KR101055828B1 - Fuel Filters for Diesel Engines - Google Patents

Abstract

A fuel filter for a diesel engine according to an exemplary embodiment of the present invention comprises: (i) a housing having a head cover and containing a filter assembly; and ii) disposed in a central portion of the filter assembly through the head cover. A hollow body having an upper end supported by the cover, iii) a heater assembly configured inside the body, iii) a thermo switch configured at the upper end of the body, and iii) a water sensor unit integrally formed with the body. Include.

Diesel, Fuel, Filter, Heater Assembly, Thermo Switch, Water Sensor

Description

Fuel Filter for Diesel Engines {FUEL FILTER FOR DIESEL ENGINE}

An exemplary embodiment of the present invention relates to a fuel supply device of a diesel engine, and more particularly to a fuel filter.

Generally, a fuel filter for a diesel engine is applied to a fuel supply device for supplying fuel stored in a fuel tank to a diesel engine.

Such a fuel filter filters foreign substances contained in diesel fuel and separates and discharges moisture contained in the fuel while heating the fuel so that the fuel does not solidify.

9 is a perspective view schematically showing a fuel filter for a diesel engine according to the prior art.

Referring to the drawings, a fuel filter for a diesel engine according to the prior art includes a filter cartridge 110, a filter head 130 configured above the filter cartridge 110, a filter cartridge 110 and a filter head 130. It consists of a heater 150 configured between.

Here, the heater 150 is for heating the fuel so that the fuel supplied to the diesel engine in the winter or the like does not solidify.

And one side of the filter head 130 is equipped with a thermo switch 160 for controlling the operation of the heater 150.

In addition, the lower portion of the filter cartridge 110 is formed with a water tank unit 170 for storing the moisture contained in the fuel.

The water tank unit 170 is equipped with a water sensor 190 for detecting the water level of the water stored in the water tank unit 170, and the opening and closing of the water tank unit 170.

However, in the fuel filter for the diesel engine according to the prior art, since the filter head 130, the heater 150, the thermo switch 160, and the water sensor 190 are distributed and mounted in the filter cartridge 110, the overall structure is It is complicated and has the problem that the overall size becomes large.

This problem is difficult to set the layout during the design stage, disadvantageous collision safety due to the increase of the number of assembly parts, causing assembly failure, deterioration of assembly workability, and acts as a factor to increase the manufacturing cost and weight .

Exemplary embodiments of the present invention have been created to remedy the above problems, and provide a fuel filter for a diesel engine in which a heater, a thermo switch, and a water sensor are formed as an integrated module.

Accordingly, a fuel filter for a diesel engine according to an exemplary embodiment of the present invention includes: (i) a housing having a head cover and containing a filter assembly; A hollow body having an upper end supported by a head cover, iii) a heater assembly configured inside the body, iii) a thermo switch configured at an upper end of the body, and iii) a water sensor integrally formed with the body. Contains wealth.

In the fuel filter for the diesel engine, the body may be integrally configured with the heater assembly, the thermo switch unit and the water sensor unit in the form of a single module.

In the fuel filter for the diesel engine, the heater assembly and the thermo switch may be connected as an electrical signal system.

In the fuel filter for the diesel engine, the body may be formed in the upper end of the mounting portion for supporting the thermo switch and the water sensor.

The fuel filter for the diesel engine may include a circuit board connected to the water sensor unit as an electrical signal system.

In the fuel filter for the diesel engine, the water sensor unit may be formed as at least one sensor pin.

In the fuel filter for the diesel engine, the housing may form a water tank portion under the filter assembly.

In the fuel filter for the diesel engine, each sensor pin may be formed so that one end protrudes into the water tank portion.

The fuel filter for the diesel engine may be integrally formed by injection molding the body and the sensor pin.

In the fuel filter for the diesel engine, the housing may form a water outlet connected to the water tank portion on the lower surface.

In the fuel filter for the diesel engine, a drain bolt may be installed at the water outlet.

In the fuel filter for the diesel engine, the heater assembly may include a pair of PTC plates and a plurality of PTC elements installed between the PTC plates.

In the fuel filter for the diesel engine, the heater assembly may further include a PTC housing for fixing the PTC plate and the PTC element, and a stopper for closely contacting the PTC plate and the PTC element.

In the fuel filter for the diesel engine, the head cover may form a fuel inlet nipple and a fuel outlet nipple.

