JPH0960513A - Valve system for internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate seating speed control while reducing a holding current when an engine valve is closed in a valve system for an internal combustion engine provided with valve closing/opening side electromagnets so as to operate the engine valve opened/closed by electromagnetic force displayed by these electromagnets. SOLUTION: Valve closing/opening side electromagnets 91 , 101 are arranged to be opposed in both sides of an armature 8 in a manner wherein a maximum space between these electromagnets 91 , 101 is regulated and moving adjacently/ separately relating to the armature 8 can be performed, and an elastic means 131 , energizing these electromagnets 91 , 101 in the direction separating from each other, is provided between both the electromagnets 91 , 101 .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve operating system for an internal combustion engine which opens and closes an engine valve by an electromagnetic force exerted by an electromagnet.

[0002]

2. Description of the Related Art Conventionally, such a device is disclosed in, for example, US Pat. No. 3,882,833 and International Application WO WO.
It is already known from 95/00959 and the like.

[0003]

SUMMARY OF THE INVENTION In the above conventional one,
The valve-closing side electromagnet and the valve-opening side electromagnet are fixedly arranged so as to face each other on both sides of the armature, and in order to obtain a reliable valve seating state of the engine valve, the valve-closing side electromagnet and the armature are closed when the engine valve is closed. It is necessary to set a clearance between them, and to keep the electromagnetic force exerted by the valve-closing electromagnet relatively large in order to hold the engine valve, that is, the armature in the valve closing position, the current supplied to the valve-closing electromagnet should be relatively large. I have to make it bigger. The speed control when the engine valve is seated is performed by adjusting the current supplied to the valve-closing electromagnet, but in the region where the gap between the valve-closing electromagnet and the armature is very small, the electromagnetic force is sensitive to changes in the current. It is difficult to precisely control the attracting electromagnetic force of the valve closing electromagnet.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a valve operating system for an internal combustion engine, in which the holding current is reduced when the engine valve is closed and the seating speed is easily controlled. To do.

[0005]

In order to achieve the above object, the invention according to claim 1 provides an armature interlocked with and connected to an engine valve and an electromagnetic force for operating the engine valve in a valve closing direction when energized. A valve-closing electromagnet that affects the armature and a valve-open electromagnet that affects the armature by an electromagnetic force that operates the engine valve in the valve opening direction when energized are provided, and the armature is in a predetermined neutral position when both electromagnets are not energized. In a valve operating device for an internal combustion engine that is elastically held, the valve-closing side and valve-opening side electromagnets are arranged facing each other on both sides of the armature, with the maximum distance between the electromagnets being regulated and the movement being able to move toward and away from the armature. Further, elastic means for urging the electromagnets in a direction in which the electromagnets are separated from each other is provided between the electromagnets.

The invention according to claim 2 is the above-mentioned claim 1.
In addition to the configuration of the invention described above, the elastic means comprises a pair of springs provided respectively between the electromagnets and the armature by exerting a spring force for holding the armature in a predetermined neutral position in a non-energized state of the electromagnets. It is characterized by

According to a third aspect of the invention, in addition to the structure of the first aspect of the invention, the armature is exerted from both sides by exerting a spring force for holding the armature at a predetermined neutral position in a non-energized state of both electromagnets. It is characterized by further comprising a pair of springs for biasing.

According to a fourth aspect of the present invention, an armature interlocked with and connected to the engine valve, a valve-closing electromagnet that exerts an electromagnetic force on the armature to operate the engine valve in the valve closing direction when energized, and the engine valve when energized. Valve-side electromagnet that exerts an electromagnetic force to operate the armature in the valve opening direction, and spring force that holds the armature in a predetermined neutral position in a non-energized state of both electromagnets to urge the armature from both sides. In a valve operating system of an internal combustion engine including a first and a second spring, a valve opening side electromagnet is fixedly arranged facing one side of an armature, and a maximum distance between the valve opening side electromagnet and the armature is restricted. A valve-closing electromagnet is disposed opposite to the other side of the armature to enable movement toward and away from the valve, and the valve-closing electromagnet is placed between the valve-closing electromagnet and a fixed position. Wherein the third spring biasing in a direction et away is provided.

