METHOD AND DEVICE FOR RANGE CONTROL FOR A MOTOR VEHICLE WITH AN INTERNAL COMBUSTION ENGINE AND ADDITIONAL ELECTRIC DRIVE

Description

[0001] The invention relates to a method and a device for range control for a motor vehicle with a combustion engine or a motor vehicle with an additional electric drive. Furthermore, a motor vehicle with such a device is described.

[0002] Every long journey by car presents the problem that the driver must plan for stops due to the vehicle's limited range. This problem is particularly acute for battery-powered vehicles, as their range is currently significantly shorter and the charging station network is sparse.

[0003] For purely battery-powered vehicles with electric motors, there are numerous range control or range management systems, often integrated into navigation systems, which can determine a navigation route to a navigation destination via charging stations. This information can be transmitted to the driver via a graphic route display with graphic symbols, so that the driver is guided and informed about charging stations as stopovers. Furthermore, settings options are known that allow the user to activate or deactivate automatic scheduling of charging stations. For distant navigation destinations, multiple charging stations can also be scheduled for battery-powered vehicles.

[0004] Furthermore, such route displays can display information such as the current charge level. Warning indicators are also known to be provided for battery-powered vehicles when the navigation destination is out of range and no charging station can be found, or the charging station search described above is deactivated.

[0005] DE 10 2017 009515 A1 describes a method for route planning for a vehicle with a fuel tank and electric drive, whereby the method offers intermediate stops for recharging or refueling if the range is determined to be too low.

[0006] EP 3 173 304 A1 describes a method for determining an optimal route for a hybrid vehicle, wherein, after entering the destination, various routes are determined and the determined possible routes comprise at least a first route which is optimized for the preferred use of filling stations for fuel, and a second route which is optimized for the preferred use of electric charging stations, and are provided to the user as a suggestion for selection.

[0007] DE 10 2007 029651 A1 discloses a navigation system in which a display is described in which a starting waypoint, a destination waypoint and one or more waypoints between the starting waypoint and the destination waypoint are shown.

[0008] DE 10 2019 204 217 A1 describes a method for displaying the range of a motor vehicle with a battery. In this method, a minimum and a maximum range are determined based on the battery's state of charge and visualized in a graphic representation. A changeable, graphical range object is generated that extends from the vehicle object toward the target object. The graphical range object comprises at least a first section that extends from the vehicle object to a region of the range object representing the minimum range, and a second section that extends from the first section to an end of the range object representing the maximum range.

[0009] DE 10 2019 100 700 A1 discloses the display of a timeline that indicates upcoming occurrences of petrol stations and / or EV charging stations on a set route.

[0010] However, range issues also arise for conventional motor vehicles with fuel tanks and for hybrid vehicles, especially plug-in hybrids. Even in such cases, the driver or user must consider the limited range and adjust their navigation route around intermediate stops. However, comparable range management for both of these vehicle types is not yet known. For motor vehicles with only a combustion engine, displays are currently provided to the user that simply show gas station objects as waypoints next to the navigation route, so that the driver is informed of the presence of a gas station in a certain vicinity of the specific navigation route and can generally locate it.

[0011] In the case of hybrid vehicles, there is also the problem that the proportion of battery power used during operation is on average too low, meaning that in practice too little electric driving is done.

[0012] The invention is based on the object of providing a range management system for motor vehicles with combustion engines or additional electric drives, which is suitable, among other things, for making range control easier for the driver, increasing the proportion of electric driving and transmitting information to the driver or user regarding the operation of the motor vehicle in an intuitive and understandable manner.

[0013] The invention is defined in the appended claims. The invention relates to a method for range control according to claims 1 and 4.

[0014] In other words, range control is range management. A fuel can be, for example, diesel, gasoline or hydrogen, although the invention is not limited to this. Accordingly, a fuel tank can be a tank for diesel, gasoline or hydrogen. In other words, such a motor vehicle can therefore be a combustion engine vehicle or a hybrid vehicle, in particular a mild hybrid vehicle (MHEV). The range can, for example, still be determined on the basis of fuel consumption in order to obtain a current and precise value. The range is therefore also adaptable, i.e. in particular the range can be recalculated if consumption varies. The gas station can be determined based on a brand and / or the fuel price. Otherwise, it can also be determined based on catering options at the gas station, e.g. food options.The refueling stop can preferably only be determined when the first range is less than the distance to the navigation destination. A refueling stop is therefore only considered when the distance is longer than the range. Only then is a navigation route via the refueling stop required. However, a remaining range may also be required. Furthermore, it is clear here and in the following that the specific navigation route generally changes when including intermediate stops. The navigation route can be recalculated here and in the following explanations continuously or in specific time steps.

