JPH0794811B2 - Dual-purpose air cleaner housing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner for cleaning intake air of an engine, and more particularly to a dual-purpose air cleaner to which either a dry type element or a wet type (oil bath type) element can be mounted. Is.

[0002]

2. Description of the Related Art An engine usually uses an air cleaner for cleaning its intake air. There are two types of air cleaners, a dry type and a wet type. The dry type element cleans the intake air by allowing the intake air to pass through a filter paper in the element and removing dust and the like contained in the intake air by the filter paper.

On the other hand, the wet type (also referred to as oil bath type) element means that the suction air collides with the oil in the oil pan to adsorb large dust into the oil, and the suction air causes the oil surface to rise up. The droplets are made into droplets, and the droplet oil is adsorbed by the element filled with the filter medium, and the adsorbed oil adsorbs small dust to the filter medium to clean the intake air.

Generally speaking, the dry type air cleaner has a good cleaning rate and can remove even fine dust, but has a smaller dust removing capacity than the wet type.
Therefore, when the engine is used in a large amount of dust, a wet type air cleaner is used, and when the amount of dust is relatively small, a dry type air cleaner is often used.

For this reason, for example, when an engine is mounted on a vehicle, an engine-installed air cleaner is also selected according to the usage environment of the vehicle. In this case, the dry type air cleaner is usually mounted on the upper part of the engine because it is sufficient to guide the intake air through the element made of filter paper or the like and allow it to pass therethrough. On the other hand, the wet type air cleaner
It is often mounted on the side of the engine, since it is necessary to first collide the intake air with the oil and then guide it through the element and let it pass through it, which requires an oil pan underneath. As described above, the air cleaners usually have different shapes and mounting positions with respect to the engine.

[0006]

However, as described above, since the air cleaner to be used is selected according to the usage environment of the vehicle in which the engine is mounted, the air cleaner to be used often differs even in the same vehicle. In this case, since the shapes and mounting positions of both air cleaners are different, it is necessary to design the shape structure of the part where the air cleaner is mounted in the vehicle so that both air cleaners can be mounted. There is a problem that it is easily tied to.

Further, the element of the wet type air cleaner may be a coarse fibrous element that adheres the splash oil, and even a small element can allow sufficient air passage, but the dry type element is Since it is possible to directly capture the dust contained in, it is necessary to use an element having a considerably large filtration area in order to allow sufficient passage of air. Therefore, conventionally, as a dry type element, an element in which a filter medium is bent into a bellows shape and is formed into a hollow cylindrical shape has been used.

Since it is necessary to use such an element, in order to obtain an air cleaner that can be used as both a dry type and a wet type, it is necessary to form a relatively large space into which a dry type hollow cylindrical element can be mounted. With, and with this attached,
It is necessary to allow the air to be filtered to pass through the filter medium and flow from the outside into the hollow space of the element (or from the hollow space to the outside), and there are many restrictions on the shape and configuration of the housing for mounting the element. There's a problem.

Incidentally, Japanese Utility Model Publication No. 37-23201 discloses an engine air cleaner to which both dry type and wet type (oil bath type) elements can be mounted. However, in the case of this air cleaner, the case main body to which the element is attached is attached to the engine, and the oil is put into this case. For this reason, when using a wet type element, when replacing the oil in the case, there is a problem that this cannot be done unless the case is removed from the engine.

In view of such circumstances, the present invention can use either a dry type element or a wet type element in one type of housing, and when a wet type element is used, an oil for dust adsorption is used. An object of the present invention is to provide a dual-purpose air cleaner having a structure that can be easily replaced.

[0011]

As means for solving this problem, the dual-purpose air cleaner housing of the present invention is characterized in that it is constructed as follows, for example, as shown in FIGS. It is a thing.

That is, the upper portion is provided with an air intake port 11a, the vertically extending first air passage 11 and the first air passage 11 are arranged back to back adjacent to each other, and the upper portion is connected to an intake port of the engine. An upper housing 10 having a connecting port 15a and a vertically extending second air passage 15;

The lower part of the first air passage 11 and the lower part of the second air passage 15 are detachably and airtightly joined to the upper housing 10 so as to cover the lower part of the upper housing 10 and the lower part of the first air passage 11 and the lower part of the second air passage 15 are provided through the internal space. Lower housing 2 for communication
Consists of 0 and

Utilizing the internal space of the second air passage 15 and the lower housing 20, an element mounting space is formed in which either the dry type element 40 or the oil bath type element 30 can be mounted.

