KR20010036118A - Automatic water separator device of fuel tank - Google Patents

Abstract

PURPOSE: An automatic moisture exhauster is provided to prevent the corrosion and the imperfect combustion of a fuel system due to moisture by automatic exhausting moisture separated from fuel. CONSTITUTION: Moisture collecting barrel(12) and a drain cock(9) are installed on the lower end of a fuel tank(1). A floating ring(7) floating in moisture and sinking in a fuel is mounted in moisture collecting barrel(12). An upper and a lower limit sensors(5,6) for checking the upper and the lower limits of moisture are provided. A solenoid valve(10) opens/closes the drain cock(9) according to the floating ring(7) detection signal of the sensors(5,6). Thus, moisture separated from the fuel is automatically exhausted outwards if the quantity of the moisture becomes a predetermined quantity.

Description

Automatic water separator device of fuel tank

The present invention relates to an automatic device for draining water from a fuel tank.

Water is contained in fuels such as gasoline and diesel for driving the internal combustion engine.

This fuel contains not only moisture but also foreign substances such as dust, and a fuel filter is installed to remove these foreign substances and moisture. If the moisture is not removed, premature wear due to corrosion of the injection pump and fuel nozzle occurs. In addition, since the engine power is lowered and the smoke is increased due to incomplete combustion, a fuel water separator (Sedimenter, water seperator) for removing water in the fuel is usually provided.

The water separated from the fuel through the fuel water separator in the fuel tank is discharged to the outside of the fuel tank 2 when the coke valve 21 installed at the bottom of the fuel tank 20 is opened as shown in FIG. 4. Doing.

However, since most drivers do not even know that there is a coke valve 21 for discharging water in the fuel tank 20, it is hard to take measures to discharge water on a regular basis. As well as causing, the moisture gathered around the coke valve 21, which is the lowest position in the fuel tank 20, freezes in winter, causing water separator breakage.

Accordingly, the present invention has been proposed in view of the above point, and an object thereof is to automatically discharge water separated from a fuel, thereby providing an automatic water discharge device of a fuel tank which prevents corrosion and incomplete combustion of a fuel system caused by water. There is.

In order to achieve the above object, the present invention provides a water collection passage provided at the bottom of the fuel tank;

A knitting ring accommodated in the water collecting container and set to a specific gravity smaller than water and larger than a fuel so as to follow the water and move up and down;

An upper limit sensor installed to detect an upper limit amount of water collected in the water collecting container;

A lower limit sensor for detecting a lower limit of moisture to prevent an external discharge of fuel when discharging the moisture collected in the moisture collection container to the outside;

A drain cock provided at a bottom of the water collecting container;

A solenoid valve for opening and closing the drain cock;

And an electronic controller configured to open the solenoid valve in response to the upper limit sensor detecting the knitting ring, and to control the lower limit sensor to shut off the solenoid valve in response to the signal detecting the knitting ring.

According to the description of claim 2 of the present invention

When the solenoid valve is operated to open the drain cock, the compressed air stored in the compressed air storage tank is discharged to the outside through the drain cock, and the moisture in the water collecting container is discharged together with the compressed air by the discharge pressure of the compressed air. Characterized in that the discharge flow to the furnace takes place.

1 is a view showing an automatic water discharge device of the fuel tank according to the present invention.

2 is a circuit diagram of the device of the present invention;

3 is a control flowchart of the present invention.

4 is a prior art

※ Explanation of code for main part of drawing

1: fuel tank 2: moisture collector

3: moisture 4: fuel

5: upper limit sensor 6: lower limit sensor

7: knitting ring 8: electronic control device

9: drain cock 10: solenoid valve

11 passage 12 compressed air storage tank

13: hose 15: plunger

16: hole 17: passage

18: passage

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

1 is a view showing the automatic water discharge device of the fuel tank according to the present invention, Figure 2 is an operating circuit diagram of the present invention, Figure 3 is a control flowchart of the present invention.

Reference numeral 1 in the drawings denotes a fuel tank for storing fuel, and a water collecting container 2 is provided at the bottom of the fuel tank 1. The water collecting container 2 is located at the lowest point of the fuel tank 1, so that the water 3 separated from the fuel has a greater specific gravity than the fuel 4, and thus collects in the lower part of the water collecting container 2.