[0015] The invention provides automatic inclusion of gas stations for motor vehicles with combustion engines, thus providing integrated range control when determining the navigation route. This allows for multiple refueling stops to be included, for example, on longer routes. This enables multi-stop routing for motor vehicles with combustion engines. The user therefore does not have to plan refueling stops themselves.

[0016] Further preferred embodiments of the invention emerge from the remaining features mentioned in the subclaims.

[0017] The motor vehicle also includes an electric drive. The motor vehicle can therefore be a plug-in hybrid. Multi-stop routing is particularly advantageous for such vehicles.

[0018] The method comprises determining the first navigation route to the navigation destination using only the at least one identified refueling stop. In this context and in similar cases, "only" means that refueling stops are used but not charging stops. This provides a purely fuel-based multi-stop routing. This is particularly important for motor vehicles with an exclusively combustion engine, but can also be used as a setting option for plug-in hybrids. Such a navigation route is particularly fast and thus time-efficient. Such an operating mode, in which only refueling stops are included, can also be executed in response to the detection of a setting by the user.

[0019] The method further comprises determining a second range based on a state of charge of a battery of the electric drive and determining at least one charging stop based on the second range and the route to the navigation destination. The charging station can preferably only be determined when the second range is less than a distance to the navigation destination. Furthermore, a remaining range may be required. The second range can, for example, still be determined based on battery consumption in order to obtain a current and precise value. The range is therefore also adaptable, i.e. in particular the second range can be recalculated even if consumption varies. In other words, a charging station is a charging column. By automatically determining the charging stops, the electric driving share of plug-in hybrids can be increased.

[0020] The method preferably comprises determining the first navigation route to the navigation destination via the at least one determined refueling stop and further via the at least one determined charging stop, which is not covered by the claims. This provides the user with a mixed navigation route with refueling stations and charging stations. The calculated new navigation route thus includes both charging stations and refueling stations. This makes it possible to provide a journey for plug-in hybrids during which the battery is automatically always charged. This allows for environmentally friendly operation with a higher electric component.

[0021] In a preferred embodiment, which is not covered by the claims, the method comprises determining the first navigation route via the at least one determined refueling stop and a charging stop such that the charging stop is the last stop of the first navigation route before the navigation destination. This calculation of the navigation route ensures that the battery is recharged before arrival, i.e., for example, near the home address or the entered navigation destination. This allows the electric component for plug-in hybrids to be increased for subsequent trips, for example, short journeys.

[0022] Preferably, the method further comprises detecting a user input indicative of a selection of a refueling stop or a charging stop as the next stop, and determining the first navigation route via the at least one determined refueling stop and the detected refueling stop or charging stop as the next stop. This allows the user to actively and situationally intervene in the calculation of the navigation route at their discretion. Upon selection of a next charging stop, the electric driving share can also be increased by recalculating the route via the nearest charging stop.

[0023] The method further comprises presenting a first graphic route display on a display comprising a graphic vehicle object and a graphic target object, as well as at least one graphic gas station object indicative of the specific refueling stop on a graphic path between the graphic vehicle object and the graphic target object. In other words, a display is a graphic display device. A route display can, for example, be in the form of a graphic bar, in particular a linear bar with a linear graphic path displayed thereon. The graphic path does not have to be a marker, but can also result from the arrangement of the objects. Such a route display can be presented on the display of a device, in particular a navigation device, alongside a graphic map or navigation map.The displayed objects are each indicative of the vehicle, navigation destination, refueling stop, etc. The display can preferably be true to scale. The route display also makes it possible to convey this information to the driver in a clear manner, so that the user can be informed about the time and distance of the refueling stop. Such a display improves the driver's perception of the route guidance while driving a motor vehicle with an internal combustion engine. In further embodiments of the invention, charging station objects can also be displayed indicative of one or more specific charging stations on the graphical path.

