Abstract: A method for controlling of a drive train of a vehicle having a multi-group transmission, an output mechanism and a control apparatus for the regulation of the drive train. The multi-group transmission consists of an automatic transmission and a range group. To change the ratio of the range group the drive train is relieved of load; a shifting element of the range group is closed; a shifting element of the range group is synchronized and opened; and a ratio of the automatic transmission is so altered that a change of the ratio of the multi-group transmission is less than in a case of an individual alteration of the ratio of the range group.

Abstract: Disclosed is a method for controlling a drive train (1) of a motor vehicle, especially an off-road vehicle, comprising a drive engine (2), a multi-group transmission (4), an output and a control device. The multi-group transmission (4) consists of at least one automatic gearbox (8) and a downstream range-change unit (9). When a modification occurs in the multiplication of the range-change unit (9), a) the drive train is relieved by modifying the torque of the drive engine (2), a shift element (24, 25) to be switched off in said range-change unit (9) is disconnected, c) a shift element (24,25) to be switched on in said range-change unit is synchronized and switched on and d) a multiplication of the automatic gearbox (8) is modified in such a way that the modification of the multiplication of the multi-group transmission (4) is smaller than a single modification of the multiplication of the range-change unit (9).

Abstract: A method for controlling a drivetrain (1) in a motor vehicle is disclosed, in particular in an off-road vehicle with a drive unit (2), a multi-group transmission (4) and an output. The multi-group transmission (4) comprises at least an automatic gearbox (8) and a subsequent range transfer box (9) which may be switched by means of switching elements (24, 25). On changing the ratio in the range transfer box (9), a synchronisation of the switching element (24 or 25), for switching in the range transfer box (9), is carried out by means of a controller of switching elements in the automatic gearbox (8).

Abstract: A distributor transmission (8) having at least three shafts (11, 12, 13) for distributing a drive torque (M_GE) as needed to at least two drive axles (4, 5). A first shaft (11) is operatively connected with the first drive axle (5) and can be loaded with the drive torque (M_GE). The second shaft (12) is operatively connected with the second drive axle (4) and a torque (M_E) of a machine device (14) on a third shaft (13) can be applied which influences a degree of distribution (P_VA/P_GES) of the drive torque (M_GE) between the drive axles (4, 5).

Abstract: A method for controlling a drive train of a vehicle having a a multi-group transmission, comprising an automatic transmission and a subsequently placed range group. During a change of the gear ratio of the range group, the following occurrences take place: the drive train is relieved of load by a change of motor torque; an openable shifting element of the range group is opened; an closable shifting element of the range group is synchronized and closed; one ratio of the automatic transmission is changed in such a way that a change of ratio of the multi-group transmission is smaller than is an unassisted change of ratio of the range group. A desired speed of rotation of the motor is established by changing the transfer capability of one shifting element to an equivalent ratio of the multi-group transmission, which ratio exhibits a connective rotary speed to which the closable shifting element of the range group is synchronous.

Abstract: A method for controlling of a drive train of a vehicle having a multi-group transmission, an output mechanism and a control apparatus for the regulation of the drive train. The multi-group transmission consists of an automatic transmission and a range group. To change the ratio of the range group the drive train is relieved of load; a shifting element of the range group is closed; a shifting element of the range group is synchronized and opened; and a ratio of the automatic transmission is so altered that a change of the ratio of the multi-group transmission is less than in a case of an individual alteration of the ratio of the range group.

Abstract: A transfer case (1) with controllable clutch (5) for a motor vehicle, especially for a motor vehicle with part-time four-wheel drive, for distributing a driving torque coming in via a drive shaft (2) to at least two output shafts (3, 4). Hereby the output shaft (4) can be connected to the drive shaft (2) via the clutch (5), and the clutch (5) can be actuated via an electric motor (9) and a drive converter device (10) that is arranged between the electric motor (9) and the clutch (5) for converting a rotatory motion of the electric motor (9) into a translatory actuating motion for the clutch (5). The electric motor (9) is hereby designed as an induction motor.

Abstract: A distributor gear (1) with an adjustable coupling device (5) for a vehicle, in particular for a vehicle with a shiftable all-wheel drive is described for the distribution of an incoming drive torque via a drive shaft (2) to at least two output shafts (3, 4). It is moreover provided that an output shaft (4) can be connected via the coupling device (5) with the drive shaft (2) and that the coupling device (5) can be actuated via an electric motor (9) and a drive converter device (10) located between the electric motor (9) and the coupling device (5) for the conversion of rotary movement of the electric motor (9) into a translatory actuation movement for the coupling device (5). The electric motor (9) is incorporated into a gear (7).

Abstract: In an electromagnetically actuated dual clutch-brake combination (8), a drive input shaft (2) can be optionally engaged in drive connection with a first drive output shaft (4) or with a second drive output shaft (6). The second drive output shaft (6) is associated with an electromagnetic brake (52), which is provided in order to immobilize the second drive output shaft (6), whereas the first drive output shaft (4) can still be connected to the drive input shaft (2) by an electromagnetic clutch (28, 32). The electromagnetic dual clutch-brake combination is suitable for controlling a variable longitudinal differential lock and a shiftable range gear system of an all-wheel distributor gearbox, with only a single electric motor.

Abstract: A method for controlling a drivetrain (1) in a motor vehicle is disclosed, in particular in an off-road vehicle with a drive unit (2), a multi-group transmission (4) and an output. The multi-group transmission (4) comprises at least an automatic gearbox (8) and a subsequent range transfer box (9) which may be switched by means of switching elements (24, 25). On changing the ratio in the range transfer box (9), a synchronisation of the switching element (24 or 25), for switching in the range transfer box (9), is carried out by means of a controller of switching elements in the automatic gearbox (8).

