WO2020020696A2

WO2020020696A2 - Filler neck for unpressurised fueling shut-off and refueling, and working fluid container comprising a filler neck

Info

Publication number: WO2020020696A2
Application number: PCT/EP2019/069077
Authority: WO
Inventors: Ibrahim Koukan; Dimitri GRIGOREV
Original assignee: Kautex Textron Gmbh & Co. Kg
Priority date: 2018-07-27
Filing date: 2019-07-16
Publication date: 2020-01-30
Also published as: DE102018118272A1; WO2020020696A3

Abstract

The invention relates to a filler neck (100) for a working fluid container (200) for a motor vehicle, comprising an insertion opening (101) by means of which a pump nozzle (Z) for filling the working fluid container (200) can be inserted, an outlet opening (141) that can be fluidically connected to said working fluid container (200) for feeding working fluid into a working fluid container interior (201), and a deaerating connection (110) for connecting a deaerating line (210) which is fluidically connected to a working fluid container interior (201), said filler neck (100) being characterised in that it comprises a first sealing device (130) and a receiving space (150) which is positioned downstream of said first sealing device (130) in the filling direction and is designed to receive an outlet end (Z1) of the pump nozzle (Z), wherein said receiving space (150) is sealed off from gas exchange with the atmosphere by means of the first sealing device (130) when the pump nozzle (Z) is inserted into the filling neck (100), and the deaerating connection (110) opens into the receiving space (150). The invention also relates to a working fluid container (200) comprising said filler neck (100).

Description

Filler neck for unpressurized refueling shutdown and night refueling and operating fluid container with filler neck

The invention relates to a filler neck for a motor vehicle operating fluid container, into which a nozzle valve for filling the operating fluid container can be inserted. Furthermore, the present invention relates to an operating fluid container with a filler neck.

The operating fluid container can be a fuel container, a urea container for use in the SCR process (Selective Catalytic Reduction) or another motor vehicle operating fluid container.

When filling motor vehicle operating fluid containers, for example by means of a dispensing valve, operating fluid may leak through the filler neck. In the case of a valve shutdown by means of a sniffer hole / shut-off hole on the nozzle, the pressure surges generated in this way lead to a bubbling and swelling amount of liquid which, depending on the design of the filler neck, can sometimes spurt outwards from the filler neck. Especially when filling with urea, this leads to undesirable external contamination on the filler neck and on the vehicle.

So splash in the so-called "spitback" due to the switching off of the nozzle and the associated wave formation In the filler neck, drops of operating liquid through ventilation openings from the filler neck. In the so-called “splashback”, larger quantities of liquid emerge from ventilation openings of the filler neck due to the switching off of the nozzle and / or due to the impact of the operating liquid emerging from the nozzle on a liquid column during refueling.

On the one hand, the ventilation capacity, i.e. the amount of gas that can be discharged per time unit by ventilation devices is increased from filler neck so that the time for filling the operating fluid container can be reduced, and secondly the spitback and the splashback are to be reduced at the same time. However, these two targets have so far not been fully satisfactory, because the larger the venting capacity of a filler neck, the larger the cross-sectional areas of the venting channels must be, which leads to a higher spitback and splashback of the filler neck.

DE 10 2013 016 684 A1 describes a filler neck for a motor vehicle operating fluid container, the filler neck allowing a ventilation flow that runs parallel and opposite to the refueling volume flow.

The present invention has for its object to provide an improved filler neck that ensures reduced leakage of operating fluid through the filler neck during the filling process and during a refueling process.

The object on which the present invention is based is achieved by a filler neck having the features of claim 1. Advantageous embodiments are described in the claims dependent on claim 1. In more detail, the object on which the present invention is based is achieved by a filler neck for a motor vehicle operating fluid container, which has an insertion opening via which a nozzle valve for filling the operating fluid container can be inserted, an outlet opening which is connected to the operating fluid container for introducing operating fluid an operating fluid container interior is fluid-connectable and has a vent connection for connecting a vent line that is fluidly connected to an operating fluid container interior. The filler neck according to the invention is characterized in that the filler neck has a first sealing device and a receiving space which is arranged downstream of the first sealing device in the filling direction and is formed for receiving a mouth end of the nozzle valve, the receiving space being in the filler neck by means of the first sealing device introduced tap valve is sealed from the atmosphere with respect to a gas exchange cal, and the vent connection opens into the receiving space.

