Daimler Ag

Other

Daimler-benz Ag

Herges, Peter

Peter Herges

Joerg Huber

Bernd Knoff

Stefan Albrecht

Michael Hofmann

Roland Fischer

Henning Wallentowitz

Karl-Heinz Richter

Axel Willikens

Jörg Huber

Rudolf Hoernig

Roland Roessler

David J Skiff

Dennis Weigel

John A Wilke

Karl-Heinz Buechle

A method for detecting arcs in a DC circuit, having a detection conductor, which is routed at least along a conductor of the DC circuit, which carries an electric voltage and is to be monitored. In this connection, a voltage signal that refers to a potential of the DC circuit is coupled into the detection conductor at an incoupling point via a series resistor, the voltage signal is coupled out again at an outcoupling point of the detection conductor, the voltage signal before the series resistor is compared to the voltage signal at the outcoupling point, and a conclusion is drawn that an arc has occurred when the voltage signal at the outcoupling point deviates from the voltage signal before the series resistor by more than a predetermined amount. This invention also relates to a device for carrying out the method. The method and the device permit a quick, reliable detection of an arc in a DC circuit.

Method and device for detecting arcs

An electrically drivable motor vehicle with at least two parallel connectable vehicle batteries is provided with an electronic circuit arrangement. The electronic circuit arrangement includes a number of electronic load interrupter switches corresponding to the number of vehicle batteries, via which the vehicle batteries can be connected through individually or together to an electrical consumer. The load interrupter switches respectively comprise two power branches arranged anti-parallel to each other.

Electrically drivable motor vehicle with two anti-parallel power branches

The invention relates to an apparatus for finding a parked vehicle again. According to the invention, a portable unit is provided with a pressure sensor whose signals can be evaluated by an evaluation and control unit in order to determine the current air pressure, with the evaluation and control unit evaluating the determined air pressure in order to determine altitude, and storing a first air pressure value as a reference value at a predeterminable first time, which reference value represents an instantaneous altitude of a geographic position of the parked vehicle, with the evaluation and control unit estimating a height difference between a current geographic position of the portable unit and the geographic position of the parked vehicle at a second time, and/or continuously from a pressure difference between the determined current air pressure value and the reference value.

Arrangement for locating a parked vehicle

Apparatus for the automatic engagement and disengagement of the drive components of a motor vehicle, particularly of the drive of at least one additional axle and/or of locks for auxiliary gear and/or differential gear. The apparatus has sensors for sensing the rotary speeds of the wheels and the steering angle of the vehicle and a control unit which activates the drive components individually, simultaneously or in a given sequence as a function of: The travelling speed; the vehicle acceleration; the slip of the wheels; and the movement condition of the vehicle as a function of the steering angle. The apparatus also has an adaptively operating matching electronic system for accounting for the rotary speeds of the wheels and for the steering angle. An advantage of this apparatus is the engaging of required drive components automatically with narrow limit values and tolerances in necessary situations.

Apparatus for the automatic engagement and disengagement of drive

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Stuttgart, Germany

Peter Herges