KR100461396B1 - multi function fuel valve for a vehicle - Google Patents

Abstract

The present invention provides a multifunctional fuel valve for a vehicle that enables the fuel check valve combined two-way valve, vent valve, one-way valve and separator to be performed in a single component, thereby improving assembly workability and reducing the number of parts. In addition to the effects, the risk of leakage of evaporation gas is greatly reduced.

Description

Multi function fuel valve for a vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel device of a vehicle, and more particularly, to a technology capable of simplifying the configuration of various valve devices installed in a fuel tank.

FIG. 1 illustrates a conventional vehicle fuel device configuration. When the fuel pump 102 installed in the fuel tank 100 pumps fuel, the fuel is pumped through the fuel filter 104 to the delivery pipe 106. To be injected through the injector;

The boil-off gas generated in the fuel tank 100 is sent to the separator 112 through the fuel check valve combined two-way valve 108 and the vent valve 110, where the liquefied fuel is passed through the one-way valve 114. The gas is introduced into the fuel tank 100 again, and the remaining evaporated gas is collected in the canister 116 and then flows into the engine intake by the operation of the purge control solenoid valve (PCSV) to be combusted.

The fuel check valve combined two-way valve 108 is configured to perform the function of the conventional fuel check valve and the two-way valve as shown in Figure 3, installed through the upper side of the fuel tank 100 The case 108-1, the check valve spool 108-2 embedded in the lower side of the case 108-1, and the check valve spool 108-2 are lowered by their own weight when the vehicle body is rolled over, and the central cylinder Pressure installed in a direction blocking the upper side of the valve passage body (108-5) and the central passage (108-4) in the central portion of the case (108-1) to close the furnace (108-4) The valve spool 108-6 and the through hole 108-7 formed around the central passage 108-4 are closed when the pressure in the fuel tank 100 is large and the pressure in the fuel tank 100 is vacuumed. It consists of a vacuum valve flap (108-8) to be shut off.

When the internal pressure rises due to a large amount of boil-off gas inside the fuel tank 100, the pressure valve spool 108-6 opens the central passage 108-4 to send the boil-off gas to the canister 116. When the pressure inside the fuel tank 100 decreases due to exhaustion of the fuel tank 100, the vacuum valve flap 108-8 opens the through hole 108-7 to release the vacuum, such as overturning the vehicle. In this case, the check valve spool 108-3 closes the central passage 108-4 by its own weight to block the leakage of fuel.

The vent valve 110 allows the evaporation gas to flow into the canister 116 more smoothly when the fuel is filled, thereby preventing the leakage of the evaporation gas through the fuel inlet, and allowing the fuel tank to detect the fuel filling state. In the case of overturning and the like to perform the function to block the external leakage of fuel, the structure is as shown in FIG.

That is, the case 110-1 installed through the upper side of the fuel tank 100 and the float 110-2 embedded in the lower side of the case 110-1 so as to move up and down according to the oil level of the fuel. The valve body 110-4 is configured to close the gas passage 110-3 connected to the canister 116 from the inside of the fuel tank 100 by pushing the float 110-2 upward when the fuel is full. And a spring (110-5) for holding the valve body (110-4) upward, a plunger (110-6) which is caused to perturb upward and downward from the upper side of the valve body (110-4). It is comprised by the metal ball 110-7 which supports the said valve body 100-4 downward through the plunger 110-6.

When the fuel is refueled and the fuel does not reach the nominal capacity, the valve body 110-4 does not close the gas passage 110-3, so that the boil-off gas passes through the gas passage 110-3. 116, and when the fuel is full, the float 110-2 moves the valve body (110-4) upwards and pushes the metal ball (110-7), gas passage (110-3) ) By closing the fuel tank 100 by the pressure rise in the fuel tank 100 to stop the oil supply, and in the case of rolling over, such as the spring (110-5) the valve body (110-4). Push to block the gas passage (110-3) to block the external leakage of fuel.

On the other hand, the separator 112 has a closed space therein to circulate the boil-off gas from the fuel check valve combined two-way valve 108 and the vent valve 110 to the canister 116 to extract the liquid fuel and vapor phase Only the boil-off gas is supplied to the canister 116, and the fuel changed into the remaining liquid phase is recovered to the fuel tank 100 through the one-way valve 114.