In the fuel filter for the diesel engine, the body may form a first passage connected to the fuel inflow nipple on an outer wall and a second passage connected to the first passage therein.

In the fuel filter for the diesel engine, the water tank unit may be connected to the second passage.

The fuel filter for the diesel engine may form a third passage between the filter assembly and the inner wall surface of the housing.

In the fuel filter for the diesel engine, the third passage may be interconnected with the water tank portion and the fuel discharge nipple.

According to the fuel filter for the diesel engine according to the exemplary embodiment of the present invention as described above, since the heater assembly, the thermo switch unit, and the water sensor unit are integrally formed in the body as a single module, the overall structure is simplified, The size can be made compact.

Therefore, in the present embodiment, it is possible to reduce the number of assembly parts and the possibility of assembly failure of the entire filter, to reduce the manufacturing cost and weight, to easily set the layout during the design stage, and to be advantageous for the collision safety of the vehicle. Assembly workability can be further improved.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1 is a combined perspective view illustrating a fuel filter for a diesel engine according to an exemplary embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a plan view of FIG. 1.

Referring to the drawings, the fuel filter 100 for a diesel engine according to an exemplary embodiment of the present invention is for filtering diesel fuel (hereinafter referred to as "fuel" for convenience) supplied from a fuel tank to a diesel engine.

That is, the fuel filter 100 is configured to heat the fuel so that the fuel does not solidify, filter out foreign substances contained in the fuel, separate the moisture contained in the fuel, and collect and discharge the moisture.

The fuel filter 100 for the diesel engine according to the present embodiment basically includes a housing 10 and a hollow body 30, which will be described by configuration.

The housing 10 has an internal space, and is formed in a container shape with an upper end open and a lower end closed. The head cover 11 is mounted on the upper end of the housing 10.

The head cover 11 is provided with a fuel inflow nipple 13 for injecting fuel into the internal space and a fuel discharge nipple 15 for discharging fuel from the internal space.

The head cover 11 forms a mounting hole 17 for mounting the hollow body 30.

The filter assembly 20 for filtering fuel is mounted in the internal space of the housing 10.

FIG. 4 is a cross-sectional configuration diagram of FIG. 1. Referring to this figure, a water tank unit 19 is formed below the housing 10.

The water tank unit 19 is formed below the filter assembly 20 and serves to collect and store water separated from the fuel by the filter assembly 20.

Here, the housing 10 forms a water outlet 16 on the lower surface, the water outlet 16 is connected to the water tank unit 19, the discharge to discharge the water stored in the water tank unit 19 It is made as a passage.

In this case, the water outlet 16 is provided with a drain bolt 18 for selectively opening and closing the water outlet 16.

In this embodiment, the hollow body 30 is inserted into the housing 10 through the mounting hole 17 of the head cover 11, made of a plastic material, takes the form of a cylinder, therein It forms a hollow.

Hereinafter, the hollow body 30 is referred to as "body 30" for convenience, and the body 30 is disposed at the center of the filter assembly 20 in the inner space of the housing 10.

The body 30 is supported by the upper end of the head cover 11, the upper end is formed as a mounting portion 31 for mounting a predetermined part.

FIG. 5 is a block diagram of FIG. 4. Referring to this view, the body 30 includes a first passage 33 (see FIG. 2) connected to the fuel inflow nipple 13.

The first passage 33 is formed on the outer wall of the portion connected to the mounting portion 31 inside the housing 10.

And the body 30 has a second passage 35 connected to the first passage 33, the second passage 35 is formed as an interior space of the body 30, the water of the housing 10 It is connected to the tank 19.

Meanwhile, a third passage 37 connected to the fuel discharge nipple 15 is formed inside the housing 10.

The third passage 37 is formed between the filter assembly 20 and the inner wall surface of the housing 10, is connected to the water tank unit 19 of the housing 10, and the fuel discharge nipple through the filter assembly 20. Interconnected with (15).

6 is an exploded perspective view of the body shown in FIG. 2, and FIG. 7 is a top perspective view of the body.

4 and 5 together with these drawings to further describe the configuration of the body 30, the body 30 is a single module form of the heater assembly 50, the thermo switch unit 70 and The water sensor unit 90 is integrally formed.

In this embodiment, the heater assembly 50 is for heating fuel supplied to the second passage 35 through the fuel inlet nipple 13 and the first passage 33.

The heater assembly 50 is mounted inside the body 30, preferably in the second passage 35 of the body 30.

