KR20020019633A - An air cleaner for LPG car - Google Patents

Abstract

PURPOSE: An air cylinder for an LPG(Liquefied Petroleum Gas) cylinder is provided to rapidly increase inner pressure by generation of backfire and to exactly combine a cover with a case. CONSTITUTION: An air cylinder for an LPG cylinder comprises a case(2) dividing an air cleaner(1) into a dust side and a clean side; a cover(3) surrounding an upper portion of the case; a screw member(4) installed between the case and the cover; a screw unit formed on the screw member; an opening port(5) arranged on an upper side of the case; an opening port(6) formed on a lower side of the cover; a nut member(9) installed on an upper portion of a washer member(8); and a spring(10) supported on the lower side of the cover. Thereby, the air cylinder for the LPG cylinder rapidly increases inner pressure by generation of backfire to exactly engage the cover and the case.

Description

An air cleaner for LPG car}

The present invention relates to an air cleaner, and more particularly, to an LPG vehicle air cleaner which can be returned again after the cover is temporarily removed from the case by the pressure at the time of backfire in the LPG vehicle.

As is well known, the air cleaner is to prevent the engine from abrasion which may be caused by the dust in the air sucked into the engine (including hard materials such as silica, alumina, etc.) entering the engine, and also In coordination with the intake duct and the resonator located before and after, the intake noise is reduced. In addition, it improves volume efficiency by reducing ventilation resistance and controlling resonance boosting for improved output performance.

The air cleaner consists of a case and a cover which separate the air filter, the dust side and the clean side, and has a structure in which the filter can be taken out and cleaned or replaced. Filters are wet and dry, and wet is the impregnation of the filter paper with oil, so that the oil penetrates the attached dust, which forms a new filter layer, which reduces clogging and does not require cleaning.

On the other hand, dry type has filter knowledge and nonwoven type, and the filter knowledge can filter out very fine dust, but it requires regular exchange and exchange. Since the nonwoven fabric has a density gradient and captures dust in each layer according to the size of the dust, the dust capture amount is large and the filtration area can be made small.

As shown in FIG. 1, the plastic air cleaner is coupled to each other by a plurality of bolts 53 and a plurality of clips 54 fastened to edges thereof in a state in which the cover 51 and the case 52 are joined to each other. have. The cover 51 and the case 52 of the air cleaner may be coupled to each other using only the clip 54 instead of the bolt.

Meanwhile, the cover 51 and the case 52 of the forced air cleaner are coupled to each other by a plurality of wire clamps 55 as shown in FIG. 3.

However, when the conventional air cleaner having the coupling structure as described above is used in a gasoline engine vehicle or a diesel engine vehicle, there is no problem. However, when used in an LPG vehicle, a back fire occurs to cause the air cleaner. When the internal pressure suddenly rises rapidly, there is a problem that the air cleaner is broken by removing the cover from the case.

In addition, in the case of the air cleaner in which the cover and the case are joined by a wire, the cover and the case due to the deformation of the wire clamp are formed by a momentary increase in the internal pressure due to backfire, and then the cover is detached from the case and then rejoined. By not combining correctly, there is a problem that may hinder the normal running of the vehicle and have a fatal effect on the engine.

Accordingly, an object of the present invention is to provide an LPG vehicle air cleaner having a structure in which the cover and the case can be accurately combined when the cover is separated from the case and recombined rapidly due to the occurrence of backfire. It is.

1 is a perspective view schematically showing a conventional plastic air cleaner in which a cover and a case are coupled by clips and bolts.

Figure 2 is a perspective view schematically showing a conventional forced air cleaner coupled to the cover and the case by a wire.

Figure 3 is a cross-sectional view showing the inside of the air cleaner coupled to the cover and the case by the bolt and the seal in accordance with the present invention.

4 is a cross-sectional view showing the interior of the air cleaner shown in FIG. 3 showing the state of the cover and the case when backfire occurs.

