WO2019197067A1 - Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission - Google Patents

Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission Download PDF

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Publication number
WO2019197067A1
WO2019197067A1 PCT/EP2019/053254 EP2019053254W WO2019197067A1 WO 2019197067 A1 WO2019197067 A1 WO 2019197067A1 EP 2019053254 W EP2019053254 W EP 2019053254W WO 2019197067 A1 WO2019197067 A1 WO 2019197067A1
Authority
WO
WIPO (PCT)
Prior art keywords
return spring
valve
valve member
inlet valve
armature
Prior art date
Application number
PCT/EP2019/053254
Other languages
German (de)
English (en)
Inventor
Gabriel CICHON
Stefan Kolb
Steffen Holm
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 WO2019197067A1 publication Critical patent/WO2019197067A1/fr

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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
    • 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
    • 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

Definitions

  • the invention relates to an electromagnetically operable inlet valve for a high pressure pump, in particular a fuel injection system, according to the preamble of claim 1. Furthermore, the invention relates to a high pressure pump with such an inlet valve.
  • An electromagnetically actuated inlet valve for a high-pressure pump in particular a radial or in-line piston pump for a fuel injection system, is known from DE 10 2014 220 775 A1.
  • the high-pressure pump has at least one pump element with a pump piston driven in a lifting movement, which delimits a pump working space.
  • the pump working chamber can be connected to an inlet for the fuel via the inlet valve.
  • the inlet valve comprises a valve member, which is movable between an open position and a closed position and which comes to rest in its closed position on a valve seat. The valve member is acted upon by a valve spring in the closing direction.
  • the inlet valve comprises an electromagnetic actuator, through which the valve member is movable.
  • the electromagnetic actuator has a magnetic armature acting on the valve member, a magnetic coil, and a magnetic core for generating a magnetic field applied to the armature when the solenoid is energized.
  • the armature is acted upon by a return spring to the open position of the valve member.
  • the solenoid When the solenoid is energized, the armature is moved against the force of the return spring to the closed position of the valve member, so that the valve member is moved by the valve spring in its closed position.
  • the restoring spring is supported by a support element inserted into a receptacle on the magnetic core.
  • the support element can be fixed in different positions in the direction of the longitudinal axis of the magnet armature in the receptacle in order to set a required defined pretensioning of the return spring.
  • the return spring protrudes with its end region facing the magnetic core more or less far into the receptacle in the magnet core.
  • the end region of the return spring protrudes sufficiently far into the receptacle in the magnetic core.
  • the inlet valve according to the invention with the features of claim 1 has the advantage that regardless of the position of the support element, the required guidance of the end portion of the return spring is ensured and thus the safe operation of the inlet valve over its lifetime is guaranteed.
  • FIG. 1 shows a schematic longitudinal section through a high-pressure pump and
  • FIG. 2 shows an enlarged view of a detail designated II in FIG. 1 with the inlet valve of the high-pressure pump.
  • FIG. 1 shows a detail of a high-pressure pump which is provided for the purpose of conveying fuel in a fuel injection system of an internal combustion engine.
  • the high-pressure pump has at least one pump element 10, which in turn has a pump piston 12 which is driven by a drive in a lifting movement, is guided in a cylinder bore 14 and limits a pump working space 16 in the cylinder bore 14.
  • a drive shaft 18 may be provided with a cam 20 or eccentric on which the pump piston 12 is supported directly or via a plunger 21, for example a roller tappet.
  • the pump working chamber 16 can be connected to a fuel inlet 23 via an inlet valve 22 and via an outlet valve 24 to a reservoir 26.
  • the inlet valve 22 is integrated, for example, in a housing part 28 of the high-pressure pump.
  • the pump working chamber 16 can be filled with fuel when the inlet valve 22 is open.
  • this fuel displaces the pump working chamber 16 and conveys it into the reservoir 26.
  • the inlet valve 22 has a piston-shaped valve member 30, which is movably guided in the housing part 28 in a bore 32 adjoining the cylinder bore 14.
  • In the bore 32 opens in a diameter relative to the valve member 30 leading guide section enlarged section at least one, preferably a plurality of radial bores 36, which are in hydraulic shear connection with the fuel inlet 21.
  • the valve member 30 has his projecting into the pump working chamber 16 end a head 44 with respect to the shaft 46 of the valve member 30 of larger diameter.
  • an annular sealing surface 48 is formed on the head 44, with which the valve member 30 cooperates with a valve seat 50 formed on the edge of the bore 32 on the housing part 28.
  • valve member 30 protrudes with its end facing away from the pump working chamber 16 from the bore 32 and at the end region is supported via a spring plate 52 from a valve spring 54, through which the valve member 30 is acted upon in the closing direction. In its closed position, the valve member 30 with its sealing surface 48 sealingly against the valve seat 50, so that the pump working chamber 16 is separated from the fuel inlet.
  • the inlet valve 22 is actuated by an electromagnetic actuator 56.
  • the actuator 56 is controlled by an electronic control device 57 as a function of operating parameters of the internal combustion engine to be supplied.
  • the electromagnetic actuator 56 has a magnetic coil 58, a magnetic core 60 and a magnet armature 62.