According to a fifth aspect of the present invention, in addition to the configuration of the invention according to any one of the first to fourth aspects, the valve-closing electromagnet has a maximum distance from the valve-opening electromagnet. When the armature is attracted to the valve-closing electromagnet due to energization of the valve-closing electromagnet while the valve is in the position, the valve-closing electromagnet moves from the restricted position until it comes into contact with the armature. The first distance is the second distance to the seating position of the engine valve when the valve-closing electromagnet abuts the armature.
It is characterized by being set larger than the distance.

According to a sixth aspect of the invention, in addition to the structure of the fifth aspect of the invention, the moving speed of the engine valve in the valve closing direction when the valve-closing electromagnet abuts the armature is approximately zero. It is characterized by being set.

According to a seventh aspect of the present invention, in addition to the configuration of the fifth aspect of the invention, the value obtained by subtracting the second distance from the first distance is the maximum value for thermal expansion of the engine valve. It is characterized in that it is set to such an extent that the valve-closing electromagnet can be prevented from coming into contact with the restriction position when seated.

According to an eighth aspect of the invention, in addition to the structure of the fourth aspect of the invention, the set load of the third spring is set to be smaller than the maximum electromagnetic force exerted by the valve-closing side electromagnet when it is energized. , The spring force exerted by the third spring when the valve-closing electromagnet is in contact with the armature is greater than the force in the valve opening direction acting on the armature due to the difference in spring force between the first and second springs at that time. It is characterized by being set.

Further, in addition to the structure of the invention according to any one of the above-mentioned claims 1 to 4, the invention according to claim 9 further comprises a valve-closing electromagnet slidably fitted in a fixed housing, It is characterized in that a resistance member that comes into contact with the housing and exhibits sliding resistance is provided.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below based on the embodiments of the present invention shown in the accompanying drawings.

1 to 4 show a first embodiment of the present invention. FIG. 1 is a vertical sectional view of a valve operating system in a state where an engine valve is in a neutral position, and FIG. 2 is a valve closing operation. And FIG. 3 is a longitudinal sectional view corresponding to FIG. 1 in a state in which the engine valve moves from the neutral position to the valve closing position side, and FIG. 4 shows the engine. FIG. 2 is a longitudinal sectional view corresponding to FIG. 1 with the valve in the closed position.

First, in FIG. 1, a cylinder head 1 is provided with a valve seat 3 having a valve opening 2 opened in the central portion thereof facing a combustion chamber 4, and serves as an intake valve or an exhaust valve which can be seated on the valve seat 3. The electromagnetic drive means 6 ₁ is connected to the engine valve 5.

The electromagnetic drive means 6 ₁ is fixedly mounted on the cylinder head 1 and is made of a non-magnetic material. The housing 7 ₁ and the stem 5a of the engine valve 5 are movably accommodated in the housing 7 ₁ . The armature 8 to be disposed, the valve-closing electromagnet 9 ₁ disposed in the housing 7 ₁ capable of exerting an electromagnetic force that attracts the armature 8 and causes the engine valve 5 to close, and the armature 8 to be attracted. A valve-opening side electromagnet 10 ₁ which is arranged in the housing 7 ₁ so as to be able to exert an electromagnetic force for opening the engine valve 5 and a first spring 11 which urges the armature 8 toward the valve closing direction of the engine valve 5.
₁ , a second spring 12 ₁ for urging the armature 8 toward the valve opening direction of the engine valve 5, and a third spring 13 ₁ as an elastic means provided between both electromagnets 9 ₁ , 10 _1. .