An upper limit sensor 5 and a lower limit sensor 6 are respectively installed near the upper and lower ends of the water collector 2, and the upper limit sensor 5 has a predetermined limit (upper limit) of water level collected in the moisture collector 2. When it reaches, the knitting ring 7 which moves up and down in association with the water level of the water is detected and the detection signal is output.

The knitting ring 7 is formed of a plastic body having a specific weight in the range of specific gravity less than water and larger specific gravity than fuel, that is, a range of about 920 kg / m 3 <knit ring specific weight <1000 kg / m 3. 2) Floating in the moisture collected inside, and sinks in the fuel.

Accordingly, when the upper limit sensor 5 detects the knitting ring 7, it is determined that the moisture collected in the moisture collection container 2 has reached the upper limit.

In addition, when the lower limit sensor 6 detects the knitting ring 7, it means that the moisture is as much as the lower limit, and the upper and lower limit information of the moisture detected by the upper and lower limit sensors 5 and 6 indicates the electronic control device. It is input in (8).

The bottom of the water reservoir (2) is provided with a drain cock (9) for discharging water, the drain cock (9) is opened and closed by the solenoid valve (10).

And the solenoid valve 10 is controlled to be operated by the control signal output of the electronic control device (8).

The water discharge passage 11 of the drain cock 9 is connected to the hose 13 via the solenoid valve 10 so as to communicate with the compressed air storage tank 12.

Such an operation of the present invention will be described with reference to FIGS. 2 and 3.

When the ignition key 14 is turned on (step), the electronic controller 8 determines whether there is an output of a detection signal of the knitting ring 7 from the upper and lower limit sensors 5 and 6 (step b).

At this time, if there is no output of the high level signal from the upper limit sensor 5, the process returns to step (b) to check whether there is a continuous signal detection, and when the high level signal is detected, the solenoid valve 10 is operated to operate the plunger 15. By advancing, the hole 16 and the passage 17 and the passage 11 coincide to control the drain cock 9 to be opened (step c). When the drain cock 9 is opened, the high pressure compressed air in the compressed air storage tank 12 is discharged at high speed to the outside through the passages 18, 17 and 11, and moisture is collected by the flow rate and the negative pressure at this time. Moisture in the keg 2 is discharged to the outside of the drain cock 9 through the hole 16, the passage 17, and the passage 11.

When the water in the water collecting container 2 is discharged to the outside, the knitting ring 7 is lowered according to the lowered water level, and the drain cock 9 of the drain cock 9 is detected until the knitting ring 7 is detected by the lower limit sensor 6. The open state persists. Then, if it is detected through the lower limit sensor 6 that the knitting ring 7 has reached the lower limit position (step e), the electronic controller 8 controls the solenoid valve 10, i.e., stops supplying the solenoid. The plunger 15 of the valve 10 returns to its original state to block the drain cock 9, whereby the discharge of compressed air and water is stopped (step bar).

According to the present invention as described above, a water collector and a drain cock are installed at the lower end of the fuel tank, and a float ring which floats in water and sinks in the fuel is built in the fuel collector, and detects the upper and lower limits of the collected moisture. By providing a solenoid valve for opening and closing the drain cock by the knitting ring detection signal by the upper and lower limit sensors, the water separated from the fuel is automatically discharged to the outside whenever a certain amount is reached. There is an effect of preventing corrosion and incomplete combustion.

Claims (2)

A water collecting passage provided at the bottom of the fuel tank; A knitting ring accommodated in the water collecting container and set to a specific gravity smaller than water and larger than a fuel so as to follow the water and move up and down; An upper limit sensor installed to detect an upper limit amount of water collected in the water collecting container; A lower limit sensor for detecting a lower limit of moisture to prevent an external discharge of fuel when discharging the moisture collected in the moisture collection container to the outside; A drain cock provided at a bottom of the water collecting container; A solenoid valve for opening and closing the drain cock; And an electronic controller configured to open the solenoid valve in response to the upper limit sensor detecting a knitting ring, and to control the lower limit sensor to shut off the solenoid valve in response to a signal detecting the knitting ring. Automatic water discharge device of the fuel tank characterized in that. The method of claim 1, When the solenoid valve is operated to open the drain cock, the compressed air stored in the compressed air storage tank is discharged to the outside through the hose, the plunger and the drain cock communicated with each other, and the pressure of the compressed air in the water collecting tank Automatic discharge device for water in the fuel tank, characterized in that the discharge flow to the outside along with the compressed air.