2 shows the state in which the above components are installed in the fuel tank, the fuel check valve combined two-way valve 108, vent valve 110, one-way valve 114 and the separator 112, etc. A number of hoses are connected to the fuel tank in a highly complex structure.

Therefore, in the structure as described above, the possibility of fuel leakage is high at the connecting parts of the valves, separators, hoses, and the like as described above, and it is difficult to cope with the recently tightened regulations on the boil-off gas of each country. There is a problem in that many parts are required and assembly workability is also reduced.

Accordingly, the present invention has been made in order to solve the problems described above, by allowing the functions such as fuel check valve combined two-way valve, vent valve, one-way valve and separator to be performed in a single component, assembling workability It is an object of the present invention to provide a multifunctional fuel valve for a vehicle in which the number of parts is improved, the number of parts is reduced, and the fear of leakage of boil-off gas is greatly reduced.

1 is a block diagram of a vehicle fuel apparatus according to the prior art,

2 is a state diagram of installing various components of a vehicle fuel tank according to the prior art;

3 is a view showing a structure of a cutoff valve according to the prior art,

4 is a view showing the structure of a vent valve according to the prior art,

5 is a view showing a multifunctional fuel valve for a vehicle according to the present invention;

6 and 7 are exploded perspective views of the multi-function fuel valve for a vehicle of FIG.

8 is an exploded perspective view showing a one-way valve means of the multifunction fuel valve for a vehicle;

9 is a view showing an upper side of a valve body in which the one-way valve means is installed;

10 is a perspective view showing a cover of the multifunction fuel valve for a vehicle;

11 is a view illustrating a state in which the multifunctional fuel valve for a vehicle is installed in a fuel tank;

12 to 15 are views illustrating the operation of the multifunction fuel valve for a vehicle.

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

One; Connector 3; cover

3-1; Depression valve portion 5; Valve body

5-1; Gas passage 5-2; Housewife

5-2-1; Limit plate mounting hole 5-2-2; Guide mounting hole

9; Knit guide 11; Knit

13; Valve spool 15; ball

17; Limited edition 19; Valve plate

20; Automotive multifunctional fuel valve 100; Fuel tank

108; Fuel check valve combined two-way valve

116; Canister

A multifunctional fuel valve for a vehicle according to the present invention for achieving the above object includes a cover having a connector for securing a liquid separation space of the boil-off gas and connected to the canister;

A valve body installed while sealing the lower side of the cover;

Vent valve means installed through the valve body so as to communicate with the inside of the cover;

A fuel check valve combined two-way valve installed through the valve body so as to communicate with the inside of the cover;

Characterized in that it consists of a one-way valve means installed through the valve body to communicate with the inside of the cover.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the same parts as used in the description of the prior art will be described using the same names and symbols.

5 to 10 illustrate a multi-functional fuel valve for a vehicle according to the present invention, a cover 3 having a connector 1 connected to a canister and securing a liquid separation space of the boil-off gas, and the cover 3. A valve body 5 installed while sealing the lower side of the valve body, a vent valve means installed through the valve body 5 so as to communicate with the inside of the cover 3, and a communication with the inside of the cover 3; It consists of a fuel check valve combined two-way valve 108 installed through the valve body 5, and a one-way valve means installed through the valve body 5 so as to communicate with the inside of the cover (3) A valve arrangement is shown that can be handled as a single component of.

The vent valve means has a gas passage (5-1) formed to protrude downward in the valve body (5), a float guide (9) coupled to the gas passage lower side of the valve body, and the float guide (9) A float 11 to be built up and lifted in a vertical direction by buoyancy of fuel, a valve spool 13 formed to close the gas passage 5-1 by pushing the float 11 upwards, and A ball 15 built into the cover 3 on the upper side of the valve body 5 to lower the valve spool 13 by its own weight, and a restriction plate 17 provided to limit the lowering of the valve spool 13. It consists of

The float guide 9 is formed with a plurality of holes (9-1) that can be freely in and out of the fuel, so that the fuel injection state in the fuel tank can be immediately reflected in the float 11, A circumferential portion 5-2 protrudes outward from the gas passage 5-1 so that the upper side of the float guide 9 can be fitted to the lower side of the valve body 5.