  • the electromagnetic actuator 56 is arranged on the pump working chamber 16 side facing away from the inlet valve 22 net.
  • the magnetic core 60 and the magnet coil 58 are arranged in a housing part 64, which is connected to the housing part 28 of the high-pressure pump.
  • connection of the housing part 64 to the housing part 28 of the high-pressure pump takes place, for example, by means of a screw ring 65, which is screwed onto a collar 66 of the housing part 28 of the high-pressure pump provided with an external thread.
  • the armature 62 is formed at least substantially cylindrical and slidably guided over its outer shell in a bore 68 in a support member 69.
  • the bore 68 in the carrier element 69 extends at least approximately coaxially to the bore 32 in the housing part 28 of the high-pressure pump.
  • the magnet armature 62 In its end region facing the magnetic core 60, the magnet armature 62 has a central blind bore 70.
  • the armature 62 and the valve member 30 are not connected to each other.
  • an annular shoulder 71 is formed by a reduction in diameter between the armature 62 and the inlet valve 22, a stop for the magnet armature 62 for limiting its movement to the open position of Valve member 30 forms.
  • a stop element 72 may be arranged between the annular shoulder 71 and the armature 62.
  • a return spring 76 for the armature 62 is arranged, which on the one hand projects into the blind bore 70 in the armature 62 and is supported on the bottom of the blind bore 70.
  • the return spring 76 is formed as a cylindrical helical compression spring having a plurality of turns.
  • a receptacle 78 in the form of a further blind bore into which the restoring spring 76 protrudes with its end region 77 facing away from the magnet armature 62.
  • a support member 80 is fixed, on which the return spring 76 is supported.
  • the support element 80 is for example pressed into the receptacle 78, so that it can be fixed in a simple manner in different positions in the direction of the longitudinal axis 63 of the magnet armature 62.
  • the support member 80 may for example be screwed into the receptacle 78, in which case the support member 80 is provided with an external thread and the receptacle 78 with an internal thread.
  • the support element 80 can also be fixed in different positions in the receptacle 78 by means of a helical groove. The fixation of the support member 80 in different Stel lungs is required to allow adjustment of the bias of the return spring 76 at different tolerances of the various components of the inlet valve 22 tils to a predetermined value.
  • the support element 80 at least on its side facing the restoring spring 76, has an extension 82 which projects into the end region 77 of the return spring 76 with little radial play with respect to the longitudinal axis 63 of the magnet armature 62.
  • the end portion 77 of the return spring 76 includes, for example, the last two to three turns of the return spring 76, which are not or only slightly deformed in the compression and decompression of the return spring. The end portion 77 of the return spring 76 is thus guided on the extension 82 of the support member 80, so that it can not buckle laterally.
  • the immersion depth of the extension 82 in the end region 77 of The return spring 76 is independent of the position of the support element 80 in the receptacle 78 of the magnetic core 60.
  • the diameter of the extension 82 is smaller than the diameter of the area of the support element 80 fixed in the receptacle 78 and slightly smaller than the inner diameter of the end area 77 of the return spring 76.
  • the extension 82 may be formed so that it tapers towards its free end, for example, approximately frusto-conical.
  • the outer diameter of the end portion 77 of the return spring 76 is slightly smaller than the diameter of the receptacle 78, so that the end portion 77 is disposed with radial play in the receptacle 78 and the return spring 76 can freely spring in and rebound.
  • the inlet valve 22 is opened by the valve member 34 is in its open position, in which this is arranged with its sealing surface 48 away from the valve seat 50.
  • the movement of the valve member 30 in its open position is effected by the prevailing between the fuel inlet 21 and the pump chamber 16 pressure difference against the force of the valve spring 54.
  • the magnet coil 58 of the actuator 56 is energized so that the magnet armature 62 is pulled by the resulting magnetic field against the force of the return spring 78 to the solenoid coil 58 out.
  • the solenoid coil 58 is de-energized, the magnetic armature 62 is urged toward the inlet valve 22 by the force of the return spring 76 and held in abutment with the annular shoulder 71 or the stopper member 72.
  • the actuator 56 determines whether the valve member 30 of the inlet valve 22 is in its open position or closed position.
  • the magnet coil 58 is de-energized, the magnet armature 62 is pressed by the return spring 76 in a first adjusting direction according to arrow A in FIG. 1 into contact with the annular shoulder 71 or the stop element 72, the valve member 30 being pressed against the valve spring 54 by the magnet armature 62 is pressed in its first position in its open position.
  • the power the restoring spring 76 acting on the magnet armature 62 is greater than the force of the valve spring 54 acting on the valve member 30.
  • the magnet armature 62 acts on the valve member 30 and the magnet armature 62 and the valve member 30 become common in the first actuating direction A. emotional. Solange the solenoid coil 58 is not energized thus can by the pump piston
  • the delivery rate of the high-pressure pump into the storage 26 can be set variably. If a small amount of fuel is required, the inlet valve 22 is kept open by the actuator 56 during a large part of the delivery stroke of the pump piston 12, and if a large amount of fuel is required, the inlet valve 22 will only be activated for a small part or not at all of the delivery stroke of the pump piston 12 kept open.

