DE102010053489B3 - Navigation system for car, has memory unit storing specifications of other cars, where system evaluates traveled route and determined alternative routes under ecological points of view and least fuel consumption route is displayed to driver - Google Patents

Abstract

The system (1) has an input unit (2) for inputting starting and target points and car-specific data to a car. A transmission unit (5) transmits specifications of other cars. The specifications are stored in a memory unit (7), where the system evaluates a traveled route and all determined alternative routes under ecological points of view. Fuel consumption on the traveled route and the alternative routes is determined from a fuel consumption function of the car and speed that is transmitted by the other cars in a network. A least fuel consumption route is displayed to a driver.

Description

The invention relates to an adaptive vehicle navigation system in network network with navigation systems of other vehicles, which makes an ecological assessment in terms of fuel consumption for the proposed route, as well as for all calculated alternative routes. The in the patents DE 10 2007 032 956 B4 and DE 10 2009 020 054 B3 described systems are thus supplemented by other components. These enhancements to the previously developed navigation systems take into account the fuel consumption of the engine and specifications for consumption-optimized driving style in order to determine from this for the determined route and for alternative routes the one that causes the lowest emission of pollutants. In congestion situations, a recommendation can be made as to whether driving around the congestion is really the better alternative.

State of the art

Routing and optimization procedures are off DE 10 2009 020 054 B3 . DE 10 2007 032 956 B4 . DE 10230832 A1 . DE 10226084 A1 and DE 10062856 A1 known. With the fuel consumption, or the pollutant emissions from motor vehicles are quite a few publications, z. B. DE 10 2009 036 674 A1 . DE 10 2008 002 695 A1 . DE 10 2008 030 070 A1 . DE 10 2005 047 333 A1 . DE 10 2005 035 306 A1 . DE 10 2004 024 259 A1 . DE 10335927 A1 . DE 19615236 A1 . DE 19605458 C1 . US 5913917 A . JP 002008045992 A and JP 002008020382 A Driver information systems that determine switching information and indicate to the driver an indication to achieve a consumption-optimized driving style, are off DE 10 2008 028 561 A1 as well as already out DE 3226829 A1 or DE 3128080 A1 known. Furthermore, navigation systems already on the market with an eco-function should also be mentioned, for example the EcoNavigation from Garmin, which is described for example at www.n24.de/news/newsitem 4812236.

So far, no method for vehicle navigation systems, which are used exclusively in the decentralized network with other vehicles have been given, which take into account vehicle data, such as the fuel consumption of the engine or the driving style of the driver to suggest an ecologically optimized route guidance.

task

Based on the current state of the art, the present invention seeks to provide a vehicle navigation system in network with other vehicles, which receives and processes data decentralized, traffic flow data determined and stores them in a database to be consulted for forecast purposes in congestion situations later and for the determined route, as well as for alternative routes, evaluations - which depend on vehicle data and driving style - regarding the environmental impact.

According to the invention, these objects are achieved by a navigation system having the features of claim 1. The dependent claims contain advantageous training and further education.

• – einer Eingabeeinheit (2) zur Eingabe von Start- und Zielpunkt sowie von fahrzeugspezifischen Daten zum Fahrzeug und weiteren Parameter,
• – einer Ausgabeeinheit (3) zur Ausgabe von ausgewerteten und aufbereiteten Daten,
• – einer Empfangseinheit (4) zum Empfang von Fahrzeugdaten anderer Fahrzeuge,
• – einer Sendeeinheit (5) zur Übermittlung eigener Fahrzeugdaten an andere Fahrzeuge,
• – einem GPS-Modul (6),
• – einer Speichereinheit I (7), in welcher die erhaltenen Fahrzeugdaten abgelegt werden,
• – einer Speichereinheit II (8), in welcher Datensätze von historischen Verläufen von Verkehrsbeeinträchtigungen und die Daten der einzelnen Fahrten mit jeweiligen Verbrauchswerten abgelegt werden,
• – einer Speichereinheit III (9), in welcher fahrzeugspezifische Daten zum Fahrzeug umfassend Motorkennzahlen, Kraftstoffverbrauchsfunktion, optimale Schaltzeitpunkte, abgelegt werden, einer Speichereinheit CAR DATA (10), in die aktuelle Fahrzeugdaten, umfassend den Füllstand des Tanks abgelegt werden,
• – einer Verarbeitungseinheit (11), die mit den neun zuvor genannten Systemkomponenten (2, 3, 4, 5, 6, 7, 8, 9, 10) gekoppelt ist, in welcher eine digitale Straßenkarte hinterlegt ist, sowie die empfangenen Daten erfasst, ausgewertet und für die Speicherung in den Speichereinheiten I, bzw. II aufbereitet werden, die eigenen Daten zur Übermittlung zusammengestellt werden,

