EP1010867A1 - Circuit régulateur de tension pour la commande électromagnétique de soupapes de moteur à combustion interne - Google Patents
Circuit régulateur de tension pour la commande électromagnétique de soupapes de moteur à combustion interne Download PDFInfo
- Publication number
- EP1010867A1 EP1010867A1 EP99124310A EP99124310A EP1010867A1 EP 1010867 A1 EP1010867 A1 EP 1010867A1 EP 99124310 A EP99124310 A EP 99124310A EP 99124310 A EP99124310 A EP 99124310A EP 1010867 A1 EP1010867 A1 EP 1010867A1
- 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.)
- Granted
Links
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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 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)
- Magnetically Actuated Valves (AREA)
- Fuel-Injection Apparatus (AREA)
- Valve Device For Special Equipments (AREA)
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 true EP1010867A1 (fr) | 2000-06-21 |
EP1010867B1 EP1010867B1 (fr) | 2004-07-28 |
Family
ID=11417231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99124310A Expired - Lifetime EP1010867B1 (fr) | 1998-12-09 | 1999-12-06 | Circuit régulateur de tension pour la commande électromagnétique de soupapes de moteur à combustion interne |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1010867B1 (fr) |
DE (1) | DE69918932T2 (fr) |
ES (1) | ES2222653T3 (fr) |
IT (1) | IT1303595B1 (fr) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1176287A1 (fr) * | 2000-07-27 | 2002-01-30 | Peugeot Citroen Automobiles SA | Dispositif de pilotage des actionneurs de soupapes d'un moteur à combustion interne à courant d'alimentation stabilisé |
WO2004016926A1 (fr) * | 2002-07-26 | 2004-02-26 | Robert Bosch Gmbh | Procede pour commander et/ou regler un convertisseur de tension continue destine a au moins deux soupapes electromagnetiques d'un moteur a combustion interne appartenant notamment a un vehicule automobile |
US6948461B1 (en) * | 2004-05-04 | 2005-09-27 | Ford Global Technologies, Llc | Electromagnetic valve actuation |
US6971346B2 (en) | 2004-03-18 | 2005-12-06 | Ford Global Technologies, Llc | System for controlling electromechanical valves in an engine |
EP1653066A1 (fr) * | 2004-10-08 | 2006-05-03 | C.R.F. Società Consortile per Azioni | Un dispositif pour commande de soupape électronique d'injection et de soupape électronique d'un moteur à combustion interne et méthode pour celui-ci. |
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 |
US7367296B2 (en) | 2004-06-21 | 2008-05-06 | Ford Global Technologies, Llc | Bi-directional power electronics circuit for electromechanical valve actuator of an internal combustion 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 |
US7540264B2 (en) | 2004-06-21 | 2009-06-02 | Ford Global Technologies, Llc | Initialization of electromechanical valve actuator in an internal combustion engine |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4801859A (en) * | 1986-12-23 | 1989-01-31 | Sundstrand Corporation | Boost/buck DC/DC converter |
EP0376715A2 (fr) * | 1988-12-29 | 1990-07-04 | Isuzu Motors Limited | Dispositif d'entraînement de vanne, commandé électromagnétiquement |
EP0727566A2 (fr) * | 1995-02-15 | 1996-08-21 | Toyota Jidosha Kabushiki Kaisha | Un dispositif d'entraînement de soupape utilisant une bobine électromagnétique pour déplacer un corps de soupape avec moins de bruit |
JPH10131726A (ja) * | 1996-10-25 | 1998-05-19 | Isuzu Motors Ltd | 電磁駆動バルブ駆動回路 |
US5793599A (en) * | 1995-06-14 | 1998-08-11 | Fev Motorentechnik Gmbh & Co. Kg | Control of the attraction of an armature of a switching magnet and a switching arrangement for performing the method |
-
1998
- 1998-12-09 IT IT1998TO001027A patent/IT1303595B1/it active IP Right Grant
-
1999
- 1999-12-06 EP EP99124310A patent/EP1010867B1/fr not_active Expired - Lifetime
- 1999-12-06 DE DE69918932T patent/DE69918932T2/de not_active Expired - Lifetime
- 1999-12-06 ES ES99124310T patent/ES2222653T3/es not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4801859A (en) * | 1986-12-23 | 1989-01-31 | Sundstrand Corporation | Boost/buck DC/DC converter |
EP0376715A2 (fr) * | 1988-12-29 | 1990-07-04 | Isuzu Motors Limited | Dispositif d'entraînement de vanne, commandé électromagnétiquement |
EP0727566A2 (fr) * | 1995-02-15 | 1996-08-21 | Toyota Jidosha Kabushiki Kaisha | Un dispositif d'entraînement de soupape utilisant une bobine électromagnétique pour déplacer un corps de soupape avec moins de bruit |
US5793599A (en) * | 1995-06-14 | 1998-08-11 | Fev Motorentechnik Gmbh & Co. Kg | Control of the attraction of an armature of a switching magnet and a switching arrangement for performing the method |
JPH10131726A (ja) * | 1996-10-25 | 1998-05-19 | Isuzu Motors Ltd | 電磁駆動バルブ駆動回路 |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 10 31 August 1998 (1998-08-31) * |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1176287A1 (fr) * | 2000-07-27 | 2002-01-30 | Peugeot Citroen Automobiles SA | Dispositif de pilotage des actionneurs de soupapes d'un moteur à combustion interne à courant d'alimentation stabilisé |
FR2812340A1 (fr) * | 2000-07-27 | 2002-02-01 | Peugeot Citroen Automobiles Sa | Dispositif de pilotage des actionneurs de soupapes d'un moteur a combustion interne a courant d'alimentation stabilise |
WO2004016926A1 (fr) * | 2002-07-26 | 2004-02-26 | Robert Bosch Gmbh | Procede pour commander et/ou regler un convertisseur de tension continue destine a au moins deux soupapes electromagnetiques d'un moteur a combustion interne appartenant notamment a un vehicule automobile |
CN100376777C (zh) * | 2002-07-26 | 2008-03-26 | 罗伯特-博希股份公司 | 用于内燃机的至少两个电磁阀的直流变压器的控制方法及装置 |
US6971346B2 (en) | 2004-03-18 | 2005-12-06 | Ford Global Technologies, Llc | System for controlling electromechanical valves in an engine |
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 |
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 |
US7367296B2 (en) | 2004-06-21 | 2008-05-06 | Ford Global Technologies, Llc | Bi-directional power electronics circuit for electromechanical valve actuator of an internal combustion engine |
US7540264B2 (en) | 2004-06-21 | 2009-06-02 | Ford Global Technologies, Llc | Initialization of electromechanical valve actuator in an internal combustion engine |
EP1653066A1 (fr) * | 2004-10-08 | 2006-05-03 | C.R.F. Società Consortile per Azioni | Un dispositif pour commande de soupape électronique d'injection et de soupape électronique d'un moteur à combustion interne et méthode pour celui-ci. |
US7117852B2 (en) | 2004-10-08 | 2006-10-10 | C.R.F. Societa Consortile Per Azioni | Single device for controlling fuel electro-injectors and electrovalves in an internal-combustion engine, and method of operating the same |
Also Published As
Publication number | Publication date |
---|---|
ITTO981027A0 (it) | 1998-12-09 |
ES2222653T3 (es) | 2005-02-01 |
ITTO981027A1 (it) | 2000-06-09 |
IT1303595B1 (it) | 2000-11-14 |
EP1010867B1 (fr) | 2004-07-28 |
DE69918932T2 (de) | 2005-08-11 |
DE69918932D1 (de) | 2004-09-02 |
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