WO1999030068A1 - Dispositif de commande d'electrovanne - Google Patents
Dispositif de commande d'electrovanne Download PDFInfo
- Publication number
- WO1999030068A1 WO1999030068A1 PCT/JP1998/005528 JP9805528W WO9930068A1 WO 1999030068 A1 WO1999030068 A1 WO 1999030068A1 JP 9805528 W JP9805528 W JP 9805528W WO 9930068 A1 WO9930068 A1 WO 9930068A1
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- WO
- WIPO (PCT)
- Prior art keywords
- switching means
- series circuit
- power supply
- valve
- electromagnet
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
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- 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
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- 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
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- 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
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- 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
- F02D13/0203—Variable control of intake and exhaust valves
- F02D13/0215—Variable control of intake and exhaust valves changing the valve timing only
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- 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
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- 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 drive device for an electromagnetic valve, and is particularly suitable for driving a plurality of valve bodies that operate in synchronization with each other, such as a plurality of intake valves and an exhaust valve provided in each cylinder of an internal combustion engine.
- the present invention relates to a drive device for an electromagnetic valve.
- an electromagnetic valve used as an intake or exhaust valve of an internal combustion engine has been known, for example, as disclosed in Japanese Patent Application Laid-Open No. 8-2846426.
- the electromagnetic valve includes an armature displaced integrally with the valve body, a pair of electromagnetic coils disposed above and below the armature, and a spring for urging the valve body toward a neutral position.
- the valve body and the armature are held at the neutral position.
- the valve element and the armature are attracted toward the upper electromagnetic coil, while the excitation current is supplied to the lower electromagnetic coil. If so, the valve body and armature are sucked toward the lower electromagnetic coil. Therefore, according to the above-described conventional electromagnetic valve, the valve element can be opened and closed by supplying an appropriate exciting current to each electromagnetic coil alternately. In this case, the displacement ends of the valve body on the valve closing side and the valve opening side are regulated by the armature being attracted to the electromagnetic coil.
- the exciting current supplied to each of the electromagnetic coils is controlled by an H-shaped bridge circuit.
- This H-type bridge circuit is composed of a total of four switching means provided between each terminal of the electromagnetic coil and the positive and negative sides of the power supply. According to such an H-bridge circuit, one pair of switching means located diagonally across the electromagnetic coil is turned on, and the other pair is turned off, so that the electromagnetic coil can be turned off.
- a voltage in a predetermined direction can be applied.
- a voltage in a direction opposite to the predetermined direction can be applied to the electromagnetic coil. Therefore, when the valve body approaches the displacement end, each switching means of the H-shaped bridge circuit is switched on and off, and a voltage in a direction opposite to the exciting current is applied to the electromagnetic coil.
- the electromagnetic force generated by the electromagnetic coil can be quickly eliminated.
- the conventional electromagnetic valve requires four switching means for each electromagnetic coil. That is, one electromagnetic valve has two electromagnetic coils, so eight switching means are required for one electromagnetic valve. Therefore, for example, when the above-mentioned conventional electromagnetic valve is applied to a four-cylinder four-valve engine, 128 switching means are required, and the cost of a driving device for driving the electromagnetic valve is reduced. Will rise. Disclosure of the invention
- An object of the present invention is to reduce the number of switching means required to control an exciting current to an electromagnetic coil for driving a valve element.
- a first electromagnet for driving the valve body in a first predetermined direction and a second electromagnet for driving the valve body in a second predetermined direction are provided, and An electromagnetic valve driving device that opens and closes the valve body with a second electromagnet, Two of the above-mentioned valve elements are made into one valve element group, and a drive circuit is collectively provided for each of the valve element groups,
- the drive circuit comprises three series circuits in which three switching means are connected in series between a first power supply terminal on the high voltage side and a second power supply terminal on the low voltage side,
- the four electromagnets corresponding to each valve element group are achieved by an electromagnetic valve driving device that connects a series connection between the switching means between different series circuits.
- each valve element is driven in the first and second predetermined directions by the first and second electromagnets, respectively.
- Two of the valve elements constitute one valve element group, and a drive circuit is provided for each of the valve element groups.
- the drive circuit is composed of three series circuits in which three switching means are connected in series. Therefore, the exciting currents for the four electromagnets corresponding to the two valve elements can be controlled using nine switching means.
- the four electromagnets are each connected between different series circuits. Therefore, by combining the ON / OFF state of the switching means of each series circuit, it is possible to supply an exciting current in both directions to each electromagnet and to allow the current flowing through each electromagnet to flow into the first power supply terminal. Thus, the electromagnetic force acting on the valve element can be quickly eliminated.
- the drive circuit has first to third switching means connected in series from the first power supply terminal side between the first power supply terminal and the second power supply terminal. It is composed of the first to third series circuits,
- the four electromagnets are connected to a connection between the first and second switching means of the first series circuit and a connection to the first and second switching means of the second series circuit, respectively. Between the connection of the second and third switching means of the first series circuit and the connection of the second and third switching means of the second series circuit; Between the connection of the first and second switching means of the circuit and the connection of the first and second switching means of the third series circuit, and the second connection of the second series circuit. And a connection between the connection of the third switching means and the connection of the second and third switching means of the third series circuit.
- the drive circuit includes first to third series circuits in which first to third switching means are connected in series between a first power supply terminal and a second power supply terminal.
- Four electromagnets are connected between the series circuits.
- the first series means is connected from the second series circuit side. A state is formed in which the exciting current is supplied in the direction toward the circuit side (hereinafter referred to as the first direction).
- first electromagnet corresponding to one of the valve bodies of each valve body group is connected to the connection between the first and second switching means of the first series circuit and the first and second parts of the second series circuit.
- a second electromagnet connected to the second switching means and a connection portion with the second switching means, and a second electromagnet corresponding to the one valve body is connected to a connection portion between the second and third switching means of the first series circuit; And a connection portion between the second series circuit and the second and third switching means,
- the first electromagnet corresponding to the other valve element is connected to the second electromagnet of the second series circuit.
- a second electromagnet connected between the connection part of the second and third switching means and the connection part of the second and third switching means of the third series circuit, and corresponding to the other valve body; May be connected between the connection of the first and second switching means of the second series circuit and the connection of the first and second switching means of the third series circuit.
- the first electromagnet corresponding to one valve element (hereinafter, referred to as a first valve element) of each valve element group is connected to the first and second switching means of the first series circuit. And a connection part between the first and second switching means of the second series circuit.
- the second electromagnet corresponding to the first valve body is connected to the connection between the second and third switching means of the first series circuit and the second and third switching means of the second series circuit. And the connection part.
- the first electromagnet corresponding to the other valve element (hereinafter, referred to as the second valve element) of each valve element group is connected to the connection portion between the second and third switching means of the second series circuit.
- the third series circuit is connected between the connection portions of the second and third switching means.
- the second electromagnet corresponding to the second valve element is connected to the connection between the first and second switching means of the second series circuit and the first and second switching means of the third series circuit. It is connected between the connection part.
- the first and second switching means of the first series circuit, the first and third switching means of the second series circuit, and the second and third switching means of the third series circuit are turned on.
- an exciting current is supplied to the second electromagnet of the first valve body in a direction from the first series circuit side to the second series circuit side, and the second electromagnet of the second valve body is subjected to the second electromagnet.
- a state is formed in which the exciting current is supplied in the direction from the second series circuit side to the third series circuit side.
- the second and third switching means of the first series circuit, the first and third switching means of the second series circuit, and the first and second switching means of the third series circuit When the means is turned on, an exciting current in a direction from the second series circuit toward the first series circuit is supplied to the first electromagnet of the first valve, and the first electromagnet is supplied to the first electromagnet of the second valve.
- a state is formed in which an exciting current is supplied to the electromagnet from the third series circuit side toward the second series circuit side.
- the direction of the exciting current supplied to each electromagnet in these two states is referred to as a positive direction, and the opposite direction is referred to as a reverse direction.
- a state in which a positive exciting current is supplied to the electromagnet is referred to as a power supply state.
- the first switching means of the first series circuit, the second switching means of the second series circuit, and the third switching means of the third series circuit are turned on. Then, a state is formed in which the first electromagnet of the first valve body and the first electromagnet of the second valve body are in a regenerative / reverse current state.
