KR20090037218A

KR20090037218A - Automobile fuel sender

Info

Publication number: KR20090037218A
Application number: KR1020070102751A
Authority: KR
Inventors: 황성준
Original assignee: 현대자동차주식회사
Priority date: 2007-10-11
Filing date: 2007-10-11
Publication date: 2009-04-15

Abstract

The present invention relates to a fuel sender device for automobiles, and more particularly, to enable accurate detection of fuel level on a slope without affecting the inclination of the fuel tank, and to serve as a fuel tank ventilation valve. The present invention relates to a fuel sender device.

The present invention described above, the variable resistor unit installed vertically in the fuel tank;

A float portion which is lifted by the fuel tank oil level and lifted along the variable resistance portion;

It is provided on one side of the knitting portion is provided with a fuel sender device for a vehicle comprising a; resistance detection unit for detecting the resistance value of the variable resistance portion according to the height of the float portion.

Description

Automotive Fuel Sender Unit {Automobile Fuel Sender}

In general, the vehicle is provided with a fuel sender for detecting the fuel amount of the fuel tank, the fuel sender is installed inside the fuel tank and floats due to the change in the oil level of the fuel, and rotates about the axis by the float And a ceramic printed resistor substrate in contact with the float arm being rotated and the contact point of the float arm being rotated.

Figure 1 is a schematic configuration diagram showing a conventional fuel system, Figure 2 is an explanatory view schematically showing a conventional fuel sender device, Figure 3 is a cross-sectional view showing the structure of a fuel tank ventilation valve installed in the conventional fuel tank.

As shown in FIG. 1, the fuel tank 1 is provided with a fuel sender 10 for sensing a fuel amount. A detailed description of the fuel sender 10 will be described later with reference to FIG. 2.

In addition, the upper portion of the fuel tank 1 is provided with a fuel tank vent valve 20 (FLVV, Fuel Limit Vent Valve) for collecting and sending the fuel evaporation gas generated in the fuel tank 1 to the canister (2), The fuel tank vent valve 20 is normally opened to deliver fuel evaporation gas toward the canister 2, but when the fuel in the fuel tank 1 is full, the fuel tank vent valve 20 is closed to close the pressure in the fuel tank 1 momentarily. To rise, thus stopping the fueling in the gas gun.

For reference, the gas supply gun inserted into the fuel oil supply pipe 3 to inject fuel is set to stop when the pressure of the fuel tank 1 is detected to be higher than or equal to a predetermined pressure. The fuel tank ventilation valve 20 is If the internal pressure of the tank rises due to the blockage, the operation of the gas gun stops and fueling stops.

The fuel tank ventilation valve 20 has a structure as shown in FIG. 3, and the fuel tank ventilation valve 20 has a fuel ventilation hole 21 formed therein so that the fuel tank ventilation valve 21 floats due to the oil surface buoyancy thereunder. The knitting 22 is installed to float the fuel 22 in the full state of the fuel to block the fuel ventilation hole 21, so that the fuel evaporation gas sent out to the canister 2 through the fuel ventilation hole 21. Is no longer discharged and the internal pressure of the fuel tank 1 becomes high.

On the other hand, the fuel sender 10 shown in Figure 2 is a float 11 that is buoyant by the oil surface of the fuel float, and the float arm 12 is connected to the float 11 and rotated about an axis It is configured to be large, by detecting the rotational displacement in the rotary shaft portion of the float arm 12, the oil level of the fuel tank 1, that is, the amount of fuel is relatively detected.

However, the conventional fuel sender as described above has a problem in that the oil level of the fuel is inclined when the vehicle is located on the inclined road as shown in FIG.

In addition, since the fuel tank is equipped with a separate fuel tank ventilation valve as shown in FIG. 3 in addition to the fuel sender device, the overall component cost increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and its object is to accurately detect fuel amount as much as possible even if the vehicle is placed on a slope so as to minimize the error between the actual fuel amount and the indicated fuel amount. In providing information.

In addition, by integrating the fuel sender device and the fuel tank ventilation valve to reduce the cost required for the production of a separate fuel tank ventilation valve.

In order to solve the above object, the present invention provides a variable resistance unit installed vertically in the fuel tank;

Here, the variable resistance unit, characterized in that consisting of a bar-shaped variable resistance bar made to have a difference in resistance value according to the height, and a bar-shaped ground bar disposed in parallel with the variable resistance bar.

