on the sealing section 34.
  • FIG. 5 shows a further embodiment of the valve device 22, wherein the baffle 46 is tilted relative to a sealing region 42 and the plane normal 58 by an angle W1 of 15 ° in the flow direction.
  • the angle W1 can also be less than 15 °, whereby the valve device 22 can be even more resistant to cavitation erosion.
  • FIG. 6 shows a further embodiment of the valve device 22, wherein the baffle 46 is tilted relative to the sealing region 42 normal 58 by an angle W2 of 15 ° counter to the flow direction. This can further reduce the risk of cavitation erosion.
  • the angle W2 can also be up to 60 °. This is in the FIG. 6 but not shown.
  • FIG. 7 shows a further embodiment of the valve device 22, wherein a boundary wall of the flow channel 38 upstream of and close to the baffle 46 in place of the edge 52 has a rounding 60 with a radius R1.
  • the baffle 46 may also be tilted at a maximum of 15 ° in the flow direction or alternatively at most 60 ° counter to the direction of flow relative to the sealing region 42 normal 58. Both alternatives are in the FIG. 7 indicated by auxiliary lines.
  • a boundary wall 61 immediately upstream of the rounding 60 may be tilted with respect to the longitudinal axis 29 by an angle W3 of +/- 15 °.
  • FIG. 8 shows another embodiment of the valve device 22, wherein a boundary wall of the flow channel 38 has a chamfer 62 upstream of and close to the baffle 46 instead of the edge 52.
  • the baffle 46 can also be tilted relative to the sealing area by an angle W1 or by an angle W2 (compare the FIGS Figures 5 . 6 and 7 ).
  • FIG. 9 shows one to the FIG. 8 Comparable embodiment of the valve device 22, wherein the housing 30 is designed in several parts in the region of the baffle 46.
  • the chamfer 62 is arranged on a housing element 64.
  • FIG. 10 shows the valve device 22 in an embodiment as a conical-cone valve.
  • this embodiment is that of FIG. 2 or 3 similar.
  • the baffle 46 is oriented approximately at right angles with respect to the sealing portion 34.
  • the levels of the sealing seat 32 and the sealing portion 34 and the baffle 46 in comparison to the FIG. 2 or 3, however, by a certain angle - in this case approximately at 45 ° - tilted against the longitudinal axis 29. Accordingly, the angle at the edge 52 is approximately 135 °.
  • valve body 36 may be plate-shaped or cone-shaped. Alternatively, however, the valve body 36 may also be cylindrical or spherical, from which further variants of the valve device 22 may result.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Lift Valve (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Details Of Valves (AREA)

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Ventileinrichtung nach dem Oberbegriff des Anspruchs 1 sowie ein Mengensteuerventil nach dem nebengeordneten Patentanspruch.The invention relates to a valve device according to the preamble of claim 1 and a quantity control valve according to the independent claim.

Ventileinrichtungen, beispielsweise Mengensteuerventile eines Kraftstoffsystems einer Brennkraftmaschine, sind vom Markt her bekannt. Häufig weisen solche Ventileinrichtungen einen Ventilkörper auf, der an einem Dichtabschnitt gegen einen gehäuseseitigen Dichtsitz anschlagen und die Ventileinrichtung somit schließen kann. Der Dichtsitz ist beispielsweise flach, zylinderförmig, kugelförmig oder kegelförmig ausgebildet. In geschlossenem Zustand der Ventileinrichtung können in den an die Ventileinrichtung angeschlossenen hydraulischen Leitungen Druckpulsationen auftreten, wodurch im Bereich des Dichtabschnitts bzw. des Dichtsitzes ein Flüssigkeitsdampf ("Dampfblasen") entstehen kann. Bei der Implosion dieser Dampfblasen ergibt sich eine so genannte Kavitationserosion an umliegenden Abschnitten des Gehäuses und/oder des Ventilkörpers.Valve devices, such as quantity control valves of a fuel system of an internal combustion engine, are known from the market. Often, such valve devices have a valve body which abut against a sealing section against a housing-side sealing seat and thus close the valve means. The sealing seat is formed, for example, flat, cylindrical, spherical or conical. In the closed state of the valve device, pressure pulsations can occur in the hydraulic lines connected to the valve device, as a result of which liquid vapor ("vapor bubbles") can form in the region of the sealing section or the sealing seat. In the implosion of these vapor bubbles results in a so-called Kavitationserosion at surrounding portions of the housing and / or the valve body.

