DE102010049988A1 - Shut-off device for drive of vehicle i.e. passenger car, has determination unit for determining road performance under estimation of driving scenario, where drive is switched-off when substance stock falls below stock threshold value - Google Patents

Abstract

The device (1) has a level measuring device (17) for determining a reduction substance stock (15) located in a reduction material container, where a vehicle drive (3) is automatically switched-off and/or new starting of the vehicle drive is inhibited when the reduction substance stock falls below a stock threshold value and a vehicle achieves allowed Karenz road performance (31). A determination unit (30) determines the road performance under estimation of a prognosticated driving scenario, where the driving scenario is estimated by using information representing driving characteristics. Independent claims are also included for the following: (1) a method for switching-off a vehicle drive (2) a computer program for executing a switching-off method (3) a computer program product for executing a switching-off method.

Description

The invention relates to a shutdown device and a shutdown method for a vehicle drive, which is provided with a reduction device which supplies a reducing substance emitted by the vehicle drive, a reducing substance for lowering a pollutant content of the exhaust gas, and a computer program and computer program product.

The term vehicle drive is in the context of the present invention z. B. to understand an internal combustion engine, in which arise in a combustion process exhaust materials, which also contain pollutants. Pollutants are substances that - if released into the environment, for example - can have a negative or harmful effect on living things, plants and / or property. In order to minimize harmful effects on the vehicle environment (eg an ecosystem), maximum limits (pollutant limit values) for volatile pollutants, eg. As prescribed by regulations or laws. An example of such a rule is the Euro 5 emissions standard.

To lower the pollutant content, the exhaust gas emitted by the vehicle drive can be supplied with a reducing agent. In this case, chemical reactions between the reducing agent and the exhaust gas z. B. initiated or accelerated when penetrating a catalyst.

An example of such a reducing agent z. For example, for use in diesel internal combustion engines is so-called urea (lat. Urea) or ammonia for reducing the proportion of nitrogen oxides in the exhaust gas.

The German publication DE 10 2007 034 822 A1 is a method for controlling a regeneration operation of a pollutant catalyst or particulate filter of an exhaust system in a motor vehicle with internal combustion engine refer. The method comprises an intermediate regeneration operation for the pollutant catalyst or particulate filter, detection of at least one operating parameter of the vehicle, a plurality of activation rules for the activation of the regeneration operation as a function of the detected operating characteristic and a plurality of deactivation rules, which are predetermined for a deactivation of the regeneration operation. To activate the regeneration mode, activation rules are selected as a function of acquisition of operating parameters. The operating parameters of the exhaust gas system detected for controlling the regeneration operation are, for example, the thermal state of a urea SCR (SCR: Selective Catalytic Reduction) - ie a unit for the catalytic reduction of the pollutant content in the exhaust gas - as well as its ammonia filling.

The invention has for its object to provide a shutdown device and a shutdown method for a vehicle drive, in which a (legally prescribed) shutdown of the vehicle drive in the absence of reducing agent adapted to the situation and takes place with the least possible damage to the vehicle occupants.

This object is achieved with respect to the device by a shutdown device with the features of claim 1 and in terms of the method by a shutdown with the features of claim 9.

Accordingly, a shutdown device for a vehicle drive is provided, which is provided with a reduction device which supplies a reducing substance emitted by the vehicle drive a reducing agent for lowering a pollutant content of the exhaust gas, the shutdown determines the existing reduction stock and automatically shuts off the vehicle drive and / or restart the A vehicle drive inhibits when the reduction stock has fallen below a stock limit and after the vehicle has provided a still-approved no-show performance, wherein a determination unit determines the remaining allowance by evaluating a predicted driving scenario.

An essential advantage of the invention is in the adapted to the needs and intentions of the vehicle occupants shutdown of the vehicle drive -. B. to comply with legal regulations -, with the shutdown associated inconvenience to the vehicle occupants are minimized. In this case, for example, a shutdown of the vehicle drive in particularly unfavorable situations - such. B. in a place that is unfavorable for the replenishment of reducing agent, or while driving - prevented.

