EP1636465A1 - Mecanisme de commande pour soupape de changement des gaz - Google Patents

Mecanisme de commande pour soupape de changement des gaz

Info

Publication number
EP1636465A1
EP1636465A1 EP04724022A EP04724022A EP1636465A1 EP 1636465 A1 EP1636465 A1 EP 1636465A1 EP 04724022 A EP04724022 A EP 04724022A EP 04724022 A EP04724022 A EP 04724022A EP 1636465 A1 EP1636465 A1 EP 1636465A1
Authority
EP
European Patent Office
Prior art keywords
rotor
valve
gas exchange
stator
stand
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.)
Withdrawn
Application number
EP04724022A
Other languages
German (de)
English (en)
Inventor
Peter Volz
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.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
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
Priority claimed from DE10341698A external-priority patent/DE10341698A1/de
Application filed by Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP1636465A1 publication Critical patent/EP1636465A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
    • H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/10—Connecting springs to valve members
    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
    • F01L2009/2105—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids comprising two or more coils
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H02K1/2733—Annular magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2207/00—Specific aspects not provided for in the other groups of this subclass relating to arrangements for handling mechanical energy
    • H02K2207/03—Tubular motors, i.e. rotary motors mounted inside a tube, e.g. for blinds
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings

Definitions

  • the invention relates to a valve drive for a gas exchange valve according to the preamble of patent claim 1.
  • valve actuators of the specified type are known from the patent literature. For this, reference is made, for example, to DE 101 25 767 C1.
  • the air gaps in the magnetic circuit are as small as possible and suitable current coils are arranged on the stand.
  • the actuator consisting of the stator and the rotor must be in the existing, relatively small installation spaces, for. B. fit into a cylinder head of a motor vehicle internal combustion engine, which is why the current coils and the active air gap surfaces can not be built arbitrarily large.
  • the magnetic losses must be in the magnetic circuit
  • FIG. 1 shows a cross section through a cylinder head in which a valve drive with a coupling element according to the invention is arranged
  • Figure 2 is a schematic view of the in Figure 1
  • FIG. 3 shows the valve drive according to FIG. 2 in the region of the horizontal sectional plane B-B
  • FIG. 4a the valve drive according to FIG. 2 in the area of the horizontal sectional plane A-A,
  • FIG. 4b shows a spatial representation of the runner with external guide elements
  • FIG. 4c shows a spatial representation of the runner with internal guide elements
  • 5a-e show several variants for the coupling element for the detachable arrangement of the gas exchange valve on the valve drive.
  • FIG. 1 shows the arrangement of a valve drive in a cylinder head 2 of an internal combustion engine for the purpose of actuating the gas exchange valve 11 arranged on the inlet side.
  • the cylinder head 2 shown in cross section has for this purpose a first valve receiving bore 3 for guiding and sealing the gas exchange valve 11 on the inlet side and a second valve receiving bore 3 for an outlet side Gas exchange valve 4, both of which are arranged at a V angle to each other.
  • the gas exchange valves 4, 11 are designed as poppet valves, which face the valve seat rings 16 used in the inlet and outlet channels 5, 6 concentrically with their valve seat surfaces.
  • the inlet and outlet channels 5, 6 are in cross-flow technology and the gas exchange valves 4, 11 operated in a hanging arrangement according to the OHC principle (Over Head Camshaft).
  • an electromagnetic actuator as a valve drive above the inlet-side gas exchange valve 11, in the stand 1 of which an axially movable rotor 12 is arranged, which is detachably connected via a coupling element 22 to the valve stem 7 of the inlet-side gas exchange valve 11.
  • This valve drive designed as a linear motor, ensures a variable charge change, in which, depending on the activation of a current coil 23 in the stander 1, the valve opening time, the valve lift and the valve opening duration of the inlet-side gas exchange valve 11 can be set as desired.
  • the conventional valve train presented for the exhaust valve can also be replaced by the actuator described for the intake valve.
  • the invention provides that the runner 12 with the stander
  • I forms an independently manageable, preferably functionally testable assembly, which works with the gas exchange valve
