JPH1089029A - Electromagnetic valve device, its driving device, and internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately perform variable control of a valve lifting amount by providing an electromagnet moving means for moving an open electromagnet for driving a movable piece for opening/closing a valve in a valve opening/ closing direction and seating and fixing the movable piece in the open electromagnet. SOLUTION: For running an engine by opening/closing a solenoid valve device with a small valve lifting amount, an open electromagnet 4 is positioned in a high place so as to limit the reciprocating amount of a movable piece 3 small. Also the static balance position of the movable piece 3 decided by a balance of force between first and second springs 6 and 7 is set in the vicinity of a center between the open electromagnet 4 and a closed electromagnet 5. Then, by controlling driving power for four open electromagnet driving parts 18a, 18b,..., and four first spring driving parts 23a, 23b,..., by a controller during engine running, first spring supporting members 22a, 22b,..., and open electromagnet movable piece 17a, 17b,..., are drawn in, driving power for the open electromagnet 4 and the closed electromagnet 5 is controlled and thereby a valve 1 is opened/closed via the movable piece 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic valve device for intake and exhaust of an internal combustion engine, a driving device thereof, and an internal combustion engine using the electromagnetic valve device. About.

[0002]

[Prior art]

(Basic Configuration of Internal Combustion Engine) Internal Combustion Engine (Engine) for Automobiles
Is provided with an intake valve, an exhaust valve, a valve driving device, a piston, a cylinder, a spark plug, a throttle valve, and the like, and generates a rotational force by repeating each process of intake, compression, combustion, and exhaust.

[0003] In the intake stroke, the piston moves from top dead center to bottom dead center with the valve drive device closing the exhaust valve and opening the intake valve. As a result, the pressure in the cylinder decreases, and a mixture of gasoline and air is sucked into the cylinder.

In the compression stroke, the piston moves from near the bottom dead center to the top dead center to compress the air-fuel mixture in the cylinder with the valve drive device closing the exhaust valve and the intake valve.

[0005] In the combustion stroke, the air-fuel mixture compressed in the cylinder is ignited by a spark plug with the exhaust valve and the intake valve closed by the valve drive device. The ignited air-fuel mixture burns and expands, causing the piston to move from the vicinity of the top dead center toward the bottom dead center by the pressure of the high-pressure gas to generate rotational force.

[0006] In the exhaust stroke, when the intake valve is closed and the exhaust valve is opened by the valve driving device, the piston moves from the vicinity of the bottom dead center toward the top dead center, thereby causing the expanded combustion gas in the cylinder. To discharge.

As valve drive devices for opening and closing the intake valves and exhaust valves (hereinafter referred to as valves) of the engine as described above, a large number of electromagnetically driven valve devices for opening and closing these valves using electromagnetic force have been proposed. Have been.
These electromagnetic valve devices generate a mover mechanically coupled to a valve shaft, an electromagnet for attracting and moving the mover to open and close, and an auxiliary force for driving the mover to open and close. And a spring. The following are required for these electromagnetic valve devices.

(Necessity of Variable Valve Lift) (1) Throttleless Support Normally, in order to control the output of an engine, the intake air flow into the cylinder is adjusted by a throttle valve provided upstream of the intake valve. doing. If the lift amount (meaning the opening amount) of the intake valve can be changed,
It is possible to adjust the amount of intake air into the cylinder without using a throttle valve. This eliminates the need for a throttle valve mechanism, simplifies the structure of the intake system, and can reduce the cost of the engine. For this reason, it is required that the valve lift amount of the valve by the valve driving device can be accurately variably controlled.

(2) Lean Burn Compatible In order to reduce the fuel consumption of the engine, lean-burn engines have begun to be put into practical use. Many engines are
Two intake valves are provided for each cylinder.
When performing lean combustion, the lift amount of one of the two intake valves is reduced. As a result, swirl is generated in the cylinder and the mixing of fuel and air is promoted, so that a stable combustion state can be obtained even if the amount of fuel is reduced. In order to cope with such a lean burn engine, these electromagnetic valve devices are required to be able to accurately and variably control the valve lift amount.

(Equilibrium point of spring must be at the center between valve open position and valve closed position) Electromagnetically driven valve device for opening and closing the valve by attracting a movable element mechanically coupled to the valve with an electromagnet Then, if the distance between the mover and the electromagnet is wide, it is difficult to generate a large electromagnetic force with a small electromagnet, so that the opening and closing drive of the valve becomes difficult. Therefore, it is necessary to open and close the valve by utilizing the spring force acting on the mover. It is desirable that the spring force used when opening the valve is equal to the spring force used when closing the valve. Therefore, during the operation of the engine, the balanced position of the valve due to the spring force is required to be near the center between the open position and the closed position.

(When power is cut off, the valve must be equilibrated by the spring force near the closed position just before the engine is started.) (1) When the engine is started: The valve is equilibrated by the spring force immediately before the engine is started. , Near the closed position. This is because, assuming that the balanced position of the valve due to the force of the spring is near the center between the open position and the closed position, it is necessary to drive the valve to the initial position against the force of the spring only by the electromagnetic force. However, in such an assumed state, it is difficult to generate a large electromagnetic force due to the large gap between the mover and the electromagnet, and there is a possibility that the valve cannot be driven toward the initial position.

(2) At the time of power interruption It is considered that the supply of electric power to the electromagnetic valve device is interrupted during the operation of the engine due to a trouble such as a charging system of the vehicle. At this time, if the valve is in the open position and greatly protrudes into the cylinder, the piston during the coasting motion may collide with the valve. In order to avoid such a situation, when power is not supplied to the electromagnetic valve device, the equilibrium position of the valve due to the force of the spring is:
It is required to be near the closed position.

(Necessity of Shock Mitigation) Since quietness is required for the engine of an automobile, even in the electromagnetic valve device, the shock when the movable element for opening and closing the valve is seated on the electromagnet is reduced, and the noise is reduced. It is required to minimize the occurrence.

(Specific Example of Prior Art) As described above,
First, the electromagnetically driven valve device can accurately and variably control the valve lift amount. Second, when the engine is operating, the balanced position of the valve due to the force of the spring is near the center between the open position and the closed position. Third, when power is not supplied to the electromagnetic valve device, the valve is equilibrated by the force of the spring near the closed position. Fourth, the impact generated when the mover is seated on the electromagnet. It is required that the sound be low.

As a conventional technique for satisfying a part of such a demand, an electromagnetically driven type disclosed in JP-A-61-237810, JP-A-3-242409 and JP-A-4-66706 is known. A valve device can be mentioned.

