DE102016204144A1 - Method and control device for controlling and / or regulating a functional system in a motor vehicle - Google Patents

Abstract

The invention relates to a method and a control device (1) for controlling and / or regulating a functional system in a motor vehicle with a drive motor, for example an internal combustion engine (6), taking into account at least one motor vehicle available, in particular via a control device (1) location-dependent and / or motor vehicle-dependent information (4, 5). An improved control and / or regulation of functional systems in motor vehicles can be achieved in that during a drive of the motor vehicle, a future shutdown of the internal combustion engine (6) to end the ride taking into account the available location and / or motor vehicle-dependent information (4, 5) is predicted and that, in particular depending on the functional system in time, before the shutdown a measure is taken to bring the functional system in a parking state.

Description

The invention relates to a method for controlling and / or regulating a functional system in a motor vehicle having a drive motor, for example an internal combustion engine, taking into account at least one location-dependent and / or motor vehicle-dependent information available, in particular via a control device, and a control device for the corresponding one Control and / or regulation.

State of the art

Currently, there are various developments with the aim of optimizing control concepts of subsystems of a motor vehicle, taking into account external boundary conditions. As subsystems, for example, the internal combustion engine, parts of the associated peripherals such as the fuel supply system, an exhaust aftertreatment system, which in turn may be divided into subsystems, and other functional units or from such formed functional systems of a motor vehicle can be considered. External constraints are e.g. given by a current traffic situation and / or traveled route, the profile of the approached engine operating points and thus also adjacent functional systems, e.g. Control strategies for exhaust aftertreatment, significantly influenced.

In order to optimize the control of exhaust aftertreatment units, it is known, for example, to design the control strategy including predicted route data that the vehicle will be traveling in the near future. So is in the DE 10 2008 025 569 A1 a method for controlling and / or controlling a functional system of a motor vehicle specified with internal combustion engine, in particular arranged in an exhaust system of a diesel engine particulate filter. In this case, a forecast of a future operating mode of the internal combustion engine is created and, taking into account the prognosis, a state of the functional system is controlled and / or controlled in a forward-looking manner. Disclosed are measures for optimizing the exhaust aftertreatment strategy, in particular with regard to the particulate filter, during driving.

The present invention has for its object to further optimize the control and / or regulation of functional systems in motor vehicles.

Disclosure of the invention

This object is achieved for the method with the features of claim 1 and for the control device with the features of claim 11. It is provided for the method that while driving the motor vehicle, a future shutdown of the drive motor to complete the journey is predicted and that, in particular depending on the functional system in time before taking a measure is taken to bring the functional system in a shutdown , The future parking can be determined temporally, in particular with respect to a point in time, but also, for example, spatially, by means of a remaining path to be covered, or by other boundary conditions. "Timely" means that the time period or path or the like is preferably selected prior to parking so that the parking state is already reached when parking or will be reached shortly thereafter, so that a benefit from the advance of the measure before stopping the engine are drawn can. Of course, several such measures can be initiated, even on differently structured functional systems.

In an advantageous embodiment of the invention, the location-dependent / n information / s include a predicted and / or known Abstellort and / or path, navigation data, position data of the motor vehicle, card-based information, current (eg transmitted via mobile) traffic and / or location information such as current parking facilities, especially in public parking lots (eg at major events such as fairs, conurbations, etc., possibly also taking into account the current occupancy) and / or traffic sign recognition such as parking area designations, parking garage signs, etc., or other telematics data. In this case, location-dependent information can also be used to determine other location-dependent information (for example for the prognosis of a path to be traveled), from which the shutdown of the internal combustion engine is then predicted. The position data of the motor vehicle can be determined without active route guidance, for example via GPS, Galileo, mobile radio cells or other position determination systems. It is also possible to integrate calendar information (for example on weekends and holidays, time of day, storage period), which can be advantageous, for example, when forecasting the storage location and / or the distance to be covered based on the recognition of recurring paths. With such a prognosis, the time and / or the way to switch off the internal combustion engine can be determined on the basis of the predicted storage location and / or path. It is also conceivable, for example, that a section of the route is recognized as known and From there, an average time is stored, after which the internal combustion engine is turned off, so that no immediate information about the Abstellort is needed.