The housing 7 ₁ is formed in a cylindrical shape with its lower end opened and its upper end closed, and the working chamber 14 is formed between the housing 7 ₁ and the upper surface of the cylinder head 1. Be combined with. The stem 5a of the engine valve 5 is slidably fitted to a guide cylinder 15 fixed to the cylinder head 1 and protrudes into the working chamber 14. In the working chamber 14, the stem 5a is disc-shaped. The armature 8 is integrally fixed.

Valve-closing electromagnet 9₁On the armature 8
While having a substantially U-shaped cross section open to the surface side
Inside the yoke 16 formed in a ring shape coaxial with the stem 5a
The coil 17 is housed in the
Has a collar 16a protruding outward from the upper end in the radial direction.
It is provided integrally and the outer peripheral surface of the collar portion 16a is attached to the housing 7 ₁
Valve-closing electromagnet 9 so as to make sliding contact with the inner peripheral surface of₁Ha
Housing 7₁Is slidably fitted on top of the. Open again
Side electromagnet 10₁Is open to the bottom side of the armature 8.
It has a substantially U-shaped cross section and the stem 5a is the same.
The coil 18 is formed in a ring-shaped yoke 18 surrounding the shaft.
And the yoke 19 is housed in the yoke 18.
A brim portion 18a that projects radially outward from the lower end is integrally formed.
The outer peripheral surface of the collar portion 18a is provided on the housing 7₁Inner circumference of
Valve-side electromagnet 10 so as to be in sliding contact with the surface₁Is a house
Ring 7₁Is slidably fitted to the lower part of the. I.e. valve closing
Side electromagnet 9₁And valve opening side electromagnet 10₁The armature
Armature that enables movement toward and away from A8
8, which are disposed on the upper and lower sides of the electromagnet 8 so as to oppose each other.₁, 1
0₁The maximum distance between them is the electromagnet 9 on the valve closing side.₁Has housing 7
₁The valve opening side electromagnet 10 while contacting the upper end closed portion of the₁
Is abutted against the upper surface of the cylinder head 1
Will be done.

A third spring 13 ₁ is intended to be formed in a coil shape by not ferromagnetic material, the flange portion 1 of the valve-closing electromagnet 9 ₁ of the flange portion 16a and the valve-opening electromagnet 10 ₁
The electromagnets 9 ₁ and 10 ₁ are contracted between 8a and are urged by the third spring 13 ₁ in the directions in which they are separated from each other. Moreover, the set load of the third spring 13 ₁ is set to be smaller than the maximum electromagnetic force exerted by the valve-closing side electromagnet 9 ₁ when energized.

The first and second springs 11 ₁ and 12 ₁ are each formed in a coil shape by a material that is not a ferromagnetic material, and the first spring 11 ₁ is located in the working chamber 14 and is located on the upper surface of the cylinder head 1. And between the armature 8 and
The second spring 12 ₁ is contracted in the working chamber 14 between the upper end closing portion of the housing 7 ₁ and the armature 8. Thus, the first and second springs 11 ₁ and 12 ₁ have both electromagnets 9 ₁ and
In the non-energized state of 10 ₁ serves to hold elastically the armature 8 to the neutral position between the two electromagnets 9 _1, 10 _1,
In that state, the engine valve 5 is in the half open state.

Such an electromagnetic drive means 6₁At
Mature 8 and valve-closing electromagnet 9₁Operation of Fig. 2
Next, referring to, the armature 8 is neutral.
Time t in position₁Valve closing electromagnet 9₁Start energizing
Then, the armature 8 is closed by the electromagnet 9 on the valve closing side.₁Is sucked in
Operate in the valve closing direction, but due to the suction reaction force, the valve closing side
Electromagnet 9₁Is the third spring 13₁Against the spring force of
Ring 7₁The armature from the regulation position where it abuts the upper end block of the
Move to the side of the vehicle 8 and time t₂As shown in Figure 3
Valve side electromagnet 9 on armature 8₁Abut. Thus
Closed electromagnet 9 ₁From the regulation position to the armature 8
First distance δ to move until it abuts₁Is the valve-closing electromagnet 9
₁The seat of the engine valve 5 at the time when the engine comes into contact with the armature 8
Second distance to position δ₂Greater than (δ₁> Δ₂)
Is defined. Moreover, the valve-closing electromagnet 9₁But armature
8, when the armature 8 is closed, that is, the engine valve 5 is closed.
The moving speed in the valve direction is set to be almost zero.
You.

