JP2002089378A - Intake pipe-inside grade magnetic field generating device for engine and air supply system for engine using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake pipe-inside grade magnetic field generating device for an engine capable of efficiently generating the grade magnetic field in a wide range without generating a leak of the magnetic field in the periphery. SOLUTION: This intake pipe-inside grade magnetic field generating device for engine is formed by arranging plural permanent magnets 4 in the inner surface 3 of an iron member 1 having a through hole inside thereof, bringing one magnetic pole of each permanent magnet 4 in contact with the iron member 1, directing the other magnetic pole to the center axis 2 of the hole of the iron member 1. Magnetic field is efficiently generated in the internal space of the intake pipe for engine by arranging the magnetic poles so that the magnetic pole brought in contact with the iron member becomes N-pole and S-pole each other, and a leak of the magnetic field outside of the iron member is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can be used for an air supercharger for an engine, and generates a gradient magnetic field in an intake pipe for an engine which efficiently generates a magnetic field in its internal space and does not receive a magnetic field outside. And a system using the same.

[0002]

2. Description of the Related Art In general, an air supercharger for an engine has a structure in which the intake side is pressurized by a turbocharger utilizing exhaust gas to efficiently take air into the engine. . In recent years, a technology has been developed that applies air to the engine efficiently by applying a magnetic field to the inside of the intake pipe of the engine by utilizing the property that air containing paramagnetic oxygen gas is attracted to the magnet (Patent No. 2).
No. 580511). In this technique, it is necessary to apply a gradient magnetic field whose magnetic field strength increases along the direction of air flow.
A specific example using a U-shaped magnet whose south pole faces each other is disclosed. However, when a U-shaped magnet is used, there is a danger that the magnetic field leaks to the surroundings and adversely affects peripheral devices.
In addition, there is a problem that a sufficient magnetic field cannot be applied to the air inside the intake pipe efficiently because the magnetic field lines extend to the outside.

In order to efficiently take in air into the engine by using a magnet as described above, the diameter of the intake pipe generally increases as the capacity of the engine increases, and the inside of the cylindrical intake pipe generally increases. There is a problem that it is difficult to efficiently generate a gradient magnetic field in a wide space.
Further, it is necessary to prevent a magnetic field from leaking into the engine room and adversely affecting peripheral devices and devices such as a control computer. Furthermore, strong permanent magnets using rare earth elements are expensive, and there has been a demand for the development of a method and apparatus capable of efficiently generating a magnetic field in a wide space with a small number of magnets in order to reduce costs.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies on means for efficiently generating a gradient magnetic field in a wide space in an intake pipe for an engine. As a result, the periphery of the intake pipe is covered with iron parts, and A plurality of permanent magnets are provided in a predetermined arrangement on the inner surface of the part, and it has been found that the above problem can be solved by applying a magnetic field to air in the intake pipe, and based on this finding, the present invention has been accomplished. . That is, the present invention provides (1) a method in which a plurality of permanent magnets are arranged on an inner surface of an iron member having a through hole therein, and one magnetic pole of each permanent magnet is brought into contact with the iron member, and the other magnetic pole is provided. Is directed toward the central axis of the hole of the iron member, and the magnetic poles in contact with the iron member are alternately arranged as N poles and S poles, so that a magnetic field can be efficiently generated in the internal space of the engine intake pipe. A gradient magnetic field generator in an intake pipe for an engine, which is generated and does not have a magnetic field outside of an iron member. (2) Near the periphery of the intake pipe for an engine, one magnetic pole facing a central axis thereof is alternately arranged. A plurality of permanent magnets are arranged so as to be an N pole and an S pole, and the outside of the permanent magnet is further
The gradient magnetic field generator in an intake pipe for an engine according to (1), wherein the device is surrounded by an iron member that is in contact with the other magnetic pole of the permanent magnet, and (3) (1) or (2). An engine air supply system characterized in that the engine intake pipe gradient magnetic field generating device is provided in an engine air supercharger. The iron member used in the present invention refers to a member having a high magnetic permeability, and stainless steel or the like can be used, but pure iron can be preferably used from the viewpoint of manufacturing cost.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A gradient magnetic field generator in an intake pipe for an engine according to the present invention comprises:
It is characterized in that the above-mentioned gradient magnetic field is efficiently generated by being surrounded by an iron member in contact with one magnetic pole of the permanent magnet, and no magnetic field is leaked to the periphery. The plurality of permanent magnets arranged around the engine intake pipe are arranged such that one magnetic pole faces the center axis of the engine intake pipe and the other magnetic pole contacts the iron member, and is spaced apart from the iron member. The magnetic poles are alternately N-poles and S-poles. Since the lines of magnetic force have the property of going from the north pole to the south pole, when the magnetic poles of the permanent magnet are arranged in this manner, it is possible to efficiently generate a magnetic field in a wide space inside the iron member. Further, the magnetic field lines have a property of passing through a substance having high magnetic permeability such as iron. By surrounding the outside of the permanent magnet with iron, the magnetic field leaking to the outside of the apparatus can be significantly reduced. The air supply system for an engine according to the present invention is characterized in that the above-described gradient magnetic field generator in the intake pipe for the engine is provided in the air supercharger for the engine, and there is no particular limitation. The device of the present invention can be applied to any part of the engine intake pipe as long as it can exert the function of sending air into the cylinder of the engine. Hereinafter, the device of the present invention will be described in more detail with reference to the drawings.