  • the coupling element 22, which is arranged between the rotor 12 and the gas exchange valve 11, is necessary, which has a non-positive and / or positive locking creates bond between the rotor 12 and the gas exchange valve 11.
  • the stator 1 is coaxially aligned and fastened with the rotor 12 and the coupling element 22 attached to the rotor 12 relative to the gas exchange valve 11 in the cylinder head 2.
  • the cylinder head has a trough 24 above the inlet-side gas exchange valve 11, in which the stator 1 is fastened. Furthermore, for space-saving integration of the coupling element 22 between the valve receiving bore 3 (valve stem guide) of the inlet-side gas exchange valve 11 and the trough
  • a stepped bore 25 is provided in the cylinder head 2. Between the coupling element 22 and the bottom of the stepped bore
  • auxiliary spring 26 in order to be able to safely close the gas exchange valve 11 again in the event of a failure of the current coil 23 to avoid piston contact.
  • the stator 1 and the cam-side valve drive are covered by a cylinder head cover 27 fastened to the cylinder head 2.
  • valve drive designed as a linear motor
  • FIG. 2 shows the valve drive according to the invention presented in FIG. 1, consisting of a magnetic rotor 12, which extends with its preferably hollow-cylindrical rotor section located at a distance from the inlet-side gas exchange valve 11 within a stator 1 provided with the current coil 23, one of which extends below the stator 1 protruding end of the rotor 12
  • the stand 1 consists of a magnetic material with a radially inner region and a radially outer region.
  • the stator bore 14 and the stator core 15, which is enclosed by an internal current coil 23, are located in the inner region.
  • Both current coils 23 are radially spaced apart from one another within a stator coil chamber 28 such that an essentially hollow cylindrical rotor section is arranged axially movably between the two current coils 23.
  • This rotor section is provided with a plurality of magnetic rings 29 which are stacked concentrically one above the other and which have an alternating magnetic orientation.
  • the magnet rings 29 are arranged in a radial air gap between an internal and external tooth region 30 of the stator 1, which has two circular cylindrical teeth that are aligned with one another and face the magnet rings 29. Regardless of the number of teeth, the selected arrangement ensures that the magnetic rings 29 with the same magnetic orientation are always aligned with the assigned teeth.
  • the rotor 12 is preferably made of a plastic or a composite material, for which a combination of plastic and non-magnetic metal is particularly suitable.
  • the above-described construction of the stand 1 is provided with the current coils 23 in a duplex construction and is preferably designed in a tandem arrangement, so that two identical stands 1 facing one another with their tooth regions 30 are stacked one above the other in alignment. Between the two stands 1 there is a plate-shaped, non-magnetic spacer 10, which prevents unwanted mutual magnetic interference between the two stands 1.
  • This plane shown along the section line B-B in the lower region of the stand 1 is explained in more detail below with reference to FIG. 3.
  • FIG. 3 shows a plan view of the stand 1 along the section line BB outlined in FIG. 2, from which the opening is formed as segment-shaped openings in the first end region of the stand 1, which faces the gas exchange valve 11.
  • the openings mentioned above are implemented functionally as three bushings 8 through which three runner webs 19 arranged on the runner 12 extend.
  • the feedthroughs 8 and the runner webs 19 are arranged at a uniform angular distance so distributed over the circumference of the stand 1 that the feedthroughs 8 provided for the runner webs 19 are spaced apart from one another by a plurality of connecting webs 20 of the stand 1 that conduct magnetic flux.
  • each connecting web 20 is expediently much larger selected as the opening cross-section of each bushing 8 in order to achieve a gain in magnetically conductive stand material compared to the prior art, or to keep the magnetic losses caused by the required opening in the base yoke 9 as low as possible.
  • the stand 1 has an essentially oval shape, which is particularly evident from the representation of the stator 1 in the top view according to FIG. 3.
  • the two diametrically arranged current coils 23 arranged on the outer region of the stator 1 can also be clearly recognized as coil winding packages in FIG. 3, through which the vertically directed connection o 31 (already shown in FIG. 2) to the horizontally extending legs of the Stator 1 extends, which have the tooth region 30 mentioned above.
  • FIG. 4a shows the further stand 1 arranged above the previously described stand 1, which is arranged at a distance from the gas exchange valve 11 and at a distance from the first end region of the lower stand 1.
