EP1812690A1 - Procédé pour étalonner un capteur de trajectoire d'un dispositif d'actionnement rotatif servant à commander une soupape de changement des gaz d'un moteur à combustion interne - Google Patents

Procédé pour étalonner un capteur de trajectoire d'un dispositif d'actionnement rotatif servant à commander une soupape de changement des gaz d'un moteur à combustion interne

Info

Publication number
EP1812690A1
EP1812690A1 EP05857847A EP05857847A EP1812690A1 EP 1812690 A1 EP1812690 A1 EP 1812690A1 EP 05857847 A EP05857847 A EP 05857847A EP 05857847 A EP05857847 A EP 05857847A EP 1812690 A1 EP1812690 A1 EP 1812690A1
Authority
EP
European Patent Office
Prior art keywords
rotor
electric motor
gas exchange
exchange valve
torque
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Withdrawn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
EP05857847A
Other languages
German (de)
English (en)
Inventor
Rudolf Dr. SEETHALER
Martin Lamprecht
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1812690A1 publication Critical patent/EP1812690A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • 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
    • 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
    • F01L2820/032—Electric motors

Definitions

  • the present invention relates to a method for calibrating a displacement sensor of a rotary actuator device for controlling a gas exchange valve of an internal combustion engine according to the preamble of the independent claims.
  • the camshaft for controlling the gas exchange valves is mechanically driven by a timing chain or a timing belt from the crankshaft.
  • a so-called fully variable (variable timing and variable valve lift) for example, a so-called electromagnetic valve train.
  • an "actuator unit” is assigned to each valve or "valve group" of a cylinder.
  • stroke actuators a valve or a valve group is associated with an opening and a closing magnet. By energizing the magnets, the valves can be moved axially, ie opened or closed.
  • a control shaft is provided with a cam, wherein the control shaft is pivotable by an electric motor back and forth.
  • valve spring and additional spring are such that during periodic operation of the rotary actuator device according to the position of the gas exchange valve, the kinetic energy either in the valve spring (closing spring) or in the additional spring (opening spring) is stored.
  • the device described proposes for the unique positioning of the control cam in its end positions, which is clearly positioned by means of a first and by means of a second rotation stop.
  • a disadvantage of this arrangement is that the calibration of position sensors for position determination by starting mechanical attacks not for all applications has a satisfactory accuracy. Depending on the structure of the Drehaktuatorvoriques used, the mechanical tolerances of the system are so large that a required accuracy can not be achieved.
  • the object of the invention is to provide a method for calibrating a displacement sensor for a Drehaktuatorvoriques, by means of which a more accurate positioning or position determination of the actuating element (and thus also of the gas exchange valve) is ensured.
  • a rotary actuator in a rotary actuator according to the preamble of claim 1 starting from a metastable end position of the actuating element (here: camshaft) or starting from a metastable end position of the rotor of the electric motor of the electric motor driven such that the rotor to moves a distance in at least one direction out of its moment-neutral position and the resulting current consumption is detected.
  • the displacement sensor for determining the rotor position or the position of the actuating element is neutral to a new, possibly corrected, torque Position (which ideally can be the same as the old position, or only slightly deviates from it) (calibrated).
  • the rotor is deflected on both sides on the basis of a metastable torque-neutral position, the current consumption of the electric motor is observed, and the displacement sensor is adjusted to a corrected position, in particular to an adjusted metastable torque-neutral position.
  • the actual moment zero point can be determined at the self-adjusting current values (proportional to the restoring moment of the restoring torque acting on the rotor due to the respective tensioned opening or closing spring).
  • the gas exchange valve is deliberately transferred to a torque-neutral center position, which in turn forms a unique reference point for the adjustment of the displacement sensor.
  • This torque-neutral central position is in contrast to the above-described metastable end positions at full lift a stable position (so-called tapered or fallen position of the rotor) from the rotor can not be led out by a minimum impulse-like abutting energy. From this stable position, the rotor can be converted by a targeted arrival or swinging again in a General ⁇ or Vollhub compassion.
  • This position corresponds to the position when the rotor uncontrollably slides off a metastable end position in full stroke and is therefore not desirable in normal operation. However, especially when starting a motor vehicle, there is sufficient time to carry out a calibration based on this procedure and then to swing the rotor back into a normal operating position. Further advantageous features of the invention are described in the dependent claims.
  • Figure 1 the schematic representation of a Drehaktuatorvorraum for driving a gas exchange valve of an internal combustion engine, not shown, and
  • Figure 2 the torque curve of opening and closing spring of a rotary actuator, which acts on the inlet side on a gas exchange valve and the adjusting stroke profile of the actuated gas exchange valve - shown schematically in a diagram.
  • FIG. 1 shows the schematic representation of a rotary actuator for driving a gas exchange valve 2 of an internal combustion engine, not shown.
  • the essential components of this device are an especially designed as a servomotor electric motor 4 (drive means), a driven by this, preferably two cams 6a, 6b different strokes and rotatably connected to the rotor shaft camshaft 6 (actuator), one with the camshaft 6 on the one hand and with the gas exchange valve 2 on the other hand in operative connection drag lever 8 (transmission element) for transmitting the movement of the given by the cam 6a, 6b lifting height to the gas exchange valve 2 and one, the gas exchange valve 2 in the closing direction with a spring force acting and designed as a closing spring first energy storage means 10 and a , via the camshaft 6 and the drag lever 8, the gas exchange valve 2 with an opening force acting on and designed as an opening spring second Energy storage means 12.
  • drive means drive means
  • a driven by this preferably two cams 6a, 6b different strokes and rotatably connected to
  • control device In order to ensure the lowest possible operation of the electric motor 4, which drives the existing gas exchange valve 2 via the camshaft 6, in addition to the optimal design of the counteracting springs (closing spring 10, opening spring 12) and the ideal positioning of rotation and articulation points in the Geometry of the device itself, the electric motor 4 via a control and regulating device 20 (hereinafter referred to as control device) according to a nominal path, which maps the ideal swing-out behavior of the spring-mass-spring system regulated. In particular, this control is done by controlling the rotor profile of the, at least one actuator 6, 6a, 6b driving electric motor 4.
  • the ideal path of the rotor, which resonates as part of the vibration system is calculated analogously to the ideal waveform of the overall system and forms the desired path to Regulation of the electric motor 4.