The electromagnetic valve device disclosed in Japanese Patent Application Laid-Open No. 61-237810 satisfies the second and third requirements, but cannot satisfy the first and fourth requirements. That is, it is difficult to make the valve lift variable, and it is not possible to reduce the impact when the mover is seated on the electromagnet.

The electromagnetic valve device disclosed in Japanese Patent Application Laid-Open No. 3-242409 satisfies the third requirement, but cannot satisfy the first, second, and fourth requirements. The purpose of variable control of the valve lift amount, which is the first requirement, is to adjust the intake air amount and improve the combustion state. Therefore,
The valve lift must be controlled accurately. However, since it is difficult to accurately position the open position of the valve that opens and closes at high speed by electromagnetic force, it is difficult for the electromagnetic valve device disclosed in this publication to accurately control the lift amount. Further, the balanced position of the valve due to the force of the spring during operation of the engine cannot be near the center between the open position and the closed position. Furthermore, it is not possible to reduce the impact when the mover is seated on the electromagnet.

The electromagnetic valve device disclosed in Japanese Patent Application Laid-Open No. 4-66706 has a structure in which a cushioning material is interposed between the contact surface of the mover and the electromagnet to reduce the impact when the user sits. However, since the cushioning material is a non-magnetic material, there is a problem that the magnetic circuit resistance increases, the electromagnetic force decreases, and the size of the electromagnetic device for obtaining the electromagnetic force required to open and close the valve increases. .

[0019]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art. One object of the present invention is to provide an electromagnetic valve device capable of accurately and variably controlling a valve lift. Is to provide.

Another object of the present invention is to make it possible to accurately and variably control the valve lift amount, and to set the valve equilibrium position by the force of a spring during operation of the engine near the center between the open position and the closed position. Another object of the present invention is to make it possible to bring the valve into an equilibrium position near the closed position by the force of a spring when power is not supplied to the electromagnetic valve device.

Still another object of the present invention is to reduce the generation of noise by reducing the impact when the mover is seated on the electromagnet, and to generate the electromagnetic force required by a small-sized electromagnetic device. It is to provide a valve device which can be used.

[0022]

Accordingly, the present invention provides electromagnet moving means for moving an electromagnet for driving a movable element for opening and closing a valve in the opening and closing direction of the valve. The movable element is seated on the open electromagnet. The valve lift is controlled accurately by stopping the valve lift.

Further, by moving a spring supporting member for supporting a spring for supporting the movement of the movable element for opening and closing the valve in the opening and closing direction so that the equilibrium position of the spring can be changed, the spring during operation of the engine can be changed. An equilibrium position of the valve by force is set near the center between the open position and the closed position, and when no power is supplied to the electromagnetic valve device, an equilibrium position of the valve by spring force is set near the closed position.

[0024] Further, by making one or both of the open electromagnet and the closed electromagnet elastically supported in the opening and closing direction of the valve, the impact noise generated when the mover is seated on the electromagnet is reduced. Features.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a longitudinal sectional view of an electromagnetic valve device according to an embodiment of the present invention. Although an engine (internal combustion engine) has an intake port and an exhaust port, the same applies to an electromagnetic valve device provided in any of the ports, and therefore, an example of an intake port will be described here.

The intake port 10a of the engine block 10
The shaft 1a has a valve guide 2
It is slidably supported by a and 2b. The mover 3 is made of a magnetic material such as iron, and is mechanically coupled to the shaft 1 a of the valve 1. The mover 3 is elastically supported at an equilibrium position by the force of the first spring 6 and the second spring 7 installed in a compressed state. The open electromagnet 4 and the closed electromagnet 5 are provided in the casing 8 so as to face each other with the mover 3 interposed therebetween. The open electromagnet 4 includes an open core 13 and an open coil 14, and the closed electromagnet 5 includes a closed iron core 11 and a closed coil 12.
9 is a valve seat facing the valve 1.

When power is supplied to the closing coil 12, the closing electromagnet 5 generates an electromagnetic force to attract and drive the mover 3, thereby pulling up the valve 1 and closing the intake port 10a.
Then, when the power supply to the closed coil 12 is interrupted and the power is supplied to the open coil 14, the movable element 3 is attracted and driven by the open electromagnet 4 to push down the valve 1 to open the intake port 10a.

The force of the first spring 6 installed in a compressed state is:
When the valve 1 is driven to close, the movable element 3 attracted by the open electromagnet 4 and located at the open position is separated from the open electromagnet 4 and moves toward the closed electromagnet 5. When the valve 1 is driven to open, the force of the second spring 7 installed in the compressed state is attracted by the closed electromagnet 5 and the mover 3 at the closed position leaves the closed electromagnet 5 and faces the open electromagnet 4. Help them move. Note that the first spring 6 and the second spring 7 may have a spring structure that functions to apply a pressing spring force or a tension spring force to the mover 3 depending on the expansion and contraction state depending on design specifications. . Further, the first spring 6 and the second spring 7 may be provided in a stretched state to have a spring structure that acts to pull the mover 3.

The electromagnetic valve device opens and closes the intake port 10a of the engine by repeating such operations.

In such an electromagnetic valve device, the opening operation stroke of the valve 1, that is, the valve lift amount, is required to be accurately variably controlled in order to eliminate the need for an engine throttle valve or perform lean combustion. You. In addition, a first device used to open and close the mover 3 is used.
It is desirable that the force of the spring 6 and the force of the second spring 7 be equal when the valve 1 is opened and closed. For this purpose, during operation of the engine, the first spring 6
It is required that the static equilibrium position of the mover 3 determined by the force of the second spring 7 is near the center of the space between the open electromagnet 4 and the closed electromagnet 5.

Further, in a state in which the opening / closing drive power is not supplied to the electromagnetic valve device, the static equilibrium position of the mover 3 determined by the force of the first spring 6 and the second spring 7 is close to the open magnet 4 or closed. It is required to be near the electromagnet 5. Because, assuming that the equilibrium position of the mover 3 is near the center of the space between the open electromagnet 4 and the closed electromagnet 5 immediately before starting the engine, the mover 3 is moved to the initial position, that is, the open electromagnet 4. 1 or the vicinity of the closed electromagnet 5
It must be driven only by the electromagnetic force against the force of the spring 6 and the second spring 7. However, in this assumed state, the electromagnetic force is small because the gap between the open electromagnet 4 or the closed electromagnet 5 and the mover 3 is wide, and it is difficult to drive the mover 3.

