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WO2019233662A1 - Soupape d'aspiration à commande électromagnétique et pompe à carburant haute pression - Google Patents

Soupape d'aspiration à commande électromagnétique et pompe à carburant haute pression Download PDF

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Publication number
WO2019233662A1
WO2019233662A1 PCT/EP2019/059255 EP2019059255W WO2019233662A1 WO 2019233662 A1 WO2019233662 A1 WO 2019233662A1 EP 2019059255 W EP2019059255 W EP 2019059255W WO 2019233662 A1 WO2019233662 A1 WO 2019233662A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
armature
air gap
working air
mammal
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.)
Ceased
Application number
PCT/EP2019/059255
Other languages
German (de)
English (en)
Inventor
Gabriel CICHON
Steffen Holm
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 WO2019233662A1 publication Critical patent/WO2019233662A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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

Definitions

  • the invention relates to an electromagnetically actuated mammary 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 an electromagnetically actuated mammalian valve.
  • an electromagnetically operable inlet valve for a high-pressure pump in particular a fuel injection system, emerges by way of example, which comprises a valve member movable between an open position and a closed position and an electromagnetic actuator for actuating the valve member.
  • the electromagnetic actuator has an armature acting at least indirectly on the valve member and a magnetic coil for acting on the armature.
  • the magnet armature is guided in a liftable manner via its outer casing in a recess of a carrier element. Since over the service life of the intake valve of the
  • Magnetic anchor performs many strokes that lead to wear on the outer jacket of the armature and / or on the support member, at least one of these surfaces has been smoothed and / or work hardened in a post-processing step. In this way, the robustness of the inlet valve increases. The smoothing also counteracts deposits on the guide surfaces, which could affect the lifting movement of the armature.
  • the present invention has for its object to provide an electromagnetically actuated mammalian valve for a high-pressure fuel pump, the highly dynamic armature movements and thus short, reproducible Valve switching times enabled. In this way, valve switching time fluctuations should be counteracted.
  • the proposed for a high-pressure fuel pump electromagnetically actuated mammalian valve comprises an annular solenoid for acting on a liftable armature, which together with a pole core a
  • the armature and / or the pole core has or have a stop surface facing the working air gap, which stop surface is reduced by at least one recessed area relative to the respective cross-sectional area.
  • the recessed area connects the working air gap with an annular space surrounding the armature.
  • the pole core forms the stroke stop for the anchor.
  • the energization of the solenoid is terminated.
  • the armature loosens from the pole core or from the stroke stop and pulls up the working air gap again. Usually, this creates a suppression between the pole core and the armature, which leads to a hydraulic bonding of the armature to the pole core or the stroke stop.
  • the mammal valve of the working air gap is connected to an annular space surrounding the armature, the working air gap can fill faster, so that hydraulic adhesive effects is counteracted.
  • the anchor is able to disengage faster from the pole core or stroke stop, resulting in short, reproducible valve switching times.
  • the rapid refilling of the working air gap when resetting the armature also has the advantage that the risk of cavitation is reduced.
  • At least one recessed region of a working air gap defining surface of the armature and / or the pole core is formed by a recess or depression. This must be such and / or with at least one other
  • the recess or recess may be, for example, a groove communicating with the annulus. This is the case, for example, if the groove extends radially, so that it opens into the annular space.
  • the groove can also run in a circular ring and be connected via a further recessed area with the annulus.
  • At least one recessed region is formed by a defined structure.
  • a “defined structure” is understood to mean depressions which are distributed regularly over the respective surface.
  • the structure may be formed of intersecting grooves.
  • the recesses of the structure are interconnected so that a hydraulic connection of the structure to the annular space surrounding the armature also via a few opening into the annulus depressions or
  • At least one recessed region is formed by a working air gap defining surface which is conical or spherically shaped.
  • a reduced annular abutment surface is provided, which is preferably arranged radially inwardly with respect to the recessed region. This ensures that the recessed area attaches to the anchor
  • the armature in the axial direction is penetrated by at least one flow opening.
  • the flow opening allows for a stroke movement of the armature pressure equalization, since it connects the working air gap with a pressure chamber on the other side of the armature. Consequently, the flow-through opening promotes a quick return of the anchor.
  • a plurality of decentralized flow opening allows for a stroke movement of the armature pressure equalization, since it connects the working air gap with a pressure chamber on the other side of the armature. Consequently, the flow-through opening promotes a quick return of the anchor.
  • Through openings are formed at the same angular distance from each other in the armature, so that a large total flow area is created. At the same time, the mass of the armature is reduced via the at least one through-flow opening, so that its dynamics continue to increase.
  • the armature is coupled to a liftable valve member of the mammal valve and acted upon in the direction of the valve member by the spring force of a spring.
  • the spring force of the spring can be used to return the anchor. This is preferably designed so strong that it exerts an opening force on the valve member via the armature.
  • the armature is guided by a valve body which defines an end position of the armature via an annular collar or a stop plate supported on the annular collar. In this end position is the anchor, if the