The determination of the existing reduction stock can be done differently. It is conceivable, for example, to determine the reducing agent supply via a fill level measuring device which determines the fill level of the reducing agent in a reducing agent reservoir.

The automatic shutdown of the vehicle drive can take place when the vehicle has reached, for example, a parking space or another suitable for automatic shutdown suitable location, preferably the hometown. For this purpose, a navigation device can determine the position of the vehicle and recognize whether the vehicle z. B. reaches the end of the free-time driving a parking space. In this case, restarting the vehicle drive after the automatic switch-off is preferably also prevented.

The imminent or acute shutdown of the vehicle drive and / or the inhibition of restarting the vehicle drive may be in conjunction with a driver signal warning so that it does not signal the behavior of the vehicle drive as malfunctioning or, for example, the shutdown of the vehicle drive due to the lack of fuel , The stock limit value can correspond to a predetermined residual quantity of the reducing substance or else to the value zero.

For example, in the context of the present invention, the term parental leave service is a parental service duration - d. H. a predetermined remaining remaining operating time of the vehicle - or to understand a Karenzfahrstrecke.

The predicted driving scenario, for example, include a driving project of the driver, which z. B. is forecast under evaluation of past driving project of the driver. In this case, additionally occurring traffic volumes, such as traffic jams, can be predicted and included in the forecast of the driving scenario. In particular, a travel route to be covered for the driving project can be included in the predicted driving scenario.

Further details, aspects and advantages of the invention are the subject of the dependent claims, the drawings and their respective description.

In an advantageous embodiment of the invention, the determination unit enforces an input or confirmation of an intended driving behavior by the driver. As a result, switching off and / or stopping the restart of the vehicle drive can be carried out in a particularly situation-adapted manner. The driver can to enter his intended driving or driving, for example, via an operating unit, the predicted driving scenario can be adapted to the input of the driver. It is also conceivable that information is displayed to the vehicle driver that represents the forecasted driving scenario and / or the no-show driving performance. Then the driver can confirm the driving behavior included in the driving scenario and thus, in interaction with the determining unit, also influence the determination of the waiting mileage or confirm a determined waiting mileage. As a result, the determined parental leave performance is additionally adapted to the needs of the driver.

It is conceivable for the vehicle driver to input information into a navigation device that represents a current destination, wherein the navigation device determines the route to the destination and wherein determining the parental leave performance taking into account the route. When using a present in the vehicle navigation device for entering a current destination the parental leave performance is determined particularly appropriate and adjusted to the driver's need to achieve a desired goal yet, with the greatest possible tolerance.

The navigation device may be a navigation system already present in the vehicle, which determines the current geographical position of the vehicle on the basis of stored map data and evaluation of, for example, a GPS signal (Global Positioning System) and also determines a route to a predefined or a destination entered by a driver ,

The determination unit can now z. B. decide whether the route to be covered is still within the allowance period and thus allowed to be covered by the vehicle. If the route is, for example, a comparatively long and long drive, the still permissible waiting mileage can be set to zero, so that a restart of the vehicle drive is prevented and the route can not be started. It is also conceivable that a predetermined intermediate stop is located on the route, which is particularly suitable for switching off the vehicle drive and at which the journey is to be terminated. In this case, the waiting mileage can be set such that the said stopover is achieved.

It may be provided an information device that informs the driver about supply options for the reducing agent. The vehicle driver thus receives valuable assistance in being able to replenish the reducing agent in good time. The possibilities of obtaining the reducing substance may be places where the reducing substance is available, such as: B. petrol stations.

The determination of the parental leave mileage can take place, for example, taking into account a supply source for reducing agent lying on the travel route. As a result of this refinement, a waiting mileage is determined to be correspondingly large so that a location on the travel route for filling reductant can be reached. This location can be, for example, directly on the route or be reached by a small compared to the route of the entire route detour. The place may be, for example, a gas station or a commercial Equipment for the sale of reducing agent. The automatic shutdown of the vehicle drive can be done in particular when the vehicle has reached the place for the filling of reducing agent. A restart of the vehicle drive can be prevented at this location until reducing material has been replenished.

