EP1010867B1 - Spannungsregelschaltung für elektromagnetische Hubventilbetätigung in einer Brennkraftmaschine - Google Patents

Spannungsregelschaltung für elektromagnetische Hubventilbetätigung in einer Brennkraftmaschine Download PDF

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Publication number
EP1010867B1
EP1010867B1 EP99124310A EP99124310A EP1010867B1 EP 1010867 B1 EP1010867 B1 EP 1010867B1 EP 99124310 A EP99124310 A EP 99124310A EP 99124310 A EP99124310 A EP 99124310A EP 1010867 B1 EP1010867 B1 EP 1010867B1
Authority
EP
European Patent Office
Prior art keywords
voltage
current
power supply
terminal
regulator circuit
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
EP99124310A
Other languages
English (en)
French (fr)
Other versions
EP1010867A1 (de
Inventor
Stefano Cardelli
Andrea Nepote
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.)
Marelli Europe SpA
Original Assignee
Magneti Marelli Powertrain SpA
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 Magneti Marelli Powertrain SpA filed Critical Magneti Marelli Powertrain SpA
Publication of EP1010867A1 publication Critical patent/EP1010867A1/de
Application granted granted Critical
Publication of EP1010867B1 publication Critical patent/EP1010867B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0253—Fully variable control of valve lift and timing using camless actuation systems such as hydraulic, pneumatic or electromagnetic actuators, e.g. solenoid valves
    • 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 present invention relates to a voltage-regulator circuit for the electromagnetic driving of the valves of an internal combustion engine, of the type defined in the preamble to Claim 1 and, more particularly, to a circuit of this type for recovering the energy stored in the valve-actuating coils.
  • a voltage-regulator circuit for the electromagnetic driving of the valves of an internal combustion engine of the type defined in the preamble to Claim 1 and, more particularly, to a circuit of this type for recovering the energy stored in the valve-actuating coils.
  • a system for the electromagnetic driving of the intake and exhaust valves of an internal combustion engine comprises, for each valve, at least one respective actuating coil which can be connected selectively to a supply circuit. This circuit supplies an actuating current to each coil in order to open and/or to close the valve.
  • This precision can be achieved by rapid actuation of the valve, for which it is necessary for the voltages available in the supply circuit to be sufficiently higher than the battery voltage available at present in most vehicles (12 volts), for example, of the order of 42 volts.
  • the load represented by the actuating coil is a highly inductive load, it is preferable for the current recirculation also to take place with the supply, to the terminals of the coil, of voltages which are sufficiently higher than the normal battery voltage.
  • a circuit for driving an inductive load in general, and valve-actuating coils in particular is formed with the provision of a Zener power diode which connects the load to an earth conductor in order to discharge the energy stored in the load.
  • the subject of the invention is a voltage-regulator circuit for the electromagnetic driving of the valves of an internal combustion engine having the characteristics recited in the appended claims.
  • the solution according to the invention consists in providing the voltage-regulator circuit with a capacitive energy-storage element for receiving a discharge current from the coils and for conveying this current in a controlled manner to a supply (or battery) by means of a switching current-regulator circuit.
  • the solution according to the invention also enables the capacitive element to be charged rapidly by means of the same current-regulator circuit in order to provide the terminals of the coils with a voltage sufficiently higher than the battery voltage without waiting for the capacitive element to be charged purely by the discharge currents of the coils.
  • the voltage-regulator circuit comprises a storage capacitor C arranged between a node A and an earth conductor, and a switching current-regulator circuit 10 coupled to the capacitor C, and more precisely to the terminal of the capacitor corresponding to the node A.
  • the current-regulator circuit 10 is coupled, on the opposite side to the node A, to a battery 12 or to another direct-current supply which can provide a supply voltage V B .
  • a voltage V A relative to the earth conductor which, in operating conditions, is substantially equivalent to a predetermined reference voltage V ref , considerably greater than the supply voltage V B .
  • a recirculation network is also connected to the node A.
  • these coils 16 can be connected selectively, by known circuits which are not shown in the drawing and are not referred to in the description, to a supply circuit which, for example, is connected to the same battery 12.
  • the recirculation network 14 is arranged to recirculate the transient discharge current which is generated every time each coil 16 is disconnected from the supply circuit.
  • the current-regulator circuit 10 comprises an inductor L, of which a first terminal is connected to the battery 12 and a second terminal is connected to the node A via a first MOSFET transistor Q1 and to the earth conductor via a second MOSFET transistor Q2.
  • the parasitic diodes D1 and D2 present between the drain and source electrodes of the transistors Q1 and Q2, respectively, are indicated in the drawing.
  • control unit shown separately is indicated ECU.
  • the control unit is arranged to receive an input signal indicative of the voltage V A present at the node A and to control the transistors Q1 and Q2 at their gate electrodes.
  • the voltage-regulator circuit is driven by the control unit (ECU) as a voltage booster for rapidly increasing the voltage V A until a voltage corresponding to the predetermined reference voltage V ref , and such as to permit recirculation of current at high voltage, is reached.
  • ECU control unit
  • the control unit detects the voltage V A present at the node A and drives the transistors Q1 and Q2 accordingly. When the voltage V A is below the predetermined value V ref , the control unit cuts off the transistor Q1 and turns the transistor Q2 on, drawing current from the battery, through the inductor L, towards the earth, charging the inductor. The control unit also monitors the current flowing in the transistor Q2 and, when this reaches a predetermined intensity, cuts off Q2 and turns Q1 on, causing the inductor L to be discharged to the storage capacitor C, which is consequently charged. The control unit then repeats the cycle until the voltage at the node A reaches the predetermined value V ref .
  • the storage capacitor C is charged, by means of the recirculation network 14, by the transient discharge currents of the coils 16.
  • the control unit recognizes this condition and drives the voltage-regulator circuit as a voltage-reducer in order to bring the voltage V A back to a value as close as possible to V ref , enabling the storage capacitor C to release current towards the battery and to recharge the battery.
  • the control unit drives the transistor Q2 in the off state and the transistor Q1 in the on state, returning current from the storage capacitor C, through the inductor L, to the battery 12, charging the inductor.
  • the control unit also monitors the current flowing in the transistor Q1 and, when this reaches a predetermined intensity, cuts off Q1 and turns Q2 on, causing the inductor L to be discharged towards the battery 12 which is consequently recharged.
  • a current sensor is not required since the predetermined current intensity which leads to the switching of the transistors Q1 and Q2, and the conduction times of the transistors, can be calculated analytically by the control unit exclusively on the basis of the information relating to the voltage value at the node A, to the voltage value V B , and to the inductance of the inductor L.
  • This solution is advantageous since it ensures greater efficiency in the discharge of the coils and consequently in the recharging of the battery and enables the dimensions of the circuit used to be reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Dc-Dc Converters (AREA)
  • Electronic Switches (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Valve Device For Special Equipments (AREA)
  • Magnetically Actuated Valves (AREA)