When the valve-closing electromagnet 9 ₁ comes into contact with the armature 8 and is integrated with the armature 8, the third spring 1 is attached to the armature 8.
The spring force of 3 ₁ acts in the valve closing direction, and the spring force of the first spring 11 ₁ which is expanded and reduced in spring force is subtracted from the spring force of the second spring 12 ₁ which is compressed and increased in spring force. The spring force acts in the valve opening direction, and the spring force of the third spring 13 _{1 in} the valve closing direction at this time is the first and the second.
It is set to be larger than the force in the valve opening direction due to the difference in spring force between the springs 11 ₁ and 12 ₁ . Therefore, the valve closing electromagnet 9
_{After 1} contacts armature 8, armature 8
That is, the engine valve 5 is driven in the valve closing direction by the mechanical force of the spring force, and at time t ₃ , the engine valve 5 is seated in the valve closing position as shown in FIG.

When the engine valve 5 is in the valve-closed seated state, between the upper end closing portion of the housing 7 ₁ and the valve-closing side electromagnet 9 ₁ ,
There is an interval of a value δ ₃ obtained by subtracting the second distance δ ₂ from the first distance δ ₁ , and this distance δ ₃ is on the valve closing side when the engine valve 5 in the maximum thermal expansion state is seated closed. It is set to such an extent that the electromagnet 9 ₁ can be prevented from coming into contact with the upper end closed portion of the housing 7 ₁ .

By the way, since the valve-closing electromagnet 9 ₁ and the armature 8 are in contact with each other without clearance after the engine valve 5 is seated on the valve, the valve-closing electromagnet 9 ₁ The valve seated state of the engine valve 5 can be maintained even if the energization amount is reduced, and the energization amount to the valve closing side electromagnet 9 ₁ is reduced at time t ₄ .

When the engine valve 5 is opened, the valve-closing electromagnet 9 ₁ may be deenergized and the valve-opening electromagnet 10 ₁ may be energized. Then, the armature 8 is opened. is attracted to the electromagnet 10 ₁ side, the engine valve 5 is opened actuated. At this time, the valve-opening electromagnet 1 is opened during the valve-opening operation of the engine valve 5.
0 ₁ moves to the armature 8 side by the suction reaction force and contacts the armature 8. After that, the valve opening side electromagnet 10 ₁ contacts the upper surface of the cylinder head 1 by the spring force of the third spring 13 _1. Will be moved to.

Next, the operation of the first embodiment will be described. When the engine valve 5 is closed, the valve-closing electromagnet 9 ₁ is brought into contact with the armature 8 before the valve is seated, and then the spring is held until it is seated. The engine valve 5 is mechanically closed by the force. Therefore, the load in the valve closing direction immediately before the seating of the engine valve 5 is performed by the first, second and third springs 1.
It is decided by the spring force setting of 1 ₁ , 12 ₁ and 13 ₁ and the operating speed immediately before the valve closing seating can be controlled by the mechanical load control. Therefore, the energization current control of the valve closing side electromagnet 9 ₁ can be controlled. The seating speed control can be performed more easily and more reliably than the above. Moreover, since the valve-closing electromagnet 9 ₁ comes into contact with the armature 8 without clearance, it is possible to set the energizing current of the valve-closing electromagnet 9 ₁ for holding the engine valve 5 in the valve closed state to be relatively low.

