JP2000018012A - Solenoid driving valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce displacement sped of a valve element when the valve element achieves a displacement end without increasing demand, in the relation to a solenoid driving valve functioned as an intake valve and an exhaust valve of an internal combustion engine. SOLUTION: This solenoid driving valve 10 is provided with a receive plate 72, a mass body 76, and a damper mechanism 62 composed of a first spring 74 for connecting them to each other. A stem member 60 connected to an armature shaft 28 abuts on the receive plate 72 when an armature 40 achieves near an upper core 46. When the stem member 60 abuts on the receive plate 72, energizing force generated by the first spring 74 is acted on a direction where a displacement of the stem member 60 is prevented, and displacement speed of a valve element 18 is reduced. By the energizing force, in the mass body 76, its displacement is continued by its proliferation after the armature 40 achieves the upper core 46. Accordingly, a contraction rate of the first spring 74 is reduced, and energizing force acted on the stem member 60 is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electromagnetically driven valve, and more particularly to an electromagnetically driven valve suitable as an intake valve or an exhaust valve of an internal combustion engine.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Application Laid-Open No.
As disclosed in Japanese Patent No. 19, an apparatus for electrically opening and closing an intake valve or an exhaust valve of an internal combustion engine is known. The conventional device includes a valve element, a valve spring, a drive mechanism, and a buffer mechanism. The valve body is urged in a valve closing direction by a valve spring. The driving mechanism generates a driving force for displacing the valve body in the valve opening direction. Further, the buffer mechanism generates a repulsive force for urging the valve body in the valve opening direction immediately before the valve body reaches the valve closing end.

Therefore, according to the above configuration, the valve body can be properly opened and closed by appropriately controlling the drive mechanism, and the provision of the buffer mechanism allows the valve body to reach the valve closing end. Can be reduced. For this reason, according to the above-mentioned conventional device, the valve element can be properly opened and closed without generating a large operating noise.

[0004] Conventionally, an electromagnetically driven valve has been known as a mechanism for electrically opening and closing an intake valve or an exhaust valve of an internal combustion engine. The electromagnetically driven valve is an armature that displaces with the valve body, an elastic body that biases the armature to a neutral position,
And electromagnets disposed above and below the armature. The electromagnet includes an electromagnetic coil and a core holding the electromagnetic coil. According to the above-described electromagnetically driven valve, the valve body can be opened and closed by the electromagnets disposed above and below the armature alternately generating electromagnetic force.

In order to ensure excellent quietness in the above-mentioned electromagnetically driven valve, as in the case of the above-mentioned conventional device, when the valve body reaches the displacement end, that is, when the armature comes into contact with the core. Preferably, the displacement speed of the valve body is low. In order to reduce the displacement speed of the valve body of the electromagnetically driven valve, a buffer mechanism that generates a repulsive force in the direction opposite to the displacement direction of the valve body immediately before the valve body reaches the displacement end, similarly to the above-described conventional device. Is effective.

[0006]

However, the above-described cushioning mechanism not only generates a repulsive force in the direction opposite to the displacement direction of the valve body when the valve body reaches the displacement end, but also causes the valve body to move toward the displacement end. , A repulsive force in the opposite direction is always generated. In order to securely hold the valve body of the electromagnetically driven valve at the displacement end against such a repulsive force, it is necessary to generate a large electromagnetic attraction force between the armature and the electromagnet. For this reason, when the above-mentioned buffer mechanism is used to reduce the displacement speed of the valve body of the electromagnetically driven valve, power consumption increases.

[0007] The present invention has been made in view of the above points, and an electromagnetically driven valve capable of reducing the displacement speed of a valve body when an armature comes into contact with a core without increasing power consumption. The purpose is to provide.

[0008]

The above object is achieved by the present invention.
As described in the above, in an electromagnetically driven valve that includes a valve element and an armature connected to the valve element, and that opens and closes the valve element by cooperating electromagnetic force and spring force, the armature has a displacement end. And a mass member connected to the armature on the side opposite to the armature via a first elastic body when the armature reaches the vicinity of the armature. This is achieved by an electromagnetically driven valve characterized by the following.

