DE102010003247A1 - Efficiency parameter e.g. absolute fuel consumption parameter, displaying method for car, involves displaying efficiency parameters in relationship to reference value e.g. average value, where travel distance is assigned to value - Google Patents

Abstract

The method involves determining efficiency parameters (S2b) for a predetermined travel distance on basis of a consumption parameter. The efficiency parameters are displayed (S2c) in relationship to a reference value e.g. average value, and the predetermined travel distance is assigned to the reference value. The predetermined travel distance and reference value are stored in an external unit of a car, and coordinates of preset driven distance and the reference value are transferred to the car by the external unit. An independent claim is also included for a system for performing a method for displaying efficiency parameter of a car, comprising a car external unit.

Description

The invention relates to a method for displaying at least one efficiency parameter of a vehicle, a vehicle and a system for carrying out the method.

There are known vehicles whose fuel consumption is displayed in a display unit of the vehicle and thereby an advantageous low consumption and a disadvantageous high consumption are highlighted graphically, z. By a color choice such as displaying a red field at high consumption and a green field at low consumption. This should encourage the driver to drive consumption-efficient. However, this method has the disadvantage that it is relatively unspecific and consequently does not optimally support the driver's motivation to drive in a way that is economical to use.

Navigation devices are known which calculate at least one efficiency parameter for a route defined on the navigation device during the journey. The efficiency parameter can z. B. include a score from a range of 1 to 100 points, the score z. B. from the estimated current fuel consumption and from an assessment of the driving style from an acceleration and a deceleration while driving is determined. The navigation device can store a so far best efficiency parameter as a reference value and display it during the journey for comparison with the current value. The reference value is not tied to a specific route, but for comparison on all routes defined by a driver. The reference value is further limited to the routes defined by this navigation device.

It is the object of the present invention to at least mitigate at least one disadvantage of the prior art and, in particular, to assist a driver in moving a vehicle in a particularly efficient, in particular consumption-efficient manner.

This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.

The object is achieved by a method for displaying at least one efficiency parameter of a vehicle, wherein the at least one efficiency parameter is determined for a predetermined route and the at least one efficiency parameter is displayed in relation to at least one reference value, wherein the at least one reference value is assigned to this predetermined route ,

Thus, a driver can compare his or her driving style represented by the at least one efficiency parameter with the at least one respective reference value and attempt to reach or improve the reference value. Comparison with the benchmark appeals particularly to human ambition and its inclination to compete and compare with itself and / or other participants in the process. The driver can therefore be greatly encouraged to play more efficiently. The reference of the at least one reference value to the predetermined driving distance allows the comparison with the at least one reference value without restriction to a period of time. In addition, comparability of the experienced values of the at least one efficiency parameter is greatly improved by reference only to the predetermined driving route.

The process may, in particular, take place in the context of a local-based challenge (LBC or local based services challenge, LBSC), in which case this competition or challenge need not be limited or at least not narrowly timed.

The efficiency parameter may in particular be a parameter which indicates a measure of an efficient driving style, preferably also of a consumption-improved driving style, of a vehicle. The input parameter (s) for calculating the efficiency parameter is or are not limited and may include any suitable parameters.

It is an embodiment that the at least one efficiency parameter is determined on the basis of at least one consumption parameter. Thus, the driver can be encouraged to drive in particular consumption more efficient. In a simplest case, the efficiency parameter may correspond to a consumption parameter.

The at least one consumption parameter can, for. B. include average fuel consumption on the predetermined route. This consumption parameter (for example, given in 1/100 km or mpg) is intuitively comprehensible and highly dependent on the driving style, so that an adaptation of the driving style directly affects the success or failure of the driver. An alternative or additional consumption parameter may be, for example, an absolute fuel consumption (eg indicated in liters or gallons) on this route.

The efficiency parameter may (in particular in addition to the at least one Consumption parameters) from at least one journey-specific, a vehicle-specific and / or a route-specific parameters (collectively referred to as driving parameters) determined, in particular calculated, are.

