Classifications

• • 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
• • 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
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
• • 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
  • H01F7/1607—Armatures entering the winding
• • 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
  • H01F7/081—Magnetic constructions
  • H01F2007/085—Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material
• • 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
  • H01F7/1607—Armatures entering the winding
  • H01F2007/163—Armatures entering the winding with axial bearing
• • 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

Definitions

• the present invention relates to an electromagnetic camshaft adjusting device according to the preamble of the main claim.
• Such a device is known from DE 20 2008 013 654 of the applicant and describes a provided on an end face of a camshaft of an internal combustion engine device, which is in axial position to this engine camshaft and in response to energization of the stationary coil unit and thereby caused by moving the armature unit causes an axial movement of the camshaft adjustment (more precisely: a valve spool).
• an armature unit formed from an axial armature tappet 10 and a cup-shaped armature section 12 is guided in the axial direction so as to be movable to a stationary coil unit 14 (winding on coil support);
• a yoke-core unit consisting of a yoke portion 16 and a core portion 18 integrally thereon is formed, wherein the unit 16, 18 integrally with a double Conically tapered transition section 20 is formed;
• This transition section is on the one hand, both units 16, 18 integrally and thus centered form, on the other hand (by the reduced thickness) to effect a rapid saturation of the magnetic flux, therefore, so that both elements 16, 18 magnetically largely separate from each other.
• a ball 24 is rollably mounted on the armature in a recess 22 on the engagement side, which can receive transverse movements or axial displacement of the cooperating camshaft unit 26 in the manner shown; this, consisting of a through the armature unit in the axial direction (ie down in the figure) adjustable valve spool (valve slide unit) 28, a radially surrounding valve housing 30 and a (rotating with the camshaft speed) camshaft 32, via a pressed-end cap 34 with the ball 24 and thus connected to the anchor unit.
• the yoke-core unit 16, 18, the coil unit 14 and the surrounding housing 36 are provided stationary on the engine block; the armature unit 10 is displaceably mounted only in the axial direction, wherein the ball 24 receives a rotational movement of the camshaft unit.
• Object of the present invention is therefore to reduce an electromagnetic camshaft adjusting device according to the preamble of the main claim in terms of their axial length, while reducing the design and assembly costs.
• the object is achieved by the electromagnetic Ncckenwellen- adjusting device with the features of the main claim; advantageous developments of the invention are described in the subclaims.
• the yoke and core unit (also yoke-core unit) is rotatable relative to the coil unit (i.e., rotatable about the axial direction), with the armature unit guided therein with the slider unit firmly attached to it.
• valve slide unit (slide unit) directly into or on the armature unit, insofar to establish a firm connection between the armature unit and adjusting element of the camshaft adjustment.
• the approximately in the form of the combination of cap (reference numeral 34 in Fig. 3) and ball (24) formed storage is unnecessary.
• the yoke and core unit on the shell side on a (already existing) housing section, preferably on an inner wall area of the housing (second stationary housing wall section) surrounding the stationary coil unit.
• the yoke and core unit integrally reinforced further advantageous and further education by a politicianssutragendes (aufzusch spaendes) non-magnetic material in the transition region and then additionally used this transition region material to the unit in the form of an axial bearing against another (
• First support housing section is a highly resilient, very easy to produce and minimized manufacturing and assembly costs device created.
• the radial bearing between the yoke and core unit on the one hand and the stationary housing wall in the form of a sliding bearing which is suitable (for preventing magnetic leakage) with a non-magnetic material, e.g. coated by means of build-up welding, so that the effort can be minimized here as well.
• this radial bearing by a bushing or the like additional mechanical element, which is suitably and advantageously also realized from non-magnetic material implemented.