Further, it is conceivable that the supply of electric power to the electromagnetic valve device is interrupted during the operation of the engine due to a trouble such as a charging system of the automobile. At this time, if the equilibrium position of the mover 3 is on the open position side, there is a risk that the piston during the coasting motion will collide with the valve 1. Therefore, when power supply is cut off during operation of the engine, it is desirable that the mover 3 move to the closed electromagnet 4 side.

Further, quietness is required for an automobile engine. For this reason, in the electromagnetic valve device as well, it is required that the impact when the mover 3 is seated on the open electromagnet 4 or the closed electromagnet 5 is reduced to reduce noise.

(First Embodiment FIGS. 1 to 5)
A first embodiment of the electromagnetic valve device of the present invention will be described with reference to FIG. FIG. 1 is a longitudinal sectional view showing one embodiment of the electromagnetic valve device of the present invention, as described above. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG.
4A and 4B are partial cross-sectional views showing the operation state. FIG. 5 is a block diagram of the control circuit.

On the inner peripheral wall of the casing 8, there are formed guide grooves 15a and 15b extending in the valve opening / closing driving direction.
Sliding members 16a, 16b connected to the ring-shaped open magnet 4
Are slidably engaged with the guide grooves 15a and 15b to support the open electromagnet 4 movably in the opening and closing drive direction of the valve 1. Open magnet movers 17 a to 17 d made of a magnetic material such as iron are attached to the open magnet 4. Open magnet drive units 18a to 18d are provided to surround the projections of the open magnet movers 17a to 17d. The open magnet drive units 18a to 18d include open drive unit iron cores 19a to 19d made of a magnetic material such as iron and open drive unit coils 20a to 2d.
0d. The open magnet movers 17a to 17d are supported by open magnet springs 21a and 21b to be compressed, respectively. The open magnet movers 17a to 17d and the open magnet drive units 18a to 18d each constitute a linear stepping motor.

The end of the first spring 6 on the side opposite to the mover 3 is
First spring supporting members 22a-2 made of a magnetic material such as iron
Supported by 2d. 1st spring drive parts 23a-23
d is provided so as to surround the first spring support members 22a to 22d. The first spring driving units 23a to 23d
Is a first spring driving unit core 24 made of a magnetic material such as iron.
a to 24d and first spring driving unit coils 25a to 25d. The first spring support members 22a to 22d are supported by first support portion springs 26a and 26b, respectively. The first spring support members 22a to 22d and the first spring driving units 23a to 23d each constitute a linear stepping motor.

The controller 101 receives signals from the crank angle sensor 102, load sensor 103, and key switch 104 of the engine as inputs, and based on these input signals, the open magnet 4, the closed magnet 5, and the open magnet driving unit 18a.
To 18d and the first spring driving units 23a to 23d are controlled.

When no power is supplied to the electromagnetic valve device, as shown in FIG.
a, 26b are in an extended state and the first spring support member 22
a to 22 d are located above, and the static equilibrium position of the mover 3 determined by the balance of the forces of the first spring 6 and the second spring 7 is near the closed electromagnet 5.

When operating the engine by opening and closing this electromagnetic valve device with a small valve lift, FIG.
As shown in (a), the open electromagnet 4 is positioned at a high position so that the amount of reciprocating movement of the mover 3 is reduced. Also,
The static equilibrium position of the mover 3 determined by the balance between the forces of the first spring 6 and the second spring 7 is set near the center between the open electromagnet 4 and the closed electromagnet 5. For this purpose, the controller 101 includes the open drive coils 20a to 20d of the open magnet drive units 18a to 18d and the first spring drive units 23a to 23d.
Of the first spring driving unit coils 25a to 25d. Thereby, the first spring support members 22a to 22a
d and the open magnet movers 17a to 17d
a, 26b and the first spring drive units 23a to 23d and the open magnet drive units 18a to 18d against the forces of the open magnet springs 21a, 21b.
Pull in to 18d.

Further, the valve 1 is opened and closed with a small lift by controlling the drive power of the open electromagnet 4 and the closed electromagnet 5 in accordance with the crank angle of the engine to reciprocate the mover 3.

Next, when the valve lift of this electromagnetic valve device is increased, as shown in FIG.
Is positioned lower. The static equilibrium position of the mover 3 determined by the balance between the forces of the first spring 6 and the second spring 7 is set at the center of the enlarged gap between the open electromagnet 4 and the closed electromagnet 5 that has moved downward. So that it is near. For this purpose, the controller 101 controls the open magnet driving units 18a to 18a to 1
8d open driving unit coils 20a to 20d and first spring driving unit coils 25a to 25d of the first spring driving units 23a to 23d.
d is controlled.

Thus, the mover 3 reciprocates in the enlarged gap between the open electromagnet 4 and the closed electromagnet 5 to open and close the valve 1 with a large lift.

In this electromagnetic valve device, the shaft 1 of the valve 1
The mover 3 coupled to a is seated on the open electromagnet 4 and the movement of the mover 3 is stopped mechanically. Therefore, the valve lift can be controlled more accurately than in the conventional device in which the movement of the mover 3 is stopped by the balance between the spring force and the electromagnetic force. The valve lift can be changed by changing the position of the electromagnet 4. Here, the speed at which the electromagnet 4 is moved is extremely slow as compared with the opening and closing movement speed of the valve 1, so that the positioning of the electromagnet 4 can be performed accurately.

The open electromagnet 4 includes open magnet springs 21a and 21a.
Since the movable element 3 is elastically supported by the electromagnetic force 1b, the impact when the mover 3 is seated on the electromagnet 4 is reduced, and the noise can be reduced.

The open electromagnet 4 and the first spring support member 22
The positions a to 22d can be set freely within the respective movable ranges.

As described above, the electromagnetic valve device according to the first embodiment of the present invention can accurately change the valve lift. Further, in this electromagnetic valve device, at the time of engine operation, the static equilibrium position of the mover 3 determined by the balance of the forces of the first spring 6 and the second spring 7 is set to the open magnet 4.
The first spring 6 is located near the center of the space between the
And the force of the second spring 7 can be used effectively. Further, when no power is supplied to the electromagnetic valve device, the static equilibrium position of the mover 3 determined by the force of the first spring 6 and the second spring 7 can be shifted to the vicinity of the closed electromagnet 5. Furthermore, in this electromagnetic valve device, the impact when the mover 3 is seated on the open electromagnet 4 is mitigated by the elastic support of the open electromagnet 4 and noise is reduced.

