EP1171702A1 - 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

Info

Publication number
EP1171702A1
EP1171702A1 EP00936636A EP00936636A EP1171702A1 EP 1171702 A1 EP1171702 A1 EP 1171702A1 EP 00936636 A EP00936636 A EP 00936636A EP 00936636 A EP00936636 A EP 00936636A EP 1171702 A1 EP1171702 A1 EP 1171702A1
Authority
EP
European Patent Office
Prior art keywords
valves
circuit
circuit according
control
communication computer
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.)
Granted
Application number
EP00936636A
Other languages
German (de)
English (en)
Other versions
EP1171702B1 (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
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7905360&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1171702(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bayerische Motoren Werke AG, Siemens AG filed Critical Bayerische Motoren Werke AG
Publication of EP1171702A1 publication Critical patent/EP1171702A1/fr
Application granted granted Critical
Publication of EP1171702B1 publication Critical patent/EP1171702B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • 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 controlling at least one electromechanically operated inlet and outlet valve of an internal combustion engine.
  • Electro-mechanical actuators for gas exchange valves are known for example from DE 297 12 502 U1 or EP 0 724 067 AI. They have a rest position lying between a closed and an open position, from which they can be deflected by means of electromagnets.
  • the respective winding is energized, the current required in the catching phase being greater than m in the holding phase in which the valve is held in an end position.
  • valve disk hits the valve seat at high speed, which is noise-generating and requires wear. To avoid this, the impact speed should be reduced. To do this, mechanical impact steaming was examined.
  • the energization is suitably controlled, which, however, requires a relatively complex control algorithm, since this regulation must take place in real time. - for example, the time available to control the speed of impact is only a few milliseconds.
  • the invention is based on the knowledge that the regulation of the impact speed should be separated from the communication with the operating control device and the generation of a tent control signal from the specifications of the operating control device.
  • the communication computer preferably carries out the communication with the operating control device of the internal combustion engine via a CAN bus and generates the timing signals for the touchdown regulators from the crankshaft signal likewise supplied and the requirements of the operating control device.
  • These tent control signals are each n usually a digital signal in which the increasing Flank indicates a valve opening and the falling flank indicates valve closing.
  • a separate timing signal ⁇ em is applied to the corresponding touchdown control in a unidirectional communication.
  • Tent control signal can be provided to give greater freedom when operating the coils.
  • the communication computer evaluates the crankshaft signal, communicates with the operating control device of the internal combustion engine and generates the tent control signals for the slip-on controllers depending on the data received from the operating control device, the latter are kept free for the control application and the control is not used by others (communication ) Tasks interrupted. Furthermore, the tasks of the touchdown control can be parallelized by using several touchdown regulators, which means that a control algorithm is less time-critical. Because a central communication and timing control unit is provided with the communication computer, there is only one communication partner for other control devices and there is no possibility of incorrect synchronization of the individual touchdown regulators and therefore of the electromechanically operated gas exchange valves. Since the touchdown regulators advantageously work digitally and are additionally connected to the communication computer via a serial interface and report the states of the electromechanically actuated gas exchange valves to the communication computer, all states are centrally known and available.
  • the communication computer can instruct the other two valves of the cylinder to be shut down, ie to move to the closed position.
  • the internal combustion engine can then run in an emergency mode without this cylinder, without unburned fuel m getting into the exhaust tract or combustion gases into the intake tract.
  • the provision of several touchdown regulators further enables mutual monitoring of all processors used in the circuit, in particular that of the communication computer and that of the touchdown regulators.
  • the coils of the electromechanical gas exchange valves are actuated by the add-on regulators via AND gates, the second input of which can be actuated by the time control signal which the communication computer supplies to the add-on regulator if the add-on regulator does so by a corresponding blocking element has unlocked.
