EP3014108B1 - Soupape de régulation de pression à canal latéral sur la tige de soupape - Google Patents

Soupape de régulation de pression à canal latéral sur la tige de soupape Download PDF

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Publication number
EP3014108B1
EP3014108B1 EP14729674.3A EP14729674A EP3014108B1 EP 3014108 B1 EP3014108 B1 EP 3014108B1 EP 14729674 A EP14729674 A EP 14729674A EP 3014108 B1 EP3014108 B1 EP 3014108B1
Authority
EP
European Patent Office
Prior art keywords
valve
actuating element
pressure control
pin
control 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.)
Not-in-force
Application number
EP14729674.3A
Other languages
German (de)
English (en)
Other versions
EP3014108A1 (fr
Inventor
Dietmar Uhlmann
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 EP3014108A1 publication Critical patent/EP3014108A1/fr
Application granted granted Critical
Publication of EP3014108B1 publication Critical patent/EP3014108B1/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
    • F02M63/0012—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
    • 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
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
    • 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

Definitions

  • the invention relates to a pressure regulating valve, which is used for example in a fuel supply system of a vehicle, as well as a method for producing the pressure regulating valve.
  • 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 an electromagnet that can move a valve pin in a valve pin bore and that holds a sealing element, such as a valve ball, in a valve seat by the magnetic force to close the pressure regulating valve ,
  • valve pin In known pressure control valves, the valve pin is held in an axial guide which is embodied in a separate component from the valve seat, whereby an axial offset can be present between the guide of the valve pin and the valve seat.
  • the interface between the valve pin and the sealing element is therefore designed so that the lateral movement of the sealing element in favor of quiet operation is prevented (for example by means of a deep dome, in which a valve ball is partially recessed).
  • This radial bonding of the sealing element to the valve pin in combination with the above-mentioned axial offset between the guide of the valve pin and the valve seat, may result in the valve not being sealed or having a closing delay or hysteresis.
  • the dome is stamped on the valve pin in the assembled state to compensate for the axial offset. Also tolerances are limited in terms of coaxiality for a valve body, a valve housing and the valve pin. These measures are usually associated with increased costs and / or deteriorated output.
  • One aspect of the invention relates to a pressure regulating 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 having an inlet opening and an outlet opening; a valve seat in the housing at the end of the inlet opening; a guided in the housing valve pin with an actuating element or a valve needle for closing the valve seat and a sealing element at one end of the actuating element, which is adapted to be discontinued upon movement of the valve pin in the valve seat, so that a fluid flow between the inlet opening and the Outflow opening is interrupted.
  • the actuating element is guided in a guide in the housing and has at least one side channel, which is adapted to guide fluid from the inlet opening through the guide in the direction of the outflow opening.
  • the actuating element can be guided in the same component (a valve body) in which the valve seat is also contained.
  • a better axial alignment generally leads to a centric force introduction to the actuating element and / or the sealing element and thus to a reduction of wear and hysteresis.
  • the tightness of the valve can be improved.
  • expensive, non-robust method such as the internal embossing of the actuating element on the sealing element, can be omitted in the manufacture of the pressure regulating valve.
  • the valve seat and an axial guide of the actuating element can be provided for example by a one-piece valve body.
  • a greatly improved coaxiality between the guide of the actuating element and the valve seat can then be achieved by machining the guide and valve seat with a single tool (for example a step tool).
  • the valve body may be a part of the housing in which the sealing element (for example, a ball) and the valve seat (for example, a conical surface) are provided.
  • a guide for the actuator or more generally a guide for the valve pin may be an axial bore / opening in the valve body or housing. This bore or opening may have the same cross-sectional area as the actuating element.
  • the actuating element has at least three axial side channels.
  • the side channels or longitudinal grooves can be arranged symmetrically to a central axis of the actuating element.
  • the actuating element at least partially has a cylindrical basic shape and at least a side channel is formed by a recess / groove in the axial direction.
  • the one or more side channels may be, for example, longitudinal grooves. In this way, the outflow of the fluid to the low-pressure region can take place axially past the actuating element.