Further, by the speed of the armature 8 when valve-closing electromagnet 9 ₁ comes into contact with the armature 8 is set to approximately 0, relatively low noise generated from this contact with the valve-closing electromagnet 9 ₁ of the armature 8 can do. Further, the valve-closing electromagnet 9 ₁ moves from the regulation position where it abuts the upper end closed portion of the housing 7 ₁ until it comes into abutment with the armature 1.
Since the distance δ ₁ is set to be larger than the second distance δ ₂ to the seating position of the engine valve 5 at the time when the valve-closing side electromagnet 9 ₁ comes into contact with the armature 8, the reliable reliability of the engine valve 5 is ensured. The valve seated state can be obtained, and the value δ ₃ obtained by subtracting the second distance δ ₂ from the first distance δ ₁ is the valve-closing electromagnet 9 when the engine valve 5 in the maximum thermal expansion state is seated in the valve closed state. _{by 1} is set to such an extent that can avoid contact to the upper closed portion of the housing _71, it is possible to compensate for thermal expansion of the engine valve 5 to obtain a reliable closed seating state.

Further, the first, second and third springs 11 ₁ ,
The reference numerals 12 ₁ and 13 ₁ are formed of a material that is not a ferromagnetic material, and the valve-closing side electromagnet 9 ₁ and the valve-opening side electromagnet 1
0 magnetic field on their spring 11 ₁ to 1 caused by the _first current
3 ₁ has no adverse effect.

As another embodiment of the present invention, the valve opening side electromagnet 10 ₁ may be fixed to the lower end portion of the housing 7 ₁ .

FIG. 5 shows a second embodiment of the present invention, in which parts corresponding to those in the first embodiment are designated by the same reference numerals.

The electromagnetic drive means 6 ₂ is fixedly mounted on the cylinder head 1 and is made of a non-magnetic material. The housing 7 ₁ and the stem 5a of the engine valve 5 are movably accommodated in the housing 7 ₁ . The armature 8 and the valve-closing electromagnet 9 ₂ that is arranged in the housing 7 ₁ so as to be able to exert an electromagnetic force that attracts the armature 8 to close the engine valve 5 and sucks the armature 8. A valve-opening side electromagnet 10 ₁ which is arranged in the housing 7 ₁ so as to be able to exert an electromagnetic force for opening the engine valve 5 and a first spring 11 which urges the armature 8 toward the valve closing direction of the engine valve 5.
₁ , a second spring 12 ₁ for urging the armature 8 toward the valve opening direction of the engine valve 5, and a third spring 13 ₁ as an elastic means provided between the electromagnets 9 ₂ , 10 _1. .

The valve-closing electromagnet 9 ₂ has a substantially U-shaped cross-section open to the upper surface side of the armature 8, and the coil 17 is housed in a yoke 16 formed in a ring shape coaxial with the stem 5a. And the yoke 16
, The sliding contact flange portion 16a on the inner peripheral surface of the housing ₇₁ Te projecting radially outwardly from its upper end is provided integrally,
The outer peripheral surface of the collar portion 16a, O-ring 20 serving as a resistance member which exerts the sliding resistance in contact with the inner peripheral surface of the housing ₇₁ is mounted.

According to the second embodiment, in addition to the effect of the first embodiment, the valve closing seating speed of the engine valve 5 can be further reduced.

FIG. 6 shows a third embodiment of the present invention, and the portions corresponding to the respective embodiments described above are designated by the same reference numerals.

The electromagnetic drive means 6 ₃ is fixed to the housing 7 ₂ made of a non-magnetic material fixed on the cylinder head 1 and the stem 5 a of the engine valve 5 so as to be movably accommodated in the housing 7 ₂ . The armature 8 to be disposed, the valve-closing electromagnet 9 ₃ disposed in the housing 7 ₂ so as to be able to exert an electromagnetic force that attracts the armature 8 and causes the engine valve 5 to close, and the armature 8 to be attracted. A valve-opening side electromagnet 10 ₂ arranged in the housing 7 ₂ so as to be able to exert an electromagnetic force for opening the engine valve 5 and both electromagnets 9 ₃ , 1
0 ₂ and an elastic means 13 ₂ .

