Abstract: A device for a drive-train of a hybrid vehicle comprising a planetary gearset having three elements which comprise a carrier, a sun gear and a ring gear. A first elements serves as a fixed connection of a first input shaft of a first partial transmission of a transmission. A second of the elements serves as a fixed connection of a hybrid drive electric machine. A first shifting element connects, in a first position thereof, a third of the elements to a second input shaft of a second partial transmission, to which a hybrid drive combustion engine can be coupled. The first shifting element, when in a second position, connects the third of the elements to the housing or the stator. A second shifting element, when engaged, couples the two input shafts of the two partial transmissions with one another and, when disengaged, separates the two input shafts from one another.

Abstract: A device for a drive-train of a hybrid vehicle having a planetary gear system that comprises three elements, namely, a ring gear, sun gear and carrier. A first element of these elements of the planetary gear system has a fixed connection with a transmission input shaft of a transmission. A second element of the elements of the planetary gear system has a fixed connection with an electric machine of a hybrid drive. A clutch which can couple two of the three elements of the planetary gear system with one another. Additionally, a shifting element is provided by which a third element, of these three elements of the planetary gear system, can be coupled, in a first shift position, to an internal combustion engine of the hybrid drive and, in a second shift position, to one of a housing or a stator.

Abstract: A method of actuating a shifting element with three shift positions, having a simply controlled shifting cylinder as the actuating element, a shifting element for shifting to the three shift positions and a pressure regulator, such that the shifting cylinder is designed as a cylinder with one working line and the shifting element is pushed by the spring force of at least one spring element to an end position and moved to the other shift positions in opposition to the spring force. The central position is recognized in that, when the correct shifting element position is reached, the force for moving the shifting element in opposition to the spring force abruptly increases and, because of this, a specific pressure can be set by a pressure regulator for the central position.

Abstract: The invention relates to a method and a device for controlling a creep mode of a vehicle having a hybrid drive system (1, 1?), having a parallel hybrid drivetrain (2, 2?) comprising an internal combustion engine (3), at least one electrical machine (5), a first switching element (4) designed as a frictional element and disposed between the internal combustion engine (3) and the electrical machine (5), by means of which the internal combustion engine (3) can be connected to the electrical machine (5), a gearbox (7), an output (26), and at least one second switching element (6) designed as a frictional element and disposed between the electrical machine (5) and the output (26), by means of which the electrical machine (5) can be operationally connected to the output (26).

Abstract: A hybrid drive train of a motor vehicle which comprises a combustion engine, an electric machine which is operable as a motor and a generator and comprises a stator and a rotor, and a multi-stage planetary transmission with input and output shafts. The driveshaft of the combustion engine can be connected to the input shaft of the transmission, the electric machine is coaxially arranged about the input shaft, and the rotor of the electric machine is rigidly connected with the input shaft. To achieve a starting acceleration and climbing capacity on starting, corresponding to those provided by a drive train with an automatic transmission and a hydrodynamic torque converter or a manual gearshift transmission with a converter shifting clutch, the rotor of the electric machine can be connected with the transmission input shaft via an input transmission stage which is formed as a simple planetary gearset and has a high gear ratio.

Abstract: A method of operating a drive train having a hybrid drive that comprises an internal combustion engine and an electric machine, a clutch connected between the combustion engine and electric machine, a transmission connected between the electric machine and an output drive, and a start-up element connected between the electric machine and the output drive. The method for starting-up the drive train, when the clutch connected between the combustion engine and the electric machine and the start-up element are both disengaged, and the electric machine is stopped and short-circuited. The method comprising the steps of accelerating the internal combustion engine to a rotational speed which depends on a short circuit torque of the electric machine that must be overcome; engaging the clutch connected between the combustion engine and electric machine; and bringing the combustion engine to a start-up speed depending on the driver's request; and engaging the start-up element.

Abstract: A transmission device with at least two multi-gear transmission groups. Torque is introduced via a input shaft into the transmission groups and into the other transmission group via a main shaft. The input shaft is directly connected with the main shaft via a shifting element during a gearshift to achieve an intermediate gear. When the intermediate gear is engaged, torque passes to the shafts connected to each other via the shifting element. A method for operating transmission, during the gearshift, includes introducing torque from the electric machine to the shafts connected via the shifting element and adjusting the rotational speed of the input shaft to the rotational speed of the target gear. A further shifting element is engaged in the first transmission group, the shifting element is disengaged, and torque of the electric machine is reduced, once the rotational speeds of the input shaft and the target gear match one another.