When the dry type element 40 is used, the element 40 is formed in a hollow cylindrical shape and the second air passage 15 extends from the lower housing 2 to the lower housing 2.
It is arranged so as to extend vertically in the space reaching the inner space of 0,

When the oil bath type element 30 is used, the element 30 is arranged in the second air passage 15 and the oil for adsorbing dust is contained in the internal space of the lower housing 20. It is like this.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a wet type (oil bath type) air cleaner, and FIGS. 2 and 3 show an arrow II- in FIG.
FIG. 3 is a cross-sectional view taken along lines II and III-III. First, a wet type air cleaner will be described with reference to these drawings.

This air cleaner includes an upper housing 10,
It is composed of a lower housing 20 and an element 30. The upper housing 10 has a lattice-shaped air intake port 11a that is open to the outside at the upper portion, extends vertically, and has a lower end 11a.
The first air passage 11b is open downward, and the first air passage 11 is provided back to back adjacent to the first air passage 11 and has a connecting port 15a which is connected to an intake inlet of an intake manifold of the engine and extends vertically. In addition, the lower end 15b integrally has a second air passage 15 that opens downward.

The lower housing 20 is airtightly joined to the lower surface of the upper housing 10 with a seal ring 21 interposed therebetween, and the first air passage 1 and the second air passage 15 communicate with each other through the internal space of the lower housing 20. The lower housing 20 is used as an oil pan, and oil for adsorbing dust is put in the oil pan.

As shown in FIG. 3, this connection is made by engaging a hook 25 hinged to the lower housing 20 with a protrusion formed at the lower end of the upper housing 10, so that the lower housing 20 is independent. It is removable. As a result, the oil in the lower housing 20 can be easily replaced.

Further, a plurality of apertures are punched out slightly above the oil surface of the oil in the oil pan, and a baffle plate 22 for suppressing fluctuations in the oil surface is disposed. A partition plate 23 is arranged so as to extend.

On the other hand, in the second air passage 15 of the upper housing 10, an air cleaner element 30 is attached so as to close the entire cross section of the passage 15. This element 30 is composed of an upper retainer plate 33 punched into a shape as shown in FIG. 2 and a lower retainer plate in which a wire mesh of about 16 mesh is sandwiched by two punched plates like the upper retainer plate 33. 31, a fibrous filter medium 32 held between the upper and lower retainer plates 33, 31, and a U-shaped tube penetrating the upper and lower retainer plates 33, 31 and the filter medium 32 to integrally retain them. And a holder 34.

The mounting portion of the element 30 in the second air passage 15 is a simple vertically long space, and the element 30 is formed such that the outer edge thereof is along the inner wall of the second air passage 15. Therefore, the element 30 can be easily manufactured.

The cleaning of intake air by the air cleaner having the above structure will be described. Connection port 1 of the second air passage 15
Since 5a communicates with the intake manifold of the engine,
When the engine is operating, negative intake pressure acts on the second air passage 15. Therefore, the air intake port 1 of the first air passage 11
External air is sucked into the first air passage 11 from 1a.
(Arrow A1). This intake air passes through the opening of the baffle plate 22 from the first air passage 11 and then passes through the lower housing 20.
It collides with the oil surface inside (arrows A2 and A3).

As a result, the intake air suddenly turns in the direction from the lower side to the upper side and flows toward the element 30 (arrow A).
Regarding 2), due to the inertial force at this time, large dust in the intake air is separated and adsorbed in the oil. At the same time, the intake air that has collided with the oil surface causes the oil surface to become ruffled and splashes the oil, which then flows toward the element together with the intake air.

At this time, the cross-sectional shape of the lower portion 11c of the first air passage 11 is an arc shape as shown in FIG. 2, and by doing so, it collides with the oil surface and moves upward. The flowing air is widely dispersed so that the entire lower surface of the element 30 is evenly contacted. To this end, the curvature of the arc is determined by the oil pan (lower housing 20).
It is preferable that the width is about 1/2 to 2/3.

Intake air and oil droplets that have flowed so as to hit almost the entire lower surface of the element 30 in this manner pass through the lower retainer plate 31 and enter the filter medium 32. At this time, the splashed oil adheres to the filter medium 32, and the relatively fine dust contained in the intake air without being separated by the collision with the oil surface is adsorbed and removed by the oil adhered to the filter medium 32. As described above, the intake air is cleaned, and the cleaned air is sent into the intake manifold of the engine through the connection port 15a (arrow A5).

