Abstract: A first electric machine is controlled by a first pulse-width modulated control signal output by a first inverter and having a first signal parameter, and a second electric machine is controlled by means of a second pulse-width modulated control signal output by a second inverter and having a second signal parameter. The first signal parameter is output from the first inverter to the second inverter via a separate synchronization line. A third pulse-width modulated control signal having a third signal parameter is modulated by the second inverter. The third signal parameter is determined based on the first signal parameter and a predeterminable synchronization parameter. The third pulse-width modulated control signal having the third signal parameter is output by the second inverter to the second electric machine. The first pulse-width modulated control signal and the third pulse-width modulated control signal have a phase relationship predeterminable by the predeterminable synchronization parameter.

Abstract: The invention relates to a method for protecting a battery device (100), in particular an electrode of the battery device (100), having the following steps: determining at least one electrical battery parameter (EBP) of the battery device (100), determining an operating parameter (BP) of an operating current (IB) of the battery device, calculating a disturbance parameter (SP) for a disturbance current (IS) on the basis of the operating parameter (BP), generating the disturbance current (IS), and applying the disturbance current (IS) to the operating current (IB).

Abstract: The invention relates to a method for checking a protection method for protecting a battery device (100), in particular an electrode of the battery device (100), comprising the following steps: monitoring at least one electrical battery parameter (EBP) of the battery device (100); monitoring at least one operating parameter (BP) of an operating current (IB) of the battery device (100); monitoring at least one disturbance parameter (SP) of a disturbance current (IS) of the battery device (100); comparing the monitored disturbance parameter (SF), the monitored operating parameter (BP) and/or the monitored battery parameter (EBP) with at least one comparison parameter (VP) based on the battery parameter (EBP) and/or on the operating parameter (BP).

Abstract: A hybrid drive apparatus has a first drive unit, a second drive unit, and a clutch by way of which the first drive unit and the second drive unit can be coupled. A method for controlling the hybrid drive apparatus includes decoupling the first drive unit and the second drive unit from each other, and operating the first drive unit at a no-load operating point. A first torque of the first drive unit is determined at the no-load operating point. The first and second drive units are coupled by way of the clutch. The first drive unit is then motored by the second drive unit at an operating point which corresponds to the no-load operating point. A second torque is determined, which is produced by the second drive unit, in order to motor the first drive unit at the operating point. Finally, a control of at least one of the drive units is adapted based on the difference between the first torque and the second torque.

Abstract: A hybrid drive apparatus has a first drive unit, a second drive unit, and a clutch by way of which the first drive unit and the second drive unit can be coupled. A method for controlling the hybrid drive apparatus includes decoupling the first drive unit and the second drive unit from each other, and operating the first drive unit at a no-load operating point. A first torque of the first drive unit is determined at the no-load operating point. The first and second drive units are coupled by way of the clutch. The first drive unit is then motored by the second drive unit at an operating point which corresponds to the no-load operating point. A second torque is determined, which is produced by the second drive unit, in order to motor the first drive unit at the operating point. Finally, a control of at least one of the drive units is adapted based on the difference between the first torque and the second torque.

Abstract: The invention relates to a method for the automatic starting and stopping of an internal combustion engine. Release of a stop mode for the internal combustion engine is enabled depending on a time period that depends on the temperature difference between the temperature prevailing in the interior of a motor vehicle and the desired temperature set by the driver.

Abstract: In a brake system for a hybrid motor vehicle, while it is set to pure electric drive mode, the crankshaft of the combustion engine is driven temporarily with the aid of at least one electric motor for generating reduced pressure in the intake manifold for supplying reduced pressure of the additional vacuum reservoir to the vacuum chamber of its brake booster only when, during or following the single or multiple actuation of the brake pedal thereof, the reduced pressure in the vacuum reservoir of the brake booster drops to a predeterminable lower limit or falls below the lower limit.

Abstract: The invention relates to a method for the automatic starting and stopping of an internal combustion engine. Release of a stop mode for the internal combustion engine is enabled depending on a time period that depends on the temperature difference between the temperature prevailing in the interior of a motor vehicle and the desired temperature set by the driver.