[0024] The method includes determining a second navigation route to the navigation destination using only at least one identified charging stop. This always provides or calculates a navigation route for a driver of a plug-in hybrid that can be operated with a higher proportion of electric power. This effectively increases the electric power share of the plug-in hybrid when using such an eco-friendly route. In this context and in similar cases, "only" means that charging stops are used but not refueling stops. Thus, a navigation route based purely on electric propulsion can be provided as an alternative. The hybrid vehicle can thus be operated in electric mode on such a route.

[0025] According to one aspect of the invention, the method comprises, in response to detecting a navigation route selection from the user's first and second navigation routes, displaying only one of the first and a second route display that corresponds to the selected navigation route, wherein the second graphical route display comprises at least one graphical charging station object indicative of the charging stop on the graphical path between the graphical destination object and the vehicle object. The driver or user can thus switch from navigation route to navigation route and always view the appropriate route display. Thus, either the first route display or the second route display is displayed. Furthermore, the information displayed to the user is dosed so that only the information relevant to the selected route is conveyed to the user.In this case, the map view can also be automatically switched based on the navigation route selection. This allows the driver to switch between a time-efficient and an environmentally friendly route.

[0026] According to a further aspect of the invention, the method comprises the joint display of the first route display and a second route display, wherein the second graphical route display comprises at least one graphical charging station object indicative of the charging stop on the graphical path between the graphical target object and the vehicle object. This gives the driver / user the opportunity to compare the two calculated routes with one another. In particular, the navigation route can thus be selected or changed based on the information from the route displays. For example, the driver can opt for a good navigation route with charging stations, i.e., an only slightly slower route with charging stations, in order to increase the electric component during operation.

[0027] The method further comprises, in response to detecting the user's navigation route selection from the first and second navigation routes, displaying only one map view on the display corresponding to the selected navigation route. This allows only the map view corresponding to the selected navigation route to be shown, despite both route displays being displayed. This always displays the appropriate map, but allows for the option of switching to a different navigation route. The method is thus intuitive and flexible.

[0028] In a preferred embodiment of the invention, the method comprises activating a checkbox from the group of a first and a second checkbox, which is positioned on or assigned to the selected route display. This checkbox ensures that the user always knows which of the two displayed navigation routes is shown on the map.

[0029] The method preferably comprises determining a travel time to the navigation destination based on the pure travel time as well as a refueling time and / or charging time at the at least one refueling stop and / or at least one charging stop, and displaying a resulting travel time next to or on the first and / or second route display. This allows an absolute travel time to be specified for each route, which also includes the time lost during refueling / charging. This information can be particularly helpful when selecting navigation routes.

[0030] In a preferred embodiment, the method comprises determining the refueling time and / or charging time based on the occupancy at the gas station and / or charging station or by providing a predetermined time constant. The time constant for refueling can be, for example, 10 minutes. For charging stations, a different, for example, longer, time constant can be selected. For example, an actual refueling time or actual charging time can be determined based on information received about occupancy. This can put the user in a better position to make decisions, particularly when selecting a navigation route. Furthermore, the estimated arrival time can be better planned.

[0031] In a further aspect of the invention, a device for range control for a motor vehicle with a fuel tank is provided, wherein the device is configured to carry out the method according to one of the above embodiments. The device is preferably a navigation device. The navigation device has, in particular, a control unit for carrying out the individual steps of the method according to the invention.

[0032] Furthermore, a motor vehicle with an internal combustion engine is described, comprising a device for range control according to one of the embodiments of the invention.

[0033] The various embodiments of the invention mentioned in this application can be advantageously combined with one another, unless otherwise stated in the individual case.

[0034] The invention is explained below in exemplary embodiments with reference to the accompanying drawings. They show: Figure 1 shows a motor vehicle and a device for range control according to an embodiment of the invention; Figure 2 shows an illustration of the method for range control according to a first embodiment of the invention; Figure 3 shows an illustration of the method for range control according to a second embodiment of the invention, which is not covered by the claims; Figure 4 shows an illustration of the method for range control according to a third embodiment of the invention, which is not covered by the claims; Figure 5 shows an illustration of the method for range control according to a fourth embodiment of the invention; Figure 6 shows an illustration of the method for range control according to a fifth embodiment of the invention; and Figure 7 shows an illustration of the method for range control according to a sixth embodiment of the invention.

[0035] Figure 1shows a motor vehicle 100 and a range control device 10. The range control device 10 is provided, for example, in the motor vehicle 100, preferably integrated. The motor vehicle 100 includes an internal combustion engine.

