Abstract: A method is provided for moving off of a vehicle with a hybrid drive line, comprising a combustion engine; a gearbox with input shaft connected to the combustion engine and output shaft; a first planetary gear, which is connected to the input shaft, a first main shaft; a second planetary gear connected to the first planetary gear and a second main shaft; a first and second electrical machines respectively connected to the first and second planetary gears; a gear pair connected with the first main shaft; and a gear pair connected with the second main shaft. The method comprises: a) ensuring that the rotatable components of the first and second planetary gears are respectively disconnected from each other, b) ensuring that the corresponding gear pairs are engaged, and c) activating the first and second electrical machines so that a torque is generated in the output shaft.

Abstract: A method is provided to control a hybrid powertrain, comprising a combustion engine; a gearbox with an input shaft connected to the combustion engine and an output shaft; a first planetary gear connected to the input shaft a second planetary gear connected to the first planetary gear; first and second electrical machines respectively connected to the first and second planetary gears; first gear pair connected with the first planetary gear and the output shaft; and second gear pair connected with the second planetary gear and the output shaft. The method comprises: a) engaging gears corresponding to the first gear pair and to the second gear pair; and b) connecting a second sun wheel, arranged in the second planetary gear and a second planetary wheel carrier with each other, with the use of a second coupling device.

Abstract: A method is provided to start a hybrid powertrain to optimize fuel consumption, wherein such hybrid powertrain comprises a combustion engine; a gearbox with input shaft and output shaft; a first planetary gear, connected to the input shaft and a first main shaft; a second planetary gear, connected to the first planetary gear and a second main shaft; first and second electrical machines respectively, connected to the first and second planetary gears; one gear pair connected with the first main shaft; and one gear pair connected with the second main shaft. The method comprising: ensuring that the moveable parts of each of the first and second planetary gears are respectively disconnected from each other; bringing the combustion engine to a predetermined engine speed (nice); and controlling the first and the second electrical machine in such a way that a desired torque (TDrv) is achieved in the output shaft.

Abstract: A method is provided to control a hybrid powertrain to achieve gear shifts without torque interruption, comprising a gearbox with input shaft and output shafts; a first planetary gear connected to the input shaft and a first main shaft; a second planetary gear connected to the first planetary gear and a second main shaft; first and second electrical machines respectively connected to the first and second planetary gears; a first gear pair and a third gear pair between the first main shaft and a countershaft; and a second gear pair between the second main shaft and the countershaft, which is connected with the output shaft via a fifth gear pair.

Abstract: A method is provided to control a hybrid powertrain that comprises: a combustion engine; a gearbox with input and output shafts; a first planetary gear connected to the input shaft and a first main shaft; a second planetary gear, connected to the first planetary gear and a second main shaft; first and second electrical machines, respectively connected to the first and second planetary gears; one gear pair connected with the first planetary gear and output shaft; and one gear pair connected with the second planetary gear and output shaft. The method comprises: disconnecting a first planetary wheel carrier and a first sun wheel or disconnecting a second planetary wheel carrier and a second sun wheel from each other; b) controlling the combustion engine to a predetermined engine speed; and c) controlling the first and second electrical machines so that a desired torque is achieved in the output shaft, while a requested total power consumption of the first and the second electrical machines is achieved.

Abstract: A method is provided to start a combustion engine in a hybrid powertrain, comprising a gearbox with input and output shafts; a first planetary gear, connected to the input shaft and a first main shaft; a second planetary gear connected to the first planetary gear and a second main shaft; first and second electrical machines respectively connected to the first and second planetary gears; one gear pair connected with the first main shaft, and therefore with the first planetary gear and the output shaft; and one gear pair connected with the second main shaft. The method comprises: a) connecting an output shaft of the combustion engine with the input shaft of the gearbox, via a coupling device arranged between the output shaft and the input shaft; and b) controlling the first and second electrical machines to start the combustion engine.