In addition, both ends of the knitting part is installed on the variable resistance bar and the ground bar.

The resistance detector may include a first detector that is in sliding contact with the variable resistance bar, and a second detector that is in sliding contact with the ground bar and electrically connected to the first detector.

In addition, a fuel ventilation hole for discharging fuel evaporation gas is formed at an upper side of the fuel tank facing the knitting part, and the fuel ventilation hole is provided at the knitting part so that the fuel ventilation hole is closed when the fuel tank is completely filled with fuel. It is characterized in that the fuel ventilation valve for closing.

According to the present invention, even if the vehicle is located on the slope and the oil level inside the fuel tank is inclined, the fuel amount can be detected without being greatly influenced by the inclination of the oil level, thereby providing the user with more accurate information about the fuel amount. There is an advantage.

In addition, by enabling the fuel sender device of the present invention to serve as a function of the fuel tank ventilation valve, not only can the space utilization be increased, but also the cost can be reduced by eliminating the cost of manufacturing a single part.

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

Figure 4 is a perspective view showing a fuel sender device according to an embodiment of the present invention, Figure 5 is a schematic view for explaining the configuration of the fuel sender device according to the present invention, Figure 6 is a fuel which is a part of the present invention It is a structural diagram of a tank ventilation valve, and FIG. 7A and 7B is a reference figure for demonstrating the operation | movement state of this invention.

First, referring to FIG. 5, the present invention includes a variable resistor unit 110 installed vertically in the fuel tank 1 and a knitting unit 120 which is elevated along the variable resistor unit 110. ) And a resistance detection unit 130 for detecting a resistance value of the variable resistance unit 110 according to the support height of the knitting unit 120.

The variable resistance unit 110 is preferably installed as perpendicular to the inside of the fuel tank 1, as shown, wherein the variable resistance unit 110 to be as perpendicular to the bottom surface of the fuel tank (1) as possible It is advantageous to be installed in detecting the exact amount of fuel.

Here, the variable resistor unit 110 is arranged parallel to each other and spaced apart by a predetermined distance, the bar-shaped variable resistance bar 111 and the variable resistance bar 111 made to have a difference in resistance value according to the height. It is composed of a bar-shaped ground bar 112 disposed in parallel with.

In addition, the knitting part 120 is lifted by the oil surface of the fuel tank 1 to be lifted along the variable resistor part 110, wherein both ends of the knitting part 120 are the variable resistance bar 111. And it is preferable to be penetrated by the ground bar 112.

That is, the knitting part 120 is inserted into the variable resistance bar 111 and the ground bar 112 together with the variable resistance bar 111 and the ground bar 112 by the buoyancy of the oil surface filled in the fuel tank 1. As it is supported along the bar, if the resistance value of the variable resistance bar 111 corresponding to the position where the knitting unit 120 stops, the lifting height of the knitting unit 120 can be relatively known.

Accordingly, the resistance detecting unit 130 is installed at one side of the knitting unit 120, and the resistance detecting unit 130 has the variable resistance unit 110, in particular, the variable resistance bar according to the lifting height of the knitting unit 120. By detecting the resistance value of 111, the height of the knitting part 120 can be known, and knowing the height of the knitting part 120 makes it possible to know the height of the oil surface, so that the fuel amount can be measured.

Since the variable resistor unit 110 is divided into the variable resistance bar 111 and the ground bar 112, the resistance detection unit 130 is preferably divided.

Accordingly, the resistance detection unit 130 is connected to the first detection unit 131 in sliding contact with the variable resistance bar 111 and the first detection unit 131 in sliding contact with the ground bar 112. The second detector 132 is formed.

The first detection unit 131 detects a resistance value of the variable resistance bar 111 corresponding to the position where the knitting unit 120 is suspended and the first detection unit 131 is connected to the ground bar 112. The resistance value of the variable resistance bar 111 is detected by being electrically connected to the second detection unit 132 in contact with the second detection unit 132.

In this case, the first detection unit 131 and the second detection unit 132 may be connected through a member that can conduct electricity, and in general, it is preferable to be connected by a wire.

Accordingly, the first detection unit 131 and the second detection unit 132 move integrally with the knitting unit 120 on the knitting unit 120 while the knitting unit 120 is positioned at a predetermined position of the variable resistance bar 111. When it stops at, the resistance value corresponding to the position is detected.

