JPH0882258A - Engine oil bath air cleaner - Google Patents

Abstract

(57) [Summary] [Purpose] Smooth the reversal of intake air in the oil chamber of an oil bath type air cleaner to reduce ventilation resistance. [Composition] An oil chamber 3 is provided below the air cleaner 1,
Perforated plate 10 for preventing ripples in the horizontal direction at the top of the oil chamber 3.
Is arranged so as to face the intake outlet 5 of the inflow pipe 2 from below, and the corrugation preventing porous plate 10 is curved toward the upper filter element 6 as it approaches the outer diameter portion 10a. Inflow pipe 2
The intake air flowing down through is smoothly guided from the central portion of the curved perforated plate 10 toward the outer diameter portion 10a and reaches the upper filter element 6. Therefore, the intake air smoothly reverses in the oil chamber 3 and enters the purification chamber 7 from the inflow pipe 2, so that the ventilation resistance in the oil chamber 3 becomes small.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil bath type air cleaner for an engine, in which intake air flowing down from an inflow pipe can be smoothly inverted from an oil chamber to a filter element to improve filling efficiency and fuel efficiency. .

[0002]

BACKGROUND OF THE INVENTION The basic structure of an oil bath type air cleaner for an engine to which the present invention is applied is, as shown in FIG. 1 or 3, in which a vertically oriented inflow pipe 2 is arranged in a central portion of an engine air cleaner 1. An oil chamber 3 is provided below the air cleaner 1, an air cleaner inlet 4 is opened above the inflow pipe 2, and an intake outlet 5 at the lower part of the inflow pipe 2 is communicated with the oil chamber 3 from above. A filter element 6 and an air purifying chamber 7 are provided in the air purifying chamber 6, the filter element 6 is exposed to the oil chamber 3, an air cleaner outlet 8 is opened in the air purifying chamber 7, and a perforated plate 10 for preventing the corrugation is provided laterally above the oil chamber 3. Is arranged so as to face the intake outlet 5 of the inflow pipe 2 from below, and the intake air sucked into the inflow pipe 2 from the air cleaner inlet 4 is reversed from the intake outlet 5 to the filter element 6 via the oil chamber 3, and It is of configuration to form so as to flow out from the air cleaner outlet 8 through the air chamber 7.

Since the intake air flowing down through the inflow pipe 2 is inverted upwards in the oil chamber 3, the oil surface of the oil chamber 3 swells due to the flow of the intake air, and the swelling oil flows to the filter element 6. Adhere to. However, if this amount of adhesion becomes excessive, there is a risk that oil will enter the intake passage of the engine. The corrugation preventing porous plate 10 suppresses the corrugation of the oil surface to prevent excessive adhesion of oil to the filter element 6.

[0004]

2. Description of the Related Art As a conventional technique of the above-mentioned type, Japanese Patent Laid-Open No.
As shown in Japanese Patent No. 353098 (see FIG. 3), a circular corrugation preventive porous plate 10 is generally made of punching metal, and the porous plate 10 is generally formed in a flat shape in the radial direction.

[0005]

In the above prior art, as described above, the intake air flowing down through the inflow pipe 2 is inverted in the oil chamber 3 and reaches the upper filter element 6, so to speak, the oil chamber 3 Since the flow of the intake air is bent, the intake air does not flow smoothly from the inflow pipe 2 to the air purification chamber 7. Therefore, the ventilation resistance in the oil chamber 3 becomes large, and there is a lot of room for improvement in filling efficiency, fuel efficiency, and the like. An object of the present invention is to smoothly reverse the intake air in an oil chamber of an oil bath type air cleaner and reduce the ventilation resistance.

