DE102009009676A1 - Container arrangement for vehicle, has auxiliary medium container arranged in inner side of fuel container, and heating device for heating auxiliary medium in auxiliary medium container and comprising switching device - Google Patents

Abstract

The arrangement (10) has a fuel container (12), and an auxiliary medium container (14) arranged in an inner side of the fuel container. A heating device heats an auxiliary medium in the auxiliary medium container, and has a switching device that is controlled based on temperature of the auxiliary medium. An auxiliary medium pipe (16) is provided for supplying the auxiliary medium to an exhaust gas treatment device of a vehicle, and a separating element is formed as a single-piece with the containers, where the containers are made from multilayered plastic material.

Description

The The invention relates to a container arrangement for a vehicle, with a fuel tank, and with one Auxiliary container, wherein the auxiliary container is arranged inside the fuel tank. Furthermore The invention relates to a container arrangement for a vehicle, with a fuel tank, and with one Auxiliary container, wherein the auxiliary container is arranged on the fuel tank.

The EP 0 976 677 A1 describes a device for simultaneously filling a fuel tank and a resource container. Here, the auxiliary container is disposed within the fuel tank of a vehicle and suspended by struts on an upper wall of the fuel tank. A filling line for filling the auxiliary container is arranged within a filling line for filling the fuel tank. By way of a filling nozzle which can be introduced simultaneously into both filling lines and which has two separate outlet tubes, the fuel tank and the auxiliary container can be filled at the same time. The auxiliary container is used for storing an aqueous urea solution. When operating an internal combustion engine of the vehicle with the fuel resulting exhaust gas is added in an exhaust gas treatment device of the vehicle with the aqueous urea solution. By means of selective catalytic reduction (SCR), nitrogen oxide contained in the exhaust gas in an SCR catalytic converter is converted into ammonia with ammonia liberated from the aqueous urea solution.

Especially due to the arrangement of the filling tubes into each other is the Structure of this container arrangement comparatively complex. In addition, both the auxiliary container as well as the filling a limited Accessibility. Furthermore, the deployment can of the aid cause problems.

task It is therefore the object of the present invention to provide a container assembly of the type mentioned to improve functionally.

These The object is achieved by a container arrangement with the features of claim 1, and by a container assembly solved with the features of claim 3. advantageous Embodiments with expedient developments The invention are in the respective dependent claims specified.

According to one The first aspect of the invention comprises the container assembly for a vehicle a fuel tank and a tool container, wherein the auxiliary container completely inside the fuel tank is arranged. In this case, the container arrangement comprises a Heating device for heating the auxiliary. The invention is the Understanding that problems in providing the tool This may be due to the fact that low outside temperatures can lead to a freezing of the aid. Does the container assembly so the heater on so a sustainable provision of the resource is especially on reliable manner. The Container arrangement is thus functionally improved.

If it is, the assistant to a, for example, available under the trade name AdBlue ^®, urea aqueous solution, it can freeze if its temperature drops below the freezing point of -11.5 ° C. This can be counteracted by the heater for heating the tool.

In an advantageous embodiment of the invention, the auxiliary container of at least one inner wall of the fuel tank be spaced apart. Thus, between the inner wall of the Fuel tank and the outer wall of the aid container Fuel flow, which is a cooling, in particular in freezing, may delay the aid. Of Furthermore, so can the heat capacity the fuel and the aid in an improved way in common be used.

According to one Another aspect of the invention is a functionally improved container arrangement provided for a vehicle, which is a fuel tank and a resource container, wherein the auxiliary container is arranged on the fuel tank, and wherein the Aid container at least partially outside of the fuel tank is arranged. This is one improved accessibility of the aid container given. An arrangement of filling lines and / or vent lines and / or extraction lines to the respective container so also relieved.

By the spatial proximity of resource containers and fuel tank is a freezing of the aid in the auxiliary container even at a low temperature only comparatively late. So can be beneficial a common Thermal and energy management for the fuel tank and the aid container are used.

The auxiliary container can be separated by a separating element of the fuel tank. The concomitant reduction of the volume of the fuel tank in a space provided for the container assembly space in the driving ensures a reduction in the total weight of the container assembly. This is accompanied by a reduction of the vehicle weight, from which inter alia a reduced fuel consumption results.

According to one advantageous embodiment of the invention, the separating element integral with the fuel tank and / or be formed with the aid container. For example can the auxiliary container in this case by squeezing be formed of a part of the fuel tank, wherein the squeezed portion of the fuel tank has a separate volume for the resource container. In this Case, the separating element is integral with both the fuel tank as well as with the resource container. alternative may be a unilaterally open portion of the aid container be arranged on the fuel tank, so that a previous outer wall of the fuel tank then the integral with the fuel tank separator forms.