Claims (5)

  1. Spannungsreglerschaltung für das elektromagnetische Steuern der Ventile eines Verbrennungsmotors, wobei jedes Ventil zumindest eine jeweilige Aktivierungsspule (16) umfasst, welche selektiv an eine Stromversorgungsschaltung gekoppelt werden kann,
    umfassend:
    zumindest ein kapazitives Energiespeicherelement (C) zum Ankoppeln an ein Stromrückführungsnetz (14), das mit der zumindest einen entsprechenden Spule (16) jedes Ventils verbunden ist, welches Energiespeicherelement eine erste, am Rückführungsnetz (14) angeschlossene Polklemme und eine zweite, an einem Erdleiter angekoppelte Polklemme aufweist, und
    einen Stromreglerschaltkreis (10), der zwischen einer Gleichstromversorgung (12) und dem zumindest einen kapazitiven Element (C) angeordnet sein kann,
       wobei die Spannungsreglerschaltung dadurch gekennzeichnet ist, dass das zumindest eine kapazitive Element (C) dazu angepasst ist, bei stabiler Betriebsbedingung an der ersten Polklemme eine Spannung (VA) aufzuweisen, die im Wesentlichen einer vorbestimmten Vergleichsspannung (Vref) entspricht, welche größer als die von der Stromversorgung (12) gelieferte Spannung (VB) ist,
       und die Spannungsreglerschaltung dazu eingerichtet ist, als Spannungserhöher für die von der Stromversorgung (12) zum Rückführungsnetz (14) fließende Spannung und als Abschwächer für die vom Rückführungsnetz (14) zur Stromversorgung (12) fließende Spannung zu wirken.
  2. Schaltung gemäß Anspruch 1, dadurch gekennzeichnet, dass die Stromreglerschaltung (10) Folgendes umfasst:
    ein induktives Element (L) mit einer ersten Polklemme zum Ankoppeln an der Stromversorgung (12) und einer zweiten Polklemme zum Ankoppeln an einer ersten Polklemme des zumindest einen kapazitiven Elements (C) über erste Schaltmittel (Q1), und
    zweite Schaltmittel (Q2), die zwischen der zweiten Polklemme des induktiven Elements (L) und dem Erdleiter gekoppelt sind.
  3. Schaltung gemäß Anspruch 1, dadurch gekennzeichnet, dass das zumindest eine kapazitive Element (C) dazu angepasst ist:
    über den Stromregler (10) einen Strom von der Stromversorgung (12) zu empfangen, wenn der Wert der Spannung an der ersten Polklemme (VA) unter dem vorbestimmten Vergleichsspannungswert (Vref) liegt,
    einen transienten Entladungsstrom vom Rückführungsnetz (14) zu empfangen, welcher jedes Mal erzeugt wird, wenn alle Spulen (16) von der Stromversorgung (12) getrennt werden, und
    über den Stromregler (10) einen Strom hin zur Stromversorgung (12) freizusetzen, wenn der Wert der Spannung an der ersten Polklemme (VA) größer als der Wert der vorbestimmten Vergleichsspannung (Vref) ist.
  4. Spannungsreglerschaltung gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie eine Steuereinheit (ECU) umfasst, um einen Spannungswert (VA) an der ersten Polklemme des zumindest einen kapazitiven Elements (C) zu detektieren und die Leitung in den ersten und zweiten Schaltmitteln (Q1, Q2) in vorbestimmter Weise zu steuern, um zu bewirken, dass Strom selektiv von der Stromversorgung (12) zu dem zumindest einen kapazitiven Element (C) oder umgekehrt geliefert wird, und zwar abhängig vom detektierten Spannungswert (VA).
  5. Schaltung gemäß einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die ersten und zweiten Schaltmittel (Q1, Q2) als MOSFET-Transistoren gebildet sind.
EP99124310A 1998-12-09 1999-12-06 Spannungsregelschaltung für elektromagnetische Hubventilbetätigung in einer Brennkraftmaschine Expired - Lifetime EP1010867B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO981027 1998-12-09
IT1998TO001027A IT1303595B1 (it) 1998-12-09 1998-12-09 Circuito regolatore di tensione per il pilotaggio elettromagneticodelle valvole di un motore a combustione interna.

