WO2017050463A1 - 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
WO2017050463A1
WO2017050463A1 PCT/EP2016/067673 EP2016067673W WO2017050463A1 WO 2017050463 A1 WO2017050463 A1 WO 2017050463A1 EP 2016067673 W EP2016067673 W EP 2016067673W WO 2017050463 A1 WO2017050463 A1 WO 2017050463A1
Authority
WO
WIPO (PCT)
Prior art keywords
armature
inlet valve
valve member
magnet armature
opening
Prior art date
Application number
PCT/EP2016/067673
Other languages
German (de)
English (en)
Inventor
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 WO2017050463A1 publication Critical patent/WO2017050463A1/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
    • F02M59/44—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 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 operable inlet valve for a high-pressure pump of a fuel injection system is known from DE 10 2013 220 593 A1.
  • the high-pressure pump has at least one pump element with one in one
  • the pump working space can be connected to an inlet for the fuel via the inlet valve.
  • the inlet valve comprises a valve member which cooperates with a valve seat for control and which is movable between an open position and a closed position. In its closed position, the valve member comes to rest against the valve seat.
  • the inlet valve comprises an electromagnetic actuator, through which the valve member is movable.
  • the electromagnetic actuator has a magnet coil and a magnet armature which acts on the valve member via an anchor bolt connected thereto. The anchor bolt is pressed in, for example, into a central bore of the magnet armature.
  • the magnet armature is displaceably guided via its outer jacket in a receptacle and limits on its side facing the valve member a first space and on its side remote from the valve member a second space.
  • the two rooms are filled with liquid, ie fuel.
  • the magnet armature In order to enable a volume balance between the two spaces during the movement of the magnet armature is the magnet armature with several openings in Form of holes that connect the two spaces together. The holes must have a sufficiently large flow area to allow volume compensation of the two rooms without heavy throttling.
  • the intake valve according to the invention with the features of claim 1 has the advantage that a sufficiently large flow area can be provided by the at least one in the circumferential direction a greater extent than in the radial direction opening as well as in the radial direction a sufficiently large wall thickness of Magnetic anchor is preserved.
  • FIG. 1 shows a schematic longitudinal section through a high-pressure pump
  • Figure 2 shows an enlarged view of a designated II in Figure 1 section with the inlet valve of the high pressure pump
  • Figure 3 is a magnet armature of the inlet valve in a cross section along line III-III in Figure 2 according to a first Embodiment and figure
  • a high pressure pump is shown in fragmentary form, which is provided for the production of 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 of a housing part 16 of the high pressure pump and in the cylinder bore 14 a pump working space 18 limited.
  • a drive for the pump piston 12 a
  • Drive shaft 20 may be provided with a cam 22 or eccentric on which the pump piston 12 is supported directly or via a plunger, for example a roller tappet.
  • the pump working chamber 18 can be connected to a fuel inlet 26 via an inlet valve 24 and via an outlet valve 28 to a reservoir 30.
  • the pump working chamber 18 can be filled with fuel when the inlet valve 24 is open.
  • the delivery stroke of the pump piston 12 is displaced by this fuel from the pump working chamber 18 and conveyed into the memory 30.
  • the housing part 16 of the high-pressure pump as shown in FIG.
  • the inlet valve 24 has a piston-shaped valve member 34 which has a shaft 36 slidably guided in the through-bore 32 and a diameter in relation to the
  • Shaft 36 has larger head 38 which is arranged in the pump working chamber 18.
  • a valve seat 40 is formed on the housing part 16, with which the valve member 34 cooperates with a formed on its head 38 sealing surface 42.
  • the through hole 32 has a larger diameter than in the shaft 36 of the valve member 34 leading section, so that the shaft 36 of the valve member 34 surrounding annular space 44 is formed.
  • the annular space 44 open one or more inlet holes 46, on the other hand on the outside of the
  • valve member 34 open.
  • the shaft 36 of the valve member 34 protrudes on the pump working chamber 18 side facing away from the housing part 16 out of the through hole 32 and on this a support member 48 is attached.
  • a valve spring 50 is supported on the support element 48, which on the other hand is supported on a region 52 of the housing part 16 surrounding the shaft 36 of the valve member 34.
  • the valve spring 50 is formed for example as a helical compression spring.
  • the inlet valve 24 is actuated by an electromagnetic actuator 60.
  • the actuator 60 is controlled by an electronic control device 62 as a function of operating parameters of the internal combustion engine to be supplied.
  • the electromagnetic actuator 60 has a magnetic coil 64, a magnetic core
  • the electromagnetic actuator 60 is arranged on the pump working chamber 18 side facing away from the inlet valve 24.
  • the magnetic core 66, the magnetic coil 64 and the magnet armature 68 are arranged in an actuator housing 70 which can be fastened to the housing part 16 of the high-pressure pump.
  • the actuator housing 70 can be fastened to the housing part 16, for example, by means of a screw ring 72 which overlaps it and which is screwed onto a collar 74 of the housing part 16 provided with an external thread.
  • the armature 68 is formed at least substantially cylindrical and slidably guided over its outer jacket in a bore 76 in the actuator housing 70.