  • a non-illustrated displacement sensor is present, which transmits a sensor signal S to the control device 20 or another control device.
  • the electric motor 4 is controlled by the control device 20 such that the at least one gas exchange valve 2 from a first valve end position E1, which corresponds for example to the closed valve position, in a second valve end position E2, E2 ⁇ for example, a partial (E2 1 : partial stroke) or maximum open (E2: full stroke) valve position corresponds, is transferred and vice versa.
  • the system is ideally designed so that the actuator 6, 6a, 6b in the exclusion (targeted disregard) of environmental influences (in particular friction and gas back pressure) the way between two end positions R1 - R2 (full stroke) or R1 '- R2' (partial stroke) without Infeed additional energy, ie without active drive by the drive device 4, travels and thus engages supportive only in the environmental conditions occurring in practice.
  • the system is preferably designed such that it is in the maximum end positions R1, R2 of the rotor (vibration end positions at maximum vibration) each in a metastable torque neutral position in which the forces are in an equilibrium of forces and in which the rotor without applying a additional holding force is held.
  • the gas exchange valve 2 in the first metastable and torque-neutral position R1 (shown in Figure 1) the gas exchange valve 2 is closed and thus the closing spring 10 while maintaining a residual preload maximum relaxed, while the opening spring 12 is biased to the maximum.
  • the force of the prestressed opening spring 12 is transmitted to the camshaft 6 via a stationary support element 6c and is directed in the position R1 exactly through the center of the camshaft 6 and thus virtually neutralized.
  • the existing due to the residual bias force of the closing spring 10 is neutralized in the described position, as this is also directed via the cam followers 8 in the center of the camshaft 6.
  • the gas exchange valve 2 In the second metastable and moment-neutral position R2, which is not shown, the gas exchange valve 2 would be in accordance with its maximum stroke opened to the main cam 6b and the maximum arranged around the gas exchange valve 2 around closing spring 10, while the opening spring 12 would be maximally relaxed while maintaining a residual bias.
  • the arrangement of the individual components is chosen such that again the force of the maximum prestressed spring means (now: closing spring 10) and the maximum relaxed spring means (now: opening spring 12) respectively directed through the center of the camshaft 6 and thus virtually neutralized in this position are.
  • a third, also not shown, stable and torque-neutral position RO is present when the system assumes a so-called dropped state in which the camshaft 6 assumes a position between the two first torque-neutral positions R1, R2. From the fallen position, the system can be brought out again only by means of a high energy expenditure, in which, for example, by swinging or swinging the rotor, the camshaft 6 is again transferred to one of the first two metastable torque-neutral positions R1, R2 or the camshaft 6 at least up to a partial lift is swung, in which a regular operation of the rotary actuator device is possible again.
  • the rotor thus oscillates from one end position E1, E1 'to the other end position E2, E2' alone due to the stored energy in the means 10, 12 forces without feeding an additional energy, such as by the electric motor. 4
  • the control device 20 activates the electric motor 4 exclusively to compensate for the frictional losses and the occurring gas counterpressures which are always present in practice. Since friction losses occur mainly at high rotor speeds, the electric motor 4 must deliver the highest power at high speeds. Since this coincides with the energy-optimal operating point of the electric motor 4, an energy-saving operation of the same can be ensured by the scheme based on idealized set paths of the actuator system to be operated.
  • the first metastable and torque-neutral position R1 of the rotor or of the actuating element 6, 6a, 6b, during the closed state of the gas exchange valve 2 at full stroke, is located in the point P1 to the point in time when the opening spring curve K M _ö ff-voltage fede r and When the curve of the opening spring curve K M _opening spring intersects, the closing spring curve KM SchHeßfed e r cuts positively.
  • the second metastable and torque-neutral position R2 of the rotor or of the actuating element 6, 6a, 6b during the opening process of the gas exchange valve 2 at full stroke adjusts itself at the point P2 at the time when the ⁇ réellesfederkurve KM_ö Stammsfeder and the Schinnefederkurve KM_schi tellfeder with decreasing curve of the opening spring curve KM_ö Stammsfeder and also sloping curve of the closing spring curve KM_schi tellfeder cut.
  • the stable intermediate position RO described above (also called fallen or toschwonne position) is then present when opening spring curve K M ö ff voltage sfede r and closing spring curve KM_schiie ß spring then cut it when the opening spring curve K M _ö Stammsfeder during their falling waveform, the rising closing spring curve KM_schiie ßf eder cuts.
  • the torque curves shown are proportional to the respective resulting restoring moment of the spring forces and thus proportional to the current consumption of the electric motor 4.
  • a metastable End position R1 or R2 into which the rotor or the rotationally fixedly connected actuating element 6, 6a, 6b is transferred on the basis of a predetermined control time using the measuring signal of the displacement sensor is checked at certain intervals whether the measuring signal of the displacement sensor is correct.
  • the opening spring or closing spring 12, 10 tries to accelerate the rotor shaft by means of the stored spring force when the rotor shaft moves away from the respective end position during full stroke.
  • the calibration of the displacement sensor takes place in that the rotor is controlled by selective control of the electric motor 4 via the control device 20 or another control or control unit in a between the two metastable torque-neutral positions or end positions (R1, R2; E2) located torque-neutral stable intermediate position RO is transferred and the assumed intermediate position RO serves as NuIIab Eisen (or as a calibration point) for the calibration of the displacement sensor.
  • this displacement sensor calibration is only suitable for calibration during (low) speeds of the engine to be controlled in which a sufficient residence time of the rotor is guaranteed in the end positions R1, R2, since only during the Dwell time of the rotor in the moment-neutral end positions R1, R2, the rotor can be moved as described for the purpose of calibration. At high speeds, the rotor usually does not reach the torque-neutral end positions, so that such a calibration is not possible here. A movement or process of the rotor in the intermediate position is not required, since this position, in contrast to the metastable positions R1, R2 is unambiguously defined and thus checked directly based on the assumed stable center position RO position sensor and possibly corrected ,
  • the error detection is carried out in a simple manner by the distances or rotor angle ranges between the torque-neutral positions R1, R2, RO or between a fixed reference point and one or more of the torque-neutral positions with a reference distance or reference angle range is compared and in deviation by a predetermined value an error signal is generated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