Offenbarung der ErfindungDisclosure of the invention

Das der Erfindung zugrunde liegende Problem wird durch eine Ventileinrichtung nach Anspruch 1 sowie ein Mengensteuerventil nach dem nebengeordneten Anspruch gelöst. Vorteilhafte Weiterbildungen sind in Unteransprüchen angegeben. Für die Erfindung wichtige Merkmale finden sich ferner in der nachfolgenden Beschreibung und in den Zeichnungen, wobei die Merkmale sowohl in Alleinstellung als auch in unterschiedlichen Kombinationen für die Erfindung wichtig sein können, ohne dass hierauf nochmals explizit hingewiesen wird.The problem underlying the invention is achieved by a valve device according to claim 1 and a quantity control valve according to the independent claim. Advantageous developments are specified in subclaims. For the invention important features can be further found in the following description and in the drawings, the features both alone and in different combinations for the Invention may be important, without being explicitly referred to again.

Die erfindungsgemäße Ventileinrichtung hat den Vorteil, dass die Widerstandsfähigkeit im Bereich eines Dichtsitzes und/oder eines Dichtabschnitts der Ventileinrichtung gegen Kavitationserosion verbessert wird. Dabei bleiben der Durchflussbeiwert bzw. der Druckabfall längs eines Strömungskanals, sowie der Ventilhub, die Ventilschaltzeit und die Dauerfestigkeit der Ventileinrichtung im Wesentlichen unverändert.The valve device according to the invention has the advantage that the resistance in the region of a sealing seat and / or a sealing portion of the valve device is improved against cavitation erosion. In this case, the flow coefficient or the pressure drop along a flow channel, as well as the valve lift, the valve switching time and the fatigue strength of the valve device remain essentially unchanged.

Die Erfindung geht von der Überlegung aus, dass eine hohe Widerstandsfähigkeit gegen Kavitationserosion in einem durch einen Dichtabschnitt und einen Dichtsitz gebildeten Dichtbereich einerseits, und ein hoher Durchflussbeiwert der Ventileinrichtung andererseits, gegensätzliche Anforderungen sein können. Zwar ist es möglich, mittels dem Dichtbereich stromaufwärts unmittelbar vorgelagerter Fasen oder Rundungen den Durchflussbeiwert der Ventileinrichtung - bei unverändertem Ventilhub - zu erhöhen. Doch ergibt sich dadurch bei geschlossener Ventileinrichtung ein im Querschnitt keilartiger Spalt zwischen dem Dichtabschnitt und dem Dichtsitz. Die aufgrund von Kavitationseffekten gebildeten Blasen des Fluids - abhängig von dem jeweiligen Druck - werden in diesem Spalt zuletzt und somit vergleichsweise schnell zerfallen, wodurch es zu einer Erosion des Dichtabschnitts und/oder des Dichtsitzes kommen kann.The invention is based on the consideration that a high resistance to cavitation erosion in a sealing region formed by a sealing section and a sealing seat on the one hand, and a high flow coefficient of the valve device on the other hand, can be contradictory requirements. Although it is possible by means of the sealing area upstream immediately upstream chamfers or curves to increase the flow coefficient of the valve device - with unchanged valve lift. However, this results in closed valve means a wedge-like cross-section gap between the sealing portion and the sealing seat. The bubbles of the fluid formed as a result of cavitation effects-depending on the particular pressure-are decayed last in this gap and thus comparatively quickly, as a result of which erosion of the sealing section and / or of the sealing seat can occur.

Erfindungsgemäß weist die Ventileinrichtung in einem Strömungskanal unmittelbar stromaufwärts von dem Dichtbereich bei geschlossener Ventileinrichtung einen Zerfallraum auf. Dabei wird eine Begrenzungswand des Zerfallraums von einer Prallwand gebildet, welche an den Dichtbereich angrenzt, wobei die Prallwand wenigstens bereichsweise gegenüber der zum Dichtbereich Normalen mit einem Winkel von maximal um 15° in Strömungsrichtung bis maximal um 60° entgegen der Strömungsrichtung gekippt ist. Eine weitere Begrenzungswand des Zerfallraums verläuft beispielsweise in etwa parallel zu dem Dichtbereich, so dass sich stromaufwärts von dem Dichtbereich ein vorgelagerter Absatz ergibt. Bei geöffneter Ventileinrichtung kann die Strömung bereits im Bereich des Zerfallraums in etwa parallel zum Dichtabschnitt bzw. zum Dichtsitz umgelenkt werden, so dass der Dichtbereich nahezu in seinem gesamten Querschnitt durchströmt wird.According to the invention, the valve device has a decomposition space in a flow channel immediately upstream of the sealing region when the valve device is closed. In this case, a boundary wall of the decomposition space is formed by a baffle which adjoins the sealing area, wherein the baffle is tilted at least partially opposite to the sealing region normal with an angle of at most 15 ° in the flow direction to a maximum of 60 ° counter to the flow direction. A further boundary wall of the decomposition space runs, for example, approximately parallel to the sealing region, so that an upstream shoulder results upstream of the sealing region. When the valve device is open, the flow can already in the region of the decomposition space in approximately parallel to the sealing portion or to Sealing seat are deflected, so that the sealing region is flowed through almost in its entire cross-section.

