Abstract: A method for operating a drive device of a motor vehicle, which includes at least one internal combustion engine and at least one electric machine, a driving resistance, in particular an uphill gradient, being ascertained and the internal combustion engine being operated as a function thereof. The internal combustion engine is operated as a function of a driving resistance to be expected, which is determined as a function of an instantaneous driving resistance. A drive device for a motor vehicle is also described.

Abstract: A control device for a hybrid drive, in particular for a hybrid drive of a motor vehicle having at least one combustion engine and at least one electric motor as driving motors, whose torques are coupled together to form a total torque. A controller is provided which generates an actuating signal for controlling the speed of each of the driving motors, a first actuating signal acting on the electric motor having a higher dynamic response than a second actuating signal acting on the combustion engine.

Abstract: In a method for operating a hybrid drive of a vehicle having at least one internal combustion engine and at least one first electric machine as drive machines of a first drive train of the vehicle, and an associated first transmission, the total torque of the drive machines is adapted in a shifting operation of the transmission in order to reduce the load at the transmission and/or in order to modify rotational speeds according to the new transmission ratio, and/or the torque gradient of the drive machines is restricted to a specifiable, maximum torque gradient of the resulting total torque of the drive machines of the first drive train in a transition between acceleration operation and trailing throttle operation.

Abstract: A method for operating a hybrid drive device of a motor vehicle that has at least two different drive aggregates, in particular an electric motor and an internal combustion engine, and having a clutch, the drive aggregates being capable of being operatively connected using the clutch. It is provided that, in a diagnostic and/or adaptation operating mode; the clutch is operated with a slippage. In addition, the present system relates to a hybrid drive device, a control device for a hybrid drive device, and a motor vehicle aggregate that has both the control device and the hybrid drive device.

Abstract: In a method for operating a hybrid vehicle, an idle first drive unit is started during the driving of the hybrid vehicle by transferring part of a torque from an operating second drive unit to the first drive unit. To minimize effects on the movement characteristics of the hybrid vehicle during starting and/or stopping of the first drive unit, a control unit is provided for influencing the torque of the operating second drive unit by at least one of the variables derived from the longitudinal movement of the hybrid vehicle.

Abstract: A method for recognizing unintended drive train responses of a motor vehicle includes at least one drive unit, in which at least one input variable of the motor vehicle and/or of the drive unit is input into the drive train, and at least one output variable is measured at the motor vehicle and/or the drive unit. In order to recognize an unintended drive train response early, the at least one input variable is supplied to a dynamic model which at least partially simulates the drive train of the motor vehicle, the dynamic model determining, based on the at least one input variable, at least one model output variable which is compared to the at least one measured output variable, and an unintended drive train response being deduced if there is a difference between the measured output variable and the model output variable.

Abstract: A method is provided for operating a hybrid drive of a motor vehicle which has a combustion engine, at least one electrical machine, and at least one electrical accumulator, the electrical machine and the electrical accumulator belonging to an electrical system of the motor vehicle. The following steps are provided for implementing the method: subdividing the operation of the electrical machine into adjacent subranges of a) transient compensation operation, b) boost and/or recuperation operation, and c) operation for maintaining the vehicle electrical system; assigning torque limits and/or power output limits of the electrical machine in at least two subranges; and, releasing and/or influencing the particular torque limits and/or power output limits of the subranges as a function of the current state of the electrical accumulator and/or of the electrical machine and/or of the vehicle electrical system.

Abstract: The invention relates to a method for operating a motor vehicle drive comprising at least one internal combusting engine (10), at least one electric machine (20) mechanically coupled to said internal combustion engine (10) and at least one power storage battery actively connectable to said electric machine (20) and to the internal combustion engine (1) in an on-board electric network, wherein said internal combustion engine (10) and electric machine (20) produces a nominal required drive torque (M) in a substantially common manner, the instant electromotive torque reserve (MEres) of the electric machines(s) (20) is determined and the internal combustion engine torque reserve is taken into account as a minimum reference torque reserve of the internal combustion engine for at least one or several internal combustion engines (10).

Abstract: A method for operating a hybrid vehicle, having at least one first drive unit and one second drive unit, the second drive unit being started by at least one portion of the drive torque provided by the first drive unit in that the clutch situated between the first drive unit and the second drive unit is brought from a disengaged state into a slipping state. To improve the driving comfort of the hybrid vehicle during a start or a stop of the internal combustion engine, at least two clutches are shifted into the slipping state for starting the second drive unit.

Abstract: A method for operating a motor vehicle having a hybrid drive, including a combustion engine having an engine management and at least one electro machine having a control unit, which is at least intermittently operated in an rpm-regulated manner and which is able to be in operative connection with a drive shaft of the combustion engine. For the closed-loop speed control of the electro machine, its torque is influenced by its rotational speed or a signal derived therefrom.