  • Fig. 1 is a schematic representation of the circuit with electromechanically operated gas exchange valves for a
  • Fig. 2 is a schematic representation of the control of two
  • Fig. 3 shows the time course of a timing signal and the energization control of a gas exchange valve for different operating states.
  • the circuit of FIG. 1 is used to control electromechanically driven gas exchange valves 5a, 5b, 6a, 6b.
  • electromechanically driven gas exchange valve is described, for example, in German utility model 297 12 502 U1. It is only essential for the understanding of this invention that the electromechanically actuated gas exchange valve is actuated by energizing two coils, one coil being responsible for closing and the other for opening the gas exchange valve. In order to hold the gas exchange valve in the open or the closed position, the respective coil is energized with a holding current. In order to bring the gas exchange valve into the open or closed position, the coil required in each case is supplied with current, the current being greater in a catching phase than in the subsequent holding phase.
  • Cylinder internal combustion engine shown but this number of cylinders is only to be understood as an example.
  • a cylinder has two intake valves 5a, 5b and two exhaust valves 6a, 6b.
  • a separate touchdown regulator 2 and 3 is provided for the inlet and outlet valves 5a, 5b and 6a, 6b.
  • the Aufsetzregier 2, 3 controls output stages, which bring about the energization of the respective coils of the gas exchange valve 5a, 5b, 6a, 6b.
  • a separate output stage is provided for each coil.
  • the Aufsetzregier 2, 3 and the output stages are housed in a housing that is connected to the cooling circuit of the internal combustion engine to ensure uniform heat dissipation.
  • the touchdown control 2, 3 controls the output stages of a valve 5, 6 as a function of a time control signal TS which indicates when the valve has to open or close.
  • a time control signal TS which indicates when the valve has to open or close.
  • a separate time control signal TS can also be provided for each valve.
  • the tent control signal TS is, for example, a rectangular signal, in which the falling edge indicates the closing and the rising edge indicates the opening of the associated valve. It is fed to the touchdown regulator 2, 3 via a unidirectional communication line 4 from a communication computer 1, which will be described later.
  • the placement controller 2, 3 has a digital processor which controls the energization of the coils through the output stages in such a way that the valve 5a, 5b, 6a, 6b gently touches the desired end position.
  • the energization of the coil of the end position to be left is switched off and the energization of the winding of the electromagnet is switched on for the new end position to be assumed.
  • the current is regulated by the processor of the touchdown controller 2, 3 so that the valve touches the new end position gently.
  • the touchdown regulator 2, 3 uses a position signal which provides information about the position of the respective valve 5a, 5b, 6a, 6b.
  • each electromechanically actuated valve 5a, 5b, 6a, 6b is provided with a suitable position sensor, as described, for example, in German application 197 53 275 or DE 195 18 056 AI.
  • the guide and control size of the add-on controller can also be any other size.
  • the regulation of the coil current for catching the valve 5a, 5b, 6a, 6b is described in principle, for example, in DE 195 26 683 AI.
  • the touchdown regulator measures the actual current through the coil and outputs the TARGET value to the output stage.
  • another size can be used which expresses the actuation of the actuator, e.g. the driver voltage of the output stage.
  • Winding energization a plausibility check of the signals, ie the position signal and the coil energization From the latter, as is known from DE 195 26 683 AI, a further signal can be derived, which enables statements about the position of the corresponding gas exchange valve 5a, 5b, 6a, 6b, so that the position signal by means of this further signal can be checked.
  • the touchdown control 2, 3 is connected to the communication computer 1 via a further serial SPI-BUS interface and reports the status of the valves 5a, 5b, 6a, 6b or a 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 device 9 of the internal combustion engine.
  • a BUS connection is described, for example, in W. Lawrenz, CAN
  • the communication computer 1 is advantageously housed in the same cooled housing as the Aufsetzregier 2, 3 and the output stages. He also receives the crankshaft signal and uses it to calculate the timing signals TS for the touchdown regulators 2, 3 together with the requirements of the operating control device and outputs them via the unidirectional communication lines 4 to the touchdown regulators 2, 3. It also communicates with touchdown controllers 2, 3 via the SPI-BUS 7 and exchanges the status information or error information. Furthermore, the communication computer 1 monitors the entire electromechanical valve train, i.e.