The filler neck according to the invention enables a substantially unpressurized refueling stop without the operating liquid rising in the filler pipe of the operating fluid container in order to come into contact with a sniffer bore of a nozzle, so that the spitback and splashback of the filler neck can be considerably reduced and, if necessary, completely eliminated , At the same time, it is still possible to achieve a sufficiently large ventilation volume flow from the interior of the operating liquid container, so that a refueling process with an undiminished filling volume flow is possible. Furthermore, the filler neck according to the invention enables a sig nificant reduction in an amount of operating fluid which is filled into the operating fluid container during a refueling process. If the operating fluid level has reached a shutdown level or a shutdown fill level, venting of the operating fluid container interior via a venting device, for example, designed as an immersion tube, which is fluidly connected to the venting connection by means of a venting line, is no longer possible. Due to the Venturi effect, there is a suppression within the receiving space of the filler neck. The development of this vacuum is made possible because the first sealing device prevents or at least counteracts a gas exchange between the receiving space and the atmosphere. Due to the negative pressure in the receiving space, in which a mouth end of a dispensing valve is arranged during the filling process, the dispensing valve ends the filling process.

Consequently, the filler neck according to the invention makes it possible for the operating fluid to no longer rise in the filler pipe, or to increase it considerably less when a filling process is ended, so that the spitback and splashback of the filler neck can be considerably reduced and, if necessary, completely eliminated.

The receiving space is gas-separated by the first sealing device with the nozzle plugged into the filler neck from the outside of the filler neck and thus from the atmosphere, so that no gas exchange between the receiving space and the atmosphere is possible.

Since the receiving space is sealed from the atmosphere with respect to gas exchange by means of the first sealing device when the nozzle is inserted into the filler neck, the first sealing device faces the insertion opening of the filler neck. The first sealing device is preferably designed as a circumferential sealing lip, which projects into a nozzle insertion channel of the filler neck. More preferably, the first sealing device is designed as a double sealing lip, which projects into the nozzle insertion channel of the filler neck. Furthermore, it is also possible for the first sealing device to be designed as an O-ring. In this respect, there are no restrictions according to the invention with regard to the configuration of the first sealing device.

The fluid connection between the outlet opening of the filler neck and the operating liquid container interior usually takes place via a filler pipe.

Since the vent connection opens into the receiving space, the vent connection is fluid-connected to the receiving space. The vent connection is preferably designed as a vent connection, which preferably has a fir tree profile on its outside.

The outlet opening of the nozzle is arranged in the mouth end of the nozzle. Furthermore, the nozzle valve has a sniffer bore in the region of the mouth end. Thus, when the nozzle is inserted in the filler neck, the sniffer bore of the nozzle is arranged in the receiving space.

Preferably, the filler neck has a second sealing device facing away from the insertion opening and facing the outlet opening and having an inner diameter narrowing in the direction from the insertion opening to the outlet opening, the receiving space being arranged between the first sealing device and the second sealing device.

The appropriately designed filler neck has a further reduced tendency to spitback and splashback, because of the provision of the second sealing device between the receiving space of the filler neck and the atmosphere results in a greater pressure difference and thus a greater suppression if ventilation of the operating fluid container interior by means of the ventilation device is prevented due to the shutdown level being reached, so that one Ending a filling process, even less operating fluid in the filler pipe rises.

The first sealing device and the second sealing device limit the receiving space. The first sealing device limits the receiving space to the atmosphere and the second sealing device limits the receiving space in the installed state to the operating liquid container interior.

When installed, i.e. if the filler neck is fluidly connected to a fill pipe of the operating liquid for introducing operating liquid into the operating liquid container interior, the receiving space is essentially sealed with respect to a gas exchange by means of the second sealing device when the operating liquid flows through the second sealing device into the operating liquid container interior with respect to a gas exchange, if one Venting of the operating fluid container interior is prevented by means of a venting device (for example an ROV valve) which is closed by the operating fluid level.

The second sealing device is preferably formed in one piece with the filler neck.

Further preferably, the second sealing device can be connected to the filler neck by plugging on and / or clipping.

More preferably, the second sealing device has longitudinal material recesses in the region of its outlet opening. As a result, the outlet opening can have different clear widths as a function of an operating fluid flow through the second sealing device.

The second sealing device in the region of the outlet opening is preferably straight or oblique and / or with a material recess in the form of cutouts.

The filler neck is preferably designed such that the outlet opening of the filler neck increases with increasing operating fluid volume flow.

A corresponding design of the filler neck enables an increased fill volume flow of operating fluid. At the same time, gas exchange through the second sealing device from the operating liquid container interior to the receiving space of the filler neck is again counteracted.

More preferably, the filler neck is designed such that the outlet opening of the filler neck is formed by the second sealing device.

More preferably, the filler neck is designed such that the second sealing device is formed from an elastomer and / or a plastic.