  • the bore 76 in the actuator housing 70 extends at least approximately coaxially to the through hole 32 in the housing part 16 and thus to the valve member 34.
  • the armature 68 also has an at least approximately coaxially to the longitudinal axis 69 of the armature 68 arranged central bore 78, in which a on The return spring 80 arranged facing away from the valve member 34 of the magnet armature 68 projects, which is supported on the magnet armature 68.
  • the return spring 80 is at least indirectly supported on the actuator housing 70 at its other end.
  • an intermediate element 82 is inserted, which may be designed as an anchor bolt.
  • Anchor bolt 82 is preferably inserted into the bore 78 of the magnet armature 68. pressed.
  • the return spring 80 may also be supported in the bore 78 on the anchor bolt 82.
  • an annular shoulder 84 is formed by a reduction in diameter between the armature 68 and the inlet valve 24, through which the movement of the armature 68 is limited to the inlet valve 24 out. If the actuator housing 70 is not yet attached to the housing part 16 of the high pressure pump, the armature 68 is secured by the annular shoulder 84 against falling out of the bore 76. Between the annular shoulder 84 and the armature 68, a disc 86 may be arranged. By the armature 68 is on the valve member 34 side facing a first space 88 and on the valve member 34 side facing away from a second space 90 limited. Both rooms 88,90 are filled with the pumped medium of the high pressure pump, so fuel. In order to enable a volume balance between the two spaces 88,90 in the movement of the armature 68, the armature 68 has at least one through opening 92 which connects the two spaces 88,90 together.
  • the at least one opening 92 in the circumferential direction of the armature 68 has a greater extent than in the radial direction of the armature 68.
  • the opening 92 thus has no circular cross-section but a circumferentially elongated cross-section.
  • the opening 92 is designed in the form of a slot which extends over its longitudinal extent straight and at least approximately tangentially in the armature 68.
  • a wall thickness s which is sufficiently large to allow a secure press fit of the anchor bolt 82 in the bore 78.
  • four openings 92 distributed uniformly over the circumference of the magnet armature 68 may be provided.
  • the at least one opening 92 has a curved course over its longitudinal extension, corresponding to the curvature of the magnet armature 68.
  • the radial distance s between see the inner edge of the opening 92 and the outer edge of the bore 78 is at least approximately constant over the longitudinal extent of the opening 92.
  • the at least one opening 92 may be inserted into the armature 68 by a chip-removing method such as drilling or milling.
  • Magnetic armature 68 can also be produced in a pressing process, in which case the at least one opening 92 can be produced directly in the pressing process and subsequently no machining process is required.
  • the magnet armature may be made of a sintered material in a sintered press process.
  • the inlet valve 24 is opened by the valve member 34 is in its open position, in which this is arranged with its sealing surface 42 away from the valve seat 40.
  • the movement of the valve member 34 in its open position is effected by the prevailing between the fuel inlet 26 and the pump working chamber 18 pressure difference against the force of the valve spring 50.
  • the magnetic coil 64 of the actuator 60 may be energized or de-energized. When the magnet coil 64 is energized, the magnet armature 68 is pulled by the resulting magnetic field against the force of the return spring 80 to the solenoid coil 64 out.
  • the armature 68 When the solenoid 64 is deenergized, the armature 68 is urged toward the inlet valve 24 by the force of the return spring 80. The magnet armature 68 abuts against the end face of the shaft 36 of the valve member 34 via the anchor bolt 82.
  • the actuator 60 determines whether the valve member 34 of the inlet valve 24 is in its open position or closed position.
  • the magnet armature 68 is pressed by the return spring 80 in the direction of adjustment according to arrow B in FIG. 2, wherein the valve member 34 is pressed by the magnet armature 68 against the valve spring 50 in the direction of adjustment B into its open position.
  • the force of the force acting on the armature 68 return spring 80 is greater than the force of the valve member 34 acting on the valve spring 50.
  • the armature 68 acts on the valve member 34 and the armature 68 and the valve member 34 are together in the direction of adjustment B emotional.
  • the Solenoid 64 is not energized can thus be promoted by the pump piston 12 no fuel in the memory 30 but displaced by the pump piston 12 fuel is fed back into the fuel inlet 26. If during the delivery stroke of the pump piston 12 fuel is to be conveyed into the reservoir 30, the magnetic coil 64 is energized, so that the magnet armature 68 is pulled toward the solenoid coil 64 in a direction opposite to the direction of adjustment B as indicated by arrow A in FIG.
  • the armature 68 thus no longer exerts force on the valve member 34, wherein the magnet armature 68 is moved by the magnetic field in the direction A and the valve member 34 independent of the armature 68 due to the valve spring 50 and between the pump working chamber 18 and the fuel inlet 26 prevailing pressure difference in the direction of adjustment A is moved to its closed position.
  • the delivery rate of the high-pressure pump can be set variably in the memory 30.
  • the intake valve 34 is kept open by the actuator 60 during a large part of the delivery stroke of the pump piston 12, and if a large fuel delivery amount is required, the intake valve 34 becomes only for a small part or not at all during the delivery stroke the pump piston 12 is kept open.