  • the at least one side channel may have a substantially uniform cross section, for example with a cylindrical surface.
  • the at least one side channel can widen radially inwards in the direction of a point with the sealing element.
  • the actuating element tapers at one end with the sealing element to a tip, on which the sealing element is provided.
  • the sealing element comprises a valve ball which is separate from the actuating element. But it is also possible that the sealing element is part of the actuating element or is made integral with this / one piece.
  • the valve ball is discontinued in a dome at a tip of the actuating element.
  • a dome can be understood a surface that is part of a spherical surface.
  • the valve pin comprises an anchor pin which is supported on the actuating element.
  • the valve pin may comprise several parts.
  • the pressure regulating valve may comprise an actuator for moving the anchor pin, which may be, for example, a coil or an electromagnet.
  • the separate from the anchor pin actuator is according to the invention (for example, via an intermediate element or a cap on the anchor pin) supported on the anchor pin and moved by this with.
  • the anchor pin is at least partially hollow and provides a connection for the fluid to the discharge opening.
  • the anchor pin can be designed as a tube.
  • the housing comprises a further housing part separated from the valve body with a guide for the anchor pin.
  • the housing can thus be constructed in several parts. In this way, the two housing parts can be made of different materials.
  • the guide for the actuator may be integrated in the valve body, which is normally made of a hard material to avoid wear of the valve seat.
  • the further housing part may be made of a softer material.
  • the actuating element 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 actuating element at one end, which is opposite to the sealing element, a support surface in the form of a (spherical) dome.
  • a center of the dome may be located within the sealing element.
  • the sealing element may be a valve ball and the radius of the dome for the support surface may be selected so that the center of the dome coincides with the center of the valve ball.
  • the dome for receiving the valve ball at the tip of the actuating element may have a radius, so that the center of the dome for receiving the valve ball coincides with the center of the dome of the support surface and / or the center of the valve ball.
  • Another aspect relates to a method of assembling a pressure control valve, comprising the steps of providing a housing for the pressure control valve with a guide for an actuator a valve pin and a valve seat for depositing a valve ball; Providing the actuator with a dome at one end for receiving the valve ball, the dome being formed prior to assembly of the housing and the actuator in the actuator; and assembling the housing, the actuator, and the valve ball by positioning the valve ball on the valve seat and inserting the actuator into the guide.
  • the method further includes the step of: casting the actuator with the dome.
  • the dome is thus not coined during assembly, but is already present after the casting of the actuator.
  • the actuator may have at least one side channel formed during casting.
  • the actuating element can be shaped, for example, by means of MIM (metal injection molding).
  • the 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 an anchor pin 12a and an actuating element 12b, which are arranged one behind the other in a multi-part housing 20, are guided by the latter in an axial direction A and are axially aligned in the axial direction A.
  • the anchor pin 12a has a smaller diameter than the actuator 12b.
  • the anchor pin 12a is guided in a first housing part 20a and the actuating element 12b in a second housing part 20b or valve body 20b, the valve body 20a being connected to the first housing part 20a via a screw connection 22. Between the housing part 20a and the valve body 20b, a sealing ring 23 is arranged.
  • first housing part 20a In the first housing part 20a is an axial guide opening 24 for guiding the anchor pin 12a.
  • second housing part 20b In the second housing part 20b is an axial guide opening 26 for guiding the actuating element 12b.
  • the two guide openings each have the same inner diameter as the corresponding outer diameter of the anchor pin 12a and the actuating element 12b.
  • an actuator 28 in the form of a coil surrounding the anchor pin 12a coil 28 is arranged, which generates a magnetic field when energized, which acts on an anchor plate 30 which is attached to one end of the anchor pin 12a.
  • the anchor plate 30 is disposed in an opening 32 in the housing 20, which is formed between a valve cover 34 and the housing part 20 a.
  • the valve cover 34 is placed on the housing part 20a. Between the housing part 20 a and the valve cover 34, a further sealing ring 36 is arranged.
  • the valve cover 34 provides the axial outflow opening 18, which is opposite to the axial inlet opening 16. Furthermore, the valve cover 34 has an electrical interface 38, in which electrical contacts, such as connector pins, for energizing the coil 28 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 40 of the actuating element 12b, on which a valve ball 42 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 44 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 46 of a common rail system, for example via a screw connection 48.
