EP1812693B1 - Dispositif et procede pour reguler la levee d'une soupape d'echange gazeux d'echappement d'un moteur a combustion interne - Google Patents
Dispositif et procede pour reguler la levee d'une soupape d'echange gazeux d'echappement d'un moteur a combustion interne Download PDFInfo
- Publication number
- EP1812693B1 EP1812693B1 EP05803031A EP05803031A EP1812693B1 EP 1812693 B1 EP1812693 B1 EP 1812693B1 EP 05803031 A EP05803031 A EP 05803031A EP 05803031 A EP05803031 A EP 05803031A EP 1812693 B1 EP1812693 B1 EP 1812693B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electric motor
- gas exchange
- function
- time
- rotor
- 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.)
- Not-in-force
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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
- 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
- F01L9/22—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by rotary motors
Definitions
- the present invention relates to an apparatus and a method for controlling the Hubverlaufes an exhaust gas exchange valve of an internal combustion engine according to the preamble of the independent claims.
- the camshaft is mechanically driven via a timing chain or timing belt from the crankshaft.
- a so-called electromagnetic valve train for example, a so-called electromagnetic valve train.
- an "actuator unit” is assigned to each valve or "valve group" of a cylinder.
- a valve or a valve group is associated with an opening and a closing magnet.
- valves 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.
- a Drehaktuatorvorraum for stroke control of a gas exchange valve described.
- the stroke control takes place here via a map-controlled electric motor, to whose rotor a shaft is arranged with a rotatably connected control cam.
- the motor oscillates or reciprocates and the control cam periodically presses the gas exchange valve into its open position via a pivoting lever.
- the gas exchange valve is closed by the spring force of a valve spring. So that the electric motor does not have to overcome the entire spring force of the valve spring when opening the gas exchange valve, an additional spring is attached to the shaft.
- 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 is stored either in the valve spring or in the additional spring.
- a similar device is in the US-A-5,873,335 described.
- a development of a Drehaktuatorvortechnische according to the DE 101 40 461 A1 is in the DE 102 52 991 A1 described.
- the existing Drehaktuatorvoruze is extended here by a second actuator (second control cam) in the opposite direction with a smaller stroke compared to the main cam.
- This second actuator does not open the valve completely and is only for small Strokes used in low engine speeds.
- the Drehaktuatorvortechnisch is energized such that the shaft pivots only in the direction of the second actuating element, while at high speeds is pivoted exclusively in the direction of the first actuating element. Due to the small stroke, the rotary actuator device advantageously consumes less power at low speeds.
- the object of the invention is to provide a device for controlling the Hubverlaufes an exhaust gas exchange valve, which ensures an improvement in terms of electrical energy consumption of an actuator.
- the opening operation of the outlet valve takes place to the desired extent in each operating state.
- the object is achieved by the entirety of the features of claim 1.
- at least two set paths are provided for controlling the speed of the rotor of an electric motor driving an exhaust gas exchange valve.
- the nominal paths differ in that they generate different high kinetic energies due to their design and the associated acceleration of the rotor during the valve opening operation and transmitted via the actuator connected to the rotor to the outlet gas exchange valve.
- At least one first setpoint path is provided for generating and transmitting a lower kinetic energy, wherein the setpoint path is used when, for example, due to a smaller current load or load requirement (load within a predetermined load range of lower load) a smaller gas back pressure prevails in the combustion chamber.
- at least one second desired path is provided, which is the generation and transmission of a compared to Kinetic energy of the first setpoint path generates and transmits increased kinetic energy.
- the kinetic energy component is generated by using a second setpoint path, the rotor angular velocity - at least in the Wegphase to the vertex of the stroke curve of the outlet gas exchange valve (in particular a predetermined period before the start of the valve movement, ie during the so-called freewheeling phase of the actuating element) - during the opening process is increased in comparison with the rotor angular velocity (in the same path phase or in the same time period) in regulation according to the first nominal path.
- the second desired path either from the beginning of the route (of the rotor) (and thus a defined time before the start of the actual valve movement) or from a predetermined time or a certain distance (of the rotor) (also a defined time before the start of the actual valve movement) increases the speed specification for the rotor in comparison to the speed specification according to the first desired path such that in the freewheeling phase of the rotor an increased kinetic energy in comparison with the first desired path is generated.
- the invention preferably finds application in rotary actuator systems with an electric cam drive, in which the cam drive driving the outlet gas exchange valve and driven via the rotor of the electric motor has a freewheeling section.
- the freewheeling section ensures that the rotor, starting from the closing position of the outlet gas exchange valve, in which the rotor with the smallest stroke - in particular the zero stroke predetermined by the cam base circle - acts on the outlet gas exchange valve, for a defined run-up section on the Cam base circle moves. Over the entire path of the Anlaufwegabiteses the cam actuator can be accelerated with the lowest energy consumption by the electric motor and thus generated kinetic energy for transmission to the outlet gas exchange valve.
- FIG. 1 shows the schematic representation of a Drehaktuatorvoriques for driving an exhaust gas exchange valve 2 (hereinafter referred to gas exchange valve) of an internal combustion engine, not shown.