  • Solenoid is de-energized. From this end position, the armature moves in the direction of the pole core when the magnetic coil is energized.
  • the annular space surrounding the armature is limited in the radial direction by a sleeve, which is connected to the pole core and / or the
  • Valve body firmly connected, preferably welded.
  • the sleeve thus seals the annular space to the outside.
  • pole core and / or the valve body engage at least in sections in the annular magnetic coil or
  • the mammoth valve is preferably integrated in a housing part of the high-pressure fuel pump. In this way, the space requirement of the arrangement can be further reduced.
  • FIG. 1 is a schematic longitudinal section through a mammal valve according to the invention, which is integrated in a high-pressure fuel pump,
  • FIG. 2 a) an enlarged detail of FIG. 1 in the region of a working air gap between pole core and armature, and b) a detail of a top view of the pole core, FIG.
  • FIG. 3 a shows a schematic longitudinal section through an inventive inflow valve according to a second preferred embodiment limited to the area of the working air gap and b) a perspective view of the pole core,
  • FIG. 4 shows a schematic longitudinal section through a mammal valve according to the invention according to a third preferred embodiment limited to the area of the working air gap
  • FIG. 5 a shows a schematic longitudinal section through an inventive inflow valve according to a fourth preferred embodiment limited to the area of the working air gap and b) a perspective view of the pole core,
  • FIG. 6 a shows a schematic longitudinal section through an inventive mammal valve according to a fifth preferred embodiment limited to the area of the working air gap and b) a perspective view of the anchor
  • Fig. 7 is a schematic longitudinal section through an inventive mammary valve according to a sixth preferred embodiment limited to the area of the working air gap and
  • Fig. 8 is a schematic longitudinal section through a mammal valve according to the invention according to a seventh preferred embodiment limited to the area of the working air gap.
  • the illustrated in Fig. 1 electromagnetically actuated mammary valve 1 is integrated into a housing part 20 of a high pressure fuel pump 2 in such a way that a valve member 14 of the mammal valve 1 is guided in a liftable manner via a bore 22 formed in the housing part 20.
  • the mammal valve 1 serves to fill a high-pressure element space 23 formed in the housing part 20 with fuel.
  • the high pressure element space 23 via the mammal valve 1 supplied fuel is compressed in the high-pressure element space 23 via the lifting movement of a pump piston 24 and then via a
  • Outlet valve 25 a high-pressure accumulator (not shown) supplied.
  • the valve member 14 of the mammal valve 1 opens into the high-pressure element space 23. In the closing direction, it is acted upon by the spring force of a valve spring 26, which pulls the valve member 14 in the direction of a valve seat 27.
  • another spring 15 is provided whose spring force is greater than that of the valve spring 26.
  • the further spring 15 is supported on the one hand on an armature 4 which can be coupled to the valve member 14, and on the other hand on a pole core 5, which is opposite the armature 4 at a working air gap 6.
  • the spring 15 presses the armature 4 against a supported on a collar 17 of a valve body 16 stop plate 18 which defines an end position of the armature 4. In this position, the armature 4 holds the valve member 14 open. If the magnetic coil 3 is energized, forms a magnetic field whose magnetic force moves the armature 4 in the direction of the pole core 5 to the working air gap 6 to conclude. In this case, the armature 4 detaches from the valve member 14, so that the
  • Valve spring 26 is able to pull the valve member 14 in the valve seat 27.
  • the pole core 5 forms a stroke stop for the armature 4.
  • the stroke of the armature 4 is thus characterized by the position of the pole core 5 with respect to
  • Valve body 16 fixedly connected via a sleeve 19.
  • the sleeve 19 is preferably welded both to the pole core 5 and to the valve body 16. In this way, at the same time a seal of an annular space 10 is achieved, which surrounds the armature 4 and is filled with fuel. Because the
  • Annular space 10 is connected via the working air gap 6 and a plurality of passages 21 passing through the armature 4 to an inlet region 28 of the high-pressure pump 2.
  • the flow openings 21 allow pressure equalization during a stroke movement of the armature. 4
  • the pole core 5 has an abutment surface 7 facing the armature 4, which has areas 9 which project back from a stop surface 8 of the armature 4.
  • Areas 9 are formed by a structure 12 having a plurality of intersecting grooves (see Fig. 2b). This means that the working air gap 6 between the pole core 5 and the armature 4 is connected via the structure 12 to the annular space 10. As a result, fuel can flow from the annular space 10 into the working air gap 6 faster when the armature 4 is released from the pole core 5 in order to assume its starting position again after a stroke. In this way, a hydraulic bonding of the armature 4 on the pole core 5 is counteracted.
  • the recessed areas 9 can also be formed by grooves 11.
  • An embodiment with radially extending grooves 11 in the abutment surface 7 of the pole core 5 is shown by way of example in FIGS. 3a and 3b. Through the grooves 11 of the working air gap 6 is also connected to the annular space 10, so that the
  • FIG. 1 Another embodiment for providing a recessed portion 9 is shown in FIG.
  • the pole core 5 has a
  • Working air gap 6 delimiting surface 13 which is conically shaped. As a result, the working air gap 6 opens towards the annular space 10.
  • the recessed area 9 created by the surface 13 thus has the same effect as the previously described structure 12 or the grooves 11.
  • the armature 4 may have in its stop surface 8 radially extending grooves 11 which the
  • FIGS. 6a and 6b Connect working air gap 6 to the annular space 10.
  • This embodiment is shown by way of example in FIGS. 6a and 6b.
  • the grooves 11 are arranged in the region of the flow-through openings 21, so that these too are connected to the annular space 10.
  • the armature 4 may also have only one conically shaped surface 13 which extends beyond the flow-through openings 21 (FIG. 8).
  • the stop surface 8 is reduced in this case to a small annular surface radially inwardly adjacent to the surface 13, so that a fast