A corresponding design of the filler neck enables an increased fill volume flow of operating fluid. At the same time, gas exchange through the second sealing device from the operating liquid container interior to the receiving space of the filler neck is again counteracted. The terms used above mean that the second sealing device is sufficiently flexible to expand elastically under the influence of the flow energy of the operating fluid flowing through it, increasing the free cross section, or to contract elastically as the amount of operating fluid decreases per unit of time, so as to increase the size to adjust the free cross-section for the passage of the operating fluid to the respective quantity per unit of time, so that the entire cross-section is filled with operating fluid.

More preferably, the filler neck is designed such that the filler neck has a guide device for guiding the nozzle within the filler neck.

The guide device is preferably designed as an insertion funnel.

More preferably, the filler neck is designed such that the first sealing device has a first seal, which is arranged between an inner wall of the filler neck and the guide device and counteracts gas exchange between the receiving space and the atmosphere, and has a second seal, which is on an inner wall the guide device is arranged and, when the nozzle is inserted into the filler neck, the receiving space is sealed off from the atmosphere with respect to gas exchange.

The first seal and / or the second seal is / are preferably each formed as a circumferential sealing lip. Further preferably, the first seal and / or the second seal is / are designed as a double sealing lip. Furthermore, it is also possible for the first seal and / or the second seal to be designed as an O-ring. In this respect, there are the design of the second seal according to the invention no restrictions.

Further preferably, the filler neck has a second vent connection for connecting a second vent line that is fluidly connected to the interior of the operating fluid container, the second vent port being directly fluidly connected to the atmosphere.

The appropriately designed filler neck has the advantage that venting of the operating liquid container interior is still possible, even if the switch-off level within the operating liquid container interior is reached, so that no excess pressure builds up in the operating liquid container interior. Thus, an operating fluid container equipped with the appropriately formed filler neck has a further reduced tendency to spitback and splashback.

More preferably, the filler neck is designed such that the filler neck has a ring magnet, which is visibly arranged a filler flow upstream of the first sealing device.

In this case, a ventilation path running from the second ventilation connection to the atmosphere or to, for example, an adsorption filter (activated carbon filter) is preferably guided along the outside of the ring magnet.

An appropriately trained filler neck is used in particular in urea containers to hold a liquid urea solution. Further preferably, the filler neck is designed such that the filler neck has an external thread for screwing on a refill container.

Further preferably, the filler neck is designed in such a way that the filler neck has at least one thickening in the region of its outlet opening that runs around an outer wall of the filler neck.

A corresponding design of the filler neck enables it to be fixed in a filler pipe in an improved manner.

The thickening is preferably designed such that the filler neck has a fir tree profile in the region of its outlet opening.

More preferably, the filler neck is designed such that the first sealing device is formed from an elastomer.

More preferably, the filler neck is designed such that the first sealing device is designed as a shielding mushroom valve.

If a predetermined gas pressure is exceeded, a fluid flow from the receiving space to the atmosphere is made possible by means of the first sealing device.

The object underlying the present invention is further achieved by an operating fluid container for a motor vehicle, which has a filler tube for filling operating fluid into an operating fluid container interior and a venting device for venting the operating fluid container interior. The operating fluid container according to the invention is characterized in that this has one of the filler neck described above, which is fluidly connected to the filler pipe, the venting device of the operating fluid container being fluidly connected to the venting connection of the filler neck. The operating fluid container interior is in gas connection with the receiving space of the filler neck via the ventilation device if a level of the operating fluid inside the operating fluid container interior is below a certain switch-off level, and the operating fluid container interior is connected to the receiving space of the filler neck via the ventilation device, not in the gas connection device The level of the operating fluid inside the operating fluid tank interior is equal to or above the switch-off level.

The operating fluid container according to the invention enables a substantially pressure-free refueling stop without the operating fluid rising in the filler tube of the operating fluid container in order to come into contact with a sniffing hole of a Zapfven valve, so that the spitback and the splashback from the filler neck are considerably reduced and, if necessary, completely eliminated can be. At the same time, it is also possible to achieve a sufficiently large ventilation volume flow from the interior of the operating liquid container, so that a refueling process with an undiminished filling volume flow is possible.

When the operating fluid level has reached the switch-off level or a switch-off fill level, it is no longer possible to vent the interior of the operating liquid container via the breather device, which is fluidly connected to the breather connection of the filler neck by means of a breather line. Due to the Venturi effect, there is a suppression within the receiving space of the filler neck. The development of this negative pressure is possible because the first sealing device prevents gas exchange between the receiving space and the atmosphere or at least counteracts. Due to the negative pressure in the receiving space, in which a mouth end of a dispensing valve is arranged during the filling process, the dispensing valve ends the filling process.

Consequently, the operating fluid container according to the invention enables that when a filling operation is ended, the operating fluid no longer rises in the filler pipe, or does so significantly less, so that the spitback and the splashback from the filler neck can be considerably reduced and, if necessary, completely eliminated.