- the first and second switching means of the first series circuit and the third switching means of the second series circuit are turned on, the second electromagnet of the first valve body supplies power. A state is formed.
- the first switching means of the second series circuit and the second and third switching means of the third series circuit are turned on, the second electromagnet of the second valve element is turned on. The state of supply supply is formed.
- the first electromagnet of the second valve element supplies power. A state is formed. Also, when the second and third switching means of the first series circuit and the first switching means of the second series circuit are turned on, the first electromagnet of the first valve body is turned on. A state in which the power supply is turned off is formed. When the third switching means of the first series circuit and the first and second switching means of the second series circuit are turned on, the second electromagnet of the first valve element regenerates and reverses. A current state is formed. When the second and third switching means of the second series circuit and the first switching means of the third series circuit are turned on, the second electromagnet of the second valve body is regenerated. ⁇ A reverse current state is formed o
- the second and third switching means of the first series circuit, the first switching means of the second series circuit, and the second and third switching means of the third series circuit are turned on.
- a state is formed in which the first electromagnet of the first valve body and the second electromagnet of the second valve body are in the power supply state.
- the first and second switching means of the first series circuit, the third switching means of the second series circuit, and the first and second switching means of the third series circuit are turned on.
- the first switching element and / or the first switching element or both of the first switching element and the second switching element are provided by the nine switching means according to the combination of the ON / OFF states.
- the electromagnet 2 can be in a power supply state or a regenerative / reverse current state. In the regenerative / reverse current state, the exciting current flowing through the electromagnet rapidly decreases, and the exciting current in the opposite direction is supplied, so that the electromagnetic force generated by the electromagnet is quickly eliminated. Perish. Therefore, by appropriately realizing the power supply state and the regenerative / reverse current state of each electromagnet in accordance with the operation of the valve, the electromagnetic force acting on the valve after driving the valve can be quickly obtained at the required timing. It can be extinguished.
- a first electromagnet for driving the valve element in a first predetermined direction and a second electromagnet for driving the valve element in a second predetermined direction are provided, and the first and second electromagnets are provided.
- Two of the valve elements are defined as one valve element group, and a drive circuit is collectively provided for each of the valve element groups,
- the drive circuit includes a first and a second series circuit in which three switching means are connected in series between a first power supply terminal on a high voltage side and a second power supply terminal on a low voltage side; Two switching means, and between the second power supply terminal and the second power supply terminal, are arranged so as to allow a current to flow from the second power supply terminal side to the first power supply terminal side.
- One diode and a third series circuit connected in series with the diode at the center,
- the four electromagnets corresponding to each valve element group are connected to a connection between a switching means of the third series circuit and a diode, and a connection between the switching means of the first or second series circuit. This is also achieved by an electromagnetic valve drive connected between them.
- the drive circuit includes first and second series circuits in which three switching means are connected in series, and a diode that allows current to flow from the low voltage side to the high voltage side between the two switching means. And a third series circuit connected in series. Therefore, the exciting current for the four electromagnets can be controlled by eight switching means and one diode. Each of the four electromagnets It is connected between the third series circuit and the first or second series circuit.
- an exciting current in a predetermined direction can be supplied to each electromagnet, and the exciting current flowing through each electromagnet can be supplied to the first magnet.
- the electromagnetic force acting on the valve can be quickly eliminated.
- the drive circuit has first to third switching means connected in series from the first power supply terminal side between the first power supply terminal and the second power supply terminal.
- First and second series circuits, and first switching means serially connected in series from the first power supply terminal side between the first power supply terminal and the second power supply terminal;
- a diode provided to allow current flow from the power supply terminal side to the first power supply terminal side, and a third series circuit having second switching means.
- the four electromagnets are respectively connected between a connection of the first and second switching means of the first series circuit and a connection of the first switching means and the diode of the third series circuit.
- the second series circuit between a connection between the second and third switching means of the first series circuit and a connection between the diode and the second switching means of the third series circuit; Between the connection part of the first and second switching means and the connection part of the first switching means and the diode of the third series circuit; and the second and the second parts of the second series circuit.
- a connection may be made between the connection of the third switching means and the connection of the diode of the third series circuit and the connection of the second switching means.
- the drive circuit comprises: first and second series circuits each having first to third switching means connected in series between a first power supply terminal and a second power supply terminal; and a first switching circuit.
- Means a diode that allows the flow of current from the second power terminal side to the first power terminal side.
- a third series circuit in which the second switching means is connected in series from the first power supply terminal side to the second power supply terminal side. That is, eight switching means and one diode are provided for four electromagnets. The four electromagnets are connected between a first or second series circuit and a third series circuit.
- the electromagnet connected between the connection between the first and second switching means of the first series circuit and the connection between the first switching means and the diode of the third series circuit.
- the first series circuit is connected from the third series circuit side.
- a state is formed in which the exciting current in the first direction toward the circuit is supplied.
- the exciting current flowing in the first direction is reduced to the first direction.
- a state in which the power flows into the power supply terminal 1 is formed.
- a similar state is formed by a combination of the ON / OFF states of the switching means.
- first electromagnet corresponding to one of the valve bodies of each valve body group is connected to the connection between the first and second switching means of the first series circuit and the first electromagnet of the third series circuit.
- a second electromagnet connected between the switching means and the connection part of the diode, and a second electromagnet corresponding to the one valve body being connected to the connection part of the second and third switching means of the first series circuit and the second electromagnet; Connected between the second switching means of the series circuit of No. 3 and the junction of the diode;
- the first electromagnet corresponding to the other valve body is connected to the connection between the second and third switching means of the second series circuit and the second switching means and the diode of the third series circuit.
- a second electromagnet connected to the connection portion between the first and second switching means of the second series circuit and the third series circuit. Connection between the first switching means and the connection of the diode It may be.
- the first electromagnet corresponding to one valve element (hereinafter, referred to as a first valve element) of each valve element group is connected to the first and second switching means of the first series circuit. And a first switching means of the third series circuit and a connection portion of the diode.
- the second electromagnet corresponding to the first valve body is connected to the connection between the second and third switching means of the first series circuit, the second switching means of the third series circuit, and the diode. Connected to the connection part of the node.
- the first electromagnet corresponding to the other valve element (hereinafter, referred to as a second valve element) of each valve element group is connected to a connection portion between the second and third switching means of the second series circuit.
- the third series circuit is connected between the second switching means and the junction of the diode. Further, the second electromagnet corresponding to the second valve body is connected to the connection between the first and second switching means of the second series circuit and the first switching means and the diode of the third series circuit. Connected between the unit.
- the first and second switching means of the first series circuit, the second and third switching means of the second series circuit, and the first and second switching means of the third series circuit are turned on. Then, an exciting current in a direction from the first series circuit side to the third series circuit side is supplied to the second electromagnet of the first valve body, and the third electromagnet of the second valve body is supplied with the third electromagnet. Thus, a state is formed in which the exciting current is supplied in the direction from the series circuit side to the second series circuit side.
- the second and third switching means of the first series circuit, the first and second switching means of the second series circuit, and the first and second switching means of the third series circuit When the switching means is turned on, an exciting current is supplied to the first electromagnet of the first valve body from the third series circuit toward the first series circuit, and the first electromagnet is supplied to the first electromagnet of the second valve.
- a state is formed in which the exciting current is supplied to the electromagnet in the direction from the second series circuit side to the third series circuit side.
- the direction of the exciting current supplied to each electromagnet in these two states is referred to as the positive direction, and the opposite direction is used. Is referred to as a reverse direction.
- a state in which a positive exciting current is supplied to the electromagnet is referred to as a power supply state.
- the third switching means of the first series circuit and the first switching means of the second series circuit are turned on, the second electromagnet and the second switching element of the first valve body are turned on.
- a state is established in which the positive exciting current flowing through the second electromagnet of the valve element flows into the first power supply terminal side.
- the state in which the positive exciting current flowing through the electromagnet flows into the first power supply terminal side is referred to as the regenerative state of the electromagnet.
- the first switching means of the first series circuit and the third switching means of the second series circuit are turned on, the first electromagnet and the second valve body of the first valve body are turned on. A state in which the first electromagnet is brought into a regenerative state is formed.
