KR100941682B1 - External fuel fill filter for lpi vehicles - Google Patents

Abstract

The present invention relates to an external fuel filler filter for an LPI vehicle, and more particularly, a fuel filler filter is installed between the fuel filler port and the fuel tank to easily filter impurities contained in the fuel before the fuel is introduced into the fuel tank. In addition, the present invention relates to an LPI vehicle external fuel charge filter which can be configured to be easily replaceable when replacing the filter, thereby reducing maintenance and repair costs, and further improving the life of the filter.

The present invention is an LPI vehicle comprising a housing base having a fuel outlet, a housing cover coupled to the housing base in a state where a fuel inlet is formed, and forming a predetermined space therein, and a long hollow-cylindrical filter unit installed at the predetermined space. In the fuel filler filter, the injector nozzle is coupled to the upper portion of the housing cover 10 in a state connected to the fuel inlet 15, the plurality of fuel injection holes 25 in the vertical direction in the fuel inlet (15) 20; The compression spring 50 for pressing the filtration unit 30 toward the housing base 40 in a state of being in close contact with the inner upper portion of the housing cover 10 is further configured, the filtration unit 30 is A filter paper (31) rolled in a pleated form to form a valley in the longitudinal direction; An upper cap 33 of iron coupled to an upper end of the filter paper 31; A lower cap 35 of iron which is coupled to a lower end of the filter paper 31 and has a fitting groove 36 formed in a height direction of the filter paper 31; The upper cap 33 and the lower cap 35 is characterized in that consisting of a plurality of bar magnets 39 are installed between the pleats of the filter paper 31.

Housing cover, injector nozzle, compression spring, filtration part, bar magnet, housing base

Description

EXTERNAL FUEL FILL FILTER FOR LPI VEHICLES}

The present invention relates to an external fuel filler filter for an LPI vehicle, and more particularly, a fuel filler filter is installed between the fuel filler port and the fuel tank to easily filter impurities contained in the fuel before the fuel is introduced into the fuel tank. In addition, the present invention relates to an LPI vehicle external fuel charge filter which can be configured to be easily replaceable when replacing the filter, thereby reducing maintenance and repair costs, and further improving the life of the filter.

In general, a fuel system of a LPI (Liquefied Petroleum Injection) vehicle is equipped with a fuel pump (1) for supplying liquid LPG fuel in a tank in which LPG fuel is stored, as shown in FIG. (1) is equipped with a built-in fuel filter (2), the pumped fuel is injected into the combustion chamber of the engine through the injector 3, the surplus fuel is returned to the tank through the fuel return line (4) It consists of a system.

Here, the built-in fuel filter 2 serves to filter foreign matter in the fuel supplied to the combustion chamber side using the element.

However, the built-in fuel filter 2 has a problem that the filter performance is not high because the structure of the plate filter having a small filter area is easily blocked even when only a short traveling distance of the vehicle is accumulated.

In addition, since the built-in fuel filter 2 is installed inside the pressure tank, it is difficult and difficult to replace the fuel filter due to the problem of gas leakage during the inspection or replacement of the filter.

In order to solve the above problems, by adopting an external fuel filter independently installed on the fuel supply line outside the fuel tank, it is easier and easier to check or replace the fuel filter when inspecting or replacing the fuel filter due to clogging of the fuel filter. "LPI vehicle external fuel filter" (Korean Patent Publication No. 10-0689081), which allows to perform such work, has been proposed.

However, since the filter element is fixed to the upper cap by an adhesive and the filter element is integrally replaced with the upper cap when the filter is replaced, the cost of parts replacement is increased and resources are wasted.

In addition, the element upper cap is mounted directly below the fuel inlet on the lower case side, so that a continuous impact load occurs according to the inlet pressure when the fuel is drawn in, so that the adhesive-attached upper cap is released from the filter element and the continuous impact load As a result, the filter element is deformed, and thus the life is shortened.

In addition, since the debris, which is a major foreign material in the fuel, is directly adsorbed on the filter paper, there is a disadvantage in that the life of the filter is shortened due to premature clogging of the filter.

