Abstract: A method for starting an internal combustion engine of a hybrid drive of a motor vehicle, the internal combustion engine and at least one electric motor being mechanically linkable to an output shaft of the hybrid drive via a gear system. The output shaft of the hybrid drive is placed in rotary motion, and at least one of the electric motors is switched to a generator mode by the gear system and by a control system.

Abstract: A method of setting a setpoint operating state of a hybrid drive of a vehicle, where the hybrid drive includes as drive motors an internal combustion engine and at least one electric motor, and the output shafts of the drive motors are mechanically linkable to a drive train of the vehicle. Depending on the instantaneous power demand on the drive motors of the hybrid drive and the instantaneous power capacity of the drive motors of the hybrid drive, an optimal crankshaft speed of the combustion engine may be determined, and this crankshaft speed may be set by coordinated actuation of the drive motors of the hybrid drive, while maintaining the instantaneous power demands.

Abstract: A motor vehicle having a hybrid drive and a method for idle-speed control of a hybrid drive of a motor vehicle are provided. The hybrid drive includes an internal combustion engine having an engine management system, and at least one speed-controlled electric machine which is coupled to a drive shaft of the internal combustion engine during idling. During idling, the internal combustion engine is controlled by the engine management system in open or closed loop as a function of power demands of an electrical system of the motor vehicle.

Abstract: The present invention relates to a transfer case for distribution of a driving force on a first axle (9) and a second axle (8) of a motor vehicle. The transfer case (1) is arranged between the first axle (9) and the second axle (8). The transfer case (1) includes a planetary gear (3) with a central gear (4) (for example, a sun gear), a central gear (5) (for example, an internal gear), and a planetary pinion support (6) with multiple planetary pinions (7), as well as an electrical machine (2). The electrical machine (2) is connected with an element (4, 5, 6) of the planetary gear (3). The distribution of the driving force on the two axles (8, 9) takes place according to the present invention by means of controlling the electrical machine (2), in order to produce a predetermined moment of rotation on of the elements of the planetary gear (3), whereby the moment of rotation of the two other elements of the planetary gear, which is connected respectively with one of the axles, are fixed.

Abstract: A method for starting a hybrid drive having a battery, an internal combustion engine, and at least two electric machines, at least one being used to start the internal combustion engine. Reliable starting even at very low temperatures by bringing at least one of the electric machines to a specified or specifiable rotational speed in a state that is uncoupled from the internal combustion engine at the beginning of a starting phase, while electric power is supplied from the battery, and the electric machine is subsequently switched to generator operation; the electric power generated in generator operation is supplied to at least one further one of the electric machines which then starts the internal combustion engine.

Abstract: A method for adjusting a setpoint operating state of a hybrid drive in a motor vehicle, the hybrid drive including an internal combustion engine and at least two electric motors as the drive motors, and the output shafts of the drive motors being operatively connectible to a drive train of the vehicle. A setpoint operating point of the hybrid drive is adjusted based on speeds and torques of the drive motors, the setpoint speeds and torques determined based on an instantaneous power demand on the hybrid drive and an instantaneous electrical power demand of an electrical system of the vehicle, and at least one of the electric motors is controlled by voltage regulation and the other electric motors controlled by speed regulation.

Abstract: Two methods for operating a motor vehicle driven by an internal combustion engine (VM) and by two electrical machines (E1, E2) are proposed. The motor vehicle has a transmission (G) with two power paths (LP1, LP2) controllable independently of one another. Each power path (LP1, LP2) is coupled via a respective epicyclic gear (P1, P2) to one of the electrical machines (LP1, LP2) and to the input shaft (KW) of the transmission (G) and can be coupled via shiftable gears (1, 2, 3, 4, 5, 6, R) to the output shaft (AW) of the transmission (G). The object is to make it possible to operate the motor vehicle more efficiently. To reduce circulating mechanical power flow between the two power paths (LP1, LP2), particularly in the boost mode or upon recuperation of braking energy, the gear combination (1, 2, 3, 4, 5, 6, R) is varied, or the engine rpm is lowered, or only one electrical machine (E1, E2) is used as a generator.

Abstract: A transmission (15; 15a; 15b; 15c). In particular for motor vehicles, has two planetary gear sets (16; 16c; 17; 17c;), the ring gears (18; 18c; 19) of which are coupled with the crankshaft (11; 11a; 11c) of an internal combustion engine by means of a toothed ring (12). Each of the planetary gear sets (16; 16c, 17) is coupled with an electrical machine (26, 27) and a transmission shaft (31, 32) on which input gears (1E through 5E, RE) for various conversion ratios are arranged. The input gear wheels (1E through 5E, RE) mesh with output gear wheels (1A through 5A, RA) arranged on an output shaft (40; 40a; 40c). According to the invention, it is provided that the electrical machines and/or the planetary gear sets (16; 16c, 17; 17c) are bridged in order to enhance the overall efficiency level during constant driving conditions. A pair of gear wheels can be used for this purposed, for example, that couples the input shaft (11) with a transmission shaft (31, 32).

Abstract: A method for starting an internal combustion engine of a hybrid drive of a motor vehicle, the internal combustion engine and at least one electric motor being mechanically linkable to an output shaft of the hybrid drive via a gear system.

