Marquardt Gmbh

Daimler Chrysler Ag

Johannes Mattes

Michael Geber

Matthias Reinhardt

Karl Mueller

Dietmar Weisser

August Geiger

Andreas Pohlmann

Marcus Eberhardt

Markus Ruther

Hubert Willmann

Uwe Hipp

Wolfgang Stehle

Karl Müller

Andreas Hamma

Karl M&uuml;ller

Klaus-Peter Vogler

Uwe Freyholdt

Jörn Ohle

Alfons Weber

Lothar Biselli

Ralf Maler

Juergen Keller

Uwe Schwalm

Armin Stummvoll

A locking system for providing authorization to access and drive a motor vehicle has a first control device for unlocking and locking the car doors, the ignition lock, the steering wheel lock, etc. Additionally, the locking system has a second device, which is an electronic key or an identifier. The two devices have transmission means and/or receiving means for electromagnetic signals with frequencies &#x3bd; lying in a frequency band between two cut-off frequencies &#x3bd;a, &#x3bd;b. At least one of the signals, transmitted between the devices, is a coded operating signal for authenticating the second device. The actual frequency &#x3bd;i with which the transmission means of the second device is operated is stored in a storage means of the first device.

Locking system, in particular for a motor vehicle

A system for automatic access or driving authorization for a motor vehicle includes a first device in the form of a control device having at least two states for engaging and disengaging vehicle door locks, an immobilizer, or the like. An associated second device is provided in the form of an electronic key, an ID transmitter, a chip card or the like. Both devices have means for transmitting or receiving signals, including a coded operating signal for authenticating the second device, so that a change in the state of the first device can be implemented when the second device is authorized. Before the second device is first activated, it is in a sleep state in which operation-independent function is not permitted and energy consumption is reduced. During a first operator-dependent authentication, the second device is changed over from the sleep state into a standby state in which an operation-independent function is at least partially made possible.

Locking system for a motor vehicle

An electronic key for use with a vehicle locking system controls at least one of a door locking feature and an ignition lock feature on the vehicle. The electronic key has a transmitter/receiver for transmitting at least one coded operating signal generated by the electronic key and transmitted from the electronic key to the locking system to activate at least one function of the locking system upon positive evaluation of the transmitted operating signal by the locking system. Actuating members are provided on the key and operated by the user to cause the transmitter/receiver to transmit the coded operating signal, and the activating elements are also adapted for the user to enter an individual code. A circuit is provided for receiving the entered individual code and comparing it with a programmed individual code and, upon entry of the programmed individual code being detected, changing the key over from a first, activated state in which transmission of the coded operating signal is prevented to a second, inactivated state in which transmission of the coded operating signal is permitted.

Electronic key

Growing community of inventors

Fridingen, Germany

Johannes Mattes