KR-102962767-B1 - Fuel filter for LPI system

Abstract

An eco-friendly fuel filter for a liquefied petroleum gas injection system is provided. An eco-friendly fuel filter for a liquefied petroleum gas injection system according to an embodiment of the present invention comprises: a housing formed in a tubular shape to allow liquefied petroleum gas fuel to flow in through a fuel inlet and exit through a fuel outlet; a pair of covers coupled to both ends of an internal filter paper of the housing; a filter paper formed into a cylindrical tubular shape by folding into a corrugated form including a plurality of peaks and valleys at regular intervals, coupled to the pair of covers at both ends, and filtering impurities from the incoming liquefied petroleum gas fuel; and a core inserted into the inner side of the tubular filter paper through which the liquefied petroleum gas fuel flows in and out, and coupled to the pair of covers at both ends.

Inventors

• 한채윤
• 이관수
• 나성택

Assignees

• 주식회사 하이에이치

Dates

Publication Date

20260508

Application Date

20240104

Claims (5)

1. A housing formed in a tubular shape to allow liquefied petroleum gas fuel to flow in through a fuel inlet and exit through a fuel outlet; A pair of covers coupled to both inner ends of the above housing; A filter paper that is folded into a corrugated shape containing multiple peaks and valleys at regular intervals to form a cylindrical tubular shape, is coupled to the pair of covers at both ends, and filters impurities from the incoming liquefied petroleum gas fuel; and A core in which the above-mentioned liquefied petroleum gas fuel flows internally and externally, is inserted into the inner side of the tubularly formed filter paper, and is coupled to the above-mentioned pair of covers at both ends; As an eco-friendly fuel filter for a liquefied petroleum gas injection system comprising, The above housing is, A cap including the fuel inlet into which the above-mentioned liquefied petroleum gas fuel is introduced; and A case including the fuel outlet for discharging liquefied petroleum gas fuel filtered by the above filter paper; Includes, The cover and the filter paper are disposed in the main hollow formed by combining the cap and the case, and The above cover is, An upper cover that is coupled inside the housing into which the above-mentioned liquefied petroleum gas fuel is introduced, and is attached to one end of the filter paper by a heat fusion method to maintain the airtightness of the fuel, and A lower cover that is coupled to the interior of the housing through which the liquefied petroleum gas fuel leaks, and is attached to the other end of the filter paper by a heat fusion method to maintain the airtightness of the fuel. Includes, The upper cover and the lower cover are formed to be coupled to both ends of the core penetrating the filter paper to fix the core, and The main hollow formed inside by the above cap and the above case is, An octagonal prism-shaped tube contacts the cap and the case, forming a space inside, and forms a space where filter paper is placed. The above filter paper is, A filter paper with wrinkles formed in the direction of length extension is wound into a cylinder, and the upper cover and lower cover are heat-fused to the overlapping ends to form a filter hollow. It includes 40 peaks and 40 valleys formed at regular intervals by the above-mentioned wrinkles, The core is inserted along the above-mentioned filtration hollow, and It is configured to filter impurities within the liquefied petroleum gas fuel flowing inside and outside the core, and The above core is, It includes a tubular frame with a through hole formed therein to collect liquefied petroleum gas fuel filtered through the above filter paper, and Characterized by being inserted into the center of the above filter paper to support the inner side in order to prevent inner and outer deformation of the above tubular filter paper. Eco-friendly fuel filter for liquefied petroleum gas injection systems.
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Description

Eco-friendly fuel filter for liquefied petroleum gas injection systems The present invention relates to an eco-friendly fuel filter for a liquefied petroleum gas injection system, and in particular, to an eco-friendly fuel filter for a liquefied petroleum gas injection system that includes an internal support structure to improve the stability of the fuel filter and the economic efficiency of the filter area. With crude oil prices currently soaring, vehicles using diesel or liquefied petroleum gas (LPG, LPI) as fuel instead of gasoline are once again gaining attention in the global automotive market. In particular, as environmental concerns rise and governments and international alliances provide legal sanctions and support to encourage the active development of eco-friendly products, the development of LPG injection vehicles—which liquefy LPG fuel under high pressure and atomize it through injectors—is actively underway. In this context, the fuel filter plays the role of filtering out impurities, such as moisture and dust, present in the vehicle's fuel tank to prevent them from entering the engine cylinders. Vehicles are required to include a fuel filter corresponding to the type of fuel used, and the combustion efficiency and engine performance depend on the performance of this filter. Accordingly, the filtration performance and structural stability of the fuel filter can determine the vehicle's driving efficiency. Meanwhile, conventional fuel filters for liquefied petroleum gas (LPG) utilize a folded filter paper placed within a housing. In this configuration, the folds of the filter paper are formed densely to maintain the structure, and no separate support structure is included. Consequently, an excessive amount of filter paper is used to form these dense folds; consequently, impurities condense between the high-density folds, or the filter paper's structure deforms, leading to limitations where the filter paper obstructs fluid flow over time. Therefore, there is a need for a fuel filter that can stably maintain the filter paper's structure while improving its economic efficiency and effectiveness. FIG. 1 is a perspective view (a) and a cross-sectional view (b) of an eco-friendly fuel filter for a liquefied petroleum gas injection system according to one embodiment of the present invention. FIG. 2 is a cross-sectional view of the housing of an eco-friendly fuel filter for a liquefied petroleum gas injection system according to one embodiment of the present invention. FIG. 3 is an exploded view of the internal structure of the housing of an eco-friendly fuel filter for a liquefied petroleum gas injection system according to one embodiment of the present invention. FIG. 4 is a perspective view (a) and a cross-sectional view (b) of a filter paper for an eco-friendly fuel filter for a liquefied petroleum gas injection system according to one embodiment of the present invention. FIG. 5 is a perspective view of the core of an eco-friendly fuel filter for a liquefied petroleum gas injection system according to one embodiment of the present invention. Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. In the drawings, parts unrelated to the explanation have been omitted to clearly explain the present invention, and the same reference numerals have been used for identical or similar components throughout the specification. Hereinafter, an eco-friendly fuel filter for a liquefied petroleum gas injection system according to one embodiment of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a perspective view (a) and a cross-sectional view (b) of an eco-friendly fuel filter for a liquefied petroleum gas injection system according to one embodiment of the present invention. Here, (a) is a perspective view of an eco-friendly fuel filter for a liquefied petroleum gas injection system, and (b) is a cross-sectional view obtained by cutting the perspective view of (a) along plane b. Referring to FIG. 1, an eco-friendly fuel filter (100) for a liquefied petroleum gas injection system may include a housing (110), a filter paper (130), and a core (140). The eco-friendly fuel filter (100) for a liquefied petroleum gas injection system is used in automotive fuel systems such as LPG and LPI. Specifically, since impurities contained in the fuel tank of the vehicle may mix with the liquefied petroleum gas fuel and pass through to the fuel pump, thereby reducing the combustion efficiency and engine performance of the fuel, the eco-friendly fuel filter (100) for a liquefied petroleum gas injection system can improve engine starting performance by filtering out these impurities and ensuring a smooth fuel supply. At this time, the eco-f