- the essential components of this device are, in particular designed as a servomotor electric motor 4 (drive means), a driven by this, preferably two cams 6a, 6b different strokes camshaft 6 (actuator), one with the camshaft 6 on the one hand and with the gas exchange valve 2 on the other operatively connected rocker arm 8 (transmission element) for transmitting movement of the predetermined by the cam 6a, 6b lifting height on 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, via the camshaft 6 and the drag lever 8, the gas exchange valve 2 acted upon by an opening force and designed as an opening spring second energy storage means 12.
- a servomotor electric motor 4 drive means
- actuator driven by this, preferably two cams 6a, 6b
- the electric motor 4 via a control device 20 according to a nominal path, which maps the ideal swing-out behavior of the spring-mass-spring system regulated.
- this control is done by controlling the rotor profile of the, 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 Target path for controlling the electric motor 4.
- a not shown 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 Ventilendlage E1, which corresponds for example to the closed valve position, in a second Ventilendlage E2, E2 ', for example, a partial (E2': Generalhub) or maximum opened (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 the 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 in such a way that in the maximum end positions R1, R2 of the rotor (oscillation end positions at maximum oscillation stroke) each is in a torque-neutral position, in which the forces occurring are in an equilibrium of forces and in which the rotor without application of an additional Holding force is held.
- 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 torque-neutral position R2, not shown, the gas exchange valve 2 would be opened with its maximum stroke according to the main cam 6b and the gas exchange valve 2 arranged around the closing spring 10 maximum biased 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, torque-neutral position R0 is present when the system assumes a so-called dropped state in which the camshaft 6 occupies a position between the two first torque-neutral positions R1, R2. From the fallen position, the system can be brought out again only by high energy expenditure, in which, for example, by swinging or swinging the rotor, the camshaft 6 is again transferred to one of the two first torque-neutral positions R1, R2 or the camshaft 6 at least up to a partial stroke 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 'into the other end position E2, E2' solely on the basis of the forces stored in the energy storage means 10, 12 without the introduction of additional energy, for example by the electric motor 4.
- FIG. 2a the target specification of a speed profile for the rotor of an electric motor 4 for actuating an outlet gas exchange valve 2 is shown schematically.
- the setpoint path SB1 shown in bold is a setpoint path for controlling the rotor speed on the basis of which is to be controlled when only lower gas back pressures within the combustion chamber during the opening operation of the outlet gas exchange valve 2 are present or expected.
- the second target web SB2, which is not shown in bold, is a target web in the event that increased gas counterpressures are present or to be expected in the combustion chamber, so that this target web has an increased speed specification for the rotor, in particular in the travel range shortly before the actual valve opening movement of the exhaust Gas exchange valve 2, pretends.
- the rotor speed is increased in such a way that by means of the second setpoint path SB2 a kinetic energy E kin_accelerated in comparison is generated and can be transmitted to the outlet gas exchange valve 2.
- the speed specification based on the second setpoint path SB2 can be either over the entire travel range of the rotor and at any time - compared to the first desired course - be increased, or increased only over individual parts of the path range.
- the rotor speed is increased specifically. Both the time period .DELTA.t accelerated and the magnitude of the acceleration are preferably predefined as a function of the respective load request.
- the speed of the rotor in the starting phase of the rotor accordingly lower than in the desired path for a lower or an average load request.
- Essential to the invention is only that the increase in speed has an increase in the kinetic energy result, which ensures that occurring at each operating time Gasumbledrücke can be overcome during the opening process of the outlet gas exchange valve 2.
- a plurality of setpoint paths for controlling the rotor speed are present, wherein each setpoint path is assigned a predetermined load range or a predetermined gas backpressure range.
- additional nominal paths can be generated by interpolation in a region between two adjacent stored nominal paths.
- FIG. 2b in each case shows the rotor angle of the electric motor 4 which adjusts itself due to the regulation of the rotor angular velocity.
- the curve segment shown by dashed lines is the rotor angle profile due to the increased rotor angular velocity. Accordingly, the increased rotor angular velocity leads analogously directly to an increased rotor angle.
