DE102009033858A1 - Filter arrangement for vehicle, has activated carbon filter for storing gaseous emissions of fuel supply device, and heating device for heating filter device, where heating device is subjectable to thermal energy of exhaust gas - Google Patents

Abstract

The arrangement (10) has an activated carbon filter (12) for storing gaseous emissions of a fuel supply device of a vehicle, and a heating device (22) for heating the filter. The heating device is subjectable to thermal energy of exhaust gas. The heating device has a heat collector (24) that absorbs heat radiation (26) of an exhaust tract (20) and a heat distributor (32). The collector and the distributor are connected with each other by a heat conductor (34), where a filtering medium of the filter device consists of activated carbon (30). An independent claim is also included for a method for heating a filter device of a vehicle.

Description

The The invention relates to a filter arrangement, in particular for a vehicle with a filter device for storing gaseous Emissions of a fuel supply device and with a Heating device for heating the filter device. Furthermore The invention relates to a method for heating a filter device.

The DE 199 52 092 C1 describes an activated carbon filter which serves to reduce gaseous emissions of a fuel supply device of a vehicle. Here, a filter layer of the activated carbon filter is electrically heated. When the activated carbon filter is heated, it is easier to regenerate the activated carbon filter, that is, to discharge stored fuel constituents.

task It is the object of the present invention to provide an improved filter assembly of the type mentioned and an improved method for heating to provide a filter device.

These The object is achieved by a filter arrangement having the features of the patent claim 1 and by a method having the features of the claim 7 solved. Advantageous embodiments with appropriate Further developments of the invention are in the dependent claims specified.

at the filter assembly according to the invention, in particular for a vehicle, with a filter device for storage gaseous emissions of a fuel supply device and a heater for heating the filter device the heater is acted upon by thermal energy of an exhaust gas. By heating the filter device is a levy of originating in gaseous emissions and in the Filter device stored fuel components easier. It is therefore only a comparatively for regenerating the filter device small amount of flushing medium necessary.

Of Further needs so no active control and especially no over the thermal energy of the exhaust gas beyond energy supply to be provided for the heater. It leaves so a particularly easy and simple construction of the filter assembly realize.

Furthermore is it possible, a relatively small filter device What to do, especially when used in a vehicle the claimed by the filter device space advantage is.

In An advantageous embodiment of the invention comprises the heating device a heat collector, which is for receiving a heat radiation an exhaust line is formed. The heat collector So then is spaced from the exhaust line. additional or alternatively, the heat collector at least partially with the exhaust line in plant, so be arranged on the exhaust line, and / or the heat collector can at least partially be formed by the exhaust line. The spaced from the exhaust line Heat collector shields the filter device before an undefined heat of the exhaust system. The heat collector allows a defined introduction of the for regenerating the filter device serving heat in designated areas of the filter device.

Of the Heat collector can with a housing of the filter device be at least partially in plant. Complementary or Alternatively, by the heat collector at least partially a housing of the filter device may be formed. This is a very space-saving design of the filter assembly accessible.

According to one Another aspect of the invention is an improved method for Heating a filter device, in particular for a Vehicle, created in which the filter device gaseous Stores emissions from a fuel supply, and in which for heating the filter device thermal energy an exhaust gas is introduced into the filter device.

The for the filter assembly described preferred advantages and embodiments also apply to the invention Method for heating a filter device.

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 sectional view of a filter assembly in which exhaust gas flowing through an exhaust line provides heat for heating an activated carbon filter; and

2 a perspective view of the Filter arrangement according to 1 ,

An in 1 shown filter assembly 10 includes an activated carbon filter 12 which is used to store gaseous emissions of a fuel supply device of a vehicle. About an inlet 14 is gaseous in a fuel tank and / or connected to the fuel tank lines present fuel in the activated carbon filter 12 brought in. About a first outlet 16 can the stored gaseous fuel when purging the activated carbon filter 12 be supplied to a combustion in the internal combustion engine of the vehicle. About another connection 18 is a venting of the activated carbon filter 12 towards a fresh air atmosphere possible.