The ventilation device is preferably designed as a ventilation pipe or immersion pipe. More preferably, the ventilation device is designed as a ventilation and / or ventilation valve. More preferably, the ventilation device is designed as a roll-over valve.

The operating fluid container is preferably designed in such a way that it has a filler neck which has a second vent connection for connecting a second vent line which is fluidly connected to the operating fluid container interior, the second vent connection being at least indirectly fluidly connected to the atmosphere, the operating fluid container being one has second venting device for venting the operating liquid container interior, the second venting device being fluid-connected to the second venting connection of the filler neck. In this case, the operating fluid container interior is in gas communication with the atmosphere via the second venting device when a level of the operating fluid within the operating fluid container interior is below a predetermined final shutdown level. The operating liquid container interior, however, stands with the The atmosphere is not in gas communication via the second venting device if the level of the operating fluid within the operating fluid container interior is equal to or above the end shutdown level, the end shutdown level being higher than the shutdown level.

The correspondingly designed operating fluid container has the advantage that venting of the operating fluid container interior is still possible, even if the switch-off level within the operating fluid container interior is reached, so that no excess pressure builds up in the operating fluid container interior. The correspondingly designed operating fluid container thus has a further reduced tendency to spitback and splashback.

The operating fluid container is preferably designed in such a way that the filler tube has a tapering section which is arranged downstream of the filler neck with respect to an operating fluid filling direction, the tapering section having an inner diameter tapering in the direction of the operating fluid filling direction and opening into an outlet opening ,

The correspondingly designed operating fluid container has a further reduced tendency to spitback and splashback, since the provision of the tapered section in the filler pipe results in a greater pressure difference between the receiving space of the filler neck and the atmosphere and thus a greater negative pressure when venting the Operating liquid container interior is prevented by means of the venting device due to the switch-off level being reached, so that when a filling process is ended, even less operating liquid rises in the filler pipe. The receiving space of the filler neck is essentially sealed with respect to a gas exchange by means of the tapering section of the filler pipe in the case of operating fluid flowing through the tapering section into the operating liquid container interior with respect to a gas exchange, if a venting of the operating liquid container interior is vented (for example, by means of the device sealed by the operating device an ROV valve) is prevented.

More preferably, the operating fluid container is designed such that the outlet opening of the tapered section increases with increasing operating fluid volume flow.

A corresponding design of the operating fluid container enables an increased filling volume flow of operating fluid. At the same time, a gas exchange through the tapered section from the operating liquid container interior to the receiving space of the filler neck is counteracted even better.

More preferably, the operating fluid container is designed such that the tapering section is formed from an elastomer.

A corresponding design of the operating fluid container enables an increased filling volume flow of operating fluid. At the same time, a gas exchange through the tapered section from the operating liquid container interior to the receiving space of the filler neck is counteracted even better. The terms used above mean that the tapering section is sufficiently flexible to expand elastically under the influence of the flow energy of the operating fluid flowing through it, increasing the free cross-section, or to contract elastically as the amount of operating fluid decreases per unit of time, so as to reduce the size to adjust the free cross-section for the passage of the operating fluid to the respective quantity per unit of time, so that the entire cross-section is filled with operating fluid.

Further advantages, details and features of the invention are shown below from the exemplary embodiments explained. The following show in detail:

Figure 1: shows a schematic cross-sectional view of a filler neck according to the invention;

Figure 2: shows a schematic cross-sectional view of a

Filler neck according to a further embodiment of the present invention;

Figure 3a: shows a schematic cross-sectional view of a

Filler neck according to yet another embodiment of the present invention;

Figure 3b: shows a cross-sectional view of the filler neck shown in Figure 3a along a section of the plane A-A shown in Figure 3a;

Figure 4a: shows a perspective view of a second

Seal of the filler neck shown in Figures 1 to 3a from a in the installed position of the second seal in the filler neck of the insertion opening of a filler neck facing side; FIG. 4b: shows the second seal shown in FIG. 4a from a side of the filler neck facing the outlet opening of the filler neck in the installed position of the second seal;

FIG. 5: shows a cross-sectional illustration of a filler neck according to yet another embodiment of the present invention, the filler neck being used in particular in urea systems;

Figure 6: shows a perspective view of the filler neck shown in Figure 5 with a modified second sealing device;

Figure 7: shows a schematic cross-sectional view of an operating fluid container according to the invention with a filler neck shown in Figure 1, which is inserted into a filler tube of the operating fluid container; and

Figure 8: shows a schematic cross-sectional representation of a

Operating fluid container according to another embodiment of the present invention.

