EP1171702B1 - Circuit destine a la commande au moins d'une soupape d'admission et d'evacuation d'un moteur a combustion interne, respectivement actionnee par voie electromecanique - Google Patents

Circuit destine a la commande au moins d'une soupape d'admission et d'evacuation d'un moteur a combustion interne, respectivement actionnee par voie electromecanique Download PDF

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Publication number
EP1171702B1
EP1171702B1 EP00936636A EP00936636A EP1171702B1 EP 1171702 B1 EP1171702 B1 EP 1171702B1 EP 00936636 A EP00936636 A EP 00936636A EP 00936636 A EP00936636 A EP 00936636A EP 1171702 B1 EP1171702 B1 EP 1171702B1
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EP
European Patent Office
Prior art keywords
valves
placement
control
circuit
arrangement according
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.)
Expired - Lifetime
Application number
EP00936636A
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German (de)
English (en)
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EP1171702A1 (fr
Inventor
Volker Eichenseher
Andreas Hartke
Thomas Vogt
Markus Teiner
Achim Koch
Frank Queisser
Wolfgang Menzel
Thomas Seidenfuss
Karl-Heinz Ebeling
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
Continental Automotive GmbH
Original Assignee
Bayerische Motoren Werke AG
Siemens AG
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Application filed by Bayerische Motoren Werke AG, Siemens AG filed Critical Bayerische Motoren Werke AG
Publication of EP1171702A1 publication Critical patent/EP1171702A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • 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
    • F01L2009/2167—Sensing means
    • F01L2009/2169—Position sensors
    • 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
    • F01L2201/00—Electronic control systems; Apparatus or methods therefor
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • F02D2041/001—Controlling intake air for engines with variable valve actuation