  • This further stand 1 has a plurality of guide elements 13a, 13b, 13c, which are arranged uniformly distributed over the outer or also over the inner circumference of the rotor 12 (see exemplary one of three guide elements 13d) in the stand 1 and which are at least in sections on the outer or inner circumference of the rotor 12 are attached.
  • the three guide elements 13a, 13b, 13c are shown in three grooves 32 of the stator 1, the groove depth in the grooves 32 being considerably larger.
  • ß is chosen as the immersion depth of the guide elements 13a, 13b, 13c in the grooves 32 in the non-heated state. This ensures that due to the thermal expansion of the rotor 12, a jam-free running play of the guide elements 13a-c in the grooves 32 is always maintained.
  • the three guide elements 13a, 13b, 13c are distributed at a uniform angular distance, preferably along the outer circumference (or possibly also along the inner circumference, see for example one of three guide elements 13d on the inside of the stand 33) of the runner 12, for which purpose in the wall of the stand 1 Grooves 32 are provided. In this way, a precise, jamming-free guidance of the end of the rotor 12 located away from the gas exchange valve 11 in the stander 1 is achieved.
  • FIG. 4a shows the internal current coil 23 fastened to the inside of the stand 33 within the stand 1, which is guided without play, and the stand core 15 arranged in the inside of the stand 33, which is penetrated in the middle by a stand bore 14.
  • FIG. 4b illustrates in a spatial representation the tubular structure of the rotor 12 with the three guide elements 13a, 13b, 13c formed on the outer circumference of the rotor, which either extend partially over the entire height of the rotor.
  • the runner webs 19 can also be seen, which, according to FIG. 3, extend into the passages 8 in the base yoke 9 of the stand 1.
  • FIG. 4 c illustrates in a spatial representation the tubular structure of the rotor 12 with the three guide elements 13 d molded onto the circumference of the rotor inner, which engage in the grooves 32 of the inner column region 33, which is located outside the current coil 23.
  • FIGS. 5a-5e are shown in more detail below.
  • FIG. 5a shows a first embodiment of the coupling element 22 in the form of a clamping ring 21, which in its inner region engages around the valve stem 7 of the gas exchange valve 11 in a force-fitting manner.
  • the outer area of the clamping ring 21, on the other hand, is received by the coupling element 22, for which purpose the coupling element 22 is provided with a hollow cylinder and an annular groove 34 located therein or with a tube section designed as a gripper, in which the clamping ring 21 is fixed.
  • FIG. 5b shows, as a modification of the clamping ring 21 according to FIG. 5a, the engagement of a clamping ring 21 provided with a collar in a groove of the valve stem 7.
  • FIG. 5c discloses a clamping pin 35 which is pressed into a pocket opening of the valve stem 7, the end of the clamping pin 35 being provided with a collar 36 which is encompassed by the housing of the coupling element 22.
  • FIG. 5d the use of a clamping sleeve 37 is proposed in FIG. 5d, which engages with the housing of the coupling element 22 via a collar 36.
  • the clamping sleeve 37 according to FIG. 5d is supplemented by an adjusting device 38, in that an adjusting screw projects through the clamping sleeve 37 into a threaded pocket bore of the valve stem 7, so that the
  • the adjusting screw of the valve stem 7 can be drawn more or less deep into the clamping sleeve 37.
  • connection techniques presented in FIGS. 5a-5e can of course be combined in a variety of ways with force, form and / or material connection variants if desired or required.
  • An easily jointable and separable functional group consisting of the stand 1 with the runner 12, the coupling element 22 and the gas exchange valve 11.
  • a guide of the rotor 12 which is independent of thermally induced changes in geometry, changes in diameter between the rotor 12 and the stander 1 having no influence on the guide. Due to the proposed use of guide elements 13 a-c, the rotor 12 is reliably guided even in a critical air gap area and is braced against the high transverse magnetic forces acting there and against the transverse acceleration forces.
  • the number of guide elements used for this can vary between two and a multiple.
  • the auxiliary spring 26 prevents the valve plate from touching the piston of the internal combustion engine and being destroyed in the process.
  • the proposed invention thus ensures:
  • the proposed invention is not limited to the exemplary embodiments explained, but rather offers a wide range of possible uses, regardless of whether the magnetic rotor 12 is part of a linear motor, a magnetic drive in the form of one or more serially arranged electromagnets or a piezo drive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)
  • Valve Device For Special Equipments (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Electromagnets (AREA)