In the following description, the same reference numerals denote the same components or the same features, so that a description made with respect to one figure with respect to a construction also applies to the other figures, so that a repetitive description is avoided. Furthermore, individual features that have been described in connection with one embodiment can also be used separately in other embodiments. Figure 1 shows a schematic cross-sectional view of a filler neck 100 according to the invention, which is designed for an operating fluid container 200 shown in Figures 4 and 5 for a motor vehicle. The filler neck 100 has an insertion opening 101 through which a nozzle Z for loading the operating fluid container 200 can be inserted. In all the figures, only one end region of the nozzle Z is shown. The filler neck 100 also has an outlet opening 141 which can be fluidly connected to the operating fluid container 200 for introducing operating fluid into an operating fluid container interior 201. Furthermore, the filler neck 100 has a vent connection 110, which in the exemplary embodiment shown is designed as a vent neck 110. The vent connection 110 is designed to connect a vent line 210 that is fluidly connected to an operating liquid container interior 201. Both the operating liquid container interior 201 and the vent line 210 are shown in FIGS. 7 and 8.

The filler neck 100 also has a first sealing device 130 which limits a receiving space 150 formed in the filler neck 100 to the atmosphere. It can be seen from FIG. 1 that the receiving space 150 is arranged downstream of the first sealing device 130 in the filling direction and is designed to receive a mouth end ZI of the nozzle Z. It can be seen that a sniffer bore Z2 is arranged in the region of the mouth end ZI of the nozzle Z. It can also be seen from FIG. 1 that the receiving space 150 is sealed off from the atmosphere by means of the first sealing device 130 when the nozzle Z is inserted into the filler neck 100 with respect to gas exchange. Furthermore, it can be seen that the vent connection 110 opens into the receiving space 150. As can be seen from FIG. 1, the filler neck 100 also has a second sealing device 140 which faces away from the insertion opening 101 and faces the outlet opening 141 and which has a narrowing and thus tapering inner diameter in the direction from the insertion opening 101 to the outlet opening 141. The receiving space 150 is arranged between the first sealing device 130 and the second sealing device 140.

In the illustrated embodiment, the outlet opening 141 of the filler neck 100 is formed by the second sealing device 140 itself. The second sealing device 140 preferably consists of an elastomer, so that the outlet opening 141 of the filler neck 100 increases with increasing operating fluid volume flow and in turn decreases with decreasing operating fluid volume flow.

It can also be seen from FIG. 1 that a guide device 160 for guiding the nozzle Z is arranged within the filler neck 100. As shown in FIG. 2, the guide device 160 can also be designed as a guide funnel 160.

It can also be seen from FIG. 1 that the first sealing device 130 has a first seal 131 which is arranged between an inner wall 103 of the filler neck 100 and the guide device 160 and counteracts a gas exchange between the receiving space 150 and the atmosphere. Furthermore, the first sealing device 130 has a second seal 132, which is arranged on an inner wall 161 of the guide device 160 and, when the nozzle Z is inserted into the filler neck 100, seals the receiving space 150 from the atmosphere with respect to gas exchange. The operation of the filler neck 100 shown in Figure 1 will be explained later with reference to Figures 7 and 8.

FIG. 2 shows a further embodiment of the filler neck 100 according to the invention. It can be seen that the first sealing device 130 is formed as a shielding mushroom valve 130. The shielding mushroom valve 130 consists of an elastomer, so that when a predetermined limit pressure within the receiving space 150 is exceeded, the shielding mushroom valve 130 detaches from an outer wall of the guide device 160, so that an excess pressure of the receiving space 150 can be compensated for from the atmosphere.

It can also be seen from FIG. 2 that the filler neck 100 shown in FIG. 2 does not have a second sealing device 140, so that the outlet opening 141 is formed on the end of the guide device 160 facing the operating liquid container interior 201. The functioning of the filler neck 100 shown in FIG. 2 will be discussed later with reference to FIG. 8. The remaining functionality and the remaining structure of the filler neck 100 shown in FIG. 2 is identical to the filler neck 100 shown in FIG. 1, so that reference is made to the above description.

FIG. 3a shows a schematic cross-sectional illustration of a filler neck 100 according to yet another embodiment of the present invention. FIG. 3b shows a cross-sectional view of the filler neck 100 shown in FIG. 3a along a section of the plane AA shown in FIG. 3a. In the filler neck 100 shown in FIGS. 3a and 3b, the first vent connection 110 is sealed off from the receiving space 150 and opens into the guide device 160. For this purpose, the guide device 160 has a connection neck 162 which is connected to a connecting neck 111 is fluidly connected, which in turn is fluidly connected to the first venting connection 110, so that a receiving space of the guide device 160 for receiving a nozzle Z is fluidly connected to the first venting connection 110.

