JP2512697Y2 - Engine oil bath type air cleaner - Google Patents

Description

[Detailed Description of the Invention] << Industrial Application Field >> The present invention relates to an oil bath type air cleaner used in an intake passage of an engine.

<Prior Art> Conventionally, as an oil bath type air cleaner, for example, as disclosed in Japanese Utility Model Publication No. 61-277864, a cylinder having an air inlet at one upper side and a purifying outlet at the center of the upper end. Attach an oil tank to the bottom of the casing
The dust trapping oil is stored in the oil tank, and the cleaner element is placed in the casing with an appropriate gap between the oil surface and the oil surface in the oil tank. It is known that the introduced outside air is made to collide with the oil surface so that dust is primarily captured, and further that the cleaner element is wetted by the scattered oil to secondarily capture dust. .

<Problems to be solved> In this type of oil bath type air cleaner, the oil scattered by the inflowing air adheres to the cleaner element, and the dust that has not been trapped is adhered to the cleaner element. Scattering oil plays an important role in cleaning efficiency. Since the force that scatters the oil is affected by the collision force of the inflow air on the oil surface, that is, the flow velocity of the inflow air, there is a close relationship between the flow passage cross-sectional area of the outside air introduction pipe and the cleaner ability. For this reason, the conventional oil bath type air cleaner is not able to exhibit the predetermined capacity when used for engines with different displacements, so it is configured as a dedicated device for each engine displacement, and as a manufacturer, It is necessary to prepare several types of air cleaners of different sizes according to the engine displacement, which causes the cost of molds and the inventory management of product air cleaners to be troublesome, which causes a cost increase. It was

The present invention has been made focusing on such points.
Although the ability as an air cleaner can be maintained, it is an object to use a main member such as a cleaner case also for cost reduction and to increase the dust removal rate of intake air. To do.

<< Means for Solving the Problem >> In order to achieve the above-mentioned object, in the present invention, the end of the air introduction path for guiding the outside air into the gap formed between the oil sump and the cleaner element on the oil sump side is introduced. The inflow air flow velocity adjusting tool is fitted in and fixed, or the inflow air flow velocity adjusting processing portion is integrally formed inside the end portion of the air introduction path on the oil reservoir side, and Adjust the passage cross-sectional area of the air introduction passage by forming the inner peripheral surface or the inner peripheral surface of the flow velocity determining hole penetrating the flow velocity adjusting processing part in a straight line parallel to its axis. If possible, the same cleaner case can be applied to engines having different displacements.

<Operation> In the present invention, an inflow air flow rate adjuster is fitted in and fixed to the end of the air introduction path on the oil sump side, or the flow rate of the inflow air inside the end of the air introduction path on the oil sump side. Since the adjustment processing part is integrally formed, the same size body (cleaner case etc.) can be used for engines with different displacements, and the same dust removal performance can be obtained regardless of the displacement. To be In addition, since the inner peripheral surface of the flow velocity adjuster or the inner peripheral surface of the flow velocity determining hole is formed in a straight line parallel to its axis, the total amount of inflowing air flowing in the air introduction passage is Accelerated in the adjuster or in the flow velocity determination hole,
It reaches a predetermined high speed, and sprays to the oil sump while maintaining this high speed.

As a result, the dust mixed in the inflowing air is
The dust removal rate is high because the whole amount vigorously jumps into the oil sump at high speed.

<< Embodiment >> A drawing shows an embodiment of the present invention, and FIG.
FIG. 2 is an enlarged view of the main part.

The casing (1) of this air cleaner is integrally molded in the shape of a rectangular tube whose lower side is open.
An air inlet (2) opening upward and a purified air outlet (3) opening laterally are provided. An oil tank (4) made of plastic is fitted and mounted on the lower surface of the opening of the casing (1) and sealed by a ceiling (5), and a hook (not shown) connected to the oil tank (4) is formed at the lower end of the casing. The oil tank (4) is fixed to the lower end of the casing (1) by being closed by a stopper.

An air inflow pipe (8) is fitted and erected in the air inflow port (2), and an extension pipe (10) having a suction head (9) at the upper end is inserted into the pipe (8) so as to be adjustable. It is fitted.

A partition wall (11) is vertically provided inside the casing (1), and an air introduction path (12) is connected to the air inlet (2).
And an element accommodating chamber (13) connected to the air purification outlet (3) are defined, and a cleaner element (14) is accommodated and loaded in the element accommodating chamber (13). A gap (16) having a predetermined size is formed between the lower surface of the cleaner element (14) and the oil surface of the oil stored in the oil sump (15) formed in the oil tank (4). The lower end of the air introduction passage (12) is guided by this gap (16) and opens toward the oil surface.