In the circumferential portion 5-2, a limiting plate mounting hole 5-2-1 formed to allow the limiting plate 17 to be installed and a guide mounting hole 5 formed to allow the float guide 9 to be installed. -2-2), the restriction plate mounting hole (5-2-1) and the guide installation hole (5-2-2) is the gas passage (5-1) the evaporated gas in the fuel tank 100 It also serves as a passageway that can be supplied.

Further, on the upper side of the cover 3, a depression valve portion 3-1 is formed so that the ball 15 is guided by its own weight to block the connector 1 when the vehicle is overturned (see Fig. 10). ).

On the other hand, the fuel check valve combined two-way valve is installed in the valve body (5) so that the vent valve means is positioned higher than the oil level of the fuel capable of detecting the full state of the fuel, the structure of the conventional fuel check valve It has the same structure as the two-way valve 108 is to be integrally installed on the valve body (5).

The one-way valve means has a plurality of one-way holes 5-3 formed through the valve body 5 and adjacent to the one-way holes 5-3 as shown in FIGS. 8 and 9. A mounting plate 5-4 formed in the valve body of the valve body and a valve plate 19 that is press-fitted into the mounting hole 5-4 so as to block the one-way hole 5-3 from below by its elastic force. )

Here, four one-way holes 5-3 are symmetrically formed around the mounting holes 5-4 to form a circle, and the valve plate 19 has the mounting holes 5-4 at the center thereof. ) Has a disc shape in which the mounting portion 19-1 to be press-fitted is formed, and the material may be silicon rubber or the like.

In addition, two one-way valve means are formed at positions opposite to each other on the valve body 5 so that the liquid fuel accumulated on the upper side of the valve body 5 is not accumulated on either side and is returned to the fuel tank. Made it easy.

11 shows the fuel tank 100 to which the multifunctional fuel valve 20 for the vehicle of the present invention configured as described above is applied, all of the conventional complicated valves and hoses are removed, and the multifunctional fuel valve 20 of the present invention is removed. ) Is only installed on the upper side of the fuel tank is connected to the canister 116.

Hereinafter will be described the operation of the multi-function fuel valve for a vehicle of the present invention described above. However, the fuel check valve combined two-way valve 108 is omitted because the configuration and operation are the same as those mentioned in the prior art, and will be described based on the action of the vent valve means and the action of the one-way valve means.

12 to 14 illustrate the operation of the vent valve means. First, FIG. 12 illustrates a state in which fuel is not full or fuel supply, whereby the valve spool 13 has its own weight and the ball 15. Since the gas passage (5-1) is opened by the lower limit plate 17 by the weight of the, the evaporated gas generated in the fuel tank 100 is the guide installation hole (5-2) -2) and the restriction plate mounting hole 5-2-1, and the gas passage 5-1 are sequentially sent to the inside of the cover 3.

The boil-off gas sent to the inside of the cover 3 is separated into a liquid phase and a gaseous phase in a space formed by the cover 3 and the valve body 5 so that the vaporized gas in the gas phase is connected to the canister 116 through the connector 1. And the remaining liquid fuel is returned to the fuel tank 100 through the one-way valve means.

At this time, of course, the fuel check valve combined use two-way valve 108 controls the pressure in the fuel tank 100, and the boil-off gas in the fuel tank 100 is supplied to the space between the cover 3 and the valve body 5. After the separation of the liquid phase and the gaseous phase, the vaporized gaseous gas is sent to the canister 116 through the connector 1 and the liquid fuel is returned to the fuel tank 100 through the one-way valve means. Do it together.

FIG. 13 illustrates a state in which the fuel is full, and as the fuel is refueled, the float 11 rises with the oil level of the fuel to push up the valve spool 13, and the valve spool 13 is the ball. (15) is pushed and ascended to block the lower end of the gas passage (5-1).