The shape of the casing 8 is not limited to a cylindrical shape, and may be, for example, a cylindrical shape having a square cross section. In addition, the open electromagnet 4 and the closed electromagnet 5 are also shown in FIGS.
The shape is not limited to the shape shown in FIG. 3, but may be any shape as long as the movable element 3 can be sucked. Further, the guide grooves 15a, 15b and the sliding members 16a, 16
The shape and number of b are not limited to those shown in FIGS. 1 and 2, and any shape and number may be used as long as the electromagnet 4 can be smoothly slidably supported.

(Second Embodiment FIG. 6) FIG. 6 is a longitudinal sectional view showing a second embodiment of the electromagnetic valve device of the present invention. In the second embodiment, a first spring 6 and a second spring 7
The characteristic feature is that the static balance position change control of the mover 3 determined by the balance of the force is performed by changing the support position of the second spring 7. The other components are the same as those of the first embodiment described above, and therefore, the same components are denoted by the same reference numerals, or are not shown in the drawings, and redundant description is omitted.

The shaft 1a of the valve 1 in the second embodiment is supported in a cantilevered state by valve guides 2a and 2c. 1st spring drive part 2 in 1st Embodiment
3a to 23d, ie, the first spring 6 and the second
Second spring driving units 27a and 27b (actually, four units) are provided above the second spring 7 for adjusting the static equilibrium position of the mover 3 determined by the balance of the force of the spring 7. The configuration and operation of the second spring driving units 27a and 27b are the same as the configuration and operation of the first spring driving units 23a to 23d described above.

In the electromagnetic valve device having such a configuration, a large space for providing the open magnet drive units 18a to 18d can be secured. Therefore, the open magnet drive unit 18a
18d can be increased, and the force for driving the open electromagnet 4 can be sufficiently increased. Also, shaft 1 of valve 1
The cross-sectional area of the device in a plane perpendicular to a can be reduced. In the exhaust valve device, port 10
High temperature exhaust gas flows through a. Second spring driver 27
Since the positions a and 27b are located far away from the port 10a, it is possible to prevent the spring drive unit from causing a problem due to heat.

(Third Embodiment FIG. 7) FIG. 7 is a longitudinal sectional view showing a third embodiment of the electromagnetic valve device of the present invention. The third embodiment is designed so as to more effectively reduce the impact when the mover 3 is seated on the open electromagnet 4 or the closed electromagnet 5, and furthermore, the mover 3 is provided with the open electromagnet 4 or the closed electromagnet 5. It is characterized in that it is devised so as to support the movement of the mover 3 when moving away from it. The other components are the same as those of the first embodiment described above, and therefore, the same components are denoted by the same reference numerals, or are not shown in the drawings, and redundant description is omitted.

The electromagnetic valve device according to the third embodiment includes a closed magnet drive unit 2 having the same configuration as the open magnet drive units 18a to 18d, in addition to the open magnet drive units 18a to 18d.
8a and 28b (four are actually provided). Immediately before the mover 3 is seated on the open magnet 4, the controller 101 controls the open magnet drive units 18a to 18a so that the open magnet 4 has a moving speed in the same direction as the moving speed of the mover 3.
18d is controlled. Immediately before the mover 3 is seated on the closed electromagnet 5, the controller 101 controls the closed magnet driving units 28a and 28b so that the closed electromagnet 5 has a moving speed in the same direction as the moving speed of the mover 3. Control. Further, at the moment when the mover 3 starts moving in the direction of the closed electromagnet 5 away from the open electromagnet 4, the open magnet drive units 18 a to 18 d are moved so that the open electromagnet 4 is moved in the direction of the closed electromagnet 5. It is controlled by the controller 101. Similarly, at the moment when the mover 3 moves away from the closed electromagnet 5 and starts moving in the direction of the open electromagnet 4, the closed magnet driving units 28a and 28b are moved so that the closed electromagnet 5 is moved in the direction of the open electromagnet 4. Is controlled by the controller 101.

According to the third embodiment, the impact when the mover 3 is seated on the open electromagnet 4 or the closed electromagnet 5 can be greatly reduced, and the noise can be significantly reduced. Become like

At the moment when the mover 3 moves away from the open electromagnet 4 or the closed electromagnet 5 and moves in the direction of the other closed electromagnet 5 or the open electromagnet 4, the moving force of the open electromagnet 4 or the closed electromagnet 5 increases. Since the movement of the movable member 3 is supported, the movable element 3 can be driven at a high speed, and an electromagnetic valve device with good responsiveness can be obtained.

(Fourth Embodiment FIG. 8) FIG. 8 is a longitudinal sectional view showing a fourth embodiment of the electromagnetic valve device of the present invention. In the fourth embodiment, second spring driving units 29a and 29b (actually four units are provided) are provided instead of the first spring driving units 23a to 23d in the third embodiment shown in FIG. It has special features. This second spring driving unit 2
The configurations and operations of 9a and 29b are the same as those of the first spring driving units 23a to 23d in FIG.

In such an electromagnetic valve device, a space can be provided around the open magnet drive units 18a to 18d.
The force for driving the open electromagnet 4 can be increased by enlarging the open magnet drive units 18a to 18d, or the cross section of the surface of the valve 1 perpendicular to the axis 1a can be reduced. Also, the second spring driving unit 29a,
Since the port 29b is far away from the port 10a, problems of the second spring driving sections 29a and 29b due to the heat of the exhaust gas can be prevented. Also, the noise is small and
A highly responsive electromagnetic valve device can be obtained.

(Fifth Embodiment FIG. 9) FIG. 9 is a longitudinal sectional view showing a fifth embodiment of the electromagnetic valve device of the present invention. The electromagnetic valve device of the fifth embodiment is different from the first embodiment shown in FIG. 1 in the configuration of the open magnet drive unit 18 and the first spring drive unit 23. The other components are the same as those of the first embodiment described above, and thus the same reference numerals are given to the common components, or the drawings are omitted and the duplicate description will be omitted.

In the fifth embodiment, the open magnet drive 1
Reference numeral 8 denotes a simple open drive unit core 30 made of a magnetic material such as iron.
And a simple opening drive coil 31. The open magnet 4 is provided with a simple open magnet mover 34 made of a magnetic material such as iron. When power is supplied to the simple open drive coil 31, the open drive 18 attracts the simple open magnet mover 34 and moves the open electromagnet 4.

The first spring driving section 23 includes a simple first spring core 32 made of a magnetic material such as iron and a simple first spring driving coil 33. The mover 3 of the first spring 6
A simple first spring support member 35 made of a magnetic material such as iron is provided at an end opposite to the above. First spring driving unit 23
When electric power is supplied to the simple first spring driving coil 33, the simple first spring support member 35 is sucked and moved.

