DE102008020213A1 - Exhaust gas treatment device for motor vehicle, has nitrogen oxide-reducing catalyst, preferably silicon-controlled rectifier catalyst, and feeding device for urea with urea container containing urea - Google Patents

Abstract

The exhaust gas treatment device has a nitrogen oxide-reducing catalyst, preferably a silicon-controlled rectifier catalyst, and a feeding device for urea with a urea container (26) containing the urea. A filling nozzle extends into a wheel chamber (15) below a wheel housing (14) of a vehicle. Urea reservoir particularly urea refilling container is connected with the filling nozzles for filling the urea container. An independent claim is included for a method for filling urea into a urea container of a motor vehicle.

Description

The The invention relates to an exhaust gas purification device for a motor vehicle according to the preamble of the claim 1, a motor vehicle and a method for filling a Urea container of an exhaust gas purification device.

In motor vehicles, an exhaust gas purification device with a technique known as SCR technology (SCR: selective catalytic reduction) is used in the exhaust gas system. This is an exhaust aftertreatment to reduce nitrogen oxides is performed. The SCR technology uses ammonia (NH ₃ ) as a reducing agent, which is obtained in the exhaust gas purification device of the motor vehicle from urea, for converting the nitrogen oxides in a NOx catalyst into nitrogen and hydrogen. The urea may in this case be present in solid form, for example as granules or pellets, or in liquid form as an aqueous urea solution. A highly pure, water-clear, synthetically produced 32.5% urea solution known under the brand name AdBlue (US Pat. DIN 70070 / AUS32 ) is marketed and used. Urea is odorless, non-toxic and biologically harmless. Urea is inexpensive to produce, since it is industrially produced on a large scale and is used for example as a fertilizer in agriculture or as a moisture binder in the cosmetics industry.

Of the Urea is preferably in a urea container entrained in the motor vehicle and usually by means of a metering device to form a urea aerosol in introduced a carrier gas flow and in this way before the NOx catalyst introduced into the exhaust system.

Of the Urea stock in the urea container is then determined in certain Time intervals, for example as part of maintenance cycles, through a filling opening of the urea container refilled.

Out the 10 2005 009 686 A1 is a method and an apparatus for Exhaust gas aftertreatment in diesel engines known. The device has a NOx catalyst, which is of the urea SCR type, and close to the engine is arranged. The SCR catalyst works with urea, resp. with an aqueous urea solution as a reducing agent, which taken from a arranged in the rear of the vehicle urea tank and injected into the exhaust line before the SCR catalyst.

Currently are generally two methods of filling the urea container discussed and are known: the filling through the interior and the filling through the fuel filler flap of the motor vehicle. The first procedure is cumbersome and leads odor nuisance in the passenger compartment and the second procedure requires major design changes with respect to the bodywork of the motor vehicle and a larger one Fuel filler flap.

The Object of the present invention is a urea container to build and integrate into a motor vehicle that this be refilled from outside the vehicle can.

The Task is according to the invention with the features of the independent claims.

The Exhaust gas purification device according to the invention for a motor vehicle has a nitrogen oxide reducing catalyst, preferably an SCR catalyst, and a urea feed device on. The supply means has a, the urea receiving Urea container on. The urea container has a filling nozzle on, in the assembled state of the urea container in the motor vehicle in a wheel space protrudes below a wheel arch of the motor vehicle, so a Urea refill container can be introduced into the wheel space and connectable to the filling nozzle. The urea container is preferably arranged laterally next to the wheel space, preferably at the level of the tire. The urea container is preferred arranged between the front and rear tires, so the filling nozzle can protrude into the wheel space and at the same time a gradient between a connection opening for a urea refill container and having the urea container. The wheelspace of a motor vehicle has a relatively large space above the wheel, in the urea refill container einbringbar is when the vehicle is at rest, so does not drive. This is for example when refueling with fuel or at a routine maintenance of the vehicle the case. For example, if the vehicle is on a lift, the tires are at a lower stop and the space above of the wheel is even larger, so the urea refill container, For example, a refill bottle, just in the Radadtraum can be brought and connected to the filling nozzle. The advantage here is that the filling of the urea container Can be done from outside the vehicle.

Of the Urea may be in liquid form, preferably as 32.5% Urea solution, in the urea container in the Urea refill containers are present and in the Urea containers are filled. The urea but also in the solid state, as so-called pellets or in the form of granules in the urea refill container available. This can then be filled in the urea container are dissolved and by means of a liquid be before this then, preferably as an aerosol, the exhaust gas purification device is supplied.

urea is within the meaning of the invention for any, usable Reducing agent or precursor of a reducing agent for the reduction of Nitrogen oxides, which introduced before the NOx catalyst in the exhaust line becomes. Further, urea container is exemplified every container that absorbs the reducing agent serves.