A travel-specific parameter can, for. B. include a current traffic situation, z. For example, a traffic density detected by a presence of an oncoming vehicle. If the traffic density is high, for example, the value of the efficiency parameter can be increased, since a driver can not drive so efficiently with a high traffic density without being responsible. Another driving-specific parameter may include the vehicle speed. In this case, the efficiency parameter can be reduced, for example, if the vehicle travels much slower than permitted despite an open road (eg with an average speed of 20 km / h on a freeway), only to save fuel but could hinder subsequent traffic ,

At least one further travel-specific parameter may include, for example, at least one driving dynamics parameter, which determines a driving dynamics of the vehicle, for. B. an acceleration, a deceleration and / or a sliding without engine operation maps. The at least one vehicle dynamics parameter can, for. B. also detect a position of an accelerator pedal. By means of the at least one vehicle dynamics parameter, for example, a fuel-efficient driving style can be rewarded.

A vehicle-specific parameter can, for. As a fuel, a displacement, a standard consumption, etc., by means of which the value of the efficiency parameter for better comparability can be adjusted. For example, the value of the efficiency parameter for engines with high standard consumption can be increased in order to improve the comparability of the driving style with vehicles with low-consumption engines.

A route-specific parameter can, for. B. include a maximum permitted speed. For example, the efficiency parameter may be reduced if the vehicle significantly exceeds the allowed maximum speed, although this could lead to a more fuel-efficient driving style. Another route-specific parameter may be a slope on the route, as this also affects the efficiency.

The driving parameters (including the consumption parameter) can be determined and / or stored in particular georeferenced, ie. h., together with an associated position of the vehicle. This facilitates participation in a location-based competition and a calculation of the at least one efficiency parameter.

It is yet another embodiment that the reference value comprises a best value, a worst value and / or an average value for the predetermined driving route. For example, by comparing a value of the efficiency parameter on the current and / or last traveled route, a driver may be animated to have a 'best performance' (compared to the best value), a better performance (compared to the average value), and / or at least not the worst performance (compared to the worst value) in terms of efficient driving. The at least one reference value may refer to a participant (vehicle and / or driver) of the predetermined route or to several participants, for. By comparing it with the best values of multiple participants.

It is also an embodiment that the predetermined route and the at least one reference value are stored in the vehicle. As a result, the method can be performed autonomously by or on the vehicle, for. B. without turning on an external unit. This can be particularly advantageous in a limited to a vehicle variant in which only driven by this vehicle routes are considered to be advantageous, since then no coordination effort with other vehicles is necessary and the predetermined route can be tailored to the needs of the driver, eg. B. the daily route to and / or from the workplace. It is a further development that different drivers of the same vehicle can register as participants in the procedure and can also compete.

The predetermined route can be defined in the vehicle-internal storage in particular individually by a driver, for. B. via an on-board computer with navigation function, via a navigation device, via Google Earth with, for example, following storage in the vehicle, eg. B. via a USB memory, etc. So a particularly user-friendly adjustment can be achieved.

It is also an embodiment that the predetermined route (and preferably further predetermined routes) and the at least one reference value is stored in a vehicle-external unit. The vehicle-external unit, z. As a server, is preferably adapted to communicate with several vehicles in communication (central unit), preferably in real-time communication to this the predetermined (s) route (s) and the at least one reference value for this route (s) known give. These Embodiment has the advantage that even several vehicles can easily use the service of the external (central) unit and consequently can also compete in common on a common predetermined route.

It is a further development that the vehicle-external unit and the vehicle exchange data, in particular in real time, while the vehicle is moving, and the vehicle-external unit, when the vehicle approaches to a predetermined driving distance stored thereon, the coordinates of the predetermined route (s) and at least one associated reference value to the vehicle transmits.

The vehicle can, for example, transmit its position (location coordinates) in real time to the vehicle-external unit. If the vehicle-external unit recognizes that the vehicle is approaching a predetermined distance, eg. B. to 5 km, they can first report the coordinates of the predetermined route (s) to the vehicle, which z. B. on your navigation device or a navigation function of a trip computer o. Ä. Can be displayed. If the vehicle-external unit recognizes that the vehicle is approaching a predetermined distance directly, e.g. B. to 200 m, they can report this to the vehicle and at the same time transmit at least one reference value to the vehicle. The vehicle can then display a representation suitable for carrying out the method.