In the case of the appropriately designed filler neck 100, it is reliably prevented that operating fluid reaches the first ventilation connection 110 via the receiving space 150. The embodiment of the direct fluid connection of the first ventilation connection 110 with the receiving space of the guide device 160 shown with reference to FIGS. 3a and 3b is of course also applicable to the filler neck shown in FIG. 1

100 applicable.

FIG. 4a shows a perspective illustration of a possible embodiment of the second seal 132 of the filler neck 100 shown in FIGS. 1 to 3a of a filler neck 100 of the insertion opening in the installed position of the second seal 132

101 of the filler neck 100 facing side. FIG. 4b shows the second seal 132 shown in FIG. 4a from a side facing the outlet opening 141 of the filler neck 100 in the installed position of the second seal 132 in the filler neck 100.

The second seal 132 shown in FIGS. 4a and 4b is formed in two parts and has a support frame 133 and a sealing element 134, which is connected to the support frame 133 in a positive and / or non-positive manner. On the insertion opening 101 facing side of the second seal 132, the funnel-shaped is formed, so that a nozzle Z through the funnel-shaped form of the second seal 132 can be passed through the opening thereof. The support frame 133 can be made of a plastic or a metal. The appropriately designed second seal 132 has a high stability, which is particularly advantageous for a repeated execution of a nozzle Z. Furthermore, the appropriately designed second seal 132 has a high sealing effect despite its high stability.

FIG. 5 shows a cross-sectional illustration of a filler neck 100 according to yet another embodiment. It can be seen from FIG. 5 that the filler neck 100 has a second vent connection 120 for connecting a second vent line 220 which is fluidly connected to the operating fluid container interior 201. The second ventilation connection 120 is at least indirectly fluid-connected to the atmosphere, for example with an adsorption filter arranged between the second ventilation connection 120 and the atmosphere, which can be formed, for example, as an activated carbon filter. In addition, the filler neck 100 has a first vent connection 110, which opens into the receiving space 150.

It can be seen that the first sealing device 130 is designed as a double sealing lip 130 running around, which nestles against an outer wall of the nozzle Z, so that gas exchange between the receiving space 150 and the atmosphere is prevented by means of the first sealing device 130.

The second sealing device 140 is formed in the exemplary embodiment shown as a conical tube 140, the inner diameter of which tapers in the direction from the insertion opening 101 in the direction of the outlet opening 141. The second sealing device 140 is formed from an elastomer, so that the diameter of the outlet opening 141 increases or decreases as a function of the operating fluid volume flow through the second sealing device 140. The filler neck 100 shown in Figure 5 also has in a connecting area for connecting or inserting into a filler pipe a fir tree profile 190, which is formed in the illustrated embodiment by three circumferential Thickenings 190 Ver. In the area of the insertion opening 101, the filler neck 101 has an external thread 180, onto which, for example, a refill container can be screwed. The refill can, for example, be a bottle of Krus.

Furthermore, the filler neck shown in FIG. 5 also has a ring magnet 170, by means of which the nozzle valve Z inserted into the filler neck 100 can be activated.

It can be seen from FIG. 5 that the first ventilation connection 110 opens into the receiving space 150. The second ventilation connection 120, on the other hand, opens outside the receiving space 150, so that a ventilation volume flow through the second ventilation connection 120 past the ring magnet 170 and through an annular gap between the nozzle Z and the inner channel of the filler neck 100 shown in FIG. 5 is made possible.

The second sealing device 140 can be formed in one piece with the filler mares 100. Furthermore, it is possible for the second sealing device 140 to be plugged onto and / or clipped onto the fir tree profile 190.

FIG. 6 shows a perspective illustration of the filler neck 100 shown in FIG. 5 with a modified second sealing device 140. It can be seen that the second sealing device 140 is provided with an opening 142 in the region of the outlet opening 141. FIG. 7 shows an operating fluid container 200 according to the invention for a motor vehicle. The operating liquid container 200 has a first venting device 251 for venting the operating liquid container interior 201. Furthermore, the operating fluid container 200 has a second venting device 252 for venting the operating fluid container interior 201. A filler neck 100, which is shown in detail in FIG. 5, is inserted into a filler pipe 230 of the operating fluid container 200. The first venting device 251, which can be designed, for example, as a dip tube 251, is fluidly connected to the first venting connection 110 of the filler neck 100 via a first venting line 210. The second ventilation device 252 is fluidly connected to the second ventilation connection 120 of the filler neck 100 via a second ventilation line 220.