In an embodiment of the exhaust gas purification device protrudes the filling nozzle into the rear wheel space, with the urea tank preferably in the immediate vicinity of the rear wheel arch is arranged. This is the urea container in the Near the exhaust line, and thus arranged the catalyst and the lines between the urea container and a Place where the urea is introduced into the exhaust line can be short. Preferably, the filling nozzle protrudes into a Wheel space in the rear left of the vehicle.

In a preferred embodiment of the exhaust gas purification device has the filling nozzle a first rectilinear partial element and a second angled, substantially to the first sub-element vertically extending partial element. The angled subelement has the opening for filling the urea and can preferably closed with a cap become. When filling the urea refill container, For example, a refill bottle, to the angled Part of the filling nozzle connected. This For example, by means of a bayonet connection or a Rotary connection done. The refill bottle in the assembled State is substantially perpendicular to the straight subelement aligned, wherein the opening of the angled sub-element is oriented upward so that the urea from the urea refill container flow into the filling nozzle (with liquid Urea) or slip (in case of granules) can. Preferably the rectilinear part element of the filling neck Slope on, so that the urea just in the urea container can get.

In a further preferred embodiment of the exhaust gas purification device the urea container has a filling opening on, in which the rectilinear part element of the filling nozzle is arranged, wherein the rectilinear element in the filling opening is rotatably arranged. This is the location of the filling nozzle relative to the filling container is changeable. For example, the refill bottle in a cheap to be screwed on screwing position and the filling nozzle can then be rotated so as to open the angled Align sub-element upwards and in this way a slope between the refill bottle and the rectilinear subelement to realize the Befüllungsstutzens. This may be due to space limitations and handling reasons be advantageous.

In a further preferred embodiment of the exhaust gas purification device the urea container has a filling opening on, in which the rectilinear part element of the filling nozzle is arranged, wherein the rectilinear part element fixed to a Container wall of the urea container is connected. The opening of the angled subelement is hereby essentially obliquely oriented upward, so a Slope between the opening and the refill bottle is available. A firm connection between filler neck and container wall has fewer moving parts and is therefore less maintenance-prone.

In a further preferred embodiment of the exhaust gas purification device is the rectilinear part element of the filling nozzle formed as a substantially cylindrical tube. This is realized a simple geometry, and it can be standard components be used. The filling nozzle with the rectilinear Sub-element and the angled sub-element produced by bending the tube become. In the embodiment in which the filling nozzle is turned in the filling opening, this is by the rotation of the tube in a circular filling opening easy to realize.

In a further preferred embodiment of the exhaust gas purification device is the rectilinear part element of the filling nozzle fixable in the filling opening. It can be up this way prevents the rotatable rectilinear subelement relocated during the filling and / or into the urea container slips in after the desired Position or position of the filling nozzle set is.

The Task is further by a motor vehicle with an inventive Emission control device solved. The filling of the urea container may be from outside the Motor vehicle done. The space in the wheelhouse is advantageously for accommodating the filling nozzle of the urea container used.

The object is achieved by a method for filling urea in a urea container, which is installed in a motor vehicle. The urea container with a filling nozzle is preferably installed in the immediate vicinity of a arranged below a wheel arch of the motor vehicle and a to be connected to a urea refill container first sub-element of the filling nozzle protrudes into the wheel chamber, wherein the urea refilling container when filling with a second, substantially perpendicular to the first part element extending Sub-element is connected and the urea refilling container is inserted between the wheel arch and the side part in the wheel space.

in this connection The wheelhouse is preferably a rear wheel arch. When filling the tire of the motor vehicle is preferably in the lower stop. This can be realized when the motor vehicle, for example located on a lift. This creates a larger one Space between body and wheel, more precisely above the wheel. alternative The tire can also be removed for filling.

advantageous Further developments and refinements of the exhaust gas purification device, of the motor vehicle and the method emerge from the dependent Claims.

following The invention will be more apparent from the figures of the drawing described that make up regardless of the summary in the claims further features, details and advantages of the invention.

It demonstrate:

1 a perspective view of a section of a motor vehicle with mounted urea container, which has a first embodiment of a Befüllungsstutzens;

2 the same section of 1 with mounted refill bottle;

3 a sectional view of the section of 1 and 2 .