The method may be run while driving on the predetermined route in the vehicle. After completed driving on this predetermined route, the vehicle can report the value of the at least one efficiency parameter to the vehicle external unit, which returns this value z. B. can use as a new reference value. Thus, a driver can compare with himself and / or with other participants for this route ("microchallenge"), more precisely, compare at least one current efficiency parameter with at least one reference value for the predetermined route. For example, a work path may include one or more such subscriber-independent routes, and the driver may accordingly participate in one or more micro competitions or microchallenges on his way to work and / or back.

It is still an embodiment that the predetermined route and / or the at least one reference value are stored group-related. Thus, for a particular subscriber (driver and / or vehicle), not all possible reference values need to be consulted on the method, but only reference values are used which are linked to one or more group features. Thus, the comparison of the current value of the at least one efficiency parameter may be limited to at least one reference value of certain other vehicles, other persons, vehicles of the same manufacturer, vehicles of the same or similar type (fuel type, displacement, etc.), vehicles with at least one similar standard consumption, etc., either alone or in any combination.

For example, the method may be limited to a comparison with family members moving the same vehicle but individually identifying themselves to participate in the procedure and thus appear as different participants. In another example, the method may be limited to comparison with friends moving different vehicles. In yet another example, the method may be limited to comparison with gasoline or diesel vehicles because diesel vehicles typically have lower fuel consumption. In yet another example, the method may be limited to a comparison with vehicles in a common cubic capacity and / or standard fuel consumption range because the efficiency parameters of these vehicles are better comparable. However, the method is not limited to this and can, for example, also take into account very different vehicles, possibly with a vehicle-specific 'handicap'. The vehicle may send corresponding vehicle data (displacement, standard consumption, etc.) to the central unit for the group-specific comparison; where they can be stored in particular linked with the reference values, eg. In a lookup table.

The displaying of the at least one efficiency parameter in relation to the at least one reference value is not limited to a particular type. Thus, the display can be done in writing, symbolically and / or graphically. Also, displaying the at least one efficiency parameter in relation to the at least one reference value may include displaying a (current and / or final) value of the at least one efficiency parameter and the at least one associated reference value as such, for example as a respective score. Alternatively or additionally, they may be at least one value derived therefrom, e.g. For example, as a difference or as a ranking. The specification of a score and / or a ranking in each case has the advantage that even a complex calculation of the efficiency parameter can be easily mapped.

It is still an embodiment that the at least one efficiency parameter is displayed as an element of a ranking in comparison to best values of several participants on this route ("high score"). For example, the at least one reference value may include, for example, n (n> = 1, eg n = 10) best values of the efficiency parameter, possibly group-related. The current value may be displayed as a rank during the ride and / or as a final rank after the ride (eg, rank 41 of 227). The off-board unit can automatically update the ranking. A participant (driver and / or vehicle) may also provide several of the n best reference values. This embodiment has the advantage that a driver's performance is displayed in a simple and highly competitive manner.

It is yet another embodiment that the at least one efficiency parameter is displayed over several sections of this route as a respective number of points. In other words, the values of the at least one efficiency parameter respectively achieved over several sections of the route can be displayed separately, optionally also with reference values allocated in sections.

It is also an embodiment that the route is defined by at least two points, including a starting point and a destination point, possibly also by one or more intermediate points. This results in the advantage that the at least one efficiency parameter can be influenced not only by the driving style but also by the choice of the specific routing between the points. Thus, the method is added to the tactical component nor a strategic component that can increase the motivation of the driver to participate in the process yet.

Alternatively, the route can additionally be defined by a (complete) route between the starting point and the destination point. This embodiment improves comparability of the driving style as such.

It is a further development that when approaching the predetermined driving route an (eg acoustic and / or visual) indication is issued. This provides the advantage that a driver can adjust his driving style in a timely manner, especially if the predetermined driving route is stored on the external unit, since the driver may not know beforehand that he is approaching a predetermined driving distance.