Eine Ausgestaltung der Erfindung sieht vor, dass die Prallwand wenigstens bereichsweise gegenüber der zum Dichtbereich Normalen mit einem Winkel von maximal um 5° in Strömungsrichtung bis maximal um 20° entgegen der Strömungsrichtung gekippt ist, stärker bevorzugt, dass die Prallwand wenigstens bereichsweise gegenüber der zum Dichtbereich Normalen mit einem Winkel von maximal um 2° in Strömungsrichtung bis maximal um 10° entgegen der Strömungsrichtung gekippt ist, noch stärker bevorzugt, dass die Prallwand wenigstens bereichsweise in Bezug auf den Dichtbereich rechtwinklig angeordnet ist. Damit werden Bereiche für ein räumliche Ausrichtung der Prallwand beschrieben, bei denen ein besonders günstiges Verhältnis von geringer Kavitationserosion einerseits, und einer hohen Strömungsgeschwindigkeit bzw. geringem Druckabfall längs des Strömungskanals andererseits, erreicht wird. In den genannten Winkelbereichen ist die von der Erfindung beabsichtigte Wirkung also besonders hoch.An embodiment of the invention provides that the baffle is at least partially tilted against the normal to the sealing region at an angle of at most 5 ° in the flow direction to a maximum of 20 ° opposite to the flow direction, more preferably that the baffle at least partially opposite to the sealing area Normal is tilted at an angle of at most 2 ° in the flow direction to a maximum of 10 ° counter to the flow direction, even more preferred that the baffle is at least partially disposed at right angles with respect to the sealing area. This describes areas for a spatial orientation of the baffle, in which a particularly favorable ratio of low cavitation erosion on the one hand, and a high flow velocity or low pressure drop along the flow channel on the other hand is achieved. In the aforementioned angular ranges, the effect intended by the invention is therefore particularly high.

Weiterhin sieht die Erfindung vor, dass die Prallwand an einem Gehäuse der Ventileinrichtung ausgebildet ist. Dadurch ist. der Zerfallraum am Gehäuse ausgebildet.Furthermore, the invention provides that the baffle is formed on a housing of the valve device. This is. the decomposition space formed on the housing.

Der Zerfallsraum ist erfindungsgemäß mittels einer stufenartigen Ausnehmung in dem Gehäuse gebildet und von der am Gehäuse ausgebildeten Prallwand begrenzt.The decomposition space is inventively formed by means of a step-like recess in the housing and bounded by the impact wall formed on the housing.

Der Durchflussbeiwert der Ventileinrichtung kann verbessert werden, wenn eine Begrenzungswand des Strömungskanals stromaufwärts von und nahe zu der Prallwand eine Rundung oder eine Fase aufweist. Damit kann die Strömungsgeschwindigkeit im Dichtbereich weiter erhöht werden, ohne dass die Kavitationserosion zunimmt.The flow coefficient of the valve device can be improved if a boundary wall of the flow channel upstream of and close to the baffle wall has a rounding or chamfer. Thus, the flow velocity in the sealing area can be further increased without the cavitation erosion increases.

Weiterhin ist vorgesehen, dass eine Begrenzungswand des Strömungskanals unmittelbar stromaufwärts von der Rundung einen Winkel gegenüber einer Längsachse des Strömungskanals von maximal +/- 15° Grad aufweist. Dadurch wird eine besonders geeignete Geometrie der Ventileinrichtung beschrieben.Furthermore, it is provided that a boundary wall of the flow channel immediately upstream of the rounding has an angle with respect to a longitudinal axis of the flow channel of a maximum of +/- 15 ° degrees. As a result, a particularly suitable geometry of the valve device is described.

Die Kavitationserosion kann weiter vermindert werden, wenn in einer Begrenzungswand des Strömungskanals stromaufwärts von und nahe zu der Prallwand und/oder in der Prallwand ein Hinterschnitt vorhanden ist. Bei geschlossener Ventileinrichtung kann das hydraulische Ende des stromaufwärts gelegenen Fluidbereichs und somit der Ort des Zerfalls der Kavitationsblasen besonders weit von dem Dichtbereich ferngehalten werden. Je größer und/oder je tiefer der Hinterschnitt angelegt ist, um so geringer ist im Allgemeinen die Kavitationserosion.The cavitation erosion can be further reduced if there is an undercut in a boundary wall of the flow channel upstream of and close to the baffle wall and / or in the baffle wall. When the valve device is closed, the hydraulic end of the upstream fluid region and thus the location of the disintegration of the cavitation bubbles can be kept away from the sealing region. The larger and / or the lower the undercut is applied, the lower is generally the cavitation erosion.