wobei das Navigationssystem dazu ausgebildet ist, in einem Netzwerkverbund mit gleichartigen Navigationssystemen anderer Fahrzeuge betrieben zu werden, wobei jedes Fahrzeug im Netzwerk an alle anderen Fahrzeuge im Netzwerk Daten sendet und von allen anderen Fahrzeugen im Netzwerk Daten empfängt, außer diesen Daten keine weiteren Verkehrsinformationen erhalten werden, die empfangenen und gesendeten Daten lediglich aus einem anonymisierten und für ein bestimmtes Fahrzeug gleich bleibenden Fahrzeugcode – welcher auch eine Information über die Art des Fahrzeugs enthält – sowie den GPS-Positionsdaten bestehen und von allen Netzwerkmitgliedern diese Daten in kurzen Zeitintervallen im Minutenbereich gesendet werden und weiterhin die empfangenen Daten derart gefiltert werden, dass nur die Daten von Fahrzeugen in einem bestimmten Betrachtungsbereich in der Umgebung des eigenen Fahrzeugs gespeichert und verarbeitet werden, wobei das Navigationssystem die befahrene Route, sowie sämtliche ermittelten Alternativrouten unter ökologischen Gesichtspunkten bewertet, welches dadurch geschieht, dass aus der Kraftstoffverbrauchsfunktion des eigenen Fahrzeugs und den von den anderen Fahrzeugen im Netzwerkverbund übermittelten Geschwindigkeiten der voraussichtliche Kraftstoffverbrauch auf der befahrenen Route, sowie auf den ermittelten Alternativrouten ermittelt wird und dem Fahrer angezeigt wird, welche Route voraussichtlich den geringsten Kraftstoffverbrauch aufweist.The vehicle navigation system according to the invention ( 1 ) consists

• An input unit ( 2 ) for entering the start and end point as well as vehicle-specific data for the vehicle and further parameters,
• - an output unit ( 3 ) for the output of evaluated and prepared data,
• A receiving unit ( 4 ) for receiving vehicle data of other vehicles,
• A transmission unit ( 5 ) for the transmission of own vehicle data to other vehicles,
• - a GPS module ( 6 )
• A storage unit I ( 7 ) in which the received vehicle data are stored,
• A storage unit II ( 8th ), in which data records of historical progressions of traffic impairments and the data of the individual journeys with respective consumption values are stored,
• A memory unit III ( 9 ), in which vehicle-specific data for the vehicle, including engine codes, fuel consumption function, optimal shift times, are stored, a memory unit CAR DATA (FIG. 10 ), in which current vehicle data, including the fill level of the tank are stored,
• A processing unit ( 11 ) with the nine system components mentioned above ( 2 . 3 . 4 . 5 . 6 . 7 . 8th . 9 . 10 ), in which a digital road map is stored, as well as the received data are recorded, evaluated and processed for storage in the storage units I, or II, the own data are collected for transmission,

wherein the navigation system is adapted to be operated in a network with similar navigation systems of other vehicles, each vehicle in the network sends data to all other vehicles in the network and receives data from all other vehicles in the network, unless this traffic data is no further traffic information , the received and sent data only from an anonymized and for a particular vehicle consistent vehicle code - which also a Information about the type of vehicle contains - as well as the GPS position data consist of and all network members this data in short time intervals in the minute area are sent and further the received data are filtered so that only the data of vehicles in a particular viewing area in the environment stored own vehicle and stored, the navigation system evaluated the route used, as well as all alternative routes determined from an ecological point, which is characterized in that from the fuel consumption function of the own vehicle and transmitted from the other vehicles in the network network the estimated fuel consumption on the traveled Route, and determined on the determined alternative routes and the driver is displayed which route is expected to have the lowest fuel consumption.