In the electromagnetic valve device according to the fifth embodiment, the number of coils provided in the open magnet drive section 18 is small, the number of coils provided in the first spring drive section 23 is small, and Since the shapes of the magnet mover 34 and the simple first spring support portion 35 are simple, an electromagnetic valve device with a low manufacturing cost can be provided.

(Sixth Embodiment FIG. 10) FIG.
It is a longitudinal section showing a 6th embodiment of an electromagnetic valve device of the present invention. The electromagnetic valve device according to the sixth embodiment is a modification of the second embodiment shown in FIG. 6, and differs in that a ball screw mechanism 40 is used to drive the electromagnet 4.

The ball screw mechanism 40 includes a screw actuator 36 such as a servomotor, a screw portion 37 and a nut portion 38.
And a screw mechanism support portion 39. This ball screw mechanism 4
0 indicates that when the screw 37 is rotated by supplying electric power to the screw actuator 36, the nut 38 moves up and down. The nut portion 38 is coupled so as to move integrally with the electromagnet 4, whereby the nut portion 38 is moved.
To move.

This electromagnetic valve device has a ball screw mechanism 4
0, the open magnet springs 21a, 21
b may be omitted. Further, precise positioning of the open electromagnet 4 can be performed.

The supporting portions of the closed electromagnet 5 and the first spring 6
As a mechanism for moving the support member of the second spring 7,
A similar ball screw mechanism may be used.

(Seventh Embodiment FIG. 11) FIG.
It is a longitudinal section showing a 7th embodiment of an electromagnetic valve device of the present invention. The seventh embodiment is a modification of the first embodiment shown in FIG. 1 and differs from the first embodiment in that a piezo drive mechanism 41 is used to move the electromagnet 4.

The piezo drive mechanism 41 includes a piezo element 4
2, drive plate 43, displacement enlarging part 45, piezo piston 46
Is provided. A fluid 44 is sealed in the displacement enlarging portion 45. The cross-sectional area of the displacement enlarging section 45 on the drive plate 43 side is larger than the cross-sectional area on the piezo piston 46 side. As a result, the displacement of the piezo element 42 is enlarged and the piezo piston 4
I'm trying to tell 6.

By supplying power to the piezo element 42, the distortion of the piezo element 42 is transmitted to the piezo piston 46 via the fluid 44, and the open electromagnet 4 moves.

By employing such a piezo drive mechanism 41, a highly responsive electromagnetic valve device can be obtained.

It should be noted that such a piezo drive mechanism may be used as a mechanism for moving the support member of the closed electromagnet 5, the first spring 6, or the support member of the second spring 7.

(Eighth Embodiment, FIG. 12) FIG.
It is a longitudinal section showing an 8th embodiment of an electromagnetic valve device of the present invention. The eighth embodiment is a modification of the embodiment shown in FIG.
There is a difference in using the fluid drive mechanism 47.

The fluid drive mechanism 47 includes a fluid pressure tube 48, a fluid pressure cylinder 49, a fluid pressure piston 50, and a working fluid 51. By the action of an external fluid pressure control mechanism (not shown), the pressure of the working fluid 51 in the fluid pressure cylinder 49 is changed via the fluid pressure tube 48 to move the fluid pressure piston 50 up and down. This fluid pressure piston 50 is
, So that the open electromagnet 4 is moved.

The working fluid 51 is preferably oil, but is not limited thereto, and may be air, water, or the like. When the working fluid 51 is used under pressure, the open magnet spring 21a is a tension spring.

This electromagnetic valve device can obtain a large driving force for moving the electromagnet 4 and obtain an electromagnetic valve device with low power consumption because no electric power is used for moving the electromagnet 4. Can be.

(Ninth Embodiment FIG. 13) FIG.
It is the longitudinal section and fluid pressure control circuit which show a 9th embodiment of the electromagnetic valve device of the present invention. The ninth embodiment has a configuration in which the intake port 10a of a four-cylinder engine is opened and closed using the electromagnetic valve device shown in FIG.
Needless to say, the present invention can be similarly applied to engines having other numbers of cylinders.

A fluid pressure control circuit for operating the fluid drive mechanism 47 of each of the electromagnetic valve devices 58a to 58d provides power for moving the open magnet 4 by pressurizing the fluid in the fluid tank 52 by the fluid pressure source 53. obtain. The high pressure fluid from the fluid pressure source 53 is stored in the high pressure side accumulator 54.
The high-pressure fluid stored in the high-pressure accumulator 54 is supplied to each of the electromagnetic valve devices 58a to 58d by opening the high-pressure control valves 55a to 55d, and is supplied to each of the fluid pressure cylinders 49.
Increase the working fluid pressure inside. Each electromagnetic valve device 58a
When lowering the fluid pressure in each of the fluid pressure cylinders 49 to 58d, the fluid in each fluid pressure cylinder 49 is returned to the fluid tank 52 via the low pressure side accumulator 57 by opening the low pressure side control valves 56a to 56d.

By using such a fluid pressure control circuit, it is possible to variably control the valve lift amounts of the plurality of electromagnetic valve devices 58a to 58d using one fluid pressure source 53.

(Tenth Embodiment, FIG. 14) FIG.
FIG. 14 is a longitudinal sectional view and a fluid pressure control circuit showing a tenth embodiment of the electromagnetic valve device of the present invention. The tenth embodiment is a modification of the ninth embodiment shown in FIG. 13 and differs from the ninth embodiment in that a fluid pressure control circuit for operating the fluid pressure mechanism 47 is simplified.

In the tenth embodiment, the high-pressure side control valve 5
5a and the low-pressure side control valve 56a, the pressure of the working fluid of the two electromagnetic valve devices 58a and 58b is controlled, and the high-pressure side control valve 55b and the low-pressure side control valve 56b are used to control the two electromagnetic valve devices 58c and 58c. The pressure of the working fluid at 58d is controlled.

According to the fluid pressure control circuit having such a configuration, the valve lift of the two solenoid valve devices can be controlled by one set of control valves, so that the number of control valves can be reduced.

Similarly, it goes without saying that three or more electromagnetic valve devices may be controlled by one set of control valves.

(Eleventh Embodiment FIG. 15) FIG.
FIG. 21 is a longitudinal sectional view and a fluid pressure control circuit showing an eleventh embodiment of the electromagnetic valve device of the present invention. The eleventh embodiment is a modification of the tenth embodiment shown in FIG. 14, and is different in that the fluid pressure control circuit for operating the fluid pressure mechanism 47 is further simplified.