FIG. 1 is an explanatory view showing an embodiment of the apparatus of the present invention in a perspective view, showing an example in which an iron support is cylindrical and the shape of a permanent magnet is a rectangular parallelepiped. In the figure, reference numeral 1 denotes a cylindrical support made of iron, and an engine intake pipe penetrates a central portion thereof. The center axis of the support 1 is indicated by 2, and the inner (hole side) surface is indicated by 3. The length of the support 1 is a cm. The thickness of the support 1 depends on the type of iron used and the like, but is at least 1 mm or more, and more preferably about 3 to 5 mm. Reference numeral 4 denotes a permanent magnet attached to the inner surface 3 of the support 1. FIG. 2 is an enlarged sectional view showing a state where the apparatus shown in FIG. 1 is installed around an intake pipe of an engine. Four rectangular parallelepiped permanent magnets 4 are provided on the inner surface 3 of the iron support 1, and the direction of the long sides thereof is the central axis 2 of the cylinder.
Are arranged apart from each other so as to be parallel to. One of the poles of each permanent magnet contacts the inner surface 3 of the support 1, the opposite pole faces in the direction of the central axis 2, and the poles contacting the inner surface 3 of the support 1 alternately have N poles. The poles and the S poles are arranged. FIG. 2 illustrates the case where four rectangular parallelepiped permanent magnets are arranged, but the number of magnets can be appropriately set according to the size and shape of the iron support and the permanent magnets. For example, six magnets are arranged. May be. It is preferably an even number of four or more. It is desirable that the length of the long side of the permanent magnet 4 parallel to the central axis 2 be shorter than the length of the support 1 (a cm in FIG. 1) in order to prevent a magnetic field from leaking around. Although the cylindrical iron support is shown in FIG. 1, if the diameter of both ends of the support is reduced, leakage of the magnetic field can be further reduced. The intake pipe 5 of the engine is arranged at the center of the hole of the support 1 so that its central axis coincides with the central axis 2 of the support 1. The material of the intake pipe 5 is preferably a material that allows a magnetic field to pass, such as aluminum die-cast or plastic. In a space between the intake pipe 5 and the permanent magnets 4 and the support 1, a cushioning material 6 and the like are arranged in consideration of engine vibration and the like. Further, since the device of the present invention is heavy, it is preferable to appropriately fix it to a vehicle body or the like.