Weitere Ausgestaltungen sehen vor, dass der Ventilkörper plattenförmig, zylindrisch, kugelförmig oder kegelförmig ausgebildet ist oder es sich um ein Kegel-Kegel-Ventil handelt. Für diese Geometrien des Ventilkörpers bzw. der Ventileinrichtung kann die Erfindung vorteilhaft verwendet werden.Further embodiments provide that the valve body is plate-shaped, cylindrical, spherical or conical or it is a conical-cone valve. For these geometries of the valve body or the valve device, the invention can be used advantageously.

Die Herstellung der Ventileinrichtung kann vereinfacht und verbilligt werden, wenn das Gehäuse im Bereich der Prallwand mehrteilig ist. Dadurch können die oben beschriebenen vielfältigen Geometrien der Ventileinrichtung stromaufwärts des Dichtbereichs gegebenenfalls durch separate Elemente und damit einfacher hergestellt werden.The manufacture of the valve device can be simplified and cheapened if the housing is multi-part in the baffle wall. As a result, the above-described diverse geometries of the valve device upstream of the sealing region can optionally be produced by separate elements and thus simpler.

Nachfolgend werden beispielhafte Ausführungsformen der Erfindung unter Bezugnahme auf die Zeichnung erläutert. In der Zeichnung zeigen:

Figur 1
ein vereinfachtes Schema eines Kraftstoffsytems mit einer Kraftstoffpumpe und einer Ventileinrichtung ;
Figur 2
eine vereinfachte Schnittdarstellung einer ersten Ausführungsform der Ventileinrichtung von Figur 1 in geöffnetem Zustand;
Figur 3
die Ventileinrichtung von Figur 2 in geschlossenem Zustand;
Figur 4
eine vereinfachte Schnittdarstellung einer zweiten Ausführungsform der Ventileinrichtung;
Figur 5
eine vereinfachte Schnittdarstellung einer dritten Ausführungsform der Ventileinrichtung;
Figur 6
eine vereinfachte Schnittdarstellung einer vierten Ausführungsform der Ventileinrichtung;
Figur 7
eine vereinfachte Schnittdarstellung einer fünften Ausführungsform der Ventileinrichtung;
Figur 8
eine vereinfachte Schnittdarstellung einer sechsten Ausführungsform der Ventileinrichtung;
Figur 9
eine vereinfachte Schnittdarstellung einer siebten Ausführungsform der Ventileinrichtung;
Figur 10
eine vereinfachte Schnittdarstellung einer achten Ausführungsform der Ventileinrichtung.
Hereinafter, exemplary embodiments of the invention will be explained with reference to the drawings. In the drawing show:
FIG. 1
a simplified schematic of a Kraftstoffsytems with a fuel pump and a valve device;
FIG. 2
a simplified sectional view of a first embodiment of the valve device of FIG. 1 in open condition;
FIG. 3
the valve device of FIG. 2 in closed condition;
FIG. 4
a simplified sectional view of a second embodiment of the valve device;
FIG. 5
a simplified sectional view of a third embodiment of the valve device;
FIG. 6
a simplified sectional view of a fourth embodiment of the valve device;
FIG. 7
a simplified sectional view of a fifth embodiment of the valve device;
FIG. 8
a simplified sectional view of a sixth embodiment of the valve device;
FIG. 9
a simplified sectional view of a seventh embodiment of the valve device;
FIG. 10
a simplified sectional view of an eighth embodiment of the valve device.

Es werden für funktionsäquivalente Elemente und Größen in allen Figuren auch bei unterschiedlichen Ausführungsformen die gleichen Bezugszeichen verwendet.The same reference numerals are used for functionally equivalent elements and sizes in all figures, even in different embodiments.