In this case, it is advantageous, for example, when the prognosis is based on the location-dependent information / s to determine when a parking location is reached, and that the parking of the internal combustion engine is linked to the reaching of the parking location. This variant can be particularly advantageous if the measure to bring the functional system into a shutdown state is a rather long-term measure, which depends less on a precise time of shutdown (eg with an accuracy of less than one minute) ,

In a further variant, in the location-dependent information as a predetermined Abstellort a place to be deposited actively by a driver as a frequent destination in a designated and with a control device in data connection standing memory. The memory may also be part of the control device. The locations can be deposited, for example, by the driver by means of interaction via a menu, for example by pressing a button, via a personal mobile application or the like. In this case, the driver can be actively asked if he wants to deposit a certain place as a "frequent Abstellort", or he can deposit a place without a request. Also, a limitation of the number of memory locations in the memory may be provided (for example, to 5 memory locations) in order to prevent accumulation of too many, in particular rare Abstellorte. Based on the list, a frequent Abstellort with a high probability, in particular with the inclusion of further location-dependent information, then be predicted.

In this context, it may be advantageous if the starting frequency of the frequent destination is checked by means of a comparison device and if the location is no longer used as the frequent destination if the predetermined starting frequency is not reached. This makes it easier to ensure that the most common locations are usually in the list, which can improve forecasting accuracy.

A high accuracy of the prognosis is also achievable in that vehicle-dependent information / s is an operating variable of the motor vehicle, such as vehicle speed, a steering angle, a rotational speed and / or a current gear of the vehicle, an action of the driver on the motor vehicle, such as a change between two gears, in particular between forward and reverse gear, setting the turn signal, activating a parking aid and / or actuate the brake and / or sensor data of the motor vehicle, such as information from located on the motor vehicle cameras and / or information from ultrasonic and / or wheel sensor / en include.

The method can be used particularly advantageously if the parking is determined by detecting a parking scenario of the motor vehicle as being in the near future, taking into account the combination of a plurality of location-dependent and / or motor vehicle-dependent information and / or the temporal change of at least one motor vehicle-dependent information in the control device and the parking scenario is detected on the basis of the occurrence of a specific combination and / or a specific time change, and then at least one measure is taken to bring the functional system into the storage state. Thus, for example, from a combination of actions of the driver, possibly taking into account the temporal change of an operating size of the motor vehicle, within a limited time window of, for example, below one minute, a parking scenario can be detected. It would be conceivable, for example, a combination of setting the turn signal, engagement of the reverse gear, a strong steering angle change, switching to forward gear and / or steering angle change in the other direction. Another combination would be, for example, activating a parking aid and setting the turn signal and / or changing the steering angle. It is also conceivable to include an image analysis of cameras located on the vehicle. Other typical parking scenarios, including vehicle-related information, can also be defined. It may also be advantageous if the parking scenario is detected with the inclusion of location-dependent information, in particular the current parking situation, or even different parking scenarios depending on a given parking situation are taken into account. Thus, for example, an evaluation for the detection of the parking scenario could only be carried out in locations which allow a parking of the motor vehicle. For example, in a variant, initially a road with parking spaces located on the side can be recognized via GPS and / or based on a preceding traffic sign recognition. In this context, reverse engagement could be considered a parking scenario. This variant of the invention is particularly advantageous in the case of a one-time shutdown of the internal combustion engine in the future at a previously unattended or rarely approached storage location.