4 shows a sectional view of the same section as in 3 showing two positions of the refill bottle,

5 a perspective view of the same section as in 1 but with a second embodiment of the urea container;

6 a perspective view of 5 with mounted refill bottle;

7 a sectional view of the section of 4 and 5 with mounted refill bottle.

1 shows a motor vehicle 10 with an exhaust gas purification device, wherein of the motor vehicle 10 only the left-hand area of the body 12 is shown. The bodywork section includes a wheel arch 14 , In a wheelspace 15 below the wheelhouse 14 is a tire 16 is arranged. The mature 16 is in a first position in the lower stop, the first position as a stop position 18 is designated, for example, when the vehicle is on a lift. A second, as a driving position 20 designated position of the tire is also shown. The mature 16 is on a wheel suspension 22 on the chassis 24 of the motor vehicle 10 suspended.

Of the exhaust gas purification device is a urea container 26 shown in the urea in the motor vehicle 10 is carried. The urea container 26 is in the immediate vicinity of the wheelhouse 14 on the ground 28 the body 12 arranged. The urea container is preferred 26 sideways from the tire 16 , essentially at height, relative to the bodywork 12 , the tire 16 arranged. The urea container 26 is particularly on a connecting line between the front (not shown) tire and the rear tire 16 arranged. The urea container 26 has a container casing enclosing a container interior 30 on. The container jacket 30 has a container bottom wall 32 , four container side walls and a container top wall 34 on. Of the container sidewalls, the container sidewall 36 and the container sidewall 38 in the 1 recognizable. At an edge 40 between the container sidewall 38 and the tank top wall 34 is a filling opening 42 arranged. In the in 1 illustrated embodiment is a in the filling opening 42 rotatable filling nozzle 44 arranged. The filling nozzle 44 has a rectilinear sub-elements 46 and a second angled substantially perpendicular to the rectilinear subelement 46 running subelement 48 on. This subelement 48 is also called an angled subelement 48 designated. The subelement 48 has an opening for filling the urea container 26 on, wherein the angled subelement 48 shown in the figure as having a closure cap 50 is shown closed.

Because of the urea container 26 in the area of the bodywork, which is below the rear door of the motor vehicle 10 is arranged, it is possible that the filling nozzle 44 in the rear wheelspace 15 protrudes and can be filled from the outside.

In 1 are two positions of the filling nozzle 36 shown by turning the first sub-element 46 relative to the urea container 26 are feasible. The first position becomes with connection position 52 denotes and serves to connect a refill bottle, not shown for filling the urea container 26 , A second, with the reference number 54 designated position of the filling nozzle 44 is done by turning the first part element 46 realized in one direction upwards, so that a gradient can occur in the refill bottle.

2 shows the same section of the motor vehicle 10 as in 1 , Like parts are given the same reference numbers as in 1 Mistake. The urea container 26 is about the second subelement 48 of the filling nozzle 44 with a refill bottle 56 connected in the first position 52 as well as in the second position 54 is shown. With 58 designated axis illustrates the axis of rotation around which the first sub-element 46 relative to the urea container 26 is rotatable. It can be seen that when the tire 16 in the stop position 18 is, enough space for mounting the refill bottle 56 at the filling nozzle 44 is available. When the motor vehicle is jacked up, the refill bottle can 56 horizontally to the angled subelement 48 be attached and attached to this, for example, be screwed and so with the filling nozzle 44 get connected. 3 shows a sectional view of the detail of the motor vehicle 10 that in the 1 and 2 is dargstellt. Same items are denoted by the same reference numerals as in the 1 and 2 and to that extent the description of the 1 and 2 directed. The cut is in the plane parallel to the vehicle floor 28 at the level of the refill bottle 56 placed. The mature 16 is in the driving position 20 shown. The refill bottle 56 is in position 52 shown in this on the second subelement 48 of the filling nozzle 44 is screwed on. With the reference number 60 the damper is shown in the upper stop. It can be seen that by turning around the axis 58 , the refill bottle, 56 in the position 52 is arranged substantially horizontally, is turned out of the horizontal plane. Thus arises in the refill bottle 56 a gradient, so one in the refill bottle 56 located liquid or granules from the refill bottle in the filling nozzle 44 can enter and so in the urea container 26 ,

4 shows a sectional view of the detail of the motor vehicle 10 that in the 1 . 2 and 3 is dargstellt. Same items are denoted by the same reference numerals as in the 1 . 2 and 3 referred and in this respect reference is made to the description of the figures. The presentation in the 4 is turned 90 degrees to the right. The refill bottle 56 is in the first position 52 and in the second position 54 shown. Here, the rotation of the axis 58 of the second subelement 48 of the filling nozzle 44 in the illustrated embodiments 45 ° to the right, so that an opening 57 the refill bottle 56 down in the direction of the body floor 28 shows. It is also possible to rotate through an angle greater than 45 °. However, the angle should preferably be at least 45 °, since at angles of less than 45 °, the resulting gradient in the refill bottle 56 is too small to urea in the filling nozzle 44 to transport.