Figur 1 zeigt ein Kraftstoffsystem 10 einer Brennkraftmaschine in einer stark vereinfachten Darstellung. Aus einem Kraftstofftank 12 wird Kraftstoff über eine Saugleitung 14, mittels einer Vorförderpumpe 16, über eine Niederdruckleitung 18, und über eine von einem Elektromagneten 20 betätigbare Ventileinrichtung 22 - welche vorliegend ein Mengensteuerventil 22 ist - einer (hier nicht weiter erläuterten) Hochdruckpumpe 24 zugeführt. Stromabwärts ist die Hochdruckpumpe 24 über eine Hochdruckleitung 26 an einen Hochdruckspeicher 28 angeschlossen. Sonstige Elemente, wie beispielsweise Auslassventile der Hochdruckpumpe 24, sind in der Figur 1 nicht gezeichnet. Es versteht sich, dass die Ventileinrichtung 22 bzw. das Mengensteuerventil 22 als Baueinheit mit der Hochdruckpumpe 24 ausgebildet sein kann. Beispielsweise kann das Mengensteuerventil 22 ein Einlassventil der Hochdruckpumpe 24 sein. Außerdem kann das Mengensteuerventil 22 auch eine andere Betätigungseinrichtung als den Elektromagneten 20 aufweisen, beispielsweise einen Piezoaktor oder eine hydraulische Betätigung. FIG. 1 shows a fuel system 10 of an internal combustion engine in a highly simplified representation. From a fuel tank 12, fuel is supplied via a suction line 14, by means of a prefeed pump 16, via a low-pressure line 18, and via a valve device 22 which can be actuated by an electromagnet 20 - which in the present case is a quantity control valve 22 - to a high-pressure pump 24 (not further explained here). Downstream, the high pressure pump 24 is connected via a high pressure line 26 to a high pressure accumulator 28. Other elements, such as exhaust valves of the high-pressure pump 24 are in the FIG. 1 not drawn. It is understood that the valve device 22 and the quantity control valve 22 may be formed as a unit with the high-pressure pump 24. For example, the quantity control valve 22 may be an inlet valve of the high-pressure pump 24. In addition, the quantity control valve 22 may also have a different actuator than the electromagnet 20, for example a piezoelectric actuator or a hydraulic actuator.

Beim Betrieb des Kraftstoffsystems 10 fördert die Vorförderpumpe 16 Kraftstoff vom Kraftstofftank 12 in die Niederdruckleitung 18. Dabei bestimmt das Mengensteuerventil 22 die dem Förderraum der Hochdruckpumpe 24 zugeführte Kraftstoffmenge.During operation of the fuel system 10, the prefeed pump 16 conveys fuel from the fuel tank 12 into the low-pressure line 18. The quantity control valve 22 determines the quantity of fuel supplied to the delivery chamber of the high-pressure pump 24.

Figur 2 zeigt eine erste Ausführungsform der Ventileinrichtung 22 von Figur 1 in einer vereinfachten Schnittdarstellung. Die in der Zeichnung dargestellten Elemente der Ventileinrichtung 22 sind im Wesentlichen rotationsymmetrisch um eine Längsachse 29 ausgeführt und umfassen ein Gehäuse 30 mit einem Dichtsitz 32, an dem ein Dichtabschnitt 34 eines Ventilkörpers 36 bei geschlossener Ventileinrichtung 22 anliegen kann. In der Figur 2 ist die Ventileinrichtung 22 jedoch geöffnet, das heißt, der Ventilkörper 36 ist von dem Dichtsitz 32 axial abgehoben. In der Ventileinrichtung 22 ist ein Strömungskanal 38 ausgebildet, durch den in der gezeigten Offenstellung Fluid - vorliegend Kraftstoff - entlang von Pfeilen 40 strömt. FIG. 2 shows a first embodiment of the valve device 22 of FIG. 1 in a simplified sectional view. The elements of the valve device 22 shown in the drawing are designed substantially rotationally symmetrical about a longitudinal axis 29 and comprise a housing 30 with a sealing seat 32 against which a sealing portion 34 of a valve body 36 can rest when the valve device 22 is closed. In the FIG. 2 However, the valve device 22 is open, that is, the valve body 36 is lifted axially from the sealing seat 32. In the valve device 22, a flow channel 38 is formed through which in the open position shown fluid fluid - in the present case fuel - flows along arrows 40.

Der Dichtsitz 32 und der Dichtabschnitt 34 sind flächig und parallel zueinander ausgeführt und bilden gemeinsam einen Dichtbereich 42. Stromaufwärts von dem Dichtbereich 42 ist mittels einer stufenartigen Ausnehmung in dem Gehäuse 30 ein Zerfallraum 44 gebildet, der von einer sich vom Dichtbereich 42 bzw. dessen Ebene rechtwinklig erstreckenden Prallwand 46 begrenzt wird. Zwei gestrichelte Linien 48 entlang des Strömungskanals 38 umgrenzen einen Querschnitt des Strömungskanals 38 mit besonders hoher Strömungsgeschwindigkeit. Der Abstand der beiden gestrichelten Linien 48 ist stromabwärts des Dichtbereichs 42 durch ein Maß 50 charakterisiert.The sealing seat 32 and the sealing portion 34 are flat and parallel to each other and together form a sealing region 42. Upstream of the sealing region 42 is formed by means of a step-like recess in the housing 30, a decomposition space 44, of a from the sealing region 42 and its plane is limited at right angles extending baffle 46. Two dashed lines 48 along the flow channel 38 define a cross section of the flow channel 38 with a particularly high flow rate. The distance between the two dashed lines 48 is characterized by a measure 50 downstream of the sealing region 42.

