EP3014110B1 - Soupape de régulation de pression comprenant une chicane - Google Patents

Soupape de régulation de pression comprenant une chicane Download PDF

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Publication number
EP3014110B1
EP3014110B1 EP14720618.9A EP14720618A EP3014110B1 EP 3014110 B1 EP3014110 B1 EP 3014110B1 EP 14720618 A EP14720618 A EP 14720618A EP 3014110 B1 EP3014110 B1 EP 3014110B1
Authority
EP
European Patent Office
Prior art keywords
valve
pin
pressure regulating
regulating valve
needle
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.)
Not-in-force
Application number
EP14720618.9A
Other languages
German (de)
English (en)
Other versions
EP3014110A1 (fr
Inventor
Dietmar Uhlmann
Alexander Wernau
Vittorio Caroli
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
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3014110A1 publication Critical patent/EP3014110A1/fr
Application granted granted Critical
Publication of EP3014110B1 publication Critical patent/EP3014110B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/023—Means for varying pressure in common rails
    • F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
    • F02M63/025—Means for varying pressure in common rails by bleeding fuel pressure from the common rail
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic 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
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0043—Two-way 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/005—Pressure relief valves
    • F02M63/0052—Pressure relief valves with means for adjusting the opening pressure, e.g. electrically controlled