FIG. 3 (a) shows the lines of magnetic force in the apparatus of FIG. 2 by broken lines. As described above, since the magnetic field lines have the property of passing through a substance having high magnetic permeability, the magnetic field lines pass through the inside of the iron of the support 1 in the apparatus of FIG. In addition, since the magnetic lines of force have the property of going from the N pole to the S pole, the permanent magnets 4 are arranged by bringing the N pole and the S pole into contact with the iron support 1 alternately, so that a large space inside the support 1 is efficiently provided. A magnetic field can be generated. As a result, a magnetic field can be efficiently applied to air passing through the intake pipe arranged at the center of the device of the present invention over a wide range. The apparatus of the present invention is characterized by disposing a permanent magnet in an iron support. For comparison, the magnetic field distribution when the support is made of non-magnetic plastic instead of iron is shown by a broken line in FIG. Indicated by FIG.
In (b), the magnetic field generated by the permanent magnet 14 is
1 and has a risk of adversely affecting peripheral devices. In addition, when the magnetic field escapes to the outside, the efficiency of the magnetic field acting in the internal intake pipe decreases.

FIGS. 1 and 2 show one embodiment of the present invention using a cylindrical support which can be used when the intake pipe has a circular cross section. However, the present invention is not limited to this. It is not something to be done. If the cross section of the intake pipe is not circular, for example, just before the manifold, an iron support having a hole that matches the shape of the intake pipe may be used. As an example of such an embodiment, FIG. 4 is an explanatory view showing a cross-sectional view of one embodiment of the apparatus of the present invention using a steel support through which a rectangular hole penetrates. In the figure, 21 is an iron support, 2
Reference numeral 2 denotes a center axis of the support,
The permanent magnets 24 are fixed. The permanent magnet 24
Similar to the apparatus shown in FIGS. 1 and 2, the magnetic poles contacting the inner surface 23 of the support 21 are arranged so that they alternately become N poles and S poles. The device shown in FIG. 4 can be used when the intake pipe has a circular or rectangular cross section.

In the present invention, a gradient magnetic field whose magnetic field intensity increases in the traveling direction is generated in the air in the engine intake pipe to accelerate the flow of the air. In the present invention, the effect of the gradient magnetic field applied to the air in the intake pipe increases in proportion to the product of the magnetic field strength and the magnetic field gradient. As a strong permanent magnet that can be used in the present invention, specifically, for example, a neodymium-iron-boron magnet, a samarium-cobalt magnet, or the like can be used. Considering that the temperature inside the engine room rises, a high-temperature-resistant permanent magnet is preferable. In the embodiments shown in FIGS. 1 to 4, the shape of the permanent magnet is a rectangular parallelepiped, but the shape is not necessarily limited.

[0010]

Next, the distribution of the magnetic field intensity of the embodiment of the present invention shown in FIGS. 1 to 4 was measured. Example 1 As shown in FIGS. 1 and 2, a rectangular parallelepiped permanent magnet 4 (1 × 2
× 3 cm) were arranged inside a cylindrical iron support 1 having an inner diameter of 76 mm. The dimension of the side connecting the north pole and the south pole of the magnet is 1 cm, the magnetic pole is 2 × 3 cm, and the long side of 3 cm is parallel to the central axis 2 of the cylinder. In the intake pipe 5 located at the center, the measured value of the magnetic field strength on the circumference of 3 cm in diameter is on a line connecting the centers of the opposing permanent magnets, for example, 0,
On the 3, 6, and 9 o'clock lines, 130 mT (1.3 kilogauss) and 90 mT (0.9 kilogauss) at the halfway point of 1:30, 4:30, 7:30, and 10:30. . FIG.
FIG. 3 shows a schematic graph of the magnetic field strength on the circumference of 3 cm in diameter. The y-axis is parallel to the direction of air flow and the central axis 2. In FIG. 5, at y = 0 cm, ● indicates a line connecting the centers of the opposing permanent magnets, and o indicates a magnetic field intensity deviated by 45 °. Also, 1.5c higher than these points
Before m, the former was 80 mT (0.8 kilogauss) and the latter was 30 mT (0.3 kilogauss) (in FIG. 5, ● and ○ at y = 1.5 cm correspond to these values). As described above, in this embodiment, the magnetic field is axially symmetric with respect to the central axis and is efficiently distributed over a wide range. When the magnetic field strength was measured on a circumference of 1 cm outside the iron support 1 having a thickness of 0.3 cm, a maximum of 1 mT
(0.01 kilogauss), and it was found that the magnetic field that leaked to the outside of the iron support was significantly smaller than 180 mT (1.8 kilogauss) in the case of the support made of a nonmagnetic substance.