The determination of the parental leave performance, for example, taking into account a driver-side confirmation done that this controls the source. As a result, the no-frills mileage is given additional importance in that it is especially optimized for the needs of the driver. In addition, the confirmation increases the predictive certainty that the driver actually drives the reductant supply source and replenishes reducing agent there. This gives the parental mileage additional security with respect to a favorable for the vehicle occupant determination and also increases the acceptance of the shutdown device with users of the vehicle. If there is no replenishment of reducing agent at the location, a restart of the vehicle drive by the shutdown device can be prevented.

According to a further advantageous embodiment of the invention, a storage device provides information representing at least one previous driving behavior, wherein the forecast of the driving scenario takes place taking into account the information. This represents a particularly intelligent form of forecasting of the driving scenario that is independent of an interaction of the driver. For the prognosis, mathematical prognosis methods can be used which evaluate information and data on previous driving behavior stored in the memory device and, based on this, a prognosis for an expected driving scenario (For example, a future driving behavior of the driver) and / or create a route.

The prediction method may be, for example, a method based on artificial neural networks or a prediction model created from a regression analysis.

The past driving behavior can be characterized, for example, by at least one past parking location whose geographical information is determined by a navigation device and provided by the storage device. In addition, the navigation device can determine a home location of the vehicle, so that the prognosis of the driving scenario taking into account the home location or earlier approaches of the home town as a past driving behavior. The term home word of the vehicle is in the context of the present invention, for example, the residence of the driver or a place to understand where the vehicle frequently or regularly z. B. is turned off overnight. The automatic shutdown of the vehicle drive can take place, for example, when the vehicle has reached its home location. For this purpose, the position of the vehicle can be determined via the navigation device and, in addition, recourse can be made to earlier stopping places and their frequency can be determined. If the vehicle reaches z. B. at the end of a parental leave a frequently used for parking place (the home car park), the vehicle drive is switched off there at already or shortly reached parental power.

In addition, the period between the last stop and the next restart of the vehicle drive can be taken into account as a past driving behavior for the forecast. For example, several time periods can be stored and statistically evaluated in order to predict the next trip start or the next parking of the vehicle by the driver.

The forecast of the driving scenario can take place, for example, taking into account the current calendar time. Thereby, the shutdown of the vehicle drive and / or the prohibition of restarting can be performed on predetermined calendar days, if these are particularly favorable for the general use of the vehicle. Accordingly, the shutdown of the vehicle drive and / or the prevention of a restart on other specified calendar days can also be prevented. A practical application case is, for example, a situation in which the vehicle drive is switched off on reaching a location for filling reductant on a Sunday and / or holiday. There is a risk that fuel will not be available at the location on Sundays and public holidays - eg. Due to the business hours of the location located at the location (eg gas station) - so that the shutdown of the vehicle drive on this calendar day is particularly unfavorable for the vehicle occupants. Taking into account the current calendar time, the shutdown of the vehicle drive on Sundays and holidays can then be prevented, for example, or worked with a higher tolerance in the evaluation of the predicted driving scenario.

In addition, the past driving behavior can be used to conclude a specific driving project or driving scenario on a specific calendar day or at a specific calendar time. For example, if the vehicle is frequently used for a route at certain times of the calendar or on certain calendar days this can be taken into account when forecasting the driving scenario or when evaluating it.

In a further preferred refinement of the invention, the device issues an initial warning to the vehicle driver as soon as the reducing agent stock has reached a predetermined minimum distance from the stock limit value and / or has reached the stock limit value. This makes it possible for the driver to respond in good time, for example, by immediate filling of reducing agent. Also conceivable are other warnings that occur in chronological succession, z. B. before the reductant stock has reached the stock limit.

• a) der vorhandene Reduktionsstoffvorrat ermittelt wird,
• b) wobei der Fahrzeugantrieb automatisch abgeschaltet wird und/oder ein Neustart unterbunden wird, wenn der Reduktionsstoffvorrat einen Vorrat-Grenzwert unterschritten hat und nachdem das Fahrzeug eine noch zugelassene Karenz-Fahrleistung erbracht hat,
• c) wobei die Karenz-Fahrleistung unter Bewertung eines prognostizierten Fahrszenarios festgelegt wird.