(Explanation of symbols for the main parts of the drawing)

1: air cleaner 2: case

3: cover 4: screw member

8 washer member 9 nut member

10: spring 11: sealing material

13: sidewalls

The object as described above, the case for separating the air filter, dust side and clean side; A cover covering an upper portion of the case; A screw member extending through the opening formed in the upper surface of the case and the opening formed in the lower surface of the cover and extending into the cover, the head being fixed inside the upper surface of the case; A washer member positioned in the cover and penetrating the threaded portion of the screw member; A nut member fastened to an end of a screw portion of the screw member at an upper portion of the washer member; It can be achieved by the LPG vehicle air cleaner according to the invention characterized in that it comprises a spring supported on the lower surface of the cover to press the washer member to the nut member.

The LPG vehicle air cleaner according to the present invention may further include a sealing material positioned between the case and the cover and having a hole through which the threaded portion of the screw member passes for airtightness between the case and the cover.

The seal is preferably formed of an elastic rubber.

In the above, the washer member preferably has a cylindrical sidewall extending downward to block the spring from outside to prevent foreign matter from adhering to the spring.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

Figure 3 is a cross-sectional view showing the inside of the air cleaner coupled to the cover and the case by the bolt and the sealing material in accordance with the present invention.

As shown in FIG. 3, the LPG vehicle air cleaner 1 according to the present invention includes a case 2 separating an air filter, a dust side, and a clean side, and a cover 3 covering an upper portion of the case 2. Include.

A screw member 4 is provided between the case 2 and the cover 3, and the screw member 4 has an opening 5 and a cover having a threaded portion 4a formed on the upper surface 2 of the case 2. It extends into the cover 3 through the opening 6 formed in the lower surface 3a of 3). The head 7 of the screw member 4 is fixed inside the upper surface 2a of the case 2 by means such as welding.

The threaded portion 4a of the screw member 4 penetrates the washer member 8 located in the cover 3, and the end of the screw member 4 is nut member 9 located above the washer member 8. Is fastened to. A spring 10 supported on the lower surface 3a of the cover 3 is provided on the cover 3 to press the washer member 8 with the nut member 9. Therefore, the upper surface of the washer member 8 is in contact with the lower surface of the nut member 9 fastened to the end of the screw member 4.

Meanwhile, in the LPG vehicle air cleaner 1 according to the present invention, a sealant 11 may be positioned between the case 2 and the cover 3 for airtightness between the case 2 and the cover 3. The sealing material 11 has a hole 12 through which the threaded portion 4a of the screw member 4 passes. The sealing material 111 is preferably formed of an elastic rubber.

In addition, the washer member 8 preferably has a cylindrical sidewall 13 extending downward to block the spring 10 from the outside to prevent foreign matter from adhering to the spring 10.

According to the present invention, when the air cleaner 1 has the structure as described above, if the pressure inside the air cleaner 1 is increased suddenly suddenly by the occurrence of backfire, as shown in FIG. The cover 3 is raised with the screw member 4 as the axis. At this time, the spring 10 is compressed between the lower surface 3a of the cover 3 and the washer member 8.

When the internal pressure of the air cleaner 1 is reduced, the cover 3 is returned to its original position along the screw member 4 by the spring force of the spring 10. On the other hand, the tension of the spring 10 may be selected according to the vehicle model.

According to the LPG vehicle air cleaner according to the present invention having the structure as described above, when the back pressure is suddenly increased by the occurrence of backfire, when the cover is separated from the case and recombined, the cover and the case are correctly combined. Can be.

Claims (4)

A case separating the air filter, the dust side and the clean side; A cover covering an upper portion of the case; A screw member extending through the opening formed in the upper surface of the case and the opening formed in the lower surface of the cover and extending into the cover, the head being fixed inside the upper surface of the case; A washer member positioned in the cover and penetrating the threaded portion of the screw member; A nut member fastened to an end of a screw portion of the screw member at an upper portion of the washer member; And a spring supported on the lower surface of the cover to press the washer member to the nut member. The LPG vehicle air cleaner of claim 1, further comprising a sealing material positioned between the case and the cover and having a hole through which the threaded portion of the screw member passes for airtightness between the case and the cover. . 2. The LPG vehicle air cleaner of claim 1, wherein the seal member is formed of an elastic rubber. 3. The LPG vehicle air cleaner of claim 1 or 2, wherein the washer member has a cylindrical side wall extending downward to block the spring from the outside to prevent foreign matter from adhering to the spring.