The present invention was devised to solve the above problems, and an object of the present invention is to collect an existing plate-shaped filter installed by filtering foreign substances contained in the case of charging the fuel before being introduced into the fuel tank. This not only increases the life of the built-in filter, but also makes it possible to filter the fuel more effectively, thereby increasing the purity of the fuel entering the engine.

In addition, unlike the element fixing type, it is possible to replace the filter part to reduce the cost of replacing parts, to facilitate the inspection of the filter part, and the injector nozzle is attached to the housing cover so that the fuel is not injected directly to the upper part of the filter part when filling the fuel. By spraying in the lateral direction, there is no impact load caused by the filling pressure to prevent the detachment of the cap attached to the element.

Furthermore, the rod magnet is installed in the filtration unit to prevent premature clogging of the filter paper, and the magnetic material of the rod magnet is connected to the upper cap and the lower cap so that the magnetism of the rod magnet acts on the upper cap and the lower cap, thereby increasing the range of magnetic force. In order to further extend the life of the filter paper.

The configuration of the present invention for achieving the above object, the housing base is formed with a fuel outlet, the housing cover is coupled to the housing base in a state where the fuel inlet is formed on the housing cover to form a predetermined space therein, and in the predetermined space In the fuel filling filter for an LPI vehicle comprising a long hollow cylindrical filter installed to be installed, coupled to the fuel inlet 15 in the upper portion of the housing cover 10, the plurality of vertical in the fuel inlet (15) An injector nozzle 20 having a fuel injection hole 25 formed therein; The compression spring 50 for pressing the filtration unit 30 toward the housing base 40 in a state of being in close contact with the inner upper portion of the housing cover 10 is further configured, the filtration unit 30 is A filter paper (31) rolled in a pleated form to form a valley in the longitudinal direction; An upper cap 33 of iron coupled to an upper end of the filter paper 31; A lower cap 35 of iron which is coupled to a lower end of the filter paper 31 and has a fitting groove 36 formed in a height direction of the filter paper 31; The upper cap 33 and the lower cap 35 is characterized in that consisting of a plurality of bar magnets 39 are installed between the pleats of the filter paper 31.

As described above, according to the present invention, it is not necessary to collect the plate-shaped built-in filter installed in advance by filtering foreign substances contained in the fuel filling source before being introduced into the fuel tank. In addition to longer lifespan, the fuel can be filtered more effectively, thereby increasing the purity of the fuel being drawn into the engine.

In addition, unlike element fixing, it is possible to replace the filtration part, thereby reducing the cost of replacing parts, and the injector nozzle is attached to the housing cover so that it is injected to the side of the housing instead of directly to the upper cap of the filtration part when filling the fuel. There is no impact load, thereby preventing the detachment of the cap attached to the element.

Furthermore, the rod magnet is installed in the filtration unit to prevent premature clogging of the filter paper, and the magnetic material of the rod magnet is connected to the upper cap and the lower cap so that the magnetism of the rod magnet acts on the upper cap and the lower cap, thereby increasing the range of magnetic force. This has the effect of further extending the life of the filter paper.

Hereinafter, with reference to the accompanying drawings will be described in detail the LPI vehicle exterior fuel charging filter of the present invention.

1 is a schematic view showing a fuel system of a general LPI vehicle, Figure 2 is a schematic diagram showing a fuel system of an LPI vehicle to which the external fuel charging filter for LPI vehicle according to the present invention, Figure 3 is an external fuel for LPI vehicle according to the present invention Figure 4 is an exploded perspective view showing a filling filter, Figure 4 is a cross-sectional view showing a cross-sectional shape of the LPI vehicle exterior fuel charging filter according to the present invention, Figure 5 is a cross-sectional view showing a flat cross-sectional shape of the LPI vehicle exterior fuel charging filter according to the present invention. to be.