Next, a dry type air cleaner will be described with reference to FIGS. In this dry type air cleaner, the upper housing 10 and the lower housing 20 are common to the above-mentioned wet type air cleaner, and only the elements are different. However, the lower housing 20 is not filled with oil, and neither the baffle plate 22 nor the partition plate 23 is arranged.

Element 4 arranged in this air cleaner
As shown in FIG. 5, 0 has an elliptical cross section, and is arranged so as to extend vertically from the lower portion of the second air passage 15 into the lower housing 20. This element 40 includes upper and lower end plates 4
A filter paper 41 formed by bending and having a plurality of pleats between 3 and 45 is arranged so as to surround an elliptical center tube 42, and the upper end plate 43 has an outer peripheral edge formed with a second air passage 15. A seal member 44 that seals with the inner wall surface is attached.

The center tube 42 has a filter paper 41 on it.
A plurality of openings 42a for introducing the air that has passed through into the tube are formed. In this way, the element 40 is provided with the second air passage 15
Since it is arranged so as to extend to the full length of the vertically long space in the vertical direction, its filtering area can be made sufficiently large. As a result, even if the flow path resistance to the air increases due to the use of fine filter paper as the element 40, it is possible to prevent the filtration efficiency from decreasing.

The cleaning of the intake air in the case of the air cleaner having the above structure will be described. Inhaled into the first air passage 11 from the air inlet 11a
(Arrow B1) External air passes through the inside of this first air passage 11.
(Arrow B2) Second air passage 15 through the lower housing 20
Be guided to. The intake air guided to the second air passage 15 passes through the filter paper 41 of the dry type element 40 (arrow B4), dust is removed and cleaned by the filter paper 41, and the opening 42a of the center tube 42 is discharged. Through the center tube 4
Step inside 2.

Then, the air is sent from inside the center tube 42 through the second air passage 15 (arrow B5) to the connecting port 15a (arrow B6), and from the connecting port 15a to the intake manifold of the engine.

[0033]

As described above, according to the present invention,
It has the following effects. Above and below housing 10 ・ 2
By using the air cleaner housing consisting of 0, it can be used as a dry type air cleaner or a wet type air cleaner only by replacing the elements 30 and 40.

Therefore, as the air cleaner to be mounted on the engine, if the above-mentioned air cleaner housing can be mounted, the air cleaner can be installed in this housing according to the usage conditions of the engine (or the vehicle on which the engine is mounted). Both the dry type and the wet type can be supported by simply changing the mounted element.

Thus, it suffices to consider only one type of attachment position, space, etc. of the air cleaner for this engine, and the design thereof becomes easy.

Although the upper housing is connected to the engine, the lower housing can be independently attached to and detached from the upper housing, and the element can be easily replaced by simply removing the lower housing. In this case, the oil in the lower housing can be easily changed.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a wet type air cleaner using an air cleaner housing according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG.

FIG. 4 is a vertical sectional side view showing a dry type air cleaner using an air cleaner housing according to an embodiment of the present invention.

5 is a sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

[Explanation of symbols]

10 ... Upper housing, 11 ... First air passage,
11a ... Air inlet, 15 ... Second air passage, 15
a ... Connection port, 20 ... Lower housing, 30 ... Oil bath type element, 40 ... Dry type element.

Claims (1)

[Claims] 1. A vertically extending first air passage (11) having an air intake port (11a) in the upper part, and this first air passage (11).
An upper housing (10) having a second air passage (15) arranged vertically adjacent to each other (11) and having a connecting port (15a) connected to an intake port of an engine at an upper part thereof and extending vertically. ), And is detachably and airtightly joined to the upper housing (10) so as to cover the lower portion of the upper housing (10) and the lower portion of the first air passage (11) and the second air passage (11) through the inner space thereof. A dry type element (40) or an oil, which comprises a lower housing (20) communicating with the lower part of the passage (15) and utilizes the internal space of the second air passage (15) and the lower housing (20). An element mounting space is formed in which any of the bus type elements (30) can be mounted, and a dry type element
When the element (40) is used, the element (40) is formed in a hollow cylindrical shape and extends vertically in the space from the second air passage (15) to the internal space of the lower housing (20). When the oil bath type element (30) is used, the element (30) is arranged in the second air passage (15),
A dual-purpose air cleaner housing, characterized in that oil for adsorbing dust is accommodated in the inner space of the lower housing (20).