Therefore, the boil-off gas in the fuel tank 100 cannot be sent to the canister 116 through the vent valve means so that the pressure in the fuel tank is suddenly increased, and this pressure change is sensed by the lubricator to automatically shut off the oil supply. Will be done.

Of course, even in such a case, the fuel check valve combined two-way valve 108 is installed at a position higher than the oil level of the fuel filled in the full state, and thus the canister 116 continuously controls the pressure inside the fuel tank. ), But not enough to relieve the pressure change that the lubricator can detect.

FIG. 14 illustrates a case where the vehicle is overturned or when the parking state is extremely poor. The ball 15 is led to the recessed valve part 3-1 by its own weight to block the connector 1. Done. At the same time, the valve spool 13 is also lowered by its own weight to shut off the gas passage 5-1, so that unlike the prior art, the double safety shut-off function is realized so that the fuel leakage to the outside of the fuel tank 100 is completely prevented. Can be blocked.

FIG. 15 illustrates the operation of the one-way valve means. In the upper side, liquid fuel is not generated in the space formed by the cover 3 and the valve body 5, the valve plate 19 is one-way. Since the lower side of the hole 5-3 is blocked, both the liquid phase and the gaseous phase of the fuel cannot pass through the one-way hole 5-3 from the fuel tank 100 at all times.

The lower side shows the case where the liquid fuel is generated above the valve body 5, and the evaporated gas introduced into the cover 3 through the fuel check valve combined two-way valve 108 and the vent valve means. When the liquid is liquefied and the weight is greater than or equal to a predetermined level, the one-way hole 5-3 is opened while being deformed and the valve plate 19 is recovered to the fuel tank 100.

Accordingly, as described above, the multi-function fuel valve 20 for a vehicle of the present invention performs all the functions of the conventional fuel check valve combined two-way valve, vent valve, one-way valve, and separator in a single component, and thus, FIG. As shown, the installation structure can be simplified, the hose connection can be reduced, the external leakage of the fuel is extremely limited, and the assembly workability can be greatly improved.

According to the present invention as described above, by providing a multi-function fuel valve for a vehicle that can perform all the functions such as fuel check valve combined two-way valve, vent valve, one-way valve and separator in a single component, improving assembly workability In addition, the effect of reducing the number of parts is generated, and the fear of leakage of boil-off gas is greatly reduced.

Claims (6)

A cover having a connector for securing a liquid phase separation space of the boil-off gas and connected to the canister; A valve body installed while sealing the lower side of the cover; Vent valve means installed through the valve body so as to communicate with the inside of the cover; A fuel check valve combined two-way valve installed through the valve body so as to communicate with the inside of the cover; One-way valve means installed through the valve body so as to communicate with the inside of the cover; Multifunctional fuel valve for a vehicle, characterized in that consisting of. According to claim 1, wherein the vent valve means A gas passage formed protruding downward from the valve body; A float guide coupled to a lower side of the gas passage of the valve body; A float formed in the float guide to rise and fall in a vertical direction by buoyancy of the fuel; A valve spool formed to close the gas passage by pushing the float upward; A ball embedded in a cover above the valve body to lower the valve spool by its own weight; A limiting plate installed to limit the lowering of the valve spool; Multifunctional fuel valve for a vehicle, characterized in that consisting of. The method of claim 2, The upper side of the cover is a multi-function fuel valve for a vehicle, characterized in that it further comprises a depression valve formed to block the connector by the ball is guided by its own weight when the vehicle is overturned. The method of claim 1, The fuel check valve combined two-way valve is a multi-function fuel valve for a vehicle, characterized in that the vent valve means is installed in the valve body higher than the oil level of the fuel to detect the full state of the fuel. The method of claim 1, wherein the one-way valve means A one-way hole formed through the valve body; A mounting hole formed in the valve body at a position adjacent to the one-way hole; A valve plate press-fitted into the mounting hole so as to block the one-way hole from below by its elastic force; Multifunctional fuel valve for a vehicle, characterized in that consisting of. The method of claim 5, The one-way valve means is a multi-function fuel valve for a vehicle, characterized in that a plurality is formed in a position opposite to each other on the valve body.