JP7208582B2 - filler neck - Google Patents

Description

The present invention relates to a filler neck of a tank for storing liquid.

A vehicle such as an automobile has a tank that stores fuel. Further, some vehicles have a separate tank for storing additives such as urea water. Connected to such tanks is a filler neck into which a nozzle is inserted to inject liquid into the tank.

JP 2017-210033 A JP 2016-55834 A JP 2010-195062 A

The structure of a conventional filler neck will be described with reference to FIG. 4, and its problems will be described. In FIG. 4, solid line arrows indicate the flow of liquid, and dotted line arrows indicate the flow of gas such as air and evaporated liquid.

As shown in FIG. 4 , a filler pipe 41 for supplying liquid to the tank 10 is connected to the tank 10 for storing liquid such as fuel, between the filler neck 40 and the gas inside the tank 10 . A breather pipe 42 for discharging is connected. The filler neck 40 has a cylindrical guide 43 that regulates the insertion position of the nozzle 20 when the nozzle 20 for injecting liquid is inserted, and the filler pipe 41 is connected to the lower opening of the guide 43, A breather pipe 42 is connected to the side surface of the guide 43 . When the tank 10 stores an additive such as urea water and the nozzle 20 is for supplying it, the guide 43 is provided with a magnet 44 for identification.

A sensor 21 is provided at the tip of the nozzle 20 to detect that the tank 10 is full of liquid. When the liquid in the tank 10 becomes full, the level of the liquid in the filler pipe 41 rises to the position of the sensor 21, the sensor 21 detects the raised liquid, and the injection of the liquid from the nozzle 20 is stopped. become.

In the filler neck 40 having the structure described above, gas remains in the filler tube 41 at the initial stage of liquid injection. There is a risk that the liquid will stay around the tip of the nozzle 20 , and as a result, the sensor 21 will detect the liquid and stop the injection of the liquid from the nozzle 20 .

In addition, at the final stage of liquid injection, the liquid is also discharged from the breather pipe 42 discharging the gas in the tank 10, but the sensor 21 detects the liquid in the gas-liquid mixed state, and the liquid from the nozzle 20 is discharged. There is a risk of stopping the injection. That is, before the liquid in the filler pipe 41 is detected, that is, before the liquid in the tank 10 becomes full, the injection of the liquid from the nozzle 20 may be stopped. Furthermore, the gas-liquid mixed liquid discharged from the breather pipe 42 may flow along the outer periphery of the nozzle 20 and be discharged as a splash to the inside and outside of the vehicle, blown back, or spilled.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filler neck that stabilizes the flow of liquid in the initial stage of injection and prevents splashing of liquid in the final stage of injection.

A filler neck according to a first invention for solving the above problems is
In the filler neck that supplies the liquid injected from the nozzle to the tank,
a cylindrical guide that regulates the insertion position of the nozzle;
a chamber forming a space outside the perimeter of the guide;
a filler pipe connecting the bottom opening of the guide and the tank and supplying the liquid to the tank;
A breather pipe that connects the side surface of the chamber and the tank and discharges gas in the tank;
a first communicating portion provided at the bottom of the chamber below the tip of the nozzle and communicating the space formed by the chamber and the guide with the filler pipe;
a second communication portion provided on the side surface of the guide at a position higher than the breather pipe connected to the side surface of the chamber and communicating the space formed by the chamber and the guide with the inside of the guide;
characterized by having

A filler neck according to a second invention for solving the above problems is
In the filler neck according to the first invention,
It is provided on the outer peripheral surface of the guide at a position higher than the breather pipe connected to the side surface of the chamber and lower than the second communication portion, and divides the space between the chamber and the guide into upper and lower parts. at least one collar;
a third communicating portion provided in the collar portion for communicating the vertically divided spaces;
characterized by having

A filler neck according to a third invention for solving the above problems is
In the filler neck according to the first or second invention,
The first communicating portion is arranged at a circumferential position separated by 90 degrees or more from a circumferential position of the breather pipe connected to the side surface of the chamber.

A filler neck according to a fourth invention for solving the above problems is
In the filler neck according to any one of the first to third inventions,
The guide is characterized by having a structure for holding a magnet.

According to the present invention, it is possible to provide a filler neck that stabilizes the flow of the liquid in the initial stage of injection and prevents the liquid from splashing, blowing back, spilling, etc. at the final stage of injection.

FIG. 4 is a cross-sectional view illustrating the structure of a filler neck according to the present invention and the flow of liquid and gas at the initial stage of injection; FIG. 2 is a diagram for explaining the flow of liquid and gas at the final stage of injection in the cross-sectional view shown in FIG. 1; FIG. 3 is a cross-sectional view of the filler neck shown in FIGS. 1 and 2 taken along the line AA. FIG. 3 is a cross-sectional view illustrating the structure of a conventional filler neck;

An embodiment of a filler neck according to the present invention will be described with reference to the drawings.