Definitions

  • the invention relates to a pressure control valve, which is used for example in a fuel supply system of a vehicle.
  • pressure control valves are used, for example, to regulate a pressure in a high pressure region of a common rail injection system at a certain level.
  • a pressure control valve typically includes an actuator in the form of a solenoid that can move a valve pin in a valve pin bore and that holds a valve member, such as a valve ball, in a valve seat by the magnetic force to close the pressure control valve ,
  • a pressure control valve is out of DE 10 2010 043 092 A1 known.
  • WO 2004/083695 A1 a pressure relief valve is known in which the valve piston has a plurality of side channels.
  • a pressure regulating valve can have an axial inlet opening and an outlet opening, through which a fluid can enter the pressure regulating valve and leave it again.
  • the outflow opening can be connected via the valve pin space with the inlet opening, which can lead to a relatively complicated geometry for the connection between the inlet opening and outlet opening. This can lead to turbulence and friction losses in the fluid.
  • the invention relates to a pressure control valve, which can be installed, for example, in the housing of a high pressure pump of a common rail injection system.
  • the pressure regulating valve comprises a housing with an inlet opening and an outlet opening; a valve pin guided in the housing; a valve member (eg, a valve ball) at one end of the valve pin adapted to close a valve seat upon movement of the valve pin so that fluid flow between the input port and the discharge port is interrupted.
  • the valve pin is divided into an anchor pin and a valve needle, wherein the anchor pin has a hollow channel and the valve needle at least one side channel, so that when the pressure control valve is open, the fluid flow from the input port through the side channel into the hollow channel and from there into the discharge port.
  • the one or more side channels may be, for example, longitudinal grooves.
  • the pressure regulating valve comprises an actuator for moving the valve pin, which is designed to exert a force on the anchor pin.
  • the actuator may, for example, be a coil or an electromagnet which can move the anchor pin in the direction of the valve seat by means of a valve armature.
  • the valve needle can be supported on the anchor pin (for example via an intermediate element or a cap on the anchor pin) and be moved by it.
  • valve needle has a larger diameter than the anchor pin. In this way, an axial fluid flow through the side channel can be converted into an axial fluid flow in the hollow channel without much lateral movement.
  • the valve needle has at least three axial side channels. The side channels or longitudinal grooves can be arranged symmetrically to a central axis of the valve needle.
  • the anchor pin is guided in a first housing part and the valve needle in a second housing part.
  • the two housing parts can be plugged into each other.
  • the second housing part embrace the first.
  • the function of guiding the valve needle and the function of the valve body in a single component (the second housing part) can be summarized.
  • a shim for adjusting the distance of the valve tip from the valve seat may be arranged.
  • the pressure regulating valve comprises a deflecting cap or anchor pin cap for the fluid flow, which is arranged between the anchor pin and the valve needle.
  • the deflection cap can thereby lead the outflow of the fluid as lossless as possible from the outside (ie from the side channels) inwards (ie to the hollow channel).
  • the deflection cap ensures the transmission of the axial force between the anchor pin and the valve needle.
  • the deflection cap can, as an interface between anchor pin and valve needle, on the one hand enable a transmission of the magnetic force in the axial direction onto the valve ball.
  • the deflection cap allow the pressure loss-minimized axial Nieder Kunststoffabströmung of the outer side channels of the valve needle inwardly into the tubular anchoring needle.
  • the deflection cap is attached to the anchor pin and supported on the valve needle.
  • the deflecting cap can be placed on the front side of the anchoring needle and / or can be pressed onto the valve needle.
  • the Umlenkkappe may have a plate-shaped projection, with which it is supported on an end face of the valve needle.
  • the deflection cap is fastened by means of a groove connection to the anchor pin.
  • the deflecting cap can be fastened with a circumferential groove on the anchor pin.
  • the deflecting cap and the anchor pin may have the same outer diameter, so that the deflecting cap can be guided together with the anchor pin in the first housing part.
  • the deflection cap on an annular outer wall, the interior of which is divided by radial webs in at least two passage openings.
  • the deflection cap can have five webs and thus five through-openings.
  • the webs or passage openings can be arranged symmetrically to a central axis of the deflection cap.
  • the passage openings extend obliquely to an axial direction. In this way, the axial flow can be deflected by the one or more side channels of the valve needle in the axial flow in the hollow channel.
  • a projection between the passage openings can be provided on an input side in the middle, on which the Umlenkkappe can be supported.
  • the webs have a teardrop-shaped cross-section in the axial direction. This too can reduce friction losses in the fluid flow.
  • the deflection cap is formed with a two-part pressing tool.
  • the deflection cap in MIM technology MIM: Metal Injection Molding
  • the deflection cap can be designed so that it is demoldable with only two axially movable tools.
  • Fig. 1 12 shows a longitudinal section through a pressure regulating valve 10 which comprises a multi-part pressure pin 12 which can be pressed by magnetic force against a valve seat 14 to allow fluid (such as fuel for a vehicle) to flow from an inlet opening 16 into an outlet opening 18 to prevent.
  • fluid such as fuel for a vehicle
  • the valve pin 12 has a first valve pin part 12a and an anchor pin 12a and a second valve pin part 12b and a valve needle 12b, which are arranged one behind the other in a multi-part housing 20, are guided by this in an axial direction A and axially in the axial direction A. aligned.
  • the anchor pin 12a is guided in a first housing part 20a and the valve needle 12b in a second housing part 20b or valve body 20b, wherein the valve body 20a is attached to the first housing part 20a.
  • an actuator 22 in the form of the armature needle 12a enclosing coil 22 is arranged, which generates a magnetic field when energized, which acts on an armature plate 24 which is attached to one end of the armature needle 12a and substantially orthogonal to the axial direction A.
  • the anchoring needle 12a is arranged.
  • the anchor plate 24 is disposed in an opening 26 in the housing 20, which is closed by a valve cover 28 which is inserted into the opening 26.
  • the valve cover 28 provides the axial outflow opening 18, which is opposite to the axial inlet opening 16.
  • the valve cover 28 has an electrical interface 32, in which electrical contacts 34, such as plug pins, for energizing the coil 22 are arranged.
  • the valve seat 14 is formed in the valve body 20b, for example in the form of a conical seat.
  • the valve seat 14 is located in the axial direction A opposite a tip 38 of the valve needle 12b, on which a valve ball 36 is located.
  • the inlet opening 16, which opens into the valve seat 14 and extends through the valve body 20b in the axial direction A, is covered with a cup-shaped filter 40 which is fixed to the valve body 20b.
  • the pressure regulating valve 10 can be fastened by means of the valve body 20b in a rail tube 44 of a common rail system.
  • a shim 42 is arranged, with which the distance between the valve tip 38 and the valve seat 14 can be adjusted in the axial direction.
  • the Fig. 2 shows a part of the Fig. 1 increased.
  • a deflection cap 46 is attached, which is discontinued at one end of the valve needle 12b.
  • valve spring 46 see Fig. 1
  • the armature plate 24 together with the anchor pin 12a in the axial direction A from the valve seat 14 away.
  • the valve needle 12b with the valve ball 36 is also moved in this direction so that it remains deposited on the deflection cap 46.
  • the anchor pin 12a is hollow or tubular and has a hollow channel 47 in its interior.
  • the valve needle 12b has lateral, axial channels 48 or grooves 48.
  • the deflection cap 46 is designed to divert a fluid flow from the side channels 48 into the hollow channel 47 of the anchor pin 12a.
  • fluid can now flow in a substantially axial fluid flow 50 out of the inlet opening 16 past the valve ball 36, through the side channels 48, is then deflected by the deflection cap 46 into the hollow channel 47 of the anchor pin 12a, in the direction of the outflow opening 18 to stream.
  • the armature plate 24 and the armature pin 12a are moved toward the valve seat 14 in the axial direction A by the coil 22 attracting the armature plate 24 and thus exerting a force on the valve seat 22.
  • the force exerted by the valve ball 38 on the valve seat 14 force is greater than that caused by the pressure of the fluid in the input port 16 counterforce, the valve 10 remains closed.
  • FIGS. 3A and 3B show the components of the valve pin 12 in two perspective views.
  • the valve needle 12b has three side channels 48 which extend in the axial direction A.
  • Each of the side channels 48 has a circular segment-shaped cross section.
  • the cross section of the side channels 48 widens in such a way that they touch the valve ball 46.
  • the Umlenkkappe 46 is inserted by means of a groove connection 52 on the anchor pin 12a.
  • the deflection cap 46 and the anchor pin 12a have the same outer diameter, which is smaller than the outer diameter of the valve needle 12b.
  • the deflection cap 46 is shown in different views.
  • the Umlenkkappe 46 has an annular outer wall 54 with outer diameter D 1 (for example, 5 mm), the upper end (ie closer to the anchor pin 12a) has a large inner diameter D 2 (for example, 4 mm) and further inside a smaller inner diameter D 3 (for example, 3 mm), which correspond to the outer and inner diameter of the anchor pin 12.
  • the diameter D 2 with height h 4 (for example, 1 mm) allows the centering of the anchor pin 12 a to the valve needle 12 b.
  • the heights of the deflection cap 46 in the axial direction A are h 1 (for example 2.8 mm), h 2 (for example 0.4 mm), h 3 (for example 0.4 mm), h 4 (for example 1 mm) and h 5 ( for example, 0.7 mm).
  • the interior of the deflection cap 46 is subdivided by radial webs 56 into five passage openings 58. At the diameter D 5 (for example, 0.3 mm), the five webs 56 converge in the circumferential direction.
  • the passage openings 58 are formed for the fluid, which extend obliquely to an axial direction A.
  • the fluid is conducted from radially outside to radially inside.
  • the connection of the webs 56 to the outer cylindrical wall 54 of the Umlenkkappe 46 takes place.
  • the radii of curvature R 3 are selected, for example, to 0.1 mm.
  • the webs 58 are at an angle ⁇ 1 of 72 ° to each other.
  • the web width s 1 (for example, 50 microns) at the top of the webs 58 is correspondingly small to minimize the flow losses.
  • the five exit cross sections 62 result in a total area of 6.4 mm 2 and correspond almost to the area of 7 mm 2 at the inner diameter D 3 , which leads to a minimal difference in area to the inner diameter of the anchor pin 12 a.
  • the five inlet cross sections 60 result in a total area of 11 mm 2 .
  • the Figs. 7A to 8B show a segment of the Umlenkkappe 46, which in the Fig. 5A is indicated by the angle ⁇ 1 .
  • the Figs. 7A and 7B thus show a cross section through a web 58 along the line AA in Fig. 5A ,
  • the Figs. 9A and 9B show a tool for a MIM technique. Due to the selected shape of the deflection cap 46, the deflection cap 46 can be demoulded with only two axially movable tool halves 60a, 60b. The lower mold half 60a, as indicated by the arrows, downwardly and the upper mold half 60b upwardly demolded.
  • the Fig. 8B shows the tool parting surfaces 62 formed by the surfaces 64 of the lower tool half 60a and by the surfaces 66 of the upper tool half 60b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (8)