[0036] Furthermore, a fuel tank 110 is provided for the combustion engine. Furthermore, an internal combustion engine 115, or a combustion machine, may be provided. Figure 1 These components are described only schematically. The fuel tank 110 can be designed for hydrogen, gasoline, diesel, natural gas, or other fuels. Thus, in a first embodiment, the motor vehicle 100 can be a pure combustion engine vehicle without an additional electric drive.

[0037] In further embodiments, the motor vehicle 100, as shown, can additionally comprise an electric drive. For this purpose, a battery 120 can be provided for the electric drive. Furthermore, an electric motor 125, or an electric machine, is schematically provided. In preferred embodiments, as described further below, this battery 120 can be charged via a charging station. The motor vehicle 100 can thus be a plug-in hybrid. In other embodiments, the motor vehicle 100 can be a mild hybrid.

[0038] The motor vehicle further comprises sensors 11, 12, or a sensor group or sensor system, for determining the range of the motor vehicle. For example, a first sensor 11 can be configured to determine the amount of fuel in the fuel tank 110. Furthermore, other variables can be measured that serve to determine the fuel range, in particular, current fuel consumption.

[0039] For example, if a battery 120 is present, a second sensor 12 can be configured to determine the state of charge of the battery 120. Furthermore, other variables can be measured that serve to determine the range of the battery 120, in particular a current discharge rate.

[0040] The range control device 10 can receive the determined sensor values ​​via transmission from the sensors 11, 12. A control unit 14 can use these sensor values ​​to determine a first range of the fuel portion and / or a second range of the battery, which will be explained in more detail below. The control unit 14 of the device 10 is further configured to determine navigation routes as described in the embodiments below. For this determination, corresponding digital maps and stored navigation data can be provided, which the control unit 14 accesses.

[0041] The control unit 14 is further configured to control a display 16. The display 16, also called a display device, transmits the determined navigation route and other information graphically on a screen to the driver.

[0042] Furthermore, the device 10 includes interfaces so that user inputs can be captured by the control unit 14. For example, this interface can be implemented by a touch-sensitive display 16, although the invention is not limited thereto. The control unit 14 is further configured to execute the embodiments of the range control methods described below. These methods will now be described in more detail.

[0043] Figure 2illustrates the method for range control according to a first embodiment. In a first step, a navigation destination is recorded. This can be done by a user input via an interface described above. After that, a first range is determined based on the fuel quantity. As previously described, the current fuel consumption can also be taken into account. Based on the first range and the distance to the navigation destination, at least one refueling stop can then be determined. This is preferably done if the first range is shorter than the distance to the navigation destination. Furthermore, a first navigation route to the navigation destination is then determined via the at least one determined refueling stop. The determined refueling stop is thus part of the first navigation route. These steps can be carried out by the Figure 1The described control unit 14 can be executed. By taking the refueling stops into account, automatic route planning is provided with refueling stops integrated into the navigation planning. This enables multi-stop routing for combustion-engine vehicles. This advantageously makes refueling a part of the route planning itself and does not have to be processed separately by the user.

[0044] In a further step, as in Figure 2As shown by way of example, a first graphic route display 20 is shown on the display 16. The first route display 20 can be designed as a graphic bar. The route display can also be referred to as a range display. The graphic route display 20 is shown, for example, at the edge of the display 16, for example together with a first map view K1 of the specific first navigation route. In other embodiments, in response to the detection of a user selection, a switch can be made to a detailed view in which the first route display 20 is shown together with navigation route information, for example driving instructions or distance information for required driving maneuvers in order to follow the specific navigation route.

[0045] The route display 20 can comprise a graphical vehicle object 21, which is indicative of the motor vehicle 100. The graphical vehicle object 21 represents an actual position of the motor vehicle 100. Furthermore, a graphical target object 22 is shown. The graphical target object 22 is indicative of the specific navigation destination. A graphical path 26, preferably a linear path, connects the graphical vehicle object 21 with the graphical target object 22. In this embodiment of the invention, a, or at least one, graphical gas station object 24 is also shown, indicative of the at least one specific refueling stop on the graphical path 26 between the graphical vehicle object 21 and the graphical target object 22. If, for example, a longer distance has to be traveled, several refueling stops can be included in the determination of the navigation route, as in the Figure 2The gas station can be determined based on a brand and / or fuel price. Furthermore, the determination can be based on food options, such as dining options.

