Abstract: A drive device for an all-wheel drive, two-track motor vehicle, in the drive train of which a first motor vehicle axle and, via a center clutch, a second motor vehicle axle are driven permanently by a drive assembly in driving operation. In the closed state of the center clutch, the second vehicle axle is engaged with the drive train, and, in the open state of the clutch, the second vehicle axle is decoupled from the drive train. In a driving situation with engaged all-wheel drive as well as with axle friction coefficients of varying size, a greater wheel torque can be taken up at the vehicle axle with a large axle friction coefficient than at the vehicle axle with a small axle friction coefficient, and a control instrument is provided, which, for engine torque limitation, limits the drive assembly to a maximum allowed engine torque.

Abstract: A drive device for an all-wheel drive, two-track motor vehicle, in the drive train of which a first motor vehicle axle and, via a center clutch, a second motor vehicle axle are driven permanently by a drive assembly in driving operation. In the closed state of the center clutch, the second vehicle axle is engaged with the drive train, and, in the open state of the clutch, the second vehicle axle is decoupled from the drive train. In a driving situation with engaged all-wheel drive as well as with axle friction coefficients of varying size, a greater wheel torque can be taken up at the vehicle axle with a large axle friction coefficient than at the vehicle axle with a small axle friction coefficient, and a control instrument is provided, which, for engine torque limitation, limits the drive assembly to a maximum allowed engine torque.

Abstract: A motor vehicle automatic gearbox, with infinitely-variable ratio, may be operated in a constant speed mode, or in an acceleration mode in which the motor revolution speed is increased or reduced in steps.

Abstract: The invention relates to an automatic gearbox, for a motor vehicle, with infinitely-variable ratio, which may be operated in a constant speed mode, or an acceleration mode, whereby the revolution speed in the acceleration mode can be increased or reduced in steps.

Abstract: Disclosed is a motor vehicle with an automatic gearbox, a gearbox control unit comprising several driving programs which control the gear switching operation and a selection lever for manual selection between a normal D driving program with automatic gearbox adjustment and a sporty S driving program. The motor vehicle also includes automatic gearbox adjustment and/or a manual driving program with manual gearbox adjustment. The gearbox control unit (3) is designed to automatically change from the S driving program or the manual driving program to the D driving program, depending on at least one operating parameter of the vehicle (1).