In the eleventh embodiment, the high pressure side control valve 5
5a and the low pressure side control valve 56a,
9a, the high-pressure control valve 55b and the low-pressure control valve 56
14B is that a three-way control valve 59b is used instead of the b.
Is different from the tenth embodiment shown in FIG. Three-way control valve 59
a, 59b serve to flow the fluid from the high-pressure side accumulator 54 to each of the electromagnetic valve devices 58a to 58d, and serve to cause the low-pressure side accumulator 57 to flow from each of the electromagnetic valve devices 58a to 58d.
It also has the function of flowing fluid to

According to the fluid pressure control circuit having such a configuration, the number of control valves can be further reduced.

(Twelfth Embodiment FIG. 16) FIG.
FIG. 14 is a longitudinal sectional view showing a twelfth embodiment of the electromagnetic valve device of the present invention. The twelfth embodiment is a modification of the sixth embodiment shown in FIG. 10, and includes a single ball screw mechanism 40 and two electromagnetic valve devices 48a and 58.
b, the open electromagnets 4a and 4b are moved. In addition, two or more electromagnetic valve devices may share one ball screw mechanism 40.

According to the electromagnetic valve device having such a configuration, the number of ball screw mechanisms 40 can be reduced.

(Thirteenth Embodiment FIGS. 17 and 18)
FIG. 17 is a longitudinal sectional view showing a thirteenth embodiment of the electromagnetic valve device of the present invention. FIGS. 18 (a) and (b) show FIG.
7 is a cross-sectional view taken along line CC of FIG. 7, in which (a) is a female screw portion, and (b) is a male screw portion and an open electromagnet. The thirteenth embodiment is a modification of the first embodiment shown in FIG. 1 and differs from the first embodiment in a drive mechanism for moving the electromagnet 4.

In the thirteenth embodiment, as shown in FIG. 18B, a male screw portion 60 having a spiral concave and convex portion is provided on the outer periphery of the electromagnet 4. The male screw part 60 includes a male screw thread part 62 that is a spiral convex part and a male screw root part 61 that is a spiral concave part. And, as shown in FIG. 18A, a female screw portion 75 having a spiral uneven portion is provided on the inner peripheral portion of the casing 8. The female screw portion 75
It has a female thread root 63 which is a spiral concave part and a female thread part 64 which is a spiral convex part. The male thread valley 62 meshes with the female thread valley 63, and the male thread valley 61 meshes with the female thread ridge 64.

An annular open magnet rotary iron core 65 is disposed inside the annular open magnet rotary drive iron core 67 provided with the open magnet rotary drive coil 66. The open magnet rotary iron core 65, the open magnet rotary drive coil 66, and the open magnet rotary drive iron core 67 constitute a rotary motor.

By supplying electric power to the open magnet rotating drive coil 66, a rotating force is applied to the open magnet rotating iron core 65 to rotate the open magnet 4. When the open electromagnet 4 rotates, the male screw part 60 and the female screw part 75 mesh with each other,
The open electromagnet 4 moves upward or downward.

In this electromagnetic valve device, the open magnet springs 21a, 2a
1b can be omitted, and precise positioning of the open electromagnet 4 can be performed.

Note that such a rotary drive mechanism may be used for driving the closed electromagnet, the first spring support, or the second spring support.

(Fourteenth Embodiment FIGS. 19 and 20)
FIG. 19 is a longitudinal sectional view showing a fourteenth embodiment of the electromagnetic valve device of the present invention, and shows a state where power is not supplied. FIG. 20 shows the operation state.
(A) shows the first stage of initialization immediately before the engine starts,
(B) shows the second stage of this initialization.

In this electromagnetic valve device, when power is not supplied, the static equilibrium position of the mover 3 determined by the balance between the forces of the first spring 6 and the second spring 7 is as shown in FIG. First, it is set near the center of the open electromagnet 4 and the closed electromagnet 5.

In the first stage of initialization immediately before the start of the engine, as shown in FIG. 20A, the open magnet 4 is moved by the ball screw mechanism 40 in the direction of the mover 3, that is, in the direction of the arrow. Then, when the distance between the electromagnet 4 and the mover 3 becomes sufficiently small, power is supplied to the electromagnet 4 to attract the mover 3. Then, in the second stage of the initialization, as shown in FIG. 20B, in a state where the movable element 3 is attracted to the electromagnet 4, the ball screw mechanism 40 moves the electromagnet 4 toward the initial position, that is, an arrow. Move in the direction of.

This electromagnetic valve device uses the initialization method as described above, without using a mechanism for moving the support of the first spring 6 and the support of the second spring 7, and moving the movable element 3 immediately before starting the engine. It can be moved to the initial position.

It is needless to say that such an initialization method can be similarly used when a mechanism other than the ball screw mechanism 40 is used as a drive mechanism of the electromagnet 4.

When the closed electromagnet 5 is movable,
Similar initialization may be performed using the closed electromagnet 5.

(Fifteenth Embodiment FIG. 21) FIG.
FIG. 23 is a longitudinal sectional view showing a fifteenth embodiment of the electromagnetic valve device of the present invention. The fifteenth embodiment is a modification of the first embodiment shown in FIG. 1, and includes a first spring supporting member instead of the first spring supporting members 22a and 22b and the first spring driving portions 23a and 23b. Pillars 68a and 68b are provided. The configuration and operation of the other parts are the same as in the first embodiment shown in FIG.

[0099] In such an embodiment, the first spring 6 and the second spring 6
This can be adopted in the case of an electromagnetic valve device that does not need to adjust the equilibrium position of the mover 3 determined by the balance of the force of the spring 7. According to such a configuration, since the movable first spring support member and the first spring driving unit are not required, an electromagnetic valve device having a small number of parts can be obtained.

(Sixteenth Embodiment FIG. 22) FIG.
FIG. 27 is a longitudinal sectional view showing a sixteenth embodiment of the electromagnetic valve device of the present invention. The sixteenth embodiment is effective as an electromagnetic valve device used for a low-cost engine that can achieve its purpose by reducing the impact when the mover 3 is seated on the open electromagnet 4 or the closed electromagnet 5. .

In the electromagnetic valve device of this embodiment, the open electromagnet 4 is elastically supported by open springs 70a and 70b, and the closed electromagnet 5 is elastically supported by close springs 69a and 69b. A drive mechanism for moving the open electromagnet 4, the closed electromagnet 5, the end of the first spring 6, and the end of the second spring 7 is not provided. The impact when the mover 3 is seated on the open electromagnet 4 is reduced by the open springs 70a and 70b, and the closed electromagnet 5
The impact when the mover 3 is seated on the spring
b relaxes. Since such a shock absorbing means does not require a non-magnetic buffer member to be interposed in the magnetic circuit, an increase in magnetic resistance can be suppressed, and the size of the electromagnetic device can be reduced.