In 1 This vehicle navigation system is shown in a simplified diagram. The vehicle navigation system operates exclusively in a network with the same navigation systems as other vehicles, with each vehicle in the network sending data to all other vehicles in the network and receiving data from all other vehicles in the network. There are records of the shape

(1) vehicle code (with vehicle type) / position (GPS) / time / speed

generated and stored in the memory unit I. In this case, the average speed for a section is determined with the aid of the position data and the time difference between two consecutive entries of one and the same vehicle. DE 10 2007 032 956 B4 describes this in detail, as well as the filtering of data and navigation in the network. The navigation system continues to be equipped with artificial intelligence in traffic flow analysis, as in DE 10 2009 020 054 B3 specified. The following statements are based on these developments.

For all vehicle types, environmentally relevant data is stored in memory unit III for all engine equipment. Through the introduction of this third memory unit, the three memories I, II and III are clearly separated from each other in their function and the contents of memory II and III can be used in other vehicles: the respective vehicle data memory III can be removed and the historical congestion , which are stored in memory II, can be used for the evaluation. Temporary data is stored and processed exclusively in memory I as well as in the CAR DATA memory.

The driven route as well as all determined alternative routes are subjected to an ecological evaluation. For this purpose, the system uses the data stored in memory unit III for the vehicle, in particular the fuel consumption function, which indicates the minimum achievable fuel consumption as a function of the speed, and current data from the CAR DATA memory and thus calculates the minimum fuel consumption.

In a model calculation, the following consumption function is specified by www.chemie.fu-berlin.de/chemistry/general/kfz-energetisch:

(2) Consumption (v) = av ² + bv + c + d / v

Generally it is assumed that the fuel consumption is proportional to the pollutant emissions. In (2) it is further assumed that at high speeds the air resistance dominates and the consumption thereby changes quadratically with the speed. Therefore, a second-order parabola at not too low speeds describes consumption. At low speeds, internal friction losses increase and power consumption and no-load losses are added. Therefore, the quadratic equation is supplemented by a term proportional to the reciprocal of the velocity.

In the fuel consumption function optimal switching times are required; You can imagine it as a smooth function of the fuel consumption functions for the individual gears. This optimization can be realized either by a corresponding, automatic transmission or by consumption-optimal switching of the driver. Information on the optimum switching times can be taken from memory unit III; Numerous vehicles with manual transmission already give this information today. Patent literature on this subject has been given in the prior art. The actual consumption is measured by the level of the tank. This data can be transmitted, for example, from the on-board computer to the CAR DATA memory. The system compares the actual fuel consumption with the consumption function at regular time intervals; Differences above a certain height inform the driver, so that he may be able to change his driving style.

Ecologically, it makes sense that a certain maximum speed is not exceeded; the fuel consumption function increases disproportionately for high speeds. One could assume the minimum of the consumption function and a percentage of this consumption From this, the highest achievable with this consumption target speed could be determined by means of the fuel consumption function and the driver will be given an indication when it exceeds this speed.

Decentralized recording of the speeds of all relevant vehicles in the vicinity of their own vehicle, a combination of these speeds for different distances intervals can be made with their own fuel consumption function and calculated the consumption that would have on the used, as well as on the alternative routes. If there is a traffic jam, the system also uses information from storage unit II to forecast the congestion on the route being traveled. This will allow the driver to see whether it is reasonable for fuel consumption to stay in traffic or choose an alternative route; staying in a traffic jam can make sense from an ecological point of view.

The evaluation of the route and the alternative routes just described can also be carried out by the system without the existence of a traffic jam situation. In addition to the determined and recommended driving route with minimal fuel consumption, the fastest route can also be determined and evaluated ecologically. If the difference exceeds a certain altitude, the driver is shown how much additional fuel would be consumed on the fastest route compared to the proposed route.

At the end of the journey, a data set is generated which sets the actual fuel consumption, which is determined via the fill level of the tank, in relation to the optimum consumption calculated from the fuel consumption function and stores it in memory unit II. The data structure looks like this:

(3) Date / total travel time / length of the route / quotient of actual and calculated minimum fuel consumption

The determined quotient can be the basis for a bonus system, for example in the motor vehicle tax.

