WO2019025063A1 - Soupape à actionnement électromagnétique et pompe à carburant haute pression - Google Patents

Soupape à actionnement électromagnétique et pompe à carburant haute pression Download PDF

Info

Publication number
WO2019025063A1
WO2019025063A1 PCT/EP2018/065348 EP2018065348W WO2019025063A1 WO 2019025063 A1 WO2019025063 A1 WO 2019025063A1 EP 2018065348 W EP2018065348 W EP 2018065348W WO 2019025063 A1 WO2019025063 A1 WO 2019025063A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
armature
outlet opening
face
fuel pump
Prior art date
Application number
PCT/EP2018/065348
Other languages
German (de)
English (en)
Inventor
Gabriel CICHON
Stefan Kolb
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 WO2019025063A1 publication Critical patent/WO2019025063A1/fr

Links

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
    • F02M59/366—Valves being actuated electrically
    • F02M59/368—Pump inlet valves being closed 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/029—Electromagnetically actuated valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0686—Braking, pressure equilibration, shock absorbing
    • F16K31/0693—Pressure equilibration of the armature

Definitions

  • the invention relates to an electromagnetically operable valve, in particular a suction valve for a high-pressure fuel pump, with the features of
  • the preamble of claim 1 Furthermore, the invention relates to a high-pressure fuel pump with such a valve.
  • a fuel high-pressure pump of the aforementioned type is used to promote fuel to high pressure.
  • fuel is in one
  • the strong compression spring After completion of the energization of the solenoid, the strong compression spring returns the armature to its original position, the armature again comes into contact with the valve stem and the suction valve opens again. As the armature moves, one volume is increased on one side of the armature and one volume on the other side of the armature. Thus, this does not affect the movement of the armature, this usually has at least one balance hole to create a pressure equalization.
  • the movement of the armature may be affected by magnetic forces that cause the armature to move in a preferred direction. This may be due to eddy currents. These are undirected currents that lead to the formation of magnetic fields that do not act in the direction of movement of the armature. The armature is thus deflected radially, which has an increased friction and thus increased wear in the field of leadership of the anchor result.
  • the object of the present invention is to minimize the wear in the region of the armature guide of an electromagnetically actuated valve, in particular a suction valve. In this way, the life of the valve should be increased.
  • the proposed electromagnetically operable valve in particular suction valve, comprises an annular solenoid and a liftable between two end stops armature.
  • the armature is penetrated by at least one compensating bore, which defines a first outlet opening in a first end face of the armature and a second outlet opening in a second end face of the armature.
  • Balancing hole at least partially oblique, rising and / or coiled, so that in a projection of the second end face on the first End face, the second outlet opening in the projection plane offset from the first outlet opening is arranged.
  • the at least one compensating bore of the armature has, at least in sections, a course deviating from an axial course.
  • the compensation hole is thus not or not continuously flowed through axially during operation of the valve. This has the consequence that flow forces act on the anchor, by means of which an undesirable deflection of the armature can be counteracted.
  • the armature is thus less stressed on wear, which increases the life of the armature or the valve.
  • the course of the at least one compensation bore is preferably selected such that the armature is set into a rotational movement via the flow forces. This is especially the case when the course of the
  • Compensation bore is at least partially rising and / or coiled.
  • the compensation bore is preferably at least partially tilted with respect to a plane which runs parallel to the longitudinal axis of the armature.
  • an oblique hole course leads to a rotational movement of the armature.
  • the outlet openings of the compensation bore are each arranged eccentrically with respect to the respective end face.
  • the radial distance of the outlet openings to the center of the respective end face promotes flow forces that set the armature in a rotation.
  • the second outlet opening is preferably arranged in the projection at an angular distance ⁇ from the first outlet opening.
  • the distance between the two outlet openings to the center of the respective end face can be chosen to be the same size or different sizes.
  • the second outlet opening is additionally arranged in the projection at a radial distance a from the first outlet opening.
  • the armature is penetrated by a plurality of compensation bores, which are arranged in the plan view of the armature at the same angular distance ß to each other.
  • a plurality of compensation bores which are arranged in the plan view of the armature at the same angular distance ß to each other. For example, two, three or four
  • the angular distance ß in this case is 180 °, 120 ° or 90 °. Due to the plurality of equiangularly spaced equalization holes ensures that the flow forces in the circumferential direction uniformly act on the anchor, so that any deflection of the armature is not enhanced by the flow forces. At the same time can be offset in this way, the anchor in a uniform rotational movement.
