Daimler Ag

Andreas Miksch

Michael-Rainer Busch

Dirk Herbstritt

Andreas Hetzel

Method of detecting an unauthorized exchange of components in the case of a technical system, where the control unit () sends an encoded message () to a component () to be checked, in a data field of the message () a randomly generated or not easily reproducible value () being entered, which is used for checking the installed component (). The component () accesses an assignment field () and, as a result, assigns an identification () to each not easily reproducible or random value () transmitted together with the message (), and the component () transmits the identification corresponding to the value () back to the control unit (). The control unit () decides on the basis of the identification () whether the component () is that the component () which is authorized for use in the particular technical system.

Process for detecting defective component exchanges

A method and apparatus for detecting the presence of a prescribed heat exchanger, such as a catalytically active radiator, in a motor vehicle are performed during operation of the motor vehicle. The temperature of a heat-exchanger medium is observed together with further current operationally relevant parameters of the motor vehicle for a prespecified time window. An expected temperature gradient over time of the heat-exchanger medium is detected, as well as the current temperature gradient over time of the temperature of the heat-exchanger medium. The presence of a prescribed heat exchanger is detected taking into account the expected temperature gradient and the current temperature gradient.

Method and apparatus for detecting the presence of a prescribed heat exchanger

In a rolling-code based process and system for the unambiguous identification of serial numbers in a data communication system, least two subscribers each have an identical serial number set. The process includes a) the first subscriber transmitting a first challenge with respect to a serial number from the serial number set to the second subscriber; b) subscriber responding the second subscriber by a first response corresponding to the first challenge; generating an identification signal for the second subscriber which unambiguously identifies the second subscriber with respect to the first subscriber if the first response corresponds to the serial number expected on the basis of the first challenge of the first subscriber.

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Stuttgart, Germany

Andreas Miksch