  1. Soupape de régulation de la pression (10), comprenant :
    un boîtier (20) avec une ouverture d'entrée (16) et une ouverture d'écoulement (18) ;
    une tige de soupape (12) guidée dans le boîtier (20) ;
    un élément de soupape (36) à une extrémité de la tige de soupape (12), qui est réalisée de manière à fermer un siège de soupape (14) lors du déplacement de la tige de soupape (12) de telle sorte qu'un écoulement de fluide (50) entre l'ouverture d'entrée (16) et l'ouverture d'écoulement (18) soit interrompu ;
    caractérisée en ce que
    la tige de soupape (12) est divisée en une tige d'ancrage (12a) et un pointeau de soupape (12b), la tige d'ancrage (12a) présentant un canal creux (47) et le pointeau de soupape (12b) présentant au moins un canal latéral (48) de telle sorte que lorsque la soupape de régulation de pression (10) est ouverte, l'écoulement de fluide (50) soit guidé depuis l'ouverture d'entrée (16) à travers le canal latéral (48) dans le canal creux (47) et de là dans l'ouverture d'écoulement (18), la soupape de régulation de pression (10) comprenant un capuchon de déviation (46) pour l'écoulement de fluide (50), qui est disposé entre la tige d'ancrage (12a) et le pointeau de soupape (12b).
  2. Soupape de régulation de pression (10) selon la revendication 1,
    dans laquelle le pointeau de soupape (12b) présente un plus grand diamètre que la tige d'ancrage (12a) ; et/ou
    dans laquelle le pointeau de soupape (12b) présente au moins trois canaux latéraux axiaux (48).
  3. Soupape de régulation de pression (10) selon la revendication 1 ou 2,
    dans laquelle la tige d'ancrage (12a) est guidée dans une première partie de boîtier (20a) et le pointeau de soupape (12b) est guidé dans une deuxième partie de boîtier (20b), lesquelles sont enfichées l'une dans l'autre.
  4. Soupape de régulation de pression (10) selon l'une quelconque des revendications précédentes,
    dans laquelle le capuchon de déviation (46) est fixé à la tige d'ancrage (12a) et est supporté sur le pointeau de soupape (12b).
  5. Soupape de régulation de pression (10) selon la revendication 4,
    dans laquelle le capuchon de déviation (46) est fixé à la tige d'ancrage (12a) au moyen d'une connexion à rainure (52).
  6. Soupape de régulation de pression (10) selon l'une quelconque des revendications précédentes, dans laquelle le capuchon de déviation (46) présente une paroi extérieure annulaire (54) dont l'intérieur est divisé par des nervures radiales (56) en au moins deux ouvertures de passage (58).
  7. Soupape de régulation de pression (10) selon la revendication 6,
    dans laquelle les ouvertures de passage (58) s'étendent obliquement par rapport à une direction axiale (A).
  8. Soupape de régulation de pression (10) selon la revendication 6 ou 7,
    dans laquelle les nervures (56) présentent une section transversale en forme de goutte dans la direction axiale (A).
EP14720618.9A 2013-06-24 2014-04-30 Soupape de régulation de pression comprenant une chicane Not-in-force EP3014110B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013211937.2A DE102013211937A1 (de) 2013-06-24 2013-06-24 Druckregelventil mit Umlenkkappe
PCT/EP2014/058915 WO2014206605A1 (fr) 2013-06-24 2014-04-30 Soupape de regulation de pression comprenant une chicane