  • the armature has a central recess. Through the central recess, the mass of the armature is further reduced, which has a favorable effect on the dynamics of the armature movement. Furthermore, the recess of the connection of the armature can serve with an anchor bolt, so that preferably an anchor bolt is received in the central recess. Furthermore preferably protrudes beyond
  • Anchor bolt the anchor to form a stop surface for contacting a valve stem of the valve.
  • the stop surface of the anchor bolt is therefore claimed during operation of the valve also to wear. If the anchor rotates, the contact points of the anchor bolt also change with the valve lifter, so that the wear is reduced.
  • the anchor is stepped.
  • the stepped version of the anchor itself can form a stop surface for contacting a valve stem, which in the case of
  • the end faces of the armature are circular.
  • the armature is at least partially cylindrical.
  • the outer peripheral surface forms a cooperating with the armature guide guide surface.
  • the diameters of the circular end faces are the same size.
  • Fuel injection system proposed with a valve according to the invention.
  • the valve is a suction valve, which is integrated in a housing part of the high-pressure fuel pump.
  • the valve is special
  • FIG. 1 shows a schematic longitudinal section through an inventive valve in the form of a suction valve, which is integrated in a high-pressure fuel pump,
  • FIG. 2 an enlarged detail of FIG. 1 in the region of the armature, FIG.
  • FIG. 3 shows a schematic cross section through the armature of the valve of FIG. 1,
  • FIG. 4 shows a schematic longitudinal section through an armature of a valve according to a second preferred embodiment of the invention
  • FIG. 5 shows a schematic longitudinal section through an armature of a valve according to a third preferred embodiment of the invention.
  • the valve 1 is for this purpose in a
  • Housing part 20 of the high-pressure fuel pump 2 is integrated, in such a way that a valve stem 17 of the valve 1 opens into the element space 21.
  • the reaching over the valve 1 in the element space 21 fuel is on the Stroke movement of a pump piston 22 compressed and then fed via an outlet valve 24 a high-pressure accumulator (not shown).
  • valve stem 17 of the valve 1 is acted upon in the closing direction by the spring force of a valve spring 18, on the one hand on the valve stem 17, on the other hand
  • Housing part 20 is supported.
  • the spring force of a spring 16 on the valve stem 17 which is supported on the one hand to an armature 6, on the other hand to a pole core 15, which limits together with the armature 6 a working air gap.
  • the spring force of the spring 16 is greater than that of the valve spring 18, so that the spring 16 keeps the valve 1 open as long as the armature 6 and the
  • the element space 21 is filled via an annular low pressure chamber 19 with fuel.
  • the fuel is the
  • Low-pressure chamber 19 is supplied via an inlet bore 23 formed in the housing part 20.
  • the armature 6 moves between two end stops 4, 5 back and forth.
  • the end stop 4 is presently formed by the pole core 15.
  • the end stop 5 is formed by a valve body 14 or a stop disc supported thereon, the valve body 14 guiding the armature 6.
  • the valve body 14 and the armature 6 are therefore claimed during operation of the valve 1 for wear.
  • the armature 6 is penetrated by a plurality of compensating holes 7, each extending from one end face 9 to the other end face 1 of the armature 6 and via discharge openings 8, 10 open into the pressure chambers formed on both sides of the armature 6 , In operation of the Valve 1 is thus flows through the armature 6 of fuel, whereby a pressure compensation can be effected.
  • the four compensating holes 7 are each arranged at the same angular distance ß to each other, so that the angular distance ß in the present case is 90 °.
  • the compensation bores 7 are not axially guided by the armature 6, but have a rising or coiled course. That is, the compensating holes 7 are made warped in the circumferential direction. If the end face 9 is projected onto the end face 11, as indicated in FIG. 3, then the two outlet openings 8, 10 are one
  • Angular distance ⁇ in this case is 45 °.
  • the angular distance ⁇ can also be chosen larger or smaller. The chosen course of the
  • Compensation holes 7 has the consequence that act on the armature 6 in the operation of the valve 1 flow forces that put the armature 6 in a rotational movement (see arrows).
  • the rotational movement of the armature 6 ensures a uniform wear stress in the region of its outer peripheral side guide surface, so that the life of the armature 6 and thus of the valve 7 increases.
  • FIG. 4 A further preferred embodiment is shown in FIG. 4.
  • the outlet openings 8, 10 of the compensation holes 7 in the projection at a radial distance a to each other. At the same time they run obliquely with respect to a plane which is arranged parallel to a longitudinal axis A of the armature 6 and in the present case corresponds to the plane of the drawing.
  • the compensating bores 7 can also have only an oblique, rising and / or coiled course in sections. This means that there are a large number of possible variations with regard to the specific embodiment of the armature 6.