  • the temperature of the output 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
  • the supply voltage of the touchdown regulator 2, 3 usually 3.3 V
  • a touchdown control for example touchdown control 2 of intake valves 5a, 5b of cylinder number 1
  • This enables emergency operation of the internal combustion engine without the unburned fuel m reaching the exhaust tract through the cylinder concerned, which could lead to undesirable deflagrations and pollutant emissions.
  • FIG. 2 shows an example of a control method between a touchdown regulator 3 and the valves 6a, 6b.
  • the normally open coils 11a, 11b of the gas exchange valves 6a, 6b are connected to the final stages integrated in the mounting regulator 2, 3 via an AND gate 16a, 16b each.
  • the AND gates 16a, 16b can also be provided to control the output stages.
  • the second input of the AND gates 16a, 16b is connected via an inverter 14 to a branch 12 of the communication line 4 for the tent control signal TS, which the communication computer 1 supplies to the touchdown control 3.
  • An AND element 13 is also connected in branch 12, the second input of which is controlled by touchdown control 3.
  • the opener coils 10a, 10b of the gas exchange valves 6a, 6b are connected to the output of the AND gate 13 via AND gates 15a, 15b, with no inverter 14 being provided here.
  • this circuit is as follows: if the Aufsetzregier 3 releases the AND gate 13 via a suitable high-level signal, the timing control signal TS is present at its output, as it is sent from the communication computer 1 via the communication line 4 to the Aufsetzregier 3 for the Valves 6a, 6b is supplied. A falling edge of this time control signal TS is shown in FIG. 3, it indicates that the exhaust valves 6a, 6b are closing.
  • the embarksetzregier 3 recognizes the falling edge of the tent control signal TS, it normally takes a certain time offset t (see FIG. 3) until the energization of the respective winding, in this case the windings 10 of the make coils, is ended.
  • This time offset t is caused by program run times in the processor of the set-up controller 3 and by time constants of the control.
  • the resultant time profile of the energization of the windings 10 is shown in FIG. 3 with curve 20. If the placement controller 3 has now activated the AND element 13, the falling edge of the tent control signal TS via the AND elements 15 causes the energization of the opening coils to end prematurely. This results in the current flow curve shown schematically in curve 21 on the windings 10 of FIG. 3. As can be seen in FIG. 3, the energization then ends without the time offset t.
  • This design enables the Aufsetzregier 3 via the AND gate 13 to have a direct effect of the tent control signal TS on the energization of the windings 10, 11.
  • the communication computer 1 can therefore instruct the Aufsetzregier 3 via the SPI-BUS 7 depending on the operating state to enable this direct access of the tent control signal TS.
  • the inverter 14 in the wiring of the second inputs of the AND gates 16 for the windings 11 of the make coils results in a behavior inverse to that of the opener coils and simultaneously energizes the windings 11 of the make coils.
  • the Aufsetzregier 3 can then suitably initiate the energization of the closer coils.
  • the control described can be provided in all touchdown controllers 2, 3.
  • separate landing gauges 2, 3 are provided for the intake valves 5a, 5b and exhaust valves 6a, 6b of each cylinder, but a different division is also possible, in particular a single landing girder can meet the requirements.
  • at least one further communication computer can be provided, for example, a separate communication computer can be provided for all intake valves 5 and all exhaust valves 6 of the internal combustion engine. This structure provides a certain level of redundancy, since if one of the communication computers fails, the other can take over the tasks of the failed one.

Landscapes

  • 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.
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 true EP1171702A1 (fr) 2002-01-16
EP1171702B1 EP1171702B1 (fr) 2004-07-21

Family

ID=7905360

Family Applications (1)

Application Number Title Priority Date Filing Date
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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US7559309B2 (en) * 2004-03-19 2009-07-14 Ford Global Technologies, Llc Method to start electromechanical valves on an internal combustion engine
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Also Published As

Publication number Publication date
JP2002542423A (ja) 2002-12-10
DE50007133D1 (de) 2004-08-26
EP1171702B1 (fr) 2004-07-21
WO2000063544A1 (fr) 2000-10-26
US20020072846A1 (en) 2002-06-13
DE19918095C1 (de) 2000-10-12
US6505113B2 (en) 2003-01-07

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