JPH06307214A - Solenoid valve - Google Patents

Abstract

PURPOSE:To increase the effective conductor length of a coil by inclining a moving coil wound around a frame-like flat plate and a driving part of a solenoid valve to be driven by magnetic flux rectangular thereto. CONSTITUTION:Armatures 3, 7 on the upper part of a stem of an intake/exhaust valve are respectively inclined and parallely attached, and magnetic field mechanisms 4, 8 corresponding thereto are also inclined. And the rectangular magnetic flux is conducted to respective armatures 3, 7 by magnets 42, 82 and shared magnets 48 through magnetic poles 43, 44 and magnetic poles 83, 84, so as to increase thrust of the armatures 3, 7 whose effective conductor lengths are increased by being inclined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetically driven valve for opening and closing an intake / exhaust port of a cylinder of an internal combustion engine.

[0002]

2. Description of the Related Art An opening / closing valve provided at an intake / exhaust port of a cylinder is conventionally opened / closed via a member such as a timing belt based on the rotation of a crankshaft and mechanically linked, so that the degree of freedom of opening / closing is increased. Therefore, an electromagnetic valve driven by an electromagnetic force is provided to improve this.

To drive such an electromagnetic valve, there is a combination of a linear DC motor and an electromagnetic solenoid. In this drive system, the initial drive is performed by the electromagnetic solenoid and the control after the drive is performed by the linear DC motor. Is going.

The armatures of the movable portion of the linear DC motor, for the intake valve and the exhaust valve, are normally arranged in a straight line as shown in the top view of FIG.

[0005]

In order to obtain such drive of the intake / exhaust valve, it is necessary to secure a sufficient length of the horizontal winding of the amateur. If the width is narrow, the length of the horizontal winding cannot be sufficiently obtained, and the thrust of the valve may be insufficient.

The present invention has been made in view of such a problem, and the linear DC motor for driving the intake / exhaust electromagnetic valve is arranged at an angle so that the effective conductor length of each amateur is sufficiently large. It is to provide an electromagnetically driven valve that seeks to be secured.

[0007]

In order to achieve the above-mentioned object, according to the present invention, coils which are respectively attached to the stems of intake / exhaust valves arranged in parallel and are flatly wound in a rectangular frame shape are concentrated. And an electromagnetically driven valve that is driven up and down by energizing the coil, each magnetic field mechanism passing a magnetic flux orthogonal to the horizontal winding portion of the coil,
Provided is an electromagnetically driven valve in which a plane of the coil is inclined with respect to a straight line connecting the two stems and arranged parallel to each other.

[0008]

[Function] Since the armature attached to the stem of the intake / exhaust valve and the magnetic field mechanism for giving a DC magnetic flux to the armature are inclined with respect to the straight line connecting both the stems, the armature for generating the driving force has a sufficient horizontal length. Reserved.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a top view of a drive unit of an embodiment of an electromagnetically driven valve according to the present invention, and FIG. 2 is an explanatory view showing a side surface of this embodiment.

In these drawings, reference numeral 1 denotes an intake valve, the stem 11 of which is supported by a valve guide 12, and a lower valve portion 13 is seated on a valve seat 14 of an intake port to close the intake passage when the valve is closed.

Reference numeral 2 denotes a spring, which is arranged between an upper seat 22 attached by a cotter 21 at a predetermined position of the stem 11 and an upper portion of the cylinder, and the stem 11 is pulled upward by an elastic force to close the intake valve 1 at a closed position. Is biased to.

Reference numeral 3 denotes an armature attached to the valve retainer 15, in which windings of a good electric conductor are concentrated and flatly wound in a frame shape and have an inclination angle as compared with the conventional example shown in FIG. The intake valve 1 is driven up and down by an electromagnetic force of an electric current flowing through the upper winding 31 and the lower winding 32 of the horizontal portion of the frame-shaped winding and the magnetic flux between the magnetic poles of the magnetic field mechanisms 4 and 5, which will be described later. To do.

The magnetic field mechanism 4 includes a modified U-shaped outer yoke 41, a magnet 42, a shared magnet 48 and a pair of magnetic poles 43.
The magnet 42 and the common magnet 48 are attached to the upper winding 31 which is attached corresponding to the inclined armature 3 having 44 and which is interposed between the magnetic poles 43 and 44 so as to pass a strong magnetic flux in the direction shown. It is magnetized.

The magnetic field mechanism 5 passes a magnetic flux through the lower winding 32 of the armature 3. The magnetic field mechanism 5 is different from the above-mentioned magnetic field mechanism 4 only in the direction of magnetization of the magnets, and the other components are almost the same. It is mounted on the base 51.