- the second electromagnet of the first valve body is turned on. Is formed. Also, when the second and third switching means of the second series circuit and the first switching means of the third series circuit are turned on, the second valve body is turned on. The state where the electromagnet is in the power supply state is formed.
- the first electromagnet of the second valve body is in a power supply state. Is formed.
- the second and third switching means of the first series circuit and the first switching means of the third series circuit are turned on, the first electromagnet of the first valve body is turned on. The power supply state is formed.
- the state where the second electromagnet of the first valve body is in the regenerative state. Is formed.
- the first switching means of the second series circuit and the second switching means of the third series circuit are turned on, the second electromagnet of the second valve body is brought into a regenerative state. The formed state is formed.
- the second and third switching means of the first series circuit, the second and third switching means of the second series circuit, and the first switching means of the third series circuit are turned on. Then, a state is formed in which the first electromagnet of the first valve body and the second electromagnet of the second valve body are in the power supply state.
- the first and second switching means of the first series circuit, the first and second switching means of the second series circuit, and the second switching means of the third series circuit When is turned on, a state is established in which the first electromagnet of the second valve body and the second electromagnet of the first valve body are in the power supply state.
- the eight switching means and one diode provide one or both of the first valve body and the second valve body in accordance with the combination of the ON / OFF state of each switching means.
- the first or second electromagnet can be in a power supply state or a regenerative state. In the regenerative state, the exciting current flowing through the electromagnet decreases quickly, so that the electromagnetic force generated by the electromagnet disappears quickly. Therefore, by appropriately realizing the power supply state and the regenerative state of each magnetic stone according to the operation of the valve, the electromagnetic force acting on the valve immediately disappears at the required timing after the valve is driven. Can be done.
- the switching means includes a switching element that performs on / off operation, and a current flowing from the second power supply terminal side to the first power supply terminal side in parallel with the switching element. And a diode provided in the device.
- each switching means is a switch that operates on and off. It has a switching element and a diode provided in parallel with the switching element so as to allow a current to flow from the second power supply terminal side to the first power supply terminal side. Therefore, each switching means allows current to flow from the second power supply terminal side to the first power supply terminal side even when the switching means is in the off state. For this reason, when the supply of the exciting current to the electromagnet is interrupted, the on / off state of the switching means is set so that the closed circuit including the diode and the electromagnetic coil of the switching means is conducted. By setting, the flywheel current can flow through this electromagnet.
- an excitation current having a predetermined current waveform may be supplied to each of the electromagnets by switching a combination of ON and OFF states of the switching means.
- an excitation current having a predetermined current waveform is supplied to each electromagnet by switching the combination of the ON / OFF state of the switching means. Therefore, according to the present invention, it is possible to control the current waveform of the exciting current supplied to the electromagnet while reducing the number of switching means.
- the predetermined current waveform may include a predetermined positive current waveform portion in a positive direction and a reverse current waveform portion in a direction opposite to the positive direction.
- the valve body when a positive exciting current is supplied to the electromagnet, the valve body is driven by the electromagnet.
- an exciting current in the opposite direction is supplied to the electromagnet after the valve body is driven, the electromagnetic force generated by the electromagnet is quickly extinguished. Accordingly, since the current waveform of the exciting current supplied to the electromagnet includes the positive current waveform portion and the reverse current waveform portion, the valve body is driven by the electromagnetic force generated by the electromagnet, and then the electromagnetic force is applied to the required tie. It can be extinguished promptly by mining.
- FIG. 1 is a configuration diagram of an electromagnetic valve driving device according to an embodiment of the present invention. It is.
- FIG. 2 is a diagram showing a current waveform of an exciting current supplied to the upper coil and the lower coil when two electromagnetic valves are driven to open and close together in the present embodiment, and an operation of the electromagnetic valve corresponding to this current waveform.
- FIG. 3 is an internal configuration diagram of the ECU provided in the electromagnetic valve driving device of the present embodiment.
- FIG. 4 is a diagram illustrating an operation state of the drive circuit in which both the # 1 hot coil and the # 2 hot coil are in a power supply state.
- FIG. 5 is a diagram showing an operation state of the drive circuit in which both the # 1 and # 2 upper coils are in a flywheel state.
- FIG. 6 is a diagram showing an operation state of the drive circuit in which both the # 1 and # 2 atpacoils are in a flywheel state.
- FIG. 7 is a diagram illustrating an operation state of the drive circuit in which both the # 1 end coil and the # 2 upper coil are in a regenerative / reverse current state.
- FIG. 8 shows the supply to the # 1 upper coil, # 1 lower coil, # 2 upper coil, and # 2 lower coil when the # 1 electromagnetic valve is opened and closed and the # 2 electromagnetic valve is kept closed in this embodiment.
- FIG. 3 is a diagram showing a current waveform of an exciting current to be applied.
- FIG. 9 is a diagram showing an operation state of the drive circuit in which the # 1 upper coil is in a power supply state and the # 2 upper coil is in a flywheel state.
- FIG. 10 is a diagram showing an operation state of the drive circuit in which the # 1 up-coil is in a flywheel state and the # 2 end-up coil is in a power supply state.
- FIG. 11 is a diagram illustrating an operation state of the drive circuit in which the # 1 upper coil is in the regenerative / reverse current state and the # 2 upper coil is in the flywheel state.
- FIG. 7 is a diagram illustrating an operation state of the drive circuit in the down state.
- FIG. 13 is a diagram showing an operation state of the drive circuit in which the # 1 lower coil is set to the power supply state and the # 2 upper coil is set to the flywheel state.
- FIG. 14 is a diagram illustrating an operation state of the drive circuit in which the # 1 lower coil is in a flywheel state and the # 2 upper coil is in a power supply state.
- FIG. 15 is a diagram showing the operating state of the drive circuit in which both the # 1 lower coil and the # 2 upper coil are in a flywheel state.
- FIG. 16 is a diagram showing an operation state of the drive circuit in which the # 1 lower coil is in the regenerative / reverse current state and the # 2 atpa coil is in the flywheel state.
- FIG. 17 is an internal configuration diagram of the ECU provided in the electromagnetic valve driving device according to the second embodiment of the present invention.
- FIG. 18 is a diagram illustrating an operation state of the drive circuit in which both the # 1 upper coil and the # 2 upper coil are in the regenerative state.
- FIG. 19 is a diagram showing an operation state of the drive circuit in which the # 1 hot coil is in the regenerative state and the # 2 hot coil is in the flywheel state.
- FIG. 20 is a diagram showing an operation state of the drive circuit in which the # 1 lower coil is in the regenerative state and the # 2 upper coil is in the flywheel state.
- FIG. 21 is a diagram showing a current waveform of an exciting current supplied to the upper coil and the lower coil when the two electromagnetic valves are both opened and closed in the present embodiment.
- FIG. 22 shows that in this embodiment, when the # 1 solenoid valve is opened and closed and the # 2 solenoid valve is kept closed, the # 1 upper coil, # 1 lower coil, # 2 upper coil, and # 2 lower coil are supplied.
- FIG. 3 is a diagram showing a current waveform of an exciting current to be applied.
- FIG. 1 is a system configuration diagram of an electromagnetic valve driving device according to an embodiment of the present invention.
- the electromagnetic valve driving device of the present embodiment includes an electronic control unit (hereinafter, referred to as ECU) 10 and an electromagnetic valve 12.
- ECU 10 is connected to a crank position sensor (hereinafter referred to as CP sensor).
- CP sensor crank position sensor
- the CP sensor 14 is a sensor that outputs a reference signal and a crank angle signal.
- the reference signal is output each time the crank angle of the internal combustion engine matches a predetermined reference angle.
- the ECU 10 detects the crank angle of the internal combustion engine based on the output signal of the CP sensor 14 and controls the electromagnetic valve 12 using the detection result.
- the electromagnetic valve 12 includes a valve element 16.
- the electromagnetic valve 12 is applied to a 4-cylinder 4-valve internal combustion engine. That is, four solenoid valves 12 are provided for each cylinder of the internal combustion engine, of which the valve body 16 of two solenoid valves 12 constitutes an intake valve, and the valve of the other two solenoid valves 12 Body 16 constitutes the exhaust valve.
- the valve element 16 is disposed on the cylinder head 18 so as to be exposed in the combustion chamber of the internal combustion engine.