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)

Abstract

L'invention concerne une soupape d'admission (24) à commande électromagnétique destinée à une pompe haute pression, en particulier d'un système d'injection de carburant. La soupape d'admission (24) présente un élément soupape (34) mobile entre une position d'ouverture et une position de fermeture. Un actionneur électromagnétique (60) permet de déplacer l'élément soupape (34), l'actionneur électromagnétique (60) présentant un induit magnétique (68) agissant au moins indirectement sur l'élément soupape (34). L'induit magnétique (68) définit un premier espace (88) sur son côté faisant face à l'élément soupape (34) et un second espace (90) sur son côté opposé à l'élément soupape (34), le premier espace (88) et le second espace (90) communiquant par au moins une ouverture (92) ménagée dans l'induit magnétique (68). La ou les ouvertures (92) ménagées dans l'induit magnétique (68) présentent dans la direction périphérique de l'induit magnétique (68) une étendue plus grande que dans la direction radiale par rapport à l'axe longitudinal (69) de l'induit magnétique.
PCT/EP2016/067673 2015-09-23 2016-07-25 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission WO2017050463A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015218284.3 2015-09-23
DE102015218284.3A DE102015218284A1 (de) 2015-09-23 2015-09-23 Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil

Publications (1)

Publication Number Publication Date
WO2017050463A1 true WO2017050463A1 (fr) 2017-03-30

Family

ID=56555384

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/067673 WO2017050463A1 (fr) 2015-09-23 2016-07-25 Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission

Country Status (2)

Country Link
DE (1) DE102015218284A1 (fr)
WO (1) WO2017050463A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110410312A (zh) * 2018-04-28 2019-11-05 托马斯马格尼特股份有限公司 电流体组件及其操作方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1517341A2 (fr) * 2003-09-17 2005-03-23 Denso Corporation Actionneur électromagnétique, procédé de son fabrication et soupape d?injection de carburant
WO2006138083A1 (fr) * 2005-06-17 2006-12-28 Caterpillar Inc. Actionneur electromagnetique et procede pour controler un flux de fluide
EP2055931A1 (fr) * 2007-10-29 2009-05-06 Hitachi Ltd. Pompe à carburant haute pression de type à piston
DE102013210870A1 (de) * 2013-06-11 2014-12-11 Robert Bosch Gmbh Magnetventil
WO2015055701A1 (fr) * 2013-10-15 2015-04-23 Continental Automotive Gmbh Vanne

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013220593A1 (de) 2013-10-11 2015-04-16 Robert Bosch Gmbh Elektromagnetisch ansteuerbares Saugventil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1517341A2 (fr) * 2003-09-17 2005-03-23 Denso Corporation Actionneur électromagnétique, procédé de son fabrication et soupape d?injection de carburant
WO2006138083A1 (fr) * 2005-06-17 2006-12-28 Caterpillar Inc. Actionneur electromagnetique et procede pour controler un flux de fluide
EP2055931A1 (fr) * 2007-10-29 2009-05-06 Hitachi Ltd. Pompe à carburant haute pression de type à piston
DE102013210870A1 (de) * 2013-06-11 2014-12-11 Robert Bosch Gmbh Magnetventil
WO2015055701A1 (fr) * 2013-10-15 2015-04-23 Continental Automotive Gmbh Vanne

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110410312A (zh) * 2018-04-28 2019-11-05 托马斯马格尼特股份有限公司 电流体组件及其操作方法

Also Published As

Publication number Publication date
DE102015218284A1 (de) 2017-03-23

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