JP3424998B2 - Air filter device for engine intake - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art An air cleaner system is installed in an intake system of an engine for removing dust in the air and reducing intake noise.

However, as a conventional air cleaner device,
Some air cleaner cases can be attached to and detached from an air cleaner case that can be attached to an air cleaner hose. In the air filter device in this case, a filter support material such as a net is bridged in the filter installation frame of the outer frame structural material held by the air cleaner case, and the filter support material supports the air cleaner filter.

Another conventional air cleaner device is one in which an air filter device is directly attached to an intake port of an air cleaner case. In the air filter device in this case, a filter support material such as an inner net is bridged in a filter installation frame of an outer frame structural material such as a funnel attached to an air cleaner hose, and the filter support material supports the air cleaner filter.

At this time, in any of the conventional air filter devices for the air cleaner device, although the filter is held in the filter installation frame of the outer frame structural material by some means, the filter is above the filter support material. It is simply placed on and supported by.

Further, in the conventional air filter device, the filter supporting member is made of a hard metal material such as a stainless steel wire or a perforated stainless steel plate.

[0007]

However, the conventional air filter device has the following problems. The filter support material repeatedly hits the filter that vibrates due to the intake air pulsation of the engine, resulting in the phenomenon that the filter dusts. This dusting phenomenon causes dust captured on the filter inlet side surface to gradually enter the inside of the filter,
Eventually, it will be sucked into the engine side from the filter outlet, reducing the dust collection effect.

As a result of the filter vibrating due to the intake air pulsation of the engine repeatedly striking the hard metal filter support member for a long period of time, the filter support member breaks at the root of its attachment to the outer frame structure material, impairing the filter performance.

Since the filter support material is made of a hard metal material, there is a risk of damage such as bending due to collision with other articles during distribution of the air filter device, attachment to the air cleaner device, or the like.

According to the present invention, in an engine intake air filter device, a filter installed in a filter installation frame.
To the filter support material of the filter held on the support material
The purpose is to prevent the dusting phenomenon caused by dust.

It is another object of the present invention to prevent the filter dusting phenomenon in an engine intake air filter device and to prevent damage during distribution, installation and use.

According to a first aspect of the present invention, there is provided an engine intake air filter device in which a filter supporting member is bridged in a filter installation frame of an outer frame structural member, and the filter is supported by the filter supporting member. Of the engine
Separates from the filter support even if it vibrates due to intake pulsation
In order to prevent the occurrence of such a problem, the filter support is integrally connected.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, the filter support member is made of a flexible elastic material.

[0014]

[Function] The filter is integrally bonded to the filter support member by adhesion or the like. Therefore, even if the filter vibrates due to the intake air pulsation of the engine, it does not separate from the filter support member and is not hit by the filter support member. For this reason,
The dust captured by the filter does not pass through the filter due to a dusting phenomenon as in the conventional case and the dust collection effect is not deteriorated.

The filter support was made of a flexible elastic material. Therefore, the filter support member flexibly follows and follows the vibration of the filter due to the pulsation of the intake air, and does not break at the root part of the attachment to the outer frame structure member.

Since the filter support material has free flexibility, it will not be damaged even if it collides with other articles during distribution of the air filter device, attachment to the air cleaner device, or the like.

[0017]

1 shows an embodiment of an air filter device according to the present invention, (A) is an overall perspective view, and (B) is a sectional view taken along line BB. FIG. 2 is a sectional view showing an intake system of an engine to which the air filter device 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 device 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. Further, the inlet manifold 22 is connected to each intake passage 16 of the multi-cylinder engine 10.

The inlet manifold 22 is provided with a throttle valve 24 and a fuel injector 25. Depending on the opening degree of the throttle valve 24, the air sucked from the air cleaner device 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 the detected values so that the air fuel consumption is optimum, and generates the air-fuel mixture. This generated mixture is the engine 1
0 to each combustion chamber 11.

The air cleaner device 19 is shown in FIG.
As shown in FIG. 3, an air cleaner case 101 is attached to the intake port of the air cleaner hose 23, and the air filter device 110 can be replaceably attached to and detached from the case 101. The air cleaner case 101 includes a lower case 101A fixed to the air cleaner hose 23 and an upper case 101B that can be opened and closed with respect to the lower case 101A and clamped by a clamper 102.
An outer frame structural material 111 of the air filter device 110, which will be described later, can be sandwiched between the 1B in an airtight state.

The air filter device 110 includes the outer frame structural material 1
11, the filter support member 112, and the filter 113 are provided to remove dust in the air guided to the engine 10 and further improve the intake efficiency. Outer frame structure material 11
Reference numeral 1 is a synthetic resin such as polyurethane or rubber, the filter support member 112 is a synthetic resin (flexible elastic material) such as nylon, and the filter 113 is a porous resin such as polyurethane foam.