- An intake port (or exhaust port) 20 is provided in a cylinder head 18 of the internal combustion engine.
- the intake port (or exhaust port) 20 is provided with a valve seat 22 for the valve element 16.
- the intake port (or exhaust port) 20 becomes conductive when the valve body 16 is seated on the valve seat 22, and is shut off when the valve body 16 is seated on the valve seat 22. Becomes
- a valve shaft 24 is fixed to the valve body 16.
- the valve shaft 24 is held slidably in the axial direction by a valve guide 26.
- the valve guide 26 is supported by the cylinder head 18.
- a lower cap 28 of the solenoid valve 12 is fixed to the valve guide 26, and an armature shaft 30 made of a non-magnetic material is provided above the valve shaft 24.
- a lower retainer 32 is fixed to the upper end of the valve shaft 24.
- a lower spring 34 is disposed between the lower retainer 32 and the lower cap 28. The lower spring 34 urges the lower retainer 32, that is, the armature shaft 30 and the valve body 16 upward in FIG.
- an attachment 36 is fixed.
- an attachment 36 is fixed.
- the spring spring 38 urges the retainer 36, that is, the armature shaft 30 and the valve body 16 downward in FIG.
- a cylindrical aperture cap 40 is provided around the aperture spring 38.
- An adjustment bolt 42 is provided at the upper end of the Atsukyap 40. The upper end of the aperture spring 38 is in contact with the adjuster bolt 42.
- the armature 44 is joined to the machiya shaft 30.
- the armature 44 is an annular member made of a magnetic material.
- a first electromagnet 46 is provided above armature 44.
- the first electromagnetic stone 46 includes an upper coil 48 and an upper core 50.
- a second electromagnet 52 is disposed below the armature 44.
- the second electromagnet 52 includes a lower coil 54 and a lower core 56.
- the upper coil 48 and the lower coil 54 are connected to the ECU 10.
- An excitation current is supplied from the ECU 10 to the upper coil 48 and the mouth coil 54.
- the upper core 50 and the lower core 56 are members made of a magnetic material, and the armature shaft 30 is slidably held at a central portion thereof.
- the first electromagnet 46 and the second electromagnet 52 are held by the outer cylinder 58 so that a predetermined space is maintained between them.
- the neutral position of the armature 44 is adjusted to an intermediate point between the first electromagnet 46 and the second electromagnet by the azimuth bolt 42.
- a magnetic flux can be generated by the upper coil 48 by supplying an exciting current to the upper coil 48.
- the magnetic flux generated by the upper coil 48 flows through a path including the upper core 50 and the armature 44.
- an electromagnetic force is generated between the armature 44 and the first electromagnet 46 so as to attract the armature 44 to the first electromagnet 46.
- the electromagnetic valve 12 by supplying an appropriate excitation current to the upper coil 48, the armature 44, the armature shaft 30, the valve body 16, and the like are moved to the first electromagnet 46 side. Can be displaced.
- the armature shaft 30 can be displaced toward the first electromagnet 46 until the armature 44 comes into contact with the upper core 50.
- the valve element 16 closes the intake port (or exhaust port) 20 in a situation where the fermenter 44 contacts the upper core 50. Therefore, according to the electromagnetic valve 12, the valve body 16 can be fully closed by supplying an appropriate excitation current to the upper coil 48.
- the upper spring 38 and the lower spring 34 bias the armature shaft 30 toward the neutral position.
- the armature shaft 30 starts a simple vibration motion according to the spring force of the upper spring 38 and the lower spring 34.
- a magnetic flux can be generated by the lower coil 54 by supplying an exciting current to the lower coil 54.
- the magnetic flux generated by the aperture coil 54 flows through a path including the lower core 56 and the armature 44. At this time, an electromagnetic force is generated between the armature 44 and the second electromagnetic stone 52 so as to attract the armature 44 to the second electromagnet 52.
- the electromagnetically driven valve 12 by supplying an appropriate exciting current to the mouth coil 54, the energy loss caused by sliding of the armature shaft 30 is compensated, and the armature 44 becomes the second. electromagnet The armature shaft 30 can be displaced until it comes into contact with 52. The valve element 16 is fully opened when the armature 44 contacts the second electromagnet 52. Therefore, according to the electromagnetic valve 12, the supply of the excitation current to the upper coil 48 is stopped, and then the supply of the excitation current to the lower coil 54 is started at a predetermined timing, whereby the valve body 16 Can be changed from the fully closed state to the fully open state.
- valve body 16 When the supply of the exciting current to the lower coil 54 is stopped after the valve body 16 reaches the fully open state, the valve body 16 starts displacing toward the fully closed position in accordance with the operation of the simple vibration. Thereafter, the valve element 16 can be opened and closed by repeatedly supplying an exciting current to the fat coil 48 and the lower coil 54 at an appropriate timing.
- the armature 44 and the first electromagnet 46 or the second electromagnet 52 at the time when the armature 44 abuts on the first electromagnet 46 or the second electromagnet 52. If the electromagnetic suction force between the two can be used as a hole, the impact force acting between them can be reduced, and the generation of impact noise can be suppressed, and the durability of the electromagnetic valve 12 can be improved. it can. Further, in this case, the armature 44 can be quickly separated from the first electromagnet 46 or the second electromagnet 52, so that excellent responsiveness of the electromagnetic valve 12 can be realized. From this point of view, it is desirable that the electromagnetic attraction between the Ryoichi Matya 44 and the first electromagnet 46 or the second electromagnet 52 be quickly eliminated at a desired timing.
- FIG. 2 shows the current waveform (FIGS. 2 (a) and (b)) of the exciting current used in the electromagnetic valve 12 from the above viewpoint, and the displacement pattern of the valve element 16 obtained from the current waveform (FIG. Fig. 2 (c)) is shown.
- the exciting current supplied to the upper coil 48 is a suction period during which the valve body 16 is displaced from the fully open position to the fully closed position (periods A and B shown in FIG. 2 (a)).
- the transition period (see FIG. 2) is almost synchronized with the timing when the valve body 16 reaches the fully closed position.
- the current is controlled to be equal to the holding current IH (the period C shown in FIG. 2 (a)).
- the exciting current at the time a request to close the valve body 1 6 from the fully open position occurs, the maximum excitation current I MA X is controlled to demagnetizing current I R flowing in opposite directions (FIG. 2 (a )) Period D).
- the exciting current supplied to the lower coil 54 is the suction period during which the valve element 16 is displaced from the fully closed position to the fully open position (FIG. 2 (b) Period A and B)
- I MAX a predetermined value
- transition period (see FIG. 2 (b) in the period B shown) through to decrease toward Ke to a predetermined holding current IH (Period C shown in Fig. 2 (b)).
- this exciting current is required to close the valve body 1 6 from the fully open position is controlled in the demagnetizing current I R flowing in opposite directions at the Ji raw (period D shown in Figure 2 (b)).
- the electromagnetic valve 12 is opened and closed in synchronization with the operation of the internal combustion engine. It can be done.
- the current waveform of the excitation current supplied to the upper coil 48 and the lower coil 54 described above is such that the excitation current in the positive direction is supplied to the ECU 10 force S upper coil 48 and the mouth coil 54 as described later.
- This state is realized by appropriately switching between a state in which the excitation current is supplied and a state in which the exciting current is supplied in the opposite direction.
- the electromagnetic valve drive device of the present embodiment suppresses the number of switching means provided in the ECU 10 and reverses the direction of the excitation current supplied to the upper coil 48 and the lower coil 54, thereby achieving the above-described operation. It is characterized in that a desired current waveform as described above can be realized.
- FIG. 3 is a circuit diagram showing the internal structure of the ECU 10.
- ECU 10 includes CPU 60.
- An output port 68 and an input port 70 are connected to CPU 10 via a bus line 62.
- a CP sensor 14 is connected to the input port 70.
- the ECU 10 also includes a buffer circuit 72 and a drive circuit 74.
- the electromagnetic valve 12 constitutes an intake valve and an exhaust valve of a 4-cylinder 4-valve internal combustion engine. That is, each cylinder of the internal combustion engine is provided with two electromagnetic valves 12 that operate as intake valves and two electromagnetic valves 12 that operate as exhaust valves. ing.