"In the near future" means here that the motor vehicle with a high probability within a short time, for example within the next one to two minutes, is turned off and certain before the end of the journey Engine operating points (eg those at high speed) are no longer approached. Thus, the Abstellort of the vehicle can already be reached (almost) and the vehicle is only brought into a parking position. In this variant, therefore, less of the still traversable path of the motor vehicle is decisive for stopping the internal combustion engine, but, for example, the sequence of certain measures to bring the motor vehicle into the parking position, and an associated period of time. It is conceivable, for example, that by recognizing the Abstellsarios the shutdown of the internal combustion engine within a certain time in the near future (eg, below 2 minutes, eg 30 or 15 s, etc.) is assumed and by means of this information in time a measure is taken to a bring certain functional system in the Abstellzustand.

The method can be used particularly advantageously if the functional system is formed by a DeNOx system of an exhaust aftertreatment system of the motor vehicle and if the DeNOx system is deactivated as a measure. In this case, the DeNOx system preferably has an SCR dosing system and in deactivation, in order to bring the DeNOx system into a shutdown state, the metered addition of urea solution is stopped in good time and / or pressure lines of the SCR dosing system are emptied by sucking back urea solution. The emptied lines in the shutdown state ammonia (NH ₃ ) crystallizations can be avoided in the exhaust system. The measures can advantageously be initiated in the near future before parking the motor vehicle, for example, 30 seconds before parking or shorter, and when performing both partial measures at different times before parking. Furthermore, the timely shutdown of the metering can prevent the formation of an NH ₃ cloud which, for example, can have a disadvantageous effect on a NOx sensor of a diagnostic device. Thus, this measure has an advantageous effect on the longevity and reliability of the exhaust aftertreatment system. In addition, an environmental impact by the NH ₃ cloud is prevented.

By laying the SCR system blank in the phase before switching off the engine, this measure can be at least partially performed with the generator running, so that the required electrical energy does not need to be removed from the battery as otherwise in conventional systems in the Steuergerätenachlauf. Thus, even a partial Vorverlegen this measure already has the benefit that the battery is conserved and / or their energy can be made available to other systems. Further, the noise is advanced by sucking back at least partially in the period with the engine still running, in which usually the vehicle occupants are still inside the vehicle. The noise of this measure is thus perceived less strongly, which brings a customer benefit.

Furthermore, the method is advantageously applicable if the functional system is formed by an additional water injection system for injecting water into the combustion tract of the internal combustion engine and if as a measure water from lines of the water injection system, in particular a rail, is removed, in particular by sucking back. A trend towards the use of additional water injection into the combustion tract is to be perceived in particular in gasoline engines. When parked, when the vehicle is parked, the water must be removed from the lines of the injection system, in particular so that it does not freeze at low outside temperatures. If the water is removed before stopping the internal combustion engine or at least initiating the removal, it is also advantageously possible to at least partially prevent the noise from being perceived as disturbing. Likewise, it can also be at least partially prevent that the electrical energy for removing the water in the control unit tracking is removed from the battery, which is beneficial to the energy balance.

A further advantageous application arises when the functional system is formed by a soot particle filter of an exhaust gas aftertreatment system of the motor vehicle and if, as a measure, a regeneration of the soot particle filter is prevented and / or aborted prematurely before stopping. By premature termination, it can be achieved that the functional system has already cooled down at least partially when it is switched off, as a result of which the development of odors is reduced and vehicle occupants are less disturbed by the odor development during ongoing particle filter regeneration after exiting after the journey.

In the control device is provided that it is in communication with a prediction device in communication or comprises a prediction device, wherein the prediction device is designed in such a way that it performs a prediction of a future shutdown of the drive motor to complete a ride while driving and that the control device is formed is, in particular depending on the functional system in a timely manner to control and / or to regulate before stopping a measure with which the functional system is brought into a parking state. In this case, the control device may comprise a plurality of sub-control systems. The control / regulation can also be used in the initiation of the control / regulation a sub-control system or other control device exist.

Also advantageous is a motor vehicle with a control device which is designed in the manner previously described.

The invention will be explained in more detail by means of exemplary embodiments with reference to the drawing. It shows:

1 a schematic illustration of a control device in data exchange connection with a forecasting device for controlling / regulating an SCR dosing.