[0046] Furthermore, a range indicator 28 can be displayed, extending from the graphical vehicle object 21 along the graphical path 26. Its end point indicates the determined range. This can also be provided in all subsequent embodiments. The positioning of the graphical gas station object(s) 24 can be true to scale along the graphical path 26. This allows the driver to estimate distances to intermediate stops. The display also improves the driver's perception of the route guidance while driving.

[0047] In one embodiment of the invention, the first navigation route to the navigation destination is determined only via the at least one determined refueling stop. This provides a navigation route that takes only gas stations into account. Such route planning can, for example, be based on a recorded user input in which this operating mode is selected. Such a mode can also be set for plug-in hybrids, i.e., when the motor vehicle 100 comprises a battery 120 for an electric drive in addition to the fuel tank 110, so that charging stations are not taken into account in this mode. This provides a particularly time-efficient, i.e., fast, navigation route for such motor vehicles.

[0048] In one embodiment of the invention, a travel time to the navigation destination can also be determined based on the actual travel time and a refueling time at the specified refueling stop(s). Such an effective travel time can be displayed on the route display 20. The determination of this effective travel time is only made possible by the fact that the navigation route calculation includes the required refueling stations, i.e., by obtaining knowledge of the required refueling stations.

[0049] In preferred embodiments of the invention, a time constant, for example, 10 minutes, can be set for each refueling stop. In other embodiments, an actual waiting time at the gas station can be transmitted to the motor vehicle and included by device 10 in calculating the travel time.

[0050] The Figure 3illustrates the method for range control according to a second embodiment of the invention. In the following, only differences to Figure 2 explained. For similarities, please refer to the previous description.

[0051] For this embodiment, it is necessary that the motor vehicle 100 comprises, in addition to the fuel tank 110, a battery 120 for the electric drive, which can be charged as shown in Figure 1 The motor vehicle 100 can thus be a plug-in hybrid.

[0052] The method further includes determining a second range. The second range can be determined based on the state of charge of battery 120. Additional information that determines the current discharge rate can also be provided to determine the second range. The second range can thus be determined independently of the first range. Here, too, the discharge rate can be taken into account continuously or at specific intervals.

[0053] Based on the second range and the distance to the navigation destination, at least one intermediate charging stop can be determined. This preferably occurs when the second range is less than the distance to the navigation destination. This can be done, as previously described, by the control unit 14. In this embodiment, both charging stops and refueling stops can thus be used by the device 10 to determine the navigation route.

[0054] In this embodiment, the first navigation route to the navigation destination is determined via the at least one determined refueling stop and further via the at least one determined charging stop. This automatically provides a navigation route in which both the fuel tank 110 and the battery 120 can always be used for propulsion. The plug-in hybrid can thus be operated with a high electric component using the determined navigation route.

[0055] In this version, as in the Figure 3 shown, the representation of the first route display 20 on the display 16 can additionally be carried out with at least one graphical charging station object 25, which is indicative of the determined at least one charging stop on the graphical path 26 between the graphical vehicle object 21 and the graphical target object 22. As in the Figure 2As shown, several charging stations have been identified to ensure that the vehicle can reach the navigation destination with a fully charged battery. This embodiment, i.e., taking charging and refueling stops into account, can also be achieved by capturing a user input that selects this operating mode. Incorporating charging stations into the navigation route planning makes it possible to increase the proportion of electric driving.

[0056] In this case too, an effective travel time to the navigation destination can be calculated based on the pure travel time, a refueling time and charging time per stop and displayed as described above.

[0057] In preferred embodiments of the invention, a time constant, for example, 30 minutes, can be set for each charging stop. In other embodiments, an actual waiting time at the charging station can be transmitted to the motor vehicle and included by device 10 in the calculation of the effective travel time. Here, too, the charging station can be determined based on price and / or brand. Furthermore, the determination can be made based on catering options.

[0058] In further embodiments, it is also possible to set whether charging stations or gas stations should be given priority. In such a mode, a priority can be set for charging stations or gas stations, and the navigation route can be determined accordingly. This also includes the ability to record settings according to which only charging stations or gas stations are scheduled.

[0059] The Figure 4illustrates the range control method according to a third embodiment of the invention, which is not covered by the claims. Only differences from the previous embodiments are explained below. For similarities, reference is made to the entire preceding description.