- a total of eight sets of buffer circuits 72 and drive circuits correspond to a pair of intake valves provided in the same cylinder and a pair of intake valves provided in the same cylinder, respectively. 74 are provided.
- FIG. 3 corresponds to two solenoid valves 12 that constitute an intake valve, for example, provided in one cylinder. Only the buffer circuit 72 and the drive circuit 74 are shown.
- the drive circuit 74 has a power supply terminal 76 and a ground terminal 78.
- the power supply terminal 76 and the ground terminal 78 are connected to the power supply voltage line and the ground voltage line of the ECU 10, respectively. Therefore, the power supply terminal 76 is supplied with the power supply voltage V of ECU 10.
- another power supply other than ECU10 may be newly provided.
- the driving circuit 74 also includes nine field effect transistors (FET) that function as switching means, namely, # 1 FET 80, # 2 FET 82, # 3 FET 84, and # 4 FET 8 6, # 5 FET 88, # 6 FET 90, # 7 FET 92, # 8 FET 94, and # 9 FET 96.
- FET field effect transistors
- the drain terminals of # 1 FET 80, # 4 FET 86, and # 7 FET 92 are all connected to power supply terminal 76.
- the lower coil 5 4 of one of the solenoid valves 1 2 (hereinafter referred to as the # 1 solenoid valve 12) constituting the intake valve is connected.
- # 1 lower coil 54 Force Connected.
- # 2 electromagnetic valve 1 2 2 there is an upper coil 4 of the other electromagnetic valve 1 2 (hereinafter referred to as # 2 electromagnetic valve 1 2 2 ) constituting the intake valve. 8 (hereinafter, referred to as # 2 lower coils 4 8 2) is connected.
- the source terminals of # 1 FET 80, # 4 FET 86, and # 7 FET 92 are connected to the drain terminals of # 2 FET 82, # 5 FET 88, and # 8 FET 94, respectively. ing.
- the # 1 solenoid valve is connected between the # 2 FET 82's tooth terminal and the # 5 FET 88's source terminal.
- 1 2-, upper coil 48 (hereinafter referred to as # 1 coil 48) is connected.
- # 5 F ET 8 8 RoRyoko I le 5 4 of the second solenoid valve 1 2 2 between the source terminal of the source terminal and the # 8 FET 9 4 (hereinafter, # 2 lower coils 5 4 - 2 ) are connected.
- the source terminals of # 2 FET 8 2 # 5 FET 88 and # 8 FET 94 are connected to the drain terminals of # 3 FET 84, # 6 FET 90 and # 9 FET 96, respectively. It is connected.
- the source terminals of # 3FET84, # 6FET90, and # 9FET96 are all connected to the ground terminal 78.
- the gate terminals of # 1 FET 80 # 9 FET 96 are connected to the above-described buffer circuits 72, respectively.
- the buffer circuit 72 supplies a high-level or single-level drive signal to each gate terminal of the # 1 FET 80 # 9 FET 96 according to a finger signal from the CPU 60.
- the # 1 FET 80 # 9 FET 96 is turned on when a high-level signal is supplied from the buffer circuit 72 to each gate terminal. Also, the # 1 FET 80 # 9 FET 96 is turned off when a low-level signal is supplied from the buffer circuit 72 to each gate terminal.
- Each of the # 1 FET 80 # 9 FET 96 includes internal diodes that allow current flow from the tooth terminal to the drain terminal. Therefore, the # 1 FET 80 # 9 FET 96 allows the flow of current in the direction from the source terminal side to the gate terminal side (that is, upward in FIG. 3) even in the off state.
- the two intake valves of each cylinder are basically opened and closed together at the same timing.
- one of the intake valves is kept closed and only the other intake valve is opened and closed from the viewpoint of improving fuel efficiency.
- the exhaust valves are basically opened and closed at the same timing as each other. Depending on the operating state of the Seki, one exhaust valve may be kept closed and only the other exhaust valve may be opened and closed.
- FIG. 2 (a) and (b) the excitation current # 1 solenoid valve of the waveform shown in 1 2 -, and # 2 electromagnetic valve 1 2 2 About operating state of the ECU 1 0 realized supplied Subeku be described.
- Figures 4 to 7 show # 1 upper coil 4 8 and # 2 upper coil 4
- FIG. 8 - 2 shows the three operating states of the ECU 1 0 realized to supply exciting current of the current pattern shown in FIG. 2 (a).
- the turned-on FETs are marked with a triangle.
- the state shown in Figure 4 is for the # 1 FET 80, # 2 FET 82, # 4 FET 86, # 6 FET 90, # 8 FET 94, and # 9 FET 9 This is realized by turning on 6 and turning off the other FETs.
- the circuit from the power supply terminal 76 to the ground terminal 78 via the # 1 FET 80, # 2 FET 82, # 1 upper coil 48-, and # 6 FET 90 is conducted. You. For this reason, the # 1 upper coil 48-, has a direction from the # 2 FET 82 side to the # 6 FET 90 side (rightward in Fig. 4; hereinafter, this direction is referred to as the positive direction of the # 1 upper coil 48-, ) Is supplied.
- a state in which a positive exciting current is supplied to the coil is referred to as a power supply state of the coil.
- the power supply terminal 7 six et # 4 FET 8 6, # 2 Atsupakoiru 4 8 - 2, # 8 FET 9 4, ⁇ Beauty, grounded via the # 9 FET 9 6 terminal ⁇
- the circuit leading to 8 is conducted.
- # 2 Atsupakoiru 4 8- to 2 # 4 right in the orientation (FIG. 4 directed from FET 8 6 side to # 8 FET 9 4 side; hereinafter, the positive direction of the direction # 2 Atsupakoiru 4 8 2 ) Is supplied. That is, # 2 Ryo Tsubakoiru 4 8 - Power supply form also 2 State.
- the magnitude of the current flowing through the coil matches the above-mentioned maximum excitation current I MAX.
- the # 1 lower coil 54 is short-circuited at both ends by the # 1 FET 80 and # 4 FET 86 that are turned on.
- the exciting current flowing through the lower coil 54 is substantially zero.
- # 2 lower coils 5 4 - 2 Similarly for the both ends, since that would be short-circuited by the # 6 FET 9 0 and # 9 FET 9 6 is turned on, the exciting current flowing substantially Is zero.
- the maximum excitation current I MAX supplied to the # 1 upper coil 48 flows through the # 1 FET 80, # 2 FET 82, and # 6 FET 90. and, # 2 Atsupakoiru 4 8 - maximum exciting current I MAX which is subjected fed into two flows # 4 FET 8 6, # 8 FET 9 4, and # 9 F ET 9 6. That is, since no circulating the maximum exciting current I MAX identical FET supplied to # 1 Atsupakoiru 4 8 and # 2 Atsupakoiru 4 8 2, it is possible to suppress heat generation in each FET.
- the state shown in FIG. 5 is realized by turning on the # 1 FET 80 and # 2 FET 82 of the drive circuit 74 and turning off the other FETs.
- the # 1 F ET 8 0, # 2 F ET 8 2 the internal diode of the first Atsupakoiru 4 8- ,, # 5 F ET 8 8, second Atsupakoiru 4 8 - 2, and # 7
- the closed circuit returning to # 1 FET 80 via the internal diode of FET 92 is conducted.
- # 1 coil 4 8-! And # 2 g 4 8 - direction of the second positive-direction current is coincident with the direction of the closed circuit. Therefore, by switching the state shown in FIG. 5 from a power supply state shown in FIG.
- # 2 Ryo Tsubakoiru 4 8 - 2 and via the internal Daio de of # 7 F ET 9 2 returns to # 4 F ET 8 6 closed circuit is conducting.
- # 1 Atsupako I le 4 8 -, and # 2 Appakoiru 4 8 - direction of the second positive-direction current is coincident with the direction of these closed circuit. Therefore, even if the state smell shown in FIG. 6, similar to the state shown in FIG. 5, # 1 Atsupakoiru 4 8 and # 2 Atsupakoiru 4 8 2 are both a flywheel state.
- the state shown in FIG. 7 is realized by turning on # 3FET84, # 5FET88, and # 7FET92, and turning off the other FETs. In this state, the power terminals 76 to # 7 F E T 92,
- Atsupakoiru 4 8 and # 2 Atsupakoi g 4 8 - can be supplied to reverse demagnetizing current I R 2.