1 shows a control device 1 for controlling and / or regulating different functional systems in a motor vehicle, with which the control device 1 for example via a data bus in data exchange connection 3 stands. In the present case, if appropriate, several data exchange connections 3 to functional systems only a data exchange connection 3 to an SCR dosing system 8th shown that a DeNOx system of an exhaust aftertreatment system 7 assigned. The exhaust aftertreatment system 7 is downstream of an internal combustion engine 6 arranged in a motor vehicle. The SCR dosing system 8th includes a reservoir 8.1 with a urea solution, a conveying direction 8.2 (For example, a feed pump) and at least one pressure line 8.3 for the promotion of the metered addition of the urea solution to a DeNOx catalyst of the exhaust aftertreatment system 7 ,

The control device 1 is still in data communication 3 with a forecasting device 2 , wherein the forecasting device 2 also the control device 1 could be assigned. The forecasting device 2 become location-dependent information 4 and / or vehicle-dependent information 5 from different sources via data exchange connections 3 fed. Sources may include, for example, a navigation system, sensors or other storage and / or control devices (including the control device 5 ) or the like facilities where location-dependent and / or vehicle-dependent information 4 . 5 are stored and / or supplied to the motor vehicle.

In the forecasting device 2 Now, the different information are combined and, for example statistically, such as using information processing or telecommunications technology known methods evaluated to stop the engine 6 to forecast. The forecast could be, for example, when driving to a parking space for parking for a purchase as follows: By a navigation system is the forecasting device 2 , even without active route guidance, the current location information supplied that are located in the area, for example, right of the vehicle at the roadside parking facilities. This current location information may have previously been determined by the navigation system in different ways, for example due to positioning of the vehicle by means of eg GPS including the current parking situation that was previously supplied to the navigation system, or otherwise. It would also be conceivable that the forecasting device 2 exclusively or additionally another location-dependent information is supplied.

In addition, vehicle-dependent information can now be added 5 , which is also the forecasting facility 2 be associated with the information about the nearby parking facility. Thus, if, within a certain period of time, for example within 10 seconds, the vehicle speed decreases, the turn signal is turned to the right and / or the steering angle turn to the right changes, this could be interpreted as a parking scenario in which the internal combustion engine 6 is likely to be shut down in the near future.

The information about the parking of the vehicle after recognized parking scenario is now the forecasting device 2 to the controller 1 transmitted. The control device 1 then brings the DeNOx system 8th the exhaust aftertreatment system 7 by deactivation in a shut-off state, on the one hand to stop the metered addition of urea solution and on the other hand, the emptying of the pressure lines 8.3 of the SCR metering system by sucking back the urea solution, for example by means of the conveyor 8.2 in the reservoir 8.1 , controls. As a result, on the one hand, the risk of the formation of a NH3 cloud can be reduced. On the other hand, the noise during emptying and the energy extraction is at least partially to the time before stopping the engine 6 advanced, so that the noise is perceived as less disturbing and the energy for sucking back can be provided at least partially via the generator of the motor vehicle.

Similarly, if provided, an injection system could be used to inject water into the combustion tract of the internal combustion engine 6 be brought as a functional system in a parking state. The different measures for the Abstellzustand can be initiated at the same time or offset from each other, for example, if the achievement of the Abstellzustands takes different lengths. Other functional systems, which are not mentioned here, can open suitable for them be brought into a shutdown state.

By bringing forward such measures to bring different functional systems in a parking state after completion of a ride, depending on the functional system different advantages can be achieved. Frequently, as mentioned with the DeNOx system, the load on the vehicle battery in the control unit tracking or the background noise after the vehicle is parked can be reduced. In this way, by means of the described method and the described control device, the control and / or regulation of the motor vehicle can be further optimized, taking into account external boundary conditions.