[0060] In this embodiment, the first navigation route is determined via at least one determined refueling stop and an additional charging stop. The additional charging stop is the last stop of the first navigation route before the navigation destination. The additional charging stop is in the Figure 4as charging station object 25 shortly before the destination object 22. This allows the battery to be fully recharged shortly before arrival. For example, the charging station near the home address can be searched for. Determining a charging station can also be done based on a driving profile. In subsequent trips, the electric component of plug-in hybrids can thus be increased, since a fully charged battery 120 is available.

[0061] The Figure 5 illustrates the range control method according to a fourth embodiment of the invention, which is not covered by the claims. Only differences from the previous embodiments are explained below. For similarities, reference is made to the entire preceding description.

[0062] In this embodiment, a user input indicative of a selection of a refueling stop or a charging stop as the next stop is detected. This can be done via an interface of the device 10, for example, via the display 16 itself, for example, via the route indicators. The first navigation route is then determined using the at least one determined refueling stop and the detected refueling stop or charging stop as the next stop.

[0063] In the present figure, for example, a charging stop has been entered as the next stop as user input, which was used to calculate the first navigation route. This allows the user to actively add and control charging and refueling stops for the navigation route calculation. For example, if only refueling stops were planned, the user can Figure 1, switch to electric mode by driving to the nearest charging station, charging the battery, and driving in electric mode. This can increase the proportion of electric driving. Conversely, when driving in electric mode, a gas station can be used to navigate a longer distance using fuel. This can be used to minimize travel time.

[0064] The settings can be made in a system setup or with a switch on the distance display 20 itself.

[0065] Figure 6 and Figure 7 illustrate methods for range control according to a fifth and sixth embodiment of the invention. Only differences from the previous embodiments are explained below. For similarities, reference is made to the entire preceding description.

[0066] In these embodiments of the invention, a second navigation route to the navigation destination is determined via at least one determined charging stop. Furthermore, a second graphical route display 20' can be shown on the display 16. The route display 20' is structured analogously to the first route display 20. It includes a graphical charging station object 25 indicative of the charging stop on the graphical path 26 between the graphical target object 22 and the graphical vehicle object 21.

[0067] The second navigation route to the navigation destination is determined only via at least one identified charging stop. This makes the second navigation route an ecological route, allowing for a higher proportion of electric power. The first navigation route includes only refueling stops. In further embodiments of the invention, navigation routes can be selected according to operating modes, for example, fast or short and ecological, or electric or fuel-based.

[0068] In the proceedings under Figure 6A navigation route selection from the first and second navigation routes can be made by the user. For this purpose, for example, a switching element W can be provided on the route displays 20, 20' as an interface. Alternatively, such a selection can be made in a setup. In response to the detected user selection, only one of the first and second route displays 20, 20' is displayed, which corresponds to the selected navigation route. This selection option is provided in the Figure 6 The user's selection also changes a first map view K1 to a second map view K2 corresponding to the selected navigation route.

[0069] This multiple navigation calculation allows the driver to choose between routes based on their preferences. This also allows the user to switch at any time to a mode that allows driving with a higher proportion of electric power. The second navigation route, on the right in the figure, is a navigation route with only charging stops as intermediate stops. The first navigation route, on the left in the figure, is a navigation route with only refueling stops. The user can thus switch between these two borderline cases, allowing them to tailor the vehicle's operation to their preferences, for example, with regard to eco-driving.

[0070] The second navigation route includes at least one charging stop, whereas only refueling stops are specified for the first navigation route. Multi-stop route planning is thus only performed for electric charging for the second navigation route. This can also be done via a settings area or via the switching element W of the route displays 20, 20', which allows switching between the two displays and both route guidance options.

[0071] Figure 7 shows an embodiment in which the method comprises the joint display of the first route display 20 and the second route display 20'. This allows the two navigation routes, for example one with only charging stops and the other with only refueling stops as in the Figure 7shown or with mixed stops, can be directly compared with each other. For example, the kilometers traveled or the determined effective travel time, as described above, can be used as comparison parameters to enable the user to make a selection based on their preferences for the specific trip. In response to the detection of the user's navigation route selection from the first and second navigation routes, only one map view K1, K2 is displayed on the display 16, which corresponds to the selected navigation route. For example, the first navigation route is selected here, and thus the first map view K1 is shown accordingly.