In the present invention, when the armature reaches the vicinity of the displacement end, the armature comes into contact with the receiving member. When the armature contacts the receiving member, the receiving member is displaced toward the mass body. When the receiving member is displaced in this manner, the first
The elastic body contracts to generate an elastic force. This elastic force is transmitted to the armature as a force in a direction that prevents its displacement. Therefore, the displacement speed of the armature is reduced. Further, by transmitting the reaction force to the elastic force to the mass body, the mass body starts displacement in a direction away from the armature. Due to its inertia, the mass body continues to be displaced in the same direction even after the armature reaches the displacement end. In this case, the amount of contraction of the first elastic body decreases, so that the elastic force transmitted to the armature decreases. Therefore, an increase in the electromagnetic force required to hold the valve body at the displacement end is suppressed.

[0010] The object of the present invention is as described in claim 2.
2. The electromagnetically driven valve according to claim 1, further comprising a second elastic body that urges the mass body toward the armature. In the present invention, when the mass body is displaced in a direction away from the armature, the elastic force generated by the second elastic body acts on the mass body in a direction that impedes the displacement, that is, toward the armature side. When the above-mentioned elastic force acts on the mass body, the mass body returns to the initial position early, so that the receiving member also returns to the initial position early. For this reason, even when the armature next reaches the vicinity of the displacement end, a force in a direction that prevents the displacement is reliably transmitted to the armature.

According to a third aspect of the present invention, in the electromagnetically driven valve according to the first or second aspect, the mass body is prevented from being displaced toward the armature beyond its initial position. This is achieved by an electromagnetically driven valve having a displacement limiting mechanism. In the present invention, the displacement limiting mechanism prevents the mass from displacing beyond its initial position toward the armature. For this reason,
After the mass is displaced toward the armature, the displacement quickly converges to the initial position. Therefore, even when the armature next reaches the vicinity of the displacement end,
A force in a direction that impedes the displacement is transmitted.

[0012]

FIG. 1 shows an overall configuration diagram of an electromagnetically driven valve 10 according to an embodiment of the present invention. Electromagnetic drive valve 10
Is a valve mechanism that functions as an intake valve or an exhaust valve of the internal combustion engine. The electromagnetically driven valve 10 is mounted on a cylinder head 12. The cylinder head 12 is provided with a port 14 and a combustion chamber 16. The electromagnetically driven valve 10 is
Valve body 1 for conducting or shutting off port 14 and combustion chamber 16
8 is provided.

A valve shaft 20 is provided integrally with the valve element 18. A valve guide 22 is provided inside the cylinder head 12. The valve shaft 20 includes a valve guide 22
Are slidably held in the axial direction. A lower retainer 24 is fixed to the upper end of the valve shaft 20. A lower spring 26 is provided below the lower retainer 24. The lower spring 26 urges the valve shaft 20 and the valve element 18 upward through the lower retainer 24 in FIG. 1, that is, in the valve closing direction of the valve element 18.

An armature shaft 28 is provided on the upper end surface of the valve shaft 20.
Is in contact with the lower end surface. The armature shaft 28 is a rod-shaped member made of a non-magnetic material. An upper retainer 30 is fixed to an upper end of the armature shaft 28. An upper spring 32 is disposed above the upper retainer 30. The upper end surface of the upper spring 32 is in contact with an adjuster bolt 36 via a seat 34. The upper spring 32 urges the armature shaft 28 via the retainer 30 downward in FIG. Therefore, the upper spring 32 moves the valve shaft 20 and the valve element 18 downward in FIG.
8 in the valve opening direction.

An armature holding portion 28a is formed on the outer periphery of the armature shaft 28 so as to project in the radial direction. An armature 40 is joined around the armature holding portion 28a. The armature 40 is an annular member made of a soft magnetic material. Above the armature 40, the first
An electromagnet 44 is provided. A second electromagnet 52 is provided below the armature 40. The first electromagnet 44 has an upper core 46. Second electromagnet 5
2 has a lower core 54. Each of the upper core 46 and the lower core 54 is a columnar member made of a magnetic material. The upper core 46 has an upper coil 48.
However, a lower coil 56 is housed in the lower core 54.

A bearing 50 is provided at the center of the upper core 46, and a bearing 58 is provided at a center of the lower core 54. The armature shaft 28 includes a bearing 50,
58 is slidably held in the axial direction. The adjuster bolt 36 described above is adjusted so that the neutral position of the armature 40 is located at an intermediate point between the upper core 46 and the lower core 54.