[Example 1]
1 and 2 are cross-sectional views illustrating the structure of the filler neck of this embodiment. FIG. 1 illustrates the flow of liquid and gas at the beginning of injection, and FIG. 2 illustrates the final stage of injection. describes the flow of liquids and gases in 3 is a cross-sectional view of the filler neck shown in FIGS. 1 and 2 taken along the line AA. In FIGS. 1 and 2, solid line arrows indicate the flow of liquid, and dotted line arrows indicate the flow of gas such as air or evaporated liquid. Also, the same reference numerals are given to the same components as those of the configuration described in FIG. 4 .

The filler neck 30 of this embodiment supplies liquid such as fuel injected from the nozzle 20 to the tank 10 . Similar to the filler neck 40 shown in FIG. 4, the filler neck 30 is connected to the tank 10 that stores the liquid, and the filler pipe 31 that supplies the liquid to the tank 10 and the gas inside the tank 10 are discharged. It is connected to the tank 10 via a breather pipe 32 . Inside the tank 10, the tip of the breather pipe 32 is arranged so as to be at the level of the liquid when the tank 10 is filled with liquid.

Similar to the filler neck 40 shown in FIG. 4, the filler neck 30 has a tubular guide 33 that regulates the insertion position of the nozzle 20 for injecting liquid when the nozzle 20 is inserted. However, unlike the filler neck 40 shown in FIG. 4, the filler neck 30 has a chamber 35 forming a space outside the outer periphery of the guide 33 to block the outer periphery of the guide 33 . The chamber 35 is arranged so as to cover the outer peripheral surface of the guide 33, and the lower outer peripheral side of the guide 33 is also covered with the chamber bottom portion 35a. Spaces (spaces S1 and S2) are thus formed between the guide 33 and the chamber 35 .

A filler pipe 31 is connected between the lower opening of the guide 33 and the tank 10, similarly to the filler neck 40 shown in FIG. However, unlike the filler neck 40 shown in FIG. 4, the breather tube 32 is connected between the side of the chamber 35 and the tank 10 rather than between the side of the guide 33 and the tank 10 . At least one (one example in FIG. 3) communicating groove 36 (first communicating portion) is formed in the chamber bottom portion 35a to communicate the space S1 with the filler tube 31. As shown in FIG. The communication groove 36 is desirably arranged at a circumferential position distant from the circumferential position of the breather pipe 32 connected to the side surface of the chamber 35, at least at a circumferential position distant from the circumferential position of the breather pipe 32 by 90 degrees or more. Any directional position is acceptable, and most preferably a circumferential position 180 degrees away from the circumferential position of the breather pipe 32 , that is, a circumferential position opposite to the circumferential position of the breather pipe 32 .

A collar portion 37 is provided around the entire circumference of the outer peripheral surface of the guide 33 to vertically divide the space between the guide 33 and the chamber 35 into a space S1 and a space S2. The flange 37 serves as a reinforcement for the guide 33 and also as a support for the guide 33 during installation. Also, the collar portion 37 is arranged at a position higher than the breather pipe 32 connected to the side surface of the chamber 35 and lower than a communication hole 39 to be described later.

The collar portion 37 is provided with at least one (in FIG. 3, two as an example) notch portion 38 (third communicating portion), and the notch portion 38 extends in the circumferential direction of the communicating groove 36 described above. It is arranged at a circumferential position different from the position. The notch 38 communicates the vertically divided space S1 and space S2.

A plurality of flanges 37 may be provided as long as they are positioned higher than the breather pipe 32 and lower than the communication hole 39 to be described later. In that case, the flanges 37 are arranged so that their notches 38 are located at different circumferential positions.

At least one (two in FIG. 3 as an example) communication holes 39 (second communication portions) are formed in the side surface of the guide 33 to communicate the space S2 and the inside of the guide 33 . The communication hole 39 is arranged at a position higher than the breather pipe 32 and the collar portion 37 . Also, the communication hole 39 is arranged at a circumferential position closest to the circumferential position where the notch 38 is arranged.

In addition, when a plurality of communication holes 39 are provided, the communication hole 39 located at a circumferential position away from the breather pipe 32 in the circumferential direction is replaced by another communication hole 39 located at a circumferential position close to the breather pipe 32 in the circumferential direction. Form lower or deeper. In the communication hole 39 formed in this manner, the gas or liquid that has flowed into the vicinity thereof easily flows inside the guide 33 from the space S2.