Definitions

  • the invention relates to a circuit for control at least of an electromechanically operated input and Exhaust valve of an internal combustion engine.
  • Electromechanical actuators for Gas exchange valves are for example from DE 297 12 502 U1 or EP 0 724 067 A1. You assign one between one closed and an open position rest position from which they are deflected by means of electromagnets can.
  • the respective Winding energized, with the required current in the capture phase is greater than in the holding phase, in which the valve is in an end position is held.
  • the corresponding electromagnet is simply powered pressurized, the valve disc hits at high speed on the valve seat, which is noise-generating and wear-promoting is. To avoid this, the impact speed should be be be reduced. For this purpose, mechanical stop damping examined.
  • the current supply is advantageously suitably regulated, which, however, requires a relatively complex control algorithm since this regulation must be done in real time. For example is to regulate the impact speed available time span only a few milliseconds.
  • EP 0 724 067 A1 discloses a control system for electromagnetic operated valves.
  • the control system has a CPU as well an energization timing control circuit.
  • This energization timing control circuit supplies the electromagnets via power amplifiers of a valve.
  • the CPU sets the opening and Closing times of the valve determines and provides a corresponding Counter read out by the energization timing control circuit becomes.
  • EP 0 724 067 A1 thus discloses a separation between control of the electromagnets and specification of Time control, which is done by the CPU. Any Attachment control for low-noise, gentle attachment of the valves in the end positions is not in EP 0 724 067 A1 mentioned.
  • EP 0 376 716 A1 describes a valve control with which a Avoid placing the valves too hard.
  • the control device disclosed here for an electromagnetic actuated gas exchange valve has a control unit that contains an EPU and an input / output interface.
  • the proposed touchdown control is implemented directly by the CPU.
  • JP 61076713 The Japanese patent abstract for JP 61076713 is based on that Problem of the touchdown regulation by for the gentle touchdown is suggested just before touchdown in a End position a short, exerting a counterforce on the anchor To energize the electromagnets.
  • the for Execution of this method has circuit described a CPU and connected to the CPU via a multiplexer Driver circuits for the electromagnetic valves.
  • the invention is based on the knowledge that the regulation the impact speed from the communication with the operating control unit and the generation of a timing signal be separated from the specifications of the operating control unit should.
  • the communication computer carries out communication preferably via a CAN bus by the operating control device of the internal combustion engine and generated from the crankshaft signal also supplied and the timing signals for the touchdown controller. These timing signals are each usually a digital signal where the rising Flank a valve opening and the falling flank a valve closing instructs.
  • each Cylinder will have its own time control signal Lift controller in unidirectional communication fed to.
  • there can also be a separate one for each coil Timing signal can be provided for greater freedom when Actuate the coils to get.
  • the communication computer evaluates the crankshaft signal, communication with the operating control device of the internal combustion engine and depends on the operating control unit received data the timing signals for the touchdown controller generated, the latter are used for the rule application kept free and the regulation is not used by other (communication) Tasks interrupted.
  • the tasks can continue touchdown control by using multiple touchdown controls can be parallelized, making one control algorithm less fails time-critical. Because with the communication computer a central communication and time control unit there is only one communication partner for other control units and there are no misalignments of the individual slip-on regulators and therefore the electromechanical one actuated gas exchange valves possible. Because advantageously the touchdown controllers work digitally and with the communication computer also via a serial interface are connected and via these the states of the electromechanical actuated gas exchange valves to the communication computer report, all states are known and available centrally.
  • the communication computer can instruct to shut down the other two valves of the cylinder, i.e. to drive into the closed position. Then can the internal combustion engine in an emergency mode without this cylinder run without unburned fuel in the exhaust system or combustion gases would get into the intake tract.
  • the provision of several touchdown regulators further enables one mutual monitoring of all used in the circuit Processors, in particular that of the communications computer and that of the touchdown controller.
  • the coils are electromechanical Gas exchange valves from the touchdown regulators AND gate controlled, the second input with the Time control signal sent from the communications computer to the touchdown controller delivers, can be controlled if the touchdown controller this unlocked by a corresponding locking member Has.
  • the circuit of FIG. 1 is used to control electromechanically driven gas exchange valves 5a, 5b, 6a, 6b.
  • electromechanically driven gas exchange valves 5a, 5b, 6a, 6b On is such an electromechanically driven gas exchange valve for example in German utility model 297 12 502 U1 described.
  • the electromechanically operated gas exchange valve is actuated by energizing two coils, one coil for closing, the other for opening of the gas exchange valve is responsible.
  • the respective coil is energized with a holding current.
  • To the gas exchange valve in the open or closed position bring the required coil with Current is applied, the current being greater in a catching phase is than in the subsequent hold phase.
  • Fig. 1 is the circuit for a 4-cylinder internal combustion engine schematically shown, however, this number of cylinders to be understood only as an example.
  • a cylinder has in In this example, two inlet valves 5a, 5b and two outlet valves 6a, 6b.
  • For the intake and exhaust valves 5a, 5b or 6a, 6b is a respective landing regulator 2 or 3 intended.
  • the placement controller 2, 3 controls output stages that the energization of the respective coils of the gas exchange valve 5a, 5b, 6a, 6b.
  • each coil has its own power amplifier.
  • the touchdown controller 2, 3 and the output stages are housed in one housing, connected to the cooling circuit of the internal combustion engine is to ensure even heat dissipation.
  • the placement controller 2, 3 controls the output stages of a valve 5, 6 depending on a timing signal TS indicating that when to open or close the valve.
  • a timing signal TS indicating that when to open or close the valve.
  • TS Time control signal
  • the time control signal TS is, for example, a square wave signal, where the falling flank is the closing and the rising Edge indicates the opening of the associated valve. It is the touchdown controller 2, 3 via a unidirectional communication line 4 supplied by a communication computer 1, which will be described later.