As such, the knitting part 120 is horizontally connected to the variable resistance bar 111 and the ground bar 112 installed in parallel to each other, thereby enabling the fuel amount to be detected more accurately without being severely affected by the inclination of the oil surface.

On the other hand, in order to enable the fuel sender device according to the present invention to serve as a function of the fuel tank ventilation valve, the fuel ventilation hole that the fuel evaporation gas is discharged to the upper side of the fuel tank (1) facing the knitting portion 120 140 is formed.

When the fuel tank 1 is completely filled with fuel, the fuel tank vent valve for closing the fuel vent hole 140 at one side of the knitting part 120 to close the fuel vent hole 140 ( 150 is preferably installed, the structure of the fuel tank ventilation valve 150 is shown in detail in FIG.

That is, as illustrated in FIG. 6, a fuel ventilation hole 140 is formed at an upper surface of the fuel tank 1. The fuel tank ventilation valve 150 is formed around the fuel ventilation hole 140 as shown in FIG. 7A. Guide portion 141 is preferably provided to guide smoothly when injured.

In addition, a fuel tank ventilation valve 150 for closing the fuel ventilation hole 140 is installed at one side of the knitting part 120, and the fuel tank ventilation valve 150 may be supported by the knitting part 120. When the fuel tank 1 is filled with fuel when it is injured together, the fuel ventilation hole 140 is closed and blocked as shown in FIG. 7B.

Of course, the fuel tank vent valve 150 may be installed directly on the knitting unit 120, but may be installed on the second detection unit 132 or the first detection unit 131 as shown in FIG. .

It is also preferable that the fuel sender device having the above configuration is formed to be integral with the fuel pump as shown in FIG.

Accordingly, the fuel pump module 200 may be installed at one side of the fuel sender device, and the fuel line 210 and the fuel filter 220 may be installed to communicate with the fuel pump module 200.

As mentioned above, although this invention was demonstrated in detail using the preferable embodiment, the scope of the present invention is not limited to the specific Example described, and the person of ordinary skill in the art is not limited within the scope of this invention. Substitution and modification of the components are possible, which also belongs to the rights of the present invention.

1 is a schematic configuration diagram showing a conventional fuel system;

2 is an explanatory diagram schematically showing a conventional fuel sender device;

3 is a cross-sectional view showing the structure of a fuel tank ventilation valve installed in a conventional fuel tank;

4 is a perspective view showing a fuel sender device according to an embodiment of the present invention;

5 is a configuration diagram for schematically illustrating a configuration of a fuel sender device according to the present invention;

6 is a structural diagram of a fuel tank ventilation valve which is a part of the present invention;

7A and 7B are reference diagrams for explaining the operating state of the present invention.

110: variable resistor section 111: variable resistor bar

112: grounding bar 120: knitting part

130: resistance detection unit 131: first detection unit

132: second detection unit 140: fuel ventilation

150: fuel tank ventilation valve

Claims

A variable resistor unit 110 installed vertically in the fuel tank 1;

A float portion 120 that is lifted by the fuel tank 1 surface and lifted along the variable resistance unit 110;

And a resistance detection unit (130) installed at one side of the knitting unit (120) to detect the resistance of the variable resistance unit (110) according to the height of the support of the knitting unit (120).

The method of claim 1, wherein the variable resistor unit 110,

Automobile fuel, characterized in that consisting of a bar-shaped variable resistance bar 111 made to have a difference in resistance value according to the height, and a bar-shaped ground bar 112 disposed in parallel with the variable resistance bar 111 Sender device.

3. The fuel sender of claim 2, wherein the knitting part (120) is installed to be movable on the variable resistance bar (111) and the ground bar (112).

The method of claim 3, wherein the resistance detector 130,

A first detection part 131 in sliding contact with the variable resistance bar 111 and a second detection part 132 in sliding contact with the ground bar 112 and electrically connected to the first detection part 131. An automotive fuel sender device, characterized in that.

The fuel ventilation hole 140 of any one of claims 1 to 4, wherein an upper portion of the fuel tank 1 facing the knitting part 120 is provided with a fuel ventilation hole 140 through which fuel evaporation gas is discharged. The fuel tank ventilation valve 150 for closing the fuel ventilation hole 140 is provided in the knitting part 120 so that the fuel ventilation hole 140 is closed when the tank 1 is completely filled with fuel. Automobile fuel sender device.