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)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne une soupape d'aspiration (1) à commande électromagnétique pour une pompe à carburant haute pression (2), ladite soupape d'aspiration comprenant une bobine magnétique (3) annulaire destinée à agir sur un induit (4) pouvant effectuer un mouvement de va-et-vient, lequel induit délimite un entrefer de travail (6), conjointement avec un noyau polaire (5). Selon l'invention, l'induit (4) et/ou le noyau polaire (5) présentent une surface de butée (7, 8), tournée vers l'entrefer de travail (6), qui est réduite par au moins une zone en retrait (9), par rapport à la surface de section individuelle respective, ladite au moins une zone en retrait (9) reliant l'entrefer de travail (6) à un espace annulaire (10) qui entoure l'induit (4). En outre, l'invention concerne une pompe à carburant haute pression (2) pourvue d'une soupape d'aspiration (1) de ce type.
PCT/EP2019/059255 2018-06-06 2019-04-11 Soupape d'aspiration à commande électromagnétique et pompe à carburant haute pression Ceased WO2019233662A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018208909.4 2018-06-06
DE102018208909.4A DE102018208909A1 (de) 2018-06-06 2018-06-06 Elektromagnetisch betätigbares Saugventil und Kraftstoff-Hochdruckpumpe

Publications (1)

Publication Number Publication Date
WO2019233662A1 true WO2019233662A1 (fr) 2019-12-12

Family

ID=66182559

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/059255 Ceased WO2019233662A1 (fr) 2018-06-06 2019-04-11 Soupape d'aspiration à commande électromagnétique et pompe à carburant haute pression

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Country Link
DE (1) DE102018208909A1 (fr)
WO (1) WO2019233662A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022147125A1 (fr) * 2020-12-31 2022-07-07 Cummins Inc. Pompe à carburant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2024252603A1 (fr) * 2023-06-08 2024-12-12

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016208961A1 (de) * 2016-05-24 2017-11-30 Robert Bosch Gmbh Elektromagnetisch betätigbares Saugventil und Kraftstoff-Hochdruckpumpe
DE102016208956A1 (de) * 2016-05-24 2017-11-30 Robert Bosch Gmbh Elektromagnetisch betätigbares Saugventil und Kraftstoff-Hochdruckpumpe
DE102016211679A1 (de) 2016-06-29 2018-01-04 Robert Bosch Gmbh Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil
DE102016218846A1 (de) * 2016-09-29 2018-03-29 Robert Bosch Gmbh Elektromagnetisch betätigbares Einlassventil und Kraftstoff-Hochdruckpumpe
DE102016219244A1 (de) * 2016-10-05 2018-04-05 Robert Bosch Gmbh Elektromagnetisch betätigbares Saugventil und Kraftstoff-Hochdruckpumpe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016208961A1 (de) * 2016-05-24 2017-11-30 Robert Bosch Gmbh Elektromagnetisch betätigbares Saugventil und Kraftstoff-Hochdruckpumpe
DE102016208956A1 (de) * 2016-05-24 2017-11-30 Robert Bosch Gmbh Elektromagnetisch betätigbares Saugventil und Kraftstoff-Hochdruckpumpe
DE102016211679A1 (de) 2016-06-29 2018-01-04 Robert Bosch Gmbh Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil
DE102016218846A1 (de) * 2016-09-29 2018-03-29 Robert Bosch Gmbh Elektromagnetisch betätigbares Einlassventil und Kraftstoff-Hochdruckpumpe
DE102016219244A1 (de) * 2016-10-05 2018-04-05 Robert Bosch Gmbh Elektromagnetisch betätigbares Saugventil und Kraftstoff-Hochdruckpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022147125A1 (fr) * 2020-12-31 2022-07-07 Cummins Inc. Pompe à carburant

Also Published As

Publication number Publication date
DE102018208909A1 (de) 2019-12-12

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