On the upper end surface of the armature shaft 28, the shaft member 6 is provided.
0 is fixed coaxially with the armature shaft 28. At the upper end of the shaft member 60, a contact portion 60a is provided. A through hole is provided at the center of the adjuster bolt 36 and the seat 34. The shaft member 60 extends upward through the through hole. Above the adjuster bolt 36, a damper mechanism 62 is provided. Damper mechanism 62
Includes a housing 64. A through hole 64 a is provided in the bottom surface of the housing 64. Through hole 64a
, The contact portion 60a of the shaft member 60 described above has entered. A stopper plate 66 is fixed inside the housing 64. The stopper plate 66 is a member made of a material having a small coefficient of restitution. The first hollow chamber 6 is located below and above the stopper plate 66.
8 and a second hollow chamber 70 are formed. At the center of the stopper plate 66, a through hole 66a is provided.

In the first hollow chamber 68, a receiving plate 72 is disposed so as to close the through hole 64a of the housing 64 from above. Further, the mass body 76 is provided in the second hollow chamber 70.
Is disposed so as to close the through hole 66a of the stopper plate 66 from above. Receiving plate 72 and mass body 76
Are connected to each other by a first spring 74 disposed through the through hole 66a of the stopper plate 66. The first spring 74 generates an urging force in a direction that prevents the displacement between the receiving plate 72 and the mass body 76 from a predetermined distance. At the top of the mass 76, a second
A spring 78 is provided. Second spring 78
Generates an urging force for urging the mass body 76 downward in FIG.

The first spring 74 includes a receiving plate 72.
Is in contact with the bottom surface of the housing 64 and the mass body 76 is in contact with the stopper plate 66 (hereinafter, this state is referred to as an “initial state”), and the direction in which the receiving plate 72 and the mass body 76 are separated from each other. Is configured to generate an urging force. Further, the second spring 78 is configured such that in the initial state, the sum of the urging force generated by the second spring 78 and the weight of the mass body 76 is larger than the urging force generated by the first spring 74. . Therefore, in the initial state, the receiving plate 72 is pressed against the bottom surface of the housing 64 and the mass body 76 is pressed against the stopper plate 66.

The damper mechanism 62 forms a predetermined clearance between the contact portion 60a of the shaft member 60 and the receiving plate 72 in a state where the armature 40 is held at the neutral position between the upper spring 32 and the lower spring 26. When the armature 40 is displaced from the neutral position toward the upper core 46 by a predetermined distance, the contact portion 60 a is configured to contact the lower surface of the receiving plate 72.

Next, the operation of the electromagnetically driven valve 10 will be described. When the exciting current is not supplied to the upper coil 48 and the lower coil 56, the armature 40 is moved to a neutral position between the upper spring 32 and the lower spring 26.
That is, it is held at the center between the upper core 46 and the lower core 54. In this state, when the supply of the exciting current to the upper coil 48 is started, an electromagnetic attractive force is generated between the armature 40 and the upper core 46 to draw the armature 40 toward the upper core 46. Therefore, the armature 40 starts to be displaced toward the upper core 46. When the armature 40 is displaced until it comes into contact with the upper core 46, the valve element 18 sits on the valve seat. In this case, the electromagnetically driven valve 10 is fully closed. Hereinafter, the position where the armature 40 contacts the upper core 46 is referred to as the armature 40 or the valve closing end of the valve element 18.

When the valve element 18 is held at the valve closing end,
The armature 40 is urged toward the neutral position by the urging force generated by the upper spring 32. In such a situation, when the supply of the exciting current to the upper coil 48 is stopped, the electromagnetic force for holding the armature 40 at the valve closing end disappears. Therefore, the armature 40 starts to be displaced toward the valve opening direction, that is, toward the lower core 54 by the urging force generated by the upper spring 32.

When the exciting current is supplied to the lower coil 56 when the armature 40 is displaced by a predetermined amount in the valve opening direction,
Armature 4 between armature 40 and lower core 54
Electromagnetic attraction is generated to draw 0 to the lower core 54 side. Therefore, according to the electromagnetically driven valve 10, the lower coil 5
By supplying an appropriate exciting current to the armature 6, the armature 40 can be displaced until it comes into contact with the lower core 54. When the armature 40 is displaced until it comes into contact with the lower core 54, the electromagnetically driven valve 10 is fully opened. Less than,
The position where the armature 40 contacts the lower core 54 is referred to as the armature 40 or the valve-open end of the valve element 18.

When the supply of the exciting current to the lower coil 56 is stopped after the valve element 18 is held at the valve opening end, the electromagnetic force for holding the armature 40 at the valve opening end disappears. Therefore, the armature 40 starts to be displaced in the valve closing direction by the urging force generated by the lower spring 26. Therefore, according to the electromagnetically driven valve 10, the valve element 18 can be opened and closed by alternately supplying an appropriate exciting current to the upper coil 48 and the lower coil 56.