In an alternative embodiment, the separating element be designed as a partition, which between a first, the Fuel tank associated section the container assembly and a second, the auxiliary container associated portion of the container assembly is introduced. This is a particularly uniform Wall thickness of the container assembly accessible.

The Pieces may in particular by means of two-plate molding be formed and connected to the partition. With such, also referred to as twin-sheet process manufacturing process is a particularly simple way a particularly high density when separating the container volumes reachable from each other.

at the container assembly, wherein the auxiliary container at least partially outside the fuel tank is arranged, the container arrangement comprises in an advantageous manner Way a heater for heating the tool. Thereby is a provision of the aid even at low temperatures gewährleistbar.

When further advantageously, it has been shown when the heater with in excess from the fuel tank too an internal combustion engine promoted, in the fuel tank rückzuführendem fuel is acted upon. Thus, the comparatively serves in the environment of the internal combustion engine highly heated fuel for introducing heat into the aids located in the auxiliary container. Conversely, cools the aid in an advantageous manner the recirculated fuel. Especially if availability of the tool temporarily is not given, because the tool about after a cold start is present in the auxiliary container in the frozen state, creates here the recycled hot fuel Quick remedy without another source of energy necessarily the vehicle needs to be charged.

When Further advantageously, it has shown here, when the heater a heat exchanger. This is a special intense heat transfer from the recirculated Fuel is available on the tool. Preferably, the Heat exchanger within the aid container Find.

According to one In another advantageous embodiment of the invention, the heating device comprises a Switching device, by means of which at least a partial flow of the recirculating fuel of a bypass line for bypassing the aid container can be fed is. To ensure good accessibility, In particular, the switching device and / or the Bypass line outside the resource container be arranged. By providing the switching device can a Heating the aid in the auxiliary container optionally only take place if this is for thawing or heating of the tool and thus its sustainable provision is required.

From The advantage here is when the switching device in dependence can be controlled by a temperature of the auxiliary. This is overheating the tool, which otherwise, for example to unwanted precipitations in the aid could lead, avoidable.

at the auxiliary container may in particular be a Trade container for a reducing agent, by means of which nitrogen oxides can be reduced in the exhaust gas of the internal combustion engine are. The container assembly then comprises an auxiliary line, via which is the aid of an exhaust treatment device of the vehicle can be fed.

Of the Auxiliary container can in particular by means of a welded connection and / or arranged by means of a snap connection to the fuel tank be. The provision of the snap connection allows a simple replacement of the resource container, for example if due to a reduced consumption of the internal combustion engine a resource container with a reduced volume to be arranged on the fuel tank. Is already a welded joint for placing the aid container provided on the fuel tank, so the snap connection serve an additional position fixation.

It is also advantageous if the auxiliary container and the fuel tank at least partially formed of a same, in particular multi-layered, plastic material. By harmonizing or harmonizing the material used for the container, a cost saving can be achieved. Furthermore, this results in the advantage that auxiliary container and fuel tank with respect to tightness and / or at least one mechanical property are functionally identical.

According to one Another advantageous embodiment of the invention is a filling line the auxiliary container at least substantially one Course of a filling line of the fuel tank formed following. This is an external refueling of Aid container feasible. As these are from a vehicle user is simply feasible, can be a comparatively small Volume provided for the auxiliary container be, which contributes to a further reduction in vehicle weight. About that In addition, in contrast to the space of the fuel tank separately placing the aid container in the vehicle, For example, in an inverted Ersatzradmulde, laying the Filling of the aid container simplified. The filling line that does not need so from the Ersatzradmulde forth the bodyshell to be passed. The spare wheel well is then again to accommodate a spare wheel and / or other Vehicle components available.

From Another advantage is when the filling openings the respective filling line are arranged side by side. Thus, in a refueling process, the fuel tank can optionally or the resource tank to be refueled. Depending on the design the fuel nozzle, which then two side by side arranged in parallel Having outlet tubes, but can also be a simultaneous, time-saving Filling the fuel tank and auxiliary tank be provided.

After all it has proved to be advantageous if the container arrangement has a recess, which for bridging a tunnel of a body component is formed. So can the container arrangement can be arranged above the center tunnel, which above of components of the drive train of the vehicle is arranged and receives these components at least partially. This is a particularly crash-proof arrangement of fuel tank and auxiliary container, for example, below a rear seat, possible in the vehicle.

The features and feature combinations mentioned above in the description as well as the below mentioned in the figure description and / or in the figures alone shown features and feature combinations are not only in the specified combination, but also usable in other combinations or in isolation, without to leave the scope of the invention.