Man erkennt, dass entsprechend den Pfeilen 40 der Kraftstoff in der Zeichnung der Figur 2 im Wesentlichen von links nach rechts strömt, wobei die Strömung zuerst in etwa horizontal verläuft und danach vor dem Ventilkörper 36 radial nach außen umgelenkt wird. Die Umlenkung der Strömung erfolgt stromabwärts einer Kante 52 vergleichsweise frühzeitig und verlustarm mittels der hydraulischen Wirkung des Zerfallraums 44. Das Maß 50 ist nur wenig kleiner als der axiale Abstand zwischen dem Dichtsitz 32 und dem Dichtabschnitt 34, so dass der Kraftstoff vergleichsweise schnell durch den Dichtbereich 42 strömen kann und der Durchflussbeiwert der Ventileinrichtung 22 entsprechend gut ist.It can be seen that according to the arrows 40 of the fuel in the drawing of FIG. 2 flows substantially from left to right, wherein the flow first extends approximately horizontally and is then deflected radially in front of the valve body 36 to the outside. The deflection of the flow takes place downstream of an edge 52 comparatively early and low loss by means of the hydraulic effect of Zerfallraums 44. The measure 50 is only slightly smaller than the axial distance between the sealing seat 32 and the sealing portion 34 so that the fuel comparatively quickly through the sealing area 42 can flow and the flow coefficient of the valve device 22 is correspondingly good.

Figur 3 zeigt die Ventileinrichtung 22 von Figur 2 in geschlossenem Zustand. Der Ventilkörper 36 liegt mit dem Dichtabschnitt 34 an dem Dichtsitz 32 an, so dass ein Durchströmen von Fluid im Wesentlichen nicht stattfindet. In einem Endbereich des Strömungskanals 38 in der Zeichnung links von dem Ventilkörper 36 ist ein Bereich mit Dampfblasen 54 dargestellt, welche sich aufgrund von Kavitationseffekten als Folge von Druckpulsationen gebildet haben. Die Dampfblasen 54 liegen mit einer vergleichsweise großen Fläche an dem Ventilkörper 36 an oder sind diesem zumindest eng benachbart. FIG. 3 shows the valve device 22 of FIG. 2 in closed condition. The valve body 36 abuts with the sealing portion 34 on the sealing seat 32, so that a flow of fluid substantially does not take place. In an end region of the flow channel 38 in the drawing to the left of the valve body 36, a region of vapor bubbles 54 is shown, which have formed due to cavitation effects as a result of pressure pulsations. The vapor bubbles 54 rest against or are at least closely adjacent to the valve body 36 with a comparatively large area.

Beim Implodieren der Dampfblasen 54 verteilt sich die dabei entstehende Beanspruchung auf eine relativ große Fläche des Ventilkörpers 36 beziehungsweise der Prallwand 46, wodurch die Kavitationserosion deutlich reduziert wird. Insbesondere weist die Ventileinrichtung 22 in einer Umgebung der Dampfblase 54 keine sich verengenden (keilartigen) Raumabschnitte auf, welche gegebenenfalls besonders anfällig für Kavitationserosion sind.When imploding the vapor bubbles 54, the resulting stress is distributed over a relatively large area of the valve body 36 and the baffle 46, whereby the Kavitationserosion is significantly reduced. In particular, the valve device 22 in a vicinity of the vapor bubble 54, no narrowing (wedge-like) space sections, which may be particularly prone to cavitation erosion.

Figur 4 zeigt eine weitere Ausführungsform der Ventileinrichtung 22, wobei der Zerfallraum 44 durch einen Hinterschnitt 56 erweitert ist. Auf diese Weise kann bzw. können die implodierende(n) Dampfblase(n) 54 noch weiter vom Dichtbereich 42 ferngehalten und somit die Gefahr der Kavitationserosion am Dichtsitz 32 und am Dichtabschnitt 34 noch weiter vermindert werden. FIG. 4 shows a further embodiment of the valve device 22, wherein the decay space 44 is extended by an undercut 56. In this way, the imploding vapor bubble (s) 54 can be kept even further away from the sealing region 42, thus further reducing the risk of cavitation erosion on the sealing seat 32 and on the sealing section 34.