Incidentally, the valve element 18 and the armature 40
When the valve reaches the valve closing end or the valve opening end, a seating sound of the valve element 18 and a contact sound between the armature 40 and the upper core 46 or the lower core 54 are generated. In order to ensure excellent quietness in the electromagnetically driven valve 10, it is necessary to suppress these operating noises. In order to suppress these operating noises, it is effective to reduce the displacement speed when the valve element 18 or the armature 40 reaches the valve closing end or the valve opening end.

As a method of reducing the displacement speed, for example, a spring that generates a repulsive force in the direction opposite to the displacement direction when the valve element 18 and the armature 40 reach the vicinity of the valve closing end or the valve opening end is used. It is possible to provide.
However, when the displacement speed of the valve element 18 and the armature 40 is reduced simply by providing a spring, the armature 40 and the upper core 46 are connected to each other in order to hold the valve element 18 and the armature 40 at the valve closing end or the valve opening end. Between the armature 40 and the lower core 54 between the armature 40 and the lower core 54. For this reason, in the above method, the power consumption of the electromagnetically driven valve 10 is increased.

On the other hand, the electromagnetically driven valve 10 of the present embodiment
Is that the displacement speed of the valve body 18 and the armature 40 when the valve body 18 reaches the valve opening end or the valve closing end can be reduced without increasing power consumption by using the damper mechanism 62. It has features. Hereinafter, the characteristic portion of this embodiment will be described with reference to FIGS.

In this embodiment, in the initial state, the receiving plate 72 is pressed against the inner bottom surface of the housing 64 and the mass body 76 is pressed against the upper surface of the stopper plate 66 as described above. Hereinafter, the position of the receiving plate 72 in the initial state is referred to as a plate original position, and the position of the mass body 76 in the initial state is referred to as a mass original position.

FIG. 2 is a view for explaining the operation of the damper mechanism 62 when the valve element 18 is displaced between the valve opening end and the valve closing end. FIG. 2A shows a time chart of the displacement X1 of the valve element 18 when the valve element 18 is displaced between the valve opening end and the valve closing end. FIGS. 2B and 2C show time charts of the displacement X2 of the receiving plate 72 and the displacement X3 of the mass body 76, respectively. 2 (B) and 2 (C), the electromagnetically driven valve 10 of this embodiment is shown by a solid line,
The electromagnetically driven valve (hereinafter, referred to as a first comparison valve) having a configuration in which the stopper plate 66 and the second spring 78 are removed from the electromagnetically driven valve 10 is indicated by a broken line, and the stopper plate 66 is removed from the electromagnetically driven valve 10. Are indicated by alternate long and short dash lines respectively (hereinafter, referred to as a second comparison valve).

As described above, in this embodiment, when the armature 40 is displaced toward the upper core 46 by a predetermined distance from the neutral position, the shaft member 6 connected to the armature shaft 28
0 abuts on the receiving plate 72 of the damper mechanism 62.
(Time t0 in FIG. 2). When the contact portion 60a of the shaft member 60 comes into contact with the receiving plate 72, the receiving plate 72 is pressed by the shaft member 60 and the armature shaft 28, so that the receiving plate 72 moves upward in FIG. Begins to displace.

FIG. 3 is an enlarged sectional view of the damper mechanism 62 realized after the shaft member 60 of the electromagnetically driven valve 10 according to the present embodiment comes into contact with the receiving plate 72. When the receiving plate 72 is displaced toward the second hollow chamber 70, the receiving plate 7
The distance between 2 and mass 76 is reduced. When the distance between the receiving plate 72 and the mass body 76 decreases, the first
As the spring 74 contracts, its urging force increases. Then, the biasing force is transmitted to the shaft member 60 as a force that prevents the displacement thereof.

When the urging force generated by the first spring 74 becomes larger than the sum of the weight of the mass body 76 and the urging force generated by the second spring 78, the mass body 76 is displaced upward as shown in FIG. start. The receiving plate 72 has a sufficiently smaller mass than the mass body 76. For this reason, in the process in which the mass body 76 is displaced upward in FIG.
Vibration is performed at a period determined by the spring constant of No. 4. At this time, the receiving plate 72 repeatedly collides with the shaft member 60,
The displacement speed of the shaft member 60 decreases (at time t in FIG. 2).
0 to t1). For this reason, according to the present embodiment, it is possible to reduce the operation noise when the armature 40 and the valve element 18 reach the valve closing end.