  • a shim 50 is arranged, with which the distance between the valve tip 40 and the valve seat 14 can be adjusted in the axial direction.
  • an anchor pin cap 52 is attached, which is discontinued at one end 54 of the actuating element 12b.
  • the anchor pin 12a is hollow or tubular and has a hollow channel 58 in its interior.
  • the actuator 12b has lateral, axial channels 60 and grooves 60, respectively.
  • the anchor pin cap 46 is designed to redirect a flow of fluid from the side channels 48 into the hollow channel 47 of the anchor pin 12 a and has a throughflow opening 62 for this purpose.
  • fluid can now flow in a substantially axial fluid flow out of the inlet opening 16 past the valve ball 42 through the side channels 60, is then deflected by the anchor pin cap 46 into the hollow channel 58 of the anchor pin 12a, in the direction of the outlet opening 18 to stream.
  • the Fig. 2 shows a further embodiment of a pressure regulating valve 10, wherein the actuating element 12b has an integrally formed sealing element 42 '. Since the guide opening 26 and the valve seat 14 are arranged in the same component 20b, this allows a much more precise position of these two components 12b, 14 to each other. In this way, the sealing element 42 'can already be exactly centered during the manufacture of the actuating element 12b.
  • a spring 64 is arranged in the guide opening 26 between the valve seat 14 and the actuating element 12b, which can push the actuating element 12b in the direction of the anchor pin 12.
  • the anchor pin plate 52 'of Fig. 2 has no openings, but closes the end of the anchor pin 12a. Instead, the anchor pin 12a has lateral Openings 66, through which fluid which has flowed past the actuating element 12b, can flow into the cavity 58 in the anchor pin 12a.
  • the outer diameter of the anchor pin 12a is greater than the outer diameter of the actuating element.
  • FIGS. 3A and 3B show components of the valve pin 12 in two perspective views.
  • the actuator 12b has three side channels 60 which extend in the axial direction A.
  • Each of the side channels 60 has a circular segment-shaped cross section.
  • the cross section of the side channels 60 widens in such a way that they touch the valve ball 42.
  • the Umlenkkappe 52 is inserted by means of a groove connection 68 on the anchor pin 12a.
  • the Umlenkkappe 52 and the anchor pin 12a have the same outer diameter, which is smaller than the outer diameter of the valve needle 12b.
  • the Figs. 4A to 4D show the actuator 12b from different views, as it is also in the Fig. 1 and 3A or 3B is shown.
  • the actuating element 12b from the Fig. 2 can except for the integral sealing element 42 'as well as in the Figs. 4A to 4D shown actuator 12 b to be constructed.
  • the actuating element 12b has a cylindrical base body, which merges at one end into a tip 40 with a cap 70, which serves to receive a valve ball 42. At an opposite end, it has a rounded support surface 54 for the deflection cap 52, 52 '.
  • the actuating element 12b has three side channels 60, which extend in the axial direction A.
  • Each of the side channels 60 has a circular segment-shaped cross section. In the area of the top 40 of the Actuator 12 b, the cross-section of the side channels 60 expands so that they touch the dome 70.
  • the cap 70 may be prefabricated in the actuator 12b. A complex embossing process in the assembled state is no longer necessary. Since the production of the dome 70 does not necessarily have to be made by embossing, an increase in the dome depth is possible. A lateral oscillation movement of the valve ball 42 due to the instability of the flow of the fluid can thus be avoided more effectively. Consequently, the robustness against the generation of disturbing noises is then greater.
  • Another advantage is the ability to interpret the hardness of the actuator 12b regardless of the depth of the cap 70.
  • the actuator 12b can be designed harder and thus be more robust against transport and handling damage.
  • the support surface 54 is also a dome with a spherical surface of radius R.
  • the radius R is designed so that the center 72 of the theoretical sphere is identical to the center of the dome 70 and the valve ball 42, respectively. This ensures that the introduction of force from the actuator 22 to the actuator 12b and the actuator 12b on the valve ball 42 is always centric, even if the actuator 12b tilts slightly within the game of the guide 26.
  • valve ball 42 When opening and closing the valve 10, the valve ball 42 is taken over the dome 70 from the actuator 12b. Especially when closing is ensured thanks to the good coaxiality between the guide 26 and the valve seat 14 that the sealing element 42 hits the valve seat 14 centrally. Thus, it is avoided that the valve ball 42 must slide with significant friction losses along one side of the valve seat 14 and that the actuator 12b canted due to the lateral reaction forces. Consequently, the robustness increases over a closing hysteresis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)
  • Magnetically Actuated Valves (AREA)

