Abstract: A method for operating a serial-parallel hybrid powertrain of a motor vehicle has the steps of mechanically decoupling the internal combustion engine from the wheels of the motor vehicle, accelerating the motor vehicle from a first speed to a second speed by means of the second electric machine, and increasing the speed n of the internal combustion engine from a first rotational speed to a second rotational speed. Increasing the speed of the internal combustion engine from the first rotational speed to the second rotational speed always takes place as a function of the increase in the speed of the motor vehicle from the first speed to the second speed. A motor vehicle may have such a serial-parallel hybrid powertrain.

Abstract: A method for operating a serial-parallel hybrid powertrain of a motor vehicle has the following steps: mechanically decoupling the internal combustion engine from the wheels of the motor vehicle, accelerating the motor vehicle from a first speed v1 to a second speed v2 by means of the second electric machine, and increasing the speed n of the internal combustion engine from a first rotational speed n1 to a second rotational speed n2. Increasing the speed n of the internal combustion engine from the first rotational speed n1 to the second rotational speed n2 always takes place as a function of the increase in the speed v of the motor vehicle from the first speed v1 to the second speed v2. The invention further relates to a motor vehicle having a serial-parallel hybrid powertrain.

Abstract: A method for operating a navigational system, especially a navigational system for a motor vehicle, having a memory, a display unit and at least one operating element, map data being loaded from a map data memory into the memory; the map data being subdivided into first map data and second map data; the first map data including geometric data of edges of a map network stored as graphs, and the second map data including topological data and applications being carried out using the first and/or second map data loaded into the memory.

Abstract: A method for coding interruptions along a route, on the basis of a digital map, items of information about interruptions in the direction along the route being taken into account and transmitted to the navigation system, wherein coded items of information about the existence or non-existence of interruptions on side roads or in intersections along the route are additionally transmitted. A method for dynamic route calculation in which coded items of information about the existence or non-existence of interruptions on side roads or in intersections along the direction of the coded route are transmitted and utilized for calculating a route.

Abstract: In a method for coding traffic messages on the basis of travel direction and for taking them into account in the route calculation using a navigation system, to further provide detection of the location of traffic disruptions while taking into account the direction of travel, a stretch of road made up of segments is coded, and an item of digital information is added to the coded stretch of road, which indicates that the traffic message is to be used only if all segments of the coded stretch of road are part of a travel route. In the process, the coded stretch of road is decoded and the digital information is evaluated in a navigation device.

Abstract: A method for operating a navigational system, especially a navigational system for a motor vehicle, having a memory, a display unit and at least one operating element, map data being loaded from a map data memory into the memory; the map data being subdivided into first map data and second map data; the first map data including geometric data of edges of a map network stored as graphs, and the second map data including topological data and applications being carried out using the first and/or second map data loaded into the memory.

Abstract: A digital map with line features is stored on a storage medium into parcels, each covering a certain area of the map. A parcel has around it standard border a border region bounded by an inner border and an outer border. A line feature crossing the standard border between two neighboring parcels is only divided into two new line features if it completely crosses the border region, i.e. if it crosses the outer border of both neighboring parcels.

Abstract: To supplement an electronic navigation system, for example associated with a locating map storing possible paths of a vehicle, two path sensors are provided, one (10) evaluating vehicle operating data and distance traveled, and the other (12) evaluating position of the vehicle with respect to the geomagnetic field. In accordance with the invention, and in order to eliminate drift errors of the vehicle operating sensor (10) and disturbances of the magnetic field sensed by the magnetic field sensor, the output signals from the vehicle operating sensor are differentiated to eliminate long-term drift, and the output signals from the field sensor are integrated to eliminate short disturbances, both the differentiation as well as the integration steps being carried out with respect to distance traveled and not with respect to time. The respectively differentiated and integrated signals are then combined in an adder (28) for application to a course or navigation computer of standard construction.

Abstract: In a method of and an apparatus for determining the position of a land vehicle by detecting and evaluating driving data and subsequent correction of the position calculated from the driving data by matching with data of a stored, digitized road network, the determination of the position is carried out in a very reliable manner. By dividing the digital road network into meshes defined according to surface area by covering it with a grid. The meshes in which the instantaneous position of the vehicle is located, are selected one after the other proceeding from a starting position, and the position calculated from the driving data is corrected at predetermined intervals to the possible and most probable position through the road network in the respective selected mesh and its proximate surrounding area.

Abstract: A method and a device for target tracking of land vehicles are suggested, in particular for use in heavily meshed city road systems. Thereby, a motor vehicle device is used with an input device for a desired target location and an output device for vehicle instructions. The vehicle location (determination of travel path and travel direction) is carried out by picking up and evaluating the wheel rotations of a nondriven vehicle axis.