Scania Cv Ab

Mats Liwell

Mattias Nilsson

Afram Kourie

Fredrik Sundén

Mikael Wågberg

Mikael Öun

Peter Asplund

Fredrik Sunden

Kourie Afram

The present invention relates to a method to control a hybrid powertrain, comprising a combustion engine, an electric machine, a gearbox with input shaft and output shaft, wherein the combustion engine and the electric machine are connected to the input shaft. The method comprises the following steps: a) disconnecting the combustion engine from the input shaft with a coupling device, b) engaging a starting gear in the gearbox, which starting gear is higher than the gear at which the combustion engine's torque at idling speed is able to operate the input shaft, c) generating a torque in the input shaft with the electric machine, d) accelerating the electric machine, and e) connecting the combustion engine to the input shaft with the coupling device when the electric machine has reached substantially the same rotational speed as the combustion engine. The invention also relates to a hybrid powertrain and a vehicle.

Method for controlling a hybrid powertrain, a hybrid powertrain, and a vehicle comprising such a hybrid powertrain

The present invention relates to a method for decelerating a vehicle comprising an electrical machine being arranged to provide a controllable torque to at least one drive wheel, said vehicle including driver controllable means for actively requesting a torque for propelling the vehicle. The method includes, when a driver request for a propelling torque is reduced at least to a first extent: applying a first brake torque by means of said electrical machine, by means of said first brake torque, decelerate said vehicle to a stationary state, and by means of said electrical machine, when said vehicle has been decelerated to said stationary state, continue applying a torque by means of said electrical machine to keep said vehicle in said stationary state.

Method and system for decelerating a vehicle

A method for shifting in a vehicle () with a hybrid powertrain (), the powertrain includes: a combustion engine (), an electric machine (), a gearbox () with an input shaft () and a main shaft (), wherein the combustion engine () and the electric machine () are connected to the input shaft (); and a lay shaft (), via gear sets (and) is connected to the input shaft () and the main shaft (), so that they form a split gear unit () and a main gear unit (). The method has the steps: a) to bring the main gear unit () into a substantially zero torque state, b) in the event the input shaft () and the lay shaft () must both be accelerated or decelerated: to initiate synchronization of the speed of the lay shaft () with, on the one hand, the speed of the input shaft (), and, on the other hand, the speed of the main shaft (), at a joint first point in time (t), c) to engage a gear in the split gear unit () when the speed of the lay shaft () has been synchronized with the speed of the input shaft () at a second point in time (t), and d) to engage a gear in the main gear unit () when the speed of the lay shaft () has been synchronized with the speed of the main shaft () at a third point in time (t). Also a hybrid powertrain () and a vehicle (), as well as a computer program (P) and a computer program product are disclosed, which perform the method.

Method for fast change of gears in a vehicle comprising a hybrid driveline

A method to control a hybrid powertrain () in a vehicle, the powertrain including a combustion engine (), an electric machine () and a gearbox () with an input shaft () and output shaft (), wherein the combustion engine () and the electric machine () are connected to the input shaft (). The method includes the steps of controlling the gearbox () to a neutral position; controlling the speed of the electric machine () to a predetermined speed, corresponding to a target speed for the input shaft () according to the next selected gear; engaging a gear in the gearbox (); controlling the electric machine (), so that the electric machine () accelerates or decelerates depending on a requested driving torque for the vehicle (); detecting when a control signal for the electric machine () corresponds to a predetermined signal value; and controlling the electric machine () to the requested driving torque. Also, a hybrid powertrain and a vehicle (), and a computer program (P) and a computer program product for performing the method are disclosed.

Method for controlling gear shifting in a hybrid driveline by use of an electric machine

A method for controlling a clutch which pertains to a vehicle and which is operated by means of a vehicle control system. The vehicle is provided with an engine, and a driver of the vehicle requests propulsive force from the engine. A first propulsive force requested by the driver and transmitted via a clutch involves determining whether the clutch slips while transmitting the first propulsive force. When the clutch slips during transmission of the first propulsive force, the propulsive force transmitted by the clutch increases. The invention relates also to a system and a vehicle.

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Södertälje, Sweden

Mats Liwell