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 102008025569 A1 [0003]

Claims (12)

Method for controlling and / or regulating a functional system in a motor vehicle having a drive motor, for example an internal combustion engine ( 6 ), taking into account at least one of the motor vehicle, in particular via a control device ( 1 ), location-dependent and / or motor vehicle-dependent information ( 4 . 5 ), characterized in that during a drive of the motor vehicle, a future shutdown of the drive motor to end the ride taking into account the available location and / or motor vehicle-dependent information ( 4 . 5 ) is predicted and that, in particular depending on the functional system in time, before taking a measure is taken to bring the functional system in a shutdown. Method according to claim 1, characterized in that the location-dependent information (s) ( 4 ) include a predicted and / or known Abstellort and / or path, navigation data, position data of the motor vehicle, card-based information, current traffic and / or location information such as current parking, and / or traffic sign recognition such as parking area designations, parking garage sign. Method according to one of claims 1 and 2, characterized in that in the prognosis on the basis of the location-dependent information / en ( 4 ) is determined when a Abstellort is reached, and that the shutdown of the drive motor is linked to the reaching of the Abstellorts. Method according to one of the preceding claims, characterized in that in the location-dependent information ( 4 ) as a predetermined Abstellort a place active by a driver as a frequent destination in a designated and with the control device ( 1 ) is stored in data connection standing memory. A method according to claim 4, characterized in that the starting frequency of the frequent destination via a comparator controls and falls below a predetermined Anfahrhäufigkeit the place is no longer used as a frequent destination. Method according to one of the preceding claims, characterized in that the motor vehicle-dependent information / s ( 5 a) an operating variable of the motor vehicle, such as vehicle speed, a steering angle, a rotational speed and / or a current gear of the vehicle, b) an action of the driver on the motor vehicle, such as a change between two gears, in particular between forward and reverse gears the flasher, activating a parking aid and / or brake, and / or c) sensor data of the motor vehicle, such as information from cameras located on the motor vehicle and / or information from ultrasound and / or Radsensor / s include. Method according to one of the preceding claims, characterized in that the parking is determined by detecting a parking scenario of the motor vehicle as lying in the near future, wherein the combination of a plurality of location-dependent and / or motor vehicle-dependent information ( 4 . 5 ) and / or the temporal change of at least one motor vehicle-dependent information in the control device ( 1 ) is taken into account and that the parking scenario is detected on the basis of the occurrence of a particular combination and / or a specific change in time of at least one piece of information and then at least one measure is taken to bring the functional system in the Abstellzustand. Method according to one of the preceding claims, characterized in that the functional system by a DeNOx system of an exhaust aftertreatment system ( 7 ) of the motor vehicle is formed and that as a measure the DeNOx system is deactivated. Method according to claim 8, characterized in that the DeNOx system comprises an SCR dosing system ( 8th ) and in that the deactivation of the metered addition of urea solution is stopped in good time and / or that pressure lines ( 8.3 ) of the SCR dosing system ( 8th ) are emptied by sucking back urea solution. Method according to one of the preceding claims, characterized in that the functional system by an additional water injection system for the injection of water into the combustion tract of the internal combustion engine ( 6 ) is formed and that as a measure of water from lines of the water injection system, in particular a rail, is removed, in particular by sucking back. Control device ( 1 ) for controlling and / or regulating a functional system in one Motor vehicle with a drive motor, for example internal combustion engine ( 6 ), for carrying out the method according to at least one of the preceding claims, taking into account at least one of the motor vehicle, in particular via the control device ( 1 ), location-dependent and / or motor vehicle-dependent information ( 4 . 5 ), characterized in that the control device ( 1 ) with a forecasting device ( 2 ) in data exchange connection ( 3 ) or a forecasting device ( 2 ), wherein the forecasting device ( 2 ) is configured in such a way that it performs a prediction of a future shutdown of the drive motor for the termination of a drive while driving and that the control device ( 1 ) is formed, in particular depending on the functional system in time to control and / or to regulate a measure before stopping, with which the functional system is brought into a shutdown. Motor vehicle with a control device according to claim 11.

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