The heater assembly 50 includes a pair of PTC plates 51 and a plurality of PTC elements 53 installed between the PTC plates 51.

The PTC plates 51 are spaced apart from each other, are installed to be connected to the mounting portion 31 of the body 30, and are electrically connected to the pair of heater terminals 61 configured at the mounting portion 31.

That is, the PTC plates 51 are for applying power to the PTC elements 53 and fixing the PTC elements 53.

Here, the mounting portion 31 is configured integrally with the power connector 63, the power connector 63 is electrically connected to any one heater terminal 61 through the connector plate (65).

The PTC element 53 is fixedly installed between the PTC plates 51 and is provided as a heating element that generates heat by applying current, and is fixed to the PTC plate 51 through bolts or rivets (not shown).

The PTC element 53 is formed as a semiconductor element, and heat is generated when a predetermined current flows, and when the switching temperature is reached by self-heating, the electrical resistance increases to block the current to generate heat at a constant temperature. Done.

In addition, the heater assembly 50 further includes a PTC housing 55 and a stopper 57.

The PTC housing 55 is for fixing the PTC plates 51 and the PTC elements 53 while supporting the PTC plates 51, and is installed at the lower ends of the PTC plates 51.

The stopper 57 is for close contact between the PTC plates 51 and the PTC elements 53 and is interposed between the bolt or rivet (not shown) mentioned above and the other PTC plate 51. .

In this embodiment, the thermo switch unit 70 is for sensing the temperature of the second passage 35 by the heater assembly 50, and controls the operation of the heater assembly 50 in accordance with the temperature.

That is, the thermo switch unit 70 is connected to the heater assembly 50 as an electrical signal system.

The thermo switch unit 70 is configured to the mounting portion 31 of the body 30, is mounted to be connected to the other heater terminal 61 in the heater assembly 50.

Since the thermo switch unit 70 is made of a thermo switch of a known technique that is widely used in the art, more detailed description thereof will be omitted herein.

In the present embodiment, the water sensor unit 90 is for detecting the water level of the water stored in the water tank unit 19 of the housing 10.

The water sensor unit 90 includes at least one sensor pin 91 integrally formed with the body 30, and the sensor pins 91 are preferably provided as a pair.

Each sensor pin 91 is made of a metal material and is injection molded together with the body 30 of a plastic material.

Each sensor pin 91 is configured such that the upper end portion protrudes from the upper surface of the mounting portion 31 of the body 30, and the lower end portion protrudes from the water tank portion 19 of the housing 10.

Meanwhile, the water sensor unit 90 is connected to the circuit board 95 as an electrical signal system.

The circuit board 95 is configured in the mounting portion 31 of the body 30, and the circuit board 95 includes various ICs for receiving a sensing signal output from the water sensor unit 90 and processing the signal. Etc. are installed.

Therefore, the fuel filter 100 for the diesel engine according to the exemplary embodiment of the present invention as described above, the heater assembly 50, the thermo switch unit 70, and the water sensor unit 90 as a single module body ( 30, the overall structure is simplified, and the overall size can be compactly implemented.

Therefore, in this embodiment, it is possible to reduce the number of assembly parts and the possibility of assembly failure of the entire filter, to reduce the manufacturing cost and weight, to easily set the layout during the design stage, and to benefit the collision safety of the vehicle. The assembly workability can be further improved.

Hereinafter, the operation of the fuel filter 100 for a diesel engine according to an exemplary embodiment of the present invention configured as described above will be described in detail with reference to the above-described drawings and FIG. 8.

First, diesel fuel supplied from a fuel tank (not shown) flows into the internal space of the housing 10 through the fuel inflow nipple 13.

The fuel is introduced into the second passage 35 inside the body 30 through the first passage 33 of the body 30 in the interior space of the housing 10.

During this process, the heater assembly 50 is operated by the thermo switch 70, and receives power through the power connector 63 to generate heat from the PTC elements 53.

Therefore, the fuel passes through the second passage 35 and receives heat generated from the heater assembly 50 and is heated to a constant temperature.

The heated fuel is discharged from the second passage 35 to the water tank unit 19 and passes through the filter assembly 20 through the third passage 37.

In this process, foreign matter contained in the fuel is filtered by the filter assembly 20.

In addition, the fuel from which foreign matters are removed is discharged through the fuel discharge nipple 15 and is supplied to a diesel engine (not shown) through a separate fuel supply system (not shown).