  • the touchdown controller 2, 3 has a digital processor that is energized regulates the coils through the output stages so that the valve 5a, 5b, 6a, 6b gently touches down in the desired end position. Usually to move the valve from an end position to the to bring others to energize the coil of the one to be left End position switched off and energization of the winding of the electromagnet for the new end position switched on.
  • the current is from the processor of the touchdown controller 2, 3 regulated so that the valve gently in the new end position touches down.
  • Each valve used for this regulation the touchdown controller 2, 3 a position signal that provides information about the position of the respective valve 5a, 5b, 6a, 6b. to Generation of the position signals is each electromechanical actuated valve 5a, 5b, 6a, 6b with a suitable position sensor provided, such as in the German Application 197 53 275 or DE 195 18 056 A1 described is.
  • the regulation of the coil current for catching the valve 5a, 5b, 6a, 6b is, for example, in principle in DE 195 26 683 A1 described.
  • the top-up controller measures the actual current the coil and outputs the TARGET value to the output stage.
  • a different size can be used, which expresses the actuation of the actuator, e.g. the Driver voltage of the output stage.
  • the touchdown controller 2, 3 also leads to the regulation of Winding energization still a plausibility check of the signals through, i.e. the position signal and the coil energization. From the latter, as known from DE 195 26 683 A1 is to be derived from another signal that statements about the position of the corresponding gas exchange valve 5a, 5b, 6a, 6b enables the position signal by means of this further signal can be checked.
  • the top-up controller 2, 3 is via a further, serial SPI-BUS Interface connected to the communication computer 1 and reports the state of the valves 5a, 5b, 6a, 6b or one possible valve failure via this interface.
  • the communication computer 1 is connected to a CAN bus 8 and uses it to communicate with the operating control unit 9 of the internal combustion engine.
  • Such BUS connection is, for example, in W. Lawrenz, CAN controller Area Network, Weghig Verlag, 1994, ISBN 3-7785-2263-7 described.
  • the communication computer 1 is advantageously housed in the same cooled housing as that Lift controller 2, 3 and the output stages. He continues to get that Crankshaft signal and calculated from it together with the requirements the operating control unit the timing signals TS for touchdown controllers 2, 3 and passes them over the unidirectional Communication lines 4 to touchdown controllers 2, 3 out. It also communicates with the via the SPI-BUS 7 Touchdown controllers 2, 3 and exchange the status information or error information.
  • the communications computer also monitors 1 the entire electromechanical valve train, i.e. the temperature of the final stages for the gas exchange valves 5a, 5b, 6a, 6b, the supply voltage of these output stages (usually 42 V), the supply voltage of the position sensors (usually 15 V) and the supply voltage of the Lift controller 2, 3 (usually 3.3 V).
  • a touchdown controller for example touchdown controller 2 the intake valves 5a, 5b of cylinder number 1 fail either one of the output stages or one of the valves 5a, 5b or other damage via the SPI-BUS 7 to the communication computer 1, this causes the other touchdown controller this cylinder, in this example the touchdown controller 3, the other gas exchange valves of the cylinder concerned, in in this case, the exhaust valves 6a, 6b, in the closed position shut down.
  • FIG. 2 shows an exemplary drive connection between a placement controller 3 and the valves 6a, 6b shown in more detail.
  • the closer coils 11a, 11b of the gas exchange valves 6a, 6b are with the power stages integrated in the top-up controller 2, 3 connected via an AND gate 16a, 16b.
  • the AND gates 16a, 16b can also be used to control the Power amplifiers can be provided.
  • the second input of the AND gates 16a, 16b is connected to a branch 12 via an inverter 14 the communication line 4 connected for the time control signal TS, that the communication computer 1 the touchdown controller 3 feeds.
  • an AND gate 13 is also connected, whose second input is controlled by the touch-up controller 3 becomes.
  • the opening coils 10a, 10b of the gas exchange valves are similar 6a, 6b via AND gates 15a, 15b to the output of the AND gate 13 connected, here no inverter 14 is provided.
  • This circuit works as follows: switches the touchdown controller 3 via a suitable high-level signal AND gate 13 free, so the timing signal is at its output TS on how it from the communication computer 1 via the Communication line 4 to the top controller 3 for the valves 6a, 6b is supplied.
  • a falling edge of this timing signal TS is shown in Fig. 3, it has a closing of the exhaust valves 6a, 6b.
  • the touchdown controller 3 recognizes the falling edge of the timing signal TS, it normally takes a certain time offset t (see FIG. 3) until the energization the respective winding, in this case the windings 10 of the closer coils is ended.
  • This time offset t is due to program run times in the processor of the touchdown controller 3 and due to time constants of the control.
  • FIG. 3 which resulting time course of the energization of the windings 10 is shown in FIG. 3 with curve 20. Now has the touchdown controller 3 unlocked the AND gate 13, causes falling edge of the timing control signal TS via the AND gates 15 a premature end of the energization of the opening coils. It results schematically on the windings 10 of FIG Current curve shown in curve 21. As in Fig. 3 too can be seen, the energization then ends without the time offset t.
  • This training enables the touchdown controller 3 over the AND gate 13 is a direct effect of the timing signal TS on the energization of the windings 10, 11 allows.
  • the communication computer 1 can therefore touchdown controller 3 Instruct the SPI-BUS 7 depending on the operating state, this directly Enabling access to the time control signal TS.
  • the inverter 14 in the wiring of the second inputs the AND gates 16 for the windings 11 of the closer coils this results in an inverse behavior to the opening coils and there is simultaneous energization of the windings 11 of the NO coils activated.
  • the touchdown controller 3 can Then initiate energization of the make coils in a suitable manner.
  • the control described can be applied to all touchdown controllers 2, 3 may be provided.
  • inlet valves 5a, 5b and Exhaust valves 6a, 6b of each cylinder independent touchdown 2, 3 provided, but there is also a different division possible, in particular a single touchdown controller meet the requirements.
  • at least one further communication computer can be provided, for example, for all Inlet valves 5 and all exhaust valves 6 of the internal combustion engine a separate communication computer can be provided. This structure gives you a certain amount of redundancy, since at Failure of one of the communication computers the other the tasks the failed can take over.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