As shown in FIG. 1 to FIG. 5, the LPI vehicle exterior fuel charging filter according to the present invention is

A housing cover 10 having a fuel outlet 45 formed therein, a housing cover 10 bolted to the housing base 40 in a state where a fuel inlet 15 is formed at an upper portion thereof, and forming a predetermined space therein; The long hollow cylinder-shaped filter unit 30 is installed in a predetermined space, coupled to the fuel inlet 15 in the upper portion of the inner cover of the housing cover 10 and a plurality of fuel injection in the vertical direction to the fuel inlet (15) An injector nozzle 20 having a ball 25 formed therein, and a compression spring 50 for pressing the filtration unit 30 toward the housing base 40 in a state of being in close contact with the inner upper portion of the housing cover 10. It is composed.

The housing base 40 has a fuel outlet 45 formed at an upper portion along a central axis and penetrated to the outside in a state having an angle of 90 degrees. The housing base 40 protrudes a predetermined height upward with respect to the fuel outlet 45. And a protrusion 41 having a fastening groove 42 having a predetermined depth on its outer circumferential surface.

The housing cover 10 is a cylinder having a predetermined space therein, one side is bolted to the housing base 40.

On the other side of the housing cover 10, the fuel inlet 15 penetrated therein is formed at an angle of 90 degrees such that fuel drawn from the fuel filling hole 6 of the vehicle is introduced into the housing cover 10. The injector nozzle 20 having a plurality of fuel injection holes 25 formed therein is connected to the fuel inlet 15 at an inner upper portion of the housing cover 10.

Here, the injector nozzle 20 is a hexagonal bolt shape fuel injection hole for injecting the fuel coming from the fuel inlet 15 to at least two or more of the outer surface in the circumferential direction of the housing cover 10 25 is formed.

The filtration unit 30 is installed in a space formed therein due to the coupling of the housing cover 10 and the housing base 40, and is fitted to the protrusion 41 of the housing base 40.

Here, the filter unit 30 is a filter paper 31, which is rolled in a corrugated form so as to create a valley in the longitudinal direction, the upper cap 33 of the steel coupled to the upper end of the filter paper 31, and the filter paper 31 Coupled to the lower end of the filter paper in the state in which the lower cap 35 of the steel fitting groove 36 is formed in the height direction of the filter paper 31, the upper cap 33 and the lower cap 35 connected Consists of a plurality of rod magnets (39) installed between the pleats of the 31, the fitting groove 36 of the lower cap 35 is fitted to the projection 41 of the housing base 40 It is coupled with the housing base 40.

In this case, when the fuel passing through the filtration unit 30 is introduced into the fuel outlet 45 of the housing base 40, the filtered fuel is inserted into the coupling groove 42 of the protrusion 41. 45 is equipped with a ring-shaped airtight opening 46 for preventing a loss without entering into the airtight opening, and the airtight opening 46 not only prevents fuel from being lost but also fits into the protrusion 41. The 35 is coupled in a more intimate state so that the filtration unit 30 is more stably coupled to the housing base 40.

In addition, the rod magnet (39) provided in the filter unit 30 is attached to the iron oxide debris, which is the main impurity of the fuel to the filter paper 31 prevents premature clogging, thereby helping to extend the life of the filter, The upper cap 33 and the lower cap 35 of the metal material connected to the bar magnet 39 also have a magnetic function to attach the main impurities.

In addition, it serves as a reinforcing material for preventing the warpage or warping of the filter paper 31 by the filling pressure of the filling fuel.

On the other hand, a pressing spring 50 for pressing the filtration unit 30 toward the housing base 40 in the inner upper portion of the housing cover 10 in the state in which the injector nozzle 20 is located at the center of the housing cover 10. It is in close contact with the inner upper portion of the housing cover 10.

Looking at the operation and effect of the present invention configured as described above, the fuel filling filter is installed on the valve (8) connecting the fuel filling port (6) and the fuel tank (7).

Subsequently, when the fuel is charged, the fuel coming from the fuel filling hole 6 is introduced into the housing cover 10 through the fuel inlet 15 of the housing cover 10, wherein the introduced fuel is Through the fuel ejection hole 25 formed in the injector nozzle 20 is ejected toward the inner wall surface of the housing cover 10.

