JPH06272630A - Air cleaner filter - Google Patents

Abstract

PURPOSE:To reduce intake resistance so as to enhance an engine output. CONSTITUTION:In an air cleaner filter 19 with a plurality of filter elements 26A, 26B of different properties disposed in an approximately semi-circular form, the circumferential ends of the filter elements are integrated via an integrally molding foam material 27 in such a manner as to hold the approximately semi-circular form.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner filter installed in an engine intake system.

[0002]

2. Description of the Related Art An air cleaner is installed in an intake system of an engine for removing dust in the air and reducing intake noise. This air cleaner generally has an air cleaner filter inside the air cleaner body.
As shown in FIG. 6, there is an air cleaner box which does not have an air cleaner box and is composed of only an air cleaner filter.

The conventional air cleaner filter 1 shown in FIG. 6 has two layers of filter elements 2A and 2B, and an outer net 3 is provided outside the filter element 2A.
However, the inner nets 4 are installed inside the filter elements 2B, respectively. By the outer net 3 and the inner net 4, the filter element 2A
And 2B are held in a hemispherical shape. The filter element 2A has a coarse mesh and the filter element 2B has a fine mesh.

[0004]

However, in the air cleaner filter 1 shown in FIG. 6, the filter element 2A is used.
Since the outer net 3 and the inner net 4 are arranged on the front surface of the filter element 2B and the back surface of the filter element 2B, respectively, the intake opening area of the filter elements 2A and 2B may be reduced, and the intake resistance may be increased.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide an air cleaner filter capable of reducing intake resistance and improving engine output.

[0006]

According to a first aspect of the present invention, in an air cleaner filter in which a plurality of layers of filter elements having different properties are arranged in a hemispherical shape, the peripheral ends of the plurality of layers of filter elements are integrated. It is characterized in that the above-mentioned substantially hemispherical shape is retained.

[0007]

Therefore, according to the air cleaner filter of the first aspect, the peripheral end portions of the filter elements of a plurality of layers are integrated, and the air cleaner filter composed of these filter elements is held in a substantially hemispherical shape. It is not necessary to cover the air cleaner filter with a holding member such as a net in order to maintain the substantially hemispherical shape. As the holding member does not exist, the intake opening area of the air cleaner filter can be increased and the intake resistance can be reduced, so that the engine output can be improved.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a half cross-sectional side view showing the left half in a sectional state of an embodiment of the air cleaner filter according to the present invention. FIG. 2 is a sectional view showing an engine intake system to which the air cleaner filter of FIG. 1 is applied.

As shown in FIG. 2, an intake port 12 and an exhaust port 13 are opened in the combustion chamber 11 of the multi-cylinder engine 10. These intake port 12 and exhaust port 13
The intake valve 14 and the exhaust valve 15 are opened and closed respectively. The intake port 12 communicates with an intake passage 16, and the exhaust port 13 communicates with an exhaust passage (not shown).

The intake system 18 of the engine 10 is constructed by sequentially connecting an air cleaner filter 19, an air flow meter 20, a surge tank 21 and an inlet manifold 22. The air flow meter 20 is connected to the surge tank 21 via an air cleaner hose 23. In addition, the inlet manifold 22 has a multi-cylinder engine 1
0 is connected to each intake passage 16.

A throttle valve 24 and a fuel injector 25 are arranged in the inlet manifold 22. Depending on the opening degree of the throttle valve 24, the air sucked from the air cleaner filter 19 is changed to the surge tank 2
1 is introduced into the inlet manifold 22.
The air flow meter 20 detects the amount of introduced air and the temperature of the air, and the fuel injector 25 injects the fuel based on these detected values so as to achieve the optimum air fuel consumption,
Generate a mixture. The generated air-fuel mixture is introduced into each combustion chamber 11 of the engine 10.

Now, the air cleaner filter 19 is
As shown in FIG. 1 and FIG. 3, filter elements 26A and 26B having different properties are laminated and arranged in a substantially hemispherical shape, and these filter elements 26A and 26B are arranged.
The peripheral end portion of is integrally formed by, for example, an integrally molded foam 27 of soft urethane resin. By integrating the peripheral end portions, the filter elements 26A and 26B are held in a substantially hemispherical shape.