Figur 5 zeigt eine weitere Ausführungsform der Ventileinrichtung 22, wobei die Prallwand 46 gegenüber einer zum Dichtbereich 42 bzw. dessen Ebene Normalen 58 um einen Winkel W1 von 15° in Strömungsrichtung gekippt ist. Dadurch ergeben sich zusätzliche Möglichkeiten, um die Strömung des Fluids zu lenken und die Gefahr von Kavitationserosion zu vermindern. Der Winkel W1 kann auch weniger als 15° betragen, wodurch die Ventileinrichtung 22 noch widerstandsfähiger gegen Kavitationserosion sein kann. Dies ist in der Figur 5 jedoch nicht gezeigt.
Figur 6 zeigt eine weitere Ausführungsform der Ventileinrichtung 22, wobei die Prallwand 46 gegenüber der zum Dichtbereich 42 Normalen 58 um einen Winkel W2 von 15° entgegen der Strömungsrichtung gekippt ist. Dadurch kann die Gefahr von Kavitationserosion noch weiter vermindert werden. Der Winkel W2 kann auch bis zu 60° betragen. Dies ist in der Figur 6 jedoch nicht gezeigt. FIG. 5 shows a further embodiment of the valve device 22, wherein the baffle 46 is tilted relative to a sealing region 42 and the plane normal 58 by an angle W1 of 15 ° in the flow direction. This provides additional opportunities to direct the flow of fluid and reduce the risk of cavitation erosion. The angle W1 can also be less than 15 °, whereby the valve device 22 can be even more resistant to cavitation erosion. This is in the FIG. 5 but not shown.
FIG. 6 shows a further embodiment of the valve device 22, wherein the baffle 46 is tilted relative to the sealing region 42 normal 58 by an angle W2 of 15 ° counter to the flow direction. This can further reduce the risk of cavitation erosion. The angle W2 can also be up to 60 °. This is in the FIG. 6 but not shown.

Figur 7 zeigt eine weitere Ausführungsform der Ventileinrichtung 22, wobei eine Begrenzungswand des Strömungskanals 38 stromaufwärts von und nahe zu der Prallwand 46 an Stelle der Kante 52 eine Rundung 60 mit einem Radius R1 aufweist. FIG. 7 shows a further embodiment of the valve device 22, wherein a boundary wall of the flow channel 38 upstream of and close to the baffle 46 in place of the edge 52 has a rounding 60 with a radius R1.

Die Prallwand 46 kann auch gegenüber der zum Dichtbereich 42 Normalen 58 maximal um 15° in Strömungsrichtung oder alternativ maximal um 60° entgegen der Strömungsrichtung gekippt sein. Beide Alternativen sind in der Figur 7 durch Hilfslinien angedeutet. Eine Begrenzungswand 61 unmittelbar stromaufwärts der Rundung 60 kann in Bezug auf die Längsachse 29 um einen Winkel W3 von +/- 15° gekippt sein.The baffle 46 may also be tilted at a maximum of 15 ° in the flow direction or alternatively at most 60 ° counter to the direction of flow relative to the sealing region 42 normal 58. Both alternatives are in the FIG. 7 indicated by auxiliary lines. A boundary wall 61 immediately upstream of the rounding 60 may be tilted with respect to the longitudinal axis 29 by an angle W3 of +/- 15 °.

Figur 8 zeigt eine weitere Ausführungsform der Ventileinrichtung 22, wobei eine Begrenzungswand des Strömungskanals 38 stromaufwärts von und nahe zu der Prallwand 46 an Stelle der Kante 52 eine Fase 62 aufweist. Dabei kann die Prallwand 46 gegenüber dem Dichtbereich ebenfalls um einen Winkel W1 beziehungsweise um einen Winkel W2 gekippt sein (vergleiche die Figuren 5, 6 und 7). FIG. 8 FIG. 12 shows another embodiment of the valve device 22, wherein a boundary wall of the flow channel 38 has a chamfer 62 upstream of and close to the baffle 46 instead of the edge 52. In this case, the baffle 46 can also be tilted relative to the sealing area by an angle W1 or by an angle W2 (compare the FIGS Figures 5 . 6 and 7 ).

Figur 9 zeigt eine zu der Figur 8 vergleichbare Ausführungsform der Ventileinrichtung 22, wobei das Gehäuse 30 im Bereich der Prallwand 46 mehrteilig ausgeführt ist. Vorliegend ist die Fase 62 an einem Gehäuseelement 64 angeordnet. FIG. 9 shows one to the FIG. 8 Comparable embodiment of the valve device 22, wherein the housing 30 is designed in several parts in the region of the baffle 46. In the present case, the chamfer 62 is arranged on a housing element 64.

Figur 10 zeigt die Ventileinrichtung 22 in einer Ausführung als Kegel-Kegel-Ventil. In einer Umgebung des Dichtbereichs 42 ist diese Ausführungsform jener von Figur 2 bzw. 3 ähnlich. Insbesondere ist die Prallwand 46 in Bezug auf den Dichtabschnitt 34 in etwa rechtwinklig ausgerichtet. In der Figur 10 sind die Ebenen des Dichtsitzes 32 und des Dichtabschnitts 34 sowie die Prallwand 46 im Vergleich zu der Figur 2 bzw. 3 jedoch um einen bestimmten Winkel - vorliegend in etwa um 45° - gegen die Längsachse 29 gekippt. Entsprechend beträgt auch der Winkel an der Kante 52 in etwa 135°. FIG. 10 shows the valve device 22 in an embodiment as a conical-cone valve. In an environment of the sealing portion 42, this embodiment is that of FIG. 2 or 3 similar. In particular, the baffle 46 is oriented approximately at right angles with respect to the sealing portion 34. In the FIG. 10 are the levels of the sealing seat 32 and the sealing portion 34 and the baffle 46 in comparison to the FIG. 2 or 3, however, by a certain angle - in this case approximately at 45 ° - tilted against the longitudinal axis 29. Accordingly, the angle at the edge 52 is approximately 135 °.