Reference numeral 6 denotes an exhaust valve, which includes a stem 61 axially supported by a valve guide 62 and a valve seat 64 at the exhaust port.
Is provided with a valve portion 63 that closes the exhaust flow passage in close contact with the intake valve 1, and a spring 66 that is substantially the same as that of the intake valve 1.
In addition, the armature 7 is wound in a frame shape having an upper winding 71 and a lower winding 72. The armature 7 is attached to the valve retainer 65 above the stem 61 at an inclination angle parallel to the armature 3.

Reference numerals 8 and 9 are magnetic field mechanisms for driving the exhaust valve 6 up and down, and the magnetic field mechanism 8 is the upper winding 71 of the amateur 7.
Corresponding to the above, the magnetic field mechanism 9 passes through orthogonal magnetic fluxes corresponding to the lower windings 72 thereof.

The magnetic field mechanism 8 is, as shown in FIG.
It has an outer yoke 81, a magnet 82, magnetic poles 43 and 44, and a long shared magnet 48 shared with the magnetic field mechanism 4, and the magnet 82 and the magnet 48 are magnetized by applying a strong magnetic flux to the upper winding 71 in the direction shown in the figure. It is configured to communicate. In addition,
The magnetic field mechanism 9 passes a magnetic flux through the lower winding 72 of the amateur 7. The magnetic field mechanism 9 is different from the magnetic field mechanism 8 only in the magnetizing direction of the magnets, and is provided with almost the same members except the above. It is located on the chairman of table 51.

Next, the operation of the present embodiment thus constructed will be described. When a current in the direction of arrow a shown in FIG. 1 is passed through the armature 3 when the intake valve 1 is opened, the magnet 43,
The magnetic force of the magnetic flux of 44 crosses the armature 3 and the electromagnetic force of the current flowing through the upper winding 31 conquer Fleming's left-hand rule to generate thrust to move the stem 11 downward, while the lower winding A downward thrust is also generated between 32 and the magnetic pole corresponding to this, and the intake valve 1 is strongly opened by both upper and lower thrusts, and the energization is stopped.

In the meantime, in this embodiment, since the armature 3 and the magnetic field mechanisms 4 and 5 are arranged so as to be inclined, the length of the upper and lower windings of the armature 3 and the magnetic poles corresponding thereto are arranged in a straight line as compared with the conventional arrangement. The magnet becomes large, so that a large thrust is obtained and the intake valve 1 is opened.

When the intake valve 1 is closed, a current is applied to the armature 3 in a direction opposite to that when the intake valve 1 is opened, and an electromagnetic force between the armature 3 and the corresponding magnetic poles causes an upward thrust. The intake valve 1 is strongly closed.

With respect to the on-off valve of the exhaust valve 6, the armature 7 is energized with a current in a predetermined direction, and the electromagnetic force between the magnetic flux between the magnetic poles of the magnetic field mechanisms 8 and 9 causes the intake valve 1 to move. Like the opening and closing, the thrust acts to drive the exhaust valve 6.

[0022]

According to the present invention as in the above embodiments,
Since each amateur and magnetic field mechanism that gives thrust to the intake / exhaust valve are arranged side by side with a predetermined angle, the upper and lower windings that are the effective conductors of the amateur that is the thrust source,
It is possible to use a corresponding magnetic pole having a large size, and it is possible to obtain an efficient electromagnetic valve with a large thrust. Further, in the present invention, since the magnetic field mechanisms are arranged in a tilted manner, there is an advantage that the magnets on one side of each can be commonly used and the space can be effectively used.

[Brief description of drawings]

FIG. 1 is a top view of a drive unit of an embodiment of an electromagnetically driven valve according to the present invention.

FIG. 2 is an explanatory diagram showing a side surface of the present embodiment.

FIG. 3 is a top view of a conventional electromagnetic valve drive unit.

[Explanation of symbols]

 1 ... Intake valve 3, 7 ... Amateurs 4, 5, 8, 9 ... Magnetic field mechanism 6 ... Exhaust valve 11, 61 ... Stem 31, 71 ... Upper winding 32, 72 ... Lower winding 48 ... Shared magnet

Claims (2)

[Claims] 1. A coil, which is respectively attached to stems of intake / exhaust valves arranged in parallel and is concentrated in a square frame shape and concentrated in a flat manner, and respective magnetic fields which pass a magnetic flux orthogonal to a horizontal winding portion of the coil. And an electromagnetically driven valve that is driven up and down by energizing the coil, wherein the plane of the coil is inclined with respect to a straight line connecting the two stems, and is arranged parallel to each other. Drive valve. 2. The electromagnetically driven valve according to claim 1, wherein each of the magnetic field mechanisms includes a shared magnet.