• the slide unit (valve slide) is firmly seated on the anchor unit (for example by a suitable interference fit) made of non-magnetic material and therefore does not affect the operation of the actual electromagnetic actuator section in the interaction between the armature and yoke core.
• the anchor unit for example by a suitable interference fit
• the present invention with a significant reduction of the component complexity, simultaneously with the possibility of minimizing the axial extent (in particular from the end face of the camshaft arrangement), a way has been created which minimizes the problem of compact installation space with the greatest possible reliability, simple manufacturing and To combine mountability.
• Figure 1 is a schematic longitudinal sectional view through the electromagnetic camshaft adjusting device according to a first preferred embodiment of the invention
• Figure 2 is a view similar to Figure 1 of a second embodiment, but with a realized by means of a separate bearing bush radial bearings and
• FIG. 3 shows an illustration of a device for clarifying the technology used for the generic term.
• Figure 1 illustrates a ring-like with an outer annular flange 40 encircling housing 42 which forms an inner, hollow cylindrical housing wall 44 which extends a predetermined portion along the axial direction x.
• a coil 48 is provided in an otherwise known manner on a bobbin carrier unit 46, which can be energized in an otherwise known manner for moving the armature unit 50 in the axial direction.
• the armature unit in the described embodiment cup-shaped with a diameter-tapered engagement portion 52, is in an otherwise known manner, e.g. with the interposition of an armature guide tube (not shown) or a magnetically non-conductive coating (not shown) axially guided in a yoke and core unit, which consists of an upper yoke unit 54 and a lower core unit 56. Both units 54, 56 are, cf. 3, tapered in the direction of an axial transition section in a double-conical manner, wherein in the embodiment shown a mechanical reinforcement in the form of a weld-on of non-magnetic material 58 (more precisely: CuZn) is provided.
• this material has been applied and subsequently reworked by twisting in order to fit in the radial direction into the clearance formed by the lower open housing wall 54 and the bobbin 56, simultaneously in contact with a lower, disc-shaped housing cover 60 , a sliding bearing (as thrust bearing) form:
• armature 50, 52 anssitzender valve slide unit (slide unit) 62, yoke and core unit 54, 56, 58, rotatably (rotatably) guided within the hollow cylindrical vertical wall 44 of the housing, so that the unit can rotate with the rotation of the camshaft 32;
• a feed movement of the armature unit 50, 52 with axially fixed (by press fitting) ansitzender slider unit 56 could take place so far as to effect the desired camshaft adjustment functionality.
• the core unit 56 integrally merges into a valve housing section 64, which in this respect corresponds to the unit 30 in FIG. 3 and can rotate (via the non-magnetic material 58 applied at the transition area) due to its fixed connection to the yoke unit 54.
• the armature movement in the axial direction (x) then causes in an otherwise known manner an axial relative displacement between the units 62 and 56/64.
• FIG. 2 illustrates (with otherwise identical reference symbols and correspondingly identical functional components) a variant of the embodiment according to FIG. 1.
• this functionality is replaced by a bearing bushing 70, which is formed in this transition region between the wall section 44 of the housing and the yoke section 54 of the yoke and core section in order to enable the radial bearing functionality.
• a bearing bushing 70 which is formed in this transition region between the wall section 44 of the housing and the yoke section 54 of the yoke and core section in order to enable the radial bearing functionality.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Valve Device For Special Equipments (AREA)
• Valve-Gear Or Valve Arrangements (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=42313896

Family Applications (1)

Country Status (6)

Families Citing this family (5)

Family Cites Families (10)

• 2009
  • 2009-04-03 DE DE202009004611U patent/DE202009004611U1/de not_active Expired - Lifetime
• 2010
  • 2010-03-24 US US13/262,243 patent/US8402934B2/en active Active
  • 2010-03-24 EP EP10716280A patent/EP2252774B1/fr active Active
  • 2010-03-24 WO PCT/EP2010/001833 patent/WO2010112162A1/fr active Application Filing
  • 2010-03-24 AT AT10716280T patent/ATE527437T1/de active
  • 2010-03-24 CN CN2010800155318A patent/CN102369341B/zh active Active

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events