Further, when the tank 10 stores an additive such as urea water and the nozzle 20 is for supplying the additive, the guide 33 is provided with a magnet 34 for identification. For example, a structure for holding the magnet 34 may be provided using the collar portion 37 .

Here, regarding the filler neck 30 having the structure described above, the flow of liquid and the flow of gas at the initial stage of liquid injection will be described with reference to FIGS. 1 and 3. FIG.

At the initial stage of liquid injection, when the liquid is injected from the nozzle 20 inserted inside the guide 33, the gas remaining in the filler tube 31 passes through the communication groove 36 and flows from the filler tube 31 to the space S1. , then flows from the space S1 to the space S2 through the notch 38, and flows from the space S2 to the inside of the guide 33 through the communication hole 39. In other words, a path for removing air remaining in the filler tube 31 is formed. Therefore, even at the initial stage of liquid injection, the flow of liquid flowing through the filler tube 31 is stabilized, and the initial stage of liquid injection can be stabilized. Therefore, the injected liquid will not stay around the tip of the nozzle 20, the sensor 21 will not detect the liquid, and the injection of the liquid from the nozzle 20 will not stop.

Next, regarding the filler neck 30 having the structure described above, the flow of liquid and the flow of gas at the final stage of liquid injection will be described with reference to FIGS. 2 and 3. FIG.

At the final stage of liquid injection, the liquid is also discharged from the breather pipe 32 together with the gas, and these flow into the space S1. When the amount of liquid that has flowed into the space S1 is small, it flows through the communication groove 36 from the space S1 to the filler pipe 31 and returns to the filler pipe 31, so that the liquid is discharged inside and outside the vehicle as splashes. no more splattering, blowing back, or spilling.

When the liquid in the tank 10 becomes full, a large amount of liquid flows into the space S1, and a part of the liquid that has flowed into the space S1 flows from the space S1 to the filler pipe 31 through the communication groove 36. However, the other liquid flows from the space S1 to the space S2 through the notch 38, passes through the communication hole 39, and flows from the space S2 to the inside of the guide 33. The liquid that has flowed inside the guide 33 flows toward the tip of the nozzle 20 , and the liquid is detected by the sensor 21 to stop the injection of the liquid from the nozzle 20 . In other words, the sensor 21 detects not the gas-liquid mixed liquid discharged from the breather pipe 32, but the liquid discharged from the breather pipe 32. That is, when the liquid level in the tank 10 becomes full, the liquid is detected and injection is stopped.

As described above, the filler neck 30 of this embodiment can stabilize the liquid at the initial stage of injection. In addition, it is possible to prevent splashing, blowing back, spilling, etc. of the liquid at the final stage of injection, prevent contamination of the interior and exterior of the vehicle, and detect the liquid at a higher liquid level than before, and stop injection. .

1 to 3, the chamber 35, the communication groove 36, the flange 37, the notch 38, and the communication hole 39 are provided around the guide 33, so that the filler neck 30 is compact. It can be a structure provided in

The filler neck according to the present invention is suitable for liquid tanks such as fuel and urea water.

10 Tank 20 Nozzle 21 Sensor 30 Filler Neck 31 Filler Pipe 32 Breather Pipe 33 Guide 34 Magnet 35 Chamber 36 Communication Groove 37 Flange 38 Notch 39 Communication Hole

Claims (4)

In the filler neck that supplies the liquid injected from the nozzle to the tank,
a cylindrical guide that regulates the insertion position of the nozzle;
a chamber forming a space outside the perimeter of the guide;
a filler pipe connecting the bottom opening of the guide and the tank and supplying the liquid to the tank;
A breather pipe that connects the side surface of the chamber and the tank and discharges gas in the tank;
a first communicating portion provided at the bottom of the chamber below the tip of the nozzle and communicating the space formed by the chamber and the guide with the filler pipe;
a second communication portion provided on the side surface of the guide at a position higher than the breather pipe connected to the side surface of the chamber and communicating the space formed by the chamber and the guide with the inside of the guide;
A filler neck comprising: The filler neck of claim 1,
It is provided on the outer peripheral surface of the guide at a position higher than the breather pipe connected to the side surface of the chamber and lower than the second communication portion, and divides the space between the chamber and the guide into upper and lower parts. at least one collar;
a third communicating portion provided in the collar portion for communicating the vertically divided spaces;
A filler neck comprising: In the filler neck according to claim 1 or claim 2,
A filler neck, wherein the first communicating portion is arranged at a circumferential position separated by 90 degrees or more from a circumferential position of the breather pipe connected to the side surface of the chamber. In the filler neck according to any one of claims 1 to 3,
A filler neck, wherein the guide has a structure for holding a magnet.

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