Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23F—MAKING GEARS OR TOOTHED RACKS
  • B23F1/00—Making gear teeth by tools of which the profile matches the profile of the required surface
  • B23F1/02—Making gear teeth by tools of which the profile matches the profile of the required surface by grinding
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
  • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
  • H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
  • H01F7/126—Supporting or mounting
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
  • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
  • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
  • F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L2820/00—Details on specific features characterising valve gear arrangements
  • F01L2820/03—Auxiliary actuators
  • F01L2820/031—Electromagnets
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
  • H01F7/16—Rectilinearly-movable armatures
  • H01F7/1638—Armatures not entering the winding
  • H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet

Definitions

• the present invention relates to an electromagnetic actuator according to the preamble of the main claim.
• a device is known from DE 102 40 774 of the applicant and is used for a variety of control tasks, such as in connection with internal combustion engines.
• Fig. 5 illustrates the constructive realization of a presumed as known electromagnetic actuator.
• a stationary core unit 32 is provided, wherein a coil carrier 34 is provided with a winding 36 provided thereon radially between them.
• armature unit which has an elongate ram unit 42, which forms an engagement end 44 end.
• the engagement end 44 opposite and for magnetic interaction with the core unit, the armature unit has a multi-disc-shaped arrangement consisting of a permanent magnet disc 38 and, on both sides adjacent thereto, a first and second armature disc 48, 50. Enclosed on the shell side, this arrangement of a binding ring 52nd
• the armature unit adheres to the core 32 by the action of the permanent magnet 38. Energizing the winding 36 then generates a repulsive field, whereby the armature unit (in the plane of the figure to the right) is moved axially and correspondingly an actuator, end acting on the engagement end 44, can be driven.
• FIG. 5 illustrates, constructive principle of the known technology, the ram unit 42 as part of the anchor unit and thus rigidly to the disc pack 48, 38, 50 to order; These units are not separable and therefore require an as far as possible radially symmetrical installation contour for efficient installation.
• FIG. 6 as a schematic installation contour on an internal combustion engine (specifically, the installation space for an electromagnetic actuator for adjusting the camshaft) illustrates the real space conditions at a place of use; 7 merely shows symbolically that a traditional radially symmetrical arrangement according to FIG.
• Object of the present invention is therefore to improve a generic electromagnetic actuator with a view to ease of manufacture and flexibility in use, in particular to improve their suitability for asymmetric installation conditions (which are to be understood as "asymmetric" in the context of the present invention, such installation conditions, which , relative to a direction of movement of the plunger unit, are not radially symmetric).
• the present invention achieves an overcoming of the mechanically rigid, non-detachable and radially symmetrical connections.
• Connection between tappet unit (more precisely: tappet section) and armature unit.
• this is replaced by an actuator unit on which magnetically adhesive and releasably the ram unit is seated as a separate component.
• this ram unit is also eccentrically (or possibly even only partially overlapping with its end face) seated on the engagement surface of the actuator unit, in other words, is capable of itself the actuator unit to form an asymmetric, so non-radially symmetrical arrangement and to adapt to suitable space.
• the actuator unit itself is in turn realized by means of an armature unit, which in an otherwise known manner has permanent magnet means, which cooperate with a stationary core unit and can be moved in response to the energization of a stationary coil unit.
• This Aktorenmanteltician can now not completely closed shell side, but also only bow-shaped (i.e., in the longitudinal section U-shaped), or even L-shaped with only one free leg.
• the disc-shaped permanent magnet means radially widened in relation to an elongate armature tappet portion of the armature guided within the core unit in order to improve the magnetic properties.
• the core unit is according to preferred embodiments of the invention suitable to adapt to a particular application and to improve about by means of a fluid pressure equalization enabling passage dynamically.
• the plunger unit on the engagement side ie in the region of its engagement-side end face and for interaction with the engagement surface, soft magnetic (in particular by realization of soft iron in this area) designed so that a problem-free magnetic adhesion to the actuator unit or its engagement surface he follows.
• the present invention thus makes it possible to adapt to asymmetrical installation conditions in a very flexible manner. Accordingly, the electromagnetic actuating device of the present invention is particularly suitable for a wide variety of uses in asymmetric installation spaces, as they often occur in internal combustion engines for performing a wide variety of control functions, such as a camshaft adjustment.
• FIG. 2 shows a perspective view for illustrating an asymmetrical arrangement of a plunger unit on the engagement surface of an actuator unit with a bow-shaped actuator shell unit according to a second embodiment of the invention
• Fig. 3 a representation analogous to FIG. 2 with here radially symmetrically releasably attached plunger unit and
• FIG. 4 shows a view similar to FIG. 2, FIG. 3 with a pair of plunger units mounted together on an engagement surface.
• Fig. 1 shows in the schematic longitudinal sectional view, as a ram unit 10 with a soft iron portion magnetically adhering and releasably on an engagement surface 12 of an anchor unit 14, which in turn axially movable in a stationary core unit 16 and movable relative to this in response to the energization of a Coil 18 (which in turn is held on a bobbin 20) is guided.
• the armature unit 14 has on the engagement side a disk-like arrangement consisting of a front armature disk 22, a permanent magnet unit 24 and a core-side armature disk 26 and is continued by an armature tappet portion 28 which can move in the manner shown in a hollow cylindrical interior of the core unit 16.
• the disc assembly 22, 24, 26, for example, by welding the discs 22, 26 made of magnetically conductive steel with the end of the plunger 28 fixed and permanently connected thereto.
• the core unit 16 is opened by means of a bore 29.
• the plunger unit 10 is fully or partially adhered by its magnetic action relative to the engagement surface 12, concentric with the longitudinal axis (FIG. 3) or eccentrically (FIG. 2), so that any adaptability to respective installation conditions and installation conditions space is given. It is obvious that a configuration of the type shown in Fig. 1 can be easily adapted to the specification of Fig. 6, while maximizing the available space for the solenoid unit shown.
• the plunger unit 10 is magnetically implemented so that it has a soft magnetic section, preferably made of soft iron, in the direction of the armature unit and for adhesive cooperation with the permanent magnet unit 24 on the engagement surface 12.
• a soft magnetic section preferably made of soft iron
• this is hard and wear-resistant, so far as to achieve long service life in a continuous operation about the camshaft adjustment.
• Both sections may be configured by appropriate material influences (such as hardening a soft iron plunger body to form the wear resistant section), alternatively by the non-detachable assembly of two different (e.g., metal) materials by welding or the like.

Landscapes

• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Mechanical Engineering (AREA)
• Valve Device For Special Equipments (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=41427635

Family Applications (1)

Country Status (6)

Cited By (3)

Families Citing this family (17)

Citations (2)

Family Cites Families (8)

• 2009
  • 2009-08-03 JP JP2011520386A patent/JP5444345B2/ja active Active
  • 2009-08-03 WO PCT/EP2009/005599 patent/WO2010012498A1/de not_active Ceased
  • 2009-08-03 EP EP09777607.4A patent/EP2191107B1/de active Active
  • 2009-08-03 CN CN200980130114.5A patent/CN102112709B/zh active Active
  • 2009-08-03 DE DE202009010495U patent/DE202009010495U1/de not_active Expired - Lifetime
  • 2009-08-03 US US13/056,880 patent/US8493166B2/en active Active

Patent Citations (2)

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