| 摘要 |
The invention relates to a device for closing and/or opening, in particular for an access and or driving authorization and/or for other services in a motor vehicle, such as a keyless entry/go functionality for a radio remote control or the like, that allows a large range and a long battery life of the second unit, having a first unit in the motor vehicle and having an associated, second unit such as an electronic key, an ID transponder, a smartcard or the like, wherein, for the intended operation thereof, the two units have transmitters and/or receivers for electromagnetic signals. This is achieved in that the first unit sends a cyclically repeated signal for the activation and/or authentication of the second unit in a first data protocol within a first transmission time interval and having a first cycle time. |