Abstract

L'invention concerne un mécanisme de commande destiné à une soupape de changement des gaz (11) dans un moteur ou une machine motrice. Ce mécanisme de commande comprend un rotor (12) magnétique dont une section, de préférence cylindrique et creuse éloignée de la soupape de changement des gaz (11), s'étend de façon mobile longitudinalement à l'intérieur d'un stator (1) pourvu d'une bobine d'intensité (23), de telle sorte qu'une extrémité du rotor (12) faisant saillie par rapport au stator (1) actionne la soupape de changement des gaz (11) lorsque la bobine d'intensité (23) est excitée. Le rotor (12) forme avec le stator (1) un module actionnable indépendamment et dont le bon fonctionnement peut être de préférence contrôlé préalablement, ce module étant relié de façon détachable à la soupape de changement des gaz (11).
EP04724022A 2003-05-26 2004-03-29 Mecanisme de commande pour soupape de changement des gaz Withdrawn EP1636465A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10323657 2003-05-26
DE10341698A DE10341698A1 (de) 2003-05-26 2003-09-10 Ventilantrieb für ein Gaswechselventil
PCT/EP2004/050387 WO2004104380A1 (fr) 2003-05-26 2004-03-29 Mecanisme de commande pour soupape de changement des gaz

Publications (1)

Publication Number Publication Date
EP1636465A1 true EP1636465A1 (fr) 2006-03-22

Family

ID=33477520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04724022A Withdrawn EP1636465A1 (fr) 2003-05-26 2004-03-29 Mecanisme de commande pour soupape de changement des gaz

Country Status (4)

Country Link
US (1) US20060231783A1 (fr)
EP (1) EP1636465A1 (fr)
JP (1) JP4594311B2 (fr)
WO (1) WO2004104380A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7557472B2 (en) * 2003-06-26 2009-07-07 Continental Teves Ag & Co. Ohg Valve drive for a gas exchange valve
DE102005017482B4 (de) * 2005-04-15 2007-05-03 Compact Dynamics Gmbh Gaswechselventilaktor für einen ventilgesteuerten Verbrennungsmotor
DE102006013099A1 (de) * 2005-08-25 2007-03-22 Lsp Innovative Automotive Systems Gmbh Rotor eines elektromotorischen Ventilantriebs
FR3000535B1 (fr) * 2013-01-02 2015-12-18 Peugeot Citroen Automobiles Sa Dispositif de fixation d'une queue de soupape a un actionneur

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See references of WO2004104380A1 *

Also Published As

Publication number Publication date
JP2007511693A (ja) 2007-05-10
WO2004104380A1 (fr) 2004-12-02
JP4594311B2 (ja) 2010-12-08
US20060231783A1 (en) 2006-10-19

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