In FIG. 2, when the armature 40 comes into contact with the upper core 46 at time t1, the displacement of the shaft member 60 stops. When the displacement of the shaft member 60 is stopped, the receiving plate 72 stops being displaced by being pressed by the contact portion 60a of the shaft member 60 by the urging force generated by the first spring 74. Even after the displacement of the receiving plate 72 stops, that is, even after the valve element 18 reaches the valve closing end, the mass body 76 continues to be displaced upward due to its inertia. As the mass 76 continues to be displaced upward, the distance between the mass 76 and the receiving plate 72 increases. In this case, since the urging force generated by the first spring 74 decreases with the upward displacement of the mass body 76, the force applied by the receiving plate 72 to the shaft member 60 decreases accordingly. Therefore, after the armature 40 contacts the upper core 46,
The electromagnetic attraction force to be applied to the armature 40 for holding the valve element 18 at the valve closing end is suppressed to a small value.
Power consumption is reduced.

As described above, according to the electromagnetically driven valve 10, the collision between the receiving plate 72 and the shaft member 60 causes the shaft member 60 to rotate.
, The operating sound when the valve element 18 and the armature 40 reach the valve closing end can be reduced, and the force transmitted to the shaft member 60 due to the inertial movement of the mass body 76 can be reduced. Thus, the power consumption of the electromagnetically driven valve 10 can be reduced. In the first and second comparison valves, when the shaft member 60 first contacts the receiving plate 72, the same operation as that of the electromagnetically driven valve 10 is realized. it can.

By the way, in order to reduce the power consumption of the electromagnetically driven valve 10 and to surely suppress its operation noise,
It is important that the shaft member 60 be reliably brought into contact with the receiving plate 72 each time the valve element 18 and the armature 40 reach the vicinity of the valve closing end. In order for the shaft member 60 to reliably contact the receiving plate 72, the valve body 18 and the armature 4
When 0 reaches the vicinity of the valve closing end, the receiving plate 72
Must return to the original plate position, and the mass 76 must return to the original mass position.

In the electromagnetically driven valve 10 of the present embodiment, FIG.
As shown in (C), even after the valve element 18 starts displacing from the valve-closing end to the valve-opening end, the mass body 76 continues to displace upward due to its inertia. Then, when the urging force generated by the second spring 78 increases with the upward displacement of the mass body 76, the mass body 76 reverses its displacement direction and starts displacing downward. At this time, the receiving plate 72
Is displaced downward together with the mass body 76 while repeating vibration without colliding with the contact portion 60a of the shaft member 60.

At time t2 in FIG.
6 arrives at the original mass position and abuts against the stopper plate 66. The stopper plate 66 is a member made of a material having a small coefficient of restitution as described above. For this reason,
After reaching the original mass body position, the mass body 76 is held at the original mass body position without rebounding to the stopper plate 66. At this time, the receiving plate 72 is
4 retains the plate in its original position.

Therefore, according to the present embodiment, when the valve element 18 reaches the vicinity of the valve closing end in the next cycle (time t3 in FIG. 2), the shaft member 60 contacts the receiving plate 72. Can be done. Therefore, according to the electromagnetically driven valve 10 of the present embodiment, each time the valve element 18 and the armature 40 reach the valve closing end, the power consumption of the electromagnetically driven valve 10 is reliably reduced while the valve element 18 and the armature 40 are reduced. 40 can be reduced.

On the other hand, the first comparison valve shown by the broken line in FIG.
As described above, the second spring 78 and the stopper plate 6
6 is not provided. For this reason, when the mass body 76 of the first comparison valve is displaced upward, the force acting downward on the mass body 76 is reduced as compared with the case of the electromagnetically driven valve 10, so that the broken line in FIG. As shown by, the period until the mass body 76 of the first comparison valve returns to the original mass body position becomes longer. Therefore, when the armature 40 next reaches the vicinity of the valve closing end (time t3 in FIG. 2), the mass body 76 has not returned to the original mass body position, and accordingly, FIG. As shown by the broken line, the receiving plate 72 has not returned to the plate original position.