It is still another embodiment that the display on a display unit of the vehicle, for. As a display (screen and / or head-up display, etc.) of an on-board computer is performed. Thus, the comparative information to a driver can be displayed particularly ergonomic.

It is still an (alternative or additional) development that the display on a mobile device (eg mobile phone, PDA, laptop, etc.) is performed. The mobile device may have, for example, an applet which graphically processes process-related data transmitted to it.

The mobile device may be communicatively coupled to the vehicle, for. B. via a cable or via a radio link such. B. Bluetooth. Thus, the display can also be performed on a vehicle-independent display unit.

Alternatively or additionally, the mobile radio device can be communicatively coupled to the central unit (eg via a telecommunications standard such as GSM, UMTS, CDMA, etc.) in order to graphically transfer data transmitted by the central unit to a mobile station. B. represented by an applet predetermined manner. For this purpose, in a further development, the current value of the at least one efficiency parameter (which has been calculated, for example, in the vehicle) can be transmitted from the vehicle to the central unit and forwarded therefrom to the display unit.

In general, in yet another embodiment, driving data required by the vehicle for calculating the at least one efficiency parameter (such as a current position of the vehicle, current consumption of the vehicle, current vehicle speed, etc.) can be transmitted to the central unit. From this, the central unit can calculate the at least one efficiency parameter and send it back to the vehicle and / or another display unit for display.

Thus, for example, from currently ascertained value pairs of the fuel consumption and the associated position as the driving data, an (integral) value of the fuel consumption over the previously traveled distance can be determined. The same determination of the currently consumed over the route fuel can also be in-vehicle, z. B. by means of an on-board computer, performed if the vehicle is set up accordingly.

It is still an embodiment that a route progress is displayed on the predetermined route. This results in the advantage that the driver can recognize his remaining route and possibly adjust his driving style.

The object is also achieved by a vehicle, wherein the vehicle is set up to carry out the above method.

The vehicle may be equipped for this purpose, for example, with a computer unit, for. As an on-board computer on which the process can run. So the driver z. For example, at the beginning of a journey, enter a route or several routes individually and / or wait for it to pass through a subscriber-independent predetermined route, which is stored in a vehicle-external unit.

In this case, the participation in the method or the procedure of the method may be vehicle-specific, wherein the vehicle appears as a participant, and / or be driver-specific, wherein a driver appears individually as a participant. In a driver-specific participation can thus be distinguished between different drivers of a vehicle.

The vehicle may be configured to exchange data with an external unit to perform the method. In particular, the vehicle may be configured to receive data about at least one route and at least one reference value of at least one efficiency parameter associated with the respective route and to process the method. The vehicle may be further configured to transmit driving data (eg, at least one current position and a current consumption) to the off-board unit, e.g. B. for calculating a value of at least one efficiency parameter and optionally following for forwarding the value to a display unit.

The vehicle may also be configured to display a value of the at least one efficiency parameter with the at least one reference value on a display unit of the vehicle and / or to a communicatively coupled to the vehicle display unit, for. B. to be transmitted to a Bluetooth-connected to the vehicle mobile device.

• – ein Fahrzeug und eine mit dem Fahrzeug kommunikativ in Verbindung stehende fahrzeugexterne Einheit,
• – wobei die fahrzeugexterne Einheit dazu eingerichtet ist, Daten über mindestens eine Fahrstrecke und mindestens einen dieser Fahrstrecke zugeordneten Referenzwert an das Fahrzeug zu übertragen.

The object is also achieved by a system for carrying out the method as described above, wherein the system has at least:

• A vehicle and an off-vehicle unit communicatively related to the vehicle,
• - Wherein the vehicle-external unit is adapted to transmit data on at least one route and at least one of these route assigned reference value to the vehicle.

The individual components and their interaction can be configured as described above.

In the following figures, the invention will be described schematically with reference to exemplary embodiments. In this case, the same or equivalent elements may be provided with the same reference numerals for clarity.

1 shows a possible sequence of the method according to a first embodiment;

2 shows a possible sequence of the method according to a second embodiment;

3 shows a system for performing the method 2 ,

1 shows a possible sequence of the method according to a first embodiment. In the first embodiment shown, the method runs on the vehicle without turning on an external server.