In this case, the fuel is maintained in the heated state by the heater assembly 50, and thus is supplied to the diesel engine (not shown) without being solidified.

In this process, the water contained in the fuel is stored in the water tank unit 19 by the difference in specific gravity, the water sensor unit 90 detects the water level of the water stored in the water tank unit 19.

On the other hand, the water stored in the water tank unit 19 is discharged through the water discharge port 16 of the housing 10, the drain bolt 18 is discharged through the water discharge port 16 by loosening.

As a result, in the present embodiment, since the fuel flows downward through the second passage 35 of the body 30, the water contained in the fuel can be separated as a difference in specific gravity from the water, so that the water separation efficiency of the fuel is improved. It is further increased.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

Since these drawings are for reference in describing exemplary embodiments of the present invention, the technical idea of the present invention should not be construed as being limited to the accompanying drawings.

1 is a combined perspective view illustrating a fuel filter for a diesel engine according to an exemplary embodiment of the present invention.

2 is an exploded perspective view of FIG. 1.

3 is a plan view of FIG. 1.

4 is a cross-sectional view taken along the line A-A of FIG.

FIG. 5 is a block diagram of FIG. 4.

6 is an exploded perspective view of the body shown in FIG. 2.

7 is a top perspective view of the body.

8 is a block diagram illustrating the operation of a fuel filter for a diesel engine according to an exemplary embodiment of the present invention.

9 is a perspective view schematically showing a fuel filter for a diesel engine according to the prior art.

Claims (17)

A housing (10) having a head cover (11) to house a filter assembly (20); A hollow body 30 penetrating through the head cover 11 and disposed at the center of the filter assembly 20 and having an upper end supported by the head cover 11; A heater assembly (50) configured inside the body (30); A thermo switch unit 70 formed at an upper end of the body 30; And Water sensor unit 90 is integrally formed with the body 30 Including, The heater assembly 50 includes a pair of PTC plates 51, a plurality of PTC elements 53 disposed between the PTC plates 51, the PTC plate 51 and the PTC elements 53. A fuel filter for a diesel engine, comprising a PTC housing (55) for fixing and a stopper (57) for bringing the PTC plate (51) into close contact with the PTC element (53). The method according to claim 1, The body (30) is a single module form of the diesel engine fuel filter comprising the heater assembly (50), the thermo switch unit 70 and the water sensor unit (90) integrally. The method according to claim 1, A fuel filter for a diesel engine, wherein the heater assembly (50) and the thermo switch unit (70) are connected as an electrical signal system. The method according to claim 1, The body (30) is a fuel filter for a diesel engine to form a mounting portion (31) for supporting the thermo switch unit 70 and the water sensor unit (90) at the upper end. 5. The method of claim 4, And a circuit board (95) connected to the water sensor unit (90) as an electrical signal system in the mounting unit (31). The method according to claim 1, A fuel filter for a diesel engine, wherein the water sensor unit (90) comprises at least one sensor pin (91). The method according to claim 6, The housing (10) is a fuel filter for a diesel engine to form a water tank (19) on the lower side of the filter assembly (20). 8. The method of claim 7, Each sensor pin (91) is a fuel filter for a diesel engine is formed so that one end protrudes into the water tank (19). The method according to claim 6, A fuel filter for a diesel engine, in which the body 30 and the sensor pin 91 are injection molded to be integrated. 8. The method of claim 7, The housing (10) is a fuel filter for a diesel engine to form a water discharge port (16) connected to the water tank unit (19) on the lower surface. The method of claim 10, A diesel engine fuel filter is provided with a drain bolt (18) in the water outlet (16). delete delete The method according to claim 1, The head cover (11) is a fuel filter for a diesel engine to form a fuel inlet nipple (13), and a fuel discharge nipple (15). 15. The method of claim 14, The body 30 forms a first passage 33 connected to the fuel inflow nipple 13 on an outer wall, and a diesel passage forming a second passage 35 connected to the first passage 33 therein. Engine Fuel Filters. The method of claim 15, The housing (10) forms a water tank unit (19) below the filter assembly (20), the water tank unit (19) is connected to the second passage (35) fuel filter for diesel fuel. The method of claim 16, A third passage 37 is formed between the filter assembly 20 and the inner wall surface of the housing 10, and the third passage 37 is the water tank 19 and the fuel discharge nipple 15. Fuel filter for diesel engines interconnected with.

Images