Valve closing electromagnet 9_ThreeOn the armature 8
While having a substantially U-shaped cross section open to the surface side
Inside the yoke 16 formed in a ring shape coaxial with the stem 5a
The coil 17 is housed in the
Has a collar 16b protruding radially inward from its upper end.
The outer surface of the yoke 16 is provided integrally with the housing 7₂of
The electromagnet 9 on the valve closing side, so as to be in sliding contact with the inner surface_ThreeIs a house
Ring 7₂Is slidably fitted on top of the. Also, the valve opening side power
Magnet 10₂Is approximately U opened to the lower surface side of the armature 8.
It has a V-shaped cross section and the stem 5a is coaxial.
The coil 1 is provided in the surrounding yoke 18 formed in a ring shape.
9 is stored, and the yoke 18 has
A brim portion 18b protruding inward in the radial direction from the lower end is integrally provided
The outer surface of the yoke 18 to the housing 7₂Sliding contact with the inner surface of
Valve-side electromagnet 10₂Has housing 7₂
Is slidably fitted to the lower part of the. That is, the valve-closing electromagnet
9 _ThreeAnd valve opening side electromagnet 10₂Against armature 8
Up and down of the armature 8 to enable close / separate movement
Electromagnets 9 arranged opposite each other_Three, 10₂Among
The maximum interval is the valve-closing electromagnet 9_ThreeHas housing 7₂Top of
The valve opening side electromagnet 10 is contacted with the closed portion and₂Is Shirin
Be regulated by contacting the upper surface of the duhead 1.
become.

The elastic means 13 ₂ comprises a first spring 11 ₂ contracted between the collar portion 18b of the valve opening side electromagnet 10 ₂ and the armature 8 and a collar portion 16 of the valve closing side electromagnet 9 ₃ .
second spring 12 ₂ compressed between b and armature 8
The elastic means 13 ₂ exerts a spring force in a direction in which the valve-closing side electromagnet 9 ₃ and the valve-opening side electromagnet 10 ₂ are separated from each other, and both electromagnets 9 ₃ and 10 are formed.
_In the non-energized state of ₂ , the spring force that holds the armature 8 in a predetermined neutral position is exerted.

According to the third embodiment, the valve closing electromagnet 9
_ThreeWhen the engine valve 5 is closed by energizing the
Electromagnet 9_ThreeMoves to the armature 8 side,
A) Abutting on the contact 8 and then in the extended state, the spring force
The relatively weakened first spring 11 ₂Engine valve 5 is closed due to
I will sit down. Therefore, the same as in the first embodiment described above.
The effect can be exerted, and furthermore, the elastic means 13₂Is
-Since it also functions to hold the mature 8 in the neutral position,
It is possible to reduce the number of springs and contribute to the reduction of the number of parts.
it can.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible to do.

[0041]

As described above, according to the first, third and fourth aspects of the invention, the valve-closing electromagnet is brought into contact with the armature before the valve seat of the engine valve is seated, and then the spring is seated until it is seated. By mechanically closing the engine valve by force, easy and reliable seating speed control is possible.
Moreover, the energizing current of the valve-closing electromagnet for keeping the engine valve closed can be set relatively low by bringing the valve-closing electromagnet into contact with the armature without clearance.

According to the second aspect of the present invention, the number of parts can be reduced by having the elastic means also serve to hold the armature in the neutral position.

According to the fifth aspect of the invention, the seat valve of the engine valve at the time when the valve-closing electromagnet comes into contact with the armature is set to the first distance that the valve-closing electromagnet moves from the regulating position until it comes into contact with the armature. By setting the distance larger than the second distance to the position, it is possible to obtain a reliable closed valve seated state of the engine valve.