In a first step S1, the driver defines a route on which the procedure can proceed ("EcoChallenge"). This route can z. B. are defined in the vehicle, for example via a navigation function, or transmitted from outside, z. B. by means of a USB memory, which has a generated using Google Earth ".kmz" file. This route will remain stored in the vehicle and thus used several times. The route may be predetermined by the entire route, or only a few points, including a starting point and a destination point, may be required. When approaching the starting point is the driver, z. B. acoustic and / or optical, signal given.

In a second step S2, the driver drives off the route. In this case, driving data of the vehicle together with or including a position or location coordinate (s) are determined in a step S2a in, in particular regular, intervals. The can in a simple case z. B. value pairs (location coordinate (s); current consumption), which are generated and / or processed, for example, every 0.01 s to 1 s. The driving data may generally include other suitable journey-specific data or values, eg. B. a current speed.

At least part of the driving data and at least part of the location coordinates (and optionally other data, eg further driving-specific data, vehicle-specific data and / or route-specific Data), the on-board computer o. Ä. In a step S2b calculate the at least one efficiency parameter for the previously traveled share of the route.

For example, a finite travel distance can be determined from successive values of the location coordinate (n) by subtraction, by matching with the present travel distance or in some other way. This finite distance can then z. B. at least the current consumption on the finite driving distance are assigned (finite consumption). By accumulating the finite consumption over the previously traveled finite travel distances over the entire driving distance traveled so far, an absolute fuel consumption and / or (and possibly quotient formation over previously traveled route) a current average consumption over the previously traveled driving distance can be determined (integral consumption calculation). Alternatively, the values of the efficiency parameter can be calculated on the basis of still further travel-specific, vehicle-specific and / or route-specific parameters. In particular, it may be advantageous for intuitive simple representation if the value of an efficiency parameter is calculated as a score.

The at least one efficiency parameter is displayed in a step S2c in relation to the at least one associated reference value, e.g. B. in the form of a current place in a ranking. In the display, the at least one efficiency parameter may be displayed as such, e.g. B. as a score, with the at least one associated reference value as such, for example, graphically, symbolically or in text form. Alternatively or additionally, the at least one consumption parameter with the at least one associated reference value in the form of at least one value derived therefrom, for. A difference or a rank. As reference values, in particular for the display of a current rank, the n (n> = 1) so far best values on this route are suitable.

The values may be displayed in a display element of the vehicle and / or a vehicle-independent display unit, e.g. B. on a mobile phone and / or separate navigation device. For this purpose, the vehicle-independent display unit can be communicatively coupled directly to the vehicle, for. Via a wireless data connection (eg Bluetooth) or a wired data connection (eg via USB or USB) IEEE 1394 ).

In this embodiment, the calculation of the at least one efficiency parameter takes place exclusively in the vehicle. No vehicle external unit is required. If the display is on an in-vehicle screen, the entire process can be performed autonomously on the vehicle.

2 shows a possible sequence of the method according to a second embodiment.

In a first step S11, a driver drives his vehicle off any path, for. B., a way to his workplace or back. In this case, in particular, regular intervals, determines the position of the vehicle and in real time to the vehicle external unit, for. B. comprising a server transmitted.

When the vehicle approaches in a second step S12 of a predetermined driving route stored on the external unit, which is detected by the external unit, the vehicle-external unit outputs to the vehicle an indication of the approach. The hint may be from the vehicle z. B. be forwarded acoustically or visually to the driver.

Already before, the vehicle external unit in a radius, z. B. 5 km to report the vehicle located predetermined routes to the vehicle. The predetermined distances can z. B. highlighted on a navigation screen. So the driver z. B. change its route to participate in a comparison or an EcoChallenge on the predetermined route or the predetermined section. Alternatively or additionally, the vehicle can independently recognize from its knowledge of the predetermined routes located in the vicinity of the approach to a predetermined route.

Upon reaching or exceeding the starting point of the predetermined driving route, the EcoChallenge is started as such (step S13). The route may be predetermined by the entire route, or only a few points, including the starting point and a destination, are given.