Abstract: A method is provided for moving off of a vehicle with a hybrid powertrain, comprising a combustion engine; a gearbox with input and output shafts; a first planetary gear connected to the input shaft and a first main shaft; a second planetary gear connected to the first planetary gear and a second main shaft; first and second electrical machines respectively connected to the first and second planetary gears and capable of operating each other; one gear pair connected with the first planetary gear and output shaft; and one gear pair connected with the second planetary gear and output shaft.

Abstract: A method is provided to control a hybrid powertrain, comprising a combustion engine; a gearbox with input and output shafts, which combustion engine is connected to the input shaft; a first planetary gear connected to the input shaft; a second planetary gear connected to the first planetary gear; first and second electrical machines respectfully connected to the first and second planetary gears; first gear pair connected with the first planetary gear and output shaft; and second gear pair connected with the second planetary gear and output shaft. The method comprises: a) engaging gears in the first and second gear pairs; and b) connecting two rotatable components in the second planetary gear with a second coupling device.

Abstract: A method is provided to control a hybrid powertrain to achieve a desired engine speed in a combustion engine, said powertrain comprising: a gearbox with input and output shafts with the combustion engine connected to the input shaft; a first planetary gear connected to the input shaft and a first main shaft; a second planetary gear connected to the first planetary gear and a second main shaft; first and second electrical machines respectfully connected to the first and second planetary gears; first gear pair connected with the first main shaft; and second gear pair connected with the second main shaft.

Abstract: Method is disclosed to start a combustion engine in a hybrid powertrain, comprising a gearbox with input and output shafts; a first planetary gear connected to the input shaft and a first main shaft; a second planetary gear connected to the first planetary gear and a second main shaft; first and second electrical machines respectively connected to the first and second planetary gears; a gear pair connected with the first main shaft, first planetary gear, and output shaft; and a gear pair connected with the second main shaft, second planetary gear and output shaft. The method comprises: determining a desired torque in the output shaft and a torque in a combustion engine output shaft required to start the combustion engine and controlling the first and second electrical machines such that the desired torque in the output shaft and the torque required in the combustion engine output shaft is achieved.

Abstract: A method is provided for controlling a hybrid powertrain, comprising a combustion engine; a gearbox with input and output shafts; a first planetary gear connected to the input; a second planetary gear connected to the first planetary gear; first and second electrical machines capable of operating each other and respectively connected to the first planetary gear and to the second planetary gear; one gear pair connected with the first planetary gear and the output shaft; and one gear pair connected with the second planetary gear and the output shaft. The method comprising, while the combustion engine is operating: ensuring that gears are engaged in the one gear pair connected with the first planetary gear and the one gear pair connected with the second planetary gear, and activating the first and second electrical machines so that total emitted electrical power is zero and a torque is generated in the output shaft.

Abstract: A gearbox that includes an input shaft (8) and an output shaft (20); a first epicyclic gear (10) that is connected to the input shaft (8); a second epicyclic gear (12) that is connected to the first epicyclic gear (10); a first electrical machine (14) that is connected to the first epicyclic gear (10); a second electrical machine (16) that is connected to the second epicyclic gear (12); a first gear pair (60) that is arranged between the first epicyclic gear (10) and the output shaft (20); and a second gear pair (66) that is arranged between the second epicyclic gear (12) and the output shaft (20). A side shaft (18) is arranged between one of the epicyclic gears (10, 12) and the output shaft (20) (18) and connected to the output shaft (20) through a final gear, (21) (21) which includes a gear element (92), that is arranged at the side shaft (18) in a disengagable manner. Also, disclosed is a method for controlling the gearbox.

Abstract: Method for control of a drive system comprising a combustion engine with output shaft, gearbox with input shaft, electrical machine, and planetary gear comprising a sun wheel, a ring gear and a planetary wheel carrier. The method comprises, if torque from the combustion engine and the electrical machine is sufficient for the operation of the vehicle with the planetary gear in the release position, and if the vehicle's fuel consumption with the planetary gear in the release position is lower than in the locked position, controlling the electrical machine and the combustion engine such that the requested torque is provided, with the planetary gear in the release position. Otherwise, set the planetary gear in the locked position. A second locking means adapted to divide the combustion engine's output shaft in two sections in a release position, kept in a locked position if the planetary gear is in the release position.

Abstract: Disclosed is a method for control of a vehicle with a drive system comprising an output shaft in a combustion engine and a planetary gear with a first and a second electrical machine connected via their rotors to the components in the planetary gear, a supply of electrical power to electrical auxiliary units and/or loads present in the vehicle is carried out, by way of the combustion engine being kept running with its output shaft connected with the second electrical machine's rotor, and the electrical auxiliary units and/or loads being supplied with electrical power via the first electrical machine and/or the second electrical machine.

Abstract: A drive system for a vehicle comprises an electrical machine, arranged between a combustion engine and an input shaft to a gearbox. The rotor of the electrical machine is connected with a component of a planetary gear, and the input shaft of the gearbox is connected with another component of such planetary gear. A first locking means may be moved between a locked position, in which the planetary gear's three components rotate at the same rotational speed, and a release position, in which the components are allowed to rotate at different rotational speeds. A second locking means is moveable between a locked position in which the output shaft of the combustion engine is locked together with a component in the planetary gear, and a release position, in which the combustion engine's output shaft is decoupled from such a component.

Abstract: In a method for controlling a vehicle with a drive system comprising a power unit configuration adapted to provide output for the vehicle's operation, and further comprising a planetary gear and a first and second electrical machine, connected to components in the planetary gear via their rotors, a locking means is moved from a locked position, in which two of the planetary gear's components are locked together, so that the three components of the planetary gear rotate with the same speed, to a release position, when the vehicle is driven with the locking means in a locked position, by carrying out the following method steps. The power unit configuration is controlled in order to achieve torque balance between the components that are locked together by the locking means, and such locking means are moved into a release position, when said torque balance prevails.

Abstract: A drive system for a vehicle comprises two electrical machines arranged between a combustion engine and an input shaft to a gearbox. The first machine rotor is connected with a planetary gear component, and the input shaft of the gearbox with another planetary gear component. The second machine rotor is connected with the output shaft of the combustion engine, which is also connected with another planetary gear component. A first locking means movable between a locked position, wherein the planetary gear's three components rotate at the same rotational speed, and a release position, wherein the components rotate at different rotational speeds. A second locking means movable between a locked position, and a release position wherein the combustion engine's output shaft is locked to a stationary element in the locked position and disconnected in the release position to rotate with the second machine rotor and a planetary gear component.

Abstract: Disclosed is a method for control a vehicle with a drive system comprising an output shaft of a combustion engine and a planetary gear with a first and a second electrical machine, connected via their rotors to the components of the planetary gear, the vehicle is started by controlling the first electrical machine to achieve a torque thereof, so that the requested torque is transmitted to the planetary gear's output shaft, and controlling the second electrical machine to achieve a torque, so that the desired power to electrical auxiliary aggregates and/or loads in the vehicle, and/or electric energy storage means, if present in the vehicle, for exchange of electric energy with the first and second electrical machine is achieved.

Abstract: Disclosed is a method for control of a vehicle with a drive system comprising a planetary gear and a first and second electrical machine, connected with their rotors to the components of the planetary gear, a braking of the vehicle towards stop occurs by way of a distribution of the desired braking torque between the first and the second electrical machines, and wherein such electrical machines are controlled to transmit a total torque to an output shaft of the planetary gear, which corresponds to the desired braking torque at least to one predetermined low speed limit, before the vehicle stops.

Abstract: In a method for controlling a vehicle with a drive system comprising an output shaft in a combustion engine, a planetary gear and a first and second electrical machine connected to the planetary gear, the turning off of the combustion engine is achieved when the vehicle is driven with the combustion engine running, and a transition to operation of the vehicle with the electrical machines is achieved by ensuring that the second electrical machine's rotor is connected with the combustion engine's output shaft, that injection of fuel into the combustion engine is interrupted and that the second electrical machines rotational speed is controlled towards and until a standstill, whereupon the combustion engine's output shaft is disconnected from the second electrical machine and the planetary gear.