Embodiment 2 As shown in FIG. 4, a rectangular hole (7.2 × 7.2 cm)
Are used, and four rectangular parallelepiped permanent magnets 24 (2 × 1 × 3 cm) are fixed to four inner surfaces of the iron support 21. The long side of 3 cm is parallel to the central axis 22, that is, coincides with the direction of the air flow in the intake pipe when the engine intake pipe is pierced inside, and the surface of the magnetic pole is 2 × 3 cm. This device can be applied to an intake pipe having an outer diameter of 5 cm and a circular cross section. Also, the present invention can be applied to an intake pipe having a rectangular cross section with one side of 5 cm. Compared to the case of using a U-shaped magnet in this embodiment, less magnet material is used. Also, in the case of using a U-shaped magnet, the distribution of the magnetic field is greatly different between the direction connecting the magnets and the direction perpendicular thereto, whereas in this embodiment the distribution of the magnetic field is axially symmetric with respect to the center axis of the support. It has excellent characteristics and can efficiently generate a gradient magnetic field in a wide space in the intake pipe. In addition, there is an effect that a magnetic field does not exist in the vicinity, whereby a magnetic field can be efficiently generated inside the intake pipe, and the amount of permanent magnet used can be reduced, so that cost can be reduced compared with the conventional method. .

[0012]

As described above, the gradient magnetic field generating apparatus in the intake pipe for an engine of the present invention has a simple structure, generates magnetic field lines only in a wide space inside the intake pipe of the engine, and has a high strength. It is possible to efficiently generate a gradient magnetic field. Further, since the magnetic field generated from the permanent magnet can be confined inside the iron member, and the magnetic lines of force do not go outside, there is an excellent effect that the electronic components around the engine room are not adversely affected. In addition, the amount of permanent magnet used is smaller than that of conventional U-shaped magnets, as well as those that do not use iron members, so that costs can be reduced and the generation of a magnetic field inside the intake pipe is significantly increased. be able to. Further, according to the engine air supply system of the present invention, air can be efficiently taken into the engine.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention in a perspective view.

FIG. 2 is an explanatory diagram showing a cross-sectional view of an embodiment in which an engine intake pipe is penetrated into the device shown in FIG.

3A is a diagram illustrating the distribution of the lines of magnetic force in the embodiment shown in FIG. 1, and FIG. 3B is an explanatory diagram illustrating the distribution of the lines of magnetic force when the support is made of a non-magnetic material.

FIG. 4 is an explanatory view showing another embodiment of the present invention in a sectional view.

FIG. 5 is a graph schematically showing a magnetic field strength on a circumference having a diameter of 3 cm about a central axis in the apparatus shown in FIGS. 1 and 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 21 Iron support 2, 22 Central shaft 3, 23 Support inner surface 4, 14, 24 Permanent magnet 5 Engine intake pipe 6 Shock absorber 11 Non-magnetic support

Claims (3)

[Claims] A plurality of permanent magnets are arranged on an inner surface of an iron member having a through hole therein, and one magnetic pole of each permanent magnet is brought into contact with the iron member, and the other magnetic pole is connected to the iron member. A magnetic field is efficiently generated in the internal space of the engine intake pipe by arranging the magnetic pole in contact with the central axis of the hole of the member, and the magnetic pole in contact with the iron member so as to be an N pole and an S pole alternately. A gradient magnetic field generator in an intake pipe for an engine, wherein a magnetic field is not provided outside the iron member. 2. A plurality of permanent magnets are arranged near the periphery of an intake pipe for an engine such that one magnetic pole facing a central axis thereof becomes an N-pole and an S-pole alternately. 2. The apparatus for generating a gradient magnetic field in an intake pipe for an engine according to claim 1, wherein the apparatus is surrounded by an iron member in contact with the other magnetic pole of the permanent magnet. 3. An air supply system for an engine, wherein the device for generating a gradient magnetic field in an intake pipe for an engine according to claim 1 is provided in an air supercharger for an engine.