L'invention concerne un procédé pour étalonner un capteur de trajectoire d'un dispositif d'actionnement rotatif servant à commander une soupape de changement des gaz d'un moteur à combustion interne. Le dispositif d'actionnement rotatif comprend : un moteur électrique commandable qui comporte un élément d'actionnement servant à actionner la soupape de changement de gaz ; deux éléments de stockage d'énergie qui agissent sur la soupape de changement des gaz dans des directions de commande opposées, et ; une unité de commande qui sert à commander le moteur électrique. Cette unité de commande commande le moteur électrique de manière que la soupape de changement des gaz passe d'une première position extrême dans laquelle l'élément d'actionnement commandé par l'intermédiaire du rotor du moteur électrique, ainsi que le rotor se trouvent dans une position métastable momentanément neutre qui est associée à ladite première position extrême, à une deuxième position extrême dans laquelle l'élément d'actionnement (6, 6a, 6b) ou le rotor se trouve dans une position métastable momentanément neutre qui est associée à ladite deuxième position extrême, et vice versa. Selon l'invention : le moteur électrique est commandé à partir d'une position momentanément neutre, de manière que le rotor soit déplacé de la position momentanément neutre, d'une certaine distance, dans au moins une direction ; la consommation de courant résultante du moteur électrique est détectée, et ; une nouvelle position du rotor est déterminée, en fonction des valeurs de consommation de courant détectées du moteur électrique, pour étalonner le capteur de trajectoire.
EP05857847A 2004-11-12 2005-10-19 Procédé pour étalonner un capteur de trajectoire d'un dispositif d'actionnement rotatif servant à commander une soupape de changement des gaz d'un moteur à combustion interne Withdrawn EP1812690A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004054776A DE102004054776B3 (de) 2004-11-12 2004-11-12 Verfahren zur Kalibrierung eines Wegsensors einer Drehaktuatorvorrichtung zur Ansteuerung eines Gaswechselventils einer Brennkraftmaschine
PCT/EP2005/011247 WO2006050796A1 (fr) 2004-11-12 2005-10-19 Procédé pour étalonner un capteur de trajectoire d'un dispositif d'actionnement rotatif servant à commander une soupape de changement des gaz d'un moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP1812690A1 true EP1812690A1 (fr) 2007-08-01