- the state in which the current associated with the back electromotive force of the coil is recovered as regenerative energy on the power supply side, or the state in which the exciting current is supplied in the reverse direction is referred to as the regenerative / reverse current state of the coil.
- # 1 Atsupakoiru 4 8 and # 2 Atsupakoiru 4 8 - 2 is a power supply state is in the state shown in FIG. 4, in the shown to state in FIG. 5 or FIG. 6 is a flywheel state, Figure 7 In the state shown, it is a regeneration-reverse current state.
- ECU 1 in the period between A shown in FIG. 2 (a), # 1 Appako I le 4 8 and # 2 Atsupakoiru 4 8 by realizing the state shown in FIG. 4 - 2 up exciting current I MAX
- the # 1 upper coil 48 and the # 2 upper coil 4 can be supplied.
- ECU 1 0 force 'by implementing appropriately switched to the state shown in FIG. 4 to FIG. 7, # 1 Atsupako I le 4 8 and # 2 Atsupakoiru 4 8 - 2
- the excitation current supplied to the motor can be controlled according to the waveforms shown in Figs. 2 (a) and (b).
- # 1 the lower coils 5 4 forward direction # 4 F ET 8 direction from 6 side toward # 2 FET 8 2 side (in the figure left) and for the positive direction of the # 2 necked Ako I le 5 4-2 Is the direction from the # 8 FET 94 side to the # 6 FET 90 side (leftward in the figure).
- # 1 lower coil 5 4—! And # 2 lower coil 5 4 - 2 may be a flywheel Ichiru Fukutai.
- # 1 FET 8 0 # 5 FET 8 8 corresponds to the state shown in FIG. 7, and # 9 FET 9 6 turned on, regenerated # 1 lower coil 5 4 and # 2 lower coil 5 4 2 ⁇ Can be in reverse current state.
- one of the intake valves in the same cylinder e.g. # 2 electromagnetic valve 1 2 - 2
- the other intake valve for example, # 1 Electromagnetic valves 1 2 -
- # 1 upper coil 48 and # 1 ⁇ coil 5 4- the # 1 electromagnetic valve 12 is opened and closed by supplying an exciting current having a current waveform similar to the waveforms shown in Figs. 2 (a) and (b).
- # exciting current supplied to the 2 Atsupakoiru 4 8 2 is kept equal magnitude to the holding current the IH, # 2 lower coils 5 4 - is supplied to the 2 By setting the exciting current to zero,
- # 2 solenoid valve 1 2 2 is kept closed. However, # 1 mediation Pakoiru 4 8 or # 1 lower coils 5 4 -, demagnetizing current I R is immediately before being supplied, the excitation current supplied to the # 2 Atsupakoiru 4 8 2 is temporarily increased. The reason will be described later.
- the current waveform shown in FIG. 8 can be realized by appropriately switching the states shown in FIGS. 9 to 16 in addition to the states shown in FIG. 4, FIG. 5, or FIG.
- the exciting current is supplied to the # 1 upper coil 48 (periods A, B, C, and D shown in FIG. 8A) will be described.
- the current waveforms in periods A, B, and C.D shown in Fig. 8 (a) are realized by appropriately switching the states shown in Figs. 9 to 11 in addition to the states shown in Fig. 4, 5, or 6. Is done.
- # 6 The circuit reaching the ground terminal 78 via the FET 90 is conducted. Therefore, the maximum excitation current I MAX in the positive direction is supplied to the # 1 upper coil 48 from the power supply terminal 76. That is, the # 1 upper coil 48 is set to the power supply state. Further, in the state shown in FIG. 9, # 4 FET 8 6, # 2 Atsupakoiru 4 8 - 2, and a closed circuit via the internal da Io de returns to # 4 FET 8 6 of # 7 FET 9 2 become conductive You. For this reason, it is Rukoto was circulated flywheel current to # 2 Appakoiru 4 8 2. That is, # 2 Atsupakoiru 4 8 - 2 is a Furaiho I Ichiru state. The state shown in Figure 10 is achieved by turning on # 4 FET 86, # 6 FET 90, # 8 FET 94, and # 9 FET 96, and turning off the other FETs. . In this state, # 6 FET 90,
- # 1 The upper coil 4 8 is in the flywheel state. Further, in the state shown in FIG. 1 0, # 4 FET 8 6 from the power supply terminal 7 6, # 2 mediation Pakoiru 4 8 - 2, # 8 FET 9 4, and # 9 FET 9 6 ground terminal 7 8 via Are conducted. Thus, # 2 Atsupakoi g 4 8 - 2 is a power supply state.
- the down state shown in FIG. 11 is realized by turning on # 3FET84, # 4FET86, and # 5FET88.
- the circuit from the power supply terminal 76 to the ground terminal # 8 via the # 4 FET 86, # 5 FET 88, # 1 upper coil 48-, and # 3 FET 84 is conducted. . Therefore, the # 1 upper coil is in a regenerative 'reverse current state'.
- # 4 F E T 86 In the state shown in Fig. 11, # 4 F E T 86,
- Atsupakoiru 4 8 - 2 is the flywheel state.
- FIGS. 4, 5 in the state shown in FIG. 9, and FIG. 1 0, for # 1 Atsupakoiru 4 8 and # 2 Atsupakoiru 4 8 2 All combinations of the power supply state and the flywheel lying state are realized. Further, in the state shown in FIG. 1 1, # 2 Atsupakoiru 4 8 - # 1 Atsupakoiru 4 8 with flywheel flows into 2 - is the Gyakukata direction current is supplied. Therefore, the exciting current supplied to the # 1 upper coil 48 is slightly reduced toward the holding current I at a desired gradient, while
- # 1 the lower coils 5 4 and # 2 Atsupakoiru 4 8 - 2 are both a power supply state.
- the state shown in FIG. 13 is realized by turning on the # 2FET 82, # 3FET84, and # 4FET86 and turning off the other FETs. In this state, the circuit from the power supply terminal 76 to the grounding terminal 78 via the # 4 FET 86, # 1 lower coil 54-, # 2 FET 82 and # 3 FET 84 is connected. Conducted. Therefore, the # 1 lower coil 5 4-! Is in the power supply state. Further, in the state shown in FIG.
- # 4 FET 8 6, # 2 Atsupakoiru 4 8 - 2, and # 7 are rendered conductive closed circuit back to # 4 FET 8 6 via the internal Daiodo of FET 9 2 You.
- # 2 Atsupakoiru 4 8 - 2 is the flywheel state.
- the state shown in FIG. 14 is realized by turning on the # 4FET86, # 8FET94, and # 9FET96, and turning off the other FETs.
- the closed circuit returning to the # 4 FET 86 via the # 4 FET 86, # 1 lower coil and # 1 FET 80 internal diode is conducted. Therefore, the # 1 lower coil 5 4—, is in a flywheel state.
- the circuit reaching the ground terminal 78 via the FET 94 and # 9 FET 96 is conducted. Therefore # 2 Atsupakoiru 4 8 - 2 is a power supply state.
- the state shown in FIG. 15 is realized by turning on only # 4 FET 86 and turning off the other FETs. In this state,
- the # 1 FET 80, # 5 FET 88, # 6 FET 90, # 8 FET 94, and # 9 FET 96 are turned on, and the other F This is realized by turning off the ET.
- the circuit from the power supply terminal 76 to the ground terminal 78 via the # 1 FET 80, # 1 lower coil 54, # 5 FET 88, and # 6 FET 90 is conducted. . Therefore, the # 1 lower coil 54 is in a regenerative 'reverse current state'. Further, in the state shown in FIG.
- # 6 FET 9 0 # 5 FET 8 8, # 2 Atsupakoiru 4 8- 2, # 8 FET 9 4, and # 9 by way of the FET 9 6 # 6 FET 9
- # 2 Atsupakoiru 4 8 2 are Furaihoiru state.
- # 1 the lower coils 5 4 and # 2 Atsupakoiru 4 8 - 2 are both a power supply state
- # 1 lower coils 5 4 Power whereas the supply state
- # 2 Atsupakoiru 4 8 - 2 is the flywheel state.
