Scania Cv Ab

Scania Cv Ab (publ)

Anders Kjell

Mikael Bergquist

Mathias Björkman

Niklas Pettersson

Johan Lindström

Fredrik Swartling

Tom Nyström

Jonas Udd

Peter Asplund

Hans Jönsson

Mikael Bergqvist

Jonathan Adolfsson

David Elfvik

Christian Wessel

Mikael Wägberg

Johnny Rickman

Johnny Arne

Torger Hagen

Sofie Wisén Svanström

Mathias BJÖRKMAN

Johan LINDSTRÖM

Mikael Hansson

A method is provided for controlling operation of a vehicle having at least one leading wheel axle and at least one trailing wheel axle. The method monitors a wheel slip of the wheels arranged at the at least one leading wheel axle and controls a wheel torque of the wheels arranged at the at least one trailing wheel axle based on: (i) the monitored wheel slip, (ii) a speed of the vehicle relative to the surface, and the distance between the at least one leading wheel axle and the at least one trailing wheel axle.

Method of controlling operation of a vehicle, computer program, computer-readable medium, control arrangement, and vehicle

A method for, during creep mode, performing gearshift in a vehicle powertrain comprising a combustion engine, a gearbox, and a clutch is provided. The method comprises, in response to a request for gearshift, disconnecting the combustion engine from the gearbox by opening the clutch. The method further comprises, when the combustion engine is disconnected from the gearbox, shifting the gearbox and controlling the speed of the combustion engine to a target speed. Said target speed constitutes a combustion engine speed corresponding a desired combustion engine torque for completing a torque ramp during closing of the clutch. The method further comprises connecting the combustion engine to the gearbox by closing the clutch. A control device configured to perform the method and a vehicle comprising the control device are also provided.

Control device, vehicle, computer program, computer readable medium and method for performing a gearshift during creep mode

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 and a system for controlling a backlash of a powertrain included in a vehicle in connection with a gear shifting operation is presented. The method comprises: controlling, in connection with a first gear shifting operation, a clutch included in the powertrain to a slipping position, in which slipping position the clutch transfers a slipping torque that is less than a torque being transferred in a closed position for the clutch; analyzing a change of a rotational speed for an input shaft of a gearbox included in the powertrain; determining a position for the clutch, for which position the change of the rotational speed has a value corresponding to a backlash torque, the backlash torque having a predetermined value for eliminating the backlash; and utilizing the determined clutch position for controlling the clutch in connection with a second subsequent gear shifting operation.

Control of a powertrain backlash

A method for braking 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 three components in the form of a sun gear (), a ring gear () and a planet wheel carrier (). The vehicle is driven with one of the components connected to an output shaft of the combustion engine rotating with a lower rotational speed than one of the components connected to the electric machine. When the vehicle is braked, the electric machine is controlled to apply a brake torque to the input shaft of the gearbox, making the rotational speed of the combustion engine increase.

Method for braking a vehicle

A method for driving a hybrid vehicle with a propulsion system including a combustion engine, an electric machine with a rotor and a stator and a planetary gear with three components including a sun gear, a ring gear and a planet wheel carrier, where an output shaft of the combustion engine is connected to a first component, an input shaft of a gearbox is connected to a second component and the rotor of the electric machine is connected to a third component. The vehicle is driven forward by the electric machine. The reverse gear engaged in the gearbox drives the third component of the planetary gear to rotate with a negative rotational speed while a brake brakes the first component. Thereafter, move the component brake to an open position, so that the output shaft of the combustion engine rotates with a positive rotational speed so that the combustion engine may be started.

