DE3342871C2 - Container system for liquids, in particular tank system for motor vehicles - Google Patents

Abstract

A container system for liquids, in particular a tank system for motor vehicles, is proposed which has at least two laterally spaced apart liquid containers that communicate with one another in the lower area via an overflow line on the one hand and through a ventilation line spaced from the upper container walls on the other are connected to one another, which is located inside the liquid container, has upwardly guided line sections ending in the region of the upper container walls. One of the liquid containers is equipped with a removable container closure, which preferably provides for ventilation at the same time. A float valve is assigned to each open end of the line sections led upwards in the liquid containers, which closes the line section tightly after reaching a predetermined filling level or when sloshing liquid threatens to run into the line section. The float valves thus keep the vent lines free of liquid and ensure constant level compensation in the liquid containers.

Description

The invention relates to a container system for liquids, in particular a tank system for motor vehicles, with the features listed in the preamble of the claim.

A tank system of this type for motor vehicles is already known (DE patent 32 24 943).

In order to ensure constant level compensation in the liquid containers of this container system, requires the leveling device a construction that, on the one hand, a constant ventilation of the without Container closure equipped liquid container ensures and in the case of the open at the top Ends of the ventilation line penetrating liquid is withdrawn from this again. To this Purpose, a suction lifter is connected to the ventilation line and the seal-free liquid container equipped with a ventilation valve.

The invention is based on the object for container systems as explained in the preamble of the claim Kind of specifying a leveling device that ensures that in the open ends of the upward No liquid can penetrate into the duct sections of the ventilation line and thus through Liquid the community between the liquid containers cannot be canceled.

According to the invention, this object is achieved by the characterizing claim features.

The arrangement of the open ends of the ventilation line in a space that is only is connected to the inside of the container via an opening opposite the float, ensures that under the influence of a level rising above a maximum permissible level in the liquid containers when refueling Liquid or in the case of sloshing liquid or liquid displaced due to lateral acceleration the open pipe ends are closed by the valve member before the liquid reaches them, in the liquid flowing into the room hits the float and this in addition to. η buoyancy relocated accordingly to control the valve member in its closed position

This means that the ventilation line is always kept free of liquid, which has the advantage of on this without suction cup and on the non-locking liquid

! 5 fluid container without the arrangement of a ventilation valve get along.

The space inside the container that accommodates the lever arrangement together with the valve member and float can in the area of the upper container wall or on this itself or external to the container interior, namely on the upper container wall can be provided as an attachable valve module.

The container system according to the invention is suitable for liquids of any kind in vehicles and work equipment.

There is already a container ventilation valve in a container system ;;! known that can be connected to both the upper container wall of a liquid container as well as can be connected to a vent line laid outside the liquid container (DE-OS 23 09 498).

This vent valve has a float located inside the liquid container, with the help of which a valve opening serving to ventilate and ventilate the container can be closed, provided that a maximum Filling level is exceeded. For this purpose, the float itself forms a spherical, valve member guided vertically movably in a cage. This vent valve would not be functional, provided its valve member of sloshing or displaced liquid transversely to it when buoyant executive closing movement would be applied, because in this case the valve member by itself between this and the valve opening forcing liquid is initially prevented from moving into its closed position were.

An exemplary embodiment is shown schematically in the drawing shown on a container system according to the invention. It shows:

F i g. 1 a longitudinal section through the container system,

2 shows a section indicated in FIG. 1 by a dash-dotted circle, on a larger scale than FIG. 1.
The container system 10 shown in Fig. 1 forms, for example, a fuel supply system for a motor vehicle which, for. B. comprises a total of four fuel tanks 12a-12c / connected in series, which are installed essentially in the same plane and also have the same height. Like F i g. 1 shows, their capacity can be different.

Adjacent fuel tanks are each in their lower area by means of an overflow line 14 connected to one another, which are preferably aligned with one another. 16 denotes one through all of the fuel tanks Compensating line, known per se, carried out 12 hours.

To fill all fuel tanks, only the fuel tank 12a is equipped with a filler neck 18.

permitted, with a cap which simultaneously allows ventilation of all fuel tanks 12a-12c / 20 is equipped

To ensure that in the interior of all fuel tanks 12a-12c / when removing fuel A constant level equalization takes place via a suction nozzle 22, the interiors communicate with one another Adjacent fuel tanks to each other via a ventilation line 24 each.

For certain structural reasons, these are to be laid below the maximum filling level, whereby they in the present case are installed directly above the respective overflow pipe 14.