Abstract: A multi-speed planetary coupling transmission (3) which includes a plurality of planetary gear sets (4, 5, 6) and a plurality of shifting elements (A, B, D, E). Depending on actuation of the shifting elements (A, B, D, E), various gear ratios can be achieved by the transmission. At least one provided electric machine (EM1) is functionally connected with one of the planetary gear sets (6). From the electric machine (EM1), a torque can be introduced, via a shaft (6B) of the planetary gear set (6) associated with the electric machine (EM1), in order to support torque acting on the associated planetary gear set (6) and achieve a gear ratio in the transmission (3) via the electric machine (EM1).

Abstract: An automated multi-group standard transmission, for a utility vehicle, and a process for changing gears in the multi-group transmission. The multi-group transmission includes at least two multi-speed transmission groups arranged one after the other, such that a multitude of gears can be shifted. A transmission input shaft that can be connected to an engine, via a startup element, is associated with a first transmission group and a second transmission main shaft is associated with a second transmission group. Load shifting mechanisms produce a temporary direct connection between the transmission input shaft and the transmission main shaft such that an intermediate gear can be shifted during a gear change from an original gear into a target gear. The load shifting mechanism enables gear changes that are virtually free of interruptions in load transfer during a gear change from a lower to a higher gear, thus increasing a high operational comfort.

Abstract: A hybrid drive train of a motor vehicle which comprises a combustion engine, an electric machine which is operable as a motor and a generator and comprises a stator and a rotor, and a multi-stage planetary transmission with input and output shafts. The driveshaft of the combustion engine can be connected to the input shaft of the transmission, the electric machine is coaxially arranged about the input shaft, and the rotor of the electric machine is rigidly connected with the input shaft. To achieve a starting acceleration and climbing capacity on starting, corresponding to those provided by a drive train with an automatic transmission and a hydrodynamic torque converter or a manual gearshift transmission with a converter shifting clutch, the rotor of the electric machine can be connected with the transmission input shaft via an input transmission stage which is formed as a simple planetary gearset and has a high gear ratio.

Abstract: A hybrid module for the hybrid drive train of a motor vehicle is proposed, comprising an electric motor, a planetary gear assembly and a clutch (6) which connects the drive shaft of the internal combustion engine to the planet carrier (5) of the planetary gear assembly in a releasable manner, wherein the mounting for the rotor (1) and stator (2) is provided by the electric motor by way of the cover (3) of the electric motor, whereby the hub of the rotor (1) serves as the ring gear of the planetary gear assembly of the hybrid module and features a ring gear gearing and whereby the subassembly, comprised of the cover (3), the rotor (1) and the stator (2) can be preassembled.

Abstract: The invention relates to a method and a device for operating a hybrid drive (1) of a vehicle, comprising a drive train (2) that has a combustion engine (3), at least one electric machine (5), and a powershift transmission (7). The combustion engine (3) can be started from purely electromotive force during powershifting. In order to ensure a reliable starting process and a high degree of comfort during operation, a slip period during which at least one powershifting element of the powershift transmission (7) is in a state of slip during powershifting is adjusted at least during a signaled start of the combustion engine (3) by taking into account a progress over time of the start of the combustion engine (3). In a device for carrying out said method, means are provided for detecting and time-variably adjusting a slip of at least one powershifting element of the powershift transmission (7).

Abstract: A hybrid drive train of a motor vehicle which comprises a combustion engine with a drive shaft and an electric machine which operates as either a motor or generator. The electric machine has a stator and a rotor and surrounds a planetary automatic transmission. The combustion engine drive shaft communicates, via a controllable separating clutch, and the rotor of the electric machine communicates, via the input transmission section, with the automatic transmission input shaft. The electric machine, the separating clutch, and the input transmission section are coaxially combined within a module enclosure of a preassembled hybrid module that has input and output elements. The input element is connected with the drive shaft of the combustion engine and the output element is connected with the input shaft of the automatic transmission, and the hybrid module maintains the dimensions of a conventional hydrodynamic torque converter.

