Scania Cv Ab

Scania Cv Aktiebolag

Niklas Pettersson

Mathias Björkman

Mikael Bergquist

Johan Lindström

Anders Kjell

Karl Redbrandt

Fredrik Sundén

Johan Falkhäll

Mikael Bergqvist

Fredrik SUNDÉN

Nils-Gunnar VÅGSTEDT

Mathias BJÖRKMAN

Johan LINDSTRÖM

Mathias BJÖRKMNAN

The invention relates to a method, performed by a control device, for driving at least one power consumer connected to a powertrain of a vehicle. The at least one propulsion unit comprises a first electrical machine and a second electrical machine, wherein the first electrical machine is connected to a first main shaft and the second electrical machine is connected to a second main shaft. A connection shaft is connected to the first electrical machine; and the at least one power consumer comprises a first power consumer connected to the first main shaft and/or a second power consumer connected to the connection shaft. The method comprising: controlling the powertrain to provide uninterrupted propelling torque on the first main shaft and/or on the connection shaft during a stand still condition of the output shaft of the gearbox and/or during a transition from a stand still condition to a rotational condition of the output shaft of the gearbox, and/or during gear shifting from one gear to another gear in the gearbox. The invention also relates to a vehicle comprising a powertrain, a computer program and a computer-readable medium.

Method for driving at least one power consumer connected to a powertrain

A hybrid powertrain that includes a combustion engine () and a gearbox () with an input shaft () and an output shaft (); a first planetary gear () connected to the input shaft (); a second planetary gear () connected to the first planetary gear (); a first electrical machine () connected to the first planetary gear (); a second electrical machine () connected to the second planetary gear (); at least one gear pair (G) connected to the first planetary gear () and to the output shaft (); and at least one gear pair (G) connected to the second planetary gear () and to the output shaft (), a countershaft () provided between the combustion engine () and the gearbox () so that the engine () can be disconnected from the gearbox (). Also disclosed is a method for controlling the disclosed hybrid powertrain (). Also a vehicle () includes such a gearbox (), and a method to control such a gearbox (). Also a computer program (P) to control a gearbox.

Hybrid powertrain with a gearbox and method to control the hybrid powertrain

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. The method comprises a) ensuring that two rotatable components in the first planetary gear are connected; b) ensuring that all rotatable components in the second planetary gear are disconnected; c) ensuring that a gear is engaged in the first gear pair, d) ensuring that the second gear pair is disconnected; e) controlling the second electrical machine so that a desired torque is achieved in the output shaft; f) controlling the combustion engine to a desired engine speed; and g) controlling the first electrical machine so that a desired total power consumption for the first and the second electrical machines is achieved.

Method for controlling a hybrid driveline

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. The method comprising, while the combustion engine is in operation: a) ensuring that the rotatable components of the first and second planetary gears are respectively disconnected from each other, b) ensuring that at least one gear is engaged, corresponding to the one gear pair connected with the first planetary gear, and/or the one gear pair connected with the second planetary gear, and c) activating the first and second electrical machines, where total power output from the electrical machines is zero, and so that a torque is generated in the output shaft.

Method for takeoff of a vehicle comprising a hybrid driveline

The present invention relates to a method for switching power supply path of at least one electrical machine, said electrical machine being arranged to be selectively supplied power by a first power supply path and a second power supply path, respectively, by alternately opening and closing said power supply paths, said first and second power supply paths being arranged to connect a power supply source to a first connection terminal means of said electrical machine. The method includes, when switching from said first power supply path to said second power supply path: opening said first power supply path; by means of said electrical machine, controlling a terminal voltage of said first connection terminal means to substantially a power supply voltage of said second power supply path; and closing said second power supply path.

Method and system for switching from a first power supply path to a second power supply path

Provided is a method to control a hybrid powertrain to achieve a reverse drive, wherein the hybrid powertrain comprises an internal combustion engine; a gearbox with an input 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 the output shaft; and one gear pair connected with the second main shaft and the output shaft, wherein the internal combustion engine is connected with the first planetary gear via the input shaft. The method comprises: ensuring that moveable component parts in the first planetary gear are disconnected from each other and/or that moveable component parts in the second planetary gear are disconnected from each other; ensuring that an output shaft in the internal combustion engine is prevented from rotating; and controlling the first electrical machine and/or second electrical machine to achieve a negative torque in the output shaft via the first main shaft and/or second main shaft.