Further Advantages, features and details of the invention will become apparent the claims, the following description is more preferred Embodiments and with reference to the drawings. Showing:

1 a perspective view of a container assembly for a vehicle, which comprises a fuel tank and a disposed within the fuel tank auxiliary container;

2 a highly schematic sectional view of a second embodiment of a container assembly in which the auxiliary container is separated by a partition wall of the fuel tank;

3 a highly schematic sectional view of another embodiment of the container assembly, wherein the auxiliary container is formed by squeezing a partial volume of the fuel tank;

4 a highly schematic sectional view of another embodiment of the container assembly, wherein the auxiliary container is arranged by means of welded joints on the fuel tank;

5 a highly schematic sectional view through the embodiment of the container assembly, wherein the auxiliary container is disposed completely within the fuel tank; and

6 a schematic further embodiment of the container assembly, which comprises a heating device for heating the auxiliary.

1 shows a first embodiment of a container assembly 10 , which is a fuel tank 12 and one inside the fuel tank 12 arranged auxiliary container 14 includes. From the hidden inside the fuel tank 12 arranged auxiliary container 14 leads an auxiliary line 16 to a metering unit, by means of which the auxiliary, for example an aqueous urea solution, upstream of an SCR catalyst in an exhaust line of the vehicle can be introduced. In the SCR catalyst, nitrogen oxide contained in exhaust gas by selective catalytic reduction (SCR) in the exhaust gas is convertible to nitrogen with ammonia released from the aqueous urea solution.

The container arrangement 10 has a central indentation 18 on, which is designed for bridging a center tunnel. In the vehicle so are the fuel tank 12 and the resource container 14 arranged in the same, particularly crash-proof space below a rear seat. A filling line 20 of the fuel tank 12 and a filling line 22 of the resource container follow each other in the course. filling openings 24 . 26 the common course having filling lines 20 . 22 are arranged side by side, leaving the fuel tank 12 and the resource container 14 be filled independently by means of a respective fuel nozzle.

2 shows an alternative embodiment of the container assembly 10 in which the volume of the fuel tank 12 through a first section 28 the container arrangement 10 in cooperation with a partition 30 is formed. The volume of the aid container 14 is in contrast by a second section 32 the container arrangement 10 in cooperation with the partition 30 educated. The partition 30 is here between the sections formed by means of a twin-sheet process 28 . 32 introduced and with the sections 28 . 32 connected.

In an alternative embodiment of the container arrangement 10 according to 3 is a separator 34 by squeezing the for the aid container 14 provided volume of the container assembly 10 educated. The separating element 34 So it is integral with the fuel tank 12 and the resource container 14 educated. Squeezing the as a resource container 14 serving volume can be done during inflation or subsequent to the inflation of a multilayered plastic material in an injection mold. Here are the fuel tank 12 and the resource container 14 formed from the same, uniform plastic material.

At the in 4 shown embodiment of the container assembly 10 is the resource tank 14 by means of welded joints 36 on the fuel tank 12 arranged. The resource tank 14 Here is one of the fuel tank 12 different component, which may be formed of a different material. Complementary or alternative to the welded joint 36 may be provided a snap connection.

At the in 5 shown embodiment of the container assembly 10 is the resource tank 14 completely inside the fuel tank 12 arranged. To wash around the aid container 14 with fuel, the resource tank can 14 be supported on ribs not shown here. In particular, these ribs may be between a bottom of the fuel tank 12 and a bottom of the resource tank 14 run. Inside the fuel tank 12 is the resource tank 14 held secured position, in particular by means of at least one clip connection or the like. The container arrangement 10 also includes a heating device, not shown, for heating the auxiliary.

At the in 6 schematically shown embodiment of the container assembly 10 this includes a heating device 38 for heating the aid. The heater 38 is acted upon by fuel, which in excess from the fuel tank 12 conveyed to an internal combustion engine of the vehicle and from there back into the fuel tank 12 is returned. The heater 38 includes one within the aid container 14 arranged heat exchanger 40 , via which a particularly good heat transfer from the hot recycled fuel to the aid can be realized.

Upstream of the heat exchanger 40 and outside the aid container 14 is a switching valve as a switching device 42 arranged. The changeover valve 42 allows the recirculated fuel of a bypass line 44 for bypassing the aid container 14 supply. Downstream of the heat exchanger 40 the recirculated fuel opens at a preferred outside the aid container 14 arranged confluence point in the bypass line 44 ,

If the aid in the aid container 14 has reached a predetermined temperature, can increasingly more fuel through the bypass line 44 and increasingly less fuel through the heat exchanger 40 a mouth 46 the return line are fed, which within the fuel tank 12 is arranged. About the changeover valve 42 is also a flow through the heat exchanger 40 completely repositionable with recirculated fuel.