[0072] The map view K1, K2 shown can be indicated by a marker field M1, M2. For example, a marker field M1, M2 can be activated from the group of a first and a second marker field M1, M2, which is positioned on the route display 20, 20' corresponding to or assigned to the selected navigation route. For example, in the present case, the first marker field M1 would be activated. This provides a better overview when displaying the two navigation routes in parallel.

[0073] The invention provides a range management system for motor vehicles with combustion engines or additional electric drives, which is suitable, among other things, for making range control easier for the driver, increasing the proportion of electric driving and transmitting information to the driver or user regarding the operation of the motor vehicle in an intuitive and understandable manner. List of reference symbols

[0074] 10Range control device 11first sensor 12second sensor 14control unit 16display 20First route display 20Second route display 21Graphical vehicle object 22Graphical target object 24 graphical gas station object 25 graphical charging station object 26graphic path 28Reach indicator 100Motor vehicle 110Fuel tank 115Combustion engine 120Battery 125Electric motor K1first map view K2second map view WSwitching element M1, M2 marking field

Claims

1. Method for range control of a motor vehicle (100) having a combustion engine and an electric drive, comprising: - detecting a navigation destination; - determining a first range based on an amount of fuel in a fuel tank (110) for the combustion engine; - identifying at least one refueling stop based on the first range and a route to the navigation destination; - determining a first navigation route to the navigation destination via the at least one identified refueling stop and not via a charging stop; - determining a second range based on a state of charge of a battery (120) for the electric drive, - identifying at least one charging stop based on the second range and the route to the navigation destination, - determining a second navigation route to the navigation destination via at least one identified charging stop and not via a refueling stop, characterized by, - jointly showing a first route display (20) and a second route display (20') on a display (16), the first route display (20) comprising at least one graphical filling station object (24) indicative of the at least one determined refueling stop on a graphical path (26) between a graphical vehicle object (21) and a graphical target object (22), and the second graphical route display (20') comprising at least one graphical charging station object (25) indicative of the at least one charging stop on the graphical path (26) between the graphical target object (22) and the vehicle object (21), and - in response to the detection of a navigation route selection for switching between the user's first and second navigation routes, displaying only one map view (K1, K2) on the display (16), which corresponds to the selected navigation route.

2. Method according to claim 1, characterized by detecting a user input indicative of a selection of a refueling stop or a charging stop as the next stop, and determining the first navigation route via the at least one identified refueling stop and the detected refueling stop or charging stop as the next stop.

3. Method according to claim 1, characterized by marking a check box (M1, M2) from the group of a first and a second check box (M1, M2), which is positioned on the route display (20, 20') corresponding to the selected navigation route or is assigned thereto.

4. Method for range control of a motor vehicle (100) having a combustion engine and an electric drive, comprising: - detecting a navigation destination; - determining a first range based on an amount of fuel in a fuel tank (110) for the combustion engine; - identifying at least one refueling stop based on the first range and a route to the navigation destination; - determining a first navigation route to the navigation destination via the at least one identified refueling stop and not via a charging stop; - determining a second range based on a state of charge of a battery (120) for the electric drive, - identifying at least one charging stop based on the second range and the route to the navigation destination, - determining a second navigation route to the navigation destination via at least one identified charging stop and not via a refueling stop, characterized by, - showing a first route display (20) or a second route display (20') on a display (16), the first route display (20) comprising at least one graphical filling station object (24) indicative of the at least one determined refueling stop on a graphical path (26) between a graphical vehicle object (21) and a graphical target object (22), and the second graphical route display (20') comprising at least one graphical charging station object (25) indicative of the at least one charging stop on the graphical path (26) between the graphical target object (22) and the vehicle object (21), and - in response to detecting a navigation route selection for switching between the user's first and second navigation routes, displaying only one map view (K1, K2) and only one of the first and second route displays (20, 20') on the display (16), which correspond to the selected navigation route.

5. Method according to any of claims 1 to 4, characterized by determining a travel time to the navigation destination based on the pure travel time and a refueling time and / or charging time at the at least one refueling stop and / or at least one charging stop, and displaying the travel time next to or on the first and / or second route display (20, 20').

6. Device (10) for range control of a motor vehicle (100) having a combustion engine, wherein the device (10) is designed to carry out the method according to any of claims 1 to 5.