JPH0515512B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an oil regeneration device for an internal combustion engine, which removes dust, carbon, etc. mixed into or generated in the engine oil of, for example, an internal combustion engine of an automobile.

(Prior Art) FIG. 2 is a sectional view showing a conventional oil regeneration device for an internal combustion engine. In the figure, the internal combustion engine 1 is
A discharge port 2 for discharging engine oil to the outside; and an inlet port 4 provided through a threaded portion 3 protruding to the outside of the internal combustion engine 1 and sucking the engine oil discharged to the outside into the internal combustion engine 1 It is equipped with The container 5 is detachably screwed onto the threaded portion 3 so as to cover the discharge port 2 and the suction port 4 . The cylindrical wire mesh 6 is installed so that the threaded part 3 is inserted into its hollow part, and its lower end is fixed to the bottom inner surface 501 of the container 5. The cylindrical filter 7 is installed so that the wire mesh 6 is inserted into its hollow part, and its lower end is fixed to the bottom inner surface 501 of the container 5. The separator 8 is fixed to the upper ends of the wire mesh 6 and the filter 7, and is attached to the container 5.
The interior is separated into a first chamber 502 and a second chamber 503, with a discharge port 801 discharging engine oil from the first chamber 502 to the second chamber 503, and a discharge port 801 discharging engine oil from the first chamber 502 to the second chamber 503. A suction port 802 for sucking air from the chamber 503 into the first chamber 502 is provided. The valve 9 covers the outlet 801 and is pressed against the separator 8 by a spring 10. The O-ring 11 keeps the outer wall surface of the internal combustion engine 1 and the bottom outer surface of the container 5 airtight.

The conventional internal combustion engine oil regeneration device is configured as described above, and the oil is drawn into the internal combustion engine 1 again through the discharge port 2.

Also, the filter 7 may become clogged and the first
When the pressure in the chamber 502 exceeds a predetermined value, the spring 1
Overcoming the pressing force of 0, lift the valve 9 upward and open the discharge port 2→first chamber 502→discharge port 801.
→ second chamber 503 → suction port 802 → suction port 4, bypassing the filter 7 and being sucked into the internal combustion engine 1.

On the other hand, as an example of removing impurities in oil using not only filters but also static electricity removal technology,
There is one described in Publication No. 2764.

In this publication, three metal cylinders with small holes formed inside the oil tank are arranged concentrically, and a negative voltage is applied to the cylinder located in the middle, and a positive voltage is applied to the cylinders and the oil tank arranged inside and outside of this cylinder. A septic tank is disclosed in which an adsorbent material is filled between the cylinders.

Impurities in the oil are adsorbed by the inner and outer cylinders and adsorbent substances depending on the properties of the substances.

Further, another example of oil purification by static electricity removal is described in Japanese Utility Model Application Publication No. 126250/1983.
This publication discloses an electrostatic oil filter in which an adsorbent is provided on the inner periphery of a container, an inner electrode is arranged in the center of the container, and a filter medium is arranged around the outer periphery of the inner electrode. Since a negative voltage is applied to the inner electrode and a positive voltage is applied to the container, impurities at a negative potential are attracted to the container side and adsorbed by the adsorbent, and impurities that are not adsorbed here are absorbed by the filter material. filtered by.

(Problems to be Solved by the Invention) However, since the oil regeneration device for an internal combustion engine shown in the second figure is configured as described above, and the filter 7 is of about 30μ, for example,
There was a problem in that it was not possible to remove impurities such as dust that were smaller than this.

In addition, in the internal combustion engine 1, carbon is generated in the engine oil because it is ignited by a plug, and this carbon is strongly electrostatically bonded to the oil molecules and cannot be removed by the filter 7, causing the engine oil to deteriorate. There was a problem.

On the other hand, in the septic tank disclosed in Japanese Patent Publication No. 39-2764, the adsorbent material is located between the cylinder with a negative potential and the cylinder with a positive potential, so half of the adsorbent material is positively charged and the other half is negatively charged. Impurities, which are mainly at a negative potential, could only be adsorbed by about half of the adsorbent material, resulting in poor static removal efficiency.

Furthermore, in the oil purification device disclosed in Japanese Utility Model Publication No. 56-126250, the adsorbent is placed inside the container, so the part of the adsorbent that is in contact with the container is positively charged, but the oil The part in contact with the adsorbent is negatively charged because of the oil, which has a negative potential.Therefore, there is a drawback that impurities, which have a negative potential, cannot be sufficiently adsorbed on the adsorbent surface.

Furthermore, since unadsorbed impurities adhere directly to the filter medium without any intermediate member, the filter medium is easily clogged.

(Means for Solving the Problems) In this invention, an oil regeneration device is defined in order to reliably clean internal combustion engine oil by efficiently combining static electricity removal and filter removal. A container to be used is set as an outer electrode at earth potential, an inner electrode at a positive potential is installed inside the container, a filter is installed inside the inner electrode at a positive potential, and an adsorbent is installed between the inner electrode and the filter. The present invention provides an oil regeneration device for an internal combustion engine.