The air filter device 110 comprises an outer frame structural material 1
11 is provided with a stepped clamped portion 111A on the outer peripheral portion of 11,
The clamped portion 111A is sandwiched between the upper and lower cases 101A and 101B of the air cleaner case 101 in an airtight state. The air filter device 110 includes a combination of a large number of wires in a filter installation frame of the outer frame structural material 111.
Alternatively, a net-shaped filter support material 112 made of a single molded product is bridged. The filter 113 is supported by the filter support material 112.

At this time, the filter 113 is integrally connected to the filter support member 112 by adhesion or the like. Further, as described above, the filter support member 112 is made of a flexible elastic material such as nylon and can flexibly flexibly and elastically deform with respect to an external force.

The filter 113 has a flat plate shape, a coarse outer filter 113A, a fine intermediate filter 113B,
The rough inner filter 113C is joined to form a three-layer structure. These filters 113A, 113B,
113C is made of a porous resin as described above, or a polyurethane resin in this embodiment. Filter 113A, 113
C is a coarse polyurethane resin having large cells (pores), and the filter 113B is a medium-sized polyurethane resin having cells (pores). Outer filter 113
A and the intermediate filter 113B, and the intermediate filter 113B and the inner filter 113C are bonded by heating and melting both adhesive surfaces of these filters (this is referred to as frame lamination).

The intermediate filter 113B and the inner filter 113C sandwich the filter support material 112 and are bonded to the filter support material 112.

Further, the outer filter 1 of the filter 113
13A, intermediate filter 113B, inner filter 113
A high-viscosity adhesive (not shown) is infiltrated into C to enhance the dust collecting effect. This high-viscosity adhesive uses, for example, chlorinated paraffin and has a viscosity of about 100 pa ・ s or more.
It is preferably 350 pa · s or less. Filters 113A and 113 using a solvent (for example, methylene chloride or thinner)
After swelling and softening the fibers of B and 113C, the softened fibers are impregnated with the high-viscosity adhesive.

In the air filter device 110, the outer frame structure material 111, the filter support material 112, and the filter 11
3 are integrally molded and integrated with each other.

The operation of this embodiment will be described below. The filter 113 is integrally bonded to the filter support member 112 by adhesion or the like. Therefore, even if the filter 113 vibrates due to the intake pulsation of the engine 10, the filter support member 11
It does not separate from 2 and is not struck by the filter support 112. Therefore, the dust captured by the filter 113 does not pass through the filter 113 due to the dusting phenomenon as in the conventional case and the dust collection effect is not lowered.

The filter support 112 is made of a flexible elastic material. Therefore, the filter support member 112 flexibly follows and follows the vibration of the filter 113 due to the pulsation of intake air, and is not broken at the base portion of attachment to the outer frame structure member 111.

Since the filter support member 112 has free flexibility, it will not be damaged even if it collides with other articles during distribution of the air filter device 110, attachment to the air cleaner device 19, or the like.

The intermediate filter 113B and the inner filter 113C of the air filter device 110 are the filter support 1
12 is sandwiched from both sides to form the filter support 11
Since it is integrally connected to the air filter 2, the filter support 112 can be hidden from the outside so that the appearance of the air filter device 110 can be improved.

Since the filter 113 is formed of porous polyurethane resin and the high-viscosity adhesive has penetrated into the filter 113, the dust collecting effect can be enhanced by this adhesive. At the same time, this high viscosity adhesive is a cell (pore)
Since even if it is large, it can permeate into the filter 113, so that the flow path resistance of the filter becomes smaller and the intake efficiency can be improved as compared with the case where a fine filter having a small cell is used.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific structure of the present invention is not limited to this embodiment, and changes in design within the scope not departing from the gist of the present invention are possible. Even if it exists, it is included in the present invention. For example, the air filter device of the present invention can be applied to an air cleaner device directly attached to the intake port of an air cleaner hose (the air filter device in this case is an inner net in a filter installation frame of an outer frame structural material such as a funnel). And bridge the filter support material, such that the filter is integrally connected to this filter support material). Further, the filter support member and the filter supported by the filter support member are not limited to the flat plate shape, but may be a curved surface shape such as a hemisphere.

[0035]

As described above, according to the present invention, it is possible to prevent the dust hit phenomenon of the filter in the engine intake air filter device.

Further, according to the present invention, in the engine intake air filter device, it is possible to prevent the filter from tapping and to prevent damage during distribution, installation and use.

[Brief description of drawings]

FIG. 1 shows an embodiment of an air filter device according to the present invention, (A) is an overall perspective view, and (B) is a sectional view taken along line BB.

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

[Explanation of symbols]

110 Air filter device 111 Outer frame structural material 112 Filter support 113 Filter

Claims (2)

(57) [Claims] 1. An engine intake air filter device comprising a filter support member spanning a filter installation frame of an outer frame structure, and the filter support member supporting the filter, wherein the filter vibrates due to intake pulsation of the engine. Even if
An air filter device for engine intake air, which is integrally connected to the filter support member so as not to separate from the filter support member. 2. The engine intake air filter device according to claim 1, wherein the filter support member is made of a flexible elastic material.