In this case, in step S13, the at least one efficiency parameter for the portion of the route traveled so far for this vehicle or driver is calculated at least from current driving data and the current position (location coordinate (n)) of the vehicle. The driving data can for example be taken into account every 0.01 s to 1 s. The driving data can z. B. vehicle-specific data (type, for example, type of fuel, engine capacity, standard consumption, number of cylinders, manufacturers, etc., for example, uniquely determined from the vehicle identification) and trip-specific data (traffic density, etc.) include. The data transmission between the vehicle and the external unit is preferably sufficiently encrypted and anonymized. The efficiency parameter may additionally be calculated on the basis of route-specific data (eg, a gradient, a speed limit, etc.) which has been transmitted to the vehicle, in particular by the external unit as a route information and / or from the vehicle from a navigation device or an internal navigation function have been determined.

For example, in a simple case, a finite travel distance can be determined from successive values of the position by comparison with the present route or in another way. This finite route can then be assigned an associated current consumption at one of the positions. Again, z. B. by accumulation of (finite) consumption on the previously traversed finite distances and possibly by quotient fuel consumption and / or a current average consumption over the previously traveled driving distance are determined (integral consumption calculation).

Subsequently, in a step S14, the at least one efficiency parameter is displayed in relation to at least one reference value. Thus, the at least one efficiency parameter can be displayed as such (eg as fuel consumption or as a score), together with the at least one associated reference value as such. Alternatively or additionally, at least one value derived from the at least one efficiency parameter and the at least one associated reference value can be displayed, if appropriate together with the at least one reference value, eg. For example, a ranking.

Upon reaching or crossing the destination of the predetermined route, the EcoChallenge is stopped or terminated as such, step S15. The final value for the at least one efficiency parameter may then be compared to the at least one associated reference value and set as a new reference value if it improves a reference value (update). The final efficiency parameter can be reported from the vehicle to the vehicle-mounted unit.

The group of drivers or vehicles may be selected individually, e.g. B. as a group of specific drivers (friends, family members, etc.) and / or self-defined vehicle parameters (engine capacity, etc.) and / or firmly defined and specified for selection.

3 shows a generalized system S for performing the method according to 2 ,

For this purpose, the system S comprises a vehicle 1 that is capable of at least its current position while driving in real time over a communication link 2 , z. As a cellular connection to a vehicle external unit 3 , z. B. a central server or server network to transfer. The vehicle 1 is also able to calculate an efficiency parameter currently.

The vehicle 1 has at least one display unit 4 for displaying the at least one efficiency parameter in relation to the at least one reference value, e.g. B. a screen of an onboard computer. In particular, the vehicle may also have a short-range wireless communication link 5 , z. B. Bluetooth, with another display unit 6 , z. B. a navigation device or a mobile device, communicatively coupled.

The vehicle external unit 3 is set up from the position of the vehicle 1 its approach to one on the external unit 3 to recognize stored predetermined route and to transmit information about the predetermined route (eg., Starting point, destination point, etc., appropriate reference values and possibly route-specific data such as a speed limit, a slope, etc.) to the vehicle. The at least one reference value for the predetermined driving distance is on the external unit 3 stored and can in particular be logically linked or assigned at least for this route with at least one group-related feature.

If the vehicle currently calculates the at least one efficiency parameter and z. B. every 0.1 s to the vehicle external unit 3 transmits, can the vehicle external unit 3 in particular to be set up, the current values of the at least one efficiency parameter in relation to and possibly with at least one reference value to the at least one display unit 6 transferred to. This from the vehicle 1 independent transmission also allows viewing on the vehicle 1 independent display unit 6 by means of an independent communication connection 7 , z. B. a mobile connection (eg., GSM, UMTS, CDMA, etc.). On the communication link 5 can also be dispensed with in a variant. The display unit 4 and or 6 can display z. B. be equipped with a suitable applet.

Of course, the present invention is not limited to the embodiments shown.