(Function) In the present invention, impurities in the oil are electrostatically aggregated by applying a voltage to the engine oil using a container constituting an outer electrode set to a ground potential and an inner electrode inside the container. As the impurities pass through the mesh or pores of the inner container, their distance from each other is reduced, thereby promoting electrostatic agglomeration. The impurities are then adsorbed onto the adsorbent, but since the adsorbent is surrounded by an inner electrode and the inner surface of the adsorbent is close to the filter, the entire adsorbent is at a positive potential, ensuring that the impurities, which are at a negative potential, are to be captured. In addition, when impurities that cannot be captured by the adsorbent also pass through the adsorbent, electrostatic aggregation is promoted due to the short distance between the impurities, resulting in agglomerates of impurities with large particle sizes. The impurities that have passed through the adsorbent in this way are finally captured by the filter and deposited on the outer peripheral surface of the filter, thereby ensuring that the oil is purified.

(Embodiment) FIG. 1 is a side sectional view showing an embodiment of an oil regeneration device for an internal combustion engine according to the present invention.
.about.11 are completely the same as the above-mentioned conventional device.

In FIG. 1, the inner electrode 12 is made of a wire mesh or a porous body and has a cylindrical shape, and both ends thereof are fixed to the bottom inner surface 501 of the container 5 and the separator plate 8, and the filter 7 is housed in the hollow part thereof. A positive potential is applied to this inner electrode 12. Also, filter 7
It is said to be about 30μ.

The container 5 has an outer electrode to which a ground potential is applied, and the inner electrode 12 is inserted into a hollow portion thereof.

These inner electrodes 12 and container 5 constitute a voltage applying means.

An adsorbent 1 is placed between the inner electrode 12 and the filter 7.
7 is installed. This adsorbent 17 is made of activated clay, zeoherb, etc., for example.

In the internal combustion engine oil regeneration device configured as described above, by applying a voltage to the engine oil between the inner electrode 12 and the container 5, a voltage is generated around the impurity molecules due to the potential difference between the oil molecules and the impurity molecules. It cancels the zeta potential and electrostatically aggregates impurity molecules.

In addition, due to differences in the mass of impurity molecules, differences in viscosity depending on the type of engine oil, and differences in the flow rate of engine oil depending on the type of engine, differences in the applied voltage and application time to cause electrostatic coagulation may occur. To compensate, the engine oil is passed through the wire mesh or porous holes of the inner electrode 12, and the adsorbents 17 are forced to pass through each other, thereby narrowing the distance between impurity molecules and forcing the impurity molecules to Causes electrostatic aggregation.

In this way, dozens to hundreds of impurity molecules electrostatically aggregate and become larger, first passing through the adsorbent 17. At this time, since the inner electrode 12 is at a positive potential and the adsorbent 17 is close to this electrode 12, the entire adsorbent 17 is also charged to a positive potential. Therefore, impurities at negative potential are efficiently adsorbed by this adsorbent 17. Furthermore, since the distance between impurities is shortened when they pass through the adsorbent 17, impurities that have not yet been aggregated are electrostatically aggregated at this time and become large particles.

The impurities that have passed through the adsorbent 17 adhere to the filter 7, where they are deposited and filtered into a cake.

Therefore, even impurities of about 1μ can be effectively removed. Furthermore, since large particles of impurities are deposited on the outer periphery of the filter 7, the impurities themselves serve as a pre-filter, improving the life of the filter.

Since impurities are removed in three stages by the inner electrode 12, the adsorbent 17, and the filter 7, clogging of the filter 7 can be prevented.

Further, in the above embodiment, the voltage applying means is constituted by a pair of electrodes consisting of the inner electrode 12 and the container 5, and the zeta potential due to the potential difference between the oil molecules of the engine oil and the impurity molecules is canceled out, and the impurity molecules are electrostatically aggregated. After that, it was filtered with a filter 7, but the voltage applying means may be provided with a dielectric made of an insulator such as glass or a semiconductor, for example, between a pair of electrodes.

(Effect of the invention) Since this invention is configured as described above,
Impurities in engine oil can be efficiently electrostatically aggregated, and even minute impurities can easily adhere to adsorbents and filters.

Furthermore, since the entire adsorbent is at a positive potential, impurities are easily adsorbed by the adsorbent, and therefore, impurities are not deposited too much on the filter, and clogging of the filter can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a sectional side view showing an embodiment of an oil regeneration device for an internal combustion engine according to the present invention, and FIG. 2 is a sectional side view showing a conventional oil regeneration device for an internal combustion engine. In the figure, 1 is an internal combustion engine, 2 is a discharge port, 4 is an intake port, 5 is a container, 7 is a filter, 12 is an inner electrode, and 17 is an adsorbent.

Claims (1)

[Scope of Claims] 1. A discharge port for discharging engine oil from inside the internal combustion engine to the outside, and an intake port for sucking the engine oil discharged from the discharge port to the outside into the internal combustion engine, a container made of a conductor constituting an outer electrode at ground potential that is removably attached to the internal combustion engine; and a cylindrical container installed along the central axis within the container and whose hollow part communicates with the intake port. a positive potential inner electrode made of a wire mesh or a porous body, which is installed in the container to surround the cylindrical filter with a gap therebetween, and which allows the engine oil to pass through, and between the inner electrode and the filter. An oil regeneration device for an internal combustion engine, comprising: an adsorbent installed in the inner electrode and surrounded by the inner electrode.