Publications (2)

Publication Number Publication Date
EP1010867A1 EP1010867A1 (de) 2000-06-21
EP1010867B1 true EP1010867B1 (de) 2004-07-28

Family

ID=11417231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99124310A Expired - Lifetime EP1010867B1 (de) 1998-12-09 1999-12-06 Spannungsregelschaltung für elektromagnetische Hubventilbetätigung in einer Brennkraftmaschine

Country Status (4)

Country Link
EP (1) EP1010867B1 (de)
DE (1) DE69918932T2 (de)
ES (1) ES2222653T3 (de)
IT (1) IT1303595B1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2812340B1 (fr) * 2000-07-27 2002-10-31 Peugeot Citroen Automobiles Sa Dispositif de pilotage des actionneurs de soupapes d'un moteur a combustion interne a courant d'alimentation stabilise
DE10234098A1 (de) * 2002-07-26 2004-02-05 Robert Bosch Gmbh Verfahren zur Steuerung und/oder Regelung eines Gleichspannungswandlers für wenigstens zwei elektromagnetische Ventile einer Brennkraftmaschine, insbesondere eines Kraftfahrzeugs
US7054737B2 (en) 2004-03-18 2006-05-30 Ford Global Technologies, Llc Power electronics circuit with voltage regulator for electromechanical valve actuator of an internal combustion engine
US6971346B2 (en) 2004-03-18 2005-12-06 Ford Global Technologies, Llc System for controlling electromechanical valves in an engine
US7509931B2 (en) 2004-03-18 2009-03-31 Ford Global Technologies, Llc Power electronics circuit for electromechanical valve actuator of an internal combustion engine
US6948461B1 (en) * 2004-05-04 2005-09-27 Ford Global Technologies, Llc Electromagnetic valve actuation
US7036469B2 (en) 2004-06-21 2006-05-02 Ford Global Technologies, Llc Bi-directional power electronics circuit for electromechanical valve actuator of an internal combustion engine
US7021255B2 (en) 2004-06-21 2006-04-04 Ford Global Technologies, Llc Initialization of electromechanical valve actuator in an internal combustion engine
EP1653066B1 (de) * 2004-10-08 2007-02-07 C.R.F. Società Consortile per Azioni Vorrichtung zum Steuern der Elektroeinspritzventile und Elektroventile einer Brennkraftmaschine und eine Methode dafür

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4801859A (en) * 1986-12-23 1989-01-31 Sundstrand Corporation Boost/buck DC/DC converter
JPH0621530B2 (ja) * 1988-12-29 1994-03-23 いすゞ自動車株式会社 バルブ駆動装置
JP3134724B2 (ja) * 1995-02-15 2001-02-13 トヨタ自動車株式会社 内燃機関の弁駆動装置
DE19521676A1 (de) * 1995-06-14 1996-12-19 Fev Motorentech Gmbh & Co Kg Regelung des Anzuges eines Ankers eines Schaltmagneten und Schaltanordnung zur Durchführung des Verfahrens
JPH10131726A (ja) * 1996-10-25 1998-05-19 Isuzu Motors Ltd 電磁駆動バルブ駆動回路

Also Published As

Publication number Publication date
ITTO981027A1 (it) 2000-06-09
DE69918932T2 (de) 2005-08-11
ES2222653T3 (es) 2005-02-01
DE69918932D1 (de) 2004-09-02
IT1303595B1 (it) 2000-11-14
ITTO981027A0 (it) 1998-12-09
EP1010867A1 (de) 2000-06-21

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