L'invention concerne un circuit destiné à la commande de soupapes d'échange gazeux (5, 6) actionnées par voie électromécanique. Ce circuit comprend des régulateurs de positionnement (2, 3) qui commandent la position finale des soupapes d'échange gazeux (5, 6) actionnées par voie électromécanique et amènent doucement les soupapes d'échange gazeux (5, 6) dans leur position finale respective. Un calculateur de communication numérique (1) permet de prédéterminer les signaux de synchronisation des régulateurs de positionnement (2, 3) aux fins de communication avec l'appareil de commande de fonctionnement (9) du moteur à combustion interne. Les régulateurs de positionnement (2, 3) étant ainsi soulagés de toute opération de communication, ils peuvent se consacrer à la régulation de positionnement en temps réel.

Claims (11)

  1. Dispositif de commande comprenant un circuit de commande d'au moins une
       soupape d'admission (5) actionnée électro-mécaniquement et d'au moins une soupape d'échappement (6) actionnée électro-mécaniquement d'un cylindre d'un moteur à combustion interne, avec au moins un régulateur d'arrivée de soupape (2, 3) avec au moins un étage de sortie pour chaque électro-aimant des soupapes (5, 6) actionnées électro-mécaniquement, qui commande les étages de sortie des soupapes (5, 6) en fonction de signaux de distribution et règle l'alimentation des électro-aimants en traitant des signaux de position signalant la position des soupapes (5, 6), pour produire une arrivée des soupapes (5, 6) douce et silencieuse dans leur position finale, et
       un ordinateur de communication (1) travaillant de façon numérique qui exploite un signal de position de vilebrequin, qui échange des données avec une unité de commande de fonctionnement (9) du moteur à combustion interne par l'intermédiaire d'une connexion de communication (8) et qui produit les signaux de distribution pour le régulateur d'arrivée de soupape (2, 3) en fonction du signal de position de vilebrequin et des données obtenues à partir de l'unité de commande de fonctionnement (9).
  2. Dispositif selon la revendication 1, caractérisé en ce qu'il comprend pour la soupape d'admission (5) et pour la soupape d'échappement (6), un régulateur d'arrivée de soupape (2, 3) propre.
  3. Dispositif de commande selon la revendication 1 ou la revendication 2,
       caractérisé en ce que le régulateur d'arrivée de soupape (2, 3) comprend un processeur et l'ordinateur de communication (1) est, en plus, relié avec l'au moins un régulateur d'arrivée de soupape (2, 3) par l'intermédiaire d'une interface (7) de communication bidirectionnelle pour l'échange des données.
  4. Dispositif de commande selon l'une quelconque des revendications précédentes en combinaison avec la revendication 3, caractérisé en ce que chaque régulateur d'arrivée de soupape (2, 3) détecte la position des soupapes (5, 6) et communique à l'ordinateur de communication (1) un dysfonctionnement d'une des soupapes (5, 6).
  5. Dispositif de commande selon l'une quelconque des revendications
       précédentes, caractérisé en ce que l'ordinateur de communication (1) surveille au moins un des paramètres de fonctionnement du circuit et des soupapes (5, 6) actionnées électro-mécaniquement suivants : température des étages de sortie, tension d'alimentation des étages de sortie, tension d'alimentation des capteurs de position utilisés, tension d'alimentation de tous les régulateurs d'arrivée de soupape (2, 3).
  6. Dispositif de commande selon l'une quelconque des revendications
       précédentes, caractérisé par plusieurs ordinateurs de communication (1).
  7. Dispositif de commande selon la revendication 6, caractérisé par un ordinateur de communication (1) propre pour toutes les soupapes d'admission (5) et un ordinateur de communication (1) propre pour toutes les soupapes d'échappement (6).
  8. Dispositif de commande selon l'une quelconque des revendications
