Audi Ag

Markus Fischer

Christian Glück

Thomas Hackner

Viktor Kell

A method for operating a motor vehicle including a drive mechanism having at least a first drive unit and at least a second drive unit is provided. The method includes providing a drive torque directed at the driving of the motor vehicle in a first setting of the drive mechanism only by means of the second drive unit and in a second setting by means of both drive units, wherein upon exceeding a start-up threshold value by a demanded preset power there is a switching from the first setting to the second setting, and upon falling below a shut-off threshold value by the demanded preset power there is a switching from the second setting to the first setting. It is provided that the start-up threshold value and/or the shut-off threshold value is determined in dependence on a driving resistance of the motor vehicle and/or a vehicle weight of the motor vehicle. A motor vehicle employing the method is also provided.

Method for operating a motor vehicle and the corresponding motor vehicle

A method for providing a power supply for at least one electrically heatable catalyst of a motor vehicle situated in an exhaust gas tract, wherein the motor vehicle comprises a first battery, by means of which a first voltage Uis generated, and a second battery, by way of which a second voltage Uis generated, wherein the at least one catalyst during a start phase immediately following the start of an internal combustion engine of the motor vehicle is supplied by a power Pprovided by the first battery such that the voltage Uof the first battery is imposed on the at least one catalyst, wherein the at least one catalyst is additionally supplied during the start phase by a power Pprovided by the second battery such that the voltage Uof the second battery is transformed by a DC converter to the value of the voltage Uwhich is imposed on the at least one catalyst.

Method for providing a power supply for at least one electrically heatable catalyst of a motor vehicle situated in an exhaust gas tract, and a motor vehicle comprising at least one electrically heatable catalyst situated in an exhaust gas tract of the motor vehicle

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Neuburg, Germany

Markus Fischer