Method for driving a hybrid vehicle in connection with start of the combustion engine of the vehicle

A method for moving off of a hybrid vehicle with a propulsion system () including a planetary gear with three components: a sun gear (), a ring gear () and a planet wheel carrier (). The output shaft () of a combustion engine () is connected to a first component of an input shaft () of a gearbox () is connected to a second component and the rotor () of an electric machine () is connected to a third component. The propulsion system has a locking device transferable between a locking position and a releasing position respectively, in which the components rotate as a unit and with different rotation speeds respectively. The method starts from an initial state with the combustion engine idle, the locking device in the releasing position and a gear, appropriate for moving off, engaged in the gearbox. The electric machine is controlled to apply a positive torque on the third component of the planetary gear, and the rotation speed of the combustion engine is controlled towards a constant rotation speed. A reaction torque is created and gives rise to a demanded driving torque, whereby the vehicle moves off.

Method for moving off a hybrid vehicle

A drive system and a method of driving a vehicle in which the drive system includes a combustion engine, a brake device for braking the vehicle, an electric machine, an energy storage connected to the electric machine, at least one electric assembly operated by electric energy and a planetary gear including a sun wheel, a ring wheel and a planet wheel holder. A control unit is adapted to, when the vehicle is in motion, a driving moment is demanded and a coupling member is in a first position, based on a comparison between the demanded driving moment and a necessary moment required for operation of the electric assembly, control at least one of the combustion engine, the brake device and the electric machine such that desired electric energy is provided for operation of the electric assembly.

Drive system and method of driving a vehicle

A method for controlling a drive system of a vehicle. The drive system includes a combustion engine () with an output shaft (), a gearbox () with an input shaft (), an electrical machine () that comprises a stator () and a rotor (), and a planetary gear that comprises a sun gear (), a ring gear () and a planet wheel carrier (). If the torque from the combustion engine and the electrical machine is sufficient for the operation of the vehicle with the planetary gear in the released state, and if the fuel consumption of the vehicle with the planetary gear in the released state is lower than in the locked states, then control the electrical machine and the combustion engine so that the requested torque is provided while the planetary gear is in the released state. Otherwise the planetary gear is arranged in the locked state and the method is terminated.

Method for controlling a drive system of a vehicle, a drive system, a computer program, a computer program product and a vehicle

A method for gearchange in a gearbox of a vehicle driving, said vehicle having a propulsion system comprising 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 (). The gearchange is carried out with the components of the planetary gear allowed to rotate with different rotational speeds and is finished by interlocking them. The combustion engine is controlled with respect to rotational speed during the gearchange towards the rotational speed required for the interlocking.

Method for gearchange in a hybrid vehicle

A method for braking a vehicle driving forward towards stop. 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 braking the vehicle, a reverse gear of the gearbox is engaged and the electric machine is controlled to apply brake torque requested to the input shaft of the gearbox.

A method for controlling a drive system of a vehicle, the drive system including a combustion engine with an output shaft, a gearbox with an input shaft, an electrical machine including a stator and a rotor, and a planetary gear with a sun gear, a ring gear and a planet wheel carrier. The combustion engine may be active or inactive. A braking device may be active or passive. The planetary gear may be released or locked. The method includes arranging the planetary gear in the released state, the combustion engine in inactive state, the braking device in active state, and, when information on a requested torque for the operation of the vehicle is received, controlling the electrical machine to provide the requested torque with the combustion engine inactive, the braking device active and the planetary gear released.

A method for driving a vehicle having a propulsion system comprising 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. The vehicle is driven with the members of the planetary gear interlocked. The planetary gear is brought to the releasing position by controlling the torque of the electric machine and of the combustion engine towards torque balance in the planetary gear.

Method for simultaneous control of torque from combustion engine and electric machine in a hybrid vehicle

A method for determination of a first parameter Rwhich represents a motive force capacity of a motor vehicle () provided with a power train which may assume various transmission ratios for propulsion of the vehicle (). The vehicle includes an engine () and a gearbox (). The first parameter Ris determined on the basis of a difference between a first motive force Fand a second motive force F. The first motive force Fis a maximum motive force available for the vehicle () at a current transmission ratio. The second motive force Fis a current running resistance for the vehicle (). There is a use of such a parameter. A computer program, a computer program product, a system and a motor vehicle related to such a parameter are disclosed.

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Ekerö, Sweden

Anders Kjell