Publications (2)

Publication Number Publication Date
EP3014110A1 EP3014110A1 (fr) 2016-05-04
EP3014110B1 true EP3014110B1 (fr) 2017-06-14

Family

ID=50628830

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14720618.9A Not-in-force EP3014110B1 (fr) 2013-06-24 2014-04-30 Soupape de régulation de pression comprenant une chicane

Country Status (3)

Country Link
EP (1) EP3014110B1 (fr)
DE (1) DE102013211937A1 (fr)
WO (1) WO2014206605A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10312175A1 (de) * 2003-03-19 2004-10-14 Robert Bosch Gmbh Druckbegrenzungsventil
US20080022974A1 (en) * 2006-07-28 2008-01-31 Caterpillar Inc. Multi-stage relief valve having different opening pressures
DE102010043097A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Druckregelventil
DE102010043092A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Druckregelventil
FR2973076A1 (fr) * 2011-03-25 2012-09-28 Bosch Gmbh Robert Regulateur de pression, dispositif d'injection diesel comportant un tel regulateur, moteur diesel comportant un tel dispositif d'injection et vehicule comportant un tel moteur
DE102011017765A1 (de) * 2011-04-29 2012-10-31 Robert Bosch Gmbh Druckbegrenzungsventil

Also Published As

Publication number Publication date
DE102013211937A1 (de) 2014-12-24
EP3014110A1 (fr) 2016-05-04
WO2014206605A1 (fr) 2014-12-31

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