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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)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une soupape d'admission (22) à commande électromagnétique, destinée à une pompe à haute pression, en particulier un système d'injection de carburant, qui comprend un élément de soupape (30) qui est mobile entre une position ouverte et une position fermée. Dans sa position fermée, l'élément de soupape (30) vient en appui sur un siège de soupape (50) servant de butée. L'élément de soupape (30) peut être déplacé par un actionneur électromagnétique (56), l'actionneur électromagnétique (56) comprenant une bobine magnétique (58), un noyau magnétique (60) et une armature magnétique (62) agissant sur l'élément de soupape (30). L'élément de soupape (30) est sollicité par un ressort de soupape (54) vers sa position fermée et l'armature magnétique (62) est sollicitée par un ressort de rappel (78) vers la position ouverte de l'élément de soupape (30). L'armature magnétique (62) est sollicité par un ressort de rappel (76) en direction de la position ouverte de l'élément de soupape (30), la force du ressort de rappel (76) étant supérieure à la force du ressort de soupape (54). Le ressort de rappel (76) est supporté par un élément de support (80) sur le noyau magnétique (60), qui peut être fixé au noyau magnétique (60) dans différentes positions par rapport à l'axe longitudinal (63) de l'armature magnétique (62). L'armature magnétique (62) peut être déplacée en excitant l'actionneur électromagnétique (56) contre la force du ressort de rappel (76). Au moins sur sa face tournée vers l'armature magnétique (62), l'élément de support (80) présente une extension (82) qui fait saillie dans la zone d'extrémité (77) du ressort de rappel (76) tournée vers le noyau magnétique (60). Ceci assure un guidage sûr de la section d'extrémité (77) du ressort de rappel (76), quelle que soit la position de l'élément de support (80).
PCT/EP2019/053254 2018-04-09 2019-02-11 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission WO2019197067A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018205286.7 2018-04-09
DE102018205286.7A DE102018205286A1 (de) 2018-04-09 2018-04-09 Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil

Publications (1)

Publication Number Publication Date
WO2019197067A1 true WO2019197067A1 (fr) 2019-10-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/053254 WO2019197067A1 (fr) 2018-04-09 2019-02-11 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission

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DE (1) DE102018205286A1 (fr)
WO (1) WO2019197067A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090267008A1 (en) * 2007-09-14 2009-10-29 Cummins Intellectual Properties, Inc. Solenoid actuated flow control valve including stator core plated with non-ferrous material
JP2011196435A (ja) * 2010-03-18 2011-10-06 Denso Corp 電磁弁
DE102014220775A1 (de) 2014-10-14 2016-04-14 Siemens Aktiengesellschaft Schienenfahrzeug in Aufliegerausführung
DE102016206963A1 (de) * 2016-04-25 2017-10-26 Robert Bosch Gmbh Elektromagnetisch betätigbares Saugventil für eine Hochdruckpumpe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090267008A1 (en) * 2007-09-14 2009-10-29 Cummins Intellectual Properties, Inc. Solenoid actuated flow control valve including stator core plated with non-ferrous material
JP2011196435A (ja) * 2010-03-18 2011-10-06 Denso Corp 電磁弁
DE102014220775A1 (de) 2014-10-14 2016-04-14 Siemens Aktiengesellschaft Schienenfahrzeug in Aufliegerausführung
DE102016206963A1 (de) * 2016-04-25 2017-10-26 Robert Bosch Gmbh Elektromagnetisch betätigbares Saugventil für eine Hochdruckpumpe

Also Published As

Publication number Publication date
DE102018205286A1 (de) 2019-10-10

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