- FIG. 1 2, # 2 Atsupako I le 4 8 - Figure 2 exciting current supplied to be switched so as to maintain the holding current the IH 8 (b ), The current waveform in period A can be realized.
- # 2 Atsupakoiru 4 8 2 is the # 1 lower coils 5 4 regenerative-reverse current state with are Furaiho Iru Fukutai.
- # 1 the lower coil exciting current supplied to the 5 4 decreases toward the holding current IH at a desired slope, while the # 2 Atsupako I le 4 8 - holding two exciting current supplied to the holding current IH
- the current waveform in the period B shown in Fig. 8 (b) can be realized by switching the above five states. Further, in the period between the C shown in FIG. 8 (b), both # 1 lower coils 5 4 and # 2 Atsupakoiru 4 8 2 to the exciting current to be supplied sheet is held by the holding current IH. Therefore, by switching between the state shown in FIG. 12 and the state shown in FIG. 15, the current waveform in the period C shown in FIG. 8A can be realized.
- # 2 solenoid valve 1 2 -2 is kept closed and # 1 solenoid valve 1 2-! Is opened and closed has been described, but # 1 solenoid valve 1 2-, is closed.
- # 2 electromagnetic valve 1 2 - 2 may be the opening and closing drive.
- the FETs that are point-symmetric with respect to the FETs that were turned on in the states shown in FIGS. 9 to 16 correspond to the states shown in FIGS. 9 to 16 by turning them on. Can be realized.
- # 1 FET 80, # 2 FET 82, # 4 FET 86, and # 6 FET 90 that were turned on in the state shown in Fig. 9, respectively.
- # 9 F ET 96, # 8 FET 94, # 6 FET 90, and # 4 FET 86 the # 1 upper coil 4 8 is set to the flywheel state, and # 2 the Atsupakoiru 4 8 2 can be a power supply state.
- # 2 Atsupa coil 4 8 - 2 was the flywheel state
- the # 1 upper coil 48 is set to the flywheel state, and the # 2 lower coil 5 4 2 Can be in a regenerative / reverse current state.
- # 2 electromagnetic valve i 2 - as in the case 2 for opening and closing the holding quality one # 1 solenoid valve 1 2 in a closed state, each corresponding to the state shown in FIGS. 9 1 6
- the # 2 upper coil 4 8 is maintained while the excitation current supplied to the # 1 upper coil 48 is maintained at the holding current IH (that is, while the # 1 solenoid valve 12 is kept closed).
- - 2 and # 2 lower coil 5 4 2 in FIG. 8 (a) it may be opening and closing the (b) and by supplying the exciting current of a waveform similar to # 2 electromagnetic valve 1 2-2.
- # 1 Atsupakoiru 4 8, # 1 the lower coils 5 4, # 2 Atsupakoiru 4 8 2, and # 2 lower coil 5 4 - respectively 2 to be supplied to both normal and reverse directions of the current
- the exciting current supplied to each coil can be controlled according to the current pattern shown in FIG. 3 or FIG.
- the electromagnetic valve control device of the present embodiment the armature 44 and the first electromagnet 4 at the time when the armature 44 contacts the first electromagnet 46 or the second electromagnet 52.
- the electromagnetic attraction force acting between the second electromagnet 6 and the second electromagnet 52 can be quickly eliminated.
- the durability of the electromagnetic valve 12 can be improved, and the high response of the electromagnetic valve 12 can be realized.
- This is realized by configuring one drive circuit 74 for a total of four electromagnetic coils included in two electromagnetic valves constituting an intake valve or an exhaust valve.
- the exciting current supplied to these four electromagnetic coils can be controlled by nine switching means, that is, # 1 FET 80 to # 9 FET 96.
- one electromagnetic coil is controlled by an H-type bridge circuit as in the above-described conventional technology, 16 switching means are required for four electromagnetic coils. Therefore, when the conventional configuration is applied to a four-cylinder four-valve internal combustion engine, a total of 128 switching means are required, whereas according to the present embodiment, 72 switching means are required. The switching means is sufficient.
- the FETs 80 to 96 which are switching means, collectively for the electromagnetic valves 12 that are opened and closed in synchronization with each other. It is possible to realize the above-mentioned performance while greatly reducing the number of switching means as compared with the related art.
- the electromagnetic valve drive device of the present embodiment is realized by using the ECU 110 in place of the ECU 10 in the control device for the electromagnetic valve of the first embodiment.
- 2 is a circuit diagram showing an internal configuration of the ECU 110 of FIG.
- the same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted or simplified.
- the ECU 110 includes a drive circuit 174.
- the drive circuit 174 is realized by using a diode 188 instead of the # 5 FET 88 in the drive circuit 74 of the above embodiment.
- Diode 1 8 Reference numeral 8 is arranged so as to allow a current to flow from the ground terminal 78 to the power supply terminal 76.
- FIG. 18 shows a state corresponding to FIG. 7 in this embodiment.
- the state shown in Fig. 18 is realized by turning off all FETs.
- FIG. 19 shows a state corresponding to FIG. 11 in this embodiment.
- the state shown in Fig. 19 is realized by turning on # 4 FET 86 and turning off the other FETs.
- # 4 FET 8 6 # 2 Atsupakoiru 4 8 - 2
- # 2 Atsupakoiru 4 8 - 2 is a hula Ihoiru state.
- the ground terminal 78 is connected to the power supply terminal 76 via the # 3 FET 84, # 1 upper coil 48-, diode 188, and # 4 FET 86.
- the circuit leading to it is conducted. Therefore, when the back electromotive force of the # 1 upper coil 48 is larger than the power supply voltage, the current flowing through the # 1 upper coil 48 is supplied to the power supply side as regenerative energy as in the state shown in Fig. 11. Can be recovered.
- the diode 1 88 prevents the flow of current from the # 4 FET 86 side to the # 1 aper coil 48-, side. Even if it is turned on, the reverse current cannot be supplied to the # 1 upper coil 48-. That is, in the state shown in FIG. 19, the # 1 upper coil 48 is in the regenerating state regardless of whether the # 3 FET 84 is on or off.
- FIG. 20 shows a state corresponding to FIG. 16 in the present embodiment.
- the state shown in FIG. 20 is realized by turning on the # 8 FET 94 and the # 9 FET 96 and turning off the other FETs.
- # 8 FET 94, # 9 FE T 9 6, # 6 FET 9 0 internal diodes, diode 1 8 8, ⁇ Beauty # 2 Atsupakoiru 4 8 - 2 via the return to # 8 FET 9 4 closed circuit is conducting.
- # 2 Atsupakoiru 4 8 2 is a flywheel one Le state.
- the # 1 lower coil is in the regenerative state regardless of whether the # 1 FET 80 and the # 6 FET 90 are on or off.
- # 1 Atsupakoiru 4 8, # 1 Roakoiru 5 4 -, # 2 Atsupakoiru 4 8 2, and # 2 Roako I le 5 4 - opposite to the second one of the electromagnetic Koiru can not it to provide a direction of the demagnetizing current I R.
- a voltage in the opposite direction is applied to these electromagnetic coils, and the current flowing through the electromagnetic coils can be recovered as regenerative energy to the power supply side. Therefore, by realizing the states shown in FIGS.
- Figure 2 1 is # 1 solenoid valve 1 2 and # 2 electromagnetic valve 1 2 - in the case of synchronously driving the 2 to each other physician shows a current waveform of the exciting current supplied to Atsupakoiru 4 8 and lower coils 5 4.
- the current waveforms in the periods A, B, and C shown in FIG. 21 (a) are the same as those in the first embodiment described above, in the states corresponding to FIG. 4, and FIG. 5 or FIG. 6, and in FIG. State It can be realized by switching appropriately.
- the current waveform shown in Fig. 21 (b) shows the state in which the FET that is turned on in the state corresponding to Figs. This can be realized by appropriately switching the state shown in FIG. 18 (in the state shown in FIG. 18, all FETs are in the OFF state, and are commonly used for the upper coil 48 and the lower coil 54).
- the exciting current supplied to the upper coil 48 becomes the predetermined value IH.
- the exciting current never becomes negative in the period D after the held period C has passed.
- the current flowing through the upper coil 48 is recovered as regenerative energy at the power supply side, and thereby the excitation current quickly converges to zero. It can be done.