Family

ID=35695593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05857847A Withdrawn EP1812690A1 (fr) 2004-11-12 2005-10-19 Procédé pour étalonner un capteur de trajectoire d'un dispositif d'actionnement rotatif servant à commander une soupape de changement des gaz d'un moteur à combustion interne

Country Status (4)

Country Link
US (1) US7516642B2 (fr)
EP (1) EP1812690A1 (fr)
DE (1) DE102004054776B3 (fr)
WO (1) WO2006050796A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5838681B2 (ja) * 2011-09-16 2016-01-06 いすゞ自動車株式会社 アクチュエータの制御方法及びアクチュエータの制御装置
CN104107997B (zh) * 2013-04-16 2016-04-20 吉林经济技术开发区城发集塑管业股份有限公司 钢带增强螺旋波纹管生产中的钢带焊接平台
US9476363B2 (en) 2015-01-08 2016-10-25 Solar Turbines Incorporated Actuator to valve calibration of a fuel control valve assembly
CN107509394B (zh) * 2015-04-06 2021-04-09 三菱电机株式会社 致动器的控制装置、阀驱动装置及致动器的异常检测方法
CN108303058B (zh) * 2017-12-20 2020-05-26 深圳市英威腾电动汽车驱动技术有限公司 一种电动汽车传动轴间隙测量的方法和系统
CN113075565B (zh) * 2021-03-29 2022-12-13 潍柴动力股份有限公司 电池耐久测试工况设计方法、装置及电池耐久测试方法

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DE19739840C2 (de) * 1997-09-11 2002-11-28 Daimler Chrysler Ag Verfahren zur Steuerung einer elektromagnetisch betätigbaren Stellvorrichtung, insbesondere eines Ventils für Brennkraftmaschinen
DE19913050A1 (de) * 1999-03-23 2000-09-28 Fev Motorentech Gmbh Verfahren zur Erfassung der Position und/oder Bewegungsgeschwindigkeit eines zwischen zwei Schaltstellungen hin und her bewegbaren Stellelements
DE10220199A1 (de) * 2001-05-14 2002-12-12 Heinz Leiber Elektromagnetische Stelleinrichtung
DE10140461A1 (de) * 2001-08-17 2003-02-27 Bayerische Motoren Werke Ag Drehaktor-Vorrichtung zur Hubsteuerung eines Gaswechselventils im Zylinderkopf einer Brennkraftmaschine
DE10252991A1 (de) * 2002-11-14 2004-05-27 Bayerische Motoren Werke Ag Schwenkaktor-Vorrichtung zur Hubsteuerung eines Gaswechselventils im Zylinderkopf einer Brennkraftmaschine
DE102004054759B4 (de) * 2004-11-12 2006-08-10 Bayerische Motoren Werke Ag Verfahren zur Kalibrierung eines Wegsensors einer Drehaktuatorvorrichtung zur Ansteuerung eines Gaswechselventils einer Brennkraftmaschine

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Also Published As

Publication number Publication date
DE102004054776B3 (de) 2006-03-16
US20070208488A1 (en) 2007-09-06
US7516642B2 (en) 2009-04-14
WO2006050796A1 (fr) 2006-05-18

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