The shutdown method according to the invention for a vehicle drive, which is provided with a reduction device which supplies a reducing substance emitted by the vehicle drive, a reducing substance for lowering a pollutant content of the exhaust gas, provides that

• a) the existing reduction substance stock is determined,
• b) wherein the vehicle drive is automatically switched off and / or a restart is inhibited if the reducing agent stock has fallen below a stock limit and after the vehicle has provided a still-approved no-claims driving performance,
• c) where the parental mileage is determined by evaluating a predicted driving scenario.

This is a particularly simple and adapted to the needs of the vehicle occupant method specified by the statutory requirements for timely shutdown of a vehicle drive in the absence of reduction material are met and at the same time the shutdown takes place in favorable for a driver situations. The driver is also granted a temporal and local scope for the filling of reducing agent.

In this case, the input or confirmation of an intended driving behavior can be forced by the driver and thus the predicted driving scenario, taking into account an intended driving behavior in an expedient manner more accurately and with increased safety and forecasts a corresponding driving performance in coordination with a driver with regard to its needs and driving the Operation of the vehicle are set.

According to an advantageous embodiment of the shutdown method, an input or confirmation of an intended driving behavior is enforced by the driver. As a result, the shutdown of the vehicle drive can be made particularly adapted to the situation. It is conceivable that information is displayed to the vehicle driver that represents the predicted driving scenario and / or the no-show driving performance. Then the driver can confirm the driving behavior included in the driving scenario and thus, in interaction with the determining unit, also influence the determination of the waiting mileage or confirm a determined waiting mileage. As a result, the determined parental leave performance is additionally adapted to the needs of the driver.

• a) gibt der Fahrzeugführer Informationen in eine Navigationseinrichtung ein, die ein aktuelles Fahrtziel repräsentieren,
• b) wobei eine Fahrtroute bis zum Fahrtziel ermittelt wird und
• c) wobei die Karenz-Fahrleistung unter Berücksichtigung der Fahrtroute festgelegt wird.

In another preferred embodiment of the shutdown method

• a) the driver inputs information into a navigation device that represents a current destination,
• b) wherein a route to the destination is determined and
• c) where the parental mileage is determined taking into account the route.

After the driver indicates a destination and the navigation device determines a route to the destination, the parental mileage can be set in a particularly simple and advantageous manner. Taking into account the route, it is also decided whether this waiting mileage includes repositioning the route. This may mean, for example, that the waiting mileage is set to the value zero when a destination is entered and from this a route is determined, which, for. B. can not expect a timely replenishment of reducing agent.

According to a further expedient embodiment of the switch-off method, the waiting mileage is set taking into account a supply source for reducing agent lying on the travel route. Thus, a driver is given the opportunity to approach the place located on the route within the waiting mileage to perform the filling of reducing agent.

According to another advantageous embodiment of the invention, the waiting mileage is determined taking into account a vehicle driver side confirmation that it controls the source. As a result, the driver can obtain by confirmation a comparatively longer waiting mileage for the vehicle, if it controls the location for the filling of reducing agent. If the driver does not confirm the driving of the location, the waiting mileage can be set substantially lower, for example with an operating time of zero, so that the vehicle drive is switched off immediately or a restart is prevented.

• a) werden Informationen von einer Speichereinrichtung bereitgestellt, die zumindest ein früheres Fahrverhalten repräsentieren,
• b) wobei das Fahrszenario unter Berücksichtigung dieser Informationen prognostiziert wird.

In a further advantageous embodiment of the shutdown method according to the invention

• a) information is provided by a memory device that at least represent an earlier driving behavior,
• b) wherein the driving scenario is predicted taking into account this information.

This has the advantage that particularly intelligent and, for example, self-learning mathematical methods independent of the interaction with the driver can be used for the prognosis of the driving scenario.

According to a further particularly expedient embodiment of the shutdown method according to the invention, the driving scenario is predicted taking into account the current calendar time. As a result, for example, calendar-time-dependent driving habits or situations that occur as a function of specific calendar times and calendar days can be taken into account.