Further, since the electromagnetic valve device does not require a driving mechanism, the device has a small number of parts.

Each of the embodiments described above uses the first spring 6
Although the second spring 7 is used as a compression spring installed in a compressed state, the second spring 7 may be deformed into a spring structure that also acts as a tension spring or a configuration using a tension spring installed in an extended state depending on the degree of extension. it can. In the case of such a modification, the first spring support member 22a,
To 22d are pulled by the first spring 6 and the second spring 7, so that the first spring driving units 23a to 23d
The d, the second spring driving portions 27a, 27b, 29a, 29b, and the first supporting portion springs 26a, 26b need to be configured to generate a supporting force that supports these pulling forces.

(Seventeenth Embodiment FIG. 23) FIG.
Is a longitudinal sectional view showing a seventeenth embodiment of the electromagnetic valve device of the present invention, and shows a state where the electromagnetic valve device is mounted on a four-cylinder engine. Needless to say, the present invention can be similarly applied to engines having other numbers of cylinders.

The first cylinder 71a has a first cylinder 72a and a first piston 73a. The second cylinder 71b is
It includes a cylinder 72b and a second piston 73b. The third cylinder 71c includes a third cylinder 72c and a third piston 73c.
Is provided. The fourth cylinder 71d includes a fourth cylinder 72d and a fourth piston 73d.

The electromagnetic valve devices 74a to 74h of the first embodiment shown in FIG. 1 are mounted on the respective intake and exhaust ports of the first cylinder 71a to the fourth cylinder 71d. As these electromagnetic valve devices 74a to 74h, those of other embodiments can be used.

The electromagnetic valve devices 74a to 74h according to the seventeenth embodiment have a variable valve lift. Therefore, it is possible to realize a throttle valveless operation in which the throttle valve is eliminated by giving the effect of the throttle to the intake valve. In addition, a so-called lean burn is realized because a swirl of intake air is generated by reducing a valve lift amount of one of the two intake valves to stabilize combustion even when the air-fuel mixture is made thin. Can be.

Further, in the engine having such a configuration, even when the power supply to the electromagnetic valve device is cut off during the operation of the engine, all the intake and exhaust valves are closed, so that the pistons 73a to 73d collide with the valves. Nothing.

The engine having such a configuration is quiet because the opening and closing noise of the electromagnetic valve device is small.

[0110]

According to the present invention, since the movable element is stopped by being seated on the position-variable type open magnet, the valve lift can be accurately variably controlled.

Further, when the engine is operating, the balanced position of the valve by the force of the spring is set near the center between the open position and the closed position, and when no power is supplied to the electromagnetic valve device, the balanced position of the valve by the force of the spring is closed. It can be near the position. As a result, the force of the spring can be effectively used, and the collision between the piston and the valve can be prevented.

Further, by elastically supporting the electromagnet,
The impact when the mover is seated on the electromagnet can be reduced without increasing the magnetic resistance to reduce noise, and a small-scale electromagnetic device can generate the required electromagnetic force.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of an electromagnetic valve device of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4 is a partial sectional view showing an operation state of the electromagnetic valve device shown in FIG.

5 is a control circuit block diagram of the electromagnetic valve device shown in FIG.

FIG. 6 is a longitudinal sectional view showing a second embodiment of the electromagnetic valve device of the present invention.

FIG. 7 is a longitudinal sectional view showing a third embodiment of the electromagnetic valve device of the present invention.

FIG. 8 is a longitudinal sectional view showing a fourth embodiment of the electromagnetic valve device of the present invention.

FIG. 9 is a longitudinal sectional view showing a fifth embodiment of the electromagnetic valve device of the present invention.

FIG. 10 is a longitudinal sectional view showing a sixth embodiment of the electromagnetic valve device of the present invention.

FIG. 11 is a longitudinal sectional view showing a seventh embodiment of the electromagnetic valve device of the present invention.

FIG. 12 is a longitudinal sectional view showing an eighth embodiment of the electromagnetic valve device of the present invention.

FIG. 13 is a longitudinal sectional view and a fluid pressure control circuit showing a ninth embodiment of the electromagnetic valve device of the present invention.

FIG. 14 is a longitudinal sectional view and a fluid pressure control circuit showing a tenth embodiment of the electromagnetic valve device of the present invention.

FIG. 15 is a longitudinal sectional view and a fluid pressure control circuit showing an eleventh embodiment of the electromagnetic valve device of the present invention.

FIG. 16 is a longitudinal sectional view showing a twelfth embodiment of the electromagnetic valve device of the present invention.

FIG. 17 is a longitudinal sectional view showing a thirteenth embodiment of the electromagnetic valve device of the present invention.

18 is a sectional view taken along the line CC in FIG.

FIG. 19 is a longitudinal sectional view showing a fourteenth embodiment of the electromagnetic valve device of the present invention.

20 is a partial cross-sectional view showing an initialization operation state of the electromagnetic valve device shown in FIG.

FIG. 21 is a longitudinal sectional view showing a fifteenth embodiment of the electromagnetic valve device of the present invention.

FIG. 22 is a longitudinal sectional view showing a sixteenth embodiment of the electromagnetic valve device of the present invention.

FIG. 23 is a longitudinal sectional view showing a seventeenth embodiment of the electromagnetic valve device of the present invention, and shows a state where the electromagnetic valve device is mounted on a four-cylinder engine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Valve, 1a ... Shaft, 3 ... Mover, 4 ... Open electromagnet, 5
... Closed electromagnet, 6 ... 1st spring, 7 ... 2nd spring, 8 ... casing, 9 ... valve seat, 10a ... port, 15a, 1
5b: guide groove, 16a, 16b: sliding member, 17a-
17d: open magnet mover, 18a to 18d: open magnet drive unit, 21a, 21b: open magnet spring, 22a to 22d: first spring support member, 23a to 23d: first spring drive unit.

