JP3238173B2 - Safety device for fueling tanks in motor vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention simultaneously performs a function of preventing overflow and a function of ventilation during use, and at the same time, prevents the discharge of fuel in the event of an accident during use or when a vehicle is inclined. The present invention relates to a safety device for a device for supplying fuel to a tank of an automobile.

[0002]

2. Description of the Related Art Today,
Motor vehicle fuel tanks are equipped with a set of pipes and equipment that fulfill separate functions, in particular, a function to prevent overflow and a function to vent during use to allow air to flow in and escape excess fuel vapors. There must be. In addition, the equipment used for these purposes guarantees complete safety, and in particular prevents fuel emissions not only during normal use, but also in accidents involving steep or tilting vehicles. Or it is essential to minimize it.

To achieve such a result, it is generally necessary to rely on a set of separate specialized devices. Thus, European Patent Application No. 0 33 549 discloses a device for venting the tank and preventing the tank from overflowing, which involves, on the one hand, the use of a vent pipe closing valve and, on the other hand, an over-tilted valve. In some cases, this involves the use of independent safety valves for ventilation and protection.

[0004] A single device has now been developed that performs the various functions necessary to ensure the correct operation and complete safety of the device that fuels the tanks of motor vehicles.

[0005]

Accordingly, the present invention fulfills the function of preventing overflow and the function of ventilation during use.
In particular, it relates to a safety device for a device for supplying fuel to a tank of a motor vehicle, which prevents the discharge of fuel in the event of an accident, an inlet provided on a lower wall and connected to a high portion of the tank by a pipe, And wherein the two ports are arranged on a single vertical axis, wherein the closed chamber is filled with a tank. It is characterized in that it has a first control device capable of closing the inflow port and a second control device capable of closing the outflow port when the vehicle is tilted excessively.

According to a preferred embodiment, the first control device comprises a lever pivoted about a spindle arranged in a closed chamber, the control rod being stressed by the tank closing device being connected to one end of the lever. One end of the lever includes a compression spring that holds the control rod in the raised position, and the other end of the lever supports a ball aligned with the inlet by a suitable circular opening, and a second control The device is arranged, on the one hand, in a closed chamber aligned with the inlet and with a tapered contoured seat capable of receiving a ball, on the other hand, in the closed chamber and sealing the outlet. The valve needle has an attachment for trapping the ball.

[0007] In the device according to the invention, the attachment for enclosing the ball is preferably of rectangular cross section, the base of which is smaller in diameter than the diameter of the ball and is arranged in alignment with the inlet and accommodates the ball. With a circular opening designed to. A cutout provided on the side wall of the attachment allows the pivoting lever to pass through. In general, a lever arm having a circular opening is located above the base of the attachment, and the circular opening provided in the lever arm is such that when the lever arm and the attachment are in the lowered position, the wall of the ball is in this opening. And at the same time contact the edge of the circular opening provided in the attachment.

Preferably, the diameter of the ball and the height of the attachment are dimensioned such that the top of the ball contacts the upper wall of the attachment when the lever arm supporting the ball is in the raised position and when the attachment is in the lowered position. It is decided.

[0009]

In the device according to the present invention, when the tank is full, the removal of the sealing device or other mechanism releases the pressure exerted on the control rod and the lever is rotated by the action of the compression spring, As a result, the ball rests on the inlet by gravity and seals it. The seal is maintained as long as the pressure in the pipe connected to the inlet is not sufficient to raise the ball. Thus, in general, the weight of the metal ball should be selected to be sufficient to prevent overflow of the tank.

When the sealing device or other mechanism is replaced after filling the tank, pressure is reapplied on the control rod and the lever pivots in the opposite direction, compressing the compression spring and consequently the ball. Rises away from the inlet and contacts the upper wall of the attachment. Thus, during normal use of the vehicle, the inlet and outlet are open, air can enter the tank and fuel vapors can escape.

On the other hand, if the vehicle is tilted excessively, the ball will move by gravity along the valve seat provided in line with the inlet, pushing up the attachment and consequently the flow through the valve needle. Seal the outlet. In the device according to the invention, it is also possible to dimension the circular openings in the base and lever of the attachment so that the ball can be settled, thus avoiding an inadvertent sealing of the outlet.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS The safety device according to the invention will be further elucidated in the description of the preferred embodiment. In this description, reference is made to the single FIGURE of the accompanying drawing which shows a cross-section of a safety device according to the invention. As FIG. 1 shows, the safety device has a closed chamber 26 made of metal or plastic material, which is connected to its lower wall by pipes (not shown) to the high part of the tank. And the neck 2 has an outlet 14 connected to a vent pipe (not shown) with a collection vessel, these two ports being located on a single vertical axis.