In another advantageous embodiment of the shutdown method according to the invention, an initial warning is issued to the vehicle driver as soon as the reduction substance supply is within a predetermined minimum distance from the stock limit value and / or has reached the stock limit value. About the initial warning, the driver is informed of an expected lack of reducing agent and can be based on this information according z. B. react by obtaining and refilling reducing agent.

The invention manifests itself in a computer program according to the invention which carries out the steps of the method according to the invention when it is executed on a computer, in particular a control unit of a vehicle drive. The embodiment as a computer program has the advantage that the method can be easily implemented -. B. by programming an already existing in the vehicle control unit for the vehicle drive.

The computer program product according to the invention comprises means for carrying out the steps of the method according to the invention, wherein the means are designed as program code and set up such that the method is carried out when the program code is loaded into a main memory and at least one processor of a computer, in particular a control unit of the vehicle drive , is performed.

The invention will be further explained by way of example with reference to a drawing. The same or functionally identical elements are provided with the same reference numerals in the figures. Show it:

1 a shutdown device according to the invention in a vehicle,

2 schematically the operation of a shutdown device according to the invention and

3 schematically the course of the method according to the invention.

1 shows a shutdown device according to the invention 1 in a vehicle 2 with a vehicle drive 3 that is an internal combustion engine 4 includes. From the internal combustion engine 4 becomes an exhaust 5 delivered, the pollutants 6 Contains a pollutant content 7 of the exhaust gas 5 form. A reduction device 8th leads from the vehicle drive 3 discharged exhaust gas 5 a reducing agent 9 z. B. by means of an injector 10 to. On the way to an opening 11 a vehicle exhaust 12 becomes a chemical reaction between reducing agent 9 and exhaust 5 initiated by the pollutant content 7 of the exhaust gas 5 is lowered. The reaction rate is determined by an outflow direction of the exhaust gas 5 seen below and in the exhaust pipe 13 arranged catalyst 14 accelerated.

The shutdown device 1 determines a reduction substance stock 15 that is in a reducing agent tank 16 located, by means of the level measuring device 17 , Once the determined reduction stock 15 a predetermined minimum distance 18 to a stock limit 19 has, gives the display device 20 a visually and acoustically perceptible first warning 21 to a driver 22 from. The first warning 21 informs the driver 22 about that the reductant stock 15 at a predetermined minimum distance 18 to the supply limit 19 located. The driver 22 can react accordingly and initiate measures to top up the reducing agent.

If the reducing agent stock 15 the stock limit 19 falls below, determines the investigation unit 30 under evaluation of a predicted driving scenario, a still valid parental mileage 31 , After the still approved parental mileage 31 is provided, the shutdown device turns off 1 the vehicle drive 3 automatically or prevents a restart of the vehicle drive 3 ,

Before the parental mileage 31 is set, forces the discovery unit 30 an input 32 of the driver 22 representing an intended driving behavior and by the operation of a control unit 33 he follows. The forecast of the driving scenario takes into account the input 32 of the driver.

In addition, the driver gives 22 via the operating unit 33 Information in a navigation device 34 which represent a current destination. The navigation device 34 determines thereupon a travel route to be traveled to reach the destination, wherein the setting of the no-show driving performance 31 taking into account the route.

2 shows the shutdown device according to the invention 50 in the vehicle 2 , which is on a route 51 to reach the destination 52 emotional. For better illustration, the vehicle 2 in comparison to the route 51 shown enlarged. It has the in 1 shown determination unit 30 a driving scenario 53 (in 2 marked as a dot-dash line) for the preceding route to be covered 51 predicts. The information device 54 informs the driver 55 about a reference possibility 56 for reducing agent. This reference 56 is one on the route 51 source of supply (eg a gas station) at which reducing agent is available in order to obtain the 1 shown reducing agent tank 16 fill.

When deciding on a no-show mileage 58 For example, as a certificate course 59 becomes the source of supply 57 for reducing agent on the route 51 considered. Additionally, when determining the qualifying mileage 58 a driver-side confirmation 60 in that it controls the source of supply and / or an input of an intended driving behavior 61 (in 2 marked as dash-dot-dot line) of the vehicle driver 55 considered.