[0006]

Means for achieving the above object will be described below with reference to FIGS. 1 and 2 showing an embodiment. That is, according to the present invention, in the oil bath type air cleaner of the engine of the basic structure, the outer diameter portion 10a of the corrugation preventing porous plate 10 is extended to near the outer peripheral portion of the filter element 6 in plan view to prevent the corrugation. Perforated plate 10
Is bent toward the upper filter element 6 as it approaches the outer diameter portion 10a, and the outer diameter portion 10a is bent upward to prevent the corrugated plate 10 from flowing into the oil chamber 3 from the intake outlet 5 of the inflow pipe 2. The intake air is smoothly guided to the filter element 6 in an inverted manner. In this configuration, it is considered that the vertical section shape of the corrugation preventing porous plate 10 is “curved”, for example, in an arc shape or a polygonal line shape.

[0007]

Since the corrugation preventing perforated plate 10 is curved backward as it approaches the outer diameter portion 10a, the intake air flowing down the inflow pipe 2 is prevented by the curling prevention perforated plate 10. It is smoothly guided from the central portion toward the outer diameter portion 10a, is inverted, and reaches the upper filter element 6. Therefore, the intake air smoothly reverses in the oil chamber 3 and enters the purifying chamber 7 from the inflow pipe 2, so that the ventilation resistance in the oil chamber 3 is reduced.

[0008]

EFFECTS OF THE INVENTION (1) Since the intake air is smoothly inverted in the oil chamber, the intake air is sufficiently supplied to the combustion chamber, and the fuel economy is improved. (2) Due to the above (1), the intake air is sufficiently supplied to the combustion chamber, so the generation of black smoke is suppressed and the color of the exhaust gas improves,
The amount of unburned components generated is reduced.

(3) Since the intake air is smoothly inverted in the oil chamber to increase the charging efficiency, the combustion timing is advanced and the exhaust temperature is lowered. (4) Due to the above (3), the charging efficiency is increased, so the output of the engine is improved.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cutaway view with an enlarged view of a main part of an oil bath type air cleaner of an engine, and FIG. 2 is a plan view of an oil chamber of the air cleaner.

As shown in FIG. 1, the air cleaner 1 of the engine is constructed by detachably connecting an air cleaner body 11 and a cup-shaped oil bath case 12 thereunder via a fastener 13 to the air cleaner body. A cylindrical inflow pipe 2 is arranged vertically in the central portion of 11 and an oil chamber 3 is formed in an oil bath case 12. A donut-shaped air purifying chamber 7 is provided in the outer peripheral space of the inflow pipe 2 of the air cleaner body 11.
The filter element 6 and the filter element 6 are laminated one above the other so that the filter element 6 faces the oil chamber 3. An air cleaner inlet 4 is opened in the upper part of the inflow pipe 2, an intake air outlet 5 in the lower part of the inflow pipe 2 is communicated with the oil chamber 3 from above, and an outlet pipe of the air cleaner from the purifying chamber 7 to the outside of the air cleaner body 11. 8 is derived.

As shown in FIG. 1, the intake air sucked from the air cleaner inlet 4 flows down the inflow pipe 2, is reversed from the intake outlet 5 to the filter element 6 via the oil chamber 3, and the air purification chamber 7 is also provided. Through the outlet pipe 8 of the air cleaner and is supplied to the combustion chamber of the engine.

As shown in FIGS. 1 and 2, three brackets 14 are erected upward from the bottom wall 3a of the oil chamber 3, and a disc-shaped corrugation is formed by a punching metal provided with a large number of fine through holes 16. The perforated plate 1 for preventing the corrugation is formed, and the perforated plate 10 for preventing corrugation is placed in a horizontal posture and detachably fixed to the bracket 14 with the respective fastening bolts 15.
0 is arranged on the upper side of the oil chamber 3 so as to face the intake outlet 5 of the inflow pipe 2 from below.

As shown in FIG. 2 and an enlarged view of the P portion of FIG.
The outer diameter portion 10a of the corrugation preventing porous plate 10 extends to near the outer peripheral portion of the filter element 6 in a plan view, and as the corrugation preventing porous plate 10 approaches the outer diameter portion 10a, the filter element 6 is directed upward. Is formed so as to be curved and curved in an arc shape in section.