- the early increased rotor angle does not lead to an immediate output of the gas exchange valve 2 due to the freewheeling section described above, but allows in the inventive way the construction of an additional kinetic energy E kin_be instructt (by acceleration of moving during the freewheel masses, such as rotor mass and mass of the actuator) Support of the electric motor 4 during the opening operation of the exhaust gas exchange valve 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Characterised By The Charging Evacuation (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Claims (4)
- Dispositif pour réguler la levée d'une soupape d'échange de gaz d'échappement (2) d'un moteur à combustion interne comprenant :- un moteur électrique commandé (4) muni d'un élément d'actionnement (6, 6a, 6b) pour actionner la soupape d'échange de gaz d'échappement (2),- une installation de régulation (20) pour commander le moteur électrique (4), et- deux moyens d'accumulation d'énergie (10, 12) agissant dans des directions opposées sur la soupape d'échange de gaz d'échappement (2),l'installation de régulation (20) commande le moteur électrique (4) selon un chemin de consigne (SB1 ; SB2) enregistré, à l'aide duquel la soupape d'échange de gaz de sortie (2) effectue un basculement dans le sens de l'aller et dans le sens du retour du rotor du moteur électrique (4) entre une première position de fin de course (E1) et une seconde position de fin de course (E2 ; E2') et inversement,
caractérisé en ce que- au moins deux chemins de consigne différents (SB1 ; SB2) sont prévus pour la régulation de la vitesse du rotor du moteur électrique (4), et- la régulation par un chemin de consigne (SB1 ; SB2) au cours de la phase d'ouverture de la soupape, transmet une énergie cinétique plus faible à la soupape d'échange de gaz (2), que la régulation à l'aide de l'autre chemin de consigne (SB2 ; SB1). - Dispositif selon la revendication 1,
caractérisé en ce qu'
il comporte au moins deux chemins de consigne (SB1 ; SB2) auxquels sont associés les mêmes nombres de zones différentes de demande de charge. - Dispositif selon les revendications précédentes,
caractérisé en ce que
l'unité de régulation (20) ou une autre unité de régulation sont réalisées pour qu'au moins un autre chemin de consigne (SBn) et de préférence plusieurs autres chemins de consigne soient générés par interpolation dans la zone de régulation entre deux chemins de consigne voisins (SB 1 ; SB2) enregistrés. - Procédé de régulation de la levée d'une soupape d'échange de gaz d'échappement (2) d'un moteur à combustion interne,
selon lequel
le rotor d'un moteur électrique (4) destiné à assurer l'entraînement d'une soupape d'échange de gaz de sortie (2), est commandé selon un chemin de consigne enregistré (SB1 ; SB2) comme prédéfinition nécessaire de la vitesse du rotor, et
pour la commande du moteur électrique (4), au moins deux chemins de consigne (SB1 ; SB2) régulent la vitesse du moteur électrique (4), et la régulation à l'aide d'un chemin de consigne (SB1) règle une vitesse maximale de rotation plus faible (vmax_SB1) que la régulation à l'aide de l'autre chemin de consigne (SB2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004054775A DE102004054775B4 (de) | 2004-11-12 | 2004-11-12 | Vorrichtung und Verfahren zur Regelung des Hubverlaufes eines Auslass-Gaswechselventils einer Brennkraftmaschine |
PCT/EP2005/011246 WO2006050795A1 (fr) | 2004-11-12 | 2005-10-19 | Dispositif et procede pour reguler la levee d'une soupape d'echange gazeux d'echappement d'un moteur a combustion interne |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1812693A1 EP1812693A1 (fr) | 2007-08-01 |
EP1812693B1 true EP1812693B1 (fr) | 2009-10-07 |
Family
ID=35709014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05803031A Not-in-force EP1812693B1 (fr) | 2004-11-12 | 2005-10-19 | Dispositif et procede pour reguler la levee d'une soupape d'echange gazeux d'echappement d'un moteur a combustion interne |
Country Status (5)
Country | Link |
---|---|
US (1) | US7753015B2 (fr) |
EP (1) | EP1812693B1 (fr) |
AT (1) | ATE445086T1 (fr) |
DE (2) | DE102004054775B4 (fr) |
WO (1) | WO2006050795A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0920152D0 (en) * | 2009-11-18 | 2009-12-30 | Camcon Ltd | Rotary electromagnetic actuator |
EP2336508B1 (fr) * | 2009-12-16 | 2012-07-04 | Iveco Motorenforschung AG | Système d'actionnement de vanne variable mécanique pour les opérations de moteur à deux temps et à quatre temps |
GB2563064B (en) * | 2017-06-02 | 2022-05-18 | Camcon Auto Ltd | Valve actuators |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5327856A (en) * | 1992-12-22 | 1994-07-12 | General Motors Corporation | Method and apparatus for electrically driving engine valves |
US5873335A (en) * | 1998-01-09 | 1999-02-23 | Siemens Automotive Corporation | Engine valve actuation control system |
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 |
-
2004
- 2004-11-12 DE DE102004054775A patent/DE102004054775B4/de not_active Expired - Fee Related
-
2005
- 2005-10-19 WO PCT/EP2005/011246 patent/WO2006050795A1/fr active Application Filing
- 2005-10-19 EP EP05803031A patent/EP1812693B1/fr not_active Not-in-force
- 2005-10-19 DE DE502005008295T patent/DE502005008295D1/de active Active
- 2005-10-19 AT AT05803031T patent/ATE445086T1/de not_active IP Right Cessation
-
2007
- 2007-05-10 US US11/798,163 patent/US7753015B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1812693A1 (fr) | 2007-08-01 |
WO2006050795A1 (fr) | 2006-05-18 |
DE102004054775A1 (de) | 2006-05-24 |
US20070209620A1 (en) | 2007-09-13 |
ATE445086T1 (de) | 2009-10-15 |
US7753015B2 (en) | 2010-07-13 |
DE502005008295D1 (de) | 2009-11-19 |
DE102004054775B4 (de) | 2006-09-21 |
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