Claims (7)

  1. Soupape de régulation de la pression (10), comprenant :
    un boîtier (20) avec une ouverture d'entrée (16) et une ouverture de sortie (18) ;
    un siège de soupape (14) dans le boîtier (20) à l'extrémité de l'ouverture d'entrée (16) ;
    une tige de soupape (12) guidée dans le boîtier (20) avec un élément d'actionnement (12b) pour fermer le siège de soupape (14) ;
    un élément d'étanchéité (42, 42') à une extrémité de l'élément d'actionnement (12b), qui est réalisé de manière à être déposé dans le siège de soupape (14) lors du déplacement de la tige de soupape (12) de telle sorte qu'un écoulement de fluide entre l'ouverture d'entrée (16) et l'ouverture de sortie (18) soit interrompu ;
    l'élément d'actionnement (12b) étant guidé dans un guide (26) dans le boîtier (20) et présentant au moins un canal latéral (60) qui est réalisé de manière à conduire du liquide depuis l'ouverture d'entrée (16) à travers le guide (26) dans la direction de l'ouverture de sortie (18),
    caractérisée en ce que
    la tige de soupape (12) comprend une tige d'ancrage (12a) qui est supportée sur l'élément d'actionnement (12b).
  2. Soupape de régulation de la pression (10) selon la revendication 1,
    dans laquelle l'élément d'actionnement (12b) présente au moins en partie une forme de base cylindrique et l'au moins un canal latéral (60) est formé par un évidement dans la direction axiale (A).
  3. Soupape de régulation de la pression (10) selon la revendication 1 ou 2,
    dans laquelle l'élément d'actionnement (12b), à une extrémité comprenant l'élément d'étanchéité (42, 42'), se rétrécit coniquement jusqu'à une pointe (40) au niveau de laquelle est prévu l'élément d'étanchéité.
  4. Soupape de régulation de la pression (10) selon l'une quelconque des revendications précédentes,
    dans lequel l'élément d'étanchéité (42) comprend une bille de soupape séparée de l'élément d'actionnement (12b).
  5. Soupape de régulation de la pression (10) selon la revendication 4,
    dans laquelle la bille de soupape (42) est déposée dans une calotte (70) au niveau d'une pointe (40) de l'élément d'actionnement (12b).
  6. Soupape de régulation de la pression selon l'une quelconque des revendications précédentes, dans laquelle l'élément d'actionnement (12b) présente un plus grand diamètre que la tige d'ancrage (12a).
  7. Soupape de régulation de la pression (10) selon l'une quelconque des revendications précédentes, dans laquelle l'élément d'actionnement, à une extrémité opposée à l'élément d'étanchéité (42, 42'), présente une surface de support (54) en forme de calotte ;
    un centre (72) de la calotte étant situé à l'intérieur de l'élément d'étanchéité (42, 42').
EP14729674.3A 2013-06-24 2014-06-13 Soupape de régulation de pression à canal latéral sur la tige de soupape Not-in-force EP3014108B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102013211921 2013-06-24
DE102013215085.7A DE102013215085A1 (de) 2013-06-24 2013-08-01 Druckregelventil mit Seitenkanal am Ventilstift
PCT/EP2014/062330 WO2014206764A1 (fr) 2013-06-24 2014-06-13 Soupape de régulation de pression à canal latéral sur la tige de soupape

Publications (2)

Publication Number Publication Date
EP3014108A1 EP3014108A1 (fr) 2016-05-04
EP3014108B1 true EP3014108B1 (fr) 2017-08-09

Family

ID=52010482

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14729674.3A Not-in-force EP3014108B1 (fr) 2013-06-24 2014-06-13 Soupape de régulation de pression à canal latéral sur la tige de soupape

Country Status (3)

Country Link
EP (1) EP3014108B1 (fr)
DE (1) DE102013215085A1 (fr)
WO (1) WO2014206764A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2999658A1 (fr) * 2012-12-18 2014-06-20 Delphi Technologies Holding Vanne haute pression
DE102013220913A1 (de) 2013-10-15 2015-04-16 Continental Automotive Gmbh Ventil
CN110953394B (zh) * 2019-10-14 2022-07-29 中国北方发动机研究所(天津) 一种燃烧室喷嘴电磁阀

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10129822C2 (de) * 2001-06-13 2003-04-24 Mtu Friederichshafen Gmbh Druckbegrenzungsventil für Kraftstoff-Einspritzeinrichtungen
DE10312175A1 (de) * 2003-03-19 2004-10-14 Robert Bosch Gmbh Druckbegrenzungsventil
DE102005033636A1 (de) * 2004-10-06 2006-04-20 Robert Bosch Gmbh Kraftstoffsystem für eine Brennkraftmaschine
US20060196476A1 (en) * 2005-02-28 2006-09-07 Caterpillar Inc. Pressure relief valve
US20080022974A1 (en) * 2006-07-28 2008-01-31 Caterpillar Inc. Multi-stage relief valve having different opening pressures
DE102011017765A1 (de) * 2011-04-29 2012-10-31 Robert Bosch Gmbh Druckbegrenzungsventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2014206764A1 (fr) 2014-12-31
DE102013215085A1 (de) 2014-12-24
EP3014108A1 (fr) 2016-05-04

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