Abstract: A device for guiding torque of one drive shaft (3) connected with a driving appliance (2) onto a first or a second output shaft (4, 5). A torque fed via the drive shaft (3) can be applied, respectively, to one of the two output shafts (4, 5) depending on a control of a changeover device (6). The changeover device (6) comprises one electromagnetic clutch (7) which can produce a power flow between the drive shaft (3) and the first or the second output shaft (4 or 5). The electromagnetic clutch (7) comprises a coupling element (8) which is guided and displaced in an axially and rotatable manner and is fixedly connected with the drive shaft (3) and depending on a current supply of the electromagnetic clutch (7) produces the power flow between the drive shaft (3) and the first or the second output shaft (4 or 5).

Abstract: An auxiliary transmission (31) with controllable clutch (2) is described for the optional distribution of a drive output torque to one or more drive output shafts with a reduction gear stage (3) and with a hydraulic pump (14). The hydraulic pump (14) is arranged on a transmission input shaft (4) and the reduction gear stage (3) is connected in series in such manner that the drive input power to the hydraulic pump (14) remains at least approximately the same when a range change takes place in the reduction gear stage (3).

Abstract: A steering system with at least one steering wheel actuator and at least one steering actuator which are connected to each other via a controlled system. Minimal steering impulses being superimposed in order to be able to determine the steering tie rod forces that occur.

Abstract: A reduction gear (3) of a multi-range transmission (1) for a vehicle, especially for an all-wheel vehicle, having at least two ratio steps. The reduction gear (3) is situated between a main transmission (2) and one output of the vehicle and designed with at least one parking lock device (22A, 22B) by means of which, in activated state, at least one part of the output can be stopped. The parking lock device (22A, 22B) is associated on the transmission output side with at least one output shaft (7, 8) so that the output of the vehicle in activated state of the parking lock device (22A, 22B) can be stopped even when the power flow is interrupted in a drive train in the area of the reduction gear (3).

Abstract: A retarder system for commercial vehicles is provided which consists of a transmission oil circuit (18) for lubrication of the transmission and of a retarder cooling circuit (4) which uses oil as operating fluid, both circuits being coupled via a connection (21) so that in the non-activated braking state of the retarder (1), for increasing the transmission oil flow rate through a radiator (3), oil can be branched off from the transmission oil circuit (18). In addition a retarder pump (12) is proposed which has a prime mover (25), preferably an electrical motor.

Abstract: A distributor transmission (8) having at least three shafts (11, 12, 13) for distributing a drive torque (M_GE) as needed to at least two drive axles (4, 5). A first shaft (11) is operatively connected with the first drive axle (5) and can be loaded with the drive torque (M_GE). The second shaft (12) is operatively connected with the second drive axle (4) and a torque (M_E) of a machine device (14) on a third shaft (13) can be applied which influences a degree of distribution (P_VA/P_GES) of the drive torque (M_GE) between the drive axles (4, 5).

Abstract: An all-wheel distributor transmission (1) is described for a motor vehicle comprising a planetary gear set as multiplication step (2) for a switchable off-road gear and a planetary gear set (3) with variable division for distributing a drive torque onto a front axle and a rear axle. The all-wheel distributor transmission (1) also has an adjustable lock (4) for locking between the front axle and the rear axle, the lock (4) and the multiplication step (2) being actuatable via a controllable drive device (5). The drive device (5) comprises a drive shaft (6) and two output shafts (7, 8), the first output shaft (7) being in operative connection with the multiplication step (2) and the second output shaft (8) being in operative connection with the lock (4). A torque introduced via the drive shaft (6) can be applied on the first or the second output shaft (7 or 8) according to a control of a shift unit (10) for actuating the lock (4) or the multiplication step (2).

Abstract: A transfer case (1) with controllable clutch (5) for a motor vehicle, especially for a motor vehicle with part-time four-wheel drive, for distributing a driving torque coming in via a drive shaft (2) to at least two output shafts (3, 4). Hereby the output shaft (4) can be connected to the drive shaft (2) via the clutch (5), and the clutch (5) can be actuated via an electric motor (9) and a drive converter device (10) that is arranged between the electric motor (9) and the clutch (5) for converting a rotatory motion of the electric motor (9) into a translatory actuating motion for the clutch (5). The electric motor (9) is hereby designed as an induction motor.

Abstract: A distributor gear (1) with an adjustable coupling device (5) for a vehicle, in particular for a vehicle with a shiftable all-wheel drive is described for the distribution of an incoming drive torque via a drive shaft (2) to at least two output shafts (3, 4). It is moreover provided that an output shaft (4) can be connected via the coupling device (5) with the drive shaft (2) and that the coupling device (5) can be actuated via an electric motor (9) and a drive converter device (10) located between the electric motor (9) and the coupling device (5) for the conversion of rotary movement of the electric motor (9) into a translatory actuation movement for the coupling device (5). The electric motor (9) is incorporated into a gear (7).

Abstract: In an electromagnetically actuated dual clutch-brake combination (8), a drive input shaft (2) can be optionally engaged in drive connection with a first drive output shaft (4) or with a second drive output shaft (6). The second drive output shaft (6) is associated with an electromagnetic brake (52), which is provided in order to immobilize the second drive output shaft (6), whereas the first drive output shaft (4) can still be connected to the drive input shaft (2) by an electromagnetic clutch (28, 32). The electromagnetic dual clutch-brake combination is suitable for controlling a variable longitudinal differential lock and a shiftable range gear system of an all-wheel distributor gearbox, with only a single electric motor.