That is, the fuel is introduced into the inside of the housing cover 10 to be ejected to the fuel injection hole 25 of the injector nozzle 20 so that the filling pressure generated during charging is the upper cap 33 of the filtration unit 30. ) Is not directly sprayed to prevent the separation of the upper cap (30).

Thereafter, the fuel flows through the filter paper 31 to the fuel outlet 45 of the housing base 40.

At this time, the iron oxide debris, which is the main impurity of the fuel, not only adheres to the rod magnet 39, but also affects the magnetism of the rod magnet 39 on the upper cap 33 and the lower cap 35 so that impurities of the fuel adhere. Thus, the life of the filter paper 31 is extended.

In the continuous use in this state, when the filter is replaced, the housing cover 10 is separated, and only the filtration unit 30 is separated from the housing base 40 and replaced, thereby reducing the cost of replacing parts. .

On the other hand, when installing between the fuel tank (7) and the fuel filling hole (6) to install the filling filter of the present invention, the housing cover to facilitate the connection of the pipe in a narrow space without using a separate 90 degree L-type nipple The fuel inlet 15 of the 10 and the fuel outlet 45 of the housing base 40 are formed to have a constant angle.

As described above, specific embodiments of the present invention have been described in detail, but those skilled in the art will appreciate that various modifications can be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined not only by the claims below but also by those equivalent to the claims.

1 is a schematic view showing a fuel system of a typical LPI vehicle;

2 is a schematic diagram showing a fuel system of an LPI vehicle to which an external fuel charging filter for an LPI vehicle according to the present invention is applied;

3 is an exploded perspective view showing an external fuel charging filter for an LPI vehicle according to the present invention;

Figure 4 is a cross-sectional view showing the cross-sectional shape of the LPI vehicle exterior fuel charging filter according to the present invention,

Figure 5 is a cross-sectional view showing a flat cross-sectional shape of the LPI vehicle exterior fuel charging filter according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: fuel pump 2: fuel filter

3: injector 4: fuel return line

6: fuel filling hole 7: fuel tank

8: valve 10: housing cover

15: fuel inlet 20: injector nozzle

25: fuel injection hole 30: filtration unit

31: filter paper 33: upper cap

35: lower cap 36: fitting groove

39: bar magnet 40: housing base

41: protrusion 42: fastening groove

45: fuel outlet 46: airtight

50: crimp spring

Claims (5)

delete A fuel filling filter for an LPI vehicle including a housing base having a fuel outlet, a housing cover coupled to the housing base in a state where a fuel inlet is formed, and forming a predetermined space therein, and a long hollow-cylindrical filter installed in the predetermined space. To An injector nozzle 20 coupled to a fuel inlet 15 at an upper portion of the housing cover 10 and having a plurality of fuel injection holes 25 formed in a direction perpendicular to the fuel inlet 15; The compression spring 50 for pressing the filtration unit 30 toward the housing base 40 in a state in close contact with the inner upper portion of the housing cover 10 is configured to further include, The filter unit 30 and the filter paper 31 is rolled in a pleated form to produce a bone in the longitudinal direction; An upper cap 33 of iron coupled to an upper end of the filter paper 31; A lower cap 35 of iron which is coupled to a lower end of the filter paper 31 and has a fitting groove 36 formed in a height direction of the filter paper 31; External fuel charging filter for an LPI vehicle, characterized in that consisting of a plurality of rod magnets (39) installed between the pleats of the filter paper 31 in a state connecting the upper cap 33 and the lower cap 35. The method of claim 2, The housing base 40 is formed with a protrusion 41 to allow the filtration unit 30 to be fitted, and an airtight hole 46 for maintaining the airtightness of the filtered fuel is coupled to the outer circumferential surface of the protrusion 41. Exterior fuel charge filter for LPI vehicle. The method of claim 2 or 3, Fuel inlet (15) formed in the housing cover 10 is an external fuel charging filter for an LPI vehicle, characterized in that it is formed to be bent at a predetermined angle. The method of claim 4, wherein The fuel outlet (45) formed in the housing base (40) is LPI vehicle exterior fuel charging filter, characterized in that formed to be bent at a predetermined angle.

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