The cross-sectional area of the air introduction passage (12) is set so that the flow velocity is such that the maximum effect can be obtained when the air introduction passage (12) is used in the maximum displacement engine, and the air introduction passage (1
A flow velocity control tool (17) for adjusting the cross-sectional area of 2) is internally fitted and fixed. The inner peripheral surface of the flow velocity adjuster 17 is formed in a straight line parallel to the axis center thereof. This flow velocity adjuster (17) is formed in a tubular shape with a passage cross-sectional area that maximizes the flow velocity when used in engines with different displacements. A flow velocity control tool (17) having an area is selected and fitted into the air introduction path (12).

The one shown in FIG. 3 shows another embodiment, which is
On the inner peripheral surface of the lower end of the air introduction path (12), a processing part (1
8) is formed integrally with the casing (1).

The flow velocity determining hole (21) is penetrated through the flow velocity adjusting processing portion (18) along the vertical direction.
The inner peripheral surface of is formed in a straight line parallel to its axis. The passage cross-sectional area of the flow velocity determining hole (21) should be dimensioned so that the maximum effect is obtained when used in an engine with the minimum displacement, and the passage may be blocked depending on the actual engine displacement. It is processed so as to increase the area and used.

FIG. 4 is a vertical cross-sectional front view of an oil bath type air cleaner of a different type. This is an air inflow pipe in which the casing (1) is formed in a cylindrical shape, and the casing (1) is projected from the center of the upper wall into the case. (8) is arranged so as to penetrate the cleaner element (14), and its lower end is arranged so as to face the oil surface in the gap (16) between the cleaner element (14) and the oil surface. A flow velocity control tool (17) is fitted and fixed to the inner peripheral surface of the lower end of (8), and the inside of the air inflow pipe (8) serves as an air introduction path (12). In this embodiment as well, the flow velocity adjusting processing portion (18) may be integrally formed on the inner peripheral surface of the lower end of the air introduction passage (12), and processing may be performed according to the amount of exhaust gas.

<Effect> In the present invention, a flow velocity adjusting tool for the inflow air is fitted in and fixed to the end of the air introduction passage on the oil sump side, or the flow velocity of the inflow air to the inside of the end of the air introduction passage on the oil sump side. Since the adjustment processing part is integrally formed, the flow velocity of the inflowing air can be made constant, and the main body (cleaner case etc.) of the same size can be used for engines with different displacements. Even if the same size body is used for engines with different displacements, the same dust removal performance can be obtained regardless of the displacement. As a result, the cost of the mold and the like can be reduced, and the inventory management of the product air cleaner becomes easy, so that the cost can be reduced. Further, since the inner peripheral surface of the flow velocity adjuster or the inner peripheral surface of the flow velocity determining hole is formed in a straight line parallel to the axis thereof, the total amount of inflowing air flowing in the air introduction passage is It is accelerated in the adjusting tool or in the flow velocity determining hole to reach a predetermined high speed, and the oil is sprayed onto the oil sump while maintaining this high speed.

As a result, the dust mixed in the inflowing air is
The dust removal rate is high because the whole amount jumps into the oil sump at a high speed.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a vertical sectional front view of an oil bath type air cleaner, FIG. 2 is an enlarged view of a main part thereof, and FIG. 3 is a view corresponding to FIG. FIG. 3 is a view corresponding to FIG. 1 of an oil bath type air cleaner of a different type. DESCRIPTION OF SYMBOLS 1 ... Cleaner case, 11 ... Air introduction path, 14 ... Cleaner element, 15 ... Oil sump, 16 ... Gap, 17 ... Flow velocity adjusting tool, 18 ... Flow velocity adjusting processing part, 21 ... Flow velocity determining hole.

Claims (2)

(57) [Scope of utility model registration request] 1. An oil sump (15) is formed at the bottom of the cleaner case (1), and a cleaner element (14) is arranged above the oil sump (15) at an appropriate interval to dispose the oil sump (15). Between the cleaner element and the cleaner element (14) (1
In the oil bath type air cleaner of the engine configured such that the air introduction passage (11) is projected from above into 6) and the upper part of the cleaner element (14) is communicated with the intake pipe of the engine, the air introduction passage (11) An inflow air flow rate adjuster (17) is fitted and fixed to the end on the oil sump (15) side, and the inner peripheral surface of this flow rate adjuster (17) is formed in a straight line parallel to the axis of the inflow air adjuster. An oil bath type air cleaner for the engine, which is characterized by its construction. 2. An oil sump (15) is formed at the bottom of the cleaner case (1), and a cleaner element (14) is arranged above the oil sump (15) at an appropriate interval to dispose the oil sump (15). Between the cleaner element and the cleaner element (14) (1
In the oil bath type air cleaner of the engine configured such that the air introduction passage (11) is projected from above into 6) and the upper part of the cleaner element (14) is communicated with the intake pipe of the engine, the air introduction passage (11) A processing part (18) for adjusting the flow velocity of the inflow air is integrally formed inside the end on the oil sump (15) side,
The flow velocity adjusting hole (21) is vertically penetrated through the flow velocity adjusting processing portion (18), and the inner peripheral surface of the flow velocity determining hole (21) is formed into a straight line parallel to the axial center of the hole. An oil bath type air cleaner for an engine, which is formed and constructed.