       précédentes, caractérisé en ce que plusieurs régulateurs d'arrivée (2, 3) de soupape sont regroupés avec les étages de sortie correspondants dans un boítier qui est raccordé à un système de refroidissement actif.
  9. Dispositif de commande selon l'une quelconque des revendications
       précédentes en combinaison avec la revendication 4, caractérisé en ce que lors de l'indication d'une défaillance de soupape par un des régulateurs d'arrivée de soupape (2, 3), l'ordinateur de communication (1) produit l'arrêt des autres soupapes (5, 6) du cylindre concerné dans la position de fermeture.
  10. Dispositif de commande selon l'une quelconque des revendications
       précédentes en combinaison avec la revendication 2, caractérisé en ce qu'un circuit (13, 14, 15, 16) est prévu dans la ligne d'alimentation de chaque enroulement (10, 11) d'un électro-aimant, le signal de distribution correspondant étant envoyé au circuit (13, 14 ,15, 16), de telle façon que le circuit (13, 14, 15, 16) produit, directement par le signal de distribution, une interruption directe de l'alimentation de l'enroulement (10, 11) correspondant
  11. Dispositif de commande selon la revendication 10, caractérisé en ce que le
       circuit (13, 14, 15, 16) comprend à chaque fois une porte ET (15, 16) dans la ligne d'alimentation de chaque enroulement (10, 11), dont la sortie est raccordée à l'enroulement (10, 11) correspondant, dont une entrée est reliée avec le régulateur d'arrivée de soupape (2, 3) et dont l'autre entrée est reliée avec la ligne de communication (4) pour le signal de distribution correspondant, celle-ci conduisant de l'ordinateur de communication (1) au régulateur d'arrivée de soupape (2, 3) par l'intermédiaire d'une porte ET (13), qui est raccordée, en outre, au régulateur d'arrivée de soupape (2, 3), de telle façon que lors d'une activation de la porte ET (13) par l'intermédiaire du régulateur d'arrivée de soupape (2, 3), le signal de distribution produit une interruption directe de l'alimentation des enroulements (10, 11) correspondants.
EP00936636A 1999-04-21 2000-04-20 Circuit destine a la commande au moins d'une soupape d'admission et d'evacuation d'un moteur a combustion interne, respectivement actionnee par voie electromecanique Expired - Lifetime EP1171702B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19918095 1999-04-21
DE19918095A DE19918095C1 (de) 1999-04-21 1999-04-21 Schaltung zur Steuerung mindestens eines jeweils elektromechanisch betätigten Ein- und Auslaßventils einer Brennkraftmaschine
PCT/DE2000/001250 WO2000063544A1 (fr) 1999-04-21 2000-04-20 Circuit destine a la commande au moins d'une soupape d'admission et d'evacuation d'un moteur a combustion interne, respectivement actionnee par voie electromecanique

Publications (2)

Publication Number Publication Date
EP1171702A1 EP1171702A1 (fr) 2002-01-16
EP1171702B1 true EP1171702B1 (fr) 2004-07-21

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EP00936636A Expired - Lifetime EP1171702B1 (fr) 1999-04-21 2000-04-20 Circuit destine a la commande au moins d'une soupape d'admission et d'evacuation d'un moteur a combustion interne, respectivement actionnee par voie electromecanique

Country Status (5)

Country Link
US (1) US6505113B2 (fr)
EP (1) EP1171702B1 (fr)
JP (1) JP2002542423A (fr)
DE (2) DE19918095C1 (fr)
WO (1) WO2000063544A1 (fr)

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DE10234091A1 (de) * 2002-07-26 2004-02-05 Robert Bosch Gmbh Verfahren zur Überwachung von wenigstens zwei elektromagnetischen Ventilen einer Brennkraftmaschine, insbesondere eines Kraftfahrzeugs
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DE50007133D1 (de) 2004-08-26
WO2000063544A1 (fr) 2000-10-26
US20020072846A1 (en) 2002-06-13
DE19918095C1 (de) 2000-10-12
EP1171702A1 (fr) 2002-01-16
US6505113B2 (en) 2003-01-07

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