5 shows the motor vehicle 10 with another embodiment of the urea container 26 , Since it is another embodiment but functionally identical parts, all reference numerals concerning the urea container are provided with a leading digit "1". The urea tank, which is in the 1 to 3 with the reference numbers 26 is thus designated by the reference numeral 126 Mistake. The parts that the motor vehicle 10 are given the same reference numerals as in the 1 to 3 designated.

The urea container 126 is in the immediate vicinity of the wheelhouse 14 on the ground 28 the body 12 arranged. The urea container is preferred 126 sideways from the tire 16 , essentially at height, relative to the bodywork 12 , the tire 16 arranged. The urea container 126 is particularly on a connecting line between the front (not shown) tire and the rear tire 16 arranged.

The urea container 126 has a filling opening 142 on, in the one fixed to the container shell 130 connected filling nozzle 144 is arranged. The filling nozzle 144 has a first subelement 146 and a second subelement 148 on. The second subelement 148 is substantially perpendicular to the first sub-element 146 arranged. The second subelement 148 has an opening which in the illustration of 4 with a cap 150 is closed.

6 shows the same section of the motor vehicle 10 with screwed refill bottle 156 , The refill bottle 156 shows diagonally upwards and thus has a slope for the contents of the refill bottle 156 on. Because the filling nozzle 144 rigid with the urea container 126 connected and thus can not be rotated, the urea bottle must 156 between a side part of the body 12 and the wheelhouse 14 be threaded for screwing.

7 shows a sectional view in a plane of the screwed refill bottle 156 , Recognizable is from top to bottom, along the arrow 160 Seen the lower limit of the bodywork 12 which is the upper boundary of the wheel arch 14 is, underneath, the refill bottle 156 and underneath the tire 16 in the driving position 20 as well as in the position 18 of the lower stop. The urea container 126 is not shown in this illustration. The arrow 162 refers to the dimension of the installation space in the wheel arch 14 for unscrewing the refill bottle 156 , It is clear that for this embodiment of the urea container 126 with rigidly connected filling nozzle 144 the vehicle 10 at least partially jacked up. The mature 16 must be in the lower limit, otherwise the space is insufficient to fill the refill bottle 156 screwed. Preferably, the motor vehicle 10 spent on a lift and the refill bottle 156 can then be slanted from the bottom between the side wall of the body 12 and the wheelhouse 14 be threaded and screwed on.

The attachment of the refill bottle 56 . 156 is merely exemplified with screwing, it is also possible this only aufzustecken or otherwise a tight connection between the refill bottle 56 . 156 and the second subelement 48 . 148 of the filling nozzle 44 . 144 to accomplish.

In the process of filling, the procedure is as follows: The end cap 50 . 150 on the second subelement 48 . 148 of the filling nozzle 44 . 144 is removed first. Preferably, the vehicle is 10 at least partially jacked up so that the tire 16 is in the lower stop. The refill bottle 56 . 156 is screwed, or with the second sub-element 48 . 148 brought into a tight connection. Here, the refill bottle 56 . 156 have a slope above their bottle height, so that the urea in the filling nozzle 44 . 144 and into the urea container 26 . 126 can get. This is in the first embodiment ( 1 to 4 ) of the urea container 26 achieved by the filling nozzle 44 in the filling opening 42 is turned after the refill bottle 56 on the filler neck 44 is attached. This is the filling nozzle 44 turned so that the second subelement 48 pointing upwards. In the second embodiment, in the 5 to 7 is shown, is the filling nozzle 144 rigid with the urea container 126 connected in such a way that the second sub-element 148 and the refill bottle 156 a common longitudinal axis 164 which is inclined, preferably at 45 ° to the horizontal, so that the contents of the refill bottle 156 due to the gradient down into the filling nozzle 144 can flow (with liquid urea), or slip (urea in the form of granules).

The foregoing description of the process of filling has been made using a urea refill container 56 . 156 , in particular using the refill bottle described. This is only an example. Of course, instead of the refill bottle and a hose with a on the second sub-element 48 . 148 suitable connection element can be used, which corresponds to the sub-element 48 . 148 of the filling nozzle 44 . 144 is connected. The refill container may be a larger, somewhat remotely located urea refill container.

