Abstract: In an automated split path transmission with at least six forward speeds and three characteristic transmission steps (sI, sII, sIII), which decrease with the height of the forward speed, one of the forward speeds is a direct gear and the power of a further forward speed passing through two constant gearsets of the split path group.

Abstract: In an automatic load shift transmission including a transmission output shaft arranged coaxially with respect to a twin clutch disposed at the transmission input side, a countershaft is provided comprising only fixed gears and all the freely movable gears and the shift elements are arranged on the shafts extending along the axis of the twin clutches and the input and output shafts.

Abstract: In a gear shift device for an automated shift transmission of a motor vehicle having a main transmission and an auxiliary group, wherein a series of gear shift elements, for example in the form of gear shift forks, have to be operated, piston cylinder units for shifting the main transmission are combined in a gear shift module and the piston cylinder units for shifting the auxiliary group are arranged spaced apart from the gear shift module of the main transmission but connected to the gear shift module via a fluid line.

Abstract: The invention is based on a drive train (10) of a motor vehicle in which a control device (16) limits an output torque of a drive machine (14) to a first maximum value or a second, higher maximum value. The object of the invention is to propose a drive train which permits low fuel consumption. According to the invention, the control device (16) has a signal transmitting connection to a roadway information device (camera 53) which supplies information relating to a profile of the roadway in front of the motor vehicle. The control device (16) can thus predictively change from the first maximum value to the second maximum value or carry out shifting back in the transmission (19). Use in a motor vehicle.

Abstract: In a method of operating a drive train of a motor vehicle including a drive motor with a multi-unit transmission including an unsynchronized main transmission and a synchronized output drive unit, wherein for performing a shift in the unsynchronized main transmission, a speed synchronization is carried out by means of the drive motor for the engagement of a target gear and, in an emergency mode of the drive motor, the following steps are performed: disengaging a clutch arranged between the drive motor and the main transmission setting a neutral position in the output gear unit, engaging the target gear, setting a drive position in the output drive unit and at least partially engaging the clutch.

Abstract: In a transmission for a motor vehicle of a reduction gearing design with power branching including a main shaft and a counter shaft, a first component transmission and a planetary gear unit, power is branched to the countershaft by the first component transmission in certain gears and recombined via the planetary gear unit and a direct power transmission path is provided wherein the countershaft is decoupled selectively by means of a control device.

Abstract: The invention relates to a method for operation of a drive train having a drive machine and an automatic, unsynchronized gearwheel variable-speed transmission, which can be connected to the drive machine by means of an automatic clutch. A control device carries out a selection process as a function of vehicle parameters and/or operating variables of the motor vehicle to determine whether a gear change of the unsynchronized gearwheel variable-speed transmission will be carried out with the clutch engaged or disengaged. In order to ensure reliable operation of the motor vehicle, for the method according to the invention, a gear change is carried out with the clutch disengaged in a time interval after initial starting up of the drive train and/or after starting of the drive machine and/or when a malfunction is identified in a component in the drive train.

Abstract: An automated change speed gearbox is provided.

Abstract: A gear wheel change transmission comprises a basic transmission and an auxiliary transmission of planetary wheel construction which is situated in series in the power flux. A retarder brake is geared up by the planet carrier of the auxiliary transmission via a power take-off with a planetary gear.

Abstract: A change-speed gearbox is arranged such that two gear stages (constant mesh gears) are used between an input shaft and a parallel countershaft, and one gear stage is used between the countershaft and a parallel output shaft. A gearbox range with at least three gearbox types with different permissible input torques is obtainable in that two of the three gear stages have a step-up transmission ratio so that the total transmission ratio becomes lower from gearbox type to gearbox type as the input torque increases.