As described above, the second comparison valve indicated by a chain line in FIG.
8 are provided. For this reason, the mass body 7 of the second comparison valve
The cycle until 6 returns to the original mass position is the same as that of the electromagnetically driven valve 10 of this embodiment. However, the second comparison valve is not provided with the stopper plate 66. For this reason, even after the receiving plate 72 reaches the plate original position (time t2 in FIG. 2), the mass body 76 of the second comparison valve is maintained.
Continues vibration centering on the original position of the mass body, as indicated by the dashed line in FIG. 2 (C). Therefore, when the valve element 18 reaches the vicinity of the valve closing end in the next cycle (time t3 in FIG. 2), as shown by the dashed line in FIG.
Are located above the original mass position, and accordingly, the receiving plate 72 is also located above the original plate position.

As described above, the first comparison valve and the second
In the contrast valve, the shaft member 60 may not be able to contact the receiving plate 72 when the valve element 18 and the armature 40 reach the vicinity of the valve closing end. On the other hand, in the electromagnetically driven valve 10 of the present embodiment, as described above, the second
Since the spring 78 and the stopper plate 66 are provided, the mass body 76 and the receiving plate 72 are promptly held at the original position. Therefore, according to the present embodiment, the shaft member 60 can be reliably brought into contact with the receiving plate 72 even when the valve element 18 reaches the vicinity of the valve closing end next time. Therefore, according to the electromagnetically driven valve 10 of the present embodiment,
Each time the valve element 18 and the armature 40 reach the valve closing end, the displacement speed of the valve element 18 and the armature 40 can be reliably reduced.

In this embodiment, the center of the upper portion of the housing 64, the center of the mass body 76, and the receiving plate 72
By providing a through-hole penetrating in the axial direction at the center of each of them, and disposing a position detection sensor above the through-hole, it is possible to detect the displacement of the shaft member 60. That is, the electromagnetically driven valve 10 of the present embodiment has a configuration in which the displacement of the armature 40 and the valve element 18 can be easily detected.

In the above embodiment, the receiving plate 72 corresponds to the "receiving member" described in the claims, and the first spring 74 corresponds to the "first elastic body" described in the claims.
The spring 78 is the “second elastic body” described in the claims.
The stopper plate 66 corresponds to the “displacement limiting mechanism” described in the claims. By the way, in the above embodiment, the damper mechanism 62 is arranged on the valve closing end side, but the present invention is not limited to this, and the same mechanism as the damper mechanism 62 is replaced with the valve opening end side. It is good also as being arranged in.

[0044]

As described above, according to the first aspect of the present invention, the operation speed is reduced by reducing the displacement speed of the valve body when the valve body reaches the displacement end without increasing power consumption. Sound can be suppressed. According to the second and third aspects of the present invention, by returning the mass body to the initial position early, the above-described effect can be obtained reliably each time the valve body is driven to open and close.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an electromagnetically driven valve according to an embodiment of the present invention.

FIG. 2A is a time chart of the displacement of the valve body when the valve body is displaced between displacement ends. FIG. 2 (B)
It is the figure which compared the displacement of the receiving plate with the 1st comparison valve, the 2nd comparison valve, and the electromagnetic drive valve which is one Example of this invention. FIG. 2C is a diagram comparing the displacement of the mass body with the first comparison valve, the second comparison valve, and the electromagnetically driven valve according to one embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view of a damper mechanism showing a state after a shaft member included in an electromagnetically driven valve according to an embodiment of the present invention has contacted a receiving plate.

[Explanation of symbols]

 Reference Signs List 10 electromagnetically driven valve 18 valve element 28 armature shaft 40 armature 62 damper mechanism 66 stopper plate 72 receiving plate 74 first spring 76 mass body 78 second spring

Continued on the front page (72) Inventor Tatsuo Iida 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Hiroyuki Hattori 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation F-term (reference 3G016 AA18 BA02 BA05 CA13 CA27 CA29 3H106 DA07 DA25 DB02 DB12 DB26 DB32 DC02 DD02 EE19 EE20 EE33 GC10 KK17

Claims (3)

[Claims] 1. An electromagnetically driven valve, comprising: a valve element; and an armature connected to the valve element, wherein the electromagnetic element and the spring force cooperate to open and close the valve element. And a receiving member that contacts the armature when it reaches the vicinity of the armature, on the side opposite to the armature with respect to the receiving member,
An electromagnetically driven valve comprising: a mass body connected via a first elastic body. 2. The electromagnetically driven valve according to claim 1, further comprising a second elastic body for urging the mass body toward the armature. 3. The electromagnetically driven valve according to claim 1, further comprising: a displacement limiting mechanism that prevents the mass body from being displaced toward the armature beyond its initial position. valve.