10

motor vehicle

12

body

14

wheelhouse

15

bike room

16

tires

18

first position of the tire 16 Stop position, position in the lower stop

20

second position of the tire 16 , Driving position

22

Arm

24

chassis

26

urea tank

28

body floor

30

Urea container jacket, container jacket

32

Tank bottom wall

34

Tank top wall

36

Container sidewall

38

Container sidewall

40

edge between tank base wall and tank top wall

42

filling opening

44

filling adapters

46

first, rectilinear subelement of the filling nozzle 44

48

second angled subelement of the filling nozzle 44

50

cap

52

first Position, screw-on position

54

second Position, filling position

56

Harnstoffnachfüllbehälter, refill

58

axis

126

urea tank

142

filling opening

144

filling adapters

146

first sub-element of the filling nozzle 144

148

second sub-element of the filling nozzle 144

150

cap

156

Harnstoffnachfüllbehälter, refill

160

arrow

162

arrow

164

longitudinal axis

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 non-patent literature

• - DIN 70070 / AUS32 [0002]

Claims (12)

Exhaust gas purification device for a motor vehicle ( 10 ), which comprises a nitrogen oxide reducing catalyst, preferably an SCR catalyst, and a urea feed device with a urea receptive urea container ( 26 . 126 ), characterized in that the urea container ( 26 . 126 ) one relative to the urea container ( 26 . 126 ) movable or rigid filler neck ( 44 . 144 ), which is in a wheel space ( 15 ) below a wheel arch ( 14 ) of the motor vehicle ( 10 ) and that for filling the urea container ( 26 . 126 ) a urea reservoir, preferably a urea refill container ( 56 . 156 ) with the filling nozzle ( 44 . 144 ) is connectable. Exhaust gas purification device according to claim 1, characterized in that the wheel arch ( 14 ) is a rear wheel arch and the urea tank ( 44 . 144 ), preferably in close proximity to the rear wheel arch ( 14 ) is arranged. Exhaust gas purification device according to claim 1 or 2, characterized in that the filling nozzle ( 44 . 144 ) a first, subelement ( 46 . 146 ) and a second partial element angled relative to the first partial element ( 48 . 148 ) having. Exhaust gas purification device according to claim 2 or 3, characterized in that the urea container ( 44 ) a filling opening ( 42 ), with which the first subelement ( 46 ) of the filling nozzle ( 44 ), the first subelement ( 46 ) relative to the urea container ( 44 ) is movable, preferably rotatably arranged. Exhaust gas purification device according to claim 2 or 3, characterized in that the urea container ( 144 ) a filling opening ( 142 ), with which the first subelement ( 146 ) of the filling nozzle ( 144 ) is rigidly connected. Exhaust gas purification device according to claim 4 or 5, characterized in that the rectilinear subelement ( 46 . 146 ) of filling support ( 44 . 144 ) is formed as a substantially cylindrical tube. Exhaust gas purification device according to claim 5, characterized in that the rectilinear subelement ( 46 ) of the filling nozzle ( 44 ) in the filling opening ( 42 ) is fixable. Motor vehicle with an emission control device according to one of claims 1 to 7. Method for filling urea into a urea container ( 26 . 126 ) of a motor vehicle ( 10 ), characterized in that the urea container ( 26 . 126 ) a projecting into a wheelbase of a wheel arch filling neck ( 44 . 144 ) and for filling the urea container ( 26 . 126 ) a urea reservoir, preferably a urea refill container ( 56 . 156 ) with the filling nozzle ( 44 . 144 ) is connected. A method according to claim 9, characterized in that a with a urea refill container ( 56 . 156 ) to be connected first sub-element ( 46 . 146 ) of the filling nozzle ( 44 . 144 ) in the wheelspace ( 15 ) below the wheelhouse ( 14 ), the urea refill container ( 56 . 156 ) between the wheelhouse ( 14 ) and the side part in the wheel space ( 15 ) and for filling the urea refill container ( 56 . 156 ) with a second, to the first sub-element ( 46 . 146 ) substantially vertically extending subelement ( 48 . 148 ) is connected Method according to claim 9, characterized in that the wheel arch ( 14 ) a rear wheel arch ( 14 ). Method according to claim 9 or 10, characterized in that the tire ( 16 ) in the state of filling the urea container ( 26 . 126 ) in the stop position ( 18 ).