Landscapes

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

Abstract

L'invention concerne une soupape (1) à actionnement électromagnétique, en particulier une soupape d'aspiration pour une pompe à carburant haute pression (2). La soupape comporte une bobine magnétique (3) annulaire et une armature (6) pouvant effectuer un mouvement de va-et-vient entre deux butées de fin de course (4, 5), l'armature (6) étant traversée par au moins un trou de compensation (7) qui définit un premier orifice de sortie (8) dans une première face frontale (9) de l'armature (6) et un deuxième orifice de sortie (10) dans une deuxième face frontale (11) de l'armature (6). Selon l'invention, le trou de compensation (7) s'étend au moins en partie de manière inclinée, ascendante et/ou hélicoïdale, de sorte que lors d'une projection de la deuxième face frontale (11) sur la première face frontale (9), le deuxième orifice de sortie (10) est décalé du premier orifice de sortie (8) dans le plan de projection. En outre, l'invention concerne une pompe à carburant haute pression (2) pourvue de ladite soupape (1).
PCT/EP2018/065348 2017-08-02 2018-06-11 Soupape à actionnement électromagnétique et pompe à carburant haute pression WO2019025063A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017213417.8 2017-08-02
DE102017213417.8A DE102017213417A1 (de) 2017-08-02 2017-08-02 Elektromagnetisch betätigbares Ventil und Kraftstoff-Hochdruckpumpe

Publications (1)

Publication Number Publication Date
WO2019025063A1 true WO2019025063A1 (fr) 2019-02-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/065348 WO2019025063A1 (fr) 2017-08-02 2018-06-11 Soupape à actionnement électromagnétique et pompe à carburant haute pression

Country Status (2)

Country Link
DE (1) DE102017213417A1 (fr)
WO (1) WO2019025063A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040261771A1 (en) * 2001-11-27 2004-12-30 Takeshi Ichinose Fluid flow rate control valve, anchor for mover and fuel injection system
DE102006050810A1 (de) * 2006-10-27 2008-04-30 Robert Bosch Gmbh Kraftstoffinjektor
WO2014079646A1 (fr) * 2012-11-26 2014-05-30 Bayerische Motoren Werke Aktiengesellschaft Dispositif d'injection pour moteur à combustion interne

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040261771A1 (en) * 2001-11-27 2004-12-30 Takeshi Ichinose Fluid flow rate control valve, anchor for mover and fuel injection system
DE102006050810A1 (de) * 2006-10-27 2008-04-30 Robert Bosch Gmbh Kraftstoffinjektor
WO2014079646A1 (fr) * 2012-11-26 2014-05-30 Bayerische Motoren Werke Aktiengesellschaft Dispositif d'injection pour moteur à combustion interne

Also Published As

Publication number Publication date
DE102017213417A1 (de) 2019-02-07

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