Claims (17)

[Claims] 1. A mover mechanically coupled to an intake or exhaust valve of an internal combustion engine, an open electromagnet for attracting the mover to open the valve, and the movable magnet to close the valve. A closed electromagnet that attracts a child, a first spring and a second spring that apply a force to the movable element in a direction to open and close a valve, a first spring support member that supports the first spring, and the second spring. A valve driving device comprising: a second spring supporting member for supporting; a valve driving device provided with electromagnet moving means for moving the open magnet in an opening and closing direction of the valve. 2. A mover mechanically coupled to an intake or exhaust valve of an internal combustion engine, an open magnet for attracting the mover to open the valve, and the movable magnet to close the valve. A closed electromagnet that attracts a child, a first spring and a second spring that apply a force to the movable element in a direction to open and close a valve, a first spring support member that supports the first spring, and the second spring. A valve driving device comprising a second spring supporting member for supporting, wherein one or both of the open electromagnet and the closed electromagnet can be moved in the opening and closing direction of the valve. 3. A mover mechanically coupled to an intake or exhaust valve of an internal combustion engine, an open magnet for attracting the mover to open the valve, and the movable magnet to close the valve. A closed electromagnet that attracts a child, a first spring and a second spring that apply a force to the movable element in a direction to open and close a valve, a first spring support member that supports the first spring, and the second spring. An electromagnet moving means for moving one or both of the open magnet and the closed electromagnet in the opening and closing direction of the valve, in the valve driving device provided with a second spring supporting member for supporting, the first spring supporting member, A valve driving device provided with a spring support member moving means for moving one or both of the second spring support members in the opening and closing direction of the valve. 4. A mover mechanically coupled to an intake or exhaust valve of an internal combustion engine, an open magnet for attracting the mover to open the valve, and the movable magnet to close the valve. A closed electromagnet that attracts a child, a first spring and a second spring that apply a force to the movable element in a direction to open and close a valve, a first spring support member that supports the first spring, and the second spring. A valve driving device comprising: a second spring supporting member for supporting the valve; and a means for supporting the open magnet and the first spring supporting member so as to be movable in an opening and closing direction of the valve. . 5. A mover mechanically coupled to an intake or exhaust valve of an internal combustion engine, an open magnet for attracting the mover to open the valve, and the movable magnet to close the valve. A closed electromagnet that attracts a child, a first spring and a second spring that apply a force to the movable element in a direction to open and close a valve, a first spring support member that supports the first spring, and the second spring. A valve driving device comprising: a second spring supporting member for supporting the valve; and a means for supporting the open magnet and the second spring supporting member so as to be movable in an opening and closing direction of the valve. apparatus. 6. A mover mechanically coupled to an intake or exhaust valve of an internal combustion engine, an open magnet for attracting the mover to open the valve, and the movable magnet to close the valve. A closed electromagnet that attracts a child, a first spring and a second spring that apply a force to the movable element in a direction to open and close a valve, a first spring support member that supports the first spring, and the second spring. A valve driving device including a second spring support member for supporting, wherein a means for supporting the open electromagnet, the closed electromagnet, and the first spring support member movably in an opening and closing direction of the valve is provided. Valve driving device. 7. A mover mechanically coupled to an intake or exhaust valve of an internal combustion engine, an open magnet for attracting the mover to open the valve, and the movable magnet to close the valve. A closed electromagnet that attracts a child, a first spring and a second spring that apply a force to the movable element in a direction to open and close a valve, a first spring support member that supports the first spring, and the second spring. A valve driving device including a supporting second spring supporting member, wherein a means for supporting the open electromagnet, the closing electromagnet, and the second spring supporting member so as to be movable in an opening and closing direction of the valve is provided. Valve driving device. 8. The valve driving device according to claim 1, wherein at least one of the open magnet, the closed magnet, the first spring support member, and the second spring support member is moved in a valve opening / closing direction. The valve driving device is characterized in that the movably supporting means includes any of a mechanism using an electromagnetic force, a mechanism using a ball screw, a mechanism using a piezo element, and a mechanism using a fluid pressure as a driving source. . 9. The valve driving device according to claim 1, wherein at least one of the open magnet, the closed magnet, the first spring supporting member, and the second spring supporting member is moved in a valve opening / closing direction. The valve driving device is characterized in that the movably supporting means is shared by a plurality of valve driving devices. 10. A casing as claimed in claim 1, wherein a spiral concave / convex portion is provided on the outer periphery of the open magnet or the closed electromagnet, and the open magnet and the closed electromagnet are provided inside. A spiral uneven portion corresponding to the uneven portion is provided on the inner peripheral portion of the housing, and one or more of the open electromagnet, the closed electromagnet, and the casing are rotated about an axis substantially parallel to the axis of the valve, thereby opening the electromagnet. A valve driving device for moving one or both of an electromagnet and a closed electromagnet in a valve opening / closing direction. 11. The valve driving apparatus according to claim 3, wherein one or both of the open electromagnet and the closed electromagnet are moved in the valve opening / closing direction during operation of the internal combustion engine. The static equilibrium position of the mover determined by the balance between the spring force of the first spring and the spring force of the second spring is near the center between the open electromagnet position and the closed electromagnet position after the movement. A valve driving device characterized in that one or both of a first spring support and a second spring support are moved in a valve opening / closing direction. 12. The valve driving device according to claim 1, wherein one of the open magnet and the closed electromagnet is moved to approach the movable element immediately before starting the internal combustion engine. The mover is attracted by an open electromagnet or a closed electromagnet approaching the mover,
Thereafter, the valve driving device moves the open electromagnet or the closed electromagnet approaching the mover so as to return to a predetermined position. 13. The valve driving device according to claim 1, wherein when the movable element is seated on the open or closed electromagnet, the open or closed electromagnet is moved in the same direction as the moving direction of the movable element. A valve driving means for driving the open electromagnet or the closed electromagnet in the opening and closing direction of the valve so as to have a moving speed of. 14. The valve driving device according to claim 1, wherein the movable element adsorbed on the open electromagnet or the closed electromagnet is detached from the open electromagnet or the closed electromagnet. Alternatively, a valve driving device is provided with driving means for moving the closed electromagnet in the moving direction of the mover. 15. A mover mechanically coupled to an intake or exhaust valve of an internal combustion engine, an open magnet for attracting the mover to open the valve, and the movable magnet to close the valve. A closed electromagnet that attracts a child, a first spring and a second spring that apply a force to the movable element in a direction to open and close a valve, a first spring support member that supports the first spring, and the second spring. A valve driving device provided with a second spring supporting member for supporting, wherein a means for elastically supporting one or both of the open electromagnet and the closed electromagnet in the opening and closing direction of the valve is provided. Valve drive. 16. An electromagnetic valve device according to claim 1, wherein said movable element is mechanically connected to a valve. 17. An internal combustion engine using the electromagnetic valve device according to claim 16.