In the 1 shown determination unit 30 also determines a current calendar time 62 that in the forecast of the driving scenario 58 is taken into account. In addition, the vehicle points 2 a storage device 63 which provides information which at least an earlier driving behavior 64 represent. The past driving behavior 64 (in 2 marked as dash-dot line) includes, for example, past journeys 65 with different breakpoints 66 and storage areas 67 or shutdown times 68 , The earlier driving behavior 64 is also used in the forecast of the future or future driving scenario 53 considered.

3 schematically shows a possible sequence of the shutdown method according to the invention 70 for a vehicle drive, which is provided with a reduction device which supplies a reducing substance to an exhaust gas emitted by the vehicle drive. The process begins in process step A, in which the available reducing agent stock is determined. In a further method step B, an initial warning is output to the vehicle driver as soon as the reducing agent stock is within a predetermined minimum distance from a stock limit value and / or has reached this stock limit value. In another method step C, an input or confirmation of an intended driving behavior is enforced by the driver. This may mean that the vehicle can not start unless there is an input or confirmation from the driver. In a further optional method step D, the driver enters information into a navigation device that represents a current destination, wherein the navigation device determines in a subsequent method step E a route to be traveled to reach the destination. In a further optional method step F, information is provided by a memory device that represents at least an earlier driving behavior. In addition, the driver is informed in an optional process step G about supply possibilities for the reducing agent. In a following method step H, a still permissible waiting mileage is determined by determining a predicted driving scenario. The optional mileage mileage is also set in an optional method step J, taking into account a place for the filling of reducing agent located on the travel route and a driver-side confirmation that it controls the location for the filling of reducing agent. In addition, in a method step K, the waiting mileage is determined taking into account the determined travel route to be covered to reach the destination, and in a method step L the driving project is predicted taking into account the information provided by the storage device. In addition, in a method step M, the driving scenario is predicted taking into account the current calendar time. In a method step N, the vehicle drive is automatically switched off and / or a restart is prohibited if the reduction substance supply has fallen below a stock limit value and after the vehicle has provided the still-approved no-claims driving performance.

While at least one embodiment is illustrated in at least the summary description and the specific description and drawings, it will be apparent to those skilled in the art that there are a variety of possible variations of the invention. It will also be appreciated that embodiment (s) are intended to be exemplary only and are not intended to limit the scope, applicability, or configuration of the invention in any way. Rather, the general description, the specific description part and the drawings give those skilled in the art a guide that allows him to implement the invention in at least one embodiment, wherein Of course, various modifications may be made in the function and arrangement of the individual elements described in the exemplary embodiment (s) without departing from the scope of the protection claimed by the appended claims and their equivalents.

LIST OF REFERENCE NUMBERS

1

breaking device

2

vehicle

3

vehicle drive

4

internal combustion engine

5

exhaust material

6

pollutants

7

pollutant content

8th

reducer

9

reducing substance

10

injector

11

opening

12

Exhaust

13

exhaust pipe

14

catalyst

15

Reducing fuel stock

16

Reducing fuel tank

17

Level measuring device

18

minimum distance

19

Stock limit

20

display

21

Erstwarnung

22

driver

30

determining unit

31

Leave-road performance

32

input

33

operating unit

34

navigation device

50

breaking device

51

route

52

destination

53

driving scenario

54

information means

55

driver

56

Delivery option

57

source

58

Leave-road performance

59

Parental route

60

confirmation

61

driving behavior

62

Calendar

63

memory device

64

driving behavior

65

routes

66

breakpoints

67

Abstellorte

68

shut-down

70

shutdown

A

step

B

step

C

step

D

step

e

step

F

step

G

step

H

step

J

step

K

step

L

step

M

step

N

step

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007034822 A1 [0005]

Claims (15)