The operating fluid container interior 201 is in gas connection with the receiving space 150 of the filler neck 100 via the first venting device 251 when a level of the operating fluid inside the operating fluid container interior 201 is below a predetermined switch-off level. In the example shown in FIG. 4, however, the level of the operating fluid within the operating fluid container interior 201 is above a predetermined switch-off level, since the immersion tube 251 projects into the operating fluid B. Consequently, the operating fluid container interior space 201 is not in gas connection with the receiving space 150 of the filler neck via the first ventilation device 251, since the level of the operating fluid B within the operating fluid reservoir interior space 201 is equal to or above the switch-off level.

It can be seen from FIG. 7 that the level of the operating fluid B within the operating fluid container interior 201 is below a final cut-off level, since the second ventilation device 252 does not dip into the operating liquid B. Consequently, the operating liquid container interior 201 is in gas communication with the atmosphere via the second ventilation device 252. If, on the other hand, the level of the operating liquid within the operating liquid container interior 201 is equal to or above the limit switch-off level, the operating liquid container interior 201 is not in gas connection with the atmosphere via the second venting device 252.

The operating fluid container 200 shown in FIG. 7 functions in such a way that when operating fluid B is poured into the operating fluid container interior 201 via the filling tube 230, the first venting device 251 is first closed by the operating fluid B, so that the receiving space 150 is no longer included is in gas connection with the operating liquid container interior 201. By further introducing operating fluid by means of the Zapfven valve Z, a suppression occurs within the receiving space 150, which is generated by the Venturi effect. Due to the negative pressure generated in the receiving space 150 of the filler neck 100, the nozzle Z switches off, so that no further operating liquid is introduced. The second sealing device 140 further reinforces the negative pressure within the receiving space 150, so that an increased pressure difference is formed between the receiving space 150 and the atmosphere.

By further introducing operating fluid by means of the dispensing valve Z, for example in the course of refueling operations, the operating fluid level within the operating fluid container interior 201 increases successively until the second venting device 252 is also closed by the operating fluid B, so that there is no longer any gas exchange between the operating fluid container interior 201 and the atmosphere is possible. By further introducing operating fluid, the level of the operating fluid B within the filler pipe 230 also rises. FIG. 8 shows a modification of the operating liquid container 200 shown in FIG. 7. The filler neck 100 no longer has the second sealing device 140. The function of the second sealing device 140 is taken over by the filler pipe 230 itself. For this purpose, the filler pipe 230 has a tapering section 240, which is arranged downstream of the filler neck 100 with respect to an operating liquid filler direction. The tapering section 240 has an inner diameter tapering in the direction of the operating fluid filling direction and opens into an outlet opening 241.

The tapered section 240 is preferably formed from an elastomer, so that the outlet opening 241 of the tapered section 240 increases with increasing operating fluid volume flow.

LIST OF REFERENCE NUMBERS

100 filler neck

101 insertion opening

103 inner wall (of the filler neck)

110 (first) vent connection

111 connecting piece (of the first vent connection)

120 (second) vent connection

130 first sealing device / screen mushroom valve

131 first seal (of the first sealing device)

132 second seal (of the first sealing device)

133 support frame (the second seal)

134 sealing element (of the second seal)

140 second sealing device

141 outlet opening

142 Cut-out / material recess

150 receiving space (of the filler neck)

160 guide device / guide funnel (of the filler neck)

161 inner wall (of the guide device)

162 connecting piece (of the guide device)

170 magnet / ring magnet

180 external thread (of the filler neck)

190 thickening / fir tree profile (of the filler neck)

200 operating fluid containers

201 operating fluid tank interior

202 top wall (of the operating fluid container)

210 (first) vent line

220 (second) vent line

230 filler pipe

240 taper section (of the filler tube)

241 outlet opening (of the tapered section) 251 (first) ventilation device / (first) dip tube

252 (second) ventilation device / (second) dip tube

B operating fluid

Z nozzle

ZI muzzle end (of the nozzle)

Z2 sniffer bore (of the nozzle)

Claims

claims

1. filler neck (100) for an operating fluid container (200) for a motor vehicle, the filler neck (100) having the following:

an insertion opening (101) through which a dispensing valve (Z) for filling the operating fluid container (200) can be inserted;

an outlet opening (141) which is in fluid communication with the operating liquid container (200) for introducing operating liquid into an operating liquid container interior (201); and

a vent connection (110) for connecting a vent line (210) fluidly connected to an operating liquid container interior (201),

the filler neck (100) being characterized by the following features:

the filler neck (100) has a first sealing device (130);

the filler neck (100) has a receiving space (150) which is arranged in the filling direction downstream of the first sealing device (130) and is designed to receive a mouth end (ZI) of the nozzle valve (Z);

the receiving space (150) is sealed from the atmosphere with respect to gas exchange by means of the first sealing device (130) when the nozzle (Z) is inserted into the filler neck (100); and

the vent connection (110) opens into the receiving space (150).