The intake air flowing down through the inflow pipe 2 is reversed in the oil chamber 3 and flows into the upper filter element 6 again. In the corrugation-preventing porous plate 10, the outer diameter portion 10a is curved upward. Because of its shape, it is possible to smoothly guide the intake air in an inverted shape.

Therefore, the function of the oil bath type air cleaner of the engine of this embodiment will be described. Since the corrugation preventing perforated plate 10 can be bent upward toward the outer diameter in a curved shape, it flows down the inflow pipe 2. The intake air is smoothly guided from the central portion 10b toward the outer diameter portion 10a by the warped perforation preventing porous plate 10 and is inverted, and reaches the upper filter element 6.

For this reason, the intake air smoothly reverses in the oil chamber 3 and enters the purifying chamber 7 from the inflow pipe 2, so that the oil chamber 3
The ventilation resistance is reduced, the intake air is sufficiently supplied to the combustion chamber to improve the fuel efficiency, the generation of black smoke is suppressed, and the exhaust color is improved. Further, since the charging efficiency is increased, the output of the engine is improved, the combustion timing is advanced, and the exhaust temperature is lowered.

In the present invention, the perforated plate 10 for preventing waviness is provided.
Instead of continuously bending in a circular arc shape as in the above-described embodiment, it may be formed in a bent line shape so as to warp upward.

[Brief description of drawings]

FIG. 1 is a cutaway view with an enlarged view of a main part of an oil bath type air cleaner for an engine showing an embodiment of the present invention.

FIG. 2 is a plan view of an oil chamber of the air cleaner.

FIG. 3 is an explanatory view of an oil bath type air cleaner of an engine showing a conventional technique, FIG. 3A is a cutaway view of a main part of the air cleaner, and FIG. 3B is a plan view of an oil chamber of the air cleaner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Air cleaner, 2 ... Inflow pipe, 3 ... Oil chamber, 4 ... Air cleaner inlet, 5 ... Inflow pipe intake / outlet, 6 ... Filter element, 7 ... Purification chamber, 8 ... Air cleaner outlet, 10
... perforated plate for preventing corrugation, 10a ... Outer diameter part of perforated plate for preventing corrugation.

Claims (1)

[Claims] 1. A vertically oriented inflow pipe (2) is arranged in a central portion of an air cleaner (1) of an engine, an oil chamber (3) is provided in a lower portion of the air cleaner (1), and an upper portion of the inflow pipe (2) is provided. Open the air cleaner inlet (4) to the intake port at the bottom of the inflow pipe (2)
(5) is communicated with the oil chamber (3) from above, the filter element (6) and the purifying chamber (7) are provided in the outer peripheral space of the inflow pipe (2), and the filter element (6) is connected to the oil chamber (3). The air purification room
The air cleaner outlet (8) is opened in (7), and the perforated plate (10) for preventing corrugation is laterally provided at the upper side of the oil chamber (3).
The filter is arranged so as to face the intake outlet (5) of (2) from below, and the intake air sucked into the inflow pipe (2) from the air cleaner inlet (4) is filtered from the intake outlet (5) through the oil chamber (3). In an oil bath type air cleaner of an engine configured to be turned over to an element (6) and to flow out from an air cleaner outlet (8) through a purifying chamber (7), an outer diameter portion of the corrugation preventing perforated plate (10). (10a) is extended to near the outer peripheral portion of the filter element (6) in plan view, and the corrugated perforated plate (10) is attached to the outer diameter portion (10).
The inlet port of the inflow pipe (2) is curved by the corrugated perforated plate (10) in which the outer diameter portion (10a) is bent upward so as to be curved toward the upper filter element (6) as it gets closer to a).
An oil bath type air cleaner for an engine, characterized in that the intake air flowing into the oil chamber (3) from (5) is smoothly guided in an inverted shape toward the filter element (6).