- the exciting current flowing through the lower coil 54 can be quickly converged to zero. it can.
- Figure 2 2 shows that when # 2 solenoid valve 1 2 — 2 is kept closed and only # 1 solenoid valve 1 2 is opened and closed, # 1 end tupa coil 4 8-, # 1 lower coil 5 4, and # 2 Atsupakoiru 4 8 - shows a 2 to supply magnetizing current of the current waveform.
- the current waveforms correspond to the states shown in FIGS. 4 and 5 or FIGS. 6, 9, 10, and FIGS. 12 to 15, respectively. This can be realized by appropriately switching each state shown in FIG. 19 corresponding to 11 and FIG. 20 corresponding to FIG. In the current waveform shown in FIG. 22 as well, by realizing the state shown in FIG. 19 or FIG.
- the effect is inferior to the extent that the reverse current is not supplied to the electromagnetic coil, but the plunger 44 touches the first electromagnet 46 or the second electromagnet 52. Later, the electromagnetic attraction acting between the two can be quickly eliminated.
- the driving circuit 174 of the present embodiment is realized by using a relatively inexpensive diode 188 instead of the # 5 FET 88 of the first embodiment. Therefore, in the present embodiment, it is possible to realize a control device for an electromagnetic valve having the above performance while further reducing the cost of the device.
- the present invention is not limited to this. It can also be applied to an internal combustion engine with two intake valves and one exhaust valve. In this case, by applying the above configuration only to the intake valve, it is possible to reduce the number of switching means for driving the intake valve.
- the same drive circuit 74 According to 174, the electromagnetic valve 12 corresponding to the exhaust valve or the intake valve in the same cylinder was driven. However, as described above, by the same driving circuit 7 4, 1 7 4, # 1 solenoid valve 1 2 and # 2 electromagnetic valve 1 2 - 2 of only one on-off driving, even Rukoto to closed valve maintaining the other It is possible.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve Device For Special Equipments (AREA)
- Magnetically Actuated Valves (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/581,012 US6276318B1 (en) | 1997-12-08 | 1998-12-07 | Solenoid valve actuating apparatus |
EP98957212A EP1036964A4 (en) | 1997-12-08 | 1998-12-07 | DEVICE FOR CONTROLLING AN ELECTROMAGNETIC VALVE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9/337402 | 1997-12-08 | ||
JP33740297A JP3550989B2 (ja) | 1997-12-08 | 1997-12-08 | 電磁バルブ用駆動装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999030068A1 true WO1999030068A1 (fr) | 1999-06-17 |
Family
ID=18308303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1998/005528 WO1999030068A1 (fr) | 1997-12-08 | 1998-12-07 | Dispositif de commande d'electrovanne |
Country Status (5)
Country | Link |
---|---|
US (1) | US6276318B1 (ja) |
EP (1) | EP1036964A4 (ja) |
JP (1) | JP3550989B2 (ja) |
KR (1) | KR100380265B1 (ja) |
WO (1) | WO1999030068A1 (ja) |
Cited By (2)
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EP1146217A2 (de) * | 2000-04-12 | 2001-10-17 | Bayerische Motoren Werke Aktiengesellschaft | Schaltungsanordnung zum Betrieb eines hochdynamischen elektromagnetischen Hubanker-Aktors |
EP1106808A3 (en) * | 1999-12-07 | 2003-03-19 | Toyota Jidosha Kabushiki Kaisha | Electromagnetic valve drive apparatus of internal combustion engine |
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JP2001349462A (ja) * | 2000-06-08 | 2001-12-21 | Honda Motor Co Ltd | バルブ駆動装置 |
JP2002231530A (ja) * | 2001-02-07 | 2002-08-16 | Honda Motor Co Ltd | 電磁アクチュエータ制御装置 |
US6685160B2 (en) * | 2001-07-30 | 2004-02-03 | Caterpillar Inc | Dual solenoid latching actuator and method of using same |
DE10148403A1 (de) * | 2001-09-29 | 2003-04-17 | Fev Motorentech Gmbh | Verfahren zur Steuerung eines elektromagnetischen Ventiltriebs durch Änderung der Stromrichtung bei der Bestromung der Elektromagneten |
JP3820960B2 (ja) * | 2001-10-26 | 2006-09-13 | トヨタ自動車株式会社 | 電磁駆動弁の脱調検出を伴う通電制御方法 |
DE10251034A1 (de) * | 2002-11-02 | 2004-05-19 | Robert Bosch Gmbh | Anordnungen zum ansteuerbaren Versorgen von Magnetventilen einer elektrohydraulischen Ventilsteuerung |
US6971346B2 (en) * | 2004-03-18 | 2005-12-06 | Ford Global Technologies, Llc | System for controlling electromechanical valves in an engine |
US8037853B2 (en) * | 2005-04-19 | 2011-10-18 | Len Development Services Usa, Llc | Internal combustion engine with electronic valve actuators and control system therefor |
US7270093B2 (en) * | 2005-04-19 | 2007-09-18 | Len Development Services Corp. | Internal combustion engine with electronic valve actuators and control system therefor |
CN1908386A (zh) | 2005-08-02 | 2007-02-07 | 丰田自动车株式会社 | 电磁驱动阀 |
JP2007046497A (ja) * | 2005-08-08 | 2007-02-22 | Toyota Motor Corp | 電磁駆動弁 |
JP2007046498A (ja) | 2005-08-08 | 2007-02-22 | Toyota Motor Corp | 電磁駆動弁 |
JP2007046503A (ja) | 2005-08-08 | 2007-02-22 | Toyota Motor Corp | 電磁駆動弁 |
TWI342661B (en) * | 2007-05-11 | 2011-05-21 | Delta Electronics Inc | Control circuit of sensorless motor and control method thereof |
DE102011104382A1 (de) * | 2011-06-16 | 2012-12-20 | Daimler Ag | Brennkraftmaschinenventiltriebvorrichtung für ein Kraftfahrzeug |
FR3068728B1 (fr) * | 2017-07-10 | 2019-08-02 | Psa Automobiles Sa | Procede de pilotage electronique d’actionneurs de soupapes d’un moteur thermique |
CN108895190B (zh) * | 2018-08-15 | 2023-10-03 | 中山市铧禧电子科技有限公司 | 兼容多种比例阀的控制驱动电路 |
GB202005894D0 (en) * | 2020-04-22 | 2020-06-03 | Wastling Michael | Fast-acting toggling armature uses centring spring |
US20230127691A1 (en) * | 2021-10-21 | 2023-04-27 | Kenneth Schulz | Electronic Valve Train Assembly |
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- 1998-12-07 KR KR10-2000-7006171A patent/KR100380265B1/ko not_active IP Right Cessation
- 1998-12-07 WO PCT/JP1998/005528 patent/WO1999030068A1/ja active IP Right Grant
- 1998-12-07 EP EP98957212A patent/EP1036964A4/en not_active Withdrawn
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1106808A3 (en) * | 1999-12-07 | 2003-03-19 | Toyota Jidosha Kabushiki Kaisha | Electromagnetic valve drive apparatus of internal combustion engine |
US6626146B1 (en) | 1999-12-07 | 2003-09-30 | Toyota Jidosha Kabushiki Kaisha | Electromagnetic valve drive apparatus of internal combustion engine |
EP1146217A2 (de) * | 2000-04-12 | 2001-10-17 | Bayerische Motoren Werke Aktiengesellschaft | Schaltungsanordnung zum Betrieb eines hochdynamischen elektromagnetischen Hubanker-Aktors |
EP1146217A3 (de) * | 2000-04-12 | 2003-03-19 | Bayerische Motoren Werke Aktiengesellschaft | Schaltungsanordnung zum Betrieb eines hochdynamischen elektromagnetischen Hubanker-Aktors |
Also Published As
Publication number | Publication date |
---|---|
EP1036964A1 (en) | 2000-09-20 |
US6276318B1 (en) | 2001-08-21 |
JPH11166657A (ja) | 1999-06-22 |
KR20010032844A (ko) | 2001-04-25 |
EP1036964A4 (en) | 2009-06-17 |
KR100380265B1 (ko) | 2003-04-18 |
JP3550989B2 (ja) | 2004-08-04 |
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