Die in den Figuren 2 bis 10 dargestellten Ausführungen sind zumindest teilweise miteinander kombinierbar und ermöglichen somit eine Vielzahl von Varianten der Ventileinrichtung 22. Wie dargestellt kann der Ventilkörper 36 plattenförmig oder kegelförmig ausgebildet sein. Alternativ kann der Ventilkörper 36 jedoch auch zylindrisch oder kugelförmig ausgebildet sein, woraus sich nochmals weitere Varianten der Ventileinrichtung 22 ergeben können.The in the FIGS. 2 to 10 As shown, the valve body 36 may be plate-shaped or cone-shaped. Alternatively, however, the valve body 36 may also be cylindrical or spherical, from which further variants of the valve device 22 may result.

Claims (8)

  1. Valve device (22) for controlling or metering a fluid, having a housing (30), a flow channel (38), and a valve body (36) which is arranged in the flow channel (38) and has a sealing section (34) which, when the valve device (22) is closed, bears against a housingside sealing seat (32), the sealing section (34) and sealing seat (32) together forming a sealing region (42), characterized in that, when the valve device (22) is closed, there is a decaying space (44), formed by means of a step-like recess in the housing (30), in the flow channel (38) immediately upstream of the sealing region (42), which decaying space (44) is delimited by a deflector wall (46) formed on the housing (30), the deflector wall (46) being tilted at least in regions with respect to the normal (58) to the sealing region (42) at an angle of from at most 15° in the flow direction (40) to at most 60° counter to the flow direction (40).
  2. Valve device (22) according to Claim 1, characterized in that the deflector wall (46) is tilted at least in regions with respect to the normal (58) to the sealing region (42) at an angle of from at most 5 ° in the flow direction (40) to at least 20° counter to the flow direction (40), more preferably that the deflector wall (46) is tilted at least in regions with respect to the normal (58) to the sealing region (42) at an angle of from at most 2° in the flow direction (40) to at most 10° counter to the flow direction (40), and even more preferably that the deflector wall (46) is arranged at least in regions at a right angle in relation to the sealing region (42).
  3. Valve device (22) according to at least one of the preceding claims, characterized in that a bounding wall of the flow channel (38) has a rounded portion (60) or a bevel (62) upstream of and close to the deflector wall (46).
  4. Valve device (22) according to Claim 3, characterized in that a bounding wall (61) of the flow channel (38) immediately upstream of the rounded portion (60) has an angle (W3) with respect to a longitudinal axis (29) of the flow channel (38) of at most ± 15°.
  5. Valve device (22) according to at least one of the preceding claims, characterized in that there is an undercut (56, 66) in a bounding wall of the flow channel (38) upstream of and close to the deflector wall (46) and/or in the deflector wall (46).
  6. Valve device (22) according to one of the preceding claims, characterized in that the valve body (36) is of plate-shaped, cylindrical, spherical or conical configuration or that it is a double cone valve.
  7. Valve device (22) according to one of the preceding claims, characterized in that the housing (30) is in multiple pieces in the region of the deflector wall (46).
  8. Quantity control valve of a fuel system of an internal combustion engine, characterized in that it comprises a valve device (22) according to at least one of the preceding claims.
EP12700461.2A 2011-03-02 2012-01-04 Valve device for controlling or metering a fluid Active EP2681441B1 (en)

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DE102011004993A DE102011004993A1 (en) 2011-03-02 2011-03-02 Valve device for switching or metering a fluid
PCT/EP2012/050093 WO2012116850A1 (en) 2011-03-02 2012-01-04 Valve device for controlling or metering a fluid

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US10393079B2 (en) 2019-08-27
WO2012116850A1 (en) 2012-09-07
US20140048043A1 (en) 2014-02-20
JP2014506976A (en) 2014-03-20
ES2628064T3 (en) 2017-08-01
KR101504495B1 (en) 2015-03-20
DE102011004993A1 (en) 2012-09-06
CN103403337A (en) 2013-11-20
CN103403337B (en) 2017-06-06
JP5826295B2 (en) 2015-12-02
EP2681441A1 (en) 2014-01-08
KR20140007421A (en) 2014-01-17

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