Abstract: A method of setting a setpoint operating state of a hybrid drive of a vehicle is described, where the hybrid drive includes as drive motors an internal combustion engine and at least one electric motor, and the output shafts of the drive motors are mechanically linkable to a drive train of the vehicle.

Abstract: The present invention relates to a transfer case for distribution of a driving force on a first axle (9) and a second axle (8) of a motor vehicle. The transfer case (1) is arranged between the first axle (9) and the second axle (8). The transfer case (1) includes a planetary gear (3) with a central gear (4) (for example, a sun gear), a central gear (5) (for example, an internal gear), and a planetary pinion support (6) with multiple planetary pinions (7), as well as an electrical machine (2). The electrical machine (2) is connected with an element (4, 5, 6) of the planetary gear (3). The distribution of the driving force on the two axles (8, 9) takes place according to the present invention by means of controlling the electrical machine (2), in order to produce a predetermined moment of rotation on of the elements of the planetary gear (3), whereby the moment of rotation of the two other elements of the planetary gear, which is connected respectively with one of the axles, are fixed.

Abstract: A method is described for starting a hybrid drive having a battery (1), an internal combustion engine (9), and at least two electric machines (5, 8), at least one being used to start the internal combustion engine (9). Reliable starting even at very low temperatures is achieved by bringing at least one of the electric machines (5) to a specified or specifiable rotational speed in a state that is uncoupled from the internal combustion engine (9) at the beginning of a starting phase, while electric power is supplied from the battery (1), and the electric machine is subsequently switched to generator operation; the electric power generated in generator operation is supplied to at least one further one of the electric machines (8) which then starts the internal combustion engine (9).

Abstract: Two methods for operating a motor vehicle driven by an internal combustion engine (VM) and by two electrical machines (E1, E2) are proposed. The motor vehicle has a transmission (G) with two power paths (LP1, LP2) controllable independently of one another. Each power path (LP1, LP2) is coupled via a respective epicyclic gear (P1, P2) to one of the electrical machines (LP1, LP2) and to the input shaft (KW) of the transmission (G) and can be coupled via shiftable gears (1, 2, 3, 4, 5, 6, R) to the output shaft (AW) of the transmission (G). The object is to make it possible to operate the motor vehicle more efficiently. This is achieved in that to reduce circulating mechanical power flow between the two power paths (LP1, LP2), particularly in the boost mode or upon recuperation of braking energy, the gear combination (1, 2, 3, 4, 5, 6, R) is varied, or the engine rpm is lowered, or only one electrical machine (E1, E2) is used as a generator.

Abstract: A transmission (15; 15a; 15b; 15c), in particular for motor vehicles, has two planetary gear sets (16; 16c; 17; 17c), the ring gears (18; 18c; 19) of which are coupled with the crankshaft (11; 11a; 11c) of an internal combustion engine by means of a toothed ring (12). Each of the planetary gear sets (16; 16c, 17) is coupled with an electrical machine (26, 27) and a transmission shaft (31, 32) on which input gear wheels (1E through 5E, RE) for various conversion ratios are arranged. The input gear wheels (1E through 5E, RE) mesh with output gear wheels (1A through 5A, RA) arranged on an output shaft (40; 40a; 40c). According to the invention, it is provided that the electrical machines and/or the planetary gear sets (16; 16c, 17; 17c) are bridged in order to enhance the overall efficiency level during constant driving conditions. A pair of gear wheels can be used for this purpose, for example, that couples the input shaft (11) with a transmission shaft (31, 32).

Abstract: An apparatus is proposed for coupling at least one secondary assembly (32), in particular a starter generator, to a primary assembly (20), in particular an internal combustion engine. The at least one secondary assembly (32) and the apparatus for coupling (26) are connected to each other by means of a transmission mechanism (27). The apparatus has an epicyclic gear (38) which connects the primary assembly (20) to the transmission mechanism (27) and the epicyclic gear (38) can be switched between two multiplications by means of a first coupling (53). The first coupling (53) is a free-wheel coupling and a ring gear (50) of the epicyclic gear (38) can be immobilized in at least one rotation direction by means of a second coupling (56).

Abstract: The synchronous or asynchronous electrical machine for an internal combustion engine can operate alternately in a starter mode during engine starting and a generator mode during engine operation in order to eliminate the need for a separate starter and generator. The electrical machine includes a two-stage planetary gear device coupled to a shaft of the internal combustion engine. The two-stage planetary gear device includes two stages with ring gears and respective braking devices assigned to the two stages that prevent the ring gears of those stages from rotating when engaged therewith. The two-stage planetary gear device operates with different gear ratios in the starter mode and the generator mode. The gear ratio in the starter mode is between 4 and 60 and between 1.6 and 4 in the generator mode. The ratio of the gear ratios in the starter mode and the generator mode must be at least two.

Abstract: In a friction belt brake with a rotary cylinder (1), which is wound around at least a part of its circumference by a friction belt (2), and with a support (3) for the friction belt, which in a first braking position, can be pivoted around a first axis (9; 25) and two securing points (10, 11) for respectively opposite end sections of the friction belt, wherein a first of the two securing points has a longer lever arm (a) in relation to the first axis than the second securing point (11), the provision is made that in a second braking position, the support (3) can be pivoted around a second axis with regard to which the second securing point has a longer lever arm than the first.