At the in 6 shown embodiment of the container assembly 10 is the resource tank 14 through the partition 30 from the fuel tank 12 disconnected. Is in an alternative embodiment of the auxiliary container 14 inside the fuel tank 12 arranged, so supports the heater 38 in addition to the resource tank 14 rinsing fuel the sustainable providing of the resource.

The schematic representation of the container arrangement 10 is also exemplary of embodiments in which the auxiliary container 14 completely inside the fuel tank 12 is arranged.

In any case, carries the spatially close arrangement of the aid container 14 on the fuel tank 12 to a delayed freezing of the aid in the auxiliary container 14 after a decommissioning of the internal combustion engine at.

10

A container assembly

12

Fuel tank

14

tool container

16

resource management

18

indentation

20

filling line

22

filling line

24

filling

26

filling

28

first section

30

partition wall

32

second section

34

separating element

36

welded joint

38

heater

40

heat exchangers

42

switching valve

44

bypass line

46

muzzle

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 0976677 A1 [0002]

Claims (17)

Container arrangement for a vehicle, with a fuel tank ( 12 ), and with a tool container ( 14 ), wherein the auxiliary container ( 14 ) inside the fuel tank ( 12 ), characterized in that the container arrangement ( 10 ) a heating device ( 38 ) for heating the aid. Container arrangement according to claim 1, characterized in that the auxiliary container ( 14 ) of at least one inner wall of the fuel tank ( 12 ) is arranged at a distance. Container arrangement for a vehicle, with a fuel tank ( 12 ), and with a tool container ( 14 ), wherein the auxiliary container ( 14 ) on the fuel tank ( 12 ), characterized in that the auxiliary container ( 14 ) at least partially outside of the fuel tank ( 12 ) is arranged. Container arrangement according to claim 3, characterized in that the auxiliary container ( 14 ) by a separating element ( 30 . 34 ) from the fuel tank ( 12 ) is separated. Container arrangement according to claim 4, characterized in that the separating element ( 30 ) - in one piece with the fuel tank ( 12 ) and / or with the aid container ( 14 ) or - as a partition ( 30 ) formed between a first, the fuel tank ( 12 ) associated section ( 28 ) of the container arrangement ( 10 ) and a second, the auxiliary container ( 14 ) associated section ( 32 ) of the container arrangement ( 10 ) is introduced. Container arrangement according to claim 5, characterized in that the sections ( 28 . 32 ) formed by two-plate molding and with the partition ( 30 ) are connected. Container arrangement according to one of Claims 3 to 6, characterized in that the container arrangement ( 10 ) a heating device ( 38 ) for heating the aid. Container arrangement according to claim 1, 2 or 7, characterized in that the heating device ( 38 ) with in excess from the fuel tank ( 12 ) conveyed to an internal combustion engine, into the fuel tank ( 12 ) can be acted upon rückzuführendem fuel. Container arrangement according to claim 8, characterized in that the heating device ( 38 ) a heat exchanger ( 40 ). Container arrangement according to claim 8 or 9, characterized in that the heating device ( 38 ) a switching device ( 42 ) by means of which at least a partial flow of the fuel to be recirculated a bypass line ( 44 ) for bypassing the aid container ( 14 ) can be fed. Container arrangement according to claim 10, characterized in that the switching device ( 42 ) is controllable in dependence on a temperature of the auxiliary. Container arrangement according to one of Claims 1 to 11, characterized in that the container arrangement ( 10 ) an auxiliary line ( 16 ), via which the aid can be supplied to an exhaust gas treatment device of the vehicle. Container arrangement according to one of claims 1 to 12, characterized in that the auxiliary container ( 14 ) by means of a welded connection ( 36 ) and / or by means of a snap connection to the fuel tank ( 12 ) is arranged. Container arrangement according to one of claims 1 to 13, characterized in that the auxiliary container ( 14 ) and the fuel tank ( 12 ) are at least partially formed of a same, in particular multi-layered, constructed plastic material. Container arrangement according to one of claims 1 to 14, characterized in that a filling line ( 22 ) of the aid container ( 14 ) at least substantially a course of a filling line ( 20 ) of the fuel tank ( 12 ) is formed following. Container arrangement according to claim 15, characterized in that filling openings ( 24 . 26 ) of the respective filling line ( 20 . 22 ) are arranged side by side. Container arrangement according to one of Claims 1 to 16, characterized in that the container arrangement ( 10 ) a recess ( 18 ), which is designed for bridging a tunnel of a body component.