Once a storage capacity of the activated carbon filter 12 is exhausted, the activated carbon filter 12 regenerates, the stored fuel components are thus discharged. Due to the operation of the internal combustion engine with stratified charge and / or due to the use of turbochargers is to regenerate the activated carbon filter 12 a comparatively small amount of flushing medium ready.

In the present case, thermal energy of the exhaust gas of the internal combustion engine is used for heating the activated carbon filter 12 and thus a facilitated discharge of the stored media. The thermal energy is passed through one adjacent to the activated carbon filter 12 arranged and exhaust gas flowed through the exhaust system 20 provided.

One for introducing the thermal energy of the exhaust gas into the activated carbon filter 12 provided heating device 22 includes a heat collector 24 which is for receiving a heat radiation 26 of the exhaust system 20 is trained. The heat collector 24 can, as shown here by way of example, be formed as a shielding plate, which in its longitudinal extent the diameter of the exhaust line 20 slightly exceeds. Also is a bend of the heat collector 24 chosen so that a direct loading of a housing 28 of the activated carbon filter 12 with the heat radiation 26 is largely avoided.

Inside the activated carbon filter 12 , in which, as a filter medium (only schematically and selectively shown) activated carbon 30 located, includes the heater 22 a heat spreader 32 , which ensures efficient and targeted heat transfer to the activated carbon 30 provides.

To transfer the heat from the heat collector 24 at the inside of the activated carbon filter 12 arranged heat spreader 32 are heat conductors 34 provided which through corresponding openings in the housing 28 of the activated carbon filter 12 passed through. The shape and position of the heat spreader 32 depends on the shape of the activated carbon filter 12 from. There may also be more than the present example and schematically shown a heat conductor 32 in the activated carbon filter 12 be provided. In an analogous manner, shape, number and position of the heat conductors 34 to the particular shape of the activated carbon filter 12 be adjusted. The training of heat spreaders 32 and / or heat conductors 34 also depends on the amount and spatial arrangement of the filter medium, in this case the activated carbon 30 from.

In alternative embodiments, the heat collector 24 directly to the housing 28 of the activated carbon filter 12 be connected or at least partially the housing 28 of the activated carbon filter 12 form. In the latter case is the heat collector 24 then directly with the activated carbon to be regenerated 30 in contact.

LIST OF REFERENCE NUMBERS

10

A filter assembly

12

Activated carbon filter

14

inlet

16

outlet

18

connection

20

exhaust gas line

22

heater

24

heat collector

26

thermal radiation

28

casing

30

activated carbon

32

heat spreader

34

heat conductor

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

• - DE 19952092 C1 [0002]

Claims (7)

Filter arrangement, in particular for a vehicle, with a filter device ( 12 ) for storing gaseous emissions of a fuel supply device and with a heating device ( 22 ) for heating the filter device, characterized in that the heating device ( 22 ) can be acted upon by thermal energy of an exhaust gas. Filter arrangement according to claim 1, characterized in that the heating device ( 22 ) a heat collector ( 24 ), which is for receiving a heat radiation ( 26 ) of an exhaust gas line ( 20 ) and / or on an exhaust line ( 20 ) and / or at least partially by an exhaust line ( 20 ) is formed. Filter arrangement according to claim 2, characterized in that the heat collector ( 24 ) with a housing ( 28 ) of the filter device ( 12 ) at least partially in the plant and / or by the heat collector ( 24 ) at least partially a housing ( 28 ) of the filter device ( 12 ) is formed. Filter arrangement according to one of claims 1 to 3, characterized in that the heating device ( 22 ) a heat spreader ( 32 ), which at least partially within the filter device ( 12 ) is arranged. Filter arrangement according to claim 4 and claim 2 or 3, characterized in that the heat collector ( 24 ) and the heat spreader ( 32 ) by means of at least one heat conductor ( 34 ) are interconnected. Filter arrangement according to one of claims 1 to 5, characterized in that a filter medium of the filter device ( 12 ) Activated carbon ( 30 ). Method for heating a filter device ( 12 ), in particular for a vehicle, in which the filter device ( 12 ) stores gaseous emissions of a fuel supply device, characterized in that for heating the filter device ( 12 ) thermal energy of an exhaust gas into the filter device ( 12 ) is introduced.

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