Abstract: A hydraulic system of a transmission comprises a main transmission pump that can be driven by torque transmitted via the transmission unit and with an auxiliary pump that can be driven by an electric machine, by which primary and secondary pressure circuits can be supplied with hydraulic fluid. Pressure sides of the main transmission pump and the auxiliary pump are connected to the primary pressure circuit upstream of a pressure relief valve provided for adjusting a main pressure in the primary pressure circuit. The pressure relief valve is arranged between the pressure sides of the main transmission pump and the auxiliary pump and the secondary pressure circuit. The pressure side of the auxiliary pump can be actively connected with the secondary pressure circuit, via a hydraulic line which can be blocked in the direction toward the primary and secondary pressure circuits, and which bypasses the pressure-relief valve.

Abstract: A transmission device (1) having a transmission housing (2) in which several assemblies can be positioned for creating different gear ratios, and a start-up device, preferably a hydrodynamic torque converter. At least one breakout (3, 13) is provided in the wall area of the transmission housing (2), where the edge areas (4) are designed as stiffening zones and through which the torque is brought from the transmission housing (2) to auxiliary drive trains. In the area (5) of the transmission housing (2), which is designated for a start-up device, at least one electric machine (6) of a hybrid system is provided. A connection of the electric machine (6), which is positioned in the transmission housing (2), to power electronic located external of the transmission housing (2), is brought through the at least one breakout (13) of the transmission housing (2).

Abstract: A method of operating a drive train having a hybrid drive that comprises an internal combustion engine and an electric machine, a clutch connected between the combustion engine and electric machine, a transmission connected between the electric machine and an output drive, and a start-up element connected between the electric machine and the output drive. The method for starting-up the drive train, when the clutch connected between the combustion engine and the electric machine and the start-up element are both disengaged, and the electric machine is stopped and short-circuited. The method comprising the steps of accelerating the internal combustion engine to a rotational speed which depends on a short circuit torque of the electric machine that must be overcome; engaging the clutch connected between the combustion engine and electric machine; and bringing the combustion engine to a start-up speed depending on the driver's request; and engaging the start-up element.

Abstract: A method for determining the starting torque in a hybrid vehicle, comprising an internal combustion engine and an electric machine, wherein the internal combustion engine can be decoupled from the drive train by opening a clutch, said method providing for the determination of the starting torque by detecting the holding torque in a holding process of the vehicle with the internal combustion engine decoupled before the operating brake is engaged, wherein the holding torque detected corresponds to the minimum required starting torque.

Abstract: The invention relates to a method and a device for controlling a creep mode of a vehicle having a hybrid drive system (1, 1?), having a parallel hybrid drivetrain (2, 2?) comprising an internal combustion engine (3), at least one electrical machine (5), a first switching element (4) designed as a frictional element and disposed between the internal combustion engine (3) and the electrical machine (5), by means of which the internal combustion engine (3) can be connected to the electrical machine (5), a gearbox (7), an output (26), and at least one second switching element (6) designed as a frictional element and disposed between the electrical machine (5) and the output (26), by means of which the electrical machine (5) can be operationally connected to the output (26).

Abstract: A transmission device with at least two multi-gear transmission groups. Torque is introduced via a input shaft into the transmission groups and into the other transmission group via a main shaft. The input shaft is directly connected with the main shaft via a shifting element during a gearshift to achieve an intermediate gear. When the intermediate gear is engaged, torque passes to the shafts connected to each other via the shifting element. A method for operating transmission, during the gearshift, includes introducing torque from the electric machine to the shafts connected via the shifting element and adjusting the rotational speed of the input shaft to the rotational speed of the target gear. A further shifting element is engaged in the first transmission group, the shifting element is disengaged, and torque of the electric machine is reduced, once the rotational speeds of the input shaft and the target gear match one another.

Abstract: A multi-speed planetary coupling transmission (3) which includes a plurality of planetary gear sets (4, 5, 6) and a plurality of shifting elements (A, B, D, E). Depending on actuation of the shifting elements (A, B, D, E), various gear ratios can be achieved by the transmission. At least one provided electric machine (EM1) is functionally connected with one of the planetary gear sets (6). From the electric machine (EM1), a torque can be introduced, via a shaft (6B) of the planetary gear set (6) associated with the electric machine (EM1), in order to support torque acting on the associated planetary gear set (6) and achieve a gear ratio in the transmission (3) via the electric machine (EM1).