2. Filler neck (100) according to claim 1, characterized by the following features:

the filler neck (100) has one facing away from the insertion opening (101) and towards the outlet opening (141) second sealing device (140), which has a narrowing in direction from the insertion opening (101) to the outlet opening (141); and

the receiving space (150) is arranged between the first sealing device (130) and the second sealing device (140).

3. filler neck (100) according to one of the preceding claims, characterized in that the outlet opening (141) of the filler neck (100) increases with increasing operating fluid volume flow.

4. filler neck (100) according to claim 2 or 3, characterized in that the outlet opening (141) of the filler neck (100) is formed by the second sealing device (140).

5. filler neck (100) according to one of the preceding claims, characterized in that the second sealing device (140) is formed from an elastomer.

6. filler neck (100) according to one of the preceding claims, characterized in that the filler neck (100) has a guide device (160) for guiding the nozzle (Z) inside the filler neck (100).

7. filler neck (100) according to claim 6, characterized by the following features:

the first sealing device (130) has a first seal (131) which is arranged between an inner wall (103) of the filler neck (100) and the guide device (160) and counteracts a gas exchange between the receiving space (150) and the atmosphere; and the first sealing device (130) has a second seal (132) which is arranged on an inner wall (161) of the guide device (160) and, when the nozzle (Z) is inserted into the filler neck (100), the receiving space (150) opposite the Sealed atmosphere with respect to gas exchange.

8. filler neck (100) according to one of the preceding claims, characterized by the following features:

the filler neck (100) has a second vent connection (120) for connecting a second vent line (220) which is fluidly connected to the interior of the operating fluid container (201); and

the second vent connection (120) is at least indirectly fluid-connected to the atmosphere.

9. filler neck (100) according to one of the preceding claims, characterized in that the filler neck (100) has a ring magnet (170) which is arranged with respect to a filler flow upstream of the first sealing device (130).

10. filler neck (100) according to one of the preceding claims, characterized in that the filler neck (100) has an external thread (180) for screwing on a refill container.

11. filler neck (100) according to one of the preceding claims, characterized in that the filler neck (100) in the region of its outlet opening (141) has at least one on a ner outer wall of the filler neck (100) surrounding thickening (190).

12. Filler neck (100) according to one of the preceding claims, characterized in that the first sealing device (130) is formed from an elastomer.

13. Filler neck (100) according to one of the preceding claims, characterized in that the first sealing device (130) is designed as a shielding mushroom valve (130).

14. Operating fluid container (200) for a motor vehicle, comprising:

a filling pipe (230) for filling operating liquid into an operating liquid container interior (201);

a venting device (251) for venting the operating fluid container interior (201),

wherein the operating fluid container (200) is characterized by the following features:

the operating fluid container (200) has a filler neck (100) according to one of claims 1 to 13, which is fluidly connected to the filler pipe (230);

the venting device (251) is fluidly connected to the venting connection (110) of the filler neck (100); the operating fluid container interior (201) is in gas connection with the receiving space (150) of the filler neck (100) via the ventilation device (251) when a level of the operating fluid inside the operating fluid interior container interior (201) is below a predetermined switch-off level; and

the operating fluid container interior (201) is not in gas connection with the receiving space (150) of the filler neck (100) via the ventilation device (251) if the level of the operating fluid inside the operating fluid container interior (201) is equal to or above the switch-off level.

15. Operating fluid container (200) according to claim 14, characterized by the following features:

the operating fluid container (200) has a filler neck (100) with the features of claim 8;

the operating fluid container (200) has a second venting device (252) for venting the operating fluid container interior (201);

the second ventilation device (252) is fluidly connected to the second ventilation connection (120) of the filler neck (100);

the operating fluid container interior (201) is in gas communication with the atmosphere via the second venting device (252) when a level of the operating fluid inside the operating fluid container interior (201) is below a predetermined end cut-off level;

the operating fluid container interior (201) is not in gas connection with the atmosphere via the second venting device (252) if the level of the operating fluid speed within the operating fluid container interior (201) is equal to or above the limit switch-off level; and the final cut-off level is higher than the cut-off level.

16. Operating fluid container (200) according to claim 14 or 15, characterized by the following features:

the filler pipe (230) has a tapered section

(240), which is arranged downstream of the filler neck (100) with respect to an operating fluid filling direction; and

the tapering section (240) has a tapering inner diameter in the direction of the operating fluid filling direction and opens into an outlet opening

(241).

17. Operating fluid container (200) according to claim 16, characterized in that the outlet opening (241) of the Tapered section (240) enlarged with increasing operating fluid volume flow.

18. Operating fluid container (200) according to claim 16 or 17, characterized in that the tapering section (240) is formed from an elastomer.