It would be conceivable, for example, that motorists receive a discount if they prove that their driving style is associated with minimum consumption values. This could be done by adding the values from dataset (3) for a calendar year and comparing them with the total mileage of the motor vehicle - to ensure that the system was also used consistently - to then send the average annual quotient to the tax authority.

embodiment

In the following an embodiment of the invention is presented. 1 shows the navigation system ( 1 ) in a schematic representation. In the input unit, the start and end point, the vehicle type, and other parameters are entered. At regular time intervals, the position of the vehicle is monitored by GPS ( 6 ) and to the processing unit ( 11 ) forwarded. This prepares the GPS position data together with a consistent code for your own vehicle for shipment to the other vehicles in the network network on The transmission of data is done by the transmitting unit ( 5 ). Of the other vehicles participating in the network network, the reception unit ( 4 ) Receive data; these are sent to the processing unit ( 11 ) and the time of data retention is attached. If a vehicle sends again, the current distance and the last obtained position data with the help of the digital map, the distance traveled, and from the time difference of the two entries, the average speed for this distance interval in the processing unit ( 11 ) determined; the speed value is added to the current data set and the data set extended at time and average speed in the memory unit I ( 7 ) filed. If there is a traffic congestion, the length of the respective vehicle chains is determined for different speed values - starting with the slowest speed at intervals of 5 km / h or 10 km / h up to 80 km / h - and stored in memory unit II ( 8th ) stored together with the time and an identification number of the traffic impairment. After the traffic disruption has ended, a data record which summarizes the event and is required for later comparisons and analyzes is generated and likewise stored in the memory unit II (FIG. 8th ) filed. The originally calculated route as well as the alternative routes calculated in the course of the journey are displayed on the output unit ( 3 ), together with the environmental assessments made using the storage unit III ( 9 ) and the fuel consumption function stored in the CAR DATA memory ( 10 ) available actual consumption data. If necessary, tips for optimizing the driving style are also issued. Finally, at the end of each journey, a record is generated which sets the actual fuel consumption in relation to the calculated minimum; this value is also stored in memory unit II ( 8th ) filed.

LIST OF REFERENCE NUMBERS

1

navigation system

2

input unit

3

output unit

4

receiver unit

5

transmission unit

6

GPS module

7

Storage unit I

8th

Storage unit II

9

Storage unit III

10

CAR DATA memory

11

processing unit

Claims (3)

Navigation system ( 1 ) for a vehicle, comprising - an input unit ( 2 ) for input of start and end point as well as vehicle-specific data for the vehicle and further parameters, - an output unit ( 3 ) for the output of evaluated and prepared data, - a receiving unit ( 4 ) for receiving vehicle data of other vehicles, - a transmitting unit ( 5 ) for the transmission of own vehicle data to other vehicles, - a GPS module ( 6 ), - a memory unit I ( 7 ), in which the received vehicle data are stored, - a memory unit II ( 8th ), in which data records of historical progressions of traffic impairments and the data of the individual journeys with respective consumption values are stored, - a memory unit III ( 9 ), in which vehicle-specific data for the vehicle including engine codes, fuel consumption function, optimal shift times, are stored, - a memory unit CAR DATA ( 10 ), in which current vehicle data, including the fill level of the tank, are stored, - a processing unit ( 11 ) with the nine system components mentioned above ( 2 . 3 . 4 . 5 . 6 . 7 . 8th . 9 . 10 ), in which a digital road map is stored, as well as the received data are detected, evaluated and processed for storage in the storage units I, II, the own data for transmission are compiled, the navigation system is adapted to operate a network with similar navigation systems of other vehicles, each vehicle in the network sends data to all other vehicles in the network and receives data from all other vehicles in the network, except this data is no further traffic information, the received and sent data only an anonymized and for a particular vehicle consistent vehicle code - which also contains information about the nature of the vehicle - and the GPS position data consist of all network members, this data in short time intervals in the minute range are sent and on the received data are filtered such that only the data of vehicles in a particular viewing area are stored and processed in the environment of the own vehicle, characterized in that the navigation system evaluates the traveled route as well as all determined alternative routes from an ecological point of view happens that from the fuel consumption function of the own vehicle and the transmitted speeds of the other vehicles in the network, the estimated fuel consumption on the traveled route, as well as on the determined alternative routes is determined and the driver is displayed which route is expected to have the lowest fuel consumption. Navigation system according to claim 1, characterized in that in the presence of congestion for the congestion on the traveled route and information about historical congestion patterns from memory unit II are taken into account. Navigation system according to claim 1 or 2, characterized in that the actual fuel consumption, which is determined via the fill level of the tank, is set in relation to the calculated from the fuel consumption function consumption to take the determined quotient as the basis for a bonus system for the motor vehicle tax ,

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