Keyless access control device for motor vehicles has control element(s) protected against actuation by movable mechanical cover until reception of code message contg. coarse identification

摘要

The device has a transmitter-receiver (2) associated with the vehicle (1) and a mobile transponder (9) that exchange code signals for performing the bi-directional question and answer dialogue for checking access authorization. A controller (3) works in conjunction with at least one electronic switch (6',7',8') influenced by a control element (6-8). The control element(s) is protected against actuation by a movable mechanical cover until the reception of a first code message contg. a coarse identification of the authorized user.