Daimler Chrysler Ag

Daimler Ag

Markus Krauss

Hermann Bosch

Anton Heni

Roland Kemmler

Horst Brinkmeyer

Hans-Christoph Wolf

Roland Bluemel

Ing Dietrich Sahm

Irmgard Heni, Legal Representative

The invention relates to an apparatus and a method for starting an internal combustion engine for a motor vehicle, wherein the internal combustion engine has an associated electrical machine () which is operated as a starter/generator. During starting, the electrical machine () is supplied with a voltage which is obtained from addition or from subtraction of the voltages which are produced on a first energy store () and the voltages which are produced on a second energy store ().

Drive system for a motor vehicle comprising an internal combustion engine and an electric motor

A circuit is provided for an alternator of a motor vehicle with the winding of the alternator consisting of two half-windings, with rectification of the voltages and currents at the outputs of the two half-windings taking place, with the outputs of one half-winding being connected with the inputs of a first rectifier, and with the outputs of the other half-winding being connected with the inputs of another rectifier, and with each output of one half-winding being connectable across the gaps of two switchable elements with two outputs of the other half-winding in each case such that when the gaps are bridged, the two half-windings are connected electrically in series. In a method for triggering the switchable elements, the individual thyristors are triggered in succession and/or only individual transistors are triggered, with this preferably taking place when a certain motor rpm is undershot. Diodes c an also be used instead of individual thyristors.

Circuit for an alternator of a motor vehicle and method for controlling

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Waeschenbeuren, Germany

Markus Krauss