Switch-off device for a vehicle drive ( 3 ) equipped with a reduction device ( 8th ) provided by the vehicle drive ( 3 ) discharged exhaust gas ( 5 ) a reducing substance ( 9 ) for lowering a pollutant content ( 7 ) of the exhaust gas ( 5 ), wherein the shutdown device ( 1 ) the existing reduction stock ( 15 ) and - the vehicle drive ( 3 ) automatically shuts off and / or restarts the vehicle drive ( 3 ), if the reductant stock ( 15 ) a stock limit ( 19 ) and after the vehicle ( 2 ) a still approved parental leave mileage ( 31 . 58 ), - an identification unit ( 30 ) the parental mileage ( 31 . 58 ), evaluating a predicted driving scenario ( 53 ). Switch-off device according to claim 1, - wherein the determination unit ( 30 ) an input ( 32 ) or confirmation ( 60 ) of intended driving behavior ( 61 ) by the driver ( 22 . 55 ) enforces. Switch-off device according to claim 1 or 2, - wherein the driver ( 22 . 55 ) Information in a navigation device ( 34 ) that specifies a current destination ( 52 ), the navigation device ( 34 ) a route ( 51 ) to the destination ( 52 ) and - whereby the determination of the parental leave mileage ( 31 . 58 ) taking into account the route ( 31 . 58 ) he follows. Switch-off device according to at least one of the preceding claims, - a memory device ( 63 ) Provides information that at least reflects an earlier driving behavior ( 64 ) and - whereby the forecast of the driving scenario ( 53 ) taking into account the information. Switch-off device according to at least one of the preceding claims, - wherein the switch-off device ( 1 ) a first warning ( 21 ) to the driver ( 22 . 55 ) as soon as the reduction stock ( 15 ) at a predetermined minimum distance ( 18 ) to the stock limit ( 19 ) and / or the stock limit ( 19 ) has reached. Shutdown method for a vehicle drive ( 3 ) equipped with a reduction device ( 8th ) provided by the vehicle drive ( 3 ) discharged exhaust gas ( 5 ) a reducing substance ( 9 ) for lowering a pollutant content ( 7 ) of the exhaust gas ( 5 ), a) wherein the existing reduction stock ( 15 ), b) where the vehicle drive ( 3 ) is switched off automatically and / or a restart is inhibited if the reduction substance stock ( 15 ) a stock limit ( 19 ) and after the vehicle ( 2 ) a still approved parental leave mileage ( 31 . 58 (c) where the parental leave service ( 31 . 58 ), evaluating a predicted driving scenario ( 53 ). Switch-off method according to claim 6, - wherein an input ( 32 ) or confirmation ( 60 ) of intended driving behavior ( 61 ) by the driver ( 22 . 55 ) is enforced. Shutdown method according to claim 6 or 7, a) wherein the driver ( 22 . 55 ) Information in a navigation device ( 34 ), which represent a current destination, b) where a route ( 51 ) to the destination ( 52 ) and c) where the parental leave mileage ( 31 . 58 ) taking into account the route ( 51 ). Switch-off method according to at least one of claims 6, 7 or 8, - wherein the parental mileage ( 31 . 58 ) taking into account one on the route ( 51 ) ( 57 ) for reducing agent ( 9 ). Switch-off method according to at least one of claims 6 to 9, - wherein the waiting mileage ( 31 . 58 ) taking into account a driver-side confirmation ( 60 ), that this is the source of supply ( 57 ) is determined. A shutdown method according to at least one of claims 6 to 10, a) wherein information is provided by a memory device ( 63 ) which at least provide earlier driving behavior ( 65 b) where the driving scenario ( 53 ) is predicted taking into account this information. Switch-off method according to at least one of claims 6 to 11, - wherein the driving scenario ( 53 ) taking into account the current calendar time ( 62 ) is predicted. Switch-off method according to at least one of claims 6 to 12, - wherein a first warning ( 21 ) to the driver ( 22 . 55 ) as soon as the reduction stock ( 15 ) in a given Minimum distance ( 18 ) to the stock limit ( 19 ) and / or the stock limit ( 19 ) has reached. A computer program which performs the steps of a method according to any one of claims 6 to 13 when executed on a computer. Computer program product comprising means for carrying out the steps of a method according to at least one of claims 6 to 13, whose means are formed as program code and are arranged such that the method is carried out when the program code is loaded into a working memory and executed by at least one processor.

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