Abstract: A method for adjusting a clock on board a motor vehicle, the clock providing an actual time for functions of the vehicle, the vehicle connected via wireless communication to a data server, the method including: the server transmitting a sequence of consecutive actual-time values, separated from one another by a fixed time interval; the vehicle receiving the actual-time values shifted by an unknown and variable time of flight between transmission and reception; for each received actual-time value: calculating a difference between an actual-time value received at a given instant and an actual-time value received at a previous instant; calculating a discrepancy between the calculated difference and the fixed time interval; calculating a cumulative disparity, consisting in summing the discrepancy calculated for a time value received at one instant and a time value received at the previous instant; determining the actual time for adjusting the on-board clock according to the disparity.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: In a system for harmonizing a motor vehicle's status information (S1) between at least two ID transmitters (5, 6, . . . ) of a vehicle-accessing device, the vehicle status (S1), together with a reference time (t1), corresponding to the vehicle status (S1), of a reference timing element of a vehicle-side control unit (2) can be sent by the unit via at least one transceiver unit (3) to at least one first mobile ID transmitter (5) over a first radio transmission (4) and stored; and the vehicle status (S1) can be sent over a second radio transmission (7) from the first ID transmitter (5) to at least one second ID transmitter (6, . . . ) and stored. This is advantageous in that an ID transmitter (6) can obtain information about the vehicle status S1 not only via the vehicle (1) itself but also via another ID transmitter (5). The invention is especially suitable for accessing and locking systems for motor vehicles.

Abstract: An identification arrangement (IA1) for a vehicle (FZ1) has a vehicle-side transmitting/receiving device (SE1) for receiving an identification signal (IDS) containing an identification code (CO). The identification arrangement also has a control and evaluation device (ST1) for checking the identification code of the identification signal, as well as for outputting a control signal (LSS, ASS) for the purpose of activating a vehicle function device (BL1, HU1) such as a turn signal indicator device if the identification code was recognized as valid, or for prompting the transmitting/receiving device to retransmit the received identification signal if the identification code was recognized as invalid. In this way it is possible for an identification signal transmitted by an identification transmitter, if recognized as invalid by the identification arrangement of the vehicle, to be transmitted to one or more further vehicles in order to be checked there.

Abstract: At first, a communication connection is established between a communication terminal KE_B of an authorized user of the authorization data BD and a service control center SZ. A mobile communications connection is established between the service control center SZ and a communication device KE_SG—1 of the access arrangement ZAO after successful identification of the user. If the service control center SZ has been successfully identified the authorization data BD is updated in the memory SP of the controller SG of the access arrangement ZAO. The authorization data BD in an access arrangement ZAO in a vehicle can thus be updated at any time without the assistance of a specialist workshop.

Abstract: 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.

Abstract: 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.

Abstract: In a system for harmonizing a motor vehicle's status information (S1) between at least two ID transmitters (5, 6, . . . ) of a vehicle-accessing device, the vehicle status (S1), together with a reference time (t1), corresponding to the vehicle status (S1), of a reference timing element of a vehicle-side control unit (2) can be sent by the unit via at least one transceiver unit (3) to at least one first mobile ID transmitter (5) over a first radio transmission (4) and stored; and the vehicle status (S1) can be sent over a second radio transmission (7) from the first ID transmitter (5) to at least one second ID transmitter (6, . . . ) and stored. This is advantageous in that an ID transmitter (6) can obtain information about the vehicle status S1 not only via the vehicle (1) itself but also via another ID transmitter (5). The invention is especially suitable for accessing and locking systems for motor vehicles.

Abstract: A method and a device for executing a method for localization of at least one mobile transceiver embodied as an ID generator, especially as a vehicle key, in relation to a further transceiver device embodied as a base station. A request signal with at least one item of threshold information for the ID generator is transmitted by the base station. The request signal is received, if at all, by the ID generator. The field strength of the request signal is measured and compared to the at least one item of threshold information transmitted along with it and a corresponding response signal being output by the ID generator depending on the comparison.

Abstract: 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.

Abstract: 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.