Abstract: In a method for operating a power-branching hybrid drive having at least one first and one second electric machine coupled via a transmission, as well as having an internal combustion engine which outputs a torque MVM, the electric machines and the internal combustion engine acting together, having their drives connected, the first electric machine is rotation speed-regulated, the second electric machine is torque-controlled, and the internal combustion engine is operated in a rotation speed-regulated manner.

Abstract: A method is for operating a vehicle having a hybrid drive, in which the hybrid drive has an internal combustion engine and at least one electric motor as drive units, and the units cooperate with one another. To achieve a negative drivetrain setpoint torque, the negative drivetrain setpoint torque is applied by the electric motor, and the internal combustion engine is operated to the greatest extent possible outside its overrun mode.

Abstract: A method for operating a drive device of a motor vehicle, which includes at least one internal combustion engine and at least one electric machine, a driving resistance, in particular an uphill gradient, being ascertained and the internal combustion engine being operated as a function thereof. The internal combustion engine is operated as a function of a driving resistance to be expected, which is determined as a function of an instantaneous driving resistance. A drive device for a motor vehicle is also described.

Abstract: A method for coordinating at least one drive unit of a vehicle, a control unit designed as a drive unit control unit (6, 8) being assigned to this at least one drive unit, a higher-level control unit (4) being provided, and information being exchanged between the control units, at least one operating parameter for an operating range of the at least one assigned drive unit being transmitted by at least one drive unit control unit (6, 8) to the higher-level control unit (4) for the purpose of carrying out the method, a setpoint operating point for the at least one drive unit being ascertained by the higher-level control unit (4) on the basis of the at least one received operating parameter, and the ascertained setpoint operating point being transmitted to the at least one drive unit control unit (6, 8) together with the at least one operating parameter.

Abstract: A method for changing a drive unit's mechanical coupling to a motor vehicle power train, which has at least two drive units, in which at least one first drive unit of the two drive units is coupled via various mechanical couplings, including mechanical transmission ratios, during the travel of the motor vehicle, a power or torque influence of the two drive units occurring if there is a change of the mechanical coupling. To ensure a change of the mechanical coupling without the vehicle occupants perceiving it, the change of the mechanical coupling of the first drive unit of the two drive units occurs in at least two operating modes, a first operating mode causing a slower operating point change with respect to time of the two drive units, while a more rapid operating point change as to time of the two drive units is provided in a second operating mode.

Abstract: In a method for operating a parallel hybrid drive of a vehicle, in particular of a motor vehicle, having an electric machine and an internal combustion engine, the internal combustion engine is started in the driving state of the vehicle with the aid of the electric machine by engaging a disconnecting clutch. It is provided that at least one performance quantity of the parallel hybrid drive is detected and compared with an appropriate model performance quantity of a model of the parallel hybrid drive, the model not including the internal combustion engine, and that a deviation resulting from the comparison is compensated for, at least partially, by the electric machine.

Abstract: A method and device for dynamic torque coordination of power units of a hybrid drive of a vehicle, in particular a motor vehicle. The method has a plurality of successive coordination stages, each coordination stage being assigned an operating range for at least one of the power units, and each coordination stage making at least one demand on a first power unit and/or a second power unit as a function of an overall setpoint torque requested from the hybrid drive, a subsequent coordination state having an enlarged operating range compared to a preceding coordination stage, and the subsequent coordination stage is used if the demand was unable to be satisfied within the operating range of the assigned coordination stage.

Abstract: A method is described for starting an internal combustion engine having an E-machine coupled to it in a motor vehicle, after the input of a certain torque command at a drive control of the internal combustion engine, the internal combustion engine being accelerated for the start by the E-machine, and the internal combustion engine being set by the drive control, via actuators, to specified characteristics values for the start. To reduce exhaust gas emissions at the start of the internal combustion engine, the internal combustion engine is accelerated by the E-machine, without the injection of fuel, until the engine torque that is able to be implemented by the internal combustion engine, essentially corresponds to the torque command, and the injection of fuel into the internal combustion engine is only then released.

Abstract: A method is described for operating a vehicle, in particular a hybrid vehicle, in which each of the two axles of the vehicle, which are not mechanically coupled, is driven by at least one drive unit, thus transmitting a torque to the wheels of the respective axle. To make optimal use of the different coefficients of friction of the wheels which occur with different roadway conditions, the rotational speeds of the wheels of both drive axles are ascertained and averaged, a difference being formed from the averaged rotational speeds of the two axles, respectively, and the torque on at least one axle being influenced based on this difference so that differences in the averaged rotational speeds of the wheels are counteracted. Instead of the rotational speed difference, the deviation of this rotational speed difference from a setpoint rotational speed difference may be used, for example, within the scope of ESP.

Abstract: A method for driving a hybrid vehicle during a load reversal includes: the application of a first torque on a first hybrid vehicle axle during an acceleration reversal; and the application of a second torque on a second hybrid vehicle axle during the acceleration reversal, a direction of action of the second torque being opposite to a direction of action of the first torque.