According to the sixth aspect of the present invention, since the moving speed of the engine valve in the valve closing direction when the valve-closing electromagnet contacts the armature is approximately 0, the valve-closing electromagnet for the armature is close to zero. The contact sound of can be reduced.

According to the seventh aspect of the present invention, by setting the value obtained by subtracting the second distance from the first distance, even if the engine valve is in the maximum thermal expansion state, the valve-closing electromagnet comes into contact with the restriction position. Is avoided, and thermal expansion can be compensated to obtain a reliable closed valve seated state.

According to the eighth aspect of the present invention, by setting the spring force of each spring and the electromagnetic force of the valve-closing electromagnet, the engine is contacted with the valve-closing electromagnet before the valve is seated on the engine valve. It is possible to surely obtain the operation in which the valve is seated by the spring force.

Further, according to the ninth aspect of the invention, the valve seating speed of the engine valve can be further moderated by making the resistance member exert sliding resistance.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a valve operating device in a state where an engine valve is in a neutral position in a first embodiment.

FIG. 2 is a diagram showing a lift of an engine valve and a moving state of a valve-closing side electromagnet during valve closing operation.

FIG. 3 is a longitudinal sectional view corresponding to FIG. 1 in a state in which the engine valve has moved from the neutral position to the valve closing position side.

FIG. 4 is a vertical cross-sectional view corresponding to FIG. 1 in a state where the engine valve is in the valve closing position.

FIG. 5 is a vertical sectional view corresponding to FIG. 1 of the second embodiment.

FIG. 6 is a vertical sectional view corresponding to FIG. 1 of the third embodiment.

[Explanation of symbols]

5 ... Engine valve 7 ₁ ... Housing 8 ... Armature 9 ₁ , 9 ₂ , 9 ₃ ... Valve-closing side electromagnet 10 ₁ , 10 ₂ ... Valve-opening side electromagnet 11 ₁ , 11 ₂ ..First springs 12 ₁ , 12 ₂ ... Second springs 13 ₁ ... Third springs as elastic means 13 ₂ ... Elastic means 20 ... O-rings as resistance member

Claims (9)