• – Berechnen des mindestens einen Effizienzparameters vollständig durch das Fahrzeug ohne Verwendung der fahrzeugexternen Einheit (fahrzeugautonom);
• – Berechnen des mindestens einen Effizienzparameters durch das Fahrzeug, wobei die fahrzeugexterne Einheit dazu lediglich anfänglich benötigte Daten (vorbestimmte Strecke, Referenzwert(e)) liefert; dies entlastet die fahrzeugexterne Einheit, welche in diesem Fall im Wesentlichen als ein Datenspeicher dient, und reduziert eine zu über tragende Datenmenge; oder
• – Berechnen des mindestens einen Effizienzparameters in der externen Einheit, wobei das Fahrzeug im Wesentlichen die zur Berechnung benötigten Fahrdaten (einschließlich einer Position) liefert; dies entlastet das Fahrzeug.

Thus, the calculation of the at least one efficiency parameter may generally be divided between the vehicle and the external unit in various ways, for example as described by:

• Calculating the at least one efficiency parameter completely by the vehicle without using the vehicle-external unit (vehicle autonomous);
• Calculating the at least one efficiency parameter by the vehicle, wherein the vehicle-external unit supplies only initially required data (predetermined distance, reference value (e)); this relieves the off-board unit, which in this case serves essentially as a data store, and reduces an amount of data to be transferred; or
• Calculating the at least one efficiency parameter in the external unit, the vehicle essentially providing the driving data (including a position) required for the calculation; this relieves the vehicle.

The calculation of the efficiency parameter can be performed purely in-vehicle, purely external to the vehicle or as a hybrid form. The calculation can also be carried out distributed.

LIST OF REFERENCE NUMBERS

1

vehicle

2

communication link

3

external unit

4

display unit

5

communication link

6

display unit

7

mobile device

S

system

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 non-patent literature

• IEEE 1394 [0057]

Claims (15)

Method (S1, S2, S2a, S2b, S2c, S11-S15) for displaying at least one efficiency parameter of a vehicle ( 1 ), wherein - the at least one efficiency parameter for a predetermined route, in particular based on at least one consumption parameter, is determined (S2b; S13) and - the at least one efficiency parameter is displayed in relation to at least one reference value (S2c; S14), the at least one reference value of this predetermined route is assigned. The method of claim 1, wherein the at least one reference value comprises at least a best value, a worst value, and / or an average value for that predetermined travel distance. Method according to one of the preceding claims, wherein the predetermined driving distance and the at least one reference value in the vehicle ( 1 ) get saved. Method according to one of the preceding claims, wherein the predetermined driving distance and the at least one reference value in a vehicle-external unit ( 3 ) get saved. Method according to one of the preceding claims, wherein the vehicle-external unit and the vehicle ( 1 ) while driving the vehicle ( 1 ) Exchange data and the off-board unit ( 3 ) when approaching the vehicle ( 1 ) to a predetermined route stored thereon the coordinates of the predetermined route and at least one associated reference value to the vehicle ( 1 ) transmits. Method according to one of the preceding claims, wherein the predetermined route and / or the at least one reference value are stored group-related. Method according to one of the preceding claims, wherein the at least one efficiency parameter is displayed as an element of a ranking over the best value of several participants on this route. Method according to one of the preceding claims, wherein the at least one efficiency parameter over several sections of this route is displayed as a respective score. Method according to one of the preceding claims, wherein the predetermined route is determined by a plurality of route points, including a starting point and a destination point. Method according to one of claims 1 to 8, wherein the route is defined by the complete route. Method according to one of the preceding claims, wherein when a direct approach to the predetermined route an indication is issued. Method according to one of the preceding claims, wherein the display on a mobile radio device ( 6 ) and / or on a display unit ( 4 ) of the vehicle ( 1 ) is carried out. Method according to one of the preceding claims, wherein a route progress is displayed on the predetermined route. Vehicle ( 1 ), where the vehicle ( 1 ) is arranged to carry out the method according to one of the preceding claims. System (S) for carrying out the method according to claims 1 to 13, wherein the system (S) comprises at least: - a vehicle ( 1 ) and one with the vehicle ( 1 ) communicatively ( 2 ) vehicle-external unit ( 3 ), - the vehicle-external unit ( 3 ) is adapted to data on at least one route and at least one of these route associated reference value to the vehicle ( 1 ) transferred to.

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