Siemens Aktiengesellschaft

Continental Automotive Gmbh

Stefan Hammes

Frank Fischer

Gregor Kuchler

Herbert Froitzheim

Armin Daiss

Thomas Reisinger

Ulrich Emmerling

Guy-Aymar Chakam

Wolfgang Piesch

Robert Obermaier

Thomas Georgi

An entry and starting system in an object has a control and transmission unit configured to use a radio link to interchange at least one radio signal and an ultrasonic link to interchange at least one ultrasonic signal with a portable electronic device. The control and transmission unit sets up a radio link to the portable electronic device and uses the electronic device via the radio link to stipulate at least one relevant parameter for a subsequent ultrasonic link. The control and transmission unit is additionally configured so as, following the stipulation of the parameters, to set up an ultrasonic link according to the previously determined parameters. The entry and starting system checks an authorization of the portable electronic device, the portable electronic device being detected as authorized if the at least one relevant parameter of a subsequent ultrasonic link is concordant with the at least one stipulated parameter.

Entry and starting system and method for entry and starting verification

The present disclosure relates to a method and devices for transit-time-based distance measurement and the teachings may be applied to locating keys for a motor vehicle. In one embodiment, a system for detecting the distance between a vehicle and an associated key may include: a transceiver associated with a vehicle; a key for the motor vehicle; and a processor configured to determine an estimated signal transit time between the transceiver and the key based at least in part on a ratio of a length of two time intervals between the transmission or reception of a message between the transceiver and the key.

Key location system

In a system for harmonizing a motor vehicle's status information (S) between at least two ID transmitters (, . . . ) of a vehicle-accessing device, the vehicle status (S), together with a reference time (t), corresponding to the vehicle status (S), of a reference timing element of a vehicle-side control unit () can be sent by the unit via at least one transceiver unit () to at least one first mobile ID transmitter () over a first radio transmission () and stored; and the vehicle status (S) can be sent over a second radio transmission () from the first ID transmitter () to at least one second ID transmitter (, . . . ) and stored. This is advantageous in that an ID transmitter () can obtain information about the vehicle status Snot only via the vehicle () itself but also via another ID transmitter (). The invention is especially suitable for accessing and locking systems for motor vehicles.

System for harmonizing a motor vehicle's status information between at least two ID transmitters

A device and a method for determining a wheel position on a vehicle, for example an automobile. Long-wave antennae of a vehicle access system already present in the vehicle transmit a signal, which is measured by a long-wave receive unit of a tire electronic system and used to detect the position of the wheel on the vehicle. The electrical or magnetic receive field strength of the signal of a specific long-wave antenna for example is in particular detected by a tire electronic system and used to determine the position of the wheel on the vehicle.

Device and method for determining a wheel position

A receiving antenna with a rigid directional pattern, that is to say with an anisotropic receiving sensitivity of the receiving antenna, is used for localizing a wheel electronics unit in a wheel of the motor vehicle. Suitable evaluation of the received electromagnetic signals is provided in order to obtain a functionality achieved by way of the displacement or rotation of the directional antenna in the case of prior solutions. In this respect, a level of the received electromagnetic signal is compared with a predefined threshold value. As the result of the comparison, the wheel electronics unit is localized as being arranged in a wheel of the first wheel group or as being arranged in a wheel of the second wheel group.

Growing community of inventors

Wuppertal, Germany

Stefan Hammes