The inner periphery of the integrally formed foam 27 is the outer periphery 2 of the funnel-shaped air cleaner duct 28.
9, the foam guide 30 is fitted around the outer periphery of the integrally molded foam 27. The duct portion 31 of the air cleaner duct 28 is connected to the air flow meter 20 shown in FIG.

The filter elements 26A and 26B
The filter element 26A is a thin sponge made of a rough material, and the filter element 26B is a thick sponge made of a fine material. The inner surface of the filter element 26B is provided with an uneven three-dimensional cut 32 to prevent wrinkles from occurring.

The dust in the air sucked into the air cleaner filter 19 is sequentially removed by the filter element 26A with a large particle size and by the filter element 26B with a small particle size. By thus differentiating the properties (coarse and fine) of the filter elements 26A and 26B, the dust is satisfactorily removed while reducing the intake resistance of the air cleaner filter 19.

According to the above-mentioned embodiment, since the peripheral ends of the filter elements 26A and 26B having a plurality of layers are integrated by the integrally formed foam 27, the air cleaner filter 19 is held in a substantially hemispherical shape. In order to maintain the shape, it is not necessary to cover the air cleaner filters 2A and 2B with holding members such as the nets 3 and 4 as in the conventional air cleaner filter 1. As the holding member does not exist, the intake opening area of the air cleaner filter 19 can be increased and the intake resistance can be reduced, so that the output of the engine 10 can be improved.

Since the filter element 26A of the air cleaner filter 19 is provided with the three-dimensional cut 32 on the inner surface thereof, when the filter element 26B is formed in a substantially hemispherical shape, wrinkles are prevented from being generated on the inner surface of the filter element 26B. be able to.

4 and 5 are a half sectional side view and a half sectional plan view, respectively, showing another embodiment of the air cleaner filter according to the present invention. In the other embodiments, the same parts as those in the above embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the air cleaner filter 33 of this embodiment, a curved molded skeleton 34 is erected from the outer peripheral portion 29 of the air cleaner duct 28. This molded skeleton 34
Are arranged at predetermined intervals in the circumferential direction of the outer peripheral portion 29 of the air cleaner duct 28. These molded skeletons 34 are located along the inner surface shape of the filter element 26B. These molded skeletons 34 can reliably prevent the air cleaner filters 26A and 26B from flexing and deforming toward the duct portion 31 of the air cleaner duct 28 during intake by the air cleaner filter 33.

In each of the above-described embodiments, the air cleaner filters 19 and 33 are described as being composed of two layers of filter elements 26A and 26B, but they may be composed of three or more layers of filter elements.

[0021]

As described above, according to the air cleaner filter of the present invention, it is possible to reduce intake resistance and improve engine output.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an air cleaner filter according to the present invention in a sectional state of a left half thereof.

2 is a sectional view showing an intake system of an engine to which the air cleaner filter of FIG. 1 is applied.

FIG. 3 is a plan view showing a left half of the air cleaner filter of FIG. 1 in a sectional state.

FIG. 4 is a side view showing another embodiment of the air cleaner filter according to the present invention in the left half in a sectional state.

5 is a plan view showing the left half of the air cleaner filter of FIG. 4 in a sectional state.

FIG. 6 is a side view of a conventional air cleaner filter showing a left half in a sectional state.

[Explanation of symbols]

 19 Air cleaner filter 26A, 26B Filter element 27 Integrally molded foam 32 Three-dimensional cut

Claims (2)

[Claims] 1. An air cleaner filter in which a plurality of layers of filter elements having different properties are arranged in a substantially hemispherical shape, wherein the peripheral ends of the plurality of layers of filter elements are integrated and the above-mentioned substantially hemispherical shape is retained. Air cleaner filter characterized by. 2. The air cleaner filter according to claim 1, wherein an inner surface of the innermost filter element is three-dimensionally cut.