[Claims] 1. An armor interlocked with and connected to an engine valve (5).
Operate the Chuu (8) and the engine valve (5) in the closing direction when energized.
Closing that exerts electromagnetic force to move on the armature (8)
Valve side electromagnet (9₁, 9₂, 9_Three) And the engine valve when energized
The electromagnetic force that actuates (5) in the valve opening direction is applied to the armature.
Valve-side electromagnet (10 ₁, 10₂)When
Equipped with both electromagnets (9₁, 9₂, 9_Three; 10₁, 1
0₂) Is de-energized, the armature (8) is in a neutral position
In a valve train of an internal combustion engine that is elastically held in a position,
Valve side and valve side electromagnets (9₁, 9₂, 9_Three; 10₁,
10₂) Are those electromagnets (9₁, 9₂, 9_Three; 10
₁, 10₂The maximum distance between
It is possible to move close to and away from the Chua (8).
Both electromagnets are arranged opposite each other on both sides of the mature (8).
(9₁, 9₂, 9_Three; 10₁, 10₂) Between those
Magnet (9₁, 9₂, 9_Three; 10₁, 10₂) Away from each other
Repulsion means (13₁, 13₂) Is set
A valve operating device for an internal combustion engine, which is characterized in that 2. The elastic means (13 ₂ ) exerts a spring force for holding the armature (8) in a predetermined neutral position in a non-energized state of both electromagnets (9 ₃ , 10 ₂ ), thereby producing both electromagnets (9). _3, 10 ₂₎ and the armature (8) a pair of springs (11 _2, 12 ₂₎ consisting of a valve gear of an internal combustion engine according to claim 1, wherein the respectively provided between. 3. The armature (8) is urged from both sides by exerting a spring force that holds the armature (8) in a predetermined neutral position when both electromagnets (9 ₁ , 9 ₂ ; 10 ₁ ) are not energized. The valve operating system for an internal combustion engine according to claim 1, further comprising a pair of springs (11 ₁ , 12 ₁ ). 4. An armature (8) interlocked with and connected to an engine valve (5), and a valve-closing electromagnet that exerts an electromagnetic force on the armature (8) for operating the engine valve (5) in the valve closing direction when energized. (9 ₁ , 9 ₂ ), a valve-opening side electromagnet (10 ₁ ) that exerts an electromagnetic force for operating the engine valve (5) in the valve opening direction upon energization on the armature (8), and both electromagnets (9 ₁ , 9 2). ₂ ; 10 ₁ ) _{First and second} for exerting a spring force for holding the armature (8) in a predetermined neutral position in a non-energized state to urge the armature (8) from both sides
In a valve operating system for an internal combustion engine including springs (11 ₁ , 12 ₁ ), a valve opening side electromagnet (10 ₁ , 10 ₂ ) is fixedly arranged facing one side of an armature (8), and a valve opening side electromagnet is disposed. The maximum distance between the armature (8) and (10 ₁ , 10 ₂ ) is regulated, and movement toward and away from the armature (8) is enabled, and a valve-closing electromagnet (9) is provided on the other side of the armature (8).
_1, 9 ₂₎ is opposed, valve closing electromagnet (9 _1, 9
An internal combustion engine characterized in that a third spring (13 ₁ ) for urging the valve-closing electromagnets (9 ₁ , 9 ₂ ) in a direction away from the armature (8) is provided between the fixed position and the fixed position ₂ ). Valve device. 5. A valve-closing electromagnet (9₁, 9₂, 9_Three) Opens
Valve side electromagnet (10₁, 10₂) And the maximum distance between
Valve side electromagnet (9 ₁, 9₂)
The valve-closing electromagnet (9₁, 9₂,
9_Three) To the reaction force when the armature (8) is sucked
Closed valve side electromagnet (9₁, 9₂, 9_Three) Is the regulation position
First distance from to contact armature (8)
Separation (δ₁) Is the valve-closing electromagnet (9₁, 9₂, 9_Three) Is
-Attachment of the engine valve (5) at the time of contact with the mature (8)
Second distance to seat position (δ₂) Is set larger than
The method according to any one of claims 1 to 4, characterized in that
A valve train for an internal combustion engine. 6. The moving speed of the engine valve (5) in the valve closing direction when the valve-closing electromagnets (9 ₁ , 9 ₂ , 9 ₃ ) come into contact with the armature (8) is set to near zero. The valve operating system for an internal combustion engine according to claim 5, wherein 7. The first distance (δ ₁ ) to the second distance (δ ₂ )
Engine valve (5) in which the value obtained by subtracting is in the maximum thermal expansion state
6. The valve of the internal combustion engine according to claim 5, wherein the valve-closing electromagnets (9 ₁ , 9 ₂ , 9 ₃ ) are set to such an extent that they can avoid contact with the restriction position when the valve is seated. apparatus. 8. A third spring (13)₁) Set load is closed
Side electromagnet (9₁, 9 ₂) Is the maximum when it is energized
It is set smaller than the electromagnetic force, and the valve-closing electromagnet (9₁, 9
₂) Is in contact with the armature (8), the third spring
(13₁), The spring force exerted by
Second spring (11₁, 12₁) Armature due to the difference in spring force
Set larger than the force in the valve opening direction that acts on the Chua (8)
5. A valve train for an internal combustion engine according to claim 4, wherein
apparatus. 9. A fixation of the housing (7 ₁₎ in slidably fitted in the engaged the valve-closing electromagnet (9 _2), the resistance member to exert the sliding resistance in contact with the housing (7 ₁₎ (2
0) is provided, The valve operating system for an internal combustion engine according to any one of claims 1 to 4, wherein: