Abstract: The invention relates to a drive device (8) for a motor vehicle (1) having two drivable wheels (6, 7) on a wheel axle (3), said drive device comprising an electric machine (9), which is designed as an asynchronous machine and which has at least one stator (10) and at least one rotor (11, 12), wherein the rotor (11, 12) is or can be operatively connected to at least one of the wheels (6, 7) in order to drive said wheel. According to the invention, the electric machine (9) has two rotors (11, 12), which can rotate independently of one another, each of which is or can be operatively connected to one wheel (6, 7) of the wheel axle (3), and a device for varying the electric rotor resistance of at least one of the rotors (11, 12).

Abstract: The invention relates to a method and a device for operating a drive train (101) of a hybrid vehicle comprising an electrical system (102), the drive train (101) having at least one vehicle drive wheel (105) in addition to one first electrical machine (104) and the first electrical machine (104) being connected to the electrical system (102). According to the invention, in order to stabilize the voltage of the electrical system (102), the first electrical machine (104) is operated without being coupled to the drive wheels (105) of the hybrid vehicle.

Abstract: The invention relates to a drive device (8) for a motor vehicle (1) having two drivable wheels (6, 7) on a wheel axle (3), said drive device comprising an electric machine (9), which is designed as an asynchronous machine and which has at least one stator (10) and at least one rotor (11, 12), wherein the rotor (11, 12) is or can be operatively connected to at least one of the wheels (6, 7) in order to drive said wheel. According to the invention, the electric machine (9) has two rotors (11, 12), which can rotate independently of one another, each of which is or can be operatively connected to one wheel (6, 7) of the wheel axle (3), and a device for varying the electric rotor resistance of at least one of the rotors (11, 12).

Abstract: A method and device for monitoring and controlling the regeneration of a particle filter in an exhaust gas duct of an internal combustion engine which has a three-way catalytic converter downstream of the particle filter, wherein the particle filter is regenerated by oxidative burning of the particles during a regeneration phase, wherein oxygen consumption is balanced, directly or indirectly, during the regeneration phase via the temporal variation of a first signal of a first lambda probe, which is arranged upstream of the particle filter, in comparison to the temporal variation of a second signal of a second lambda probe, which is arranged downstream of the particle filter. A lambda value of ?=1 is set downstream of the three-way catalytic converter during the regeneration of the particle filter by means of lambda control and the second lambda probe which is arranged downstream of the three-way catalytic converter.

Abstract: A method is introduced for heating an exhaust-gas aftertreatment system (15). The method has the following steps: detection of a necessity to heat (S1) the exhaust-gas aftertreatment system (15), and actuation (S5) of an electric motor (5) in such a way that the electric motor (5) drags the internal combustion engine (3) which produces exhaust gas. Here, the internal combustion engine (3) is held at a predefinable rotational speed by the electric motor (5).

Abstract: The invention relates to a method and a device for operating a drive train (101) of a hybrid vehicle comprising an electrical system (102), the drive train (101) having at least one vehicle drive wheel (105) in addition to one first electrical machine (104) and the first electrical machine (104) being connected to the electrical system (102). According to the invention, in order to stabilise the voltage of the electrical system (102), the first electrical machine (104) is operated without being coupled to the drive wheels (105) of the hybrid vehicle.

Abstract: A procedure for determining the proportion of components of a fuel mixture, which is boosted with a fuel pump, and a device for implementing the procedure are suggested. A measure for the power input of the fuel pump is detected, with whose aid the proportion of components of the fuel mixture is determined. By proceeding according to the invention a special sensor, which is susceptible to components of the fuel mixture can be waived.

Abstract: A method and device for monitoring and controlling the regeneration of a particle filter in an exhaust gas duct of an internal combustion engine which has a three-way catalytic converter downstream of the particle filter, wherein the particle filter is regenerated by oxidative burning of the particles during a regeneration phase, wherein oxygen consumption is balanced, directly or indirectly, during the regeneration phase via the temporal variation of a first signal of a first lambda probe, which is arranged upstream of the particle filter, in comparison to the temporal variation of a second signal of a second lambda probe, which is arranged downstream of the particle filter. A lambda value of ?=1 is set downstream of the three-way catalytic converter during the regeneration of the particle filter by means of lambda control and the second lambda probe which is arranged downstream of the three-way catalytic converter.

Abstract: A method and a device for controlling a drive train of a vehicle, in particular a hybrid vehicle, are described. The drive train includes at least two drive units. The one drive unit is an internal combustion engine, the other is an additional motor. A temperature value is recorded, which represents the exhaust-gas temperature of the internal combustion engine. The component for generating the drive torque with the aid of the additional motor is adjusted as a function of the exhaust-gas temperature, such that at higher exhaust-gas temperatures a greater component of the drive torque is generated with the aid of the additional motor than at lower exhaust-gas temperatures.

Abstract: The invention relates to a method for monitoring and controlling the regeneration of a particle filter in an exhaust gas duct of an internal combustion engine, wherein said regeneration of the particle filter takes place by means of an oxidative burning off of particles during a regeneration phase. Provision is made according to the invention for the internal combustion engine to be operated at a lean operating point at least intermittently during lean operating phases or during a mixture oscillation and for the regeneration of the particle filter to be monitored during the lean operating phases or during the mixture oscillation via the temporal course of a second signal of a second lambda probe disposed in the exhaust gas direction downstream of said particle filter or of a second parameter derived therefrom in comparison to the temporal course of a first signal of a first lambda probe disposed in the exhaust gas direction upstream of said particle filter or of a first parameter derived therefrom.

Abstract: The invention relates to a method and device for determining the composition of a fuel mixture made of one first fuel and at least one second fuel for operating an internal combustion engine, wherein said internal combustion engine has a fuel metering apparatus and at least one exhaust gas probe in an exhaust gas channel. According to the method of the invention, it is provided that the fuel mixture is at least temporarily supplied to the exhaust gas probe at least partially uncombusted, and the composition of the fuel mixture is determined from an output signal of the exhaust gas probe. According to the device of the invention, it is provided that the exhaust gas probe is situated proximal to the motor in the direction of the exhaust gas flow before a first catalytic converter, and the fuel mixture can be supplied at least partially uncombusted to the exhaust gas probe at least temporarily.

Abstract: A procedure for determining the proportion (z) of components of a fuel mixture (11), which is boosted with a fuel pump (12), and a device for implementing the procedure are suggested. A measure (p_KP) for the power input of the fuel pump (12) is detected, with whose aid the proportion (z) of components of the fuel mixture (11) is determined. By proceeding according to the invention a special sensor, which is susceptible to components of the fuel mixture 911) can be waived.