This arrangement of the ventilation lines 24 makes it necessary to move them up to the vicinity of the upper container wall 26 to guide. The ventilation lines 24 are preferably U-shaped, wherein the U-legs open at the top line sections 28 and form 30.

The open end of each line section 28 and 30 is a float valve designated as a whole by 32 assigned, which upon reaching a level of qualification the fuel tank 12a— 12t /, in which the danger the running of fuel into the line sections 28 and 30 or the same risk in The opening of the relevant line section 28 or 30 is buried in the sloshing of the fuel automatically seals tightly

For this purpose, the float valve 32 is provided on the upper container wall 26, housed upwardly tight space 34, through the space floor 36 of the relevant line section 28 or 30 is passed through and held therein that its open end at a distance a from Room floor 36 is located.

The opening of the line sections 28 and 30 is above the same, for example, a cover-shaped, for example, made of suitable rubber valve member 38 assigned to a lever arm 40 e'.nes double-armed lever 42 is suspended pivotably, the other lever arm 44 one Swimmer 46 wears.

The double-armed lever 42 is pivotably mounted about a stationary horizontal axis 48, a stop 50 holding it in an initial position in which the float 46 is located at a disgustingly sufficient distance b above the floor and at a lateral distance from the open end of the line section 30.

In the floor 36 of the room 34 is, for example the Opposite float 46, one through a connecting post formed inflow opening 52 provided for the fuel.

The float valve 32 could also be accommodated in a separate housing and this on the upper one Container wall 26 be installed.

In this case, the line section 30 would have to go through the upper container wall 26 passed through and in this the connecting piece can also be arranged.

If the fuel tanks 12a-12c / are filled via the filler neck 18, the space of the tank 12a is first filled up to below the equalization line 16 or overflow line 14. The fuel then reaches the fuel tank Ub- 12c / via the overflow line 14 and equalization line 16. .

The gas volume, which is reduced by the inflowing fuel volume, flows out nor over the overflow lines 14, the ventilation lines 24 and the filler neck 18. The Float valves 32 are open

If the fuel level has reached the upper edge of the overflow lines 14, the ventilation takes place exclusively via the ventilation lines 24 and the filler neck 18. The fuel level of all fuel tanks From a quasi-static perspective, continue to rise together at the same time. Dynamically result however, there are differences in the fuel columns depending on the filling capacity or the line resistance the overflow lines 14 or compensating line 16 and the ventilation lines 24.

If a fuel level reaches an inflow opening 52 of the connecting piece of an inner space 34, so the liquid penetrates into this space 34. The fuel jet hits the float below 46 on. If the flow pressure is sufficient, the torque generated by this exceeds the static torque Mass moment of the float 46 and forms a counterforce that the valve member 38 on the open front end of the line section 28 or 30 presses the valve closing pressure is further increased by the buoyancy of the float 46. In this state, no Penetrate liquid into the ventilation line 24; their function is thus ensured

The container arrangement is fully or partially below it filled state an inclined position or lateral acceleration, the fuel tries to get into the one below or external fuel tank to flow. Now reaches a column of liquid via the connecting piece a float 46, the float valve 32 begins to close. This ensures that the ventilation lines 24 always remain free of fuel and a constant level compensation in all fuel tanks 12a-12c / can.

The arrangement of the float valves 32 in each case one from the inside of the container only via the connecting piece accessible space 34 ensures a reliable function of the float valves 32, since the Float 46 is acted upon in a targeted manner, with liquid which has penetrated into a space 34 in the normal position the container via the opening 52 of the connecting piece 52 ending in the floor 36 of the space 34 as well will flow out again.

The float valve arrangement shown is therefore a particularly advantageous construction.

1 sheet of drawings

Claims (1)

Claim: Container system for liquids, in particular tank system for motor vehicles, with at least two liquid containers arranged at a distance from one another and having approximately the same height, which on the one hand communicate with each other in the lower area via an overflow line and on the other hand, they are connected to one another by a ventilation line which is arranged at a distance from the upper container walls and which leads to the top has pipe sections that are guided and end in the area of the upper container walls in the interior of the container, with a container closure detachably arranged on a liquid container with a Ventilation device and with an automatic one assigned to the ventilation line Device for the purpose of constant level adjustment in the liquid containers, characterized in that db upwards guided line sections (28; 30) of the ventilation line (24) each one upwards tightly closed space (34) are connected, the open end at a distance from The room floor (36) is located in the room (34) with a lever arrangement which can be actuated by a float (46) for controlling a valve member assigned to the open end of the line section (28; 30) (38) is arranged and that the space (34) with the interior of the container by an in particular in Room floor (36) arranged and opposite the float (46). Each opening (52) is connected.