The closed chamber 26 further has a first control device 2 therein capable of sealing the inflow port 15 during filling of the tank.
7 and, in particular, when the vehicle is tilted excessively,
And a second control device 28 that can seal the fourth control device 4. The first control device 27 has a lever 8 that rotates around the spindle 11, and a control rod 9 to which stress is applied by the tank sealing device 1 hits one end of the lever 8, and one end of the lever connects the control rod 9. Compression spring 1 held in raised position
0, and the other end of the lever supports the metal ball 7 aligned with the inflow port 15 by the circular opening 13.

The second control device 28 is arranged, on the one hand, in the closed chamber 26 in alignment with the inlet and by a tapered valve seat capable of receiving a ball, on the other hand, in the closed chamber. The valve needle 4 is provided with an attachment 5 for closing the ball 7. The attachment 5 has a rectangular cross section, and its base is
It has a circular opening 6 adapted to receive a ball 7.

The operation of the above-described device is as follows. When the vehicle is in normal use, the tank sealing device 1
Exerts a pressure on the control rod 9, which is transmitted to the lever 8, and the rotation of the lever 8 raises the ball 7 to move it away from the outlet 15. As ball 7 rises, ball 7
1 only contacts the upper wall 18 of the attachment 5 which remains in the position shown in FIG.
4 away. Since the inlet and outlet are not obstructed, air can flow into the tank and can escape fuel vapors.

On the other hand, in the event of an accident, if the vehicle becomes too lean, the ball 7 leaves the circular openings 6 and 13 and moves along the valve seat 12, thereby pushing the attachment 5 upward. The outlet is sealed with a valve needle 4. As a result, inadvertent release of fuel is prevented by closing the outlet. During filling of the tank, the removal of the tank sealing device 1 releases the control rod 9 and, by the action of the compression spring 10, rotates the lever 8, so that the ball 7 seals the inlet 15 by gravity, Prevents the tank from overflowing.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a safety device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank sealing device 4 Valve needle 5 Attachment 7 Ball 8 Lever 10 Compression spring 11 Spindle 12 Valve seat 13 Circular opening 14 Outlet 15 Inflow 26 Sealed room 27 First control device 28 Second control device

Continuation of the front page (56) References JP-A-63-79356 (JP, A) JP-A-63-130322 (JP, A) JP-A-63-193180 (JP, A) JP-A-63-192130 (JP, A) , A) Japanese Utility Model Showa 63-150175 (JP, U) Japanese Utility Model Utility Model 4-11248 (JP, U) Japanese Utility Model Utility Model 259021 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB Name) B60K 15/00-15/10 F02M 37/00-37/00 311

Claims (2)

(57) [Claims] 1. A safety device for a device for supplying fuel to an automobile tank, which fulfills a function of preventing overflow and a function of ventilation during use, and in particular, prevents the discharge of fuel in the event of an accident. A closed chamber (26) provided with an inlet (15) provided on the lower wall and connected to a high point of the tank by a pipe, and an outlet (14) provided on the upper wall and connected to a ventilation pipe. ) Wherein the two ports are arranged on a single vertical axis, wherein the closed chamber (26) is capable of sealing the inlet during filling of the tank. (27) and, in particular, a second control device (28) capable of closing the outlet when the vehicle is tilted excessively, and the first control device (27) includes:
A control rod (9) constituted by a lever (8) pivoting about a spindle (11) arranged in a closed chamber (26) and stressed by a tank sealing device (1)
Strikes one end of a lever (8), one end of which comprises a compression spring (10) holding the control rod (9) in an elevated position, the other end of said lever being aligned with the inlet (15). Safety device, characterized in that the arranged balls (7) are supported by suitable circular openings (13). 2. A second control device (28), on the one hand, being arranged in a closed chamber in line with the inlet (15) and having a tapered contour valve seat (1) capable of receiving a ball (7).
2), on the other hand, is constituted by a valve needle (4) arranged in a closed chamber (26) and capable of sealing the outlet (14), said valve needle (4) comprising a ball (7). 2. A safety device according to claim 1, comprising an attachment (5) for enclosing the device.