Method to control a hybrid powertrain, vehicle comprising such a hybrid powertrain, computer program for controlling such a hybrid powertrain, and a computer program product comprising program code

A gearbox having an input shaft () and an output shaft (); a first epicyclic gear () connected to the input shaft (); a second epicyclic gear () connected to the first epicyclic gear (); a first electrical machine () connected to the first epicyclic gear (); a second electrical machine () connected to the second epicyclic gear (); a first main shaft () connected to the first epicyclic gear (); a second main shaft () connected to the second epicyclic gear (). A first coupling unit () disengagingly connects two rotatable components () at the first epicyclic gear (), and a second coupling unit () disengagingly connects two rotatable components () at the second epicyclic gear (), such that at least one of the rate of revolution and the torque at the first and the second main shafts () can be influenced by controlling at least one of the first and the second coupling units () to a condition of the rotatable components () that is engaged or disengaged. Also a vehicle () having such a gearbox (), a method to control such a gearbox (), a computer program (P) to control a gearbox, and a computer program product comprising program code for an electronic control unit () or another computer () in order to implement the method.

Gearbox for a hybrid powertrain and method to control such a gearbox

Method 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; 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 connected with the first main shaft, first planetary gear, and output shaft of the gear box; and a second gear pair connected with the second main shaft, second planetary gear and output shaft of the gear box. The method comprises: determining a desired torque in the output shaft of the gear box and a start torque in an output shaft of the combustion engine required to start the combustion engine, and controlling the first and second electrical machines to achieve both the desired and start torques.

Method for starting a combustion engine in a hybrid driveline

A method for accelerating a vehicle driving forward, in which the vehicle has a propulsion system including a combustion engine with an output shaft (), a gearbox () with an input shaft (), an electric machine () comprising a stator and a rotor, and a planetary gear comprising a sun gear (), a ring gear () and a planet wheel carrier (). When accelerating the vehicle the torque of the electric machine is controlled and the rotational speed of the combustion engine is controlled until the components of the planetary gear have the same rotational speed and may be interlocked.

Method for accelerating a hybrid vehicle

A method for obtaining gear shifting of a vehicle, where the vehicle has a planetary gearing in the drive train, a combustion engine with an output shaft connected to a rotor of a second electric machine and to a first component of the planetary gearing, a first electric machine with a rotor connected to a third component of the planetary gearing and an input shaft of a gearbox connected to a second component of the planetary gearing. The method is started with the components of the planetary gearing interlocked by a locking means, in which they are released during the gear shifting and interlocked again after the gear shifting has been carried out.

Method for gear shifting in a hybrid vehicle

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.

Method of starting a vehicle with power balance

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.

Method for control of a propulsion system of a vehicle, a propulsion system, a computer program product and a vehicle

The present invention relates to a hybrid powertrain, comprising an internal combustion engine; a gearbox with an input shaft and an output shaft; a first planetary gear, connected to the input shaft; a second planetary gear, connected to the first planetary gear; a first electrical machine, connected to the first planetary gear; a second electrical machine, connected to the second planetary gear; at least one gear pair, connected with the first planetary gear and the output shaft; and at least one gear pair, connected with the second planetary gear and the output shaft, wherein the internal combustion engine is connected with the first planetary gear via the input shaft, wherein a countershaft is arranged between the respective first and second planetary gears and the output shaft; and the countershaft is connected with the output shaft via a range gearbox.

Hybrid powertrain and a vehicle with such a hybrid powertrain

Provided is a method to control a hybrid powertrain to achieve reverse drive, comprising an internal combustion engine, a gearbox with input output shafts; a first planetary gear connected to the input shaft and a second planetary gear; first and second electrical machines respectively connected to the first and second planetary gears; 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, wherein the internal combustion engine is connected with the first planetary gear via the input shaft. The method comprises: a) ensuring the moveable component parts in the first planetary gear are connected with each other and the moveable component parts in the second planetary gear are disconnected from each other; b) ensuring the gear pair connected with the second planetary gear and the output shaft are connected, and the gear pair connected with the first planetary gear and the output shaft are disconnected; and c) controlling the